JPH0563293B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention is capable of molding an FRP molded product with flush seams by providing a groove in a mold.
Concerning the method of molding FRP molded products.

[Background technology]

BACKGROUND ART In recent years, a wide variety of items, such as housing-related equipment such as bathtubs, and the bodies of automobiles and aircraft, have been manufactured by integral molding using fiber-reinforced plastics, so-called FRP. On the other hand, in order to produce colored integrally molded products, so-called FRP is usually white, so a colored material such as gel coat resin is applied to the molding surface of the molding frame, and then a colored material such as gel coat resin is applied.
A base material made of a resin such as unsaturated polyester or epoxy and a reinforcing material such as glass fiber or carbon fiber are laminated and molded.

On the other hand, especially in housing-related equipment, color-coded patterns are applied to the surface of molded products in order to improve their appearance. However, conventionally, in order to create a color-coded pattern, masking tape was previously applied to the mold along the seams such as color boundaries, one material was applied, the masking tape was peeled off, and the other material was applied. A seam is formed by attaching the
Masking tape requires a high degree of skill in terms of timing and method of peeling, and sometimes the seams become disordered, impairing the appearance, and productivity is also low.

Therefore, the present applicant arranged a seam member along the seam according to the specification and drawings of Japanese Patent Application No. 59-183442 and drawings (Japanese Unexamined Patent Publication No. 61-61832), and used the seam member to connect the materials on both sides. We proposed an FRP integral molded product that can improve the appearance of joints and increase productivity by connecting them.

Although this proposal has solved the above-mentioned problems to a considerable extent, as shown in Figures 10 and 11, the joint member A is attached to the mold B using double-sided adhesive tape C. Therefore, when the molded product was taken out, there was a risk that a shallow recess E in the thickness of the tape C would occur between the materials D and D, and that the material would sometimes protrude into the stepped portion, disturbing the seam line.

[Purpose of the Invention] The purpose of the present invention is to provide a method for molding an FRP molded product that can solve the above-mentioned problems by providing a mold with grooves along the joints so that the outer surface can be formed flush and flat. There is.

[Disclosure of the invention]

An embodiment of the present invention will be described below based on the drawings.

The method for molding an FRP molded product is to form a groove 7 along the seam 3 in a mold 4 for molding an integral FRP molded product 1 having a seam 3, and to form grooves 7 in the groove 7 with the outer surface of the mold 4. A tape 9 is attached with the adhesive surface 8 flush with the adhesive surface 8, and the materials 5A and 5B on both sides of the seam 3 are connected to the joint member 6 attached to the adhesive surface 8, and attached to the mold 4. In this embodiment, the FRP molded product 1 forms the bathtub 2.

The bathtub 2 has a rectangular shape, with a horizontal piece 17 facing outward and a hanging piece 1 hanging at the outer end of the container part 15, which has a side wall 13 raised around a rectangular bottom plate 11.
9 and a flange portion 23 extending horizontally outward at its lower end.
A collar portion 21 is provided.

In this example, the seams 3 are color borders, and a total of three seams 3A, 3B, and 3C are formed around the bathtub 2 at the center of the hanging piece 19 and at the position dividing the side wall 13 into three parts. .

As schematically shown in FIG. 3, the mold 4 has a raised portion 29 formed around a trapezoidal base portion 25 via a groove bottom portion 27, and the container portion 15 is formed by the base portion 25. Also, the flange portion 21 is formed by the groove bottom portion 27 and the raised portion 29.

Further, the groove 7 includes grooves 7A, 7B, and 7C formed on the outer surfaces of the raised portion 29 that fits the seam 3A, and the side wall of the base portion 25 that fits the seams 3B and 3C. In this example, the grooves 7A to 7C have the same shape, and are shallow and flat U-shaped grooves having the same width and thickness as the tape 9.

The tape 9 has an adhesive surface 8 on its outer surface to which the joint member 6 is attached, and in this embodiment, both the inner surface facing the grooves 7A to 7C and the adhesive surface are adhesive surfaces 8A. Adhesive tape is used. Further, the tape 9 has the concave grooves 7A to 7C having the same shape as the tape 9 as described above, and by fitting the tape 9 into the concave grooves 7A to 7C and attaching it using the adhesive surface 8A, The adhesive surface 8 is flush with the outer surface of the mold 4, and as shown in FIG. 9, the tape 9 can fill the grooves 7A to 7C.

Further, the joint member 6 is attached and attached to the attachment surface 8.

The joint member 6 is made of a flexible and easily colored synthetic resin such as polystyrene or polyethylene, and as shown in FIG.
An engaging portion 10 consisting of a locking groove formed by continuously cutting out a V-shaped side surface on both sides of a long string-like base body 31 having approximately the same width as that of the concave grooves 7A to 7C; 1
0 is formed. Note that the width of the joint member 6 can be made wider or narrower than that of the tape 9. Further, the joint member 6 may be made of an elastic material such as rubber, or metal such as aluminum.

As shown in FIGS. 5 and 9, the seam member 6 is attached to the adhesive surface 8 of the tape 9 attached to the grooves 7A, 7B, and 7C, and is aligned with the position of the seams 3A, 3B, and 3C. Distributed all around.

Further, the seam member 6 is connected to both sides thereof with materials 5A and 5B that sandwich the seam 3 and are engaged with the engaging portions 10.

In this embodiment, the materials 5A and 5B are so-called gel coat resins that color the surface of the bathtub 2 and form the surface layer A of the FRP, and are colored in different desired colors.

The materials 5A and 5B are the outer surface between the open end of the upright portion 29 of the mold 4 and the joint member 6, and the joint members 6, 6.
One of the materials 5A is applied in advance to every other outer surface surrounded by the joint member 6 of the base 25.

Note that in this example, the joint members 6, 6 surrounding the groove bottom 27
The material 5A is applied in advance to the surface in between (as shown in FIG. 6).The material 5A fills the engaging portion 10 and reaches the upper surface of the joint member 6 from the inner edge to the vicinity of the opposite edge. The material 5A is connected to the seam member 6 by applying the material in the area. In addition, the other material 5B, as shown in FIG.
is applied so as to overlap with the material 5A on the upper surface of the seam member 7, and is connected to the seam member 6 to form the surface layer A.

Note that the seam member 6 can be made of the same color as the materials 5A and 5B, or by making it different in color from the materials 5A and 5B, a seam can be formed at both side edges, in which case the seam member 6 has a striped shape. It has an accent effect.

Furthermore, in the molded product 1, the surface layer A is lined with a reinforcing layer B.

The reinforcing layer B is made of a thermosetting resin such as unsaturated polyester or epoxy, and a reinforcing material such as glass fiber or carbon fiber, and is hardened by curing.
A base material forming FRP is used, and the base material is
It is placed over the entire surface of the materials 5A and 5B applied to the forming frame 4. A heat insulating layer C is also added.

Therefore, the joint member 6 can be engaged with the materials 5A, 5B on both sides by the engaging portions 10, 10, and becomes a strong molded product that does not come off. Also, the joint member 6 is the mold 4
Since the tape 9 is attached to the concave grooves 7A to 7C with the adhesive surface 8 flush with the outer surface of the mold 4, when the tape 9 is peeled off, the outer surface becomes the outer surface of the bathtub 2 as shown in FIG. I can be organized. Furthermore, the seam member 6 can form a seam 3 with uniform and undisturbed color borders with the materials 5A and 5B on both sides, improving appearance.

In addition, in the method of the present invention, the joint member 6 is
It can be formed into various cross-sectional shapes, and if the engaging portion 10 is engaged with the adjacent materials 5A and 5B, it can be formed into a concave shape, a convex shape, etc.
Can be set to various shapes. Also, the molded product 1 is a joint member 6
Different FRP such as glass fiber and carbon fiber
It can also be formed by placing it at the joint between base materials.

〔Effect of the invention〕

As described above, the method for molding an FRP molded product of the present invention involves attaching a joint member to a groove provided in a mold using a tape whose adhesive surface is flush with the outer surface of the mold, and sandwiching the joint. Since the material is connected to the joint member, the outer surface of the FRP molded product is flush and flat, and the joint member makes the abutting portions of each material on both sides of the joint uniform, improving its appearance. sell. In addition, color borders of stable quality can be easily formed with good productivity and precision, which is useful for improving the design effect of molded products.

[Brief explanation of the drawing]

Fig. 1 is a perspective view illustrating a molded product obtained by the method of the present invention, Fig. 2 is a cross-sectional view showing a part thereof on an enlarged scale, Fig. 3 is a perspective view illustrating a mold, and Fig. 4 is a perspective view illustrating a molded product obtained by the method of the present invention. 5 to 8 are diagrams showing the method of the present invention, FIG. 9 is a sectional view illustrating the final step, FIG. 10 is a sectional view illustrating the conventional method, and FIG. 11 is a diagram illustrating the conventional method. FIG. 3 is a cross-sectional view illustrating a molded article obtained by the method. 3, 3A to 3C... Seam, 4... Molded product, 5A, 5
B...Material, 6...Joint member, 7A, 7B, 7C...Concave groove, 8...Adhering surface, 9...Tape.

Claims (1)

[Claims] 1. In a mold for molding an integral FRP molded product having a seam of the material, a tape having a concave groove along the seam of the FRP molded product and an adhesive surface on the outer surface is attached so that the adhesive surface is attached to the outer surface of the mold. At the same time, a joint member is attached to the adhesion surface, and each material sandwiching the joint is connected to the joint member and attached to the mold. Characteristic molding method for FRP molded products.