JPH0367612B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a molding method for manufacturing rain gutters and various other molded products using ultraviolet curable FRP as a molding material.

Conventional Technology Recently, a new type of molding material, UV-curable FRP, has been developed, which consists of a glass fiber-containing unsaturated polyester resin layer that can be cured by UV irradiation, and both sides of which are coated with UV-transparent films.

For example, as shown in FIG. 9, such a method of forming an ultraviolet curable FRP consists of a long ultraviolet curable FRP sheet 101 that is continuously supplied by a feed roll 100, and a plurality of forming rolls 102 that approximately It is bent into an inverted U shape, sent to an ultraviolet curing mold 104 that is fixedly supported on a support stand 103, etc., where it is sized and cured by being exposed to ultraviolet rays from an ultraviolet irradiation device (not shown).
It is conceivable to continuously manufacture molded products of irregular shapes such as rain gutters and corrugated plates, but the following problems arise in the process.

Problems to be Solved by the Invention That is, in the above-described forming method, if the UV-curable FRP is not regulated in the direction of travel when feeding it into the forming roll 102 or the UV-curable mold 104, the progress will be slow. It may shift laterally in the direction, or in severe cases, it may come off the forming roll 102, resulting in the production of defective molded products or the inability to mold. For this reason, it is necessary to grasp the ends of the UV-curable FRP to prevent it from shifting in the direction of travel, but uncured UV-curable FRP is so soft that it is extremely difficult to grasp it with clamps, etc. In addition to not being able to hold it firmly, resin may leak out from the edges, which is a major hindrance to producing molded products with a good finish.

Means for Solving the Problems The present invention was made in view of the above-mentioned circumstances, and is an ultraviolet curing type FRP that prevents the ultraviolet curing type FRP from causing lateral displacement during the molding process.
The purpose of the present invention is to provide a method for molding FRP, which comprises curing the edges, gripping the hardened ends, and then shaping and curing the uncured portions. This is the summary.

Effects and Effects According to the method for molding an ultraviolet curable FRP according to the present invention using the above-described means, when the ultraviolet curable FRP is sent to a forming process such as a forming roll,
Because only the edges are hardened in advance,
This hardened end can be easily grasped using a clamp or the like, and it is possible to completely eliminate lateral displacement of the ultraviolet curable FRP during shaping. Furthermore, since the end portions are hardened, resin will not leak out from these portions. As described above, according to the present invention, it is possible to eliminate lateral displacement of the ultraviolet curable FRP, and also to prevent the resin from flowing out from the edges, so that the finished product of the molded product can be made extremely beautiful. It is.

Embodiments Hereinafter, the present invention will be described based on illustrated embodiments.

FIG. 1 is an explanatory diagram of the molding process in which the ultraviolet curable FRP molding method according to the present invention is implemented, and shows the molding process in the case of continuously manufacturing rain gutters and the like from ultraviolet curable FRP.

Reference numeral 1 denotes a long molded sheet made of ultraviolet curable FRP, which is continuously supplied to the following steps by a feed roller 2. Supplied molded sheet 1
First, in an edge hardening step 3, only the edges are hardened. As shown in FIGS. 2 and 3, this edge curing step 3 includes a pair of ultraviolet irradiation boxes 4a and 4 that cover both ends of the molded sheet 1 in the supply path of the molded sheet 1.
b, each ultraviolet irradiation box 4a,
Ultraviolet irradiation lamps 5a and 5b are installed inside 4b to irradiate the edge of the supplied molded sheet 1 to quickly cure it. In addition, if you harden not only the edges but also the center part to a certain width and grip the edges and the center part during molding as described later, you can take out the center when manufacturing wide molded products such as corrugated sheets, or take them out. It is convenient to do.

Next, the hardened end portion 1 cured as described above is
a, 1b as shown in FIG.
The molded sheet 1 is held in this state and conveyed to the molding step 7. In the shaping process 7, the molded sheet 1 is gradually formed into a substantially inverted U-shape using a plurality of rolls 8, and then sent to the curing process 9. Curing process 9
is a step of irradiating the forming sheet 1 with ultraviolet rays from the ultraviolet irradiation lamp 10 as shown in FIGS. 1 and 4 when the forming of the forming sheet 1 is completed by the forming roll 8, The formed sheet 1 is cured by being irradiated with ultraviolet light from between each forming roll 8',
The desired rain gutter or the like is sent out as a molded product 1'. The irradiation lamp 10 oscillates or rotates as indicated by arrows X and Y in FIG. 4 to uniformly irradiate the formed sheet 1.

In addition, in the above embodiment, the ultraviolet irradiation box 4
The ends are cured by placing the materials 12 and 4b on the ends of the molded sheet 1, but as shown in FIG. The edges may be cured by arranging the cover 11 formed in step 13. Preferred examples of such ultraviolet-transparent materials include soda glass, potash glass, borosilicate glass, colored glass, etc., as well as methyl methacrylate, polycarbonate, etc. Available for use.

Further, although a clamp is generally used to grip the hardened end, the clamp is not particularly limited to this.

Furthermore, the shaping process and the curing process are not limited to those using a shaping roll as in the above embodiments. For example, as shown in FIG. Good too. In FIG. 6, a plurality of molds 15 fixedly supported by a support base 14 etc. are arranged in succession with an ultraviolet irradiation space 16 provided between each mold, and an ultraviolet irradiation lamp 1 is placed around the molds.
The curing process is carried out by deploying 7. As shown in FIG.
It consists of a male mold 18 with a shaped cross section and a female mold 19 with a substantially U-shaped cross section that covers the male mold 18, and the molded sheet 1 slides between the male mold 18 and the female mold 19. I will do it. In this case, if air is forced or oil is conveyed between the molded sheet 1 and the male mold 18 and/or the female mold 19, the molded sheet slides smoothly. In addition, as the mold 15 in FIG. 6, a pressure-pressure mold consisting of a lid 19 and a mold 20 as shown in FIG. 8 may be used. Furthermore, when performing discontinuous vacuum or pressure forming, the molded sheet 1 is cut into rectangles, the four circumferences are partially cured in an ultraviolet irradiation box, and the cured ends are held with clamps to remove the uncured parts. What is necessary is just to irradiate ultraviolet rays and harden it while shaping the central part in a vacuum or compressed air. In short, in the present invention, any method of shaping and curing may be used.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing the molding process of the ultraviolet curable FRP molding method according to the present invention, FIG. 2 is a schematic plan view illustrating the edge curing process, and FIG. 3 is A of FIG. -A end view, FIG. 4 is a B-B end view of FIG. 1, FIG. 5 is a cross-sectional explanatory diagram of an end hardening process according to another example, and FIG. 6 is a schematic side view showing a molding process according to another example. Figure 7 is C of Figure 6.
-C end view, FIG. 8 is an explanatory end view showing another example of a mold, and FIG. 9 is a schematic side view showing a conventional molding process. 1... Molded sheet, 1a, 1b... Hardened end portion, 3...
End hardening process, 7...forming process, 9...hardening process.

Claims (1)

[Claims] 1 After curing the end and gripping this hardened end,
A method for molding ultraviolet curable FRP, which is characterized by shaping and curing the uncured portion.