Pultrusion die for material compounding

Abstract

A pultrusion die for material compounding comprises a glue injection box, a forming die and one or more core dies. The glue injection box comprises a channel for the core die to penetrate, the channelis provided with a feeding port and a discharging port, a guiding strip is arranged in the channel, the guiding strip extends to one side of the discharging port from one side of the feeding port, one end of the core die is supported or fixed through the guiding strip, the other end of the core die is arranged in a cavity of the forming die, and the distance between the core die and the inner wall of the cavity of the forming die is kept stable through the guiding strip. When fiber passes, liquid base materials in the glue injection box forwards move together along with the fiber, since the area of the cross section of the channel is gradually reduced, the inner pressure of the liquid base materials is increased, accordingly, the fiber can be rapidly soaked, and a composite material precursor is formed; and the composite material precursor passes through the two sides of the guiding strip and is gathered nearby an inlet of the cavity of the forming die to enter a gap between the coredie and the inner wall of the cavity of the forming die to be cured or sized into a composite material with a cavity, and accordingly, the precision of the composite material cavity wall thickness isimproved.

Description

technical field [0001] The invention relates to the technical field of composite material pultrusion, in particular to a pultrusion die for material composite. Background technique [0002] A composite material is a material with obvious phase separation characteristics formed by mixing two or more materials. Its morphology and performance are different from any of the individual materials. Its main components are matrix materials and reinforcing materials, of which fibers are the most commonly used. reinforcement material. Generally, composite materials refer to materials in their final form after forming, while materials in which the matrix material is mixed with reinforcing materials in the form before final forming are called composite precursors. The pultrusion process is to continuously produce composite materials of unlimited length by curing or shaping continuous fiber yarns and fabrics impregnated with a liquid matrix material under the action of traction force thr...

AI Technical Summary

Problems solved by technology

The resin continuous injection method is rapidly used in composite pultrusion, but it is difficult to achieve high wall thickness accuracy in the manufacture of pultruded composite products with cavities

This is because in composite pultrusion molding, one end of the mandrel needs to be freely suspended in the injection box and the mold cavity at the same time, which causes the cantilever length of the mandrel to be greatly lengthened and is easy to be placed in the mold. Shake or rotate in the cavity, resulting in a change in the gap size between the mandrel and the mold cavity, which reduces the wall thickness accuracy of the composite material cavity. There are improvements in the prior art

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