Forming device and forming method of continuous fiber reinforced thermoplastic resin preimpregnation sheet material

Abstract

The invention discloses a forming device and a forming method of a continuous fiber reinforced thermoplastic resin preimpregnation sheet material. The forming device comprises a creel, a fiber pre-dispersing device, a single-screw extruder, a screw-type smelting immersing mold, a secondary rolling device, a cooling traction machine and a coiling machine; 1 to 3 screw immersing rolls are arranged in the screw-type smelting immersing mold, a screw groove is formed in the outer surface of each screw immersing roll, and each screw immersing roll is driven by a motor to rotate in the screw-type smelting immersing mold. When the screw immersing rolls rotate, resin flows along the screw groove so as to immerse the fiber in the longitudinal direction, due to the extrusion effect, melt can flow along the direction perpendicular to the fiber, and the transverse immersion can be realized. The continuous fiber reinforced thermoplastic resin preimpregnation sheet material prepared by utilizing the forming device is good in impregnation effect, high in impregnation efficiency and good in production stability, so that a product excellent in performance can be obtained.

Description

technical field [0001] The invention relates to continuous fiber-reinforced thermoplastic resin composite materials, in particular to a molding device and method for continuous fiber-reinforced thermoplastic resin prepreg sheets. Background technique [0002] Continuous fiber-reinforced thermoplastic resin is a reinforced thermoplastic resin whose reinforcing fibers are arranged in one direction and whose length is equal to that of the product. Internal transfer load. Compared with ordinary short fiber reinforced thermoplastic resins, it has more outstanding mechanical properties, heat resistance, warpage resistance, dimensional stability, etc., so it can manufacture products with excellent mechanical properties, such as auto parts, electronic devices , chemical components, etc. [0003] There have been some disclosed impregnation equipment and impregnation methods for preparing continuous fiber reinforced thermoplastic resins. The common feature of these molding methods i...

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Problems solved by technology

But the disadvantages of these equipment are: (1) The wrapping angle formed by the fibers alternately bypassing the tension roller is too small. Since the fiber impregnation is mainly achieved by the pressure formed by the wrapping tension roller, the smaller the wrapping angle, the better the fiber impregnation effect. Poor; (2) In order to increase the cladding angle, it is necessary to increase the number of tension rollers. The increase in the number of tension rollers will cause the impregnation mold to be too long. The longer the mold, the more aggregates and the greater the melt resistance, which will affect the stability of pultrusion (3) The tension roller in the impregnation mold is stationary, and the fibers passively bypass the tension roller, resulting in large resistance, which affects the impregnation effect of fibers and the stability of extrusion, especially difficult to achieve impregnation in the transverse direction of fiber bundles

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