JPS5813332B2 - Lamination molding method for reinforced plastic products - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for molding reinforced plastic products.

In reinforced plastic (hereinafter referred to as ffiF RP) products, the main body 1 of the molded product A is made of a different material, for example, as shown in FIG. 1, or a different color panel 2, etc.
It is generally known to improve design quality by integrating coloring materials.

Conventionally, in the molding of such FRP products, resin branches 4 for forming the concave portions of the molded product are adhered to the surface of the mold 3 as shown in FIG. Gel coat 5 as shown
By laminating and curing FRPe on top of the sprayed FRPe, a molded article A is obtained. After demolding this, the resin branch 4 for molding the concave portion is removed from the molded article A as shown in Fig. 2C. A method has been implemented in which a different color panel 2 or the like is fitted into the recess 7 formed in the molded article A and fixed with an adhesive or the like.

However, according to such a molding method, when a different material or the like is fitted into the recess 7, the molded product body 1 and the different color panel 2 tend to be easily separated due to the difference in thermal expansion coefficient, etc. When the panel 2 is made of a thin plate, the peeling phenomenon of the panel 2 is remarkable, and especially when the panel 2 is made of a thin plate. When the panel 2 is fitted into a recess 7 previously provided in a portion to be waterproofed, there is a problem in that water leakage may occur in the waterproof portion.

Therefore, as a result of studies in view of the above-mentioned conventional difficulties, the present invention embeds such different members with the molded product by integral molding, thereby making it possible to mold simply and easily in one process, and eliminating the risk of peeling. This method has been developed to completely prevent water leakage, especially in waterproof parts.

The present invention will now be described in detail based on the specific example shown in the drawings. In FIG. 3A, 3C, and 3C, the surface of the mold 11 is provided with concave portions for molding the molded product in order as shown in FIG. 3A. The mold 12 and the embedding member 13 corresponding to the above-mentioned different color panel 2 are releasably stacked together using, for example, a double-sided adhesive tape (not shown) and are adhered with putty or the like.

The mold 12 for forming the concave portion is made of a material suitable for a mold, such as a suitable thermosetting resin plate, a wooden board, or a strong aluminum plate.

When the embedding member 13 is overlapped with the recess forming mold 12 as shown, the recess is formed so that its peripheral portion 13' extends outward from the peripheral edge 12' of the recess forming mold 12. It is formed to be suitably larger than the mold 12, and is made of an appropriate synthetic resin plate, such as a panel of the same color and different color as the molded product, or a panel of a different color or color.

Then, the embedding member 13 is inserted into the recess forming mold 1 so that its peripheral portion 13' has an even extending width as described above.
2, the concave molding mold 12 is bonded to the molding mold 11, and fixed together with the embedding member 13 on the surface 11' side of the molding mold 11.

Next, gel coat 1 is applied to the surface 11' of the mold 110, the embedding member 13, and the peripheral edge 12' of the recess mold 12.
Spray No. 4 as shown in the opening in Figure 3.

In addition, the gel coat 14 is formed by a mold 12 for molding the concave portion and a member 13 for embedding.
It also plays the role of firmly fixing the mold to the mold 11.

After spraying the gel coat 14 in this way, the FRP 15 is applied along the surface 11' of the mold 11 as shown by the two-dot broken line in the opening of FIG.
After being laminated in a covered state and hardened by a conventional method, the embedding member 13 and the mold 12 for molding the recess are removed from the mold together with the molded product 16.

Thereafter, by removing the mold 12 for molding the concave portion from the article 16 as shown in FIG. 3C, the article 16 and the embedding member 13 are integrally molded.

In this way, the mold 12 for forming the concave portion is removed.
In this case, as described above, the embedding member 13 is inserted into the recess molding mold 1.
Since it is molded appropriately larger than 2, the embedding member 13
The riverside portion 13' is embedded in the molded product 16 and will not be removed from the molded product 16, so that the embedding member 13 is integrated with the molded product 16 in a watertight and airtight manner. Ru.

Note that by tapering the peripheral edge 12' of the mold 12 for forming the recessed portion in advance, the above-mentioned extraction after demolding can be performed more conveniently.

Next, FIGS. 4 and 5 showing other embodiments of the present invention will be described.

First, FIG. 4 shows a panel with a window. In such a case, a glass plate is used as the embedding member 13, and a concave molding mold 12 and a glass plate are placed on the inner surface 11' of the molding mold 11. Embedding member 13, hole forming mold 12a, and support frame 12b
FRPk is sequentially polymerized and bonded, and then FRPk is laminated in the same manner as in the above-mentioned embodiments, and after curing and demolding, the recess molding mold 12, the hole molding mold 12a, and the support frame 12b-t are formed. It is something to be extracted.

Further, the support frame 12b is made of a wooden frame and may be removed as described above, but it may also be integrated with the molded product 16 together with the embedding member 13 without being removed. In this way, it can be used as a support cylinder for the embedding member 13 as a window frame.

Further, the support frame 12b is formed into a cylindrical shape, a box shape, or the like.

Figure 5 shows the alignment of the inspection port.
The concave molding mold 12 is used together with the lid of the inspection port 17, and the embedding member 13 is made of strong aluminum or the like.
After laminating P, removing the mold after curing, and removing the mold 12 for forming the concave portion, cut out the necessary areas of the embedding member 13 and the molded product 16 by a desired area to open an inspection hole 17, and then When the rear recess molding die 12 is bonded to the embedding member 13 with screws 18, the recess molding mold 12 can be used as a cover for the inspection port 17.

Fig. 6 shows boxes for lighting or ventilation, etc. If the box is large, use the box as the embedding member 13, laminate FRPk, harden it, remove the mold, and mold the recess. The mold 12 is removed and the molded product 16 and the box are integrally molded.

At this time, an outward flange 13' is provided at the opening edge of the embedding member 13 serving as a box, and FRP is laminated so as to embed the outward flange 13'.
It is better to integrate it with

As explained above, according to the molding method of the present invention, after fixing the concave molding mold 12 and the embedding member 13 in a sequentially overlapping state on the surface 11' of the molding mold 110, FRPk is laminated, and the mold is removed. Afterwards, the mold 12 for molding the concave portion is pulled out and the molded product 1 is removed.
6 and the embedding member 13 are integrally molded,
By using different materials or panels of different colors for the embedding member 13, molding of FRP products with different materials or different colored parts at desired locations requires the process and labor of gluing colored panels etc. as in the conventional example. It can be easily and easily mass-produced in a single process.

In addition, since the embedding member 13 is formed considerably larger than the recess molding mold 12, the enlarged peripheral portion 13' is embedded in the FRP lamination, thereby making it easier to mold the product. 16 in a watertight and airtight manner, and therefore not only prevents water leakage even in parts of the product that require waterproofing, but also molds an FRP product that never separates from the molded product 16. be able to.

In particular, the present invention not only focuses on preparing the recess molding mold 12 as a completely different material from the molding mold 11, but also
Since the separate material is releasably adhered to the molding die 11, the concave molding die 12 of the required size can be adhered to any desired position, and the embedding member 13 of any size can be attached. , it can be selectively buried in the required position, and as a result, it is possible to meet any request regarding the width dimension, height position, etc., such as in the belt line of a bathtub. 1 mold 11
All of the above-mentioned demands can be met by simply preparing the mold 11, and as a result, it is possible to change the belt line etc. without preparing many types of expensive molding molds 11.
The manufacturing cost can be significantly reduced.

Next, in the present invention, the embedding member 1 is placed on the surface of the recess forming mold 120.
3 is bonded with a non-drying adhesive that is deformable and does not harden, such as double-sided adhesive tape, so after removing the molded product such as a bathtub from the mold 11,
When removing the concave molding die 12 from the molded product, by applying an external force such as tapping or pushing the mold 12 lightly, the intervening double-sided adhesive tape etc. is slightly deformed and the concave molding die 12 is removed from the molded product. The mold 12 is allowed to move, and as a result, even if there is a bond between the upper and lower edges of the concave molding mold 12 and the gel coat 14, this becomes separated, and the mold 12 can be easily removed. You will get it.

Furthermore, in the present invention, the above-mentioned recess molding mold 12 is used as the molding mold 1.
1, it is possible to remove the same mold 12, the embedding member 13, and the molded product 16 as a whole, and the gel coat treatment can also be applied to the mold 11, the concave mold 12, and the embedding mold 16. From the upper and lower edges of the member 13
Since the surface of the holder 12 and the member 13 are positioned with respect to the mold 11, the embedding member 13 may be inadvertently displaced during lamination of the FRP 15, resulting in uneven inclination. The creation of a belt line, etc., could also lead to extinction.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an FRP product, Fig. 2 A, A, C, and 2 are longitudinal cross-sectional explanatory views of each process showing the conventional molding method for FRP products in the order of molding, and Fig. 3 A, C, and C are the invention of the present invention. Vertical explanatory diagram of each process showing the molding method for FRP products in the order of molding, No. 4
5 and 6 are vertical cross-sectional views showing other embodiments of the same molding method, respectively. 11... Molding mold, 11'... Surface of the molding mold, 12... Concave molding mold, 12b...
...Support frame, 13...Embedding member, 14.
... Gel coat, 16 ... Molded product.

Claims (1)

[Scope of Claims] 1. A mold for forming a concave portion of a to-be-molded product is adhered and stacked on the surface of the mold in a rising state so as to be removable, and the surface of the mold for forming a concave portion has a mold for forming the concave portion. An embedding element substantially larger than the mold is releasably adhered and stacked with a deformable non-drying adhesive such as double-sided adhesive tape, and if necessary, a larger embedding element is placed over the embedding element, which is substantially larger than the mold. A substantially small member such as a support frame is fixed, and each exposed surface of the mold for molding, mold for recess molding, and embedding member in the same state is coated with gel coat, and then uncured reinforcement is applied thereon. After laminating the plastic and curing the gel coat and the uncured reinforced plastic, the molded product is placed along the raised surface of the mold together with the recess mold and the embedding member. A method for laminated molding of reinforced plastic products, characterized in that the mold is demolded, and then a mold for forming a concave portion is extracted from the product to be molded, and the embedding member is left integrally with the product to be molded. 2. A method for laminated molding of reinforced plastic products according to claim 1, in which the embedding member is a plate-shaped body, a frame-shaped body, or a box-shaped body.