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熔模制造是熔模铸造中的一个主要问题,制造熔模的材料称为模料,在航空工业生产中,往往采用压注温度为70～100℃的中熔点模料压注模型。由于熔模铸造生产的铸件表面要求光洁度高、尺寸精确,因而相应地要求压注的模型表面光洁、尺寸精确。本文就生产中膏状(粥状)模料的颗粒大小及其控制问题,作如下介绍。一、膏状模科中颗粒大小对工艺性能的影响模料必须呈一定大小的颗粒才能压注出优质模型。模料的颗粒尺寸一般以0.2～0.3毫米为宜。压注模型时,由于模料中存在细小的颗粒,就构成了很多微小的排气通道,当模料压入压型后,模料中的气体在
Melt mold manufacturing is a major problem in investment casting. The material used to make the mold is called the mold material. In the aviation industry, the middle-melting mold material injection model with the injection temperature of 70-100 ° C is often used. Due to the casting surface casting production requirements of high finish, the size is accurate, and therefore require the pressure injection model surface smooth, accurate size. This article on the production of paste (gruel) mold particle size and control issues, as follows. First, the paste mold section of the size of the particle size of the process performance of the mold must be a certain size of the particles can be injected into the high-quality model. The particle size of the material is generally 0.2 ~ 0.3 mm is appropriate. Injection pressure model, due to the presence of small particles in the mold, it constitutes a lot of tiny exhaust channel, when the mold pressed into the pressure type, the gas in the mold at