JPH0753739Y2 - Coating equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a surface of an annular rib protruding on the lower surface of an object to be coated,
The present invention relates to a coating device that locally coats only a portion surrounded by the annular rib.

[Conventional technology]

Some cast automobile parts are locally coated with anticorrosive paint. For example, a shaft part W as shown in FIG.
Only the surface and the portion 2 surrounded by the annular rib 1 are locally coated.

[Problems to be solved by the device]

However, in this case, the outer surface and the inner surface of the annular rib 1 must be enclosed by masking plates 30 and 31, respectively, and the surface of the annular rib 1 and the portion 2 enclosed by the annular rib 1 must be coated separately. Therefore, it is very troublesome to paint, and at the same time, it is very troublesome to remove the stains of the paint adhering to the surfaces of the masking plates 30 and 31, and the work efficiency is poor.

In view of this, the present invention has a technical problem that the surface of the annular rib 1 and the portion 2 surrounded by the annular rib 1 can be coated simultaneously without using the masking plates 30 and 31.

[Means for Solving the Problems]

In order to solve this problem, the present invention is a coating apparatus that locally coats only the surface of an annular rib protruding on the lower surface of an object to be coated and the portion surrounded by the annular rib. Is provided with a paint nozzle that discharges paint toward the portion surrounded by the annular rib from below, and a cylindrical jig that shields the periphery of the paint nozzle. An annular groove is formed in which the annular rib is dipped and the surface of the annular rib is filled with a paint.

[Action]

According to the present invention, the annular rib protruding on the lower surface of the coated object is
Paint that is dipped in the paint filled in the annular groove formed on the upper end of the cylindrical jig to dip-paint its surface, and at the same time, is discharged from the paint nozzle that shields the periphery by the cylindrical jig. Then, the part surrounded by the annular rib is also painted.

At this time, since the parting line appears at a predetermined position corresponding to the depth of the immersion on the surface of the annular rib that is applied by being immersed in the paint filled in the annular groove of the cylindrical jig, the coating finish is Very good.

In addition, the paint nozzle that paints the part surrounded by the annular rib is covered with a cylindrical jig,
The paint discharged from the paint nozzle does not spray on the non-painted portion.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a sectional view of a waist showing an example of a coating apparatus according to the present invention, and FIG. 2 is an overall view thereof.

The coating apparatus shown in this example has a lifter arm 4 that moves up and down with a constant stroke between a coating material tank 3 that stores coating material and the coating objects W that are loaded and unloaded above the coating material tank W. , A paint nozzle 5 that discharges the paint in the paint tank 3 upward, and a cylindrical jig 6 that shields the periphery of the paint nozzle 5 are provided, and the upper end of each cylindrical jig 6 is provided. An annular groove 7 is formed in which the annular rib 1 projecting from the lower surface of each article W is dipped and the paint for dip coating is drawn from the inside of the paint tank 3 and filled.

The objects to be coated W, W are loaded and unloaded above the paint tank 3 by mounting a pair of left and right pedestals 9, 9 provided on the intermittent conveyor 8.

The lifter arm 4 is a cylinder provided outside the paint tank 3.
A paint supply pipe 11 connected to the paint nozzle 5 is piped inside while being driven up and down by the paint supply pipe 10.
A paint circulation pipe 13 having a pump 12 for pressure-feeding the paint in the paint tank 3 at a predetermined timing is connected to the paint pipe 11.

The inner edge 7a of the annular groove 7 is lower in height than the outer edge 7b.

Then, when the objects W, W to be coated are carried in above the paint tank 3, the piston rod 14 of the cylinder 10 extends and the lifter arm 4 rises from within the paint tank 3 and is mounted on the lifter arm 4. Paint nozzle 5 and the paint nozzle 5
The cylindrical jig 6 that shields the periphery of the object rises toward the lower surface of each object W to be coated.

At this time, the paint in the paint tank 3 is pumped up and filled in the annular groove 7 formed at the upper end of each cylindrical jig 6.

Then, when the lifter arm 4 rises to a height at which the annular rib 1 of each workpiece W is immersed in the annular groove 7 formed at the upper end of each cylindrical jig 6 by a predetermined depth, the cylinder 10 is driven. Is stopped and the pump 12 is started.

As a result, the surface of the annular rib 1 projecting from the lower surface of each object W is dipped in the coating material filled in the annular groove 7 of each tubular jig 6 for dip coating, and at the same time A portion 2 surrounded by 1 is flow-coated with a paint discharged from a paint nozzle 5 whose periphery is shielded by each cylindrical jig 6.

Therefore, the work efficiency is doubled as compared with the conventional case where the surface of the annular rib 1 and the portion 2 surrounded by the annular rib 1 are separately coated.

The surface of the annular rib 1 is dip-painted by immersing it in a paint in an annular groove 7 formed at the upper end of the cylindrical jig 6, and the paint nozzle 5 for painting the portion 2 surrounded by the annular rib 1 is Since the periphery is shielded by the cylindrical jig 6, it is not necessary to use a separate masking plate.

Further, even if a masking plate is not used, a constant parting line appears on the surface of the annular rib 1, so that the coating finish is very good.

In particular, if the inner edge portion 7a of the annular groove 7 is set lower than the outer edge portion 7b as in the embodiment, when the annular rib 1 is dipped, the paint in the annular groove 7 will be Since it overflows to the inside of 1, there is no possibility that the paint will adhere to the portion to be coated located outside the annular rib 1 and impair the finish of coating.

It should be noted that the paint that overflows from the annular groove 7 when the annular rib 1 is immersed and the excess paint discharged from the paint nozzle 5 are both dropped into the paint tank 3 and collected.

Next, when the coating of the objects W, W is completed, first, the pump 12
And the discharge of the paint from the paint nozzle 5 is stopped, then the piston rod 14 of the cylinder 10 contracts, the lifter arm 4 descends into the paint tank 3, and each paint provided on the lifter arm 4 Nozzle 5 and tubular jig 6
Is dropped into the paint in the paint tank 3, the intermittent conveyor 8 is activated, and new coated objects W, W are carried in place of the coated objects W, W.

Then, the piston rod 14 of the cylinder 10 extends again,
The lifter arm 4 rises toward the new object W, W to be coated.

At this time, the paint in the paint tank 3 is fully drawn and filled in the annular groove 7 of the cylindrical jig 6 provided on the lifter arm 4.

It should be noted that in the above embodiment, the tubular jig 6 is lowered into the paint in the paint tank 3 so that the annular groove 7 of the tubular jig 6 is filled with the paint. The present invention is not limited to this, and for example, as shown in FIG. 3, the paint supplied from the paint filling nozzle 15 may be poured into the annular groove 7 to be filled.

That is, FIG. 3 is a cross-sectional view of an essential part showing another embodiment of the present invention, in which a paint filling nozzle 15 which is branched and connected to a paint supply pipe 11 through a switching valve 16 has a tip end formed into a cylinder. It is provided so as to face the annular groove 7 of the shaping jig 6.

Then, at the time of coating, by operating the switching valve 16, first, the flow path of the paint supplied from the paint supply pipe 11 is connected to the paint filling nozzle 15 side, and the paint is filled in the annular groove 7. When the annular groove 7 is poured and the coating material is filled in the annular groove 7, the supply of the coating material is stopped, the annular rib 1 of the article W is dipped in the coating material filled in the annular groove 7, and the coating material supply pipe is provided. The flow path of the paint supplied from 11 is switched to the paint nozzle 5 side, and the paint is discharged toward the paint nozzle 5 or a portion 2 of the article W surrounded by the annular rib 1.

[Effect of device]

As described above, according to the present invention, the surface of the annular rib protruding on the lower surface of the object to be coated and the portion surrounded by the annular rib can be simultaneously coated, and it is necessary to use the masking plate. Therefore, there is no need to remove the dirt adhering to the masking plate, and the working efficiency is remarkably improved.

Further, there is also an excellent effect that high-quality coating can be performed in which a constant parting line appears on the surface of the annular rib without using a masking plate.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an example of a coating apparatus according to the present invention, FIG. 2 is an overall view thereof, FIG. 3 is a sectional view of a waist showing another embodiment of the present invention, and FIG. It is sectional drawing which shows a technique. DESCRIPTION OF SYMBOLS W ... Object to be coated, 1 ... Annular rib, 2 ... Portion surrounded by annular rib, 5 ... Paint nozzle, 6 ... Cylindrical jig, 7 ... Annular groove.

Claims (1)

[Scope of utility model registration request] 1. A coating apparatus for locally coating only the surface of an annular rib (1) protruding from the lower surface of an article (W) and a portion (2) surrounded by the annular rib (1). And a paint nozzle (5) for discharging paint from below the article to be coated (W) toward a portion (2) surrounded by the annular rib (1),
A cylindrical jig (6) that shields the periphery of the paint nozzle (5).
And an annular groove (7) filled with a paint for dipping the annular rib (1) and dip-coating the annular rib (1) on the upper end of the cylindrical jig (6). Coating equipment characterized by.