Plastic injection molding method and system for increasing density of ceramic and metal molded products

Abstract

The invention provides a plastic injection molding method and system for increasing the density of ceramic and metal molded products. The system comprises a feed port; a filling device connected with the feed port and used for receiving and processing a raw material and injecting the raw material into a mold; the mold connected with the filling device and used for plastic injection filling; a temperature control module connected with the mold, comprising a heating piece and a cold water pump, and used for heating or cooling a mold core of the mold; a mold locking device connected with the mold and used for controlling an opening or closing degree of the mold; a temperature measuring module connected with the mold and used for detecting the real-time temperature of the mold core in the mold; a pressure sensor mounted on the mold and used for detecting an actual pressure value in a mold cavity of the mold; and a PLC control module connected with the filling device, the temperature control module, the mold locking device and the temperature measuring module and used for storing data of a first preset value, a second preset value, a first preset condition and a second preset condition. The method and the system can improve the density of the ceramic and metal molded products, and can uniformly fill the mold cavity to reduce the internal stress of the products.

Description

【Technical field】 [0001] The invention relates to the technical field of injection molding, in particular to an injection molding method and system for increasing the density of ceramics and metals. 【Background technique】 [0002] Injection molding machines are usually composed of injection system, mold clamping system, hydraulic transmission system, electrical control system, lubrication system, heating and cooling system, pressure detection system in the mold cavity, safety monitoring system, etc. The traditional metal and ceramic injection molding method is: set a constant mold temperature, set a multi-stage filling process with different speeds and different pressures, the mold will withstand the mold with high pressure before filling, and maintain a certain pressure after the multi-stage filling. Hold pressure. There are serious defects in this method, mainly in that: the low density of the molded product and the uneven filling internal stress lead to easy deformation ...

AI Technical Summary

Problems solved by technology

There are serious defects in this method, mainly in that: the low density of the molded product and the uneven filling internal stress lead to easy deformation and cracking after degreasing and sintering, which easily lead to unstable product dimensions and poor surface appearance, thin-walled and uneven thickness products There is no way to realize it, easy to produce internal stress deformation and post-deformation, obvious water lines, poor exhaust during filling process, resulting in scorching of products, ceramic and metal products of traditional injection molding process are not conducive to degreasing and sintering process, and many pores can be seen after polishing , more pitting, cracking, high overall production cost, low efficiency and low yield

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