The Study On Injection Molding Process Of Precision Ceramic Parts

The ceramic material is an important building material,with its molding products used in various fields,this paper studies the ceramic structure is a core component of mining and blasting system,for the application to meet the demand of complex service environment and high load,the structure has very high precision and excellent mechanical properties.Injection molding is one of the ceramic forming methods,which is suitable for micro structures with high forming precision.Domestic research on injection molding technology started late,and there is a large space for technological research.Based on this,the purpose of this paper is to study the process of ceramic injection molding in order to prepare precision ceramic structural parts.The aluminum oxide powder with mass fraction of 99.9% was used as raw material,and the process of preparing the structural component was studied.Focus on,feed formula,the suitable injection molding feedstock to 53% solids content,binder ratio: 12wt% PE,6wt%PP,50wt%PW,4wt%SA,28wt%titanate.mixed effect,material order on the feeding performance results show that alumina powder binder with high melting point at the same time the first heating reaches a certain temperature after adding a binder with low melting point,the feedstock uniformity,and adding two times of mixing can improve the feeding uniformity.influence molding stage of the injection molding parameters on the quality of the sample,and the parameters were optimized.Results: the optimal injection parameters injection temperature:four temperature stages 100 ℃-110 ℃-120 ℃-125 ℃,injection pressure injection speed:85 MPa;60 g/s.modification of the mold,the mould temperature 40℃to50℃,the mold cavity is coated on the surface of organic silicone oil release agent,can improve the surface quality of samples,and solve the difficult problems of membrane stripping;put forward two step degreasing techniques,the results show that the gasoline is heptane degreasing is both efficient and cost saving.the two step degreasing time total time 8.h,compared with the traditional thermal debinding greatly reduces the time-consuming degreasing stage.The structure of products by the process forming rate of around 60%,qualified structures have been applied to engineering practice,not only to meet the market demand,but also has great innovation and breakthrough in the injection molding process.