Extrusion pin mechanism

Abstract

The invention relates to an extrusion pin mechanism. The mechanism comprises a fixed plate, an oil cylinder, an insert pin plate and at least one extrusion pin. The oil cylinder is arranged on the fixed plate. The insert pin plate and the fixed plate are arranged in a sliding manner. The output end of the oil cylinder is connected with the first end face of the insert pin plate and drives the insert pin plate to move relative to the fixed plate. The first end of the extrusion pin is arranged on the second end face of the insert pin plate. According to the extrusion pin mechanism, a novel technology that the insert pin plate drives an extrusion pin needle to conduct extrusion is adopted, the extrusion function of a mold is achieved in a narrower space, and the problem that the extrusion pin cannot be added due to the fact that the mold space is not enough is solved. The structure is simple, the mold structure is greatly simplified, and implementation is easy.

Description

technical field [0001] The invention relates to the technical field of extrusion pins, in particular to an extrusion pin mechanism. Background technique [0002] The die-casting process is the process of unifying pressure, speed and time by using the three major elements of die-casting machine, mold and alloy. For metal thermal processing, the existence of pressure is the main feature that distinguishes die casting process from other casting methods. Die casting is a fast-growing special casting method with less cutting and no cutting in modern metal processing technology. It is the process of filling the mold with molten metal at high pressure and high speed, and crystallizing and solidifying under high pressure to form a casting. [0003] In order to increase the density of castings and compress the pore size and shrinkage volume as much as possible, there is a kind of die-casting called "squeeze die-casting". Squeeze die-casting is to set "extrusion pins" in places whe...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the die-casting molds in the die-casting industry use extrusion pins, and the extrusion cylinders are used to push the extrusion pins to move, so as to realize the extrusion of defective parts. When the mold space is small and the thimble and water are interfered , the squeeze pin cannot be used in some places

[0005] In addition, due to the high temperature of the mold during the die-casting process, the gap between the extrusion pin and the pin sleeve is likely to be stuck due to thermal expansion. mold, resulting in thermal fatigue of the pin, easy surface cracking, greatly reducing the service life of the extrusion pin, and making it difficult to produce in batches

Images