JP4834804B2 - Manufacturing method of spraying device - Google Patents

Description

  The present invention relates to a spraying device used for spraying and applying a paint to an object to be coated and a method for manufacturing the same. More specifically, the present invention is a lightweight and easy-to-clean spray device that sprays or sprays various liquids such as water, adhesives, rust preventives, insulating agents, coating agents, and chemicals as well as paints. About.

  As a conventional spray device, a rotary atomizing type coating device will be exemplified and described based on FIGS. 7 to 10 (for example, refer to Patent Document 1). As shown in FIG. 7, the rotary atomizing coating apparatus 101 includes a handle part 110, an operation adjustment part 112 positioned above the handle part 110, and a spray radiation part 114 located at the front end of the operation adjustment part 112. Consists of.

  The handle 110 adjusts the pressure of the high-pressure air used in the rotary atomizing coating apparatus 101 and the air pipe connector 124 for attaching the high-pressure air pipe 122 communicated with the compressor (not shown) to the lower end of the handle member 120. An air adjustment knob 126 is provided. As shown in FIG. 10, the air adjustment knob 126 displaces the first valve adjustment member 129 of the first valve 128 provided in the high-pressure air passage 127 that communicates with the air pipe connector 124, thereby opening and closing the first valve 128. Adjust.

The operation adjustment unit 112 has a paint pipe connector 140 for attaching a gun body 130, a trigger lever 134 pivotally supporting a cam lever 132, a hook 136, and a paint supply pipe 138 connected to a paint tank (not shown) at the center. Have The cam lever 132 is biased to rotate clockwise in FIG. 7 by the spring member 133.
As shown in FIG. 10, the trigger lever 134 is pivotally supported on the gun body 130 by a trigger lever fulcrum member 135. The second valve connecting member 150 of the second valve 137 disposed on the downstream side of the first valve 128 in the high-pressure air passage 127 is in contact with the intermediate portion of the trigger lever 134. The second valve 137 has a compression spring 139 and urges the trigger lever 134 to swing forward. The second valve 137 is adjusted in its open / closed state by displacing the second valve adjusting member 151 by the second valve connecting member 150.

In the half-pull state of the trigger lever 134 shown in FIG. 7, high-pressure air is supplied to an air motor (not shown), and the bell 206 is rotated. The half pulling state of the trigger lever 134 is locked when the intermediate step portion 148 of the cam 132C of the cam lever 132 is engaged with the cam pin 149 fixed to the gun body 130.
In the fully pulled state of the trigger lever 134 shown in FIG. 8, high-pressure air is supplied to rotate the bell 206, and paint is supplied to atomize and spray from the bell 206. The full pulling state of the trigger lever 134 for spraying the paint is formed by pulling the trigger lever 134 against the biasing force of the second valve connecting member 150 and engaging the cam pin 149 with the front end 152 of the cam 132C. The By adjusting the trigger lever 134 so that the cam pin 149 is positioned between the intermediate step portion 148 and the front end portion 152 of the cam 132C, the spray amount of the paint can be adjusted.

  To bring the trigger lever 134 into the released state, that is, the rest position (home position), in the half-drawn state of the trigger lever 134 shown in FIG. 7, the cam lever 132 is moved clockwise by pushing the operation protrusion 160 of the cam lever 134 with the thumb of the operator. Rotate in the direction. Accordingly, the cam pin 149 moves from the intermediate stage upper portion 162 of the cam 132C to the rear end portion 164, and the trigger lever 134 in which the cam lever 132 is not restrained is in the released state shown in FIG.

A paint discharge amount adjusting knob 170 and a shaping air adjusting knob 172 are provided on the upper rear portion of the operation adjusting unit 112. As shown in FIG. 10, the paint discharge amount adjusting knob 170 changes the positional relationship between the third adjustment valve member 178 of the third valve 176 disposed in the paint passage 174 communicating with the paint pipe connector 140 and the trigger lever 134. . Accordingly, by rotating the paint discharge amount adjusting knob 170, it is possible to adjust the supply amount of the paint with the trigger lever 134 pulled, that is, the spray amount.
The shaping air adjusting knob 172 adjusts the open / close state of the fourth valve 180 by displacing the fourth adjusting valve member 182 of the fourth valve 180 disposed on the downstream side of the second valve 137 of the high-pressure air passage 127. .

  The handle 110 made of the handle member 120 and the gun body 130 is made of aluminum die cast, but one made of aluminum die cast and hard plastic has also been proposed (see, for example, Patent Documents 2 and 3). In some cases, the gun body is molded or machined from steel, steel alloys, or other structurally rigid materials (see, for example, Patent Document 4). In addition, the Gambobody has been proposed that is formed entirely of synthetic resin (see, for example, Patent Documents 5 and 6) and that is formed of an electrically insulating material for rotary atomizing electrostatic coating (see, for example, Patent Document 7). ing.

  On the other hand, a configuration in which a fluororesin coat is applied to the body of an aluminum die cast spray gun has been proposed (see, for example, Patent Document 8).

JP 2004-321844 A JP-A-6-190310 JP-A-7-27549 Japanese National Patent Publication No. 9-511687 JP 2006-43593 A JP-T-2002-523214 JP-A-7-70557 JP-A-7-275747

In the conventional hand-held spraying device described above, even if it is an aluminum die-cast body, there is a problem that the weight is still heavy, the burden on the coating operator is heavy, and it is difficult to perform precise coating for a long time. An apparatus was desired. On the other hand, a synthetic resin body is lightweight, but its chemical and mechanical durability is low, and it is unsuitable as an industrial device under conditions where it can be used for a long time under severe conditions and further washed repeatedly.
Further, in the case of a conventional aluminum spray body, after die casting, the surface of the molded product needs to be polished with a buff or the like. In this polishing treatment, the corners of the molded product were deformed into rounded ones, and a design-preferable surface could not be obtained, and the degree of freedom in design was small.

(Object of invention)
The present invention has been made in view of the above-mentioned problems of the conventional spraying device, and has a spray body that can be precision cast-molded and solves general casting problems such as shrinkage and bubble generation. An object of the present invention is to provide a lightweight spraying device and a method for manufacturing the same.
Another object of the present invention is to provide a spraying device that has high chemical and mechanical durability, is easy to clean, and can be used in an optimum state for a long period of time, and a method for manufacturing the same.
Further, the present invention does not require a polishing process such as buffing on the surface of the molded article after die-casting as in a conventional spray body made of aluminum, and the surface can be provided with embossing or sharp corners. It is an object of the present invention to provide a spraying device having a high degree of design freedom as well as technical and a manufacturing method thereof.

  A first invention is a spray device having a magnesium spray body in which a spray part and a handle part are formed, and a first slide pin is provided in a region where the spray part and the handle part intersect in a mold of the magnesium spray body. A spraying device, characterized in that a product gate is provided around the first slide pin, the surface of the magnesium spray body is anodized, primer coated thereon, and further fluorocarbon coated. is there.

  2nd invention is a manufacturing method of the spraying apparatus which has a magnesium spray body which formed the spray part and the handle part, and is in the field where the spray part and the handle part in the mold of the magnesium spray body cross in the 1st A spray device comprising a slide pin, a product gate around the first slide pin, anodizing the surface of the magnesium spray body, primer coating, and further fluorocarbon coating It is a manufacturing method.

According to the spraying apparatus and the manufacturing method thereof of the present invention, the effect of constituting a lightweight spraying apparatus having a spray body that can be precision cast-molded and solves general casting problems such as shrinkage and foam generation is obtained. be able to. It was confirmed that the hand sprayer having substantially the same configuration was 505 grams when the spray body was formed of aluminum and 395 grams when formed of magnesium. Similarly, it was confirmed that a hand sprayer having substantially the same configuration was 295 grams when the spray body was formed of aluminum and 245 grams when formed of magnesium.
According to the spraying device and the manufacturing method thereof of the present invention, the effect of constituting a spraying device that has high chemical and mechanical durability, can be easily cleaned, and can be used in an optimum state for a long period of time. Obtainable.
Further, the present invention does not require a polishing process such as buffing on the surface of the molded article after die-casting as in the conventional aluminum spray body. This is advantageous not only in technology but also in design freedom.

A paint spraying apparatus and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the paint spraying apparatus according to the embodiment of the present invention includes a generally U-shaped spray body part 10, a head part 12 provided at the front end of the spray body part 10, and a spray body part 10. A trigger lever 14 swingably attached to the middle part, an atomization pattern opening adjustment knob 16 and a paint discharge amount adjustment knob 18 attached to the middle part of the spray body part 10, and a rear lower part of the spray body part 10. A pressurized air adjustment knob 20 and a pressurized air supply port 22 are provided. As shown in FIG. 2, the spray body unit 10 is also provided with a paint supply port 24 on the front left side. The spray body 10 is further provided with a hook portion 26 for suspending the paint spraying device 10 on the front upper surface, and a grip receiving recess 30 for receiving the oscillating trigger lever 14 in the lower grip portion 28. Is provided.

  As shown in FIG. 3, the head portion 12 has a paint discharge hole 40 at the center, two pairs of atomizing air discharge holes 42, 43, 44, 45 on the outside, and angular projections on the outside as seen from the front. Two pairs of atomization pattern opening air discharge holes 50, 51, 52 and 53 provided in 46 and 47 are provided.

  The flow rate of the pressurized air supplied from the pressurized air supply port 22 is adjusted as appropriate by the pressurized air adjustment knob 20, and the atomizing air discharge holes 42, 43, 44, 45 and the atomization pattern opening air discharge hole 50. , 51, 52, 53. The atomization pattern opening adjustment knob 16 adjusts the flow rate and pressure of pressurized air supplied from the pressurized air supply port 22 and discharged from the atomization pattern opening air discharge holes 50, 51, 52, and 53. Adjust the opening state of the atomization pattern. The trigger lever 14 cooperates with the paint discharge amount adjusting knob 18 to adjust the discharge amount of the paint supplied from the paint supply port 24 and stop the discharge.

  The spray body 10 is manufactured by casting magnesium or a magnesium alloy. As shown in FIG. 4, the spray body unit 10 includes a cast spray body unit 10 </ b> C, a molten magnesium casting mold gate 60, a vacuum chamber 62 for allowing molten magnesium to flow entirely including a thin portion of the casting mold, Head portion sump 64 for preventing “squeezing” due to the influence of dust and the like in the casting mold and generation of voids, atomization pattern opening adjustment knob head portion sump 65, pressurized air supply port sump 66, hook portion It is cast by a casting mold (not shown) that forms the hot water pool 67.

The vacuum chamber 62 is connected to a head portion slide pin hole 70, a pressurized air adjustment knob slide pin hole 73, a pressurized air supply port slide pin hole 74, and a grip receiving protrusion 77 provided below the grip receiving recess 30. ing.
In FIG. 4, in order to show the head portion slide pin hole 70, the pressurized air adjustment knob slide pin hole 73, and the pressurized air supply port slide pin hole 74 in an easily understandable manner, a grip portion 28 and a hook portion described later are shown. 26 and the display of the textured surface in the left and right substantially flat portions are omitted.

  The casting spray body portion 10 </ b> C is provided with a head portion slide pin hole 70 formed by a so-called slide pin (not shown) in the region of the head portion 12. Similarly, an atomization pattern opening adjustment knob slide pin hole 71 is provided in the area of the atomization pattern opening adjustment knob 16. Similarly, a paint discharge amount adjustment knob slide pin hole 72 is provided in the region of the paint discharge amount adjustment knob 18. Similarly, a pressurized air adjusting knob slide pin hole 73 is provided in the area of the pressurized air adjusting knob 20. Similarly, a pressurized air supply port slide pin hole 74 is provided in the region of the pressurized air supply port 22. A head portion slide pin hole 70, an atomization pattern opening adjustment knob slide pin hole 71, a paint discharge amount adjustment knob slide pin hole 72, a pressurized air adjustment knob slide pin hole 73, and a pressurized air supply port slide pin hole 74 are formed. The slide pin (not shown) of the molding die for sliding slides in a direction parallel to the paper surface of FIG. 4, that is, in a direction perpendicular to the paper surface of FIG.

As shown in FIG. 4, the molded product gate 80 connected to the casting mold gate 60 by the hot water flow path 61 is formed around the entire periphery of the paint discharge amount adjusting knob slide pin hole 72. However, the molded product gate 80 connected to the casting mold gate 60 by the hot water flow path 62 does not have to be formed around the entire circumference of the paint discharge amount adjusting knob slide pin hole 72, and has an appropriate angular region such as a half circumference. It is possible.
The vacuum chamber 62 is connected to the left half of the head portion slide pin hole 70, the atomization pattern opening adjustment knob slide pin hole 71, and the pressurized air adjustment knob slide pin hole 73. The connecting part to the head portion slide pin hole 70, the atomization pattern opening adjustment knob slide pin hole 71, and the pressurized air adjustment knob slide pin hole 73 of the vacuum chamber 62 is not limited to the left half circumference, and the mold is manufactured. In consideration of cost and the like, other angle regions may be used.

The head portion sump 64, the atomization pattern opening adjustment knob sump 65, and the pressurized air supply port hot water sump 66 are a head portion slide pin hole 70, an atomization pattern opening adjustment knob slide pin hole 71, and a pressurized air supply. It is connected to the left half of the mouth slide pin hole 74. The hook hot spring 67 is connected to the top of the hook portion 26. Head portion sump 64, atomization pattern opening adjustment knob sump 65, and head portion slide pin hole 70, atomization pattern opening adjustment knob slide pin hole 71, pressurized air supply port The connection to the slide pin hole 74 is not limited to the left half circumference, and can be set to another angle region in consideration of the manufacturing cost of the mold.
The grip portion 28, the hook portion 26, and the left and right substantially flat portions have a textured surface.

  As shown in FIG. 6, the casting spray body 10C includes a casting mold gate 60, a vacuum chamber 62, a head pool 64, an atomization pattern opening adjustment knob head pool 65, a pressurized air supply port pool 66, The hook hot spring 67 is cut off. Further, the entire surface of the casting spray body 10C is buffed to form the spray body 10.

  Next, the surface of the spray body 10 is anodized, a primer coating so-called undercoat layer is formed thereon, and a fluorocarbon coating is formed thereon. Primer coating enhances the adhesion of the fluorocarbon coating made thereon. The anodizing treatment of the magnesium surface is to protect magnesium from the property that magnesium is weak in salt and cannot be plated. The anodizing treatment of the magnesium surface is, for example, non-chromium anodizing treatment “anomag treatment” (trademark) provided by Hori Metal Surface Treatment Industry Co., Ltd. Non-chromium anodizing “anomag treatment” (trademark) improves adhesion to paints and has excellent anticorrosion and insulation properties, plus no heavy metals and enables magnesium recycling Garage. The primer coating has a thickness of 10 to 15 μm, and the fluorocarbon coating has a thickness of 30 ± 5 μm.

  The spraying apparatus according to the present invention is a lightweight and easy-to-clean spraying apparatus that sprays or sprays various liquids such as water, adhesives, rust preventives, insulating agents, coating agents, and chemicals as well as paints. Can be used as Such a spraying apparatus of the present invention can also be effectively used for a fixed nozzle atomizing type coating apparatus and a rotary atomizing type coating apparatus.

It is a right view of the paint spraying apparatus of one embodiment of this invention. It is sectional drawing along line II-II of FIG. It is a front view of the paint spraying device of one embodiment of the present invention. It is a right view of the molded article of the casting spray body part of the coating material spray apparatus shown in FIG. It is a rear view of a molded article in the casting spray body part of the paint spraying apparatus shown in FIG. It is a right view of the state which removed the hot water pool and the burr | flash of the molded product of the casting spray body part of the coating material spray apparatus shown in FIG. It is a right view of the half pulling state of the trigger lever of the conventional rotary spraying apparatus. It is a right view of the full pulling state of the trigger lever of the rotary spraying apparatus of FIG. It is a right view of the open state of the trigger lever of the rotary spraying apparatus of FIG. It is a vertical sectional view of the handle part and the operation adjustment part of the rotary spraying apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Spray body part 10C Casting spray body part 12 Head part 14 Trigger lever 16 Atomization pattern opening adjustment knob 18 Paint discharge amount adjustment knob 20 Pressurized air adjustment knob 22 Pressurized air supply port 24 Paint supply port 26 Hook part 28 Grip part 30 Grip receiving recess 40 Paint discharge holes 42, 43, 44, 45 Atomized air discharge holes 46, 47 Square projections 50, 51, 52, 53 Atomized pattern opening air discharge holes 60 Casting mold gate 62 Vacuum chamber 64 Head Hot water reservoir 65 Atomization pattern opening adjustment knob Hot water reservoir 66 Pressurized air supply port hot water retainer 67 Hook hot water pool 70 Head portion slide pin hole 73 Pressurized air adjustment knob slide pin hole 74 Pressurized air supply port slide pin Hole 77 Grip receiving protrusion

Claims (1)

  A method of manufacturing a spray device having a magnesium spray body having a spray portion and a handle portion, wherein a first slide pin is provided in a region where the spray portion and the handle portion of the magnesium spray body intersect, A method for producing a spraying device, comprising: providing a product gate around the first slide pin; anodizing the surface of the magnesium spray body; primer coating on the surface; and further fluorocarbon coating.

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