JP6946208B2 - Coating device - Google Patents

Description

The present invention relates to a coating device.

In this type of coating apparatus, conventionally, a method of masking without using consumables such as masking tape and a method of forming a coating film having a uniform film thickness have been studied.

As a method of masking without using consumables such as masking tape, for example, as shown in Patent Document 1, when spraying paint toward the outer surface of a rotating tube (work), a nozzle of a painting device A method of forming an air curtain that blocks the flow of paint from the to work is disclosed.

Further, as a method of forming a coating film having a uniform film thickness, for example, as shown in Patent Document 2, a plurality of spray guns are reciprocated to spray a chemical solution on a plate glass (work) surface that moves at a high temperature. Disclosed is a method of forcibly exhausting an excess chemical mist that causes uneven film thickness between adjacent spray guns by an exhaust duct.

Japanese Unexamined Patent Publication No. 2016-59892 Japanese Unexamined Patent Publication No. 2001-261373

However, although the methods described in Patent Document 1 and Patent Document 2 can form a coating film having a uniform film thickness by masking with air or forced exhaust of excess chemical mist, both of them are masking with air. It is not possible to form a coating film having a uniform film thickness.

The present invention has been made in view of this point, and an object of the present invention is to enable masking without using consumables such as masking tape and to form a coating film having a uniform film thickness. To do.

The first invention is a coating device, which is a receiving jig for receiving a work, and a sprayer for applying the liquid to the coated surface by atomizing and ejecting the liquid toward the coated surface of the work. By supplying a gas between the receiving jig and the non-coated surface of the work, the supply means for flowing the gas along the non-coated surface and the receiving means for flowing the gas along the non-coated surface of the work. A changing means for changing the direction of the flow of gas flowing out from between the jig and the non-coated surface toward one side in a predetermined direction, and allowing the gas to flow toward the other side in a predetermined direction along the coated surface of the work. It is characterized by having and.

In the first invention, since the gas supplied between the receiving jig and the non-coated surface of the work by the supplying means flows along the non-coated surface, the mist-like liquid ejected by the atomizer flows to the non-coated surface. Intrusion can be suppressed. Therefore, it is possible to mask the non-coated surface with gas.

Further, by the changing means, the direction of the flow of the gas flowing out from between the receiving jig and the non-coated surface toward one side in a predetermined direction is changed, and the gas is directed to the other side in a predetermined direction along the coated surface of the work. Therefore, it is possible to form a coating film having a uniform film thickness.

Therefore, according to the first invention, masking can be performed without using consumables such as masking tape, and a coating film having a uniform film thickness can be formed.

In the second invention, in the first invention, the changing means is provided on the other side of the work received by the receiving jig in a predetermined direction, and is predetermined from between the receiving jig and the non-coated surface. It is characterized in that the gas flowing out toward one side in a predetermined direction is sucked toward the other side in a predetermined direction.

In the second invention, the gas flowing out from between the receiving jig and the non-coated surface of the work toward one side in the predetermined direction is sucked toward the other side in the predetermined direction by the changing means, so that the gas is applied to the work. It flows along the surface in a predetermined direction toward the other side. Therefore, the formation of a coating film having a uniform film thickness is more reliable.

According to a third aspect of the present invention, in the first or second invention, the receiving jig has a horizontal receiving surface for receiving the work, and the non-coated surface of the work has a bottom surface of the work. The receiving surface of the receiving jig is characterized in that an outlet is formed between the receiving surface and the bottom surface of the work to blow out the gas supplied from the supply means.

In the third invention, the gas blown out from the outlet between the receiving surface of the receiving jig and the bottom surface of the work flows along the bottom surface of the work, thereby suppressing the liquid from entering the bottom surface. Since it can be done, masking of the bottom surface becomes more reliable.

A fourth aspect of the present invention is the third invention, wherein the non-coated surface of the work has an outer peripheral surface of the work in addition to the bottom surface of the work, and the receiving surface of the receiving jig is the receiving surface of the work. A recess for accommodating the work is formed so as to leave a gap between the work and the outer peripheral surface, and the outlet is formed on the bottom surface of the recess.

In the fourth invention, the gas blown out from the outlet flows between the bottom surface of the recess and the bottom surface of the work along the bottom surface of the work, and from the gap between the inner peripheral surface of the recess and the outer peripheral surface of the work. By flowing out, it is possible to prevent the liquid from entering the gap, so that it is possible to mask not only the bottom surface of the work but also the outer peripheral surface thereof.

A fifth aspect of the present invention is the fourth aspect of the present invention, wherein the atomizer has an outlet for ejecting the liquid, and the receiver is provided so that the central axis of the ejector is orthogonal to the receiving surface of the receiving jig. It is characterized in that it is provided on the upper side of the work received by the surface.

In the fifth invention, since the atomizer is provided on the upper side of the work received by the receiving surface so that the central axis of the ejection port is orthogonal to the receiving surface of the receiving jig, the direction in which the liquid is ejected by the atomizer. And the direction in which the gas flows out from the gap between the inner peripheral surface of the recess and the outer peripheral surface of the work faces each other. As a result, it is possible to further suppress the liquid from entering the outer peripheral surface of the work through the gap, so that the masking of the outer peripheral surface becomes more reliable.

The sixth invention is characterized in that, in the fourth or fifth invention, a plurality of grooves extending radially from the outlet are formed on the bottom surface of the recess.

In the sixth invention, when the pressure of the supplied gas is low or the weight of the work is heavy, there is no gap between the bottom surface of the recess and the bottom surface of the work, and the gas is flowed along the bottom surface of the work. Gas flows in the groove even when it is difficult to flow. Then, the gas flowing in the groove flows out from the gap between the inner peripheral surface of the recess and the outer peripheral surface of the work, so that the liquid can be suppressed from entering the gap, so that the gas is supplied. It is possible to mask the bottom surface and the outer peripheral surface of the work regardless of the pressure of the gas and the weight of the work.

As described above, according to the present invention, when the liquid is applied to the coated surface of the work by the sprayer, the gas is supplied between the receiving jig and the non-coated surface of the work by the supply means. The gas flows along the coated surface and flows out from between the receiving jig and the non-coated surface toward one side in a predetermined direction by the changing means, and the direction of the flow is changed to change the direction of the flow to the other side in the predetermined direction along the coated surface. By flowing toward, masking can be performed without using consumables such as masking tape, and a coating film having a uniform film thickness can be formed.

It is a schematic partial sectional view which shows the use state of the coating apparatus which concerns on Embodiment 1 of this invention. It is a figure corresponding to FIG. 1 of the coating apparatus which concerns on Embodiment 2 of this invention. It is a schematic plan view which shows the groove formed in the bottom surface of the recess of the receiving jig in the coating apparatus which concerns on Embodiment 3 of this invention. It is a figure corresponding to FIG. 1 of the coating apparatus which concerns on Embodiment 4 of this invention. It is a figure corresponding to FIG. 1 of the coating apparatus which concerns on Embodiment 5 of this invention. It is a figure corresponding to FIG. 1 of the coating apparatus which concerns on Embodiment 6 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of preferred embodiments is merely exemplary and is not intended to limit the present invention, its applications or its uses.

(Embodiment 1)
FIG. 1 shows a usage state of the coating device A according to the first embodiment of the present invention. The coating device A is a device for applying the adhesive L (liquid) to the coated surface of the work W. As shown in FIG. 1, the work W is a metal or resin disk member having a circular opening (not shown) formed in the central portion. The coated surface of the work W is the surface (upper surface) 1a of the work W, and the non-coated surface thereof is the bottom surface 1b of the work W.

The coating device A includes a receiving jig 10 for receiving the work W, a coating gun 20 for discharging the adhesive L, a gas generator 30 (supply means) for supplying compressed air G (gas), and a flow of compressed air G. It has an exhaust device 40 (changing means) for changing the direction of the gas.

The receiving jig 10 has a receiving surface 11 as a horizontal upper surface for receiving the work W. The receiving surface 11 receives the work W so that the bottom surface 1b of the work W faces downward. At that time, for example, the screw portion 51 of the metal or resin bolt 50 is inserted into the central opening of the work W, and the head portion 52 thereof is placed on the surface 1a of the work W. As a result, the position of the work W is stabilized when the adhesive L is applied, and a coating film having a more uniform film thickness can be formed.

Further, in the portion of the receiving surface 11 of the receiving jig 10 corresponding to the central opening of the work W received by the receiving surface 11, the compressed air G supplied from the gas generator 30 and the bottom surface 1b of the work W A circular through hole 12 (outlet) extending in the vertical direction is formed between the two.

The coating gun 20 is a commonly used sprayer. The coating gun 20 has a spout 21 for ejecting the adhesive L. The coating gun 20 receives the work on the receiving surface 11 so that the central axis of the ejection port 21 intersects the receiving surface 11 of the receiving jig 10 (the surface 1a of the work W received on the receiving surface 11) at an angle. It is arranged diagonally above W (upper right side in FIG. 1). The coating gun 20 coats the adhesive L on the surface 1a of the work W by atomizing the adhesive L and ejecting the adhesive L from the ejection port 21 in a substantially conical shape. The alternate long and short dash line in FIG. 1 indicates the ejection region of the adhesive L ejected from the coating gun 20.

The gas generator 30 is not particularly limited, and is a generally used gas supply device. The gas generator 30 is connected to the through hole 12 of the receiving jig 10 via a pipe (not shown) or the like. Then, the compressed air G blown out from the through hole 12 of the receiving jig 10 by the gas generator 30 between the receiving surface 11 and the bottom surface 1b of the work W flows along the bottom surface 1b, whereby the adhesive is adhered. The infiltration of L into the bottom surface 1b is suppressed.

The pressure of the compressed air G supplied from the gas generator 30 is a ventilation path through which the compressed air G flows between the receiving surface 11 of the receiving jig 10 and the bottom surface 1b of the work W, as shown by the arrow shown in FIG. The work W is adjusted to float slightly with respect to the receiving surface 11 so as to form the work W.

Specifically, the coating gauge pressure of the adhesive L ejected from the coating gun 20 and the pressure gauge pressure on the bottom surface 1b of the work W by the compressed air G supplied from the gas generator 30 are substantially the same. Is adjusted so that.

For example, the weight of the work W is W (N), the cross-sectional area of the through hole 12 is S1 (mm ² ), the cross-sectional area of the screw portion 51 is S2 (mm ² ), and the coating gauge pressure of the adhesive L is PS (MPa). And, when the supply gauge pressure of the compressed air G supplied from the gas generator 30 is PA (MPa), the adhesive L is adjusted by adjusting the supply gauge pressure PA of the compressed air G to the pressure obtained by the following formula. The coating gauge pressure of No. 1 and the pressure gauge pressure applied to the bottom surface 1b of the work W by the compressed air G are adjusted to be substantially the same.
PA = {PS (S1-S2) + W} / S1

The exhaust device 40 is, for example, an exhaust fan that sucks gas. The exhaust device 40 is provided on the other side (left side in FIG. 1) of the work W received by the receiving jig 10 in a predetermined work radial direction (predetermined direction). Then, the compressed air G that flows along the bottom surface 1b of the work W and flows out from between the receiving jig 10 and the bottom surface 1b toward one side in the work diameter direction (right side in FIG. 1) is discharged by the exhaust device 40 to the work diameter. Sucked toward the other side in the direction, the direction of the flow is changed as shown by the arrow shown in FIG. 1, and the compressed air G flows toward the other side in the radial direction of the work along the surface 1a of the work W.

In this way, the flow direction of the compressed air G flowing out from between the receiving jig 10 and the work W toward one side in the work radial direction is reversed by the exhaust device 40 to the other side in the work radial direction, so that the work. A vortex (hereinafter referred to as "turbulent vortex") in which the adhesive L ejected from the coating gun 20 is in a turbulent state is formed in the vicinity of one side in the radial direction. Then, the adhesive L is agitated on the surface 1a of the work W by the turbulent vortex, and is uniformly applied on the surface 1a of the work W.

Further, when the work W slightly floats with respect to the receiving surface 11 of the receiving jig 10, the compressed air G whose flow direction is reversed by the exhaust device 40 hits the work W, so that the work W is automatically centered on the axis thereof. Rotate. Due to the rotation of the work W, the adhesive L is more evenly applied on the surface 1a of the work W.

From the above, according to the present embodiment, the compressed air G supplied between the receiving surface 11 of the receiving jig 10 and the bottom surface 1b of the work W by the gas generator 30 flows along the bottom surface 1b, so that the coating gun It is possible to prevent the mist-like adhesive L ejected by 20 from infiltrating the bottom surface 1b of the work W. Therefore, the bottom surface 1b of the work W can be masked by the compressed air G.

Further, the exhaust device 40 changes the direction of the flow of the compressed air G flowing out from between the receiving surface 11 of the receiving jig 10 and the bottom surface 1b of the work W toward one side in the work radial direction, and the compressed air G is changed. Since it flows toward the other side in the radial direction of the work along the surface 1a of the work W, it is possible to form a coating film having a uniform film thickness.

Therefore, the bottom surface 1b of the work W can be masked without using consumables such as masking tape, and a coating film having a uniform film thickness can be formed on the surface 1a.

Further, when the pressure of the compressed air G is adjusted to slightly float the work W with respect to the receiving surface 11 of the jig 10, the work W is centered on the axis by the exhaust device 40 without separately providing a rotating means. Can be rotated automatically. Therefore, it is possible to form a coating film having a more uniform film thickness with a simple structure.

(Embodiment 2)
In the present embodiment, the configuration of the non-coated surface of the work W, the configuration of the receiving jig 10, and the arrangement of the coating gun 20 are different from those of the first embodiment, but other points are the same as those of the first embodiment. be. Therefore, in the following description, duplicate description may be omitted for the same components as those of the first embodiment.

That is, in the present embodiment, the non-coated surfaces of the work W are the bottom surface 1b and the outer peripheral surface 1c of the work W. As shown in FIG. 2, the receiving surface 11 of the receiving jig 10 is formed with a circular recess 13 for accommodating the work W so as to leave a gap between the receiving jig 10 and the outer peripheral surface 1c of the work W. The recess 13 has a bottom surface 13a that receives the work W. The through hole 12 is formed in the central portion of the bottom surface 13a of the recess 13. The depth of the recess 13 is deeper than the thickness of the work W. The coating gun 20 is on the upper side of the central portion of the work W received by the receiving surface 11 (bottom surface 13a) so that the central axis of the ejection port 21 is orthogonal to the receiving surface 11 (bottom surface 13a of the recess 13) of the receiving jig 10. It is located in. Other configurations are the same as those in the first embodiment.

As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained. In particular, in the present embodiment, the compressed air G blown out from the through hole 12 flows between the bottom surface 13a of the recess 13 and the bottom surface 1b of the work W along the bottom surface 1b, and flows between the inner peripheral surface 13b of the recess 13 and the work. By flowing out from the gap between the outer peripheral surface 1c of W, it is possible to prevent the adhesive L from entering the gap, so that not only the bottom surface 1b of the work W but also the outer peripheral surface 1c can be masked. It will be possible.

Further, since the coating gun 20 is provided on the upper side of the work W received by the receiving surface 11 so that the central axis of the ejection port 21 is orthogonal to the receiving surface 11 of the receiving jig 10, the coating gun 20 is adhered by the coating gun 20. The direction in which the agent L is ejected and the direction in which the compressed air G flows out from the gap between the inner peripheral surface 13b of the recess 13 and the outer peripheral surface 1c of the work W face each other. As a result, it is possible to further prevent the adhesive L from infiltrating the outer peripheral surface 1c of the work W through the gap, so that the masking of the outer peripheral surface 1c becomes more reliable.

(Embodiment 3)
In the present embodiment, the configuration of the bottom surface 13a of the recess 13 is different from that of the second embodiment, but the configuration is the same as that of the second embodiment in other respects. Therefore, in the following description, duplicate description may be omitted for the same components as those of the second embodiment.

That is, in the present embodiment, as shown in FIG. 3, a plurality of (8 in FIG. 3) grooves 14, 14, ... Radiating from the through holes 12 are formed on the bottom surface 13a of the recess 13. These plurality of grooves 14, 14, ... Are provided at equal intervals in the circumferential direction of the recess 13. Each groove 14 extends to the outside in the radial direction of the outer peripheral edge of the work W housed in the recess 13. Other configurations are the same as those in the second embodiment.

As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained. In particular, in the present embodiment, when the pressure of the compressed air G supplied from the gas generator 30 is low or the weight of the work W is large, between the bottom surface 13a of the recess 13 and the bottom surface 1b of the work W. Even when there is no gap and it is difficult for the compressed air G to flow along the bottom surface 1b of the work W, the compressed air G flows in the grooves 14, 14, ....

Then, the compressed air G flowing in the grooves 14, 14, ... Flows along the outer peripheral edge of the work W and flows out from the gap between the inner peripheral surface 13b of the recess 13 and the outer peripheral surface 1c of the work W. As a result, it is possible to prevent the adhesive L from entering the gap, so that the bottom surface 1b and the outer peripheral surface 1c of the work W can be masked regardless of the pressure of the supplied compressed air G and the weight of the work W. It will be possible.

(Embodiment 4)
In this embodiment, the configuration of the work W and the configuration of the receiving jig 10 are mainly different from those of the first embodiment, but the other points are the same as those of the first embodiment. Therefore, in the following description, duplicate description may be omitted for the same components as those of the first embodiment.

That is, in the present embodiment, as shown in FIG. 4, the work W is a hollow cylindrical member made of metal or resin used for an anti-vibration bush or the like. The coated surfaces of the work W are the inner peripheral surface 2a and the upper end surface 2c of the work W, and the non-coated surfaces thereof are the outer peripheral surface 2b and the lower end surface 2d of the work W.

The receiving jig 10 has a receiving portion 15 and an accommodating portion 16. The receiving portion 15 is a hollow cylindrical member. The hollow portion 15b of the receiving portion 15 is a through hole in the vertical direction whose inner diameter is substantially the same as the inner diameter of the hollow portion 2 of the work W. The upper end surface 15c of the receiving portion 15 is a horizontal receiving surface that receives the work W. The accommodating portion 16 has a circular through hole 16a into which the work W and the receiving portion 15 are fitted so that a gap is provided between the outer peripheral surface 2b of the work W and the outer peripheral surface 15a of the receiving portion 15. It is formed. The outlet for blowing out the compressed air G is formed between the through hole 16a and the outer peripheral surface 15a of the receiving portion 15.

The coating gun 20 is arranged diagonally above the work W received by the receiving portion 15 (upper right side in FIG. 4) so that the central axis of the spout 21 intersects the axial direction of the work W at an angle. .. A plurality of coating guns 20 are provided for applying the adhesive L over the entire inner peripheral surface 2a of the work W (only one is shown in FIG. 4). The exhaust device 40 is provided on the other side (lower side in FIG. 4) in the axial direction (predetermined direction) of the work W. Other configurations are the same as those in the first embodiment.

In the coating device A configured as described above, the receiving portion 15 is fitted into the through hole 16a of the receiving jig 10 so that the axial direction faces in the vertical direction, and the axial direction of the work W is the axial direction of the receiving portion 15. Receive work W so that it is almost the same. Then, the compressed air G blown out from between the through hole 16a and the outer peripheral surface 15a of the receiving portion 15 by the gas generator 30 creates a gap between the through hole 16a and the outer peripheral surface 2b of the work W on the outer peripheral surface 2b. By flowing along the adhesive L, the adhesive L is suppressed from entering the gap.

Then, the compressed air G flowing out from the gap between the through hole 16a and the outer peripheral surface 2b of the work W toward one side in the work axial direction (upper side in FIG. 4) is directed to the other side in the work axial direction by the exhaust device 40. As shown by the arrow shown in FIG. 4, the direction of the flow is changed, and the compressed air G flows along the inner peripheral surface 2a of the work W toward the other side in a predetermined direction. At this time, the flow direction of the compressed air G flowing out from the gap between the through hole 16a and the outer peripheral surface 2b of the work W toward one side in the work axial direction is reversed by the exhaust device 40 to the other side in the work axial direction. As a result, as in the first embodiment, a turbulent vortex of the adhesive L ejected from the coating gun 20 is formed in the vicinity of one side in the work axial direction, and the turbulent vortex causes the adhesive L to form an inner peripheral surface of the work W. It is agitated on 2a and the upper end surface 2c.

As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained. That is, it is possible to mask the outer peripheral surface 2b of the work W and to form a coating film having a uniform film thickness on the inner peripheral surface 2a and the upper end surface 2c of the work W.

In particular, in the present embodiment, the flow direction of the compressed air G flowing out from the gap between the through hole 16a and the outer peripheral surface 2b of the work W toward one side in the work axial direction is directed to the other side in the work axial direction by the exhaust device 40. The inverted compressed air G flows along the inner peripheral surface 2a of the work W and flows in the hollow portion 15b of the receiving portion 15, so that the adhesive L is transferred to the lower end surface 2d of the work W and the upper end surface of the receiving portion 15. It is possible to suppress the invasion between the 15c and the 15c. Therefore, masking of the lower end surface 2d of the work W is also possible.

(Embodiment 5)
In this embodiment, the configuration of the work W and the configuration of the receiving jig 10 are mainly different from those of the first embodiment, but the other points are the same as those of the first embodiment. Therefore, in the following description, duplicate description may be omitted for the same components as those of the first embodiment.

That is, in the present embodiment, as shown in FIG. 5, the work W is a hollow cylindrical member made of metal or resin used for an anti-vibration bush or the like. The coated surface of the work W is the outer peripheral surface 2e of the work W, and the non-coated surfaces thereof are the inner peripheral surface 2f of the work W and the upper and lower end surfaces 2c and 2d.

The receiving jig 10 has an accommodating portion 17 and a fixing pin 18. The accommodating portion 17 is a hollow cylindrical member. The hollow portion of the accommodating portion 17 is a through hole 17a in the vertical direction whose inner diameter is substantially the same as the inner diameter of the hollow portion 2 of the work W. The fixing pin 18 is a cylindrical member whose outer diameter is smaller than the inner diameter of the hollow portion 2 of the work W and the inner diameter of the through hole 17a of the accommodating portion 17. The fixing pin 18 is fitted into the hollow portion 2 of the work W and the through hole 17a of the accommodating portion 17 so as to leave a gap between the inner peripheral surface 2f of the work W and the through hole 17a of the accommodating portion 17, respectively. There is. An elastic rubber 19 such as urethane rubber that comes into contact with the inner peripheral surface 2f of the work W and fixes the work W is projected outward in the radial direction on the outer peripheral surface of the fixing pin 18 near the upper end. The outlet for blowing out the compressed air G is formed between the through hole 17a of the accommodating portion 17 and the outer peripheral surface 18a of the fixing pin 18.

The coating gun 20 is provided on the radial outer side of the work W fixed by the fixing pin 18 so that the central axis of the ejection port 21 intersects the axial direction of the work W in an inclined manner. A plurality of coating guns 20 are provided in order to apply the adhesive L over the entire outer peripheral surface 2e of the work W (only one is shown in FIG. 5). The exhaust device 40 is provided on the other side (lower side in FIG. 5) in the axial direction (predetermined direction) of the work W. Other configurations are the same as those in the first embodiment.

In the coating device A configured as described above, the fixing pin 18 is fitted into the through hole 17a of the accommodating portion 17 so that the axial direction faces in the vertical direction, and the axial direction of the work W is the axial direction of the fixing pin 18. Receive work W so that it is almost the same as. Specifically, the elastic rubber 19 projecting from the fixing pin 18 is attached to the inner peripheral surface 2f of the work W so that there is a gap between the lower end surface 2d of the work W and the upper end surface 17b of the accommodating portion 17. The work W is fixed to the fixing pin 18 by abutting. Then, the compressed air G blown out from between the through hole 17a of the accommodating portion 17 and the outer peripheral surface 18a of the fixing pin 18 by the gas generator 30 is transferred to the outer peripheral surface 18a of the fixing pin 18 and the inner peripheral surface of the work W. By flowing along the inner peripheral surface 2f through the gap between the 2f and the adhesive L, the adhesive L is suppressed from entering the gap.

Then, the compressed air G flowing out from the gap between the outer peripheral surface 18a of the fixing pin 18 and the inner peripheral surface 2f of the work W toward one side (upper side in FIG. 5) in the work axial direction (predetermined direction) is exhausted. The device 40 sucks the work toward the other side in the work axis direction, changes the direction of the flow as shown by the arrow shown in FIG. 5, and the compressed air G is on the other side in the work axis direction along the outer peripheral surface 2e of the work W. Flow toward. At this time, the flow direction of the compressed air G flowing out from the gap between the outer peripheral surface 18a of the fixing pin 18 and the inner peripheral surface 2f of the work W toward one side in the work axial direction is the work axial direction by the exhaust device 40. By reversing to the other side, a turbulent vortex of the adhesive L ejected from the coating gun 20 is formed in the vicinity of one side in the work axial direction as in the first embodiment, and the adhesive L is generated by this turbulent vortex. It is stirred on the outer peripheral surface 2e of the work W.

As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained. That is, it is possible to mask the inner peripheral surface 2f of the work W and to form a coating film having a uniform film thickness on the outer peripheral surface 2e of the work W.

In particular, in the present embodiment, the flow direction of the compressed air G flowing out from the gap between the outer peripheral surface 18a of the fixing pin 18 and the inner peripheral surface 2f of the work W toward one side in the work axial direction is the exhaust device 40. By inverting to the other side in the work axis direction, it is possible to prevent the adhesive L from adhering to the upper end surface 2c of the work W. Further, the compressed air G blown out from between the through hole 17a of the accommodating portion 17 and the outer peripheral surface 18a of the fixing pin 18 is released from the gap between the lower end surface 2d of the work W and the upper end surface 17b of the accommodating portion 17. By flowing out, it is possible to prevent the adhesive L from entering the gap. Therefore, it is possible to mask the upper and lower end surfaces 2c and 2d of the work W.

In the present embodiment, the coating gun 20 is provided on the radial outer side of the work W fixed by the fixing pin 18 so that the central axis of the ejection port 21 is inclined and intersects the axial direction of the work W. However, it may be provided on the outer side in the radial direction of the work W so as to be orthogonal to the axial direction of the work W. In this case, the direction in which the adhesive L is ejected by the coating gun 20 is substantially parallel to the upper and lower end surfaces 2c and 2d of the work W, and the adhesive L is further suppressed from adhering to the upper and lower end surfaces 2c and 2d. Therefore, masking of the upper and lower end surfaces 2c and 2d becomes more reliable.

Further, in the present embodiment, the elastic rubber 19 is used to fix the work W, but instead, for example, an urging means for urging outward in the radial direction may be used.

(Embodiment 6)
In this embodiment, the configuration of the work W and the configuration of the receiving jig 10 are mainly different from those of the first embodiment, but the other points are the same as those of the first embodiment. Therefore, in the following description, duplicate description may be omitted for the same components as those of the first embodiment.

That is, in the present embodiment, as shown in FIG. 6, the work W is an inner core member made of metal or resin used for a liquid-filled engine mount or the like. The work W is projected downward from the central portion of the bottom surface 3a of the main body portion 3 so that the axial direction of the main body portion 3 having a substantially truncated cone shape substantially coincides with the axial direction of the main body portion 3, and is outside the bottom surface 3a. It has a substantially columnar shaft portion 4 having a small diameter. A circular hollow portion 5 that penetrates the main body portion 3 and the shaft portion 4 in the vertical direction is formed in the central portion of the main body portion 3 and the shaft portion 4. The coated surfaces of the work W are the bottom surface 3a, the outer peripheral surface 3b, and the upper surface 3c of the main body 3, and the non-coated surfaces thereof are the outer peripheral surface 4a of the shaft portion 4 and the inner peripheral surface of the hollow portion 5.

The shaft portion 4 is fitted into the through hole 12 of the receiving jig 10 so as to leave a gap between the shaft portion 4 and the outer peripheral surface 4a. An annular receiving portion 15 is formed on the peripheral edge of the upper end opening of the through hole 12 on the upper surface of the receiving jig 10. The upper end surface 15c of the receiving portion 15 is a horizontal receiving surface that receives the work W. A plurality of through holes 15d, 15d, ... That penetrate in the radial direction are formed in the receiving portion 15. Although detailed description will be omitted, the work W received by the receiving portion 15 rotates about the axis of the work W when the adhesive L is applied. By the rotation of the work W, the adhesive L is applied over the entire bottom surface 3a, the outer peripheral surface 3b, and the upper surface 3c of the main body 3.

The coating gun 20 is provided on the radial outer side of the work W received by the receiving portion 15 so that the central axis of the ejection port 21 intersects the axial direction of the work W in an inclined manner. The exhaust device 40 is provided on the other side (left side in FIG. 6) of the work W in a predetermined work radial direction (predetermined direction). Other configurations are the same as those in the first embodiment.

In the coating device A configured as described above, the shaft portion 4 is fitted into the through hole 12 of the receiving jig 10 so that the axial direction of the shaft portion 4 faces in the vertical direction, and the receiving portion 15 of the receiving jig 10 Receives the bottom surface 3a of the main body 3. Then, the compressed air G blown out from the through hole 12 by the gas generator 30 flows along the outer peripheral surface 4a through the gap between the through hole 12 and the outer peripheral surface 4a of the shaft portion 4, and the through hole of the receiving portion 15 By flowing out from 15d, 15d, ... toward the outer side in the radial direction, the adhesive L is suppressed from entering the through hole 12. Further, the compressed air G blown out from the through hole 12 also flows into the hollow portion 5 from the lower end opening 5a of the hollow portion 5 of the work W, and flows out from the upper end opening 5b toward the upper side, thereby causing the adhesive. It is suppressed that L penetrates into the hollow portion 5 of the work W.

Then, the compressed air G that flows out from the through holes 15d, 15d, ... Of the receiving portion 15 toward one side in the radial direction of the work (right side in FIG. 6) and the compressed air that flows out from the upper end opening 5b of the hollow portion 5 toward the upper side. G is sucked by the exhaust device 40 toward the other side in the radial direction of the work, the direction of the flow is changed as shown by the arrow shown in FIG. 6, and the compressed air G is applied along the outer peripheral surface 3b of the main body 3. It flows toward the other side in the radial direction of the work. At this time, the flow direction of the compressed air G flowing out from the through holes 15d, 15d, ... Of the receiving portion 15 toward one side in the work radial direction is reversed by the exhaust device 40 to the other side in the work radial direction. Similar to the first embodiment, a turbulent vortex of the adhesive L ejected from the coating gun 20 is formed in the vicinity of one side in the radial direction of the work. Further, according to the present embodiment, the flow direction of the compressed air G flowing upward from the upper end opening 5b of the hollow portion 5 is changed by 90 degrees to the other side in the work radial direction by the exhaust device 40, so that the upper end is formed. A turbulent vortex of the adhesive L ejected from the coating gun 20 is also formed in the vicinity of the opening 5b. Then, the adhesive L is stirred by these turbulent vortices on the bottom surface 3a, the outer peripheral surface 3b, and the upper surface 3c of the main body 3.

As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained. That is, the outer peripheral surface 4a of the shaft portion 4 and the inner peripheral surface of the hollow portion 5 can be masked, and a coating film having a uniform film thickness can be formed on the bottom surface 3a, the outer peripheral surface 3b, and the upper surface 3c of the main body portion 3. It will be possible.

In the present embodiment, through holes 15d, 15d, ... Are formed in the receiving portion 15, but instead, as in the first embodiment, the pressure of the compressed air G is adjusted to receive the work W. The compressed air G may flow out from the gap between the bottom surface 3a of the main body 3 and the upper end surface 15c of the receiving portion 15 by slightly floating with respect to 15. In this case, since the adhesive L is prevented from entering the through hole 12 through the gap, the outer peripheral surface 4a of the shaft portion 4 can be masked.

Further, in the present embodiment, when the adhesive L is applied, the work W rotates about its axis, but instead, the coating gun 20 may rotate about the axis of the work W. A plurality of coating guns 20 may be provided as in and 5.

(Other embodiments)
In each of the above embodiments, the adhesive L is used as the liquid, but a paint, other chemicals, or the like may be used.

In each of the above embodiments, compressed air G is used as the gas, but the gas does not have to be compressed. The type of gas is not particularly limited, and examples thereof include, in addition to air, an inert gas such as helium gas, argon gas, and nitrogen gas. Further, the temperature of the gas is not particularly limited and may be room temperature.

In each of the above embodiments, the exhaust device 40 is provided as the changing means, but instead, for example, a blower such as a spot cooler may be provided. This blower is provided on one side of the work W received by the receiving jig 10 in a predetermined direction, and is provided from between the receiving surface 11 of the receiving jig 10 and the non-coated surface of the work W toward one side in a predetermined direction. The outflowing compressed air G is blown toward the other side in a predetermined direction. However, the exhaust device 40 is preferable from the viewpoint of forming a coating film having a uniform film thickness.

In the first to third embodiments, the bolt 50 is used to stabilize the position of the work W, but when the position of the work W is stable without the bolt 50, the bolt 50 is not used. May be good.

In the third embodiment, the grooves 14, 14, ... Are formed on the bottom surface 13a of the recess 13, but may be formed directly on the receiving surface 11 as in the first embodiment. Further, when a coating film having a uniform film thickness is formed on the outer peripheral surface 1c without masking the outer peripheral surface 1c of the work W as in the second and third embodiments, the same as in the first embodiment. A disk-shaped convex portion (not shown) that receives the work W may be provided on the receiving surface 11 and may be formed on the surface of the convex portion.

In the fourth and fifth embodiments, from the viewpoint of forming a coating film having a uniform film thickness on the coated surface of the work W, the work W or the coating gun 20 is centered on the axis of the work W when the adhesive L is applied. It may rotate. In this case, there may be only one coating gun 20.

Hereinafter, the present invention will be described in more detail by way of examples. The following examples are exemplary and are not intended to limit the invention.

(Example 1)
A resin disk member was used as the work, and the device shown in FIG. 1 was used as the coating device. Specifically, as a receiving jig, a columnar metallic jig having a through hole (outlet) formed in the central portion and a receiving surface as a horizontal upper surface was produced. The work was received so that the bottom surface (non-coated surface) of the work was on the receiving surface of the produced receiving jig.

A coating gun [small spray gun manufactured by Anest Iwata Co., Ltd., type: W-101-101S] was received on the receiving surface so that the central axis of the spout intersected the receiving surface of the receiving jig at an angle. It was placed diagonally above the work.

The gas generator [compressor manufactured by Hitachi Industrial Equipment Systems Co., Ltd., model: OSP-37V6AR] and the through hole of the receiving jig are connected by a pipe, and the temperature is at room temperature (about 25 ° C) supplied from the gas generator. Compressed air is blown out from the through hole of the receiving jig between the receiving surface and the bottom surface of the work. At that time, the pressure of the adhesive coating gauge and the pressure of the compressed air supply gauge were adjusted to be substantially the same so that the work floated slightly with respect to the receiving surface of the receiving jig.

As an exhaust fan, a work received by a jig that receives a fan [manufactured by Teral Inc., nominal diameter: 400 mm] driven by a motor [manufactured by Mitsubishi Electric Corporation, model: AF-SER, output: 0.75 kW]. The compression is arranged on the other side (left side in FIG. 1) in the radial direction (predetermined direction) of the work, and flows out from between the receiving surface of the receiving jig and the bottom surface of the work toward one side in the radial direction of the work (right side in FIG. 1). Air was sucked toward the other side in the radial direction of the work.

Then, the adhesive was applied from the ejection port of the coating gun toward the surface (coating surface) of the work at a coating gauge pressure of 0.2 MPa for 5 minutes, and then the coating film was heated and dried. Using the obtained work, the masking property, the uniformity of the film thickness of the coating film, and the appearance of the coating film were evaluated by the following methods.

<Masking property>
The bottom surface (non-coated surface) of the work in which the adhesive coating film was formed on the surface was visually observed, and the masking property was evaluated based on the following evaluation criteria. The results are shown in Table 1.

(Evaluation criteria)
◯: Adhesive does not adhere to the bottom surface.
Δ: A small amount of adhesive is attached to the bottom surface.
X: A large amount of adhesive is attached to the bottom surface.

<Uniformity of coating film thickness>
The value obtained by subtracting the thickness of the work before forming the coating film from the thickness of the work after forming the coating film was defined as the film thickness of the coating film. The thickness of the work after forming the coating film was measured at five arbitrarily selected places. The thickness of each was measured using a micrometer [manufactured by Sanko Electronics Laboratory Co., Ltd., trade name: SWT-9000] in accordance with JIS C2151.

By determining the difference (variation) in the film thickness of the coating film measured at five locations, the uniformity of the film thickness of the coating film was evaluated based on the following evaluation criteria. The results are shown in Table 1.

(Evaluation criteria)
◯: The difference in the film thickness of the coating film is 1 μm or less.
Δ: The difference in the film thickness of the coating film is larger than 1 μm and 3 μm or less.
X: The difference in the film thickness of the coating film is larger than 3 μm.

<Appearance of coating film>
The appearance of the coating film formed on the surface of the work was visually observed, and the appearance of the coating film was evaluated based on the following evaluation criteria. The results are shown in Table 1.

(Evaluation criteria)
◯: The surface of the coating film is smooth (no unevenness).
Δ: There is unevenness on a part of the surface of the coating film.
X: The entire surface of the coating film is uneven.

(Example 2)
Instead of the exhaust fan, a spot cooler [manufactured by Daikin Industries, Ltd., trade name: SUASP1DT] is placed on one side of the work piece received by the receiving jig in the radial direction, and the receiving surface of the receiving jig and the bottom surface of the work are connected. The compressed air flowing out from the space toward one side in the radial direction of the work is blown toward the other side in the radial direction of the work. Except for this, an adhesive coating film was formed on the surface of the work in the same manner as in Example 1. Using the obtained work, the physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 1)
The compressed air was not supplied into the through hole of the jig. Except for this, an adhesive coating film was formed on the surface of the work in the same manner as in Example 1. Using the obtained work, the physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 2)
The compressed air was not supplied into the through hole of the jig. Except for this, an adhesive coating film was formed on the surface of the work in the same manner as in Example 2. Using the obtained work, the physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 3)
The exhaust fan did not suck the compressed air that flowed out from between the receiving surface of the receiving jig and the bottom surface of the work toward one side in the radial direction of the work. Except for this, an adhesive coating film was formed on the surface of the work in the same manner as in Example 1. Using the obtained work, the physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 4)
The compressed air was not supplied into the through hole of the jig, and the exhaust fan was not used. Except for these, an adhesive coating film was formed on the surface of the work in the same manner as in Example 1. Using the obtained work, the physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.

<Comprehensive evaluation>
Comprehensive evaluation of the coating equipment was performed based on the following evaluation criteria. The results are shown in Table 1.

(Evaluation criteria)
⊚: All are ○.
◯: There is no ×, but there is one △.
Δ: There is no ×, but there are two or more Δs.
×: There is one or more × (failed).

The present invention can be applied to a coating device or the like.

A Coating device W Work L Adhesive (liquid)
G Compressed air (gas)
10 Receiving jig 11 Receiving surface 12 Through hole (outlet)
13 Recess 13a Bottom 14 Groove 20 Coating gun (sprayer)
21 Ejection 30 Gas generator (supply means)
40 Exhaust system (change means)

Claims (6)

A receiving jig to receive the work and
A sprayer that applies the liquid to the coated surface by atomizing the liquid toward the coated surface of the work and ejecting the liquid.
A supply means for flowing the gas along the non-coated surface by supplying a gas between the receiving jig and the non-coated surface of the work.
The direction of the flow of gas flowing along the non-coated surface of the work and flowing out from between the receiving jig and the non-coated surface toward one side in a predetermined direction is changed, and the gas is applied to the coated surface of the work. A coating device including a changing means for flowing a gas toward the other side in a predetermined direction along the above. In claim 1,
The changing means is provided on the other side of the work received by the receiving jig in a predetermined direction, and gas flowing out from between the receiving jig and the non-coated surface toward one side in a predetermined direction is discharged in a predetermined direction. A coating device characterized by sucking toward the other side. In claim 1 or 2,
The receiving jig has a horizontal receiving surface for receiving the work, and has a receiving surface.
The non-coated surface of the work has a bottom surface of the work.
A coating device characterized in that a receiving surface of the receiving jig is formed with an outlet for blowing out a gas supplied from the supplying means between the receiving surface and the bottom surface of the work. In claim 3,
The non-coated surface of the work has an outer peripheral surface of the work in addition to the bottom surface of the work.
On the receiving surface of the receiving jig, a recess for accommodating the work is formed so as to leave a gap between the receiving surface and the outer peripheral surface of the work.
The coating device is characterized in that the outlet is formed on the bottom surface of the recess. In claim 4,
The atomizer has a spout for ejecting the liquid, and is provided on the upper side of the work received by the receiving surface so that the central axis of the spout is orthogonal to the receiving surface of the receiving jig. A coating device characterized by the fact that. In claim 4 or 5,
A coating device characterized in that a plurality of grooves extending radially from the air outlet are formed on the bottom surface of the recess.

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