JPS60206619A - Mold for compression molding of deeply drawn item - Google Patents

Abstract

PURPOSE:To prevent wrinkles from occurring when molding is carried out, by placing a mat material in a bottom force, spreading outward a plurality of split cores in the bottom force using a tapered block so as to secure the mat material, and setting the mat. CONSTITUTION:An unset thermosetting resin (FRP) mat material 9 is placed in the recess of a bottom force 10, a plurality of split cores 4, 5, 6, 7, 8 are applied to the mat material 9, a tapered block 2 and an upper plate 1 are lowered to spread the cores outward so that the mat material 9 may be pressed against sides of the bottom force 10, and the mat material is set. The mat material would be prevented from having wrinkles due to entanglement, and a deeply drawn item can be produced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold for a deep-drawn product made of a thermosetting composite resin, such as glass fiber reinforced plastics (FRP).

Conventionally, a method for molding a mantle material made of thermosetting composite resin material (FRP) has been to raise the temperature of an upper mold and a lower mold, and then hold the material in the mold and pressurize it. For this reason, products with deep product shapes have problems in releasing from the mold when taking the product out, making it difficult to mold, and furthermore, when lowering the upper mold to apply pressure.

There are problems such as the material being rolled up, often causing wrinkles, and the product cannot maintain a specified material strength.

In view of the above-mentioned points, the present invention provides a compression molding mold that can mold even deep product shapes without generating wrinkles due to material entrainment, and that can be easily released from the mold.

Two embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

The upper plate 1 and the block 2 having a tapered part are fixed. Cores 8, 4, 5, 6, 7 and 8 are divided cores, as shown in FIG.

The whole forms a core. The inner surface of each core of the core is one side of the block 2, 2a, 2b, 2c, 2d.
, an abutting surface 3a abutting with 2e and 2f, respectively;
4a, 5a.

6a, 7a and 8a. An upper mold is composed of an upper plate 1, a block 2, and six cores 3, 4, 5, 6, 7, and 8 forming a core.

A mat material 9 made of thermosetting composite resin (FRP), which is a molding material, is placed in the cavity of the lower mold IO.

During molding and pressurization, the block 2 enters a space surrounded by six cores forming the core and is pushed downward (in the direction of the arrow in FIG. 1). The pressure of the molding machine is transmitted by the tapered surface of the block 2 to the six cores forming the core. The six cores are aligned in the lateral direction (arrow B in Figure 1,
C, D direction, etc.), and the mat material 9 is moved not only downward.

It also has the effect of receiving pressure in the lateral direction.

The operation will be explained with reference to FIG.

Thermosetting composite resin (li' IL P) which is a molding material
) is placed in the cavity of the lower mold 10. At this stage, the mat material 9 has irregularities. Next, six cores (only cores 5 and 6 are shown in FIG. 8) forming a core are placed on the mat material 9.

Next, as shown in FIG. 8(A), the upper plate 1 and block 2 are lowered. Tapered surface 2G of block 2.

2d, the cores 5 and 6 are pushed outward and pressurized so as to press the mat material 9 against the side surface of the lower mold 10. At the bottom dead center of the molding machine, the state is as shown in FIG. 3(B). At this time, the positions of the cores 5 and 6 are determined by the bottom surface of the upper plate 1 and the tapered surface of the block 2, and do not move. The mat material 9 is cured by heating in this state.

When releasing the mold, as shown in FIG. 8(C), after raising the upper plate 1 and block 2, it is possible to move the cores 5 and 6 inward and peel them off. It became.

As mentioned above, according to the present invention, the convex upper die is divided into a block having a tapered part and a core having an abutting surface that abuts against the tapered surface of the block, and By transmitting molding pressure to the core in the lateral direction, even products with deep shapes can be molded without wrinkles caused by material entrainment, and release from the mold is easy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a mold according to the present invention, FIG. 2 is a perspective view of a core forming a core, and FIG. 8 is a sectional view illustrating the operation. 1...-Top plate, 2...Block j
85 %j 5j L7.8...Core, 9.
・・・・・・Mat material, 10・・・・・・Bottom mold. Figure 1 Figure 2 (A))

Claims (1)

[Claims] A compression molding mold including an upper mold having a convex shape. The block is divided into a block that has a tapered part and a core that contacts the molding material.The core is divided into multiple cores, and the core has an abutment that abuts the tapered surface of the block on the inner surface that does not contact the molding material. Compression molding of a deep-drawn product characterized by having a structure in which the tapered surface of the block and the abutting surface of the core abut against each other during molding pressurization, and pressure is transmitted from the block to the core through the tapered surface. Mold for use.