Injection molding method of glass fibers orientation in orienteering plastic part

Abstract

The invention discloses an injection molding method of glass fibers orientation in an orienteering plastic part. The problems that an existing injection molding method is complex, and the glass fiberorientation is difficult to control effectively are solved. According to the technical scheme, (1) a resin-based glass fiber material, a reduced iron powder and an adhesive are uniformly mixed to prepare an injection-molded raw material; (2) the set fiber orientation is taken as a reference, permanent magnets with an N pole and an S pole are arranged on the corresponding positions of the two sidesof a mold cavity in the injection mold correspondingly; and (3) the injection-molded raw material is injected into the mold cavity of the injection mold, the fibers in the injection-molded raw material are in the set fiber orientation state under the action of a magnetic field, the injection-molded raw material in the mold cavity are synchronously heated and cured to form the plastic part, and finally, the plastic part with the set glass fiber orientation is obtained through demolding. The method is very simple, the glass fiber orientation of the surface of the plastic part and the core partglass fiber orientation can be effectively controlled, the main structure and an internal layout of an existing injection mold are not changed, the fiber content is not changed, and the parameters ofthe injection molding process are not changed.

Description

technical field [0001] The invention relates to an injection molding method of a plastic part, in particular to an injection molding method for directional control of glass fiber orientation in a plastic part. Background technique [0002] In composite materials, fiber as a reinforcing material is a key component that determines the tensile strength, modulus, and elongation of composite materials, and the matrix material mainly plays the role of transmitting loads. In randomly oriented short-fiber composite plastic parts, the strength efficiency of the fibers is significantly lower than that of a single continuous fiber in the matrix material. Therefore, the low cost and high productivity of short-fiber composites are based on reducing the structural efficiency of plastic parts. for the price. In addition, the properties of short-fiber composites are unstable due to the random arrangement of fibers in the matrix. During compression molding, the geometry of the mold core ca...

AI Technical Summary

Problems solved by technology

Although a lot of experimentation has been done for this, it is not of much practical value

[0006] Fiber orientation is a problem that has been relatively difficult to control and solve so far. Under certain conditions, the problem of fiber orientation can be improved by reducing the fiber content or changing the structure of the mold cavity, but it cannot be better. Consciously control the fiber Orientation, fiber distribution, therefore need to be improved

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