Molding structure for green sand mold casting
A casting model and green sand technology, applied in casting molding equipment, casting molds, cores, etc., can solve the problems of large one-time investment and high cost of coated sand, and achieve high-strength effects
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[0015] Such as figure 1 As shown, a green sand casting molding structure includes an upper box type 1, a lower box type 2, a back sand 3 is placed at the bottom of the lower box type 2, and a casting model 4 is built in the middle between the upper box type 1 and the lower box type 2, The casting model 4 is covered with coated sand 5 around, and the upper part of the coated sand 5 in the upper box type 1 is provided with surface sand 6 . The thickness of the coated sand 5 is 3-4mm.
[0016] Molding sand material preparation:
[0017] (1) Back sand 3: The sand mixing process is the same as the traditional wet sand process.
[0018] (2) Surface sand 6: The sand mixing process is the same as the traditional wet sand process.
[0019] (3) Mixing coated sand 5: mix coated sand 5 with water and bentonite as binder.
[0020] Preparation method:
[0021] Add 8% bentonite and 4.5% water to the coated sand supplied in the market by weight (coated sand 87.5%), and mix coated sand 5 ...
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