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當前位置:陶殼模法系以硅酸膠溶體為結合劑介紹
[來源:www.voipblast.net] [作者:精密鑄造] [日期:17-02-10]
陶殼模法系以硅酸膠溶體為結合劑,混合耐火材料粉末填充劑及膠凝體化促。 Ceramic shell mould law with silica gel solution as binder, mixed refractory filler powder and gel to promote. 進劑,作成漿體。將有充分流動性的漿體澆覆于模型表面,待漿體凝結,后脫模,以700℃脫水,干燥,以1000℃燒成以提高強度,做成陶殼模。陶殼模的厚度為3~20mm,澆注大型鑄件時,其背面須襯墊,以托撐材料以承體金屬熔液之重量。 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. 模型材料在量少時使用表面處理過的材料,大量生產時使用金屬或樹脂,填充劑使用高純度、高熔點的耐火材料以防止與熔融金屬產生反應,其材質依澆鑄金屬的種類而定,耐火材料的粒度分布是大粒子混以小粒子粉粒,可獲得適度的強度與表面度,膠凝體化促進劑使用的目的在于加速結合劑的固化,一般使用堿性物如碳酸銨等。調整填充劑與結合劑之重量百分比,可控制漿體之流動性,陶殼模之強度與透氣性。填充劑之使用量使泡成漿體之體積為結劑體積的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. 陶殼模之背托撐??梢允褂酶稍锬?、油砂模、二氧化碳模,也可以使用永久性的金屬模。陶殼模在澆鑄前須預熱,澆鑄鋼鐵材料為500℃,低熔點金屬則為200℃,澆鑄中或澆鑄后,最好是于惰性氣體中進行以防止氧化或脫碳之發生。 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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