JPS6237744Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure for preventing warping of a plate-shaped member for hot stamping made of synthetic resin or the like to be hot stamped by pressure and heating.

For example, as part of the television cabinet 1 shown in FIG. 1, a synthetic resin plate-shaped lid member 2 that can be opened and closed to house various adjustment knobs has a surface that is designed to enhance its decorativeness. Wood grain patterns, various display characters, or hot stamps with metallic luster are often applied to the wood. That is, as shown in FIG. 2, a protective layer 4 such as polyester, a release layer 5,
A skin layer 6 formed into an appropriate pattern by vapor deposition or printing of aluminum or the like, and a thermoplastic adhesive layer 7
Using a hot stamp sheet 3 consisting of a hot stamp sheet 3, this is pressed and heated at 220 to 230°C and about 2 to 5 tons onto the surface of the lid member 2 using a hot press or roller to transfer the skin layer 6 together with the adhesive layer 7. It is.

However, when hot stamping is applied to a long, flat member such as the lid member 2 above by applying pressure and heat, a certain amount of "warp" will always occur along the length of the member due to heat shrinkage. There was a problem that occurred. Particularly in cases where the entire part where the hot-stamped parts are assembled is smooth, such as the TV cabinet 1 above, even a slight "warp" can cause a difference in level between adjacent parts, significantly reducing the appearance quality. It will drop. Therefore, conventionally, after hot stamping, the above-mentioned "warp" was corrected by heating again.

This idea was made by focusing on the above-mentioned problems of the conventional hot stamping material, and the hot stamping surface and the back surface of the hot stamping member are formed into convex curved surfaces having a predetermined radius of curvature along the longitudinal direction. By doing so, the purpose is to prevent the occurrence of "warp" due to pressure and heating during hot stamp processing, and to omit the subsequent straightening process.

Hereinafter, one embodiment of this invention will be described in detail based on the drawings.

Figures 3 and 4 show an embodiment in which this invention is applied to the lid member 2 of the television cabinet 1 described above.
1 and hinge parts 12, 12 on the left and right sides, and are integrally molded from hard synthetic resin such as styrene resin. The front surface 13 to be hot stamped and the back surface 14 are formed into convex curved surfaces having a predetermined radius of curvature along the longitudinal direction. Although the above-mentioned convex curved surface is exaggerated in the figure, a member having a length L of about 250 mm has a relatively gentle convex curved surface with a radius of curvature of about 10,000 to 15,000 mm, for example.

Therefore, as a result of the above configuration, when hot stamping is applied to the hot stamped surface 13 by pressurizing and heating, the center part is relatively thick and both ends are thin, so that the hot stamp surface 13 is heated. "Warp" along the longitudinal direction due to shrinkage is reduced, and this "warp" is offset by the convex curved surface of the hot stamped surface 13, so that in the end, almost no "warp" occurs in the product.
It is possible to obtain a smooth decorative surface that is inconspicuous.

Although an embodiment in which this invention is applied to the cover member 2 of the control section of a television cabinet 1 has been described above, this invention is not limited to this, and can be used, for example, in various exterior panels of audio equipment and various decorations. It goes without saying that the present invention can be applied to plate-like members for other purposes.

As is clear from the above explanation, according to this invention, it is possible to prevent the occurrence of "warp" in the plate-shaped member due to hot stamping that involves pressurization and heating, and eliminates the straightening process after hot stamping that was conventionally necessary. In addition, the appearance quality of the product is improved.

[Brief explanation of the drawing]

Fig. 1 is a front view of a television cabinet showing an example of a member for hot stamping, Fig. 2 is a sectional view of a hot stamp sheet, and Fig. 3 is a lid member for a TV cabinet to which this invention is applied. Plan view,
FIG. 4 is a sectional view taken along the - line in FIG. 3. 2... Lid member (member for hot stamping), 1
DESCRIPTION OF SYMBOLS 1... Reinforcement rib, 12... Hinge part, 13... Hot stamped surface, 14... Back surface.

Claims (1)

[Scope of utility model registration request] A plate-shaped hot stamping member to which hot stamping is applied by applying pressure and heat, characterized in that the hot stamping surface and its back surface are formed into convex curved surfaces having a predetermined radius of curvature along the longitudinal direction. Warpage prevention structure for hot stamping parts.