JPS623207Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a new molding die device used to simultaneously mold multiple FRP rod-shaped bodies, and uses a bundle of dozens of glass rovings. After passing multiple rods through an impregnation bath to impregnate them with thermosetting resin, they are passed through an ultraviolet curing furnace to semi-cure, and then passed through several sets of molds installed in a far infrared curing furnace to form FRP rods in the desired shape. It is an object of the present invention to provide a molding die device for hardening and molding a body.

The molding device for FRP rod-shaped bodies of the present invention consists of a plurality of sets of molding molds, which are formed by vertically combining half-split molds with multiple rows of grooves of the desired shape formed on the opposing surfaces of plates, in a far-infrared curing furnace. In the forming mold apparatus, with the grooves of one half mold facing downward and the grooves of the other half mold facing upward, both half molds are moved in the drawing direction so as not to overlap each other. The mold is fixed at a required interval, and far infrared heaters are disposed above and below the mold.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.A molding die A has a set of two upper and lower half-split molds 1 and 2, and one half-split mold 1 is attached to the bottom surface of the plate 1a. Semicircular grooves 1b are arranged in eight rows in parallel, and the other half mold 2 has a structure in which semicircular grooves 2b are arranged in eight rows in parallel on the upper surface of the plate 2a, similar to the above half mold 1. . Then, with the semicircular groove 1b of one half mold 1 facing downward and the semicircular groove 2b of the other half mold 2 facing upward, the FRP rod C is axially (pulled out) It is fixed at the required intervals.
Note that 1c and 2c are bolt holes provided on both sides of the half molds 1 and 2.

In this embodiment, a plurality of molds A, A, etc. described above are fixed approximately 40 cm apart from each other approximately in the middle of the far-infrared curing furnace 4 installed behind the ultraviolet curing furnace 3. Along with the upper and lower half molds 1 and 2
Far infrared curing furnace 4 with bolts 5 separated by 10 cm
, and far-infrared heaters 7 and 8 are installed inside the upper cover 4b of the far-infrared curing furnace 4 and inside the curing furnace main body 4a, respectively, and the upper cover 4b is placed over the curing furnace main body 4a. In this state, heaters 7 and 8 are arranged above and below the molds A, A, . . . . Note that 4b' is a pivot portion of the upper cover 4b.

In addition, FIG. 3 shows a half-split mold 10 which is another embodiment of the present invention, and in this case, the plate 1
It has a structure in which eight rows of half-square grooves 10b are provided at required intervals on the upper surface of 0a, and when forming a square rod-shaped body, several sets are installed in the far-infrared curing furnace 4 as described above. use.

Although the embodiments of the present invention have been described above, the present invention is not limited only to the above embodiments, and the shape of the groove in the half-split mold can be changed to polygons such as ellipses, triangles, pentagons, hexagons, etc. as appropriate. Instead, it is also possible to mold polygonal FRP rods or oval FRP rods, and the number of grooves can also be changed to 2, 3, 4, 5, etc.
It is also possible to change the number of molded pieces as appropriate by arranging a large number of them in parallel, such as 6 pieces...10 pieces, 12 pieces, etc.

The mold A of the present invention is constructed as described above, and for example, a bundle of 25 to 35 glass rovings is placed in an impregnating tank (not shown) containing 8 polyester resins. ) after immersion in
It passes through an ultraviolet curing furnace 3 in which several ultraviolet lamps are set, and here the FRP member, which is a glass roving impregnated with polyester resin, is semi-cured and transported into a far-infrared curing furnace 4.

When the semi-hardened FRP member is passed through the groove 1b of one of the half molds 1 of the first molding die A, eight grooves are formed by the semicircular grooves 1b, 1b... Only the upper half of each FRP member is molded into a circular shape, and then passed through the other half mold 2 spaced approximately 10 mm apart, where the lower half of each of the eight FRP members is molded into a circular shape, covering the entire circumference. A circular rod-shaped body C is manufactured. That is, by aligning another half mold 2 directly below the half mold 1 and passing an FRP member mainly made of glass roving into the grooves of these two half molds, a circular or polygonal shape is formed. The fibers of the glass roving become entangled at the entrance of the groove, and gradually become bulky.
Eventually, the glass roving gets stuck in the groove of the molding die, causing the roving to break or making pultrusion impossible. Therefore, the required spacing in the drawing direction is made so that the upper and lower half molds do not overlap. After setting and molding half of the FRP member with one half mold 1, the remaining half is molded into the desired shape with the other half mold 2, so that the fibers of the glass roving fit into the grooves of the mold. It is shaped so that it can pass smoothly without getting stuck inside.

Then, 5 to 8 sets of molds A, A, etc. are attached to the long far-infrared curing furnace 4 at a distance of 30 to 50 cm, and a plurality of FRP members are inserted into the molds A, A.
...However, it is still molded into a rod-shaped body of a desired shape.

On the other hand, several ultraviolet lamps (not shown) are installed in the ultraviolet curing furnace 3, and the FRP member is passed through the central axis of the ultraviolet lamp, so that the FRP member on the side closer to the ultraviolet lamp (not shown) The hardening process progresses, while the hardening of FRP members located further away from the ultraviolet lamp (center position) is delayed. Therefore, when the FRP member being pulled out at a speed of 4 to 10 m/min leaves the exit 3a of the ultraviolet curing furnace 3,
Hardening progresses on the outside and slows down on the inside. When the FRP member is fed into the first molding die A in this state, the outermost FRP member is molded and hardened into a desired shape. However, since the FRP member placed inside and pulled out is delayed in hardening, the second, third, etc. molding molds A, A, etc.
It is cured and molded into a desired shape. In this way, if the number of FRP rods C made by pultrusion is increased, more molds A can be installed, and the molds A, A, etc. can be sequentially hardened by the far infrared heaters 7 and 8. By heating it while passing through it, it is possible to completely form the FRP rod into the desired shape.

As mentioned above, the molding mold of the present invention has an upper and lower split mold structure, and the half molds are installed at different positions without stacking the upper and lower half molds. Therefore, an FRP member that is pultruded at high speed can be formed into a rod-shaped body of a desired shape using this mold. This molding mold has a very simple structure that can be cut in half vertically, and it can completely prevent clogging in the glass fiber mold, which was a drawback of the conventional mold, so it can be used for continuous drawing of FRP rods. It has become indispensable for molding.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a molding die according to one embodiment of the present invention, Fig. 2 is a perspective view of a molding die device according to one embodiment of the present invention, and Fig. 3 is a perspective view of a half mold according to another embodiment of the present invention. A: molding die, 1, 2: half mold, 1a, 2
a: plate; 1b, 2b: groove; 3: ultraviolet curing furnace; 4: far-infrared curing furnace; 7, 8: far-infrared heater; C: FRP rod-shaped body.

Claims (1)

[Scope of utility model registration request] In a molding mold device in which a plurality of molding molds each of which is formed by vertically combining half molds each having a plurality of rows of grooves of a desired shape formed on the opposing surfaces of a plate are installed in a far infrared curing furnace, one of the above half molds With the grooves of the half mold facing downward and the grooves of the other half mold facing upward, the two half molds are fixed at a required interval in the drawing direction so that they do not overlap each other, and the molds are placed above and below the mold. A mold device for forming FRP rods equipped with a far-infrared heater.