Punching needle, threading needle, system and method for manufacturing foam sandwich preform

Abstract

The invention belongs to the technical field of a preparation process of a foam sandwich preform for a composite material structural member, and particularly relates to a punching needle, a threading needle, a system and a method for manufacturing a foam sandwich preform. The punching needle for manufacturing a foam sandwich preform is of a solid columnar structure and comprises a clamping part on the upper section and a punching part on the lower section. The clamping part is of a columnar structure with a polygonal section so that clamping can be facilitated. The punching part is of a cone structure with the diameter gradually decreased from top to bottom, and the section of the punching part is in a polygonal star shape or a gear shape. The punching needle is utilized, punching and sewing are completed in two steps, the phenomena of fuzzing, yarn breaking and the like caused by friction between fibers and solid foam in the sewing process can be effectively avoided, and therefore the purpose of improving the production efficiency is achieved. And the problem that the resin content of the through hole part is too high when the resin is introduced in a vacuum manner can be avoided.

Description

technical field [0001] The invention belongs to the technical field of preparation technology of foam sandwich preforms for composite material structural parts, more specifically, relates to a punching needle, yarn threading needle, system and method for making foam sandwich preforms, more specifically The invention relates to a perforating needle, a perforating device and a suturing method for making a foam sandwich preform with high compression resistance and shear resistance. Background technique [0002] The traditional sandwich structure is a light-weight and high-strength structure made of upper and lower layers of thin and rigid panels and a middle layer of light and thick core material. The thicker core material is bonded in the middle to keep the upper and lower panels away from the neutral plane. The section moment of inertia of the structure is greatly increased, and the bending resistance of the panel is fully exerted. The sandwich structure can greatly improve ...

AI Technical Summary

Problems solved by technology

[0006] In view of the defects of the prior art, the object of the present invention is to provide a perforating needle, threading needle, system and method for making a foam sandwich preform, by redesigning the structure of the perforating needle and threading needle, And adjust the punching system and punching method, and complete the punching and sewing in two steps to solve the problem of fiber fluffing, yarn breakage, low production efficiency and round holes in the punching and puncturing process of the existing foam sandwich preform. Problems such as excessive resin content in parts

Images