JPS61132314A - Manufacture of resin item with integral skin - Google Patents

Abstract

PURPOSE:To mold a resin item and its skin integrally, by embossing the cavity surface of a mold correspondingly to a pattern desired for the surface of the skin, arranging a skin material on the cavity surface, and molding a resin integrally with the skin. CONSTITUTION:In a case where an interior trim or the like of a vehicle is to be produced, a skin material 13 of a resin sheet of, for example, a soft or semi-rigid PVC is arranged between a stationary side male mold 2 and a movable side female mold 4 with the skin material 13 being strained, and then the movable side female mold 4 is moved to the male mold 2 to close the molds. Then a melted resin 14 is injected into a cavity 6 from an injection nozzle 9 positioned opposite to a core surface 3 of the male mold 2, so that a stitchlike relief or embossed surface formed on the cavity surface 5 is brought in firm contact with the surface 13a of the skin material 13 thereby forming a stitchlike pattern 30 or embossed patterns 31, 32 on the skin 23 integrally formed on the resin molded item 20.

Description

[Detailed Description of the Invention] (Industrial Application Field) - The present invention relates to a method for manufacturing a resin-molded article with an integral face and a face, and more specifically, the present invention relates to a method of manufacturing a resin molded product having a desired shape such as grains or stitches on the surface of the skin. The present invention relates to a method for manufacturing a one-sided resin molded product.

(Prior art) Generally eyes NJJ! BACKGROUND ART In skin-integrated resin molded products used for interior trims and other interior parts, those with patterns such as grains and stitches formed on the surface side of the skin are often used.

Conventionally, when manufacturing a resin-molded sheet with a surface wedge having surface wedges, a resin sheet made of soft or medium-hard PvC, etc., whose surface has been treated with patterns such as grains and stitches is formed in advance. This resin sheet is used as a skin material to make resin molded products by injection molding or press molding. By the way, in order to manufacture this skin-integrated resin molded product by injection molding, the Shishihiki material with patterns such as grains and stitches formed on the surface as described above is placed in both the male and female parts of the injection mold,
After the male and female molds are clamped, Bath M resin is injected from an injection nozzle through a sprue into the cavity formed by the male and female molds 1 to produce a two-sided integral resin having a pattern such as grain stitch on the surface of the skin. □I try to get the pleasure of shaping.

(Problem A to be Solved by the Invention) However, the above-described conventional method for producing a two-piece monolithic 11-fat molded product has the following points of concern.

First, the pattern formed on the resin sheet, which is the skin material, for example, the stitch wedge body * [Even if the injection bottom shape is made by matching the desired location of the integral resin molding, it will not be possible to mold the two molds together. Sometimes, the skin material is misaligned and patterns such as stitches are improperly positioned on the molded product's skin surface, causing it to be located at the O corner or the center of the flat surface of the molded product, making the product look bad. There was a problem.

Also, the same pattern was formed! ! ! Even if 51 materials are used, due to differences in conditions such as the temperature of the molten resin and injection pressure during injection molding, the skin material may be locally stretched and the grain may flow (extreme deformation of the grain shape) or the grain may disappear due to heat. In addition, such deformation of the epidermis surface may cause the product to have a poor texture during use, so it may not be possible to obtain a good feeling of use. There was also the problem that it was impossible to do so.

Furthermore, in order to produce an integral resin molded product with a pattern formed on the surface of the skin, even if the above-mentioned problems are overcome, there is still a process of forming patterns such as grains and stitches on the surface of the resin sheet, which is the skin material. This process requires two steps: injection molding or press molding the 5L material formed by this process to produce an integral resin molded product, and the workability is slow, resulting in an increase in manufacturing costs. was also invited.

An object of the present invention is to form a monolithic resin molded product that can form a desired velvety pattern in a desired position on the clothing side of a Ti anti-integral resin bottom-shaped product with good visibility and has a pattern on the surface of the skin in one step. The objective is to provide a method that allows the production of

(0 steps 111 to resolve the problem) The feature of the manufacturing method of the resin-molded product with molded skin according to the present invention to achieve the above object is that the cavity surface of the mold having a molding space is free from heat. ! ! After carving irregularities corresponding to the pattern to be displayed on the surface, the cost of the skin material IfI is applied to the cavity surface.
The resin molded product and its skin are integrally molded by arranging the shapes in a corresponding manner and then integrally molding the resin.

(Function) As mentioned above, on the cavity surface of the mold that integrally molds the skin material and the resin molded product material! ! The unevenness corresponding to the pattern on the skin surface is formed using i1M when integrating the skin material and the resin molded product material, for example when performing injection molding.
The skin material is pressed against the cavity surface by the pressure and heat of the resin, forming a pattern.For example, when performing press molding, a resin material that has been melted in a softening bath is placed in the cavity in advance, and this is applied to the skin material. This is because the skin material is pressed against the cavity surface due to the pressure applied to the surface of the cavity, forming a pattern, as in the case of injection molding.

In this way, the surface pattern of the skin can be formed in one step when integrating the skin material and resin without having to form a pattern on the skin material in advance. Since the pattern does not suffer from misalignment or graining unlike conventional methods, this method provides a two-sided integral resin molded product that looks good and is comfortable to use.

(Example) The following is related to the present invention! ! ! An example of a method for manufacturing an anti-integral resin molded product will be described in detail with reference to the drawings.

1 to 3 show an embodiment of the present invention, and FIG. 1 is a perspective view of a mold used in the manufacturing method of the present invention;
FIG. 2 (bl) is a manufacturing process diagram for manufacturing a one-piece resin molded product using the mold, and FIG. 3 is a perspective view of the one-piece resin molded rmo manufactured by the present invention.

In this embodiment, a case will be described in which injection molding is used to manufacture a skin-integrated resin molded product, for example, a vehicle interior trim.

First, as shown in Fig. 1, the male mold 2 on the fixed side of the #C mold 1
Core side 5 and possible! Cavity surface 5 of male mold 4 on IIb side
A molded air barrier 6 is formed by this. A sprue 7 is drilled in the m-type 2 shown in FIG. A spherical nozzle receiver 8 is formed in the nozzle receiver 8, and an injection nozzle 9 for injecting resin in a bath-molten state into the cavity is connected to the nozzle receiver 8.

The cavity surface 5 of the female W4 has stitch-like irregularities 10 corresponding to the stitch pattern for forming a stitch pattern on the epidermis, and grain-like irregularities 11° 12 corresponding to the pattern for forming a grain pattern on the epidermis. is formed. The stitch-like unevenness 10 and the grain-like unevenness 11 and 12 can be formed at the same time when manufacturing the female mold 4 by a casting method, a metal spraying method, etc., or can be formed by chemical treatment such as etching or engraving with a cutting tool. The female mold 4 was manufactured using the mold.

The molten resin 14 is integrated with the skin material 13 using the molding m1 having the above structure! ! The process of forming a pattern on the opposite surface will be explained.

First, as shown in Fig. 2 (al), between the facing surfaces of the fixed side 21 mold 2 and the flexible 11+91 female mold 4 facing this jliW2, a skin material made of a resin sheet such as soft or semi-hard PvC is inserted. 13 is placed in a tensioned state with the holding jigs 15, 15, and the female mold 4 on the movable side is moved in the direction of the male mold 2 using CO to thin the mold. At this time, the WBj and X materials 13 are melted. If the same base material as the resin 14 is used, no processing will be applied to the skin material 13, but if a different base material is used, there will be no processing between the skin material 13 and the molten resin 14. To improve the adhesion of the skin material 13, apply a dressing agent in advance.
(It is also possible to apply it to the back side of D, that is, the side of the miscellaneous goods 2, or to attach a fabric such as knit.Also, it is preferable that the front side of the skin material 15, that is, the female mold 4ga, be a flat surface, but a shallow grain pattern may be applied. *If n, the depth of the grain is 1211
111 or less), there is no problem in implementing the present invention. Further, the surface ssB of the skin material 150 corresponds to the cavity If15, but in order to improve the extensibility of the surface FL material 15, it may be heated and softened in advance.

Next, as shown in Figure 2 (bl), the core IfII of 1s type 2
Molten resin 14 is injected into the cavity 6 through the sprue 7 from an injection nozzle 9 provided on the opposite side of +3. The molten resin 14 is injected toward the back side If+13b of the skin material 15 arranged on the cavity surface 5 on the side of the fiber @14 of the cavity 6, and the stitch-like unevenness 10 and the grain-like unevenness 11 formed in the cavity l1i5 are injected. Make the surface 15a of the skin material 1s densely layered on .12! ! ! In addition to forming a pattern on the surface, as shown in FIG.
0 face 23C) face rrJ#ζ stitch fight a! 30 and grain patterns 51 and 52 can be formed. Furthermore, code 25:
1 is the terminal in Table y, 23 before terminal processing is performed.

The outer appearance of the front integrated resin molded product 20 formed as described above has a stitch pattern 50 or a grain pattern at desired locations [51, 52].
is formed, and the pattern has no misalignment or unevenness, giving it a beautiful appearance. Incidentally, a heat resistance test (8
Even after leaving the molded product at 0° C. for 72 hours, there was no change in the pattern on the hexagonal surface before and after the test, which was extremely good, and a molded product with stable quality could be easily obtained.

Effects specific to the embodiment described above will be described below.

First, injection molding R--general, cavity rk
J5 with outer skin material 13 facing 13. scorching, aHki
Since the molten resin 14 is injected from the 13b119 to perform integral molding, the skin material is softened by the heat of the molten resin even if the skin material is not heated and softened in a separate process in advance, resulting in poor millet production. Further improvement can be achieved.

In addition, in the above-mentioned actual Nfl, the fixed side of the mold is configured as a male mold and the movable side is configured as a female mold, and a method of manufacturing a skin-integrated resin molded product using this mold was explained, but the present invention does not apply to this method. Not limited to JR [ as fixed side, male type is possible
It may also be th11111.

By using a mold configured in this manner, the core circle of the movable male mold 141 presses the skin material toward the cavity on the fixed side when the mold is clamped, so that the skin material can be quickly and easily placed toward the wrinkle cavity. Definitely □It has the unique effect of being able to be performed in the east.

Also, the above 5j! Although the embodiment has been described as applying four injection bottoms, the present invention is not limited thereto, and the skin material and the resin molded product may be integrated by press molding or foam molding. If the shapes are to be integrated, it is necessary to apply a pressure of 2 or more on the molding pressure blade side.
The inventor's tests have confirmed that the manufacturing method of the present invention can be applied as long as the molding pressure is desirably 20 to 9/am' or more.

(Effects of the Invention) As explained above, according to the method for manufacturing a birch bark integral resin molded product according to the present invention, the following effects are achieved.

First, it is possible to reliably attach a pattern to the desired position of a skin-integrated resin molded product with a 6c pattern on the surface, preventing problems such as misalignment in special stitch patterns and grain drift in grain patterns. Therefore, it is possible to obtain a molded product that has a beautiful appearance and a good feel, and also provides a method for manufacturing a product with stable quality.

In addition, conventionally, the resin sheets used as skin materials were previously applied with a different method, but this step can be omitted, and the two-step process is now one process. Therefore, it is possible to improve work efficiency and reduce manufacturing costs associated with this.

[Brief explanation of drawings]

Figures 1 to 3 show an integral resin molding 6b according to the present invention.
〇-Real’IN? This is to explain II.
The figure is a perspective view of the mold applied to the manufacturing method, Figure 2-(b
1 is a process diagram of the manufacturing method, and FIG. 5 is a perspective view of a skin-integrated resin molded product manufactured by the manufacturing method of the present invention. , 1... Molding mold, 5... Cavity prisoner, 6... Molding space, 10... Stitch-like unevenness, 11.12...
Grain-like unevenness, 13...Skin material, 153...Surface,
13b...long surface, 14...I@molten resin, 20...
Resin molded product, 23...Skin, 30...Stitch pattern, 51, 32... Grain pattern.

Claims (1)

[Claims] (1) After carving irregularities corresponding to the pattern on the surface of the skin on the cavity surface of a mold having a molding space, the surface side of the skin material is placed so as to correspond to the cavity surface, and then the resin is integrally molded. A method for producing a skin-integrated resin molded product, characterized in that the resin molded product and its skin are integrally molded by doing so.