Precoated sand accelerating casting part forming and preparation method thereof
A technology for castings and coated sand, which is used in foundry molding equipment, casting molds, metal processing equipment, etc. The effect of forming speed
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Embodiment 1
[0025] Coated sand to speed up the forming of castings, prepared from the following components:
[0026] Silica sand, ceramsite sand, magnetite sand, thermoplastic phenolic resin, modified polyester resin, hexamethylenetetramine, ammonium acetate, calcium stearate, ceramic glaze powder, ammonium stearate and molding agent;
[0027] The modified polyester resin is prepared by using polyester resin to be processed by intermediate frequency microwave for 4 minutes, and then centrifuged with a centrifuge for 25 seconds;
[0028] The molding agent is prepared from: epoxy resin, paraffin, polyethylene, metal powder, high temperature resistant additives, and toughening additives;
[0029] The metal powder used in the above-mentioned molding agent is composed of iron powder, chromium carbide powder and tungsten carbide powder, and the mixing ratio is 2:1:1;
[0030] The coated sand for accelerating the molding speed of castings is prepared from the following components in parts by ma...
Embodiment 2
[0040] Coated sand to speed up the forming of castings, prepared from the following components:
[0041] Silica sand, ceramsite sand, magnetite sand, thermoplastic phenolic resin, modified polyester resin, hexamethylenetetramine, ammonium acetate, calcium stearate, ceramic glaze powder, ammonium stearate and molding agent;
[0042] The modified polyester resin is prepared by using polyester resin to be processed by intermediate frequency microwave for 2-5 minutes, and then centrifuged with a centrifuge for 20-30 seconds;
[0043] The molding agent is prepared from: epoxy resin, paraffin, polyethylene, metal powder, high temperature resistant additives, and toughening additives;
[0044] The metal powder used in the above-mentioned molding agent is composed of iron powder, chromium carbide powder and tungsten carbide powder, and the mixing ratio is 2:1:1;
[0045] The coated sand for accelerating the molding speed of castings is prepared from the following components in parts ...
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