JP4342169B2 - Coating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coating apparatus using masking, and more particularly to an improved technique that allows a coating material sprayed from a single nozzle to be applied to a desired site in a desired coating amount.
[0002]
[Prior art]
Cylinder body inner surface (cylinder part) and cylinder body for the purpose of preventing rusting on the inner surface of the cylinder body of the drum cylinder for drum brakes, improving the slidability of the piston, and assembling a boot that spans between the piston and the cylinder body Apply assembly oil to the boot assembly part (cylinder body end face). In this case, it is necessary to prevent application (adhesion) of the assembly oil to other than the application site by a masking plate or the like.
[0003]
Prior art document information related to the invention of this application includes the following.
[Patent Document 1]
Japanese Patent No. 2651418 [Patent Document 2]
Japanese Utility Model Publication No. 57-173862 [0004]
Patent Document 1 discloses a drum brake structure in which a rubber boot covering between a shoulder portion of a piston and a wheel cylinder body is stretched. In Patent Document 2, a masking device having a dish-shaped shielding plate attached thereto is integrally attached to the attachment portion of the air spray gun, and the tip of the shielding plate on the object side is positioned inside the spray pattern. There has been disclosed a masking device for an automatic coating machine that masks an object to be coated at the tip and remarkably reduces the labor and work time of line painting, which has conventionally been a great deal.
[0005]
As disclosed in Patent Document 2, when applying assembly oil to the cylinder body inner surface or the boot incorporating portion (cylinder body end surface) using masking, as shown in FIG. A nozzle 5 is provided on one end side of the axial line of the chamber 3, a shielding plate 9 having an opening 7 is attached to the other end side of the axial line of the chamber 3, and a coating material (oil) 11 is sprayed from the nozzle 5. Assembly oil (coating material 11) is applied to the inner surface 15 and the end surface 17 of the cylinder body 13.
[0006]
[Problems to be solved by the invention]
However, when the range to be coated of the object to be coated is limited, there are some protrusions on the sprayed coating material with only the shielding plate, and adjustment to prevent this has been difficult. And even when the range to be painted is slightly changed, it is necessary to change the position of the coating line, that is, the position of the shielding plate in accordance with this.
In particular, in the case where assembly oil is applied to the cylinder body inner surface or the cylinder body end surface serving as a boot incorporating portion, the shielding plate and the cylinder body are displaced from each other, for example, the wheel shown in FIG. Assembly oil may adhere to the outer periphery 13a of the cylinder and the side surface of the boot groove 19 shown in FIG.
Further, as shown in FIG. 4, in the spray application, since the coating material 11 adheres in a fine granular form, the amount of adhesion is larger than that of the application by coating, and particularly on the cylinder body end face to which a small amount of coating material is to be adhered. Therefore, spray coating is not a preferable coating method.
As shown in FIG. 5, when the boot 21 is assembled, the assembly oil is scraped by the fitting portion 21 a of the boot 21, and the coating material 11 protrudes as shown in FIG. 6.
From these, it is possible to cause the adhesion of the coating material from the assembled wheel cylinder to another, and to mistake the protruding coating material with the hydraulic fluid used for braking introduced into the cylinder (pseudo-leakage) was there.
The present invention has been made in view of the above circumstances, and the sprayed coating material is used separately for spray coating and coating coating (transfer coating), and the respective coating amounts of spray coating and transfer coating are used. Provides a controllable coating device, and enables a coating material sprayed from a single nozzle to be applied to a desired site in a desired coating amount.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the coating apparatus according to claim 1 of the present invention is a coating apparatus for spray-coating a coating material from a single nozzle onto an object to be coated with an opening hole.
An absorbent member for adsorbing and holding the sprayed application material ;
The absorbing member is capable of transferring and applying the coating material in contact with the object to be coated, and also covering the object to be coated from the spray application as a mask means and exposing the opening hole. together to apply the spray coating in contact with the end surface of the objects only on the inner face of the opening hole, characterized in that to apply the transfer coating on said end face.
[0008]
In this coating apparatus, an absorption member that absorbs and holds the sprayed coating material is provided, and the coating material can be transferred and applied by the absorption member contacting the object to be coated. It is used separately for spray application that adheres directly to the object to be coated without being absorbed, and transfer application that adheres to the object to be coated when the absorbing member comes into contact with the object after being absorbed by the absorbing member, Moreover, it is possible to control the coating amounts of spray coating and transfer coating. Thereby, the coating material sprayed from a single nozzle can be applied to a desired site with a desired coating amount.
[0010]
Further, in this coating apparatus, since the absorbing member also serves as a mask means and covers at least the contact portion with the object to be coated from spray coating, adhesion of the coating material to the portion covered by the absorbing member by spray coating is prevented. Then, transfer application (coating application) is possible when the absorbing member comes into contact with the part. As a result, a desired part can be applied with a small amount of adhesion compared to spray coating in which the coating material adheres finely and the amount of adhesion increases.
[0012]
Further, in this coating apparatus, the object to be coated has an opening hole, and the absorbing member is applied so as to cover the end face where the opening hole is exposed, so that spray coating is applied to the inner surface of the opening hole and transfer is performed. Application is applied to the end face. Thereby, the adhesion amount of the coating material is increased by spray coating on the inner surface of the object to be coated having the opening hole, and the adhesion amount of the coating material is decreased by transfer coating on the end surface of the coating object.
[0013]
The coating apparatus according to claim 2 is characterized in that the object to be coated or the absorbing member relatively rotates about an axis.
[0014]
In this coating apparatus, since the object to be coated or the absorbing member rotates relative to the center of the axis, the annular end surface of the object to be coated and the annular absorbing member are slidably contacted around the same axis. . Thereby, the transfer coating on the end face by the absorbing member is made uniform in the circumferential direction of the end face.
[0015]
According to a third aspect of the present invention, the absorbing member is provided so as to be movable along the axis of the cylindrical body, and is pressed by the urging means from one end side of the cylindrical body toward the other end side thereof. It is characterized by being in contact with the paint at a predetermined pressure.
[0016]
In this coating apparatus, the absorbing member is provided so as to be movable along the axis of the cylindrical body, and is pressed by the urging means from one end side of the cylindrical body toward the other end side with a predetermined pressure. Contact. Therefore, the amount of deflection of the absorbing member (the amount of deformation) changes depending on the combination of the hardness of the absorbing member and the pressing load by the urging means, and the contact area of the absorbing member with the end surface can be adjusted. Thereby, the application range (application area) with respect to the end surface by the absorbing member can be controlled.
[0017]
The coating device according to claim 4 is characterized in that the absorbing member is formed of a single polyurethane or a unit of polyurethane and a metal sliding plate contacting the object to be coated.
[0018]
In this coating apparatus, the absorbing member is formed by integrating polyurethane alone or polyurethane and a metal sliding plate in contact with the object to be coated. In the case where the absorbent member is made of polyurethane alone, the polyurethane is elastically deformed by the pressing load and comes into contact with the object to be coated, so that the coating material can be exuded over the entire contact surface of the absorbent member and rotated, and the structure of the absorbent member is It becomes simple. Further, in the case where the absorbent member is an integral structure of polyurethane and a sliding plate, the coating material can be prevented from exuding more than necessary from the entire contact surface, and the wear resistance of the absorbent member contact surface is increased.
[0019]
The coating apparatus according to a fifth aspect is characterized in that the object to be coated is a wheel cylinder, and the coating material is oil sprayed from a nozzle toward the absorbing member and the wheel cylinder.
[0020]
In this coating apparatus, the object to be coated is a wheel cylinder, and the coating material is oil sprayed from the nozzle toward the absorbing member and the wheel cylinder. Therefore, the oil between the inner surface of the wheel cylinder and the end surface of the wheel cylinder. The application is separated, and the application amount can be individually managed. As a result, the assembly oil pool is prevented, and the assembly oil is prevented from being scraped out by the boot fitting portion when the boot is assembled.
[0021]
The coating apparatus according to claim 6 is characterized in that a through hole is formed in a contact portion of the sliding plate with the object to be coated.
[0022]
In this coating apparatus, a through hole is formed in a contact portion of the sliding plate with the object to be coated, the pressing load to the end surface acting on the sliding plate via the absorbing member, the hole diameter and the number of holes of the through hole, Thus, the amount of the coating material extruded from the through hole can be controlled. Thereby, in particular, a small amount of coating material can be controlled stably and with high accuracy.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a coating apparatus according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a coating apparatus according to the present invention.
The coating unit 33 of the coating apparatus 31 according to the present invention mainly includes a spray nozzle 35, a chamber 37 that is a cylindrical body that sprays the coating material 11 therein, and an absorption member 39 that is provided inside the chamber 37. As a component.
[0024]
The spray nozzle 35 is rotatable around an axis 43 by a motor 41. The spray nozzle 35 sprays the coating material 11 radially toward the other end side in the direction of the axis 43 (the right side in FIG. 1). An opening 44 is formed at the other end of the chamber 37, and a stopper 45 protruding inward in the radial direction is provided on the periphery of the opening 44.
[0025]
The absorbing member 39 provided in the chamber 37 is formed in an annular shape, and sprays the coating material 11 from the inner hole 47 to the outside of the chamber 37. That is, the absorbing member 39 also serves as a mask unit. As this absorbing member 39, for example, polyurethane (density 40 to 60 kg / m ³ ) can be suitably used.
[0026]
A coil spring 49 is disposed inside the chamber 37, and the coil spring 49 presses the absorbing member 39 toward the other end side in the direction of the axis 43 via the push plate 51. The absorption member 39 pressed by the coil spring 49 is pressed against the stopper 45, thereby preventing the absorption member 39 from dropping from the chamber 37.
[0027]
As for this application part 33, two things are arrange | positioned facing one end side and the other end side of the axis line 43 direction on both sides of the cylinder body 13 which is a to-be-coated object. FIG. 1 shows only the left half of the two application portions 33.
[0028]
The cylinder body 13 is held by a holding mechanism (not shown) and is rotatable around the axis 43. The application unit 33 is rotated through the spray nozzle 35 that is rotated by the motor 41 with the chamber 37 and the spray nozzle 35 fixed to each other.
[0029]
Since the cylinder body 13 or the absorbing member 39 rotates relative to the axis center in this way, the annular end surface 17 of the cylinder body 13 and the annular absorbing member 39 are slidably contacted around the same axis center. Thus, the transfer application to the end surface 17 by the absorbing member 39 is made uniform in the circumferential direction of the end surface 17.
[0030]
The absorbing member 39 also serves as a mask means and covers at least the contact portion (end surface 17) with the cylinder body 13 from spray application. Accordingly, the application material 11 is prevented from adhering to the end surface 17 covered with the absorbing member 39 by spray application. Then, transfer application (coating application) is performed by contacting the end surface 17 with the absorbing member 39. As a result, the end surface 17 can be applied with a small amount of adhesion compared to spray coating in which the coating material 11 adheres finely and the amount of adhesion increases.
[0031]
In the coating device 31, the cylinder body 13 has an opening hole 55, and the absorbing member 39 is in contact with the end surface 17 where the opening hole 55 is exposed so that spray application is applied to the inner surface 15 of the cylinder body 13. And transfer coating is applied to the end face 17. Accordingly, the inner surface 15 of the cylinder body 13 having the opening hole 55 can be increased in the amount of application material 11 by spray coating, and the end surface 17 can be decreased in the amount of application material by transfer coating. Yes.
[0032]
Further, in the coating device 31, since the absorbing member 39 is formed as a single polyurethane, the absorbing member 39 is elastically deformed by the pressing load of the coil spring 49, contacts the end surface 17, and the entire contact surface of the absorbing member 39. Thus, the coating material 11 can be oozed out and spin-coated. Further, since the polyurethane is a simple substance, the structure of the absorbing member 39 is simplified.
[0033]
Further, in the coating apparatus 31, the absorbing member 39 is provided so as to be movable along the axis 43 of the chamber 37. Then, the coil spring 49 is pressed from one end side to the other end side of the axis 43 and comes into contact with the cylinder body 13 at a predetermined pressure. Therefore, the absorption by the combination of the hardness of the absorbing member 39 and the pressing load by the coil spring 49 is absorbed. The bending amount (deformation amount) of the member 39 changes, and the contact area of the absorbing member 39 with respect to the end surface 17 can be adjusted. As a result, the application range (application area) for the end surface 17 by the absorbing member 39 can be controlled.
[0034]
Next, a coating method using the coating apparatus 31 having such a configuration will be described.
First, the drum brake cylinder body 13 is positioned and held at the center position of the two application portions 33 arranged to face each other in the injection direction.
[0035]
From both the left and right directions, the application part 33 advances in the approaching direction with respect to the cylinder body 13 while rotating, the coil spring 49 is bent, and the absorbing member 39 is pressed against the end surface 17 of the cylinder body 13. As a result, the oil (coating material 11) that oozes from the rotating absorbing member 39 is applied (transfer-coated) to the end surface 17 of the cylinder body 13.
[0036]
At the same time, the inner surface 15 of the cylinder body 13 that is not covered with the absorbing member 39 is sprayed by the spray nozzle 35. At this time, the oil spray applied to the absorbing member 39 is sucked into the absorbing member 39. After the application is finished, the application part 33 moves backward in the direction away from the cylinder body 13, and the cylinder body 13 is released from its holding and discharged. Thereafter, the same operation is repeated.
[0037]
According to the coating apparatus configured as described above, the absorption member 39 that adsorbs and holds the sprayed application material 11 is provided, and the absorption member 39 can contact the cylinder body 13 to transfer and apply the application material 11. The sprayed application material 11 is directly absorbed on the cylinder body 13 without being absorbed by the absorbing member 39, and the absorbent member 39 comes into contact with the cylinder body 13 after being absorbed by the absorbent member 39, whereby the cylinder body 13 13 can be used separately from the transfer coating adhering to 13, and the amount of each of spray coating and transfer coating can be controlled. As a result, the coating material 11 sprayed from the single spray nozzle 35 can be applied to a desired site with a desired coating amount.
[0038]
Since the object to be coated is the cylinder body 13 and the coating material is oil sprayed from the spray nozzle 35 toward the absorbing member 39 and the cylinder body 13, the inner surface 15 of the cylinder body 13 and the cylinder body 13 The oil application with the end face 17 can be separated and the application amount can be individually managed. As a result, the coating material 11 can be thinly applied to the end face 17 to prevent the assembly oil pool and prevent the assembly oil from being scraped out by the boot fitting portion when the boot is assembled.
[0039]
In the coating device 31, the coating amount of the chamfered portion of the end surface 17 of the cylinder body 13 can be controlled by adjusting the inner diameter (D 1) of the absorbing member 39. Further, by adjusting the inner diameter (D2) of the push plate 51, the amount of the coating material 11 sucked into the absorbing member 39 can be controlled.
[0040]
Further, according to the spray application using the absorbing member 39 as the mask means, the application range can be set only for the inner surface 15 of the cylinder body 13, so that the application object (cylinder body 13) is displaced and a certain amount of application is performed. The size of the object (difference in the size of the cylinder body 13) can be absorbed.
[0041]
Next, another embodiment of the coating apparatus according to the present invention will be described.
FIG. 2 is a cross-sectional view of an essential part showing another embodiment of the coating apparatus according to the present invention. In addition, the same code | symbol is attached | subjected to the member same as the member shown in FIG. 1, and the overlapping description shall be abbreviate | omitted.
In the coating apparatus 61 according to this embodiment, the absorbing member 63 is integrally formed with polyurethane (density 20 to 40 kg / m ³ ) 65 and a metal (SUS304 or the like) sliding plate 67 that contacts the cylinder body 13. Is done. And the through-hole 69 equally distributed in the circumferential direction is drilled in the contact part with the cylinder body 13 of the sliding plate 67. As shown in FIG.
[0042]
The absorbing member 63 has a large number of through-holes 69 formed in the sliding plate 67 with different R pitches, and rotates and applies the coating material 11 sucked into the polyurethane 65 while extruding it with the pressing load of the coil spring 49. This application amount can be adjusted by the pressing load of the coil spring 49 and the diameter and number of the through holes 69. The coating method by the coating device 61 is performed in the same manner as the coating device 31 described above.
[0043]
According to this coating device 61, the absorbing member 63 is formed by integrating the polyurethane 65 and the metal sliding plate 67 that contacts the cylinder body 13, so that the coating material 11 more than necessary from the entire contact surface. Can be suppressed, and the wear resistance of the contact surface of the absorbing member 63 can be improved. Since the through hole 69 is formed in the contact portion of the sliding plate 67 with the cylinder body 13, the pressing load applied to the end surface 17 acting on the sliding plate 67 via the absorbing member 63, and the through hole The amount of the coating material 11 extruded from the through hole 69 can be controlled by the hole diameter and the number of holes 69, and in particular, a small amount of the coating material 11 can be controlled stably and with high accuracy.
[0044]
【The invention's effect】
As described above in detail, according to the coating apparatus according to the present invention, it is provided with the absorbing member that holds the sprayed coating material by suction, and the absorbing member can contact and apply the coating material to the object to be coated. Therefore, the sprayed coating material is not directly absorbed by the absorbing member but directly applied to the object to be coated, and after the absorbing member is absorbed by the absorbing member, the absorbing member comes into contact with the object to be coated. It can be used separately from the transfer coating that adheres, and the amount of each of spray coating and transfer coating can be controlled. As a result, the coating material sprayed from a single nozzle can be applied to a desired site in a desired coating amount.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a coating apparatus according to the present invention.
FIG. 2 is a cross-sectional view of an essential part showing another embodiment of the coating apparatus according to the present invention.
FIG. 3 is a cross-sectional view of a main part showing a conventional coating apparatus.
FIG. 4 is an enlarged view of an end surface of an object to be coated on which a coating material is attached.
FIG. 5 is an enlarged view of an end face of an object to be painted that represents the state of scraping of assembly oil.
FIG. 6 is an enlarged view of an end surface of an object to be painted that represents the state of protrusion of assembly oil.
[Explanation of symbols]
11 Oil (coating material)
13 Cylinder body (object to be painted)
15 Inner surface 17 End surface 31, 61 Coating device 35 Nozzle 39, 63 Absorbing member 43 Axis 49 Coil spring (biasing means)
55 Opening hole 67 Sliding plate 69 Through hole

Claims (6)

In a coating apparatus that sprays and applies a coating material from a single nozzle to an object to be coated with an opening hole,
An absorbent member for adsorbing and holding the sprayed application material ;
The absorbing member is capable of transferring and applying the coating material in contact with the object to be coated, and also covering the object to be coated from the spray application as a mask means and exposing the opening hole. the spray coating in contact with the end surface causes only applied to the inner surface of the opening hole of the object, a coating apparatus for causing applied to the end face of the transfer coating.   The coating apparatus according to claim 1, wherein the object to be coated or the absorbing member rotates relative to an axis center.   The absorbing member is provided so as to be movable along the axis of the cylindrical body, and is pressed by an urging means from one end side of the cylindrical body toward the other end side to come into contact with the object to be coated at a predetermined pressure. The coating apparatus according to claim 1 or 2.   4. The coating apparatus according to claim 1, wherein the absorbing member is formed by integrating polyurethane alone or polyurethane and a metal sliding plate that contacts the object to be coated. .   5. The coating according to claim 1, wherein the object to be coated is a wheel cylinder, and the coating material is oil sprayed from a nozzle toward the absorbing member and the wheel cylinder. apparatus.   The coating apparatus according to claim 4, wherein a through hole is formed in a contact portion of the sliding plate with the object to be coated.

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