JPS5936720B2 - Method for forming short fibers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of forming a short fiber product by laminating short fibers such as short glass fibers.

The above short fiber material can be made into a fiber-reinforced resin product by impregnating it with a resin liquid and curing it.

By the way, if short fibers are simply laminated, they will be cotton-like, and fiber-reinforced resin products using this cannot be made sufficiently reinforced due to the low content of short fibers.

The present invention provides a plurality of dehydration molds on the inner peripheral surface side of the rotating cylinder,
A method for forming a short fiber product is provided, in which a mixture of short fibers and water is supplied into the rotating cylinder, and the short fiber product is formed in each dehydration mold while performing centrifugal dehydration. The short fibers can be easily and uniformly supplied to the dewatering mold using the fluidized mixture, and since they are centrifugally dehydrated at the same time as the supply, the centrifugal force allows for sufficient dewatering and at the same time allows for dense lamination. It will be possible.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a rotating cylindrical body, which is supported by a plurality of rollers 2 and is rotatable around a horizontal axis 3. As shown in FIGS.

An inner cylinder 4 having an uneven shape in the lateral and circumferential directions is installed inside the rotating cylinder 1, and through holes 6 are provided at the ends of the plurality of recesses 5 of the inner cylinder 4, and each through hole A dehydrating mold 7 is attached to the outside of the mold 6.

The dewatering mold 7 is made of a wire mesh or a perforated plate, and is molded in advance to match the shape of the fiber-reinforced resin product to be obtained.

A supply pipe 8 that is movable on the horizontal axis 3 is provided, and an injection port 9 that can face the inner cylinder 4 is provided at the tip of the supply pipe 8.
is provided, and a mixture A of short fibers A and water B is provided at the proximal end.
A hopper 10 for storing B is provided.

11 is a short fiber manufacturing device, and 12 is a dehydration space.

While rotating the rotary cylinder 1 around the horizontal axis 3, the supply pipe 8 is
is moved on the horizontal axis 3, and the mixture AB is supplied from the injection port 9 at the tip toward the inner cylinder 4.

That is, the short fibers A and water B manufactured by the short fiber manufacturing apparatus 11 are supplied to the hopper 7, where they become a mixture AB.

This mixture AB is supplied toward the inner cylinder 4.

At this time, as mentioned above, the rotating cylinder 1 is being rotated,
Therefore, the mixture AB supplied into each dehydration mold 7 is centrifugally dehydrated, the water B is discharged to the dehydration space 12 side, and the short fibers A are received in the dehydration mold 7.

At this time, the short fibers A are pressed into the dehydration mold 7, and in this state, the mixture AB is successively supplied and layered one after another.

Finally, short fibers 13 with a high density are formed in the dehydration mold 7.

This short fiber material 13 is subjected to hot air W in the dehydration mold 7, and then taken out as shown in FIG.

The taken out short fibers 13 are inserted into a resin mold 14 as shown in FIG.
It is sealed by 5.

Next, resin liquid 17 is supplied from the lid 15 side while performing vacuum degassing 16.

As a result, the air in the short fiber material 13 is replaced with the resin liquid 17, and the resin liquid 17 is then cured to obtain a fiber-reinforced resin product.

According to the method of the present invention described above, the short fibers can be easily and uniformly supplied to the dewatering mold using the fluidized mixture, and furthermore, since the short fibers are centrifugally dehydrated at the same time as the supply, the centrifugal force of the short fibers is sufficient. It is possible to perform dehydration and at the same time to densely laminate the fibers, so that fiber-reinforced resin products using the same can be sufficiently reinforced with a low content of short fibers.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a longitudinal side view, and Fig. 3 is an enlarged front view of main parts.
FIG. 4 is a perspective view of the short fiber product, and FIG. 5 is a longitudinal sectional front view of the short fiber product during resin molding. 1...Rotating cylindrical body, 4...Inner cylindrical body, 5.
...Recess, 6...Through hole, 7...
・Dehydrated type, 13...Short fibers, 14...
・Resin mold, A... Short fiber, B...
Water, AB... mixture.

Claims (1)

[Claims] 1. A plurality of dehydration molds are provided on the inner peripheral surface side of the rotating cylinder, a mixture of short fibers and water is supplied into the rotary cylinder, and short fibers are formed in each dehydration mold while performing centrifugal dehydration. Method for forming short fibers.