A mold for forming a stepped carbon fiber bonded body and its use method

Abstract

The invention discloses a mold for forming a step-shaped carbon fiber cohesive body and an application method thereof, and belongs to the technical field of inorganic nonmetallic material forming. Themold comprises an upper mold body, a lower mold body, a base and a locking part; the upper mold body is composed of an upper mold fixing plate, a cylindrical pressure head and a cushion block, wherein the upper mold fixing plate and the cylindrical pressure head are connected through screws, and the cushion block is arranged at the lower part of the cylindrical pressure head; the lower mold bodyis composed of a circular ring, a forming cavity and a lower mold fixing plate, wherein the circular ring is in interference fit with the forming cavity, and the lower mold fixing plate is connected to the lower end surface of the circular ring; the base plays a supporting role; the locking part is used for locking the upper mold body and the lower mold body; the upper mold body is matched with the lower mold body; and the lower mold body is arranged on the base. The mold has the advantages that the structure is compact and reasonable, in the forming process of the step-shaped carbon fiber cohesive body, no carbon fiber escapes, the fluidity of resin is good, the forming resistance is small, the upper mold body moves downwards smoothly, the step-shaped carbon fiber cohesive body prepared through the mold is completely formed, and the use is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of forming inorganic non-metallic materials, and relates to a mold for forming a stepped carbon fiber bonded body and a use method thereof. Background technique [0002] Carbon fiber is a new type of inorganic non-metallic material, the carbon content is not less than 90%, and its shape is fibrous. Carbon fiber has many excellent physical and chemical properties such as low density, high strength, high temperature resistance, corrosion resistance, small thermal expansion coefficient, and low resistivity. However, carbon fiber is soft and loose. In order to give full play to its performance, a small amount of resin can be added to carbon fiber, and the fiber material can be bonded into a whole through resin to realize the synergistic effect between fiber and resin material to form a carbon fiber bonded body. After subsequent processing, the junction can be made into heat insulating materials, porous material...

AI Technical Summary

Problems solved by technology

The characteristics of its unqualified molding are: (1) During the molding process, a small amount of carbon fiber will escape, the resin fluidity is poor, the resistance of the molding process is large, hydraulic pressure is required, and there are potential safety hazards; (2) The stepped carbon fiber bonded body and The inner wall of the mold has a strong adhesive force. When taking it out, it needs to be tapped continuously, and the bonded body is easily damaged; (3) The step part is defective and the molding is incomplete

Analysis of the reason is that the mold design is unreasonable; among them, the forming resistance is large, and some carbon fibers will escape, because the position, structure and size of the excess resin removal hole are unreasonable

The bonded body is easily damaged when it is taken out, which is caused by incorrect mold material and demolding method

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