JPS6053692B2 - Method for manufacturing resin pine with color pattern - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a resin mat having a color pattern.

Resin mats are used to remove mud from shoes.

This mat has a structure in which a large number of needle-like protrusions are densely grown on the surface of the sheet, and unevenness is provided on the back surface to prevent slippage, and is integrally molded from resin. To make this mat, the following was done. That is, first, a mold with a large number of needle-shaped depressions corresponding to the surface of the mold is prepared, and molten resin is poured into this mold to infiltrate the resin into the depressions and form a continuous sheet part. While the sheet was still soft, the exposed surface of the sheet was pressed with a mold having irregularities corresponding to the back surface, and after cooling, the sheet was peeled from the mold. Since resin mats are manufactured in the manner described above, it is difficult to display partially different colors, and therefore mats with patterns of different colors are difficult to manufacture. Ta.

In particular, mats are used with the side with needle-like protrusions facing up, so if they display different colors,
The color must be visible from the side where the needles are present. However, such materials cannot be printed after molding. Therefore, conventionally, mats having patterns of different colors have been produced, for example, in the following manner. One method is to cut out the desired pattern from a single mat,
Cut out the same pattern from a similar mat in a different color,
The cutouts of the latter mat were fitted into the cutouts of the former mat, and the seams were bonded with adhesive.

However, this method has the disadvantage that the bonding work is time-consuming and requires skill. As another method, after fitting the cutout piece as described above, a resin sheet was brought into contact with the back side of the piece with a heated wire mesh interposed therebetween, and the sheet was welded. However, the mat obtained by this method has the disadvantage that it is easily deformed due to the difference in expansion coefficient between the resin and the wire mesh. As another method, after fitting the cutout pieces as described above, a sheet is brought into contact with the back side and heat welded, or a sheet of molten resin is extruded onto the back side and this is fitted. A method was used in which the parts were overlapped and welded. However, according to this method, air remains in the concave portions of the unevenness on the back surface of the mat, and welding is performed only on the convex portions, so that the strength is poor. Therefore,
There was a demand for a more convenient patterning method.

This invention was made in response to such a demand. Instead of extruding the resin as a single sheet and welding it, the inventor adopted a method in which the resin was extruded into multiple lines and the lines were crushed on a mat to form a sheet. It was confirmed that the welding of the cutout part was sufficient. This invention was made based on such confirmation. This invention involves cutting out figures or characters from a resin mat having dense needle-like protrusions on the surface and unevenness on the back side, cutting out the same figures or characters from similar mats of different colors, and cutting out the same figures or characters from the former mat. Insert the cutout piece of the latter mat into the hole, extrude the molten resin in multiple lines onto the back side of the mat, let the resin straddle the cutout line, and while the resin is still soft, press it with a cooling roll to cut out the mat. This method of manufacturing a resin mat having a color pattern is characterized by infiltrating the resin into the concave portions of the unevenness along the lines, making adjacent resins continuous, and welding and hardening them.

The method of the present invention will be explained as follows based on the drawings. FIG. 1 is a partially cutaway perspective view showing one embodiment of the method of the present invention. In FIG. 1, reference numeral 1 is a resin mat, the surface of which is densely covered with long tapered needle-like protrusions 11, and the back surface of which is provided with unevenness to prevent slipping, consisting of recesses 12 and projections 13. It is being As shown,
The convex portions 13 may be continuous in a grid pattern, or conversely, the concave portions 12 may be continuous.
may be consecutive. In addition, the recessed portion 12 or the convex portion 13
The shape may be polygonal or circular. Furthermore, the concave portions 12 and the convex portions 13 may be arranged irregularly. A figure is cut out from this mat 1, and a cutout piece 2 having the same figure shape cut out from a similar mat of a different color is fitted into a cutout hole surrounded by the cutout line 14.

You can cut out letters instead of figures. Ethylene-vinyl acetate copolymer or soft vinyl chloride resin is suitable as the resin for forming the mat 1 and the cutout piece 2. Place the mat with the above-mentioned cutout piece 2 fitted with the back side facing upward, so that it straddles the cutout line 14.
The molten resin 3 is extruded into a linear shape.

It is desirable that a plurality of molten resins 3 be extruded so as to be lined up in parallel. These can be extruded in multiple pieces at the same time.
It may be extruded sequentially. To extrude the molten resin 3, it is convenient to use an extruder or a hot melt machine (none of which is shown). As the resin, it is preferable to use a resin of the same quality as the mat 1. While the extruded molten resin 3 is still soft, it is pressed with a roll 4 to cause the resin to enter the recess/portion 12 along the cutout line 14.

At the same time, the resin is spread in a sheet shape on the convex portion 13 to make adjacent resins continuous. At this time, since the resin is extruded in a linear shape, the air in the recess 12 escapes from between the linear resin. Therefore, between the pressed resin and the mat,
This prevents air bubbles from remaining. In order to press the resin 3, it is preferable to place the mat 1 on a stand (not shown) and move it under the roll 4. In this way, the resin is welded across both sides of the cutout line 14, thereby firmly fixing the cutout piece 2 to the mat 1. According to the method of this invention, the molten resin is extruded onto the back surface of the mat and is pressed with a roll to be welded and hardened, so that the cutout pieces and the mat are easily combined.

At this time, since the resin is extruded in a linear manner, when the resin is pressed, the resin easily enters the recesses of the unevenness on the back surface of the mat, and no air bubbles remain between the mat and the resin. Therefore, the adhesive strength is high. In addition, since the linearly extruded resin is pressed to form a continuous sheet, when used as a mat,
I don't feel any discomfort even if I sit on top of it. This mat contains graphics or letters of different colors, thus increasing the decorative and advertising effect. Moreover, the inventive method can be implemented using commonplace equipment. Therefore, this inventive method is
It has extremely high practical value.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing one embodiment of the method of the present invention. In the figure, 1 is a mat, 2 is a cutout piece, 3 is a molten resin, 4 is a roll, 11 is a needle-shaped projection, 12 is a recessed part, 13 is a convex part, and 14 is a cutout line.

Claims (1)

[Claims] 1. Cut out a figure or letter from a resin mat with dense needle-like protrusions on the surface and unevenness on the back side, cut out the same figure or letter from a similar mat of a different color, and insert the latter into the cutout hole of the former mat. Insert the cutout pieces of the mat, extrude the molten resin in multiple lines onto the back of the mat, let the resin straddle the cutout lines, and while the resin is still soft, press it with a cooling roll to extrude it along the cutout lines. A method for manufacturing a resin mat having a color pattern, which comprises infiltrating a resin into the concave portions of the uneven surface, making adjacent resins continuous, and welding and hardening the resin.