Production equipment and method for long fiber reinforced thermoplastic

Abstract

The invention discloses a dispersed structure during production of long fiber reinforced thermoplastic when grey yarns are impregnated, an impregnating mould head that uses the dispersed structure and a production method that uses the impregnating mould head. The dispersed structure provided by the invention is provided with a rotary dispersing core that is capable of dispersing the grey yarns effectively, has small abrasion and is not easy to break the mould head. The impregnating mould head that comprises a plurality of impregnating units and uses the structure is convenient to disassemble and has good universality and high efficiency. Compared with prior production method, the production method for long fiber reinforced thermoplastic that uses the impregnating mould head uses multiple strands and units to impregnate so that reinforced fiber is distributed uniformly in the bar (cross section) and ensures that fiber is not exposed so as to improve the production efficiency and quality. Meanwhile, as monofilament is not easy to break the mould head, the continuous production capacity of the production equipment is high.

Description

technical field [0001] The present invention relates to the production equipment and production method of long-fiber reinforced plastics, in particular to an impregnated structure capable of fully dispersing long-fiber raw yarns, and also relates to an impregnated die using the structure, and using the impregnated die to produce long-fiber-reinforced plastics Methods of fiber reinforced plastics. Background technique [0002] Long-Fiber Reinforced Thermoplastic (LFT for short) is a kind of designability, low density, high specific strength, high specific modulus and strong impact resistance. , Fiber-reinforced thermosetting composites pose a huge challenge, and LFT thermoplastics have gradually become mainstream materials for making automotive parts. [0003] In the process of producing LFT, it is necessary to disperse the raw yarn of long fiber materials (such as glass fiber and carbon fiber) into monofilaments in the extruder head so that the molten plastic can be fully i...

AI Technical Summary

Problems solved by technology

[0006] Both of the above two technical solutions adopt a single-strand raw yarn to enter the impregnation chamber, and use a tension roller to disperse the long-fiber raw yarn. The number is the tex value,) the original yarn, the general number range is between 1200-2400tex, a raw yarn contains about 4000 to 5000 monofilaments, if you need to achieve a good dispersion effect, often need a long dipping There are multiple sets of tension rollers in the cavity for multi-level dispersion, so the work efficiency is greatly limited

In addition, since the tension roller can only disperse the raw yarn in the axial direction of the tension roller, that is to say, the raw yarn passing through the tension roller is only scattered in one dimension, and the monofilament spread is limited, and the soaking effect is not maximized. It is difficult for them to be evenly distributed in the cross-sectional space of the strip during extrusion molding

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