Impregnation mold of continuous/fiber reinforced thermoplastic composite material, and use method thereof

Abstract

The invention relates to an impregnation mold for continuous / fiber reinforced thermoplasticity, and a use method thereof, and belongs to the technical field of preparation of a continuous / fiber reinforced thermoplastic composite material. The impregnation mold provided by the present invention comprises a body. The technical points of the body are that: a fiber impregnation flow channel is arranged in the body; an upper portion of the fiber impregnation flow channel is connected with a guidewire block; the guidewire block is provided with silk separating holes; the silk separating holes are communicated with the fiber impregnation flow channel; a side portion of the body is provided with a impregnation melt feeding inlet; the impregnation melt feeding inlet is communicated with the fiber impregnation flow channel. The use method comprises that: continuous fiber enters into the impregnation mold through the silk separating holes on the guidewire block, and contacts molten thermoplasticresin; the fiber passes through a ring-shaped and ripple-like impregnation flow channel between a circular ripple revolving body core shaft and an inner wall of the body chamber, wherein the inner wall has the same shape as the external surface of the circular ripple revolving body core shaft; then the fiber bundle are forced to be expanded and dispersed to realize the impregnation of the fiber by the resin. According to the present invention, impregnation efficiency is high, and dispersion of the fiber is realized well during the impregnation process.

Description

technical field [0001] The invention relates to a continuous / long fiber reinforced thermoplastic impregnation mold and a method for using the same, belonging to the technical field of continuous / long fiber reinforced thermoplastic composite material preparation. Background technique [0002] Continuous / long fiber reinforced thermoplastic composites are composites in which the reinforcing fibers are arranged in one direction and have the same length as the composite pellets. [0003] Continuous fibers are impregnated and pelletized to obtain long fiber reinforced thermoplastic composites (LFT), specifically referring to plastic pellets formed by melting and compounding reinforced fibers (such as glass fibers, carbon fibers, aramid fibers, etc.) with a length of more than 8 mm and thermoplastic polymers or products. LFT has the advantages of high strength, high rigidity, dimensional stability, low warpage, fatigue resistance, creep resistance, etc. It can greatly improve the ...

AI Technical Summary

Problems solved by technology

Although this kind of flow channel can impregnate the fibers, the fibers are actually impregnated along the curved strip-shaped convex surface in the flow channel, which cannot disperse the fibers well.

Patent CN 1827671A discloses an improved impregnation mold with curved channel, which is characterized in that the peak height in the curved channel decreases from the melt inlet to the outlet, but there is still a problem that the fibers cannot be well dispersed during the impregnation process

Patent CN 101913255A discloses a continuous fiber-reinforced thermoplastic composite impregnation mold, which is characterized in that a disc spreader is installed on the adjustment shaft, and the fibers are dispersed and opened under the action of the disc spreader, thereby Realize the impregnation of fibers, but the thermoplastic resin will stay in the gap between the discs during the impregnation process, and it must be cleaned regularly, which will affect its continuous production

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