Lost foam casting (LFC) method without roasting by using precise paraffin wax model sample and high-performance coating shell mould
A lost foam casting, high-performance technology, used in casting molding equipment, coatings, molds, etc., can solve the problem that the dimensional accuracy and surface finish of castings cannot be compared with wax mold castings, cumbersome and inefficient irritating harmful gases, castings problems such as low dimensional accuracy, to achieve the effect of ensuring strength, low cost, and stable casting quality
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[0017] The lost foam casting method adopting paraffin pattern and high-performance coating shell mold without baking comprises the following steps:
[0018] (1) Making paraffin patterns; the wax materials and manufacturing methods used in the manufacture of paraffin patterns are prior art;
[0019] (2) Preparation of paint: The paint is divided into two types: inner layer (1-2 layers) and outer layer (3-6 layers);
[0020] (3) Coating and drying: two layers of inner coating are dip-coated or shower-coated. After drying, the thickness of the inner layer (1-2 layers) is ≥0.6mm, and it is dried layer by layer. The temperature of the drying room is controlled at 30-33°C , the relative humidity of the air should be <40%; the outer layer (3-6 layers) coating is thick and thin composite refractory material, which can be dipped or showered, and dried layer by layer. The temperature is controlled at 30-33°C, and the relative air humidity is <40 %, there is no need to sprinkle dry sand...
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