用陶瓷浆料制成铸型生产铸件的铸造方法。陶瓷浆料由硅酸乙酯水解液和质地较纯、热稳定性较高的细耐火砂如电熔石英、锆英石、刚玉等混合而成。为使陶瓷浆料在短时间内结胶，常加入氢氧化钙或氧化镁作为催化剂。由于使用的耐火材料成分及其外观都与陶瓷相似，故称为陶瓷型。陶瓷型铸造是在普通砂型铸造基础上发展起来的一种新工艺。陶瓷型有两种类型：①陶瓷型全由陶瓷浆料浇灌而成。其制作过程是先将模样固定于型板上，外套砂箱，再将调好的陶瓷浆料倒入砂箱，待结胶硬化后起模,经高温焙烧即成为铸型。②采用衬套,在衬套和模样之间的空隙浇灌陶瓷浆料制造铸型。衬套可用砂型，也可用金属型。用衬套浇灌陶瓷壳层可以节省大量陶瓷浆料，在生产中应用较多。陶瓷型铸件表面粗糙度可达Ra10～1.25微米,尺寸精度高达3～5级,能达到少无切削加工的目的。陶瓷型铸造生产周期短，金属利用率高。最大铸件可达十几吨，主要用于铸造大型厚壁精密铸件和铸造单件小批量的冲模、锻模、塑料模、金属模、压铸模、玻璃模等各种模具。陶瓷型铸造模具的使用寿命可与用机械加工方法制成的模具相媲美，而制造成本则比用机械加工方法制成的模具低。

Casting method of producing castings by casting mould with ceramic slurry. Ceramic slurry is composed of ethyl silicate hydrolysate and fine refractory sand with relatively pure texture and high thermal stability, such as fused quartz, zircon and corundum. In order to make the ceramic slurry cemented in a short time, calcium hydroxide or magnesium oxide are often added as catalysts. Because the composition and appearance of refractories used are similar to those of ceramics, they are called ceramics. Ceramic mould casting is a new technology developed on the basis of common sand casting. There are two types of ceramics: 1. All ceramics are irrigated by ceramic slurry. The production process is to fix the pattern on the mold plate, coat the sand box, and then pour the adjusted ceramic slurry into the sand box, to be cemented and hardened, and then to be molded, and then to be baked at high temperature. (2) Casting moulds are made by pouring ceramic slurry into the gap between bushing and pattern with bushing. The bushing can be made of sand or metal. Casting ceramic shell geshanb.89ix.comtaiyangn.89ix.comgelidun.89ix.comgangguanp.89ix.comtongshizi.71ix.comzhuza

ojm.37ix.com.cnwith bushing can save a lot of ceramic slurry, which is widely used in production. The surface roughness of ceramic castings can reach Ra10-1.25 micron, and the dimension accuracy can reach 3-5 grade, which can achieve the goal of less or no cutting. The production cycle of ceramic mould casting is short and the utilization rate of metal is high. The largest castings can reach more than ten tons, mainly used for casting large-scale thick-walled precision castings and small batches of die, forging die, plastic die, metal die, die-casting die, glass die and other moulds. The service life of ceramic mould casting die is comparable to that of the die made by mechanical processing method, while the manufacturing cost is lower than that of the die made by mechanical processing method.