Mold for production of continuous fiber reinforced thermoplastic plastic

Abstract

The invention relates to a mold for the production of continuous fiber reinforced thermoplastic plastic. The mold is characterized in that a continuous fiber yarn bundle is fed from a left mold wall and discharged from a right mold wall; two or more groups of fiber dispersion bodies are mounted in a mold cavity; each group of fiber dispersion bodies comprises two fiber dispersion blocks which are parallel to each other; all the groups of fiber dispersion bodies are parallel or unparallel to one another; the continuous fiber yarn bundle gets in contact with the sequentially-arranged fiber dispersion blocks from left to right; the surface, being in contact with each fiber dispersion block, of the continuous fiber yarn bundle is designed to be a cylindrical surface; an included angle of 0-25 degrees is formed between the axial direction of each cylindrical surface and the perpendicular direction between a front mold wall and a rear mold wall; and all fibers distributed along the width direction of the continuous fiber yarn bundle have the same traveling-passing length in the mold cavity, and are prevented from gathering when passing through the mold cavity. By adoption of the mold provided by the invention, the dispersion width of the continuous fiber yarn bundle is increased, the adjacent fibers are bent at different time, the fiber dispersion efficiency is improved, the situation that the continuous fiber yarn bundle is broken is reduced, and the production quality is improved.

Description

[0001] Technical field: [0002] The invention relates to the field of mold equipment, in particular to a mold for producing continuous fiber reinforced thermoplastics. [0003] Background technique: [0004] Long fiber reinforced thermoplastics is a high-performance material, which is a substitute for traditional short fiber reinforced plastics. Compared with the latter, the mechanical properties can be improved by 30-300%. [0005] The conventional production process of long fiber reinforced thermoplastics is: continuous reinforcing fiber yarns pass through a dipping die, merge with the molten resin from the extruder in the die cavity and are soaked by the resin, and cut into pellets of a certain length after exiting the die , the fibers are continuous along the length of the pellets, and the reinforcing fibers used can be glass fibers or carbon fibers, etc. This process can also be used to produce continuous fiber-reinforced thermoplastic rods, belts, profiles, etc. [0006...

AI Technical Summary

Problems solved by technology

However, because the lengths of the flow channels along the transverse direction of the fiber yarn bundles are not the same, when the pressure in the mold cavity fluctuates, the yarn bundles tend to gather at the position with the shortest flow channel length, which instead causes the yarn bundles to accumulate together.

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