JPH05116163A - Manufacture of grain pattern molded product - Google Patents

Abstract

PURPOSE:To form a grain pattern molding with high strength and an uneven attractive appearance. CONSTITUTION:The surface of film 2 is covered by glass fiber 3 impregnated with a soft clear resin 4. Then particles 5 for the formation of a grain pattern is allowed to attach to the surface of the glass fiber 3, and a tinted gel coat 6 is applied to the particles to form a sheet 1 for the formation of a grain pattern. Next, the sheet 1 is arranged on the surface of a molding die so that the film 2 side of the sheet 1 is oriented to the molding die side, and a molding material is laid on the sheet 1 for molding process. If the molding is completed, the film 2 is peeled off the cured molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a stone pattern molding.

[0002]

2. Description of the Related Art Conventionally, it has been proposed to form a stone pattern on a molded article such as a waterproof pan. For example, as disclosed in Japanese Examined Patent Publication No. 3-38092, a clear resin is applied to the surface of a sheet of polyester, etc., and a stone pattern forming granular material is adhered from above, and further a coloring resin is applied. It is cut into a shape, placed in a molding die with the sheet side facing the molding die side, and the molding material is laminated on the molding die for molding. Then, after molding, the sheet is peeled off from the molded body to mold the stone pattern molded body.

[0003]

However, since the clear resin in the stone forming sheet has a hardness such that the elongation upon curing is 3 to 5%, when the molding die has irregularities, It cannot be arranged on the uneven portion, and is arranged only on a flat surface. For example, it was not possible to form a natural stone-like uneven pattern as a non-slip material in a place where a waterproof pan is washed. Further, this clear resin has a problem that cracks are likely to occur and strength is insufficient.

The present invention has been made in view of the above problems, and forms a stone pattern molded article having strength and excellent designability capable of forming a stone pattern even on uneven portions. It is intended to provide a method for producing a stone pattern molded article that can be manufactured.

[0005]

According to the present invention, a glass fiber is laid on the surface of a film to impregnate a soft clear resin, and a stone-forming granule is attached to the surface of the film. Apply to form a stone forming sheet, place this stone forming sheet on the surface of the mold so that the film side faces the mold side, and overlay the molding material on this stone forming sheet. After molding and curing,
It is characterized in that the film is peeled from the cured molded article.

[0006]

[Function] A glass fiber is laid on the surface of the film and impregnated with a soft clear resin, and after the granules for forming stones are attached to this surface, a colored gel coat is applied to form a sheet for forming stones. .. Next, the stone forming sheet is placed on the surface of the molding die so that the film side faces the molding die side, and the molding material is overlaid on the molding material for molding. When the molding is completed, the film is peeled off from the cured molded product.

The molded product thus obtained can be shaped with irregularities such as non-slip to improve the design and the strength.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a stone forming sheet 1.
In this stone-forming sheet 1, glass fibers 3 are sprinkled on the surface of a film 2, a soft clear resin 4 is applied and impregnated, and the surface of the soft clear resin 4 has a granular stone or stone-like appearance. It is formed by evenly spraying the stone-forming particles 5 such as a granular resin having the above to adhere to the soft clear resin 4 and then applying the colored gel coat 6 to the surface thereof.

As the film 2, a release resin film such as a polyethylene film, a polyester film or a polypropylene film having a releasability with respect to the soft clear resin 4 can be used. Further, as the glass fiber 3, glass chop, glass mat, glass cloth or the like can be used and functions as a reinforcing material.

On the other hand, the soft clear resin 4 is a transparent thermosetting resin having flexibility (elongation upon curing is 5% or more), and is, for example, a polyester resin (CR-manufactured by Mitsui Toatsu Chemical Co., Ltd. 222) Stir with 100 parts by weight, curing agent (Permec M made by NOF Corporation) 1 part by weight, accelerator (cobalt octenoate) 0.5 parts by weight, transparent filler (M-50S) 40 parts by weight. Adjusted by In addition,
In addition to such polyester resin, vinyl ester resin or epoxy resin can also be used.

Further, when a molded product is manufactured using this stone forming sheet 1, the stone forming sheet 1 is arranged on the surface of the molding die 10 as shown in FIG. In this stone forming sheet 1, the film 2 is brought into contact with the surface of the molding die 10 in a portion where a stone pattern of a molded product is to be formed and the grain forming particles 5 are present on the surface side. Are arranged. Then, from the top of the stone forming sheet 1, S
After stacking a molding material 7 such as MC (sheet molding compound), an upper mold (not shown) and a lower mold 11 (not shown) of the molding die 10 are clamped, and are heated and pressurized to cure and mold. After the molding is performed in this manner, the molded product is taken out from the molding die 10 and the film 2 is peeled off from the molded product.

As a result, the grain forming granular material 5 in the grain forming sheet 1 remains in a state of being fixed to the surface of the molded product, and a grain pattern is formed on the molded product. In this case, the stone pattern can be formed on the molded product only in the portion where the stone pattern is desired to be provided. Then, the stone forming sheet 1
Has a softness and can follow the surface shape of the molding die 10, increasing the degree of freedom of the shape to be shaped, and at the same time improving the strength of the clear resin 4 and cracking the surface thereof. Can be prevented from occurring.

The concrete stone forming sheet 1 has a thickness of 50.
Glass chop 3 is sprinkled on the surface of polyethylene film 2 of μm, and polyester resin (CR made by Mitsui Toatsu Chemicals, Inc.
-222) 100 parts by weight, curing agent (Permec M made by NOF Corporation) 1 part by weight, accelerator (cobalt octenoate) 0.5
Parts by weight and 40 parts by weight of a transparent filler (M-50S) are mixed and stirred to prepare a soft clear resin 4 applied to a thickness of 0.2 to 1.0 mm for impregnation. Granite particles having a diameter of 1 to 3 mm are evenly applied as a grain-forming granular material 5 at an application amount of about 100 to 500 g / m ² and adhered to the soft clear resin 4, and then the surface is colored. Gel coat 6 0.2-0.3mm
It is formed by applying a film having a thickness of 2 and heating it to semi-cure it. The stone forming sheet 1 is continuously manufactured in a long size, and is punched into a predetermined size and shape for use.

When a waterproof pan is formed using such a stone forming sheet 1, the waterproof pan forming die 10 is formed so that the polyethylene film 2 side of the stone forming sheet 1 is the surface. The lower mold 11 is placed at a position corresponding to the washing area, and the SMC 7 is laminated on this. Then, the product was heated at 145 ° C. on the front surface side and 130 ° C. on the back surface side, and was pressed at a pressure of 1200 tons and molded for 4 minutes. Then, the molded product was taken out from the mold 10 and the polyethylene film 2 was peeled off to obtain a waterproof pan having a stone pattern on the washing area.
In this case, even if the molding die 10 has irregularities, since the clear resin sheet 3 of the stone forming sheet 1 has flexibility, it can follow the irregularities, so that a natural stone tone irregular pattern is formed. It can also be formed.

[0016]

As described above, according to the present invention, the clear resin in the stone forming sheet has flexibility, and the clear resin is impregnated with glass fiber to obtain a stone forming sheet. It is possible to impart shapeability that can follow the uneven pattern of the molding die, improve the design of the molded product, and facilitate positioning with respect to the molding die to shorten the molding cycle. Also,
By including glass fiber in the clear resin of the stone forming sheet, the strength can be increased and the occurrence of cracks can be suppressed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a stone forming sheet of the present invention.

FIG. 2 is a cross-sectional view showing a state of molding using the stone forming sheet of the present invention.

[Explanation of symbols]

 1 Sheet for Forming Stones 2 Film 3 Glass Fiber 4 Soft Clear Resin 5 Granules for Forming Stones 6 Colored Gel Coat 7 Molding Material 10 Mold 11 Lower Mold

Claims (1)

[Claims] 1. A sheet for stone formation by laying glass fibers on the surface of a film and impregnated with a soft clear resin, adhering granules for stone formation on the surface, and further applying a colored gel coat. Then, the stone forming sheet is placed on the surface of the forming die so that the film side faces the forming die side, and the forming material is overlaid on the stone forming sheet and cured, and then cured. A method for producing a stone pattern molded article, characterized in that the film is peeled from the molded article.