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当前位置:陶壳模法系以硅酸胶溶体为结合剂介绍
[来源:www.hslcasting.com.cn] [作者:精密铸造] [日期:17-02-10]
陶壳模法系以硅酸胶溶体为结合剂,混合耐火材料粉末填充剂及胶凝体化促。 Ceramic shell mould law with silica gel solution as binder, mixed refractory filler powder and gel to promote. 进剂,作成浆体。将有充分流动性的浆体浇覆于模型表面,待浆体凝结,后脱模,以700℃脱水,干燥,以1000℃烧成以提高强度,做成陶壳模。陶壳模的厚度为3~20mm,浇注大型铸件时,其背面须衬垫,以托撑材料以承体金属熔液之重量。 Into the agent, made into slurry. Will be sufficient liquidity of slurry water the cover on the model surface, slurry condensation, after demoulding, with 700 ℃ dehydration, drying, with 1000 ℃ sintering in order to improve the strength, make ceramic shell mold. The thickness of the ceramic shell mold for 3 ~ 20 mm, pouring large castings, it must be on the back pad, to support materials to the weight of the bearing body of the molten metal. 模型材料在量少时使用表面处理过的材料,大量生产时使用金属或树脂,填充剂使用高纯度、高熔点的耐火材料以防止与熔融金属产生反应,其材质依浇铸金属的种类而定,耐火材料的粒度分布是大粒子混以小粒子粉粒,可获得适度的强度与表面度,胶凝体化促进剂使用的目的在于加速结合剂的固化,一般使用碱性物如碳酸铵等。调整填充剂与结合剂之重量百分比,可控制浆体之流动性,陶壳模之强度与透气性。填充剂之使用量使泡成浆体之体积为结剂体积的1.5~2.5倍。 Model material used in small amount of surface treatment materials and mass production with a metal or resin, filler with high purity, high melting point of refractory material in order to prevent and respond to molten metal, its material depends on the kind of casting metal, particle size distribution of refractory material is big particles mixed with small particle powders, moderate intensity can be obtained with surface, gel used for the purpose of promoting agent is to accelerate the curing of bond, the general use of alkaline substances such as ammonium carbonate, etc. Adjust the weight percentage of filler and binder, controllable pulping of liquidity, strength and permeability of the ceramic shell mold. Filler usage of the bubble into the volume of slurry to knot agent volume of 1.5 ~ 2.5 times. 陶壳模之背托撑模可以使用干燥模、油砂模、二氧化碳模,也可以使用永久性的金属模。陶壳模在浇铸前须预热,浇铸钢铁材料为500℃,低熔点金属则为200℃,浇铸中或浇铸后,最好是于惰性气体中进行以防止氧化或脱碳之发生。 Ceramic shell mold of back brace mode can be used to dry mode, sand mould, carbon dioxide, mould, also can use permanent metal mould. Ceramic shell mould should be preheated before casting, casting iron and steel materials is 500 ℃, low melting point is 200 ℃, metal casting or casting, preferably in an inert gas to prevent the occurrence of oxidation and decarburization.
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