JPS5862015A - Molding method for fiber reinforced resin products - Google Patents

Abstract

PURPOSE:To produce a homogeneous fiber-reinforced resin item having a high strength, by molding a mixture of short fibers and water using a dehydrating mold, drying the mixture, and impregnating the mixture with a resin liquid while the inside of a mold is being deaerated. CONSTITUTION:The mixture (AB) of short fibers (A) and water (B) in a hopper 7 is scattered via a line 5 and a jet outlet 6 into the desirably shaped dehydrating mold 1 (the reference numeral 3 indicates the dehydrating space) supported by a base mold 2, while vacuum is applied by a pump 4 to dehydrate it to form a short fiber item 9, and then it is dried by a hot air current. Said short fiber item 9 is removed from the dehydrating mold 1, and after it is contained in the resin molding mold 10 and a lid 11 is placed on it, while vacuum is applied as indicated at 12 to deaerate, the resin liquid 13 is injected to form the fiber- reinforced resin item.

Description

[Detailed Description of the Invention] The present invention is based on the fiber J111! This relates to the dt type≠9 of the iii resin product.

Conventionally, the molding method for fiber-reinforced resin products has been carried out by placing short fibers in a mold and then impregnating them with liquid, or by placing a mixture of short fibers and resin liquid in the mold, but neither method has been used. In this case, the short fiber content is low and the fully reinforced fiber JllIII resin product is expected to be right and round, and the short fibers will be biased to one side relative to the wall thickness, resulting in uneven reinforcement. was.

The present invention performs dehydration under reduced pressure while supplying a mixture of short fibers and water into a dehydration mold, dries the short fiber product molded in the dehydration mold, takes it out from the dehydration mold, and converts this fiber into a resin. The purpose of the present invention is to provide a method for molding a fiber-reinforced resin product by inserting it into a mold, sealing it, and supplying a resin liquid to the inside of the resin mold while decoupling the mold. By carrying out dehydration under reduced pressure while supplying the mixture into the container, a short fiber material with dense short fibers can be obtained, and a fiber-reinforced resin product in which the short fiber material is impregnated with ll1lyIiIt& can be obtained.

Hereinafter, 198 embodiments of the present invention will be described based on the drawings.

Referring to FIG. 1, (1) is a dehydrating type, shaped according to the molded product, and made of a perforated wire mesh plate. A dehydration cavity (3) is formed between the group 111 C2) supporting this dehydration mold (1) from the outside and the dehydration mold (1), and this □
The dewatering space (3) communicates with the pump (4). (5)
is a pipeline, at the tip of which is a dehydrated type (1) K
A facing injection port (6) is provided, and a hopper (6) is provided at the base end for storing a mixture (AB) of short-strength fibers and water.
7) is provided. (8) /fi short fiber manufacturing equipment.

The short fibers produced in the short fiber manufacturing device (8) and the water C) are supplied to the hopper (7), where the mixture (AB) and the pipeline (5), which becomes the mixture (B), are fed to the hopper (7). The water is transported and dehydrated m (1) K is supplied from the tip injection port (6). At this time, the own pump (4) is being operated, and therefore the mixture (AB) in the dehydration space (3) is
) is dehydrated under reduced pressure. Due to this vacuum dehydration, the short fibers (A) are pressed into #L in the dehydration 11 (1), and the mixture (AB) is successively supplied and layered one after another by this dehydration. That will happen. Finally dehydration 1!
(1) A defibrated material (9) with a high inner rcFi density is molded. This short fiber material (9) is dehydrated! It is dried with hot air in (1) and taken out as shown in FIG. This taken out short fiber material (9) is treated with resin acid I as shown in 3d.
# Inserted within the type (to), 9II! The mold 1 is sealed by the lid till K.

Next, from the side of this body, while performing vacuum deaeration A21, resin liquid II! Supply I. As a result, the air in the tank fabric (9) is replaced with the resin liquid 03, and then the resin liquid Q3 is cured to obtain the fiber lI#1 reinforced w-resin product.

In the above example, the mixture (AB) was transferred to the pipeline (
5), but in the case of mass production, it may be sent by conveyor fins, but if you put glue etc. in the Kusuiho, you can use a water-based binder to bind it one by one.

According to the method of the present invention, a short fiber product in which short fibers are densely polymerized (laminated) can be obtained by performing dehydration under reduced pressure while supplying the mixture into a dehydration mold, and this short fiber product The resin liquid can be impregnated into the resin without bubbles, and a fiber-reinforced resin product can be obtained which is uniformly reinforced with a large amount of light.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic front view;
FIG. 2 is a front view of the short fiber product, and FIG. 5 is a front view of the short fiber product when it is impregnated with resin liquid.

Claims (1)

[Claims] 1. Perform dehydration under reduced pressure while supplying a mixture of short fibers and water into a dehydration mold. Form the mixture in the dehydration mold, dry the short fiber material, take it out from the dehydration mold, and remove the short fiber material from the dehydration mold. When inserted into a resin mold, the fiber reinforcement 11 seals and supplies resin liquid while degassing the inside of the resin mold.
Molding of 11 items-0