JPS6036384Y2 - mask jig - Google Patents

Description

[Detailed description of the invention] This invention is a mask jig that is a molded product, such as a vehicle bumper, which has an elongated main body and bent parts integrally formed at both ends of the main body. In particular, it relates to a mask jig for painting synthetic resin molded products.

Synthetic resin molded products having elongated main bodies and bent parts, such as vehicle bumpers, have poor dimensional stability and variations in shape, so masking with jigs such as electroformed nickel masks has not been possible.

In particular, bumpers made of modified polypropylene or reactive polyurethane injection molded products have poor dimensional stability during molding, heat shrinkage during paint baking, and deformation due to handling after molding. Masking with a tool did not allow accurate parting surfaces, so masking was performed with taping as shown in FIG.

FIG. 1 is a perspective view showing a conventional masking method, showing a molded product 1 being masked with a single-sided adhesive tape 2. As shown in FIG.

Moreover, even if it were made into a jig, it would be deformed and correction by taping would be necessary.

However, such masking by taping requires a lot of man-hours and has the problem of high cost.

This idea was created by focusing on these conventional problems, and by dividing the jig and engaging it at the tip of the bent part of the product, and joining the divided parts at the overlapping part, the above-mentioned problem can be solved. The purpose is to solve problems.

This invention is a mask jig for a molding amount in which an elongated main body part and bent parts at both ends of the main body part are integrally formed, and the main body part has a shape that covers the molding amount. a mask member divided at portions corresponding to , an overlapping portion provided at a joint portion of the divided mask member, and a retaining portion provided at a portion corresponding to the tip of the bent portion of the mask member. This is a mask jig that includes.

This idea will be explained below with reference to the drawings.

Fig. 2 is an exploded perspective view showing one embodiment of this invention, Fig. 3 is a partial plan view showing the set state, Fig. 4 is a cross-sectional view of the IV-TV in Fig. 3, and Fig. 5 is −■ It is a sectional view.

In the drawings, 3a and 3b are divided mask members made of a hard material such as electroformed nickel, and have a shape that covers the non-painted part with a molding amount of 1, and are located approximately in the center of the main body portion 1a with a molding amount of 1. It is divided into two parts at a part corresponding to the part, and the divided part is used as an overlapping part 4a, 4b, and a bent part 1b with a molding amount of 1.
, an engaging portion 5a is provided at the tip portion 1d of the lc, and a portion corresponding to the le.
.

5b is formed.

The retaining portions 5a, 5b are structured to engage with the tip portions 1d, le.

When the mask members 3a and 3b are set in these engaged states, one of the overlapping parts 4a has the earth wall and the side wall having an inclined surface toward the tip so that the overlapping parts 4at4b overlap, and Correspondingly, in the overlapping portion 4b, the inner surfaces of the earth wall and the side wall are inclined surfaces toward the tips, and in the overlapping state, the two fit together and are slidable in the longitudinal direction.

The mask jig configured as described above has the mask member 3a
The engaging portion 5a of
In the engaged state, the mask member 3a is installed so as to cover the bent portion 1b and the unpainted portion of the left half of the main body portion 1a, and the retaining portion 5b is placed on the tip portion 1e in the same manner. The bent portion 1c and the main body portion 1 in the engaged state
It is installed so as to cover the right half of part a, and masking is performed by overlapping the overlapping part 4b on the overlapping part 4a.

If you spray paint from above in this state, you can paint the parts that are not covered by the mask jig.

When installing the mask member 3at3b, the overlapping parts 4a and 4b overlap with the engaging part 5at5b engaged, so that the deformation of the molding amount 1 is corrected by the weight of the mask members 3a and 3b, and the molding amount 1 Since the overlapping parts 4a and 4b can be slid in the longitudinal direction even if there are variations in dimensions, masking can be performed using the pair of jigs even when the molding amount 1 is deformed or has variations in dimensions. can.

If the molding amount 1 is large, the overlapping parts 4a and 4b will overlap in a sliding state, so a slight gap will be formed between the corresponding slopes, and the parting line will also be as shown in Figure 3. Although a slight step is formed, it can be made negligible by reducing the inclination angle of the inclined surfaces of the overlapping portions 4a and 4b as small as possible.

FIG. 6 is a partial perspective view showing another embodiment, FIG. 7 is a front view showing the state during setting, and FIGS.
The same reference numerals as in the figures indicate the same or corresponding parts.

In this embodiment, a folded portion 6 is formed at the tip of the engaging portions 5a and 5b of the mask jig 3b, and a folded portion 1c with a molding amount of 1 is formed.
It is adapted to engage with an undercut portion formed at the tip end portion 1e of.

Although only the mask member 3b is illustrated in the drawings, the mask member 3a also has a similar configuration.

In the mask jig configured as described above, as shown in FIG. 7, when the folded part 6 is engaged with the undercut part formed inside the tip part 1e and rotated in the direction of the arrow, The mask member 3b is set while correcting the deformation of the molding amount 1, and complete masking can be performed without fixing with a clamp or the like.

In addition, in the above embodiment, the case where the jig is divided into two parts has been described, but it may be divided into three or more parts.

Furthermore, the structures of the engaging portion and the overlapping portion are not limited to those of the embodiments, and may have other structures.

Further, the shape of the molded amount is not limited to that shown in the drawings, but may be other shapes, and the shape of the mask member can also be changed in accordance with the shape of the molded amount.

Furthermore, the present invention is applicable not only to vehicle bumpers but also to masking of other molding amounts.

As explained above, according to this invention, the jig is divided and engaged at the tip of the bent part of the product, and the divided parts are joined at the overlapping part, so that the deformation of the molding amount can be corrected. At the same time, dimensional variations can be absorbed, and the mask jig comes into close contact with the surface of the molded amount, so there is no gap between the molded amount and the mask jig, and it is possible to paint the parting line neatly.

In addition, if a folded part is formed at the tip of the locking part, the mask jig can be attached so that it can be rotated based on the tip of the folded part of the molded amount, so even if the molded amount has some undercut. , the mask can be done without clamps.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional masking method, Fig. 2 is an exploded perspective view showing an embodiment of this invention, Fig. 3 is a partial plan view showing the set state, and Fig. 4 is a third Figure TV-
FIG. 5 is a cross-sectional view taken along the line IV, FIG. 5 is a cross-sectional view taken along the line ■--■, FIG. 6 is a perspective view of a portion of another embodiment, and FIG. 7 is a front view showing a state in which it is being set. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the molding amount, lb and lc are the bent parts, 3at3b is the mask member, 4a*4b is the overlapping part, 5a and 5b are the engaging parts, and 6 is the folded part. Department.

Claims (4)

[Scope of utility model registration request] (1) A mask jig for a molded product in which a long main body and bent parts at both ends of the main body are integrally formed, the main body having a shape that covers the molded product; a mask member divided at portions corresponding to , an overlapping portion provided at a joint portion of the divided mask member, and a retaining portion provided at a portion corresponding to the tip of the bent portion of the mask member. Includes mask jig. (2) The mask jig according to claim 1, wherein the mask member is divided into two parts. (3) A utility model registration request in which an inclined surface is formed on the surface side of the overlapping portion of one mask member, and a sloped surface is formed on the inner side of the overlapping portion of the other mask member correspondingly. A mask jig according to scope 1 or 2. (4) The mask jig according to any one of claims 1 to 3, wherein a folded part is formed at the tip of the engaging part.