Forming equipment and forming method for macrofiber-reinforced thermoplastic resin

Abstract

The invention discloses forming equipment for macrofiber-reinforced thermoplastic resin, which comprises equipment for decomposing fiber rings into fiber bundles and pretreating and equipment for impregnating fibers fully and forming by melting resin, wherein fiber bundle independent channels of the equipment for decomposing the fiber ring into the fiber bundle and pretreating are connected with a fiber pre-puffing and preheating system; a fusant inlet die of the equipment for impregnating the fibers fully and forming by the melting resin is communicated with a fiber impregnating body by a fuscant flowing channel and inclines upwards to form a certain angle, and a fiber inlet die is used for connecting the fiber pre-puffing and preheating system and the fiber impregnating body, so that the fibers enter the fiber impregnating body horizontally, and the other end of the fiber impregnating body is connected with a forming die. A preparation method for the macrofiber-reinforced thermoplastic resin comprises the following steps that: (1) after passing through respective independent channels, 20 to 40 bundles of fibers enter the fiber pre-puffing and preheating system in a mode of arranging in one line, and when the fiber bundles pass through a preheating guiding roller, the fibers contact a circular arc surface of the guiding roller, so that the fiber bundles are in a cloth or ribbon shape under the stretching action of traction, wherein the fiber bundles play the pre-puffing effect; (2) after being led into the fiber inlet die and a fiber input hole of the impregnating body horizontally, the pre-puffed and preheated fiber bundles pass through a fiber tension roller in the impregnating body up and down in a staggered mode, wherein the fiber bundles are in a cloth or ribbon shape when contacting the fiber tension roller; and (3) immersed macrofibers and material flow pass through an output channel and the forming die of the impregnating body.

Description

technical field [0001] The present invention relates to a long-fiber-reinforced thermoplastic resin molding equipment, specifically, including fiber loops decomposed into fiber bundles and pretreatment equipment, molten resin fully impregnating and forming equipment for fibers; the present invention also relates to a long-fiber-reinforced thermoplastic resin Resin molding method. Background technique [0002] Long fiber reinforced thermoplastic resin means that the fiber orientation is completely in the same direction, and the length of the obtained fiber is consistent with the length of the plastic particle. Compared with fiber-reinforced resins prepared by conventional methods, it has better mechanical properties, endows products with higher stiffness, strength, impact resistance, creep resistance and better microscopic quality. In the automotive industry, home appliances, machinery and other places, it can replace some cast iron, aluminum and thermosetting plastics, etc....

AI Technical Summary

Problems solved by technology

However, the published patents all have some common defects: 1) The resin has poor impregnation effect on the fiber, and the fiber is easy to break when passing through the impregnated body, thus affecting the quality and production efficiency of the product; 2) The impregnated body and the melt inlet die , the fiber inlet die, and the shaping die are integrated as a whole. When the above-mentioned die flow channel needs to be replaced due to wear and tear, the cost is relatively high

[0007] The disadvantages of the above-mentioned prior patents are that (1) the molten resin enters the impregnated body in a horizontal manner, and the length of the long fibers in the shape of cloth or tape is slightly longer than the contact length, and the fibers at the non-contact point of the curved channel are subjected to tensile force However, it quickly returns to the round bundle shape, which reduces the infiltration effect of the molten resin on the circular bundle-shaped central fiber; (2) The fiber bundle is bonded together by many fiber filaments to affect the infiltration effect of the molten resin on the fiber; (3) Fiber and resin If the temperature difference is too large, it will cause poor infiltration of the fiber; (4) The fiber inlet die flow channel, the melt inlet die flow channel, the impregnation flow channel and the shaping die flow channel are an integral part, which is easy to cause equipment wear , resulting in the need to replace the entire impregnated body, wasting installation costs

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