Forming mold and forming method of continuous fiber reinforced thermoplastic pipe

Abstract

The invention relates to a forming die of a continuous fiber-reinforced thermoplastic plastic pipe and a forming method of the forming die. The forming die comprises a machine body, wherein a shaft sleeve, a beam splitting block and a mouth die are sequentially arranged in the machine body along the axial direction; the beam splitting block is fixed by the mouth die on the rear side and the shaft sleeve on the front side, and arc-shaped beam-splitting slits are formed in the beam splitting block; the rear end of the mouth die is locked through a locking nut connected with the machine body; the front end of the beam splitting block is fixedly connected with a spindle. The forming method comprises the following steps: (1) segmenting a molten continuous fiber-reinforced thermoplastic resin-based impregnation tape into multiple arc sections; (2) superposing various layers of segmented impregnation tape; (3) adhering the various layers of impregnation tape; (4) fusing each layer of the impregnation tape to form a tube billet; and (5) sizing the pipe, cooling through a cooling device, cutting through a cutting device, and forming the pipe. The axial bearing capacity of the pipe is greatly improved, so that the axial stiffness of the pipe is greatly improved.

Description

technical field [0001] The invention relates to a molding die and a molding method for a continuous fiber reinforced thermoplastic pipe, and belongs to the technical field of continuous fiber reinforced thermoplastic pipe preparation. Background technique [0002] Continuous fiber reinforced thermoplastic pipe is a kind of thermoplastic pipe in which the reinforcing fibers are wound at a certain angle along the circumference or arranged in parallel along the axial direction. [0003] Continuous fiber reinforced thermosetting plastic pipes have been widely produced and used for a long time. Continuous fiber-reinforced thermoplastic pipes are usually formed by winding, and the fibers are arranged in parallel along the axial direction to reinforce less. [0004] Winding thermoplastic pipes are usually continuous fiber reinforced thermoplastic resin based prepreg tape wound reinforced plastic pipes. [0005] Patent CN201220738914, the continuous fiber-reinforced pipe includes ...

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Problems solved by technology

[0011] This method realizes the parallel arrangement of fibers along the axial direction to prepare continuous fiber-reinforced thermoplastic pipes. However, due to the high viscosity of the thermoplastic resin, the effect is poor due to simple impregnation, and it is difficult to achieve a uniform arrangement of fibers along the circumferential direction.

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