JP3987397B2 - Surface coating method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a surface coating method and apparatus, and more particularly to a surface coating method and apparatus for efficiently coating the surface of an insulating member such as plastic or a metal member provided with an insulating film.
[0002]
[Prior art]
  Conventionally, when coating the surface of an insulating member such as plastic or a metal member provided with an insulating film, indoor dust tends to adhere to the object to be coated due to electrostatic adsorption, so as to eliminate this. Various attempts have been made such as, for example, painting work in a clean room, or performing surface coating after the object to be coated is subjected to a dust removal and charge removal process.
  The surface coating for this type of member is performed in advance of the paint spraying process, in which a dust removal process of blowing clean air is performed first, and then the static electricity adhering to the surface and the minute dust adsorbed by the static electricity are removed. After that, the above-mentioned paint spraying process is executed in a flow of clean air or in a clean room, and then transferred to an inspection process, followed by natural drying or forced drying with moderate hot air. It is moved to a drying process such as, and finished.
[0003]
[Problems to be solved by the invention]
  However, in order to remove dust by such a method, for example, the dust concentration of air flowing into the clean room must be constantly monitored, and the object to be painted after the dust removal and charge removal process is electrically isolated from the surroundings. It was necessary to have a lot of auxiliary equipment. For this reason, a lot of equipment costs have to be invested in the painting process, resulting in an inconvenience that the product cost increases.
  In addition, even if dust removal or static elimination is performed on the object to be coated, a small amount of dust in the air is adsorbed during the process of moving the product before painting depending on the material of the plastic or insulating film. It took a lot of time and effort to check the surface, and was always accompanied by the disadvantage of poor productivity.
[0004]
  In addition, since dust adhesion changes according to changes in temperature and humidity, the temperature and humidity are checked each time, especially when painting important products, and the air flow for dust removal is increased. In other words, prior checks are required by changing the concentration of paint, changing the timing of spraying paint, and the check requires a lot of skill. For this reason, there has often been a disadvantage that defective products continue to occur when the surrounding environment changes.
[0005]
OBJECT OF THE INVENTION
  The present invention improves the inconveniences of the above-mentioned conventional example, and when the surface coating of an insulating member such as plastic or a metal member with an insulating film (hereinafter referred to as “plastic etc.”) is performed under normal coating conditions. To provide a surface coating method and apparatus capable of effectively suppressing the adhesion of dust to the surface of an object to be coated even if there is a change in the surrounding environment and improving the surface coating quality for plastics and the like. Is the purpose.
[0006]
[Means for solving the problems]
  In order to achieve the above object, according to the first aspect of the present invention, a dust removal step of blowing dust removal air onto the surface of an object to be painted such as plastic, and spraying on the surface of the object to be coated at a predetermined timing after the dust removal step. A paint spraying process for spraying a paint in the form of a paint, and a drying process for drying the object to be coated after painting after the paint spraying process.
[0007]
  And the paint spraying process mentioned aboveSame asSometimes (including the case where the phase is shifted for several seconds), the surface of the object to be charged is neutralized by a predetermined ion, and in this static neutralization process, a breathable guide is provided on both sides of the object to be coated. A clean air flow for dust removal that flows from one side to the other with respect to the object to be coated is provided inside the filter that is opposed to the air and is surrounded by the air-permeable guide filter. Spraying directly toward the object to be coated to form a flow of ion for discharging along the clean air flow at least around the object to be coated, and the paint spraying step is performed by the charge removing operation step. A structure is adopted in which the surface of the coated object is discharged while the paint is sprayed from the outside to the inside of the air-permeable guide filter.
  In this case, the clean air flow for dust removal may be the one in which the dust removal process described above is continuously operated or a dust air flow formed by another method. The same applies to other claims.
[0008]
  For this reason, in the first aspect of the present invention, the dust having ions that could not be removed from the surface of the object to be coated in the previous step is the ions (actually positive ions and negative ions) that are output in the static elimination work step. Are both neutralized and the adsorbing force disappears and falls, or ions of the same polarity repel each other and diffuse. For this reason, it becomes possible to largely eliminate the amount of dust adsorbed on the surface of the object to be coated, and the surface of the object to be coated can be painted with little adhesion.
[0009]
  In addition, since this state of the static elimination work process is continued while the surface of the object to be coated is being executed in the paint spraying process, for example, between the spray paint and air that rapidly moves in the air during the painting. Static electricity generated by friction is effective as a target, and the static elimination action is executed continuously.
  For this reason, the surrounding ionized dust is less likely to be involved during painting, and the static elimination operation is performed in a stable state during painting.
(Thus, according to the present invention, the amount of dust adhering to the surface of the object to be coated can be greatly reduced, and the productivity is greatly improved.)
  In addition, since the air-permeable guide filter is provided, the airflow for dust removal becomes a natural state, and the ambient air is allowed to flow in somewhat, and it effectively removes dust from room air that is gradually being engulfed at the same time. obtain.
  Further, since the spray paint is sprayed from the outside to the inside of the air-permeable guide filter, the air to be removed and the flow of ions for discharging are not disturbed. The spray paint can be sprayed onto the object to be coated in the air flow for dust removal and the ionization ion for neutralization, aiming at the surface immediately after that, and it is covered in a state where dust intrusion from the surroundings is suppressed as much as possible. It is possible to paint effectively on a painted object.
  Further, the dust remaining around immediately after the charge removal can be effectively removed from the surroundings of the object to be coated by the air flow for dust removal, so that the dust entrained by the spray paint in the paint spraying process can be removed. The amount can be eliminated more effectively. In this respect, it is advantageous in that the accuracy (quality) of the coating on the object to be coated can be further improved.
[0010]
  According to the second aspect of the present invention, the surface of the object to be coated is discharged with a predetermined ion by operating the charge removal operation process before the start of the paint spraying process. In addition, since the static elimination operation is continued before the start of the paint spraying process and the static elimination operation is continued, fine dust that cannot be removed in the dust removal process is effectively removed before spraying the paint. This can be continued even after the paint is sprayed, so that it is possible to continue painting while effectively removing the fine dust remaining on the surface of the object to be coated, without involving surrounding dust. It is possible to smoothly perform the painting work on the object to be coated.
  In addition, since the air-permeable guide filter is provided, the airflow for dust removal becomes natural, and the ambient air is allowed to flow in somewhat, while effectively removing dust from room air that is gradually being engulfed. obtain.
  Further, since the spray paint is sprayed from the outside to the inside of the air-permeable guide filter, the air to be removed and the flow of ions for discharging are not disturbed. The spray paint can be sprayed onto the object to be coated in the air flow for dust removal and the ionization ion for neutralization, aiming at the surface immediately after that, and it is covered in a state where dust intrusion from the surroundings is suppressed as much as possible. It is possible to paint effectively on a painted object.
  Further, the dust remaining around immediately after the charge removal can be effectively removed from the surroundings of the object to be coated by the air flow for dust removal, so that the dust entrained by the spray paint in the paint spraying process can be removed. The amount can be eliminated more effectively. In this respect, it is advantageous in that the accuracy (quality) of the coating on the object to be coated can be further improved.
[0011]
  According to a third aspect of the present invention, in the surface coating method according to the first or second aspect, in the static elimination work step, a predetermined angle within 90 ° with respect to the air flow with respect to the position of the object to be coated. A configuration is adopted in which ions for charge removal are sprayed onto the object to be coated from an inclined direction.
[0012]
  For this reason, the invention described in claim 3 has the same function as that of the invention described in claim 1 or 2 described above, and discharge ions are applied to the object to be coated from an oblique direction with respect to the air flow for dust removal. The discharge ion can be injected toward the object to be coated while maintaining the smooth flow of the dust removal air flow. In this respect, the discharged dust can be more smoothly discharged. There is an advantage that it can be excluded from the object to be coated.
[0013]
  According to a fourth aspect of the present invention, there is provided a dust removing process for blowing dust removing air onto the surface of an object to be painted such as plastic, and a paint for spraying a sprayed paint onto the surface of the object to be coated at a predetermined timing after the dust removing process. In the surface coating method comprising a spraying step and a drying step of drying the object to be coated after painting after the paint spraying step, the paint spraying stepSame asThe neutralization operation process is performed to remove static electricity from the surface of the object to be coated with predetermined ions, and in this neutralization process, a breathable guide filter is disposed opposite to both sides of the object to be painted, and the air permeability A clean air flow for dust removal that flows from one side to the other with respect to the object to be coated is provided inside the guide filter, and the ions are directly sprayed toward the object to be coated in the clean air flow. Thus, at least around the object to be coated, a flow of ion for discharging is formed along the clean air flow, and the paint spraying step is performed by the discharging operation step from the same direction as the flow direction of the clean air. While removing the surface of the object to be coated, the paint is sprayed and executed at the same time.
  In this way, the flow of the spray paint is the same as the air flow for dust removal and there is a wide spread, so the probability of entrainment of dust removal from outside the area of the object to be coated is reduced, and in this respect dust adhesion is suppressed. There is an advantage that spray coating can be executed in a state where the coating is carried out, and the object to be coated carried along the droop transfer line can be dealt with continuously.
[0014]
  According to a fifth aspect of the present invention, there is provided a dust removing step for blowing dust removing air onto the surface of an object to be coated such as plastic, and a paint for spraying a sprayed paint onto the surface of the object to be coated at a predetermined timing after the dust removing step. In the surface coating method comprising a spraying step and a drying step of drying the object to be coated after painting after the paint spraying step, the paint spraying stepSame asThe neutralization operation process is performed to remove static electricity from the surface of the object to be coated with predetermined ions, and in this neutralization process, a breathable guide filter is disposed opposite to both sides of the object to be painted, and the air permeability A clean air flow for dust removal that flows from one side to the other with respect to the object to be coated is provided inside the guide filter, and the ions are directly jetted toward the object to be coated in the clean air flow. At least around the object to be coated, a flow of ion for discharging is formed along the flow of clean air, and a flow of ion for discharging and a flow of spray paint to the object to be coated and the cleaning are formed. A configuration is adopted in which the angle formed by the air flow is set to a predetermined angle within 90 ° and blown out from the same position.
  In this way, the spray paint and ions are sprayed onto the object to be coated in a direction orthogonal to the dust removal air flow, and from a position that does not interfere with the flow of the dust removal air flow that wraps around the object to be coated. Therefore, the object to be painted is uniformly wrapped by the spray paint, jet ions, and the air flow for dust removal, and the neutralization and dust removal actions on the object to be coated are effectively carried out in a stable state. It becomes.
[0015]
  Invention of Claim 6(Surface coating equipment)Then, a paint spraying means for spraying spray paint on the object to be coated such as a dust-removed plastic, and the paint spraying meansAttached toIon spraying means for discharging static electricity directly spraying positive ions and negative ions for discharging on the surface of the object to be coated, a booth for sucking and discharging spray paint sprayed and diffused by the paint spraying means, and the ion discharging means for discharging And a breathable guide filter that extends opposite to the booth and that operates in conjunction with the operation of the paint spraying means. And an output adjusting mechanism that adjusts the amount of positive ions, negative ions, and the like that are directly sprayed on the object to be coated, and close to the object to be coated. And the paint spraying means is arranged outside the air-permeable guide filter arranged oppositely.It has a configuration of “Yes”.
[0016]
  For this reason, after removing the object to be coated, the spraying of the paint on the object to be coated and the spraying of the ion for discharging are continuously and reliably performed by the action of the linkage starting means. In this case, the dust from the surface of the object that could not be removed and the dust removed from the surface of the object to be coated while the paint spraying unit is operating are removed by the ion for discharging that is output from the ion discharging unit for discharging. Even during spraying of paint, it can be effectively eliminated continuously.
[0017]
  In this case, the action of the ion for static elimination with respect to the ionized dust removal is the same as that in the case of the first aspect of the invention described above, and works effectively in dust removal.
  For this reason, it is possible to effectively coat the surface of the object to be coated with a small amount of dust removal.
[0018]
  Invention of Claim 7(Surface coating equipment)Then, a paint spraying means for spraying spray paint on the object to be coated such as a dust-removed plastic, and the paint spraying meansAttached toIon spraying means for discharging static electricity directly spraying positive ions and negative ions for discharging on the surface of the object to be coated, a booth for sucking and discharging spray paint sprayed and diffused by the paint spraying means, and the ion discharging means for discharging And a breathable guide filter that extends opposite to the booth and that operates in conjunction with the operation of the paint spraying means. A dust removing device that blows dust-removing air toward the object to be coated through the air-permeable guide filter disposed oppositely on the opposite side of the booth with the ion-injecting means for discharging. Air output means, and positive ion and negative ions for static elimination that spray the static elimination ion injection means directly on the object to be coated And having an output adjusting mechanism for adjusting the amount of on suchAnd beforeThe paint spraying means is arranged outside the air-permeable guide filter arranged oppositely.It has a configuration of “Yes”.
[0019]
  For this reason, dust removal air output means for blowing out dust removal air is provided, so that it can be continuously operated on the object to be coated even during painting, and in this way, during operation of the paint spraying means Dust with reduced adhesion force can be effectively swept away to the booth side, and it is convenient because part of the dust removal inside the room can be suppressed.
[0020]
  According to an eighth aspect of the present invention, in the surface coating apparatus according to the sixth or seventh aspect, the linkage activation unit has a priority operation setting function that causes the operation of the ionization means for discharging to precede the operation of the paint spraying unit. It was supposed to have.
[0021]
  For this reason, since the ion for discharging is sprayed on the object to be coated prior to the operation of the paint spraying means, the paint can be applied to fine dust that could not be removed even when the dust removing air output means is operated. This can be effectively eliminated before the spraying operation, and the quality of the coating on plastic or the like can be further improved.
[0022]
  According to a ninth aspect of the present invention, in the surface coating apparatus according to any one of the seventh to ninth aspects, the dust removal air output means is a dust removal air injector having portability.
  Even if it does in this way, in addition to being able to obtain the same function as the invention of the thirteenth aspect described above, the position and number of the ion generating means for static elimination are matched with the size and shape of the object to be coated. There is an advantage that it can be freely changed and set, and an optimum coating environment can be set in accordance with the object to be coated.
[0023]
  According to a tenth aspect of the present invention, in the surface coating apparatus according to any one of the seventh to ninth aspects, the dust removal air output means targets the entire object to be coated and outputs a dust removal air flow. It was assumed that the part was a dust-removing air output machine having a planar shape.
[0024]
  If it does in this way, it will be in the state where a to-be-painted object is uniformly wrapped with the air flow for dust removal, and since the turbulent flow around the to-be-painted object is reduced, it is less likely that the dust in the room is involved. For this reason, it is possible to perform coating while effectively removing dust from the surface of the object to be coated by operating the ion-ejecting means for discharging and the paint spraying means at the same time while maintaining such a state. Surface coating can be performed.
[0025]
  According to an eleventh aspect of the present invention, in the surface coating apparatus according to any one of the seventh to ninth aspects, in the surface coating apparatus according to any one of the seventh to ninth aspects, The ion-removing ion injection means is provided in the dust-removing air output means so that the output ion flow is in the same direction as the dust-removing air output from the dust-removing air output means.
[0026]
  In this way, the object to be coated is disposed while the flow of ion for discharging and the flow of air for dust removal are integrated, so that the dust that has been ionized and adhered to the object to be coated is effectively removed. Can be removed and continuously removed with dust-removing air. Dust trapped on the object to be painted from the outside is mostly neutralized by the ions for discharging before adhering to the object to be painted. Is discharged.
  Since such a state can be continuously executed even during painting, adhesion of fine dust from the surface of the object to be coated is effectively eliminated even during painting, and high-quality surface painting can be performed.
[0027]
  According to a twelfth aspect of the present invention, in the surface coating apparatus according to any one of the seventh to ninth aspects, an ion flow output from the ion-ejecting means for discharging and an air flow output from the air-output means for removing dust. Are output from different directions within 90 [deg.] And intersect with each other in the region of the object to be coated.
[0028]
  In this way, it is possible to inject static elimination ions onto the object to be painted from an oblique side without disturbing the air flow for dust removal, and it adheres to the object to be painted in an optimum state depending on the size and shape of the object to be painted. It is possible to neutralize the ionized dust to eliminate its adhesion, and to remove it from the object to be coated by putting it on the air flow for dust removal, and this state can be continuously executed even during spraying of the paint. For this reason, a good-quality surface coating can be performed.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0030]
[First Embodiment]
  1 to 2 show a first embodiment.
  1 and 2, reference numeral 1 denotes an object to be coated made of an insulating member such as plastic, and reference numeral 2 denotes dust removal air output means for blowing clean air for dust removal toward the object to be coated 1. Reference numeral 3 denotes a paint spraying means, and reference numeral 4 operates almost simultaneously with the operation of the paint spraying means 3 (including a case where the paint spraying means is shifted by several seconds), and positive ions and negative ions for discharging are applied to the surface of the object to be coated. The ion injection means for static elimination which sprays ion is shown. Reference numeral 105 denotes a booth that uniformly sucks and discharges the air around the object 1, particularly the spray paint that has passed through the object 1 and diffused around the object 1.
[0031]
  Here, as the article 1 to be coated, in the present embodiment, a plastic one having a bottom surface opened and formed in an inverted U-shaped cross section is handled. The object 1 having an inverted U-shaped cross section is held on the inside by a holding base 6 for the object to be rotated, which is formed to be rotatable. Reference numeral 6A denotes a holding protrusion that protrudes upward from the center of the holding base 6 for the object to be coated. The holding base 6 for the object to be coated has a structure in which the holding protrusion 6A described above can be manually rotated. Reference numeral 6B denotes a manual driving rod that is set to project outward. In the present embodiment, four drive rods 6B are provided at equal intervals, and the object to be coated 1 can be manually rotated counterclockwise or clockwise by rotating it in the left direction or the right direction. It is like that.
[0032]
  Further, the holding base 6 for the object to be coated is configured so that the holding protruding portion 6A is rotationally driven by a driving motor via a predetermined rotating mechanism and an electromagnetic clutch (not shown).
  Reference numeral 6C denotes a drive motor in this case. The drive motor 6C is rotated by the main control unit 10 and the turntable drive control unit 11 shown in FIG. 2 in accordance with the rotation operation (the optimum speed for painting) of the holding projection 6A described above (arrow A). ) And the rotation speed are controlled, and the stop position can be freely set.
[0033]
  In this case, the above-described electromagnetic clutch (not shown) is preferentially actuated by a separately provided control circuit when the drive motor 6C is started and stopped, and the drive motor 6C is part of the holding protrusion 6A described above. It has a function of connecting to or disconnecting from the rotating mechanism portion connected to the.
[0034]
  When the workpiece 1 is manually rotated, the drive rod 6B is rotated along the holding table 6 without starting the drive motor 6C. As a result, the object 1 can be rotated by a predetermined amount in the direction of arrow A in FIG. 1 (or the opposite direction) in FIG. The painted surface can always be installed facing the spray gun 3A for painting.
[0035]
  In the present embodiment, the dust removal air output means 2 described above is as shown in FIG.CoveredA portable dust removal air output machine having a planar air outlet 2A that uniformly blows out clean air for dust removal toward the paint 1 is used.
  In this embodiment, the dust removing air output machine as the dust removing air output means 2 is equipped with a plurality of dust removing filters on one surface (surface on the intake side) 2A and the other surface (surface on the sending side) 2B. In addition, a structure having a plurality of fans for intake and exhaust at the center is used, but a fixed structure having a structure for blowing out dust removal air introduced from the outside may be used.
[0036]
  The object to be coated 1 described above is disposed between the dust removal air output means 2 and the booth 105 described above.
  For this reason, since the air flow B for dust removal is set to flow uniformly from one side to the other around the object 1 to be coated, the dust in the room is directed toward the object 1 by the turbulent flow. Intrusion is suppressed (pushing to the downstream booth 105 side).
  Here, when the above-described object to be coated 1 is dust-removed in the previous process, the dust-removing air output means 2 does not have to be laid.
[0037]
  The above-mentioned paint spraying means 3 has a dust removal air flow B flowing from the left side to the right side as shown in FIG. It arrange | positions in the position which can spray spray paint on the to-be-coated object 1 mentioned above.
[0038]
  The paint spraying means 3 includes a spray gun 3A for spraying a predetermined spray paint toward the object 1 and a lifting / holding mechanism 3B for holding the spray gun 3A up and down and detachably. And an elevating drive motor 3C for driving the elevating / holding mechanism 3B, and a base portion 3D for holding the elevating / holding mechanism 3B described above.
[0039]
  In this case, in the actual application of the object 1, the object 1 first rotates (rotates counterclockwise) along the direction of arrow A in FIG. Then, the paint spraying means 3 is actuated to move the above-described coating spray gun 3A up and down. As a result, spray coating is performed in a dust-removing atmosphere on the surface immediately after the dust is removed, and the entire surface of the object to be coated 1 is painted over the entire surface.
[0040]
  Here, reference numeral 3S denotes a position sensor that detects position information in the vertical direction of the spray gun 3A for coating (see FIG. 2). Based on the information from the position sensor 3S, the main control unit 10 (see FIG. 2) operates as will be described later, and the elevation drive motor 3C is controlled to switch between forward / reverse rotation via the elevation mechanism drive control unit 12. As a result, the spray gun 3A for painting moves up and down along the article 1 so that spray painting can be performed covering the entire vertical direction of the article 1 to be coated.
[0041]
  In this embodiment, the spray gun drive control unit 13 (see FIG. 2) is activated based on the command from the main control unit 10 with respect to the strength of the paint spraying by the spray gun 3A for painting and the timing of starting it. As a result, the setting is controlled.
[0042]
  On the other hand, with respect to the operation of the spray gun 3A for coating, for example, the maximum amount of the jetted air that forms the sprayed paint is regulated by the spray gun drive control unit 13, and the strength of the jetted air is controlled during the actual use. You may comprise so that it may set freely according to the to-be-coated object 1 by the pressure adjustment mechanism 3Aa with which gun 3A was equipped.
  In addition, about the coating of the upper end surface part of the to-be-coated article 1, the spray coating of the paint is executed by another fixed paint spraying means (not shown) that operates simultaneously.
[0043]
  In the present embodiment, depending on the shape of the article 1 to be coated, the spray gun 3A for painting is removed from the elevation holding mechanism 3B as necessary, and spray painting (manual spray painting) is executed manually. It may be.
  In this way, it is possible to prevent the occurrence of defective parts such as paint omissions that are likely to occur in the shaded parts of the unevenness.
[0044]
  Further, in FIG. 1, reference numerals 16 and 17 denote breathable guide filters.
  The air-permeable guide filters 16 and 17 suppress this because the air pressure on the object to be coated 1 side is somewhat negative due to the flow of the dust-removing air flow B, and the surrounding dust is easily trapped. Therefore, a structure in which a planar filter member having good air permeability is incorporated in a predetermined frame is used.
  In the present embodiment, the air-permeable guide filters 16 and 17 are disposed as guides along the dust-removing air flow B, so that the flow of the dust-removing air flow is in a natural state and the inflow of ambient air is also prevented. There is an advantage that dust can be effectively removed even with respect to room air that is gradually engulfed little by little while allowing.
[0045]
  In this case, a breathable guide filter formed in the same manner as the breathable guide filters 16 and 17 may be disposed above the object to be coated 1 described above. In this way, in cooperation with the air-permeable guide filters 16 and 17, the generation of turbulent flow around the object to be coated 1 is effectively prevented, and relatively large dust intrudes into the object to be coated 1 side. It is convenient that the quality of the surface coating on the article 1 can be further improved.
[0046]
  In the present embodiment, the above-described ion-ejecting means 4 for discharging static electricity is arranged on the upstream side of the object to be coated 1 along the above-described air flow for dust removal, and ejects ions for discharging to the object to be coated 1. To get.
[0047]
  In the present embodiment, the ion-ejecting means 4 for removing static electricity is used to output positive ions and negative ions simultaneously or alternately in succession, and has a predetermined air pressure toward the object to be coated 1 described above. It comes to be erupted with expanse. The ion injection port 4A of the ion-ejecting means 4 for discharging is used, for example, having a predetermined length in the vertical direction in accordance with the above-mentioned object 1 to be coated, whereby the operation of the above-mentioned paint spraying means 3 is operated. In the middle, the entire object to be coated 1 can be covered with ejected ions for discharging.
[0048]
  In this embodiment, the above-described spray gun 3A for coating is disposed at a position obtained by rotating the surface of the object 1 to be neutralized by this ion ejection means 4 for neutralization by 90 ° counterclockwise. Predetermined spray paint is sprayed in the atmosphere of dust removal and charge removal to the object 1 that is being neutralized, so that not only the surrounding charged dust but also the dust removal that has adhered to the object 1 is removed. The plastic coating will be executed while effectively eliminating it.
[0049]
  In this case, the ion-ejecting means 4 for static elimination has the ion injection port 4A in a cylindrical shape, and the cylindrical ion injection port 4A is slightly swung in the vertical direction, whereby the entire object to be coated 1 is ionized. You may make it cover with.
[0050]
  As for the ion-injecting means 4 for static elimination, various shapes and operations are assumed in accordance with the shape of the object 1 to be coated. In any case, during the operation of the above-described paint spraying means 3, the object to be coated is used. It is important to be able to continuously cover the entirety of 1 with ions, and in this embodiment, as described above, the shape is made possible. And about the operation | movement of this ion injection means 4 for static elimination, the output (ion amount and air quantity) is controlled by the static elimination means drive control part 14 shown in FIG. 2, and the timing of the operation | movement is set. Yes.
[0051]
  Regarding the operation control of the ion ejection means 4 for static elimination, for example, the maximum amount of the output (the amount of ions and the amount of air) is regulated by the static elimination means drive control unit 13, and the magnitude of the output is for static elimination in actual use. You may comprise so that it may set freely according to the to-be-coated article 1 by the output adjustment mechanism 4Aa with which the ion injection means 4 was equipped.
[0052]
  A linkage starting means 5 for interlocking the ion ejection means 4 for discharging with the paint spraying means 3 described above is provided in the paint spraying means 3.
[0053]
  In this embodiment, as shown in FIG. 2, the link activation means 5 includes a link activation switch 5A provided between the paint spraying means 3 and the spray gun drive control unit 13, and the link activation switch 5A. A spray for coating after a predetermined time including zero, which is activated by the on operation of the interlock switch 4B for controlling on / off of the output of the static elimination means drive controller 14 in conjunction with the on / off drive and the linkage start switch 5A. And an activation timer 5C for outputting an activation signal for the gun 3A.
[0054]
  Here, in the present embodiment, the spray gun activation timer 5C can set an arbitrary delay time of about 30 seconds including zero, for example. For this reason, when the operator turns on the linkage activation switch 5A in this embodiment, the interlock switch 5B is simultaneously turned on (ON) to operate the ion ejection means 4 for static elimination. At the same time or after a predetermined time set in advance, an activation signal for the painting spray gun 3A is output from the activation timer 5C, whereby the painting spray gun 3A is activated.
[0055]
  It should be noted that, instead of the above-described linkage starting means 5, an ion injection priority control function is provided in advance in the above-described main control unit 10, and the above-described ion-implanting ion ejection means 4 is operated first according to a predetermined program when the entire apparatus is started up. The paint spraying means 3 may be operated after a predetermined time has elapsed. Even in this way, it is possible to obtain a coating apparatus having the same function as that provided with the above-described linkage starting means 5.
[0056]
  In this case, you may make it operate | move the ion injection means 4 for static elimination, and the paint spraying means 3 simultaneously according to a predetermined program. The main control unit 10 selects which operation is to be prioritized according to a predetermined command input from the operation command input unit 10B, and the entire system is driven and controlled by the selected method. .
[0057]
  Next, the overall operation of the first embodiment will be described.
  1 and 2, when the power supply circuit 100 is operated and the entire apparatus is set to an operating state, first, the dust removal air output means 2 and the booth 105 start to operate. Before or after the start of the operation of the dust removal air output means 2 and the booth 105, the above-described object 1 is placed on the object-holding base 6.
[0058]
  In this case, the object holder 6 is preliminarily equipped with an object detection sensor (not shown), and information from this sensor is sent to the main control unit 10. Then, the main control unit 10 that has input information from the sensor immediately drives the drive motor 6C to rotationally drive the object holding base 6 in the direction of the arrow A. The dust removal process is started.
[0059]
  Next, when a predetermined time elapses after the start of the dust removal process, the operator activates the link activation means 5.
  Specifically, the linkage activation switch 5A is turned on. As a result, the interlocking switch 5B is activated simultaneously with the linkage activation switch 5A, and the charge removal means drive control unit 14 is connected to the charge removal ion injection means 4, and the charge removal ion injection means 4 is activated to start the charge removal work process. .
  Here, in the present embodiment, the drive switch 3Ca for the drive motor provided on the output side of the lifting mechanism drive control unit 12 is also operated in conjunction with the operation of the linkage activation switch 5A, and the vertical movement of the spray gun 3A for painting is performed. Is supposed to start.
[0060]
  And when the output of the static elimination means drive control part 14 is set to an ON state by ON operation | movement (connection) of the interlocking | linkage switch 5B, the starting timer 5C of the linkage starting means 5 will also be started simultaneously. In this case, if the delay time zero is set in the activation timer 5C, the activation signal for the spray gun 3A for painting is immediately output from the activation timer 5C, whereby the operation of the ion ejection means 4 for static elimination described above is performed. At the same time, the spray gun 3A for painting is operated, and a paint spraying process for the same object 1 is started here. That is, the paint spraying process and the charge eliminating work process start simultaneously.
[0061]
  On the other hand, if a predetermined delay time (for example, 10 seconds) is set in the activation timer 5C, the activation signal for the spray gun 3A for painting is output from the activation timer 5C after the predetermined delay time (for example, 10 seconds) has elapsed. As a result, the spray gun 3A for painting is activated with a delay of, for example, 10 seconds with respect to the activation of the ion ejection means 4 for static elimination described above.
  The setting of the delay time of the activation timer 5C is arbitrarily set in advance by the operator depending on the material of the object 1 to be coated and the dust adhesion state in the previous process.
[0062]
  In any case, the paint spraying process for the same object 1 is started simultaneously with the start of the static elimination work process or after a lapse of a predetermined time. Thereafter, during the predetermined coating time, the spray gun 3A for painting and the ion for static elimination are applied. The state in which the injection means 4 operates simultaneously is continued.
[0063]
  Here, the neutralization / dust removal action on the object 1 to be coated, which is performed in the neutralization work process executed simultaneously with the paint spraying process, will be described.
[0064]
  First, the state of dust adhesion and the like that adheres to the article 1 is analyzed.
  The plastic that is the material of the object to be coated 1 is inherently an insulator and a dielectric. Therefore, the surface has a property of easily adhering positively or negatively charged dust existing in the surrounding air. I have. For this reason, even if it is the to-be-painted object 1 after dust removal and static elimination, dust adheres very naturally in the process of carrying this in to a coating area.
[0065]
  In addition, when surface coating is performed in a clean room, a part of the surrounding air rapidly and partially moves due to the spraying of the paint. When such an abrupt air flow is generated, friction is generated with the air that does not move, and positive and negative charged particles are generated on the friction surface of the air and adhere to the slightly existing dust to charge the dust. Let The dust charged positively or negatively is naturally attracted to and adhered to the workpiece 1 that is a dielectric.
  Also, positive or negative ions are partially generated and adhered to the surface of the object 1 by collision of fine particles of paint or solvent. In such a case, surrounding dust charged positively or negatively is instantaneously sucked and attached to the object 1 to be coated.
[0066]
  For this reason, even if it is the to-be-coated object 1 after dust-removing / discharging in the previous process, or surface coating in a clean room, it occurs during the transportation of the to-be-coated object 1 or during the spraying operation of the paint. In many cases, the charged dust adheres to the object to be coated 1 simultaneously with the spraying of the paint.
[0067]
  On the other hand, in the first embodiment described above, in the paint spraying process of the article to be coated 1, the static elimination work process is activated at the same time.
  In this case, the surface of the object to be coated 1 varies depending on the material, but is charged either positively or negatively according to changes in the surrounding environment, or in a state where a positively charged region and a negatively charged region are mixed. At the same time, a predetermined electric field is generated by the charging, and surrounding charged dust is attached.
  When air ions composed of positive ions and negative ions are sprayed on the article 1 in such a state, the following effects are obtained.
[0068]
  That is, the charged charge that comes into contact with ions of the opposite polarity is reduced, and the ions are lost from the dust and the adhesion of the dust to the object 1 is completely eliminated. For this reason, the neutralized dust is easily separated from the object 1 by a slight air flow.
  The air flow in this case may be generated by being sucked into the booth 105, by an air flow jetted together with ions by the ion removing ion ejecting means 4, or by a clean air flow by the dust removing air output means 2. Works effectively.
[0069]
  In this embodiment, since this state is continuously executed during the spraying of the paint, it adheres to the object 1 to be coated even before the charged dust generated during the paint spraying operation. Even for the dust that is being applied, the adsorbing force on the object to be coated 1 can be greatly reduced instantaneously, so that the adhesion of dust to the object to be coated 1 can be greatly reduced.
[0070]
  The above-described paint spraying process and static elimination work process are performed in the above-described number of revolutions of the object 1 (for example, two revolutions after the paint spraying process starts) and the number of reciprocations of the spray gun 3A for vertical movement (eg, paint spraying work starts 2 round trips) are measured by a separately equipped sensor, and the main control unit 10 that has input the sensor information is compared with data information relating to a predetermined reference number specified in advance. Stops control operations simultaneously. Then, it moves to the preparation for the next painting.
[0071]
  Such an operation stop program and necessary reference data are stored in the memory 10A in advance, and are selected when, for example, the aforementioned predetermined sensor information is input while the main control unit 10 executes the entire operation program. This is supposed to be executed.
[0072]
  Here, in the above-described embodiment, at the end of the paint spraying process, the main control unit 10 performs stop control of the control operation of the entire apparatus, and prepares for the next coating before the restart. Separately, for example, the switches 3Ca, 5A, 5B, and 6Ca are turned off while keeping the state of the overall control by the main control unit 10 as it is. The operation of the means 4, the holding base 6 for the object to be coated may be stopped individually or simultaneously so that the next object 1 can be prepared for coating.
[0073]
  When the paint spraying process is completed and the control operation of the entire apparatus is stopped, or the operations of the paint spraying means 3, the ion spraying means 4 for discharging static electricity, the holding base 6 for the object to be coated, etc. are stopped, The product 1 is unloaded by the operator, subjected to an inspection process and a drying process, and then sent to a finished product assembly process after waiting for a predetermined number of finishes in a dust-free chamber.
[0074]
  In this case, the program necessary for the control operation of each unit and the necessary reference data are stored in advance in the memory 10B provided in the main control unit 10, and the main control unit 10 can freely take out or store as necessary. It has come to be able to do.
[0075]
  Since the first embodiment is configured and functions as described above, dust having ions that could not be removed from the surface of the object to be coated 1 in the dust removal process is output as positive ions and minus ions that are output in the charge removal work process. They are partially neutralized by ions and lose their adsorptive power and leave, or ions of the same polarity repel each other and diffuse. For this reason, it becomes possible to largely eliminate the amount of dust adsorbed on the surface of the object to be coated, and the surface of the object to be coated can be painted with little adhesion.
[0076]
  In addition, since such a state by the static elimination work process is continued while the surface of the article 1 is being coated in the paint spraying process, for example, spray paint and air that rapidly move in the air during painting The static electricity generated by the friction is effective as a target and the static elimination action is continuously executed.
  For this reason, the surrounding ionized dust is less likely to be involved during painting, and the static elimination operation is performed in a stable state during painting. Thereby, in this embodiment, the adhesion amount of the dust adhering to the surface of the to-be-painted object 1 can be reduced significantly, and productivity is improved significantly.
[0077]
  Furthermore, if the static elimination operation process is activated before the start of the paint spraying process so that the surface of the object to be coated 1 is neutralized with predetermined ions, fine dust that cannot be removed in the dust removal process is effective before spraying the paint. Since it can be removed even after the paint is sprayed, it is possible to continue painting while effectively removing the fine dust remaining on the surface of the object to be coated. More effectivelyExecutioncan do.
[0078]
  In the first embodiment, spray paint is sprayed onto the object 1 from a position rotated 90 ° counterclockwise with respect to the air flow with respect to the position of the object 1. did.
  For this reason, the air flow for dust removal and the flow of ions for static elimination are not disturbed, and the surface of the object to be coated 1 immediately after the dust removal and charge removal is performed, and the air flow for dust removal and the flow of ions for static elimination are included. Thus, the spray paint can be sprayed onto the object 1 to be coated, and there is an advantage that the object 1 can be effectively coated in a state where the intrusion of dust from the surroundings is suppressed as much as possible.
[0079]
  Here, all the timings of starting / stopping each of the above steps may be arbitrarily set and executed manually by the operator.
  In this way, the direction of spraying of the spray paint and static elimination ions can be arbitrarily set according to the situation, particularly for the object 1 having a complicated shape, which is effective in implementing the coating method. It can be.
[0080]
[Second Embodiment]
  FIG. 3 shows a second embodiment of the present invention.
[0081]
  In the second embodiment shown in FIG. 3, a plurality of static elimination ion injection means 4 used in the static elimination work process are used instead of the dust elimination air output means 2 equipped in the first embodiment described above (in this embodiment, 3) equipped to enhance the output of the ion-ejecting means 4 for removing static electricity, and when removing the object to be coated 1 in the dust removing process described above, the ion-injecting means 4 for removing electricity is operated. It has.
  In this case, the ion-ejecting means 4 for static elimination functions as a dust-removing air injector in the dust-removing process, and functions as an original ion-ejecting means for static elimination in the charge-removing work process that operates almost simultaneously with the paint spraying process. The timing is set by the main control unit 10 described above.
[0082]
  In FIG. 3, reference numeral 3 indicates a paint spraying means, and reference numeral 6 indicates a holding base for an object to be coated. Each is formed in the same manner as in the first embodiment described above.
  Reference numeral 18 denotes a foldable breathable guide filter. This breathable guide filter 18 is highly useful in that it has a function of removing large dust without changing the entire air flow flowing around the object 1 to be coated.
  Other configurations and operations are the same as those of the first embodiment described above.
[0083]
  Even if it does in this way, in addition to the effect substantially equivalent to the case of 1st Embodiment mentioned above, the number of the ion injection means 4 for static elimination is increased / decreased according to the magnitude | size and shape of the to-be-coated object 1. (For example, it can be implemented by one), the movement adjustment of the installation place is easy, and in this respect, there is an advantage that versatility can be improved.
[0084]
[Third Embodiment]
  FIG. 4 shows a third embodiment.
[0085]
  In the third embodiment shown in FIG. 4, the ion injection direction with respect to the object to be coated 1 of the ion injection means 4 for static elimination used in the static elimination work process equipped in the second embodiment described above is set at the booth 105. Θ in the clockwise direction with respect to the air flow B₁And the spraying direction of the spray paint of the paint spraying means 3 is set to the left rotation direction with respect to the air flow B.₂This is characterized in that the ion spraying direction and the spraying direction of the spray paint are shifted.
[0086]
  In this case, in this embodiment, “θ₁= Θ₂= 45 ° ", but" θ₁+ Θ₂If it is ≦ 90 °, it may be arranged at any position.
[0087]
  In FIG. 4, reference numeral 3 indicates a paint spraying means, and reference numeral 6 indicates a holding base for an object to be coated. Each is formed in the same manner as in the first embodiment described above.
  Reference numeral 18 denotes a foldable breathable guide filter installed in the same manner as in the second embodiment. Further, in FIG. 4, a partitioning air-permeable guide filter 18 </ b> A is disposed between the paint spraying unit 3 and the ion-ejecting ion ejection unit 4 along the air flow B sucked by the booth 105.
[0088]
  This air-permeable guide filter 18A is useful in that it can remove large dust without changing the entire air flow flowing around the object 1 as in the case of the air-permeable guide filter 18 described above. It is expensive.
  Other configurations and operations are the same as those of the second embodiment described above.
[0089]
  Even in this case, it is possible to obtain substantially the same operational effects as in the case of the second embodiment described above, and further, spraying direction of spray paint and ion flow freely corresponding to the diversification of the object 1 to be coated. Can be changed, and versatility can be further enhanced in this respect.
[0090]
[Fourth Embodiment]
  FIG. 5 shows a fourth embodiment.
[0091]
  In the fourth embodiment shown in FIG. 5, the paint spraying means 3 equipped in the first embodiment described above is arranged at the same place as the ionizing ion ejecting means 4 installed on the dust removing air output means 2 side. It is characterized by the point.
  In this case, a cylindrical member is used as the ion-ejecting means 4 for static elimination, and is integrated with the coating spray gun 3A of the paint spraying means 3 so as to be movable up and down. Reference numeral 3 denotes a paint spraying means.
[0092]
  The paint spraying means 3 is substantially the same as in the first embodiment except that the ion-ejecting means 4 for discharging and the spray gun 3A for painting are incorporated and held in such a state that they can be moved up and down simultaneously. It has the same structure and the same function. Reference numeral 6 denotes a holding base for an object to be coated which is configured in the same manner as in the first embodiment described above.
  Other configurations and operations thereof are the same as those of the second embodiment described above.
[0093]
  Even if it does in this way, in addition to the effect substantially the same as the case of 1st Embodiment mentioned above, the spraying direction with respect to the to-be-coated object 1 and the injection direction of ion are the same direction as the air flow for dust removal. Since it is set, the spray paint and spray ions for the object to be coated 1 move while being entrained in the air flow for dust removal, so that the spread of the spray paint and spray ions can be set small. In this case, the consumption of paint can be effectively suppressed.
[0094]
  In the fourth embodiment, the case where the ion-ejecting means 4 for static elimination is integrated with the spray gun 3A for painting is illustrated, but the ion injection opening surface of the ion-injecting means 4 for static elimination corresponds to the object 1 to be coated. Then, use a fixed type that is long in the vertical direction, separate from the coating spray gun 3A, and beside the coating spray gun 3A (upstream in the rotation direction of the object 1). It may be configured.
[0095]
[Fifth Embodiment]
  FIG. 6 shows a fifth embodiment.
[0096]
  The fifth embodiment shown in FIG. 6 is characterized in that a foldable air-permeable guide filter 18 is provided in place of the dust removal air output means 2 provided in the fourth embodiment described above. The fifth embodiment is characterized in that the ion-injection means 4 for discharging used in the discharging operation process is operated when the object to be coated 1 is removed in the dust removing process described above.
[0097]
  In FIG. 6, reference numeral 3 indicates a paint spraying means, and reference numeral 6 indicates a holding base for an object to be coated. Further, the air-permeable guide filter 18 described above is highly useful in that it has a function of removing a large amount of dust without changing the entire air flow flowing around the object 1 to be coated. Yes.
  Other configurations and operations thereof are the same as those of the fourth embodiment described above.
[0098]
  Even if it does in this way, substantially the same effect as the case of the 4th embodiment mentioned above can be acquired.
[0099]
[6thEmbodiment]
  FIG. 7 shows a sixth embodiment.
[0100]
  The sixth embodiment shown in FIG. 7 is characterized in that the ion-ejecting means 4 for static elimination provided in the first embodiment (see FIG. 1) is arranged at the same place as the paint spraying means 3. Yes.
  In this case, a cylindrical member is used as the ion-ejecting means 4 for static elimination, and is integrated with the coating spray gun 3A of the paint spraying means 3 so as to be movable up and down. Reference numeral 3 denotes a paint spraying means.
[0101]
  This paint spraying means 3 is substantially the same as that in the first embodiment except that the ion-ejecting means 4 for discharging and the spray gun 3A for painting are integrated and held so as to be movable up and down simultaneously. The same configuration and the same function are provided. Reference numeral 6 denotes a holding base for an object to be coated which is configured in the same manner as in the first embodiment described above.
  Other configurations and operations are the same as those of the first embodiment described above.
[0102]
  Even in this case, it is possible to obtain substantially the same operational effects as in the case of the first embodiment described above, and the direction in which the spray paint and ions are sprayed onto the article 1 to be orthogonal to the air flow for dust removal. In addition, since the dust-removing air flow B that flows so as to wrap around the object to be coated 1 is formed at a position that does not obstruct the flow, the object to be painted 1 is formed by the spray paint, the jet ions, and the dust-removing air flow B. As a result, the neutralization action and the dust removal action on the object to be coated 1 are effectively carried out in a stable state.
[0103]
  In the sixth embodiment, the case where the ion removing ion ejection means 4 is integrated with the coating spray gun 3A is exemplified. However, the ion ejection opening surface of the ion ejection ion ejecting means 4 corresponds to the object 1 to be coated. Then, use a fixed type that is long in the vertical direction, separate from the spray gun 3A for painting, and be attached to the upstream side (with respect to the flow of dust removal air B) of the spray gun 3A for painting. It may be configured.
  In this case, by performing the operation of the ion-ejecting means 4 for removing electricity in advance, the object to be coated 1 is removed with the ions for removing electricity, and at the same time, the dust that has been discharged and has no adhesion is pushed away with the air flow for removing dust. The spray gun 3A can be operated, and in this respect, high-quality dust-removed plastic coating can be realized as in the case of FIG. 1 described above.
[0104]
[Seventh embodiment]
  FIG. 8 shows a seventh embodiment.
[0105]
  The seventh embodiment shown in FIG. 8 is adapted to correspond to an object having a relatively large shape as the object to be coated 1, and the static elimination is performed in the first embodiment (see FIG. 1) described above. It has a feature in that it is equipped with ion removing ion generating means 4G formed so as to be able to generate ion for discharging in a plane instead of the ion ejecting means 4 for use.
  Then, the ion for discharging formed by the ion generating means 4G for discharging is put on the air flow B from the air output means 2 for removing dust and is made to flow uniformly toward the object 1 described above.
  Further, in the seventh embodiment shown in FIG. 8, in actual operation, the ion generating means 4G for discharging and the air output means 2 for removing dust are operated first, and this is continued, and thereafter a spray gun for painting is used. 3A is actuated.
  Other configurations are the same as those in FIG.
  Even in this case, it is possible to obtain substantially the same operational effects as those of the first embodiment shown in FIG.
[Eighth embodiment]
  9 to 10 show an eighth embodiment.
[0106]
  The eighth embodiment shown in FIGS. 9 to 10 shows an example in the case where the article 1 is continuously conveyed on the conveying line 21. In this case, the object to be coated 1 is rotationally driven by the gear portion 22A attached to the hanging holding member 22 being in contact with a gear mechanism (not shown) in the coating region, whereby the entire outer surface around the object 1 is painted. It is like that.
[0107]
  In FIG. 9, reference numeral 2 denotes a dust output air output means,Reference numeral 105Indicates a painting booth. Reference numeral 3A denotes a spray gun for painting.
  Among these, the conveying line 21 for the object to be coated is disposed along the opening surface of the booth 105 so as to cross the dust removing air flow B output from the dust removing air output means 2 as shown in FIG. ing.
[0108]
  The spray gun 3A for painting is disposed on the dust removal air output means 2 side of the transport line 21 and sprays the spray paint on the object 1 along the dust removal air flow B (toward the booth 105). The paint injection direction is set so as to obtain.
  In this embodiment, the coating spray gun 3A is held so as to be movable up and down by a hanging holding means (not shown), whereby an optimum paint spraying position can be selected in accordance with the length of the article 1 to be coated. Yes.
[0109]
  Reference numeral 24 denotes an ion injection means for static elimination. As shown in FIGS. 9 (A) and 9 (B), this ion ejection means 24 for static elimination is formed with a long length in accordance with the object to be coated 1, and generates a plurality of ions for positive ions and negative ions. An electrode is provided so that positive ions and negative ions can be simultaneously and substantially simultaneously ejected onto the article 1 to be coated.
[0110]
  Further, this ion-injecting means 24 for static elimination is arranged on the upstream side of the aforementioned spray gun 3A for painting along the flow of the article 1 to be coated in the transport line 21, and is inclined with respect to the article 1 (dust removal). The ion for discharging can be ejected from the direction of the inclination angle α with respect to the flow direction of the air flow B.
[0111]
  If it does in this way, the spray area | region of the ion for ionization and the spray area | region by the spray gun 3A for coating can be piled up, and spraying of the spray paint is simultaneously performed while discharging the object 1 and removing dust in the same area. There is an advantage that productivity can be improved in this respect.
[0112]
  FIG. 10 is a control block diagram for setting the operation timing of the spray gun 3A for painting and the ion injection means 24 for static elimination.
  In FIG. 10, reference numeral 13 denotes a spray gun drive control unit that restricts the operation of the spray gun 3A for painting as in the case of the first embodiment described above, and reference numeral 14 restricts the operation of the ion injection means 4 for static elimination. The drive control part for static elimination means to perform is shown. Reference numeral 10 denotes a main control unit, reference numeral 10A denotes a memory, and reference numeral 10B denotes an operation command input unit. These are all configured substantially the same as the first embodiment (see FIG. 2) described above and function in the same manner.
[0113]
  The transfer line 21 described above includes a first detection sensor 21a for detecting the timing when the article 1 enters the painting region and a second detection sensor 21b for detecting the timing when the article 1 exits the painting region. Equipped.
  The sensor information detected by each of these sensors is sent to the above-described spray gun drive control unit 13 and neutralization means drive control unit 14 as an activation signal and an operation end signal, respectively. In this case, the sensor signal sent from the first detection sensor 21a to the spray gun drive control unit 13 is sent to the spray gun drive control unit 13 via the timer 21c.
[0114]
  Each detection sensor 21a, 21b and the timer 21c constitute a linkage starting means 21G. In the present embodiment, the priority operation setting function performed by the link activation means 21G is executed by setting the timer 21c. Thereby, it is possible to start the ionization means 4 for static elimination earlier than the spray gun 3A for painting.
[0115]
  As in the case of the first embodiment described above, the timer 21c of the linkage activation means 21G can set an arbitrary delay time including a delay time of zero, and the delayed activation signal (or the delay zero) It is sent to the spray gun drive control unit 13.
[0116]
  When the sensor signals from the first and second detection sensors 21a and 21b are inputted, the above-mentioned spray gun 3A for painting and the ion injection means 4 for static elimination are activated at this timing, and the object to be coated is here. The paint spraying process for 1 is performed, and at the same time, the charge eliminating process is performed. In this case, if a delay time of 3 seconds is set in the timer 21c, the paint spraying process for the article 1 is executed after the elapse of 3 seconds. And since this static elimination work process is continued while the surface of the article 1 is being painted, for example, floating static electricity generated by friction between the spray paint rapidly moving in the air and air during painting. Etc. are effective as targets, and the static elimination action is continuously executed.
[0117]
  Next, the overall operation in the eighth embodiment will be described.
  Before the object to be coated 1 is sent to the coating area S by the conveying line 21, the dust adhered in the dust removing process is removed. In this dust removal step, the charge removal by the blowing of ions is performed simultaneously with the blowing of clean air from which dust has been removed.
[0118]
  When the workpiece 1 that has passed through the dust removal process is sent to the coating area S by the conveying line 21, the first detection sensor 21a first detects the carry-in of the workpiece 1, and the detected sensor signal is driven by the spray gun. It is sent to the control unit 13 and the neutralization means drive control unit 14, respectively, and the spray gun 3A for painting and the ion injection means 4 for neutralization are activated. By the activation of the ion-ejecting means 4 for charge removal, the dust removal process, the charge removal work process, and the paint spraying process are simultaneously performed in the coating region S.
  In this case, by using the slow air flow generated when the booth 105 sucks the spray paint or dust diffused around the object 1 to be painted, the dust removal air output means 2 is stopped, and the static elimination work process is performed. And the paint spraying process may proceed simultaneously.
[0119]
  In this case, if the timer 21c has set a delay time of, for example, 5 seconds, the coating spray gun 3A starts operating with a delay of 5 seconds after the operation of the ion-ejecting means 4 for static elimination. That is, the static elimination work process enters an actual working state 5 seconds ahead of the paint spraying process. Such an operating state is canceled when the object to be coated 1 is detected by the first detection sensor 21b and passes through the coating region S. And the coated to-be-coated object 1 transfers to a test | inspection process and a drying process similarly to the case of 1st Embodiment mentioned above.
  Hereinafter, this state is repeatedly executed every time the article 1 is loaded.
[0120]
  Here, when the spray gun 3A for painting and the ion injection means 4 for static elimination are started simultaneously, the timer 21c may be set to zero delay time.
[0121]
  In the eighth embodiment, since it is configured and functions as described above, the paint spraying process and the charge eliminating work process are simultaneously performed on the object to be coated 1 in the same manner as in the first embodiment described above. Alternatively, the neutralization work process can be performed somewhat earlier, and the coating material spraying process and the neutralization work process are performed under the same conditions for the objects to be coated 1 continuously carried by the transport line 21. And can be executed effectively.
[0122]
  In this respect, the present embodiment has an advantage that even if there is no special clean room, plastic coating with less dust adhesion can be continuously applied to the object to be coated 1 carried in by the conveying line 21.
[0123]
  In the above eighth embodiment, the case where a vertically long ion ejection means 4 is equipped as the ion-ejecting means 4 for static elimination is illustrated, but depending on the shape of the article 1 to be coated, it has a shape equivalent to the spray gun 3A for painting. It may be a thing.
[0124]
[Ninth Embodiment]
  FIG. 11 shows a ninth embodiment.
  The ninth embodiment shown in FIG. 11 is the same as the above-described eighth embodiment disclosed in FIGS. 9 to 10 except that the ion spraying means 4 for static elimination is integrally provided in the spray gun 3A for painting.PointIt has the characteristics.
[0125]
  In this case, as shown in FIG. 11, the ion-ejecting means 4 for discharging static electricity is arranged on the upstream side of the conveying line 21 of the object to be coated 1, and the discharging direction of the ions for discharging electricity is also output from the air output means 2 for removing dust described above. Is set in a direction along the flow of the dust removal air flow B. Other configurations are the same as those of the eighth embodiment disclosed in FIGS. 9 to 10 described above.
[0126]
  Even if it does in this way, in addition to having an operation effect equivalent to 8th embodiment mentioned above, even if it operates the spray gun 3A for painting and the ion injection means 4 for static elimination simultaneously, the to-be-coated object 1 will be in the conveyance line 21. Because it is carried in from the upstream side,forIn such a point, the ion for discharging is first blown, and in this respect, even if the linkage starting means 21G is not operated, the ion discharging means 4 for discharging is operated prior to the operation of the spray gun 3A for painting. It is convenient in that it can obtain the same effect as the above.
[0127]
  In the ninth embodiment, the case where the ionizer for discharging static electricity is provided in addition to the spray gun 3A for painting is illustrated, but the ion spraying means for discharging is incorporated in the spray gun 3A for painting (not shown). ) May be used.
  Further, in the above-described eighth to ninth embodiments, the case where the dust removal air output means 2 is provided is illustrated. However, when the dust in the air is small, the dust removal air output means 2 is deleted. Also good.
[0128]
  As described above, a plurality of embodiments of the present invention have been described as examples. In each of the first to seventh embodiments described above, the spray gun 3A for painting is moved up and down while being held at a fixed position on the floor (ground). However, it may be configured so as to move up and down in a suspended state by providing means for retaining it in a suspended state from above.
[0129]
  In the fourth, fifth, and sixth embodiments, the case where the ion spraying means 4 for static elimination is provided in addition to the spray gun 3A for painting is illustrated, but the ion spraying means 4 for static elimination is provided in the spray gun 3A for painting. You may use what integrated and integrated.
[0130]
  Furthermore, in each of the first, second, fourth to seventh embodiments, the spray paint from the paint spray gun 3A is moved along the dust removal air flow B (or air flow equivalent thereto) flowing into the booth 105. However, if it is not a direction that flows back to the dust removal air flow B (or an air flow equivalent thereto), it is from an oblique direction upstream (at an arbitrary injection angle). ) You may set to spray spray paint.
[0131]
  Furthermore, with regard to the linkage starting means 5 disclosed in the first embodiment, the linkage starting switch 5A and the interlocking switch 5B are provided in the trigger part of the spray gun 3A for painting, and each of these switches 5A and 5B is connected to the trigger part. Even if it is attached to the trigger portion so that it is turned on (contact) simultaneously with the operation of the trigger, or the interlock switch 5B is turned on (contact) first with respect to the operation of the trigger portion, and the linkage start switch after a predetermined time has elapsed. The trigger portion described above may be shifted and provided so that 5A is turned on (contacted).
  Thus, it is possible to obtain the link activation means 5 that does not require the activation timer 5C, and it is possible to simplify the entire system.
[0132]
  Moreover, in each said embodiment, although what used the material for plastic as the to-be-coated object 1 was illustrated, another insulator may be sufficient. Further, the object to be coated 1 may be a metal member as long as the surface is provided with an insulating film. Furthermore, in each of the above-described embodiments, the case where the ejection timing of the static elimination ions is set at the same time as or before the spraying of the spray paint is exemplified. However, the spray paint and the static elimination ions are constant with respect to the workpiece 1. It is important to inject continuously for a period of time, and the timing of each injection timing of both of them is, for example, that the injection of ion for discharging (start of the discharging operation process) is performed more than the injection of spray paint (paint spraying process) You may delay.
  Even if it does in this way, compared with the case where the discharge timing of the ion for discharging the static electricity is set before the spray of the spray paint, the function of eliminating dust adhesion is reduced, but it is still compared with the case where the discharging ion is not injected. Thus, dust can be effectively removed.
  In this case, when implementing such a case, in the first embodiment described above (see FIG. 2), another timer is newly connected between the interlocking switch 5B and the ion ejection means 4 for static elimination, By setting the predetermined delay time and setting the delay time of the timer 5C described above to, for example, zero, it is possible to delay the discharge of the ion for removing static electricity from the spray of the spray paint.
  In this case, if the discharge of the ion for discharging is carried out in parallel with the discharge of the discharging ion during the dust removing process until just before the start of spraying of the spray paint, the operation is almost equivalent to that of the invention according to each of the claims described above. An effect can be obtained.
[0133]
【The invention's effect】
  Since the present invention is configured and functions as described above, according to each of the first to fifth aspects of the present invention, the neutralizing operation is performed on the object to be coated during the paint spraying process in which the spray paint is sprayed on the object to be coated. Since a certain static elimination work process is performed simultaneously, it is possible to effectively eliminate the ions generated during the paint spraying process from adhering to the surrounding dust and adhering to the object to be coated. It is possible to provide an unprecedented superior surface coating method that can greatly improve the quality of the finished surface in painting.
[0134]
  Claim 6 thru | or12In each described invention, it is configured and functions as described above. According to this, according to this, the spray gun for painting and the ion spraying means for static elimination are made almost simultaneously or preceded by ion spraying on the same object to be coated. Since it is configured so that these operations can continue for a predetermined time, ions generated during spraying of paint on the object to be coated adhere to the surrounding dust as in the case of the method invention described above. It is possible to effectively eliminate the adherence to the object with the ion for discharging, which is output from the ion injection means for discharging, and this greatly improves the quality of the finished surface in the surface coating for the object such as plastic. As a result, the expensive clean room that was required in the past is no longer necessary, and in this respect, the capital investment for surface coating can be greatly reduced. It is possible to provide an excellent surface coating device not conventionally called.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a first embodiment of the present invention.
FIG. 2 is a block diagram showing an operation control system of the first embodiment disclosed in FIG. 1;
FIG. 3 is a schematic plan view showing a second embodiment of the present invention.
FIG. 4 is a schematic plan view showing a third embodiment of the present invention.
FIG. 5 is a schematic plan view showing a fourth embodiment of the present invention.
FIG. 6 is a schematic plan view showing a fifth embodiment of the present invention.
FIG. 7 is a schematic plan view showing a sixth embodiment of the present invention.
FIG. 8 is a schematic plan view showing a seventh embodiment of the present invention.
9A and 9B are views showing an eighth embodiment of the present invention, in which FIG. 9A is a schematic explanatory view, and FIG. 9B is a schematic plan view of FIG. 9A.
FIG. 10 is a block diagram showing an operation control system of an eighth embodiment disclosed in FIG. 9;
11A and 11B are diagrams showing a ninth embodiment of the present invention, FIG. 11A being a schematic explanatory view, and FIG. 11B being a schematic plan view of FIG. 11A.
[Explanation of symbols]
  1 Object to be painted
  2 Air output means for dust removal
  3 Paint spraying means
  3A spray gun for painting
  4 Ion injection means for static elimination
  4G ion generation means for static elimination
  5,21G linkage starter
  6 Stand for the object to be painted
  16, 17, 18 Breathable guide filter
  105 booth
  A Direction of rotation of workpiece
  B Air flow for dust removal
  S Painting area

Claims (12)

A dust removing process for blowing dust removing air onto the surface of an object to be painted such as plastic, a paint spraying process for spraying a sprayed paint onto the surface of the object to be coated at a predetermined timing after the dust removing process, and this paint spraying process In a surface coating method comprising a drying process for drying the object to be coated after painting,
With operating the paint spraying process and simultaneously providing a charge removing working process of neutralizing the surface of the predetermined ion of the object to be coated, in this neutralization working process, opposed breathable guiding filters on both sides of the object to be coated In addition, a clean air flow for dust removal that flows from one side to the other with respect to the object to be coated is provided inside the air-permeable guide filter, and the ions are directly coated in the clean air flow. Spraying toward the object to form a flow of ion for discharging along the clean air flow at least around the object to be coated, and the paint spraying step is a surface of the object to be coated by the discharging operation step. The surface coating method is characterized in that the coating is performed by spraying paint from the outside to the inside of the air-permeable guide filter at the same time while removing electricity. A dust removing process for blowing dust removing air onto the surface of an object to be painted such as plastic, a paint spraying process for spraying a sprayed paint onto the surface of the object to be coated at a predetermined timing after the dust removing process, and this paint spraying process In a surface coating method comprising a drying process for drying the object to be coated after painting,
Providing a charge eliminating work step that operates prior to the start of the paint spraying process to remove the surface of the object to be coated with predetermined ions, and continues to operate the charge eliminating work process after the start of the paint spraying process; and In this static elimination work process, a breathable guide filter is disposed oppositely on both sides of the object to be coated, and a dust-cleaning cleaner that flows from one side to the other with respect to the object to be coated is surrounded by the breathable guide filter. An air flow is provided, and in the clean air flow, the ions are directly sprayed toward the object to be coated, and at least the periphery of the object to be formed forms a flow of ions for discharging along the clean air flow. In the paint spraying step, the paint is sprayed simultaneously from the outside to the inside of the air-permeable guide filter while discharging the surface of the object to be coated by the static eliminating operation step. Surface coating method is characterized in that so as to perform. In the surface coating method according to claim 1 or 2,
In the static elimination work step, ions for static elimination are jetted onto the object to be coated from a direction inclined by a predetermined angle within 90 ° with respect to the air flow with respect to the position of the object to be painted. Surface coating method. A dust removing process for blowing dust removing air onto the surface of an object to be painted such as plastic, a paint spraying process for spraying a sprayed paint onto the surface of the object to be coated at a predetermined timing after the dust removing process, and this paint spraying process In a surface coating method comprising a drying process for drying the object to be coated after painting,
With operating the paint spraying process and simultaneously providing a charge removing working process of neutralizing the surface of the predetermined ion of the object to be coated, in this neutralization working process, opposed breathable guiding filters on both sides of the object to be coated In addition, a clean air flow for dust removal that flows from one side to the other with respect to the object to be coated is provided inside the air-permeable guide filter, and the ions are directly coated in the clean air flow. Spraying toward the object to form a flow of ion for discharging along the clean air flow at least around the object to be coated, and the paint spraying step is in the same direction as the flow direction of the clean air The surface coating method is characterized in that the surface of the object to be coated is discharged at the same time while discharging the surface of the object to be discharged by the step of removing electricity. A dust removing process for blowing dust removing air onto the surface of an object to be painted such as plastic, a paint spraying process for spraying a sprayed paint onto the surface of the object to be coated at a predetermined timing after the dust removing process, and this paint spraying process In a surface coating method comprising a drying process for drying the object to be coated after painting,
With operating the paint spraying process and simultaneously providing a charge removing working process of neutralizing the surface of the predetermined ion of the object to be coated, in this neutralization working process, opposed breathable guiding filters on both sides of the object to be coated In addition, a clean air flow for dust removal that flows from one side to the other with respect to the object to be coated is provided inside the air-permeable guide filter, and in the clean air stream, the ions are moved to the object to be coated. Directly spraying toward the object to form a flow of ion for discharging along the clean air flow at least around the object to be coated. A surface coating method characterized in that an angle formed by a flow of paint and the clean air flow is set to a predetermined angle of 90 ° or less and blown out from the same position. Paint spraying means for spraying spray-like paint on the object to be coated such as dust-removed plastic, and ion for discharging to be sprayed on the surface of the object to be sprayed directly attached to the paint spraying means. An injection means, a booth for sucking and discharging spray paint sprayed and diffused by the paint spraying means, and a breathable guide filter disposed opposite to both sides of the ionization means for discharging and extending toward the booth With
In conjunction with the operation of the paint spraying means, a linkage activation means for operating the ionization ion ejection means for discharging is provided in the paint spraying means, and the ionization means for static elimination is used for discharging static electricity directly on the object to be coated. shall have an output adjusting mechanism for adjusting the amount of such positive ions and negative ions, prior Symbol paint spraying means, a surface coating apparatus, characterized in that arranged outside of the breathable guide filter disposed opposite. Paint spraying means for spraying spray-like paint on the object to be coated such as dust-removed plastic, and ion for discharging to be sprayed on the surface of the object to be sprayed directly attached to the paint spraying means. An injection means, a booth for sucking and discharging spray paint sprayed and diffused by the paint spraying means, and a breathable guide filter disposed opposite to both sides of the ionization means for discharging and extending toward the booth With
In conjunction with the operation of the paint spraying means, a linkage starting means for operating the ionization ejecting means for static elimination is provided in the paint spraying means, and on the opposite side of the booth with the ion jetting means for static elimination interposed therebetween. A dust removal air output means for blowing dust removal air through the air-permeable guide filters arranged and directed toward the object to be coated is provided, and the ion ejection means for discharging is directly discharged to the object to be painted. of positive ions and assumed to have an output adjusting mechanism for adjusting the amount of negative ions such as, pre-Symbol paint spraying means, a surface coating apparatus, characterized in that arranged outside of the breathable guide filter disposed opposite . In the surface coating apparatus according to claim 6 or 7,
The surface coating apparatus according to claim 1, wherein the linkage activation unit has a priority operation setting function that causes the operation of the ion-ejecting unit for discharging to precede the operation of the paint spraying unit. In the surface coating apparatus as described in any one of Claims 7 thru | or 9,
A surface coating apparatus, wherein the dust removal air output means is a dust removal air jet having portability. In the surface coating apparatus as described in any one of Claims 7 thru | or 9,
The surface coating apparatus according to claim 1, wherein the dust removal air output means is a dust removal air output machine that covers the entire object to be coated and has an output portion of the dust removal air flow formed in a planar shape. In the surface coating apparatus as described in any one of Claims 7 thru | or 9,
The ionization means for discharging is provided alongside the air output means for dust removal so that the ion flow output from the ion discharging means for discharging is in the same direction as the air for dust removal output from the air output means for dust removal. Special surface coating equipment. In the surface coating apparatus as described in any one of Claims 7 thru | or 9,
The ion flow output from the ion-ejecting means for discharging and the air flow output from the air-output means for dust removal are output from different directions within 90 ° and intersect in the region of the object to be coated. A surface coating apparatus characterized in that an ion-injecting means for static elimination is provided along with an air output means for dust removal.

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