JPH0415107B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stamping method for performing metal surface treatment on the surface of a synthetic resin material using a stamp material.

Conventionally, a flat metal plate was used as a decorative plate, and the decorative surface of the plate was diamond-cut (polished) with diamonds.

First, I will explain the outline of this diamond cutting method in the first part.
This will be explained with reference to FIGS. 2A and 2B.

In these figures, reference numeral 1 denotes an aluminum plate serving as a decorative plate, and a convex portion 2 for forming letters or the like is provided in a portion to be diamond cut, and a surface 3 to be diamond cut is formed. Reference numeral 5 denotes an arm that is rotated at high speed by a motor or the like around a support shaft 6, and a diamond 7 for making a diamond cut is fixed to the tip of the arm. Incidentally, numeral 4 indicates a diamond-cut surface as shown in FIG. 2b.

To perform diamond cutting with the device shown in Fig. 1, first, the arm 5 is rotated at high speed by a motor connected to the support shaft 6, and the aluminum plate 1 is moved in the direction of the arrow. 1 convex part 2
Scrape the surface 3 of. As a result, Figure 2 a, b
As shown in the enlarged view, a convex portion 2 provided on an aluminum plate 1
The surface 3 becomes a concentric arc-shaped diamond cut surface 4 and has a luster, so that it can be used as a decorative board.

When the decorative plate is formed as described above, aluminum plate 1
Diamond cut surface 4 with diamond 7 on surface 3 of convex portion 2 of
This makes the decorative plate expensive and requires a lot of man-hours to manufacture.Furthermore, if the trajectory of the groove on the diamond cut surface 4 is to be made straight, the arm 5 must be lengthened, which makes the device difficult to use. It had drawbacks such as being large.

This invention was made in view of the above points, and a stamp material having at least a metal layer and an adhesive layer is placed on the surface of a molded synthetic resin material and heated to a predetermined temperature. In the stamping method, in which characters or patterns with a metallic feel are printed on the surface of a synthetic resin material by applying pressure with a die, a large number of diamond cut grooves are formed on the pressing surface of the die, and the material is pressed with the surface of the diamond cut grooves. In particular, the surface of the synthetic resin material and the stamp material are bonded to each other with an uneven surface, and characters in a diamond cut pattern with a metallic feel are printed on the surface of the synthetic resin material. The present invention will be explained below based on the drawings.

3, 4, and 5 are a side view, an enlarged cross-sectional view, and a side view, respectively, showing a die, a stamp material, and a molded synthetic resin material for decoration used in the stamping method of the present invention.

Reference numeral 11 shown in FIG. 3 is a die, and the die 11 is provided with a base 12 having a built-in heat source (not shown) and a linear diamond cut pressing surface 15. In addition, the depth of the groove of the unevenness of the diamond cut pressing surface 15 is formed to be 3 μm or more.

Reference numeral 16 shown in FIG. 4 is a commercially available stamp material, which is composed of a polyester layer 17, a silicone layer 18, a top layer 19, an aluminum layer 20, and an adhesive layer 21.
It is possible to peel it off. The thickness of the polyester layer 17 is 16 to 25 .mu.m, the total thickness from the silicon layer 18 to the adhesive layer 21 is 5 to 10 microns, and the silicon layer 18 and top layer 19 are transparent.

22 shown in Fig. 5 is a molded synthetic resin material,
Convex portions 23 for forming characters, etc. are formed in the portion to be subjected to metal surface treatment, and a surface 24 to be subjected to metal surface treatment is formed.

Next, a stamping method for performing metal surface treatment according to the present invention will be described with reference to explanatory views of FIGS. 6a, 6b, and 6c.

First, the stamp material 16 is placed on the synthetic resin material 22 as shown in FIG. Press it against the synthetic resin material 22 for about 1.5 seconds as shown in Figure 6b. Stamp material 16 is metal plate 1
The heat of the metal plate 13 is transferred to the synthetic resin material 22 by adapting to the unevenness of the diamond cut pressing surface 15 of No. 3, and the convex portion 2
The surface 24 of 3 is softened and becomes the diamond cut pressing surface 15.
The stamp material 16 is formed in the same shape as the synthetic resin material 22, and the stamp material 16 is bonded only to the convex portion 23 of the synthetic resin material 22 by the adhesive layer 21. After that, when the die 11 is removed and the stamp material 16 is peeled off from the synthetic resin material 22, the adhesive layer 21 adhered to the convex portion 23, the aluminum layer 20, the top layer 19, and the silicone layer 18 on top of the adhesive layer 21 are left behind. Layer 17 can be peeled off together with stamp material 16. As shown in FIG. 6c, metal surface treatment can be applied to the surface 24 of the convex portion 23 without sagging around it.

When the metal surface is treated by the stamping method of the present invention as described above, the convex portions 2 of the synthetic resin material 22 are
Metal surface treatment can be easily applied only to the surface 24 of 3.
Sharp and linear unevenness can be formed as if a diamond cut has been applied, and light can be reflected by the aluminum layer 20 to add a metallic feel. Incidentally, the top layer 19 serves both to prevent oxidation of the aluminum layer 20 and to protect the surface thereof.

FIG. 7 is a side view showing another example of the metal plate used for the die.

In FIG. 7, reference numeral 14 denotes a convex portion for forming characters, etc. provided on the metal plate 13, and a diamond cut pressing surface 15 is provided on the surface thereof.

When such a metal plate 13 is used as a die and stamped by the method described above, the metal surface is treated according to the protrusions 14 of the metal plate 13 even if the synthetic resin material serving as the decorative material does not have protrusions. is applied, so the surface of the synthetic resin material may be a flat surface.

FIG. 8 is an enlarged side view showing still another example of a metal plate used for the die.

In FIG. 8, 15A is a diamond cut pressing surface provided on the metal plate 13, and the intersection of the inclined surfaces forming the diamond cut surface is formed at an especially acute angle.

When applying metal surface treatment to the surface of a synthetic resin material using the diamond-cut pressing surface 15 of the metal plate 13 shown in FIGS. 3 and 7, the intersection of the inclined surfaces of the metal surface treatment may become rounded. In some cases, unevenness cannot be formed sharply. However, when the diamond cut pressing surface 15A shown in FIG. 8 is provided on the metal plate 13, the roundness of the metal surface treatment part of the synthetic resin material at the intersection of the slopes is corrected, and even sharper unevenness is formed. be able to.

As explained above, the stamping method of the present invention involves placing a stamp material consisting of multiple layers including an adhesive and a metal layer on the surface of a synthetic resin material, and pressing a die heated to a predetermined temperature. In a stamping method that prints a metallic pattern on the surface of a synthetic resin, diamond cut grooves are formed on the surface of a pressurizing die, and this die creates an uneven surface between the synthetic resin surface and the stamping material. Because they are bonded, the bonding area is wide and the characters or patterns stamped on the surface of the synthetic resin do not easily peel off.

Further, there is an advantage that a diamond cut surface with a metallic feel can be easily formed on printed characters or patterns, and the cost of decorating equipment can be reduced.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the conventional diamond cutting method, Figures 2a and b are enlarged plan views and cross-sectional views taken along line A-A of the diamond cutting surface, Figures 3 and 4.
Figure 5 is a side view, enlarged cross-sectional view, and side view respectively showing the die, stamp material, and synthetic resin material used in the stamping method of the present invention, and Figures 6 a, b, and c are explanatory diagrams of the stamping method. 7th
8 are side views showing other examples of the dice. In the figure, 11 is a die, 12 is a base, 13 is a metal plate, 15 and 15A are diamond cut pressing surfaces, 16 is a stamp material, 22 is a synthetic resin material, 23 is a convex part, 2
4 is the surface.

Claims (1)

[Scope of Claims] 1 A stamp material comprising a plurality of layers including at least a metal layer and an adhesive layer is stamped into a predetermined area of a synthetic resin material by a die having a pressing surface formed of a metal plate and means for heating the die. In the stamping method in which the die is mounted at a certain position and pressurized with the die, a large number of diamond cut grooves are formed on the pressing surface of the die, and the pressure of the pressing surface causes the synthetic resin material and the stamp material to be bonded together. A stamping characterized in that the metal layer of the stamp material, which is a diamond cut surface, is bonded to form the uneven shape of the diamond cut groove, and is printed as a graphic character on a predetermined position of the synthetic resin material. Method.