JPS6124185B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a composite material plate made of reinforcing fiber cloth and resin.

Conventionally, the molding of composite material plates has been carried out, for example, in
As shown in Publication No. 128763, a roll-shaped fibrous substrate is placed in a bath containing a resin liquid to be impregnated with the resin liquid, and after being pulled out, it is sandwiched between a copper foil and a cover sheet and subjected to a curing treatment. This was done by then winding it up into a roll.

According to such conventional molding methods, the resin liquid is sufficiently impregnated into the fibrous substrate, but on the other hand, the resin remains attached more than necessary and is cured without being sufficiently defoamed. Since the resin is wound up on a single roll, there are problems such as pressure-feeding using only one roll causes variations in thickness, air bubbles tend to remain, leading to quality deterioration, and the amount of resin liquid used is large, making it uneconomical.

The present invention provides a method for forming a composite material plate that can solve the above-mentioned problems, and one embodiment thereof will be described below with reference to the drawings.

In FIG. 1, 1 is a reinforced fiber cloth, 2 is a resin film, 3 is a silicone-impregnated paper which is an example of a partitioning sheet, and these 1, 2, and 3 are tension rollers 4.
is formed into a laminate 5 via a laminate 5, and then wound around a mandrel 6. At that time, the inner end 5a of the laminate 5 is connected to the mandrel 6.
and the winding is performed so that the silicone-impregnated paper 3 is on the inside, the resin film 2 is in the middle, and the reinforcing fiber cloth 1 is on the outside. The mandrel 6 and the laminate 5 thus wound are inserted into the cylindrical mold 7 as shown in FIGS. 2 and 3. This cylindrical shape 7 is supported by a plurality of wheels 8 and is rotatable around a horizontal axis 9, and both openings thereof are closed by a pair of left and right lids 10 that support and fix the mandrel 6. . Further, the outer end 5b of the laminate 5 is connected to the cylindrical shape 7 via the stopper 11.
is fixed on the inner surface of the In this inserted and fixed state, the cylindrical mold 7 is rotated in the direction opposite to the winding direction of the laminate, as shown in FIG. At the same time, the heating device 12 disposed outside the cylindrical mold 7 is started. Then, the laminate 5 is heated through the cylinder 7, and the resin film 2 is gradually melted and turned into resin. This melted resin is impregnated into the reinforcing fiber cloth 1, but at this time, a tightening force is applied to the reinforcing fiber cloth 1 with both ends 5a and 5b fixed due to centrifugal force, and the resin is also subjected to centrifugal tightening force. The force acts on it, causing it to migrate to the outside and become impregnated into the reinforcing fiber cloth 1. That is, since the reinforcing fiber cloth 1 is heated while being tightened, the resin is squeezed out and comes out due to centrifugal force, and is impregnated into the reinforcing fiber cloth 1. After that, it is cooled to harden the resin,
Then, by taking it out from the cylindrical mold 7 and rolling it out, a hard plate can be formed.

In the embodiment, heating device 1 is used as a method for heating and melting.
2 was used, but this may be a method in which the cylindrical mold 7 is disposed within the heating furnace.

Although the silicon-impregnated paper 3 is shown as a partitioning sheet in the example, it may also be a thin metal plate, and by laminating these sheets, the partitioning between the wound layers during dissolution and impregnation can be ensured. can be done.

Furthermore, although the resin film 2 is used as the resin in the embodiment, it may be of a type in which pellet resin is dropped and laminated on the silicone-impregnated paper 3 in FIG. 1, for example.

As described above, according to the present invention, the reinforcing fiber cloth can be impregnated with resin by the tightening force due to the centrifugal force of the reinforcing fiber cloth and the centrifugal movement force of the melted resin, and thereby the optimal amount of resin can be impregnated into the reinforcing fiber cloth. It is possible to easily obtain a composite material plate with a uniform thickness without bubbles.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic side view when laminated, FIG. 2 is a longitudinal sectional front view when impregnated,
FIG. 3 is a longitudinal sectional side view of the same. DESCRIPTION OF SYMBOLS 1... Reinforced fiber cloth, 2... Resin film, 3... Silicon-impregnated paper, 5... Laminated body, 5a... Inner end, 5b... Outer end, 6... Mandrel, 7... Cylindrical shape, 11... Stopper, 12
...Heating device.

Claims (1)

[Claims] 1. Wrap a laminate of reinforcing fiber cloth, resin, and partitioning sheet around a mandrel with the reinforcing fiber cloth on the outside and the resin in the middle, and fix the inner end of this laminate to the mandrel. Next, the laminate and the mandrel are inserted into a cylindrical mold, the outer end of the laminate is fixed to the cylindrical mold, and the laminate is heated while rotating the cylindrical mold in the direction opposite to the winding direction of the laminate. A method for forming a composite material plate, characterized by: