JP5442957B2 - Coating support device, coating support, and coating method - Google Patents

Description

  The present invention relates to a coating support device, a coating support, and a coating method.

Industrial products are painted to prevent rust. When painting industrial products, masking is applied so that the paint does not adhere to non-painted parts. For example, Patent Document 1 discloses a technique in which a common masking jig is attached to each masking portion of a plurality of objects to be coated before coating. Patent Document 2 discloses a technique of applying a coating after setting a rubber masking jig in a hole which is a non-coating part. Patent Document 3 discloses a technique for powder-coating the outer peripheral surface of a stator of a rotating electric machine, in which the outer peripheral surface of the stator is coated in a state where both axial ends of the stator are partitioned by an air curtain. It is disclosed.
Japanese Patent Laid-Open No. 9-10667 Japanese Utility Model Publication No. 6-21765 JP 2005-138048 A

  Masking the opening requires a great deal of labor and time, and therefore, when coating an object to be coated having a plurality of openings, the number of masking operations increases. In addition, in order to partition the non-painted part with an air curtain or the like, it is necessary to manufacture a jig or the like according to the outer shape of the object to be coated, and it cannot withstand today's demand for small-quantity and multi-product production. This invention is made | formed in view of such a subject, and makes it a subject to provide the technique which makes masking of coating easy.

  In order to solve the above problems, the present invention supplies air to the hollow portion of the object to be coated when a hollow object having a plurality of openings is coated.

  Specifically, it is a coating support device for supporting a hollow object having a plurality of openings, and is fitted to one of the plurality of openings to support the object to be coated. A support portion that has a ventilation path therein, and when the paint is applied to or attached to the object to be coated, and then is sent to the hollow portion of the object through the ventilation path. An air supply means.

  The coating support device is premised on painting the surface of a hollow object having a plurality of openings, and each opening of the object is connected via a hollow part. And A fitting support part has a shape which can be fitted with one opening part among these several opening parts, and supports a to-be-painted object by fitting with an opening part. This fitting support part has a ventilation path inside, and when the paint is attached to the surface of the object to be coated or after it is attached, the air supply means vents to the inside of the object to be coated, that is, to the hollow part. Inflate via the route. By exhausting air from the openings of the object to be coated by the air supplied by the air supply means, when the paint adheres to the surface of the object to be coated, the invasion of the paint trying to enter the opening is prevented, or The paint that has entered the opening is discharged from the opening. Therefore, according to the present invention, it is possible to exhibit the same effect as masking all the openings without individually masking the openings, and the painting work can be reduced by reducing the number of man-hours for painting work. It can be made easy.

  Further, the fitting support portion is made of a conductive member and is electrically grounded, and the object to be coated is covered with the powder coating in a state of being electrically grounded via the fitting support portion. It may be electrostatically attached.

  When the paint is electrostatically attached, the paint tends to adhere to the object to be coated by electrostatic attraction. Here, in general, the electrostatic attractive force in electrostatic coating is much weaker than the force that the air flow gives to the powder coating material. Therefore, in the case of electrostatic coating, it becomes possible to reliably mask the non-painted portion with the air flow by the air supply means.

  Moreover, this invention can also be grasped | ascertained as a support tool. That is, the present invention is a coating support for supporting a hollow object having a plurality of openings, and supports the object by fitting with one of the plurality of openings. A fitting support part is provided, and the fitting support part has a ventilation path for supplying air to the hollow part of the object to be coated when or after the paint is adhered to the object to be coated. It may be a thing.

  The present invention can also be understood from a method aspect. That is, the present invention is a coating method for coating a hollow object having a plurality of openings, a coating step for attaching a paint to the object to be coated, and when or after the coating step is performed. And an air supply step of supplying air from one of the plurality of openings to the hollow portion of the object to be coated.

  It becomes possible to easily mask the paint.

  Hereinafter, embodiments of the present invention will be exemplarily described. In the present embodiment, the description will be made on the assumption that the cylinder body is painted among the caliper assemblies of the disc brake that brakes ordinary passenger cars. However, the present invention is not limited to such an object to be painted. Absent.

<Configuration of the object>
FIG. 1 is an external perspective view of a body 1 that is an object to be coated according to the present embodiment. As shown in FIG. 1, the body 1 includes a cylinder inner diameter portion 2 into which a piston that presses a pad of a disc brake is fitted. Further, the cylinder inner diameter portion 2 of the body 1 is provided with an inlet 3 that is a hole for supplying hydraulic oil, and a bleeder 4 that is a hole for extracting air from a hydraulic piping system that transmits a brake operating pressure. ing. The body 1 is made of FCD (Ferrum Casting Ductile) and needs to be coated on the surface to prevent rusting. Since the moving piston is fitted, it is not preferable that the paint adheres to the cylinder inner diameter portion 2. The present embodiment is based on the premise that such an object to be coated that has a hollow portion and has a plurality of openings, and to which the paint is not preferably applied is applied.

<Configuration of Embodiment>
FIG. 2 is an external view of the coating apparatus. As shown in FIG. 2, the coating device 5 includes a support device 6 (corresponding to the coating support device in the present invention) that supports the body 1 that is the object to be coated, and corona charging that sprays the paint on the object to be coated. A painting machine 7 of the type is provided. For convenience of explanation, the painting apparatus 5 with the body 1 set is shown.

The support device 6 includes a hanger 8 (corresponding to a coating support in the present invention), a support 9 that supports the hanger 8, and an air pump 10 that supplies air to the hanger 8. The hanger 8 includes a tube-shaped hanger body 11 having a ventilation path through which air supplied from the air pump 10 flows, and a disk-shaped fitting member 12 attached to the tip of the hanger body 11. The hanger body 11 has sufficient strength to support the body 1. Further, the fitting member 12 is a disk-shaped member that fits into the cylinder inner diameter portion 2, but has a slightly larger diameter than the cylinder inner diameter portion 2, and the peripheral edge thereof is chamfered in a tapered shape. The portion is in contact with the edge of the opening portion of the cylinder inner diameter portion 2 (that is, the portion where the piston seal is mounted) so that the fitting member 12 does not enter to the back of the cylinder inner diameter portion 2 (that is, the inlet 3 side). It is configured. The fitting member 12 and the hanger body 11 of the hanger 8 are made of a conductive member and are electrically grounded, so that the object to be supported can be electrically grounded.

  The coating machine 7 is a corona charging type coating machine (manufactured by Asahi Sunac Co., Ltd.). The electrostatic gun 13 has a built-in electrode for charging the powder coating, and supplies the powder coating to the electrostatic gun 13. The paint tank 14 is composed of an auxiliary device 15 for supplying compressed air or the like for sending out the powder paint in the paint tank 14.

<How to use the embodiment>
Next, the usage method of the coating apparatus 5 is demonstrated. When painting the body 1, as shown in FIG. 2, the cylinder inner diameter portion 2 of the body 1 is fitted to the fitting member 12 of the hanger 8 and the body 1 is supported by the support device 6. Next, the air pump 10 is activated to send air to the cylinder inner diameter portion 2. The pressure of the air that the air pump 10 sends to the cylinder inner diameter portion 2 is a pressure that does not allow the body 1 to be detached from the hanger 8, and is a pressure of about 0.1 to 0.7 MPa in the present embodiment. The powder coating material is electrostatically coated by the coating device 5 while air is sent to the cylinder inner diameter portion 2. The powder coating material is an epoxy resin and contains 40% zinc particles. FIG. 3 is a diagram showing the state of the body 1 and the hanger 8 being painted. FIG as shown in 3, by air fed to the cylinder bore 2 by the air pump 10, the inlet 3 and for bleeder 4 or we air is blown, the powder coating material cylinder bore 2 and the inlet 3, bleeder It will not adhere to the 4th hole. The coating is completed by performing a baking process with the powder coating adhered to the body 1. The baking process is performed at 200 ° C. for 60 minutes.

In addition, when painting while air blowing with the air pump 10, the air blow is performed at a pressure of about 0.1 MPa in consideration of the influence of air blown from the inlet 3 or the like on the painting. Further, when air blowing is performed after the powder coating is sprayed, air blowing is performed at a pressure of about 0.7 MPa in order to reliably blow the powder coating remaining on the cylinder inner diameter portion 2 and the like. Data for comparing the effects of air blow are shown in Table 1 below. In Table 1, Example 1 was air blown (pressure 0.1 MPa) during coating, Example 2 was air blown (pressure 0.7 MPa for 10 seconds) after coating, and Comparative Example was air It is not blown. Table 1 is a visual confirmation of the state of adhesion of the powder coating material to the non-painted portion by wiping with a cotton swab. The non-coating portion is a hole portion of the cylinder inner diameter portion 2, the inlet 3, and the bleeder 4. As shown in Table 1, it can be seen that the effect of masking can be obtained by air blowing.

<Effect of embodiment>
As described above, according to the above-described embodiment, even when there is a non-coating region such as the cylinder inner diameter portion 2, the body 1 can be painted without masking the holes of the bleeder 4, the inlet 3, and the like. Become. By simply setting the body 1 on the hanger 8, the opening of the cylinder inner diameter portion 2 can be masked and air can be discharged from the bleeder 4 and the inlet 3. Even if it is an object to be coated, it is possible to perform the painting work simply by setting it on the hanger 8 and supplying air or the like, and the work man-hours can be greatly reduced. Such a great effect becomes more remarkable as the number of openings of the object to be coated increases.

  Although the above embodiment has been described on the assumption that the body 1 having one cylinder inner diameter portion 2 is painted, the present invention is not limited to such an embodiment. That is, the present invention can be applied to any object to be coated that has a cavity such as the cylinder inner diameter portion 2 and that does not prefer that the paint adheres to the inside. Further, the application target of the present invention is not limited to an object to be coated having one cylinder inner diameter portion (cavity) like the body 1 according to the above embodiment. That is, the present invention can be applied to an object to be coated such as a body having a plurality of cylinder inner diameter portions. In that case, for example, a fitting member that fits into each cylinder inner diameter portion is provided.

  Further, in the above embodiment, the body 1 is supported on the hanger 8 supported by the fixed support 9 and the body 1 is individually coated. However, the present invention is limited to such an embodiment. is not. That is, according to the present invention, a large number of hangers travel on the rail, and the bodies supported by the respective hangers are configured so as to sequentially pass through the coating chamber in which the powder coating material is sprayed, thereby making the bodies continuous. You may make it paint on. Moreover, in the said embodiment, although coating was performed, sending air to the cylinder internal diameter part 2 with the air pump 10, this invention is not limited to such embodiment. That is, according to the present invention, after the paint is attached to the body, air is sent to the cylinder inner diameter portion 2 to discharge the paint, and after the paint is discharged from the cylinder inner diameter portion, the coating process is completed. You may make it make it.

The external appearance perspective view of a body. FIG. 3 is an external view of a coating jig and a coating apparatus. The figure which shows the state in process of painting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Body 2 ... Cylinder inner diameter part 3 ... Inlet 4 ... Breeder 5 ... Coating apparatus 6 ... Support apparatus 7 ... Coating machine 8 ... Hanger 9 ... Support Tool 10 ... Air pump 11 ... Hanger body 12 ... Fitting member 13 ... Electrostatic gun 14 ... Paint tank 15 ... Auxiliary device

Claims (5)

A support device for coating that supports a hollow object having a plurality of openings,
A fitting supporting portion for supporting the object to be coated is fitted with one opening of the plurality of openings, have a ventilation channel inside, a disk-shaped with chamfered peripheral edge tapered member A fitting support portion that sequentially passes through the coating chamber in which the powder coating material is sprayed while supporting the object by chamfering the edge of the opening of the object to be chamfered ,
An air supply means for supplying air to the hollow portion of the object to be coated through the ventilation path when or after the paint is attached to the object to be coated;
Support device for painting. The fitting support portion is composed of a conductive member and is electrically grounded.
The object to be coated is electrostatically attached with a powder coating in a state of being electrically grounded through the fitting support part.
The coating support apparatus according to claim 1. The object to be coated is a cylinder body of a brake caliper,
The opening is an opening portion of a cylinder included in the cylinder body.
The coating support apparatus according to claim 1 or 2. A coating support for supporting a hollow object having a plurality of openings,
A fitting support part that fits with one of the plurality of openings and supports the object to be coated is provided,
The fitting support portion, after said coating to the object to be coated is when or deposited is attached, have a vent path for air to the hollow portion of該被coated article therein, a peripheral tapered The chamfered portion of the chamfered disk-shaped member abuts against the edge of the opening of the object to be coated while supporting the object to be coated, and sequentially passes through the coating chamber in which the powder paint is sprayed .
Paint support. A painting method for painting a hollow article having a plurality of openings,
A coating step of attaching a paint to the object to be coated;
In performing the coating step, to mate with one opening of the plurality of openings, the peripheral edge
The chamfered portion of the disk-shaped member chamfered into a taper shape abuts against the edge of the opening of the object to be coated, and sequentially passes through the coating chamber in which the powder paint is sprayed while supporting the object to be coated. An air supply step for supplying air to the hollow portion of the object to be coated through a ventilation path of the member,
How to paint.

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