COATING METHOD FOR CASTING MOLD

摘要

PURPOSE:To improve the quality of a product by painting electrostatically refractory particles to a shielding part of a pattern and coating a fixing agent to said member thereby forming a mold coating material layer. CONSTITUTION:An electrically conductive paint is coated on the surface of a pattern 1 and the shielding member 2 is formed by heating and sucking. The shielding member 2 is then coated on the surface by using zircon powder, etc. and using an electrostatic powder painting machine to form the mold coating material layer 6. The fixing agent is coated on the surface 6a of the layer 6 to fix the layer 6 and a flask body 7 is placed thereon. Silica sand 8 is packed in the flask and is oscillated at the same time. A shielding film 9 is put to the upper part and the inside of the part 8 packed with the silica sand is sucked and evacuated. The inside of a box 3 is pressurized at the same instant. The upper and lower casting molds are thus respectively manufactured. A molten metal is poured into the mold. The generation of gas from the mold coating material and the cracking, etc. of the layer 6 are obviated and the quality of the product is improved.