JPS60242043A - Fiber-reinforced plastic molding device - Google Patents

Abstract

PURPOSE:To enable a fiber-reinforced plastic molded article having a curved surface part and flange parts to be intermittently laminate molded by a smaller number of component parts, by using variable curvature members corresponding to the curvature which is varied on each lamination. CONSTITUTION:When molding an article having the curved surface part 2 and the flange parts 3 continuous with each other by an intermittent laminate molding method wherein the lamination of a prepreg comprising a fibrous sheet impregnated with a hardenable resin and the hardening of the resin are repeated multiple times, a mandrel 5 for molding the curved surface part 2 is used together with a fixing means 6, a pressing member 7, auxiliary members 10 for pressing and a holding member 11 which are used for molding the flange parts 3. The members 10 are obtained by concentrically separating a sectorial member, which is fitted to the inner circumference side of the sectorial pressing member 7, into pieces with a width corresponding to the thickness of the prepreg, and the number of the members 10 used is reduced as the lamination proceeds.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for molding a fiber-reinforced plastic molded article having a curved surface portion and a flange portion by intermittent lamination molding.

[Prior art]

FIG. 1 is a partially cutaway sectional view of a cylindrical FRP molded product, and the molded product (1) has a curved surface portion (2) and a flange portion (3). If such a molded product (1) is manufactured by integral molding, air bubbles may remain between the layers, excessive resin tends to be present at the corner portions, and defects may occur between the layers at the corner portions, so lamination and curing are repeated. Intermittent lamination molding is performed in which molding is performed in multiple steps.

In FIGS. 2 and 3, (A) is a sectional view showing a conventional molding device, and (B) is a front view of each presser member. In the figures, (4) is a laminated layer of fiber reinforced plastic molding material. (5) is a mandrel placed inside the curved surface (4a) of this laminate (4), (6) is this mandrel (
5) Fixtures fixed to the ends of.

(7a) and (7b) are for pressing down the laminate (4), which are provided at opposing positions with the flange (4b) of the laminate (4) sandwiched between the fixture (6) and the fixture (6). The holding member (8) is a mounting member for attaching the holding members (7a) and (7b) to the fixture (6), and (9) is a spring for pressing the holding members (7a) and (7b). be.

In the above configuration, as shown in FIG. 2(A), the laminate (4) is fixed to the mandrel (5) and the fixture (6), and the curved part (4a) of the laminate (4) is fixed. The holding member (7a) shown in FIG. 2(B) having a curvature is attached to an opposing position by a mounting member (8), and is pressed by a spring (9).
Heat and cure. After that, the laminates (4) are sequentially laminated, pressed with a pressing member with a corresponding curvature, and cured repeatedly.
Finally, after laminating the layers as shown in Figure 3 (A),
) is used to press and harden the molded product (1).

Conventional molding equipment was configured as described above, so if the pressing member is not prepared according to the curvature that changes with each layer, the curvature will not match and there will be areas where pressure cannot be applied locally. This method requires a large number of corresponding holding members, which is disadvantageous in that it is uneconomical and has poor workability.

[Summary of the invention]

This invention was made with the aim of improving such drawbacks, and is an apparatus for molding a fiber-reinforced plastic molded product having a curved surface portion and a flange portion by intermittent lamination molding.
A mandrel placed inside the curved surface of the laminated portion, a fixture fixed to the end of the mandrel, and a presser provided at a position facing the flange of the laminated portion between the fixture and the fixture. a member, a variable curvature member inserted into the end of the holding member and the outside of the flange portion of the laminated portion, a holding member that holds the variable curvature member, and a suppressing member that presses the holding member toward the fixture. The present invention proposes a fiber-reinforced plastic molding device that can easily mold the plastic by changing the curvature for each layer.

(A) of FIGS. 4 to 6 is a sectional view of a fiber-reinforced plastic molding apparatus according to an embodiment of the present invention, and (B) is a front view of the respective presser members and variable curvature members,
The same reference numerals as in FIGS. 1 to 3 indicate the same or corresponding parts. The holding member (7) is made of a single member having a constant curvature, and a variable curvature member (10) is inserted between the end thereof and the outside of the curved surface portion (4a) of the laminated portion (4). There is. The variable curvature member (10) is a member (10a), (10b) having multiple curvature surfaces made of rubber, plastic, metal, etc.
, (10c) are stacked on top of each other, and is attached to the presser member (7) by the holding member (11). The other configurations are the same as those in FIGS. 2 and 3.

In the above configuration, as shown in FIG. 4(A), the laminate (4) made of the initial molding material is laminated and
7) to hold the flange part (4b), and between the end of the holding member (7) and the curved surface part (4a), the member (10a), (1
0b).

The variable curvature member (10) consisting of (10c) is inserted, and the retaining member (11) prevents it from falling off and deforming.
9) to perform heat curing. Next, Figure 5 (A
) A laminate (4) in which primary molding materials are laminated as shown in
A variable curvature member (10) consisting of members (10a), (], Ob) is inserted and pressed with a presser member (7) to heat and harden. After that, the molding materials were sequentially laminated, and the member (10
b).

(10a) is successively removed to change the curvature of the variable curvature member (10), and finally, as shown in FIG. 6(A), the variable curvature member (10) is removed and suppressed only by the presser member (7) Curing is performed to produce a molded article (1). Removal of the members (IOc), (10b), and (IOa) at each stage is possible by shifting the holding member (11) in the direction of the holding member (7), fixing it with a screw, and removing the lower member. .

In this way, by replacing the curvature variable member (10) with a variable curvature member (10) that matches the curvature, molding can be performed without having to replace the presser member (7) each time in response to the curvature that changes due to lamination.

Although the variable curvature member (lO) is shown as a layered sheet of rubber, plastic, or metal, it may have another structure.

〔Effect of the invention〕

As described above, according to the present invention, since a variable curvature member is provided that corresponds to the curvature that changes with each layer due to intermittent lamination molding, defects at corners such as bubbles and excess resin that occur in integral molding do not occur, and Not only can a high-quality molded product be obtained, but the number of parts can be reduced, making it economical and improving workability.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a circular cylinder-formed part made of FRP, FIGS. 2 and 3 (A) are cross-sectional views of a conventional fiber-reinforced plastic molding apparatus, and (B) is a front view of each pressing member and variable curvature member. In the figure, (1) is a molded product, (4) is a laminate, and (5) is a laminate.
is a mandrel, (6) is a fixture, (7) is a presser member, (
8) is a mounting member, (9) is a spring, (10) is a variable curvature member, (10a), (Job), (10c) are members, and (11) is a holding member. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1, Figure 2 (A) (B) Figure 3, Figure 4, Figure 5 (A) Kazuhaku 6 (A) Tadashi (B) Figure (B)

Claims (3)

[Claims] (1) An apparatus for molding a fiber-reinforced plastic molded product having a curved surface part and a flange part by intermittent lamination molding, which includes a mandrel placed inside the curved part of the laminated part, and a fixture fixed to the end of this mandrel. , a presser member provided at a position facing the fixing member across the flange portion of the laminated portion, and a variable curvature member inserted at the end of the presser member and outside the flange portion of the laminated portion; A fiber-reinforced plastic molding apparatus comprising: a holding member that holds the variable curvature member; and a suppressing member that presses the pressing member toward the fixture. (2) The fiber-reinforced plastic molding apparatus according to claim 1, wherein the variable curvature member is a stack of members having a plurality of different curvature surfaces. (3) The fiber-reinforced plastic molding apparatus according to claim 1 or 2, wherein the variable curvature member is made of rubber, plastic, or metal.