Molding sand for casting nonferrous alloys
A technology for non-ferrous alloys and molding sand, which is used in foundry molding equipment, molds, and machinery for cleaning/processing mold materials, etc. Improved smoothness and gloss, suitable breathability, and improved productivity
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Embodiment 1
[0020] A molding sand for casting non-ferrous alloys, which is made of the following raw materials in parts by weight: old sand 62, new sand 16, bentonite 6, sepiolite 3, talcum powder 2.1, titanium dioxide 1.2, soybean meal 5.
[0021] Described soybean meal, fat content is 12%.
[0022] A method for preparing molding sand for casting non-ferrous alloys, comprising the following steps:
[0023] (1) The old sand is sieved and mixed with new sand. The aperture is 200 mesh. After sieving, keep the sieve, and the proportion of old sand is reduced. First, sieve the old sand to remove the ash and particles in the old sand, and improve the air permeability of the old sand. It can quickly cool the high-temperature metal liquid, avoid ash and particles from adhering to the metal liquid, and improve the smoothness and gloss of non-ferrous alloys. Stir at 84 rpm for 20 minutes, and then at 145 rpm for 10 minutes to obtain the initial mixed sand;
Embodiment 2
[0030] A molding sand for casting non-ferrous alloys, which is made of the following raw materials in parts by weight: old sand 63, new sand 17, bentonite 7, sepiolite 4, talcum powder 2.2, titanium dioxide 1.3, soybean meal 6.
[0031] Described soybean meal, fat content is 13%.
[0032] A method for preparing molding sand for casting non-ferrous alloys, comprising the following steps:
[0033] (1) The old sand is sieved and mixed with new sand, the aperture is 220 mesh, the sieve is retained after sieving, the proportion of old sand is reduced, the old sand is sieved first, the ash and particles in the old sand are removed, and the air permeability of the old sand is improved It can quickly cool the high-temperature metal liquid, avoid ash and particles from adhering to the metal liquid, and improve the smoothness and gloss of non-ferrous alloys. Stir at 85 rpm for 23 minutes, and then at 148 rpm for 13 minutes. mixed sand;
[0034] (2) Add bentonite, talc powder and titan...
Embodiment 3
[0040] A molding sand for casting non-ferrous alloys, which is made of the following raw materials in parts by weight: old sand 64, new sand 18, bentonite 8, sepiolite 5, talcum powder 2.3, titanium dioxide 1.4, soybean meal 7.
[0041] Described soybean meal, fat content is 14%.
[0042] A method for preparing molding sand for casting non-ferrous alloys, comprising the following steps:
[0043] (1) After the old sand is sieved, it is mixed with new sand. The aperture is 240 mesh. After sieving, keep the sieve material, and the proportion of old sand is reduced. First, sieve the old sand to remove the ash and particles in the old sand, and improve the ventilation of the old sand. It can quickly cool the high-temperature metal liquid, avoid ash and particles from adhering to the metal liquid, and improve the smoothness and gloss of non-ferrous alloys. Stir at 86 rpm for 25 minutes, and then at 150 rpm for 15 minutes. mixed sand;
[0044] (2) Add bentonite, talc powder and titan...
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