JPS60232934A - Manufacture of fiber reinforced plastic molded product with decorations and/or patterns - Google Patents

Abstract

PURPOSE:To devise mass production of fiber reinforced plastic (hereinafter called ''FRP'') molded products with decorations and/or patterns by the following method; different colored pieces of FRP plates are fixed on a mold, and gel-coated resin of a base color is applied in their surrounding areas, and FRP lamination is carried out after hardening of the resin. CONSTITUTION:A colored FRP plate A is one of the ordinary FRP plates consisting of a colored gel-coated layer a1, middle layer a2 and a back-up layer a3, and is molded by hand lay-up or pressed into shapes respectively for colors of patterns and decorations. A colored FRP plate A (for instance) is cut out in accordance with the structural shapes of their patterns or decorations and the piece A1 for the color concerned is made and it is fixed on a mold B. In the above case, the piece A1 for respective color is fixed with a double adhesive backed tape 11 which is arranged to provide edging all around the edge touching the mold area (b) of colored gel-coat a1. A colored gel-coat layer c1 which becomes a base is applied over the mold area (b) with the exception of the area upon which the colored piece A1 is placed, and after hardening, the middle layer c2 and the back-up layer c3 are laminated on the whole of the mold area (b) including the portion for the piece A1; and a FRP product is obtained after release from the mold subsequent to hardening.

Description

Detailed Description of the Invention The present invention relates to an FRP molded product having a picture or pattern, such as an FR molded product that appeals to the user's beauty through visual perception and improves the product value.
This invention relates to a method for manufacturing P molded products.

Generally, when applying pictures or patterns to FRP molded products, the following steps are performed. “■ Mark the mold in advance for each color that will make up the pattern or picture.

■ Apply a masking sheet such as plastic film with a pattern or picture shape cut out or cut out using adhesive tape or double-sided tape along the marking lines for each color and each part to be painted, and place it on the surface of the mold other than the pattern or picture. Masking is also applied.

■ Peel off the first color masking sheet from the pattern and ring and apply colored gel coat.

■ After painting, peel off the second color masking sheet.

■ After the first color gel coat is cured, apply a second colored gel coat.

■ Repeat the steps ■ and ■ for each color and finally apply the FRP.
Stack.

However, the above conventional method causes the following problems.

■ In the case of multi-colored patterns or designs, it is necessary to cure the gel coat for each color, which lengthens the construction period and prevents mass production.

■ Since the masking sheet must be removed while the gel coat is uncured, the outlines of patterns and pictures are disturbed, resulting in poor appearance, which can easily lead to deterioration in product value.

■ The timing and method of peeling off the masking sheet requires skill and requires an experienced person.

A technical problem of the present invention is to eliminate the need to apply gel coat for each color that makes up a pattern or picture.
The object of the present invention is to provide a method for manufacturing FRP molded products with pictures and patterns that can eliminate all of the above-mentioned problems.

The basic method to achieve this purpose is to use colored FRP
After cutting the board into the same shape as the parts of the same color that make up the pattern or picture to form colored pieces, each colored piece is fixed on a mold to make up the pattern or picture, and a base is placed around it. A gel coat resin of a different color is applied, and after the gel coat resin is cured, an FRP layer is applied and the mold is removed.

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

The first step is to form colored FRP boards (A>) for each color that makes up the pattern or picture.

The colored FRP board (A) is a general FRP board consisting of a laminated structure of a colored gel coat layer (al), an intermediate layer (a2), and a back-up layer (a3), and is hand laid up for each color that makes up the pattern or picture. It is molded using methods such as or press molding. Regarding the wall thickness of this colored FRP board (A), the minimum wall thickness is set to 0.5 m or more in consideration of cracking during demolding, cracking during cutting, and warping.

The second step is to cut each colored FRP board (A) into the configuration shape of a pattern or picture to form colored pieces (A1).

The colored pieces (A1) are formed by cutting each colored FRP board (A) into the same shape as each color constituting the pattern or picture. In addition, this colored strip (A1) has a picture of an animal (hippo) in the drawing shown in the example, so it also has a face (1), a torso (2), legs (3), pants (
4〉, Each part of the nails (5), eyes (6), ears (7), and nose (8) are individually colored FRF boards (A) in the same or different colors.
Cut and form using... In addition, when cutting out this color-coded piece (A1), it can be done by using a paper pattern having the same outline as the face (1), body (2), etc., or by scribing, etc. There are possible ways.

The third step is to fix the colored pieces (A1) onto the mold (B) so as to form a pattern or picture. The mold (B) is a mold for the hand layup method, and this molding surface (b
) on which the colored gel coat layer (al) side of the colored strip (A1) is brought into contact, and using an ultra-thin double-sided adhesive tape (11), cover each colored strip (A1) with pre-marked marks. Fix it along the pattern. In this case, each colored piece (A+) is fixed via a double-sided adhesive tape (11) arranged so as to border the entire circumference of the contact edge of the colored gel coat layer (al) surface with the molding surface (b). It is mandatory that

This is because gel coat resin is applied to the molding surface (b
) and the colored gel coat layer (al), and also to allow the FRP molded product to be easily removed from the mold (B) during demolding.

The fourth step is to apply a colored gel coat layer (CL) as a base to the surface of the molding surface (b) excluding the colored strip (A1), and after curing, the entire molding surface (b) including the colored strip (A+) to the middle layer (
C2), a back-up layer (C3) is laminated, and after curing, the mold is removed to obtain an FRP molded product (C). In addition, in order to avoid the occurrence of large steps that would impede defoaming work when laminating the back-up layer (C3), it is recommended to use colored pieces (A+) with a thickness of 3 mm or less even at their thickest. preferable.

Incidentally, the FRP molded product manufactured according to the present invention consists of a shower area (C+), a climbing slope (C2) connected to the shower area (C1), and a water bath (C3) connected to the slope (C2). Although a child's pool is illustrated, the present invention is not limited to such molded products; it goes without saying that any FRP molded product can be manufactured, and FRP molded products with different designs and designs can be produced in the same way.

In addition, among the parts that make up the pattern or picture, for example, as shown in the drawing, extremely small parts such as the eyeball (9) and the joining line between the upper and lower lips (10) are colored after being removed from the mold. It's okay. By the way, double-sided adhesive tape (11) is F when demolding.
The mold is removed while remaining attached to either the RP molded product (C) or the mold (B), but since it is tape-like, it can be easily peeled off, and the FRP molded product (C) or the mold (B) can be removed easily. B) will not be adversely affected.

As described above, the present invention molds colored FRP boards for each color that makes up a pattern or picture, and cuts each colored FRP board into the same shape as the same color part that makes up the pattern or picture to produce colored pieces. After forming, these colored pieces are fixed on a mold to form a pattern or picture, and a gel coat resin of the base color is applied around them, and after curing, an FRP layer is applied and the mold is removed7. Because of its unique features, it is possible to apply the various types of colored gel coat resin that make up patterns and pictures to each FRP molded product while waiting for it to harden, and to remove the masking sheet that requires skill each time the colored gel coat resin is applied. FRP molded products with pictures and patterns can be mass-produced without the need for such products, and without prolonging the production period because the outlines of the patterns and pictures appear sharply.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

The drawings show examples of the manufacturing method of the present invention, and FIGS.
The figures show the manufacturing process, Figure 1 is a plan view showing the cutting process of colored pieces, Figure 2 is an enlarged sectional view (2)-(2), and Figure 3 is a pattern on the molding surface of the mold. Figure 4 is a (4)-(4) sectional view, Figure 5 is a partially enlarged view of Figure 4, Figure 6 is FRP. FIG. 7 is a partially enlarged view of FIG. 6, and FIG. 8 is a perspective view of the molded product. In the figure (A) Two-color FRP board (A+): Colored piece (B): Molding mold

Claims (1)

[Claims] Colored FRP boards are molded for each color that makes up the pattern or picture,
After cutting each colored FRP board into the configuration shape of a pattern or picture to form colored pieces, these colored pieces are fixed on a mold to form a pattern or picture, and the surrounding area becomes a base. A method for manufacturing FRP molded products with pictures and patterns characterized by: painting a colored gel coat resin, applying a predetermined FRP layer after the gel coat resin hardens, and removing the mold.