JPS5933117A - Manufacture of cylindrical resin molded item - Google Patents

Abstract

PURPOSE:To obtain readily a fiber reinforced resin pipe with a constricted section, by forming reinforcing fibers into a stretchable cylindrical reinforcing member, mounting it on an inner mold, stretching it longitudinally so as to bring it in firm contact with the outer circumferential surface of the inner mold, putting it on an outer mold and injecting a resin between the molds. CONSTITUTION:Fibers such as glass fibers, polyfluorocarbon fibers, etc. are knitted in the rub knitting manner into the cylindrical reinforcing member 1. After the member 1 is mounted on the inner mold 5 having a small diameter section 2, a large diameter section 3 and a tapered section 4, the member 1 is stretched longitudinally so that the member 1 is brought in firm contact with the outer circumference of the inner mold 5. Then they are inserted into the outer mold 6, and a resin is injected in the cavity 7 defined between the molds. After the hardening of the resin, the outer and inner molds 6, 4 are removed to obtain the fiber reinforced resin item 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for producing a commercially-shaped molded product using fibers such as glass fiber HR+T and polyfluorocarbon fiber as reinforcing paulownia.

Conventional technology? Conventionally, when manufacturing cylindrical resin molded products suitable for fuse tubes, etc., a non-woven reinforcing part made of Galanu fiber was soaked in a synthetic resin such as epoxy resin and then wrapped around a mold to form the product. Methods have been proposed in which a filament made of glass fiber is immersed in a synthetic resin, wound around a mold several times, and then molded and solidified.

However, with the former method, there is no problem if the molded product has the same diameter in the longitudinal direction of the pipe-shaped strand, but when manufacturing a molded product with a small diameter part and a large diameter part in the longitudinal direction, d
Is it difficult to use the latter method because it involves wrapping the filletant around the mold several times? The time between windings is longer and the overall manufacturing time is also longer.
,""II"'1 The purpose of this invention is to solve the above-mentioned drawbacks1'L"c11111"" Also when manufacturing molded metal parts in the shape of a vibrator, it is also possible to solve the problems described above. Do you manufacture molded products with smaller diameter parts? It is an object of the present invention to provide a method for manufacturing a molded product of one shape and one finger, which can be easily carried out even in various cases.

Examples: Hereinafter, this invention will be referred to as Kodiaso. A commercial resin molded product with a large gate. An embodiment of Suzo Suzo will be described with reference to FIGS. ? Vinegar First, as the reinforcement part FA1, heat-resistant galanu fibers treated with silane are knitted with rubber. What does it mean to have sex? Both are knitted into a cylindrical shape with a predetermined diameter qf,i. -f: . Product dimension J:! of this cylindrical reinforcing member 1 in the length direction. 11 Cut into long pieces.

Next, as shown in FIG. 1, the small diameter part 2 and the large diameter part 3 are inserted through the tapered part 4 into the inner mold 5 formed on both the upper and lower parts, respectively, so as to cover the outer periphery of the inner mold 5. ．． :． Insert the reinforcing member 1, and then insert the same reinforcing member 1i into each other.
J polymerization. Cover several values so that you can use it. In addition, in the small example, the reinforcing member 1 is 3:z in the inner mold 5.
1? Let i: δ be the number of insertions. Then, the reinforcing material 1 of A is stretched in the longitudinal direction (downward in the figure) of the inner mold 5, and the outer periphery of each part of the inner mold 5, i.e., the small diameter portion 2, is stretched. To the Togawa River in the part F and large diameter part A.

(See Figure 2).

After this, the inner diameter is 5. On the other hand, “Nige”? Minute H j
The flexible outer mold 6 is rearranged to cover the outer periphery of the outer mold 6, and the outer mold 6 and the outer mold 6 are arranged.
．．・・・：・・l:ll. ,ll'i': In the middle of I・1-
Ikkyu's gearbity 7 having a sheath with a fixed length of m'''' is formed in one piece....In addition, 8 in FIG. Then, fit the lower part of the large diameter capital 3 of the inner mold 5 and attach the outer mold 6.
The inner mold 5 is attached by a bolt l- (not shown) inserted from the lower surface of the mold. Reference numeral 9 denotes a centering recess formed inwardly in the upper part of the outer mold 6, into which the upper part of the small diameter part 2 having the inner diameter 5 is fitted.

In this way, after assembling both molds 5 and 6, the 7JI
Heat with a heat oven until the specified temperature is reached.

Then, a fluid synthetic resin 10 such as a tongue boxy resin that has been sufficiently defoamed using a vacuum pump (not shown) is transferred to an I.C. liI
It is injected into the gearvite 7 through the injection pipe 11'ff connected to the lower part of the outer mold 6, filled so as to fill the reinforcing part 0l, and then solidified in the mold 6.

After solidification, the molded product 12 is molded from both molds 5 and 6.
Mold (Figure 4 $l ID).

As described above, in this embodiment 2, the molded product 12 having a small diameter portion and a large diameter portion can be easily manufactured.

Note that the present invention is not limited to the above-mentioned embodiments, but can also be implemented as follows.

(a) Bolite 1 instead of galanu fiber as reinforcing member 1
Use other fibers such as lafluorocarbon fibers.

(b) The fibers constituting the reinforcing member 1 are knitted with stockinette knitting or the like instead of rubber knitting to give them elasticity.

(C) Although not shown, the reinforcing member 1 is inserted into the cylindrical inner mold, and then stretched in the longitudinal direction so as to be brought into close contact with the outer periphery of the inner mold 5. ν To solidify into a pipe-shaped molded product with the same diameter in the longitudinal direction.

(d) Epogi. Use other synthetic resins instead of synthetic resin.

As described in detail in "Effects" (2), this invention has elasticity by knitting fibers such as glass fibers and polyfluorocarbon fibers, and the reinforcing part A, which is formed in a cylindrical shape, is attached to the outer periphery of the inner mold. The outer mold and the inner mold are placed so as to cover the inner mold, and are then stretched along the longitudinal direction of the inner mold to tightly contact the outer periphery of the inner mold, and are then arranged to cover the outside of the inner mold. i. ri is filled with synthetic resin so as to fill the reinforcing part (7), and by assimilation molding, it is also possible to make a pipe-shaped molded product by separating the small diameter part and the large diameter part in the longitudinal direction. This is an excellent invention because it can be easily manufactured even when producing a molded product that can be swollen.

[Brief explanation of drawings]

FIGS. 1 to 4 illustrate embodiments of the present invention; The figure is a cross-sectional view of the reinforcing member inserted into the outer periphery of the inner mold, the second section is a cross-sectional view of the reinforcing member stretched from Fig. 1, and the shoulder is closed tightly, and Fig. 3 is a cross-sectional view of the reinforcing member inserted into the outer periphery of the inner mold. The fourth figure is a cross-sectional view of the molded product. Reinforcement part 1, small diameter part 2, large diameter part 3, inner mold 5. External height 6, Synthetic resin 100 Patent applicant: Takamatsu Electric rW Co., Ltd. Patent applicant: Kanno Kogyo Co., Ltd.

Claims (1)

[Claims] 1 Galanu fiber, polyfluorocarbohydrate>l1l. A reinforcing member formed into a cylindrical shape by knitting fibers such as linden fibers is placed so as to cover the outer periphery of the inner mold, and then stretched along the longitudinal direction of the inner mold. By doing this, it is brought into close contact with the outer periphery of the inner mold. Thereafter, a synthetic 4'ffj resin is filled so as to fill the mJ reinforcing member between the outer mold and the inner mold, which are arranged so as to cover the outside of the inner mold, and then solidified and molded. A method for manufacturing resin molded products. 2. The cylindrical mold according to claim 1, wherein the outer periphery of the inner mold is formed with a small diameter part and a large diameter part via a tapered part in the longitudinal direction. A method for manufacturing resin molded products.