Aluminum alloy casting moulding sand and preparing method thereof

[0014] Example one:

[0015] The casting sand components include 20 parts by weight of quartz sand, 10 parts of Hao sand, 10 parts of corundum sand, 5 parts of graphite powder, 5 parts of bentonite, 5 parts of diatomaceous earth, 2 parts of hollow microbeads, 3 parts of glass fiber, 4 parts of clay, 2 parts of light calcined powder, 10 parts of furan resin, 2 parts of polypropylene fiber.

[0016] The preparation method of this embodiment includes the following steps:

[0017] A. Mix the quartz sand, Hao sand, corundum sand, and graphite powder and add them to the sand mixer to obtain a mixture A;

[0018] B. Preheat the mixture A, the preheating temperature is 50℃, the preheating time is 20min, then add bentonite, diatomaceous earth, clay, lightly burned powder, furan resin, mix and stir at high speed at 4000 rpm / Min, stirring time is 25min, to obtain mixture B;

[0019] C. Add hollow microbeads, glass fibers, and polypropylene fibers to the mixture B, fully stir and mix for 5 hours,

[0020] Embodiment two:

[0021] The casting sand components include 40 parts by weight of quartz sand, 20 parts of Hao sand, 30 parts of corundum sand, 10 parts of graphite powder, 15 parts of bentonite, 18 parts of diatomaceous earth, 6 parts of hollow microbeads, 6 parts of glass fiber, 12 parts of clay, 8 parts of light burnt powder, 18 parts of furan resin, 4 parts of polypropylene fiber.

[0022] The preparation method of this embodiment includes the following steps:

[0023] A. Mix the quartz sand, Hao sand, corundum sand, and graphite powder and add them to the sand mixer to obtain a mixture A;

[0024] B. Preheat the mixture A, the preheating temperature is 50℃, the preheating time is 20min, then add bentonite, diatomaceous earth, clay, lightly burned powder, furan resin, mix and stir at high speed at 4000 rpm / Min, stirring time is 25min, to obtain mixture B;

[0025] C. Add hollow microbeads, glass fibers, and polypropylene fibers to the mixture B, fully stir and mix for 5 ho

[0026] Embodiment three:

[0027] The casting sand components include 25 parts by weight of quartz sand, 12 parts of Hao sand, 15 parts of corundum sand, 6 parts of graphite powder, 6 parts of bentonite, 8 parts of diatomaceous earth, 3 parts of hollow microbeads, 4 parts of glass fiber, 6 parts of clay, 3 parts of light burnt powder, 12 parts of furan resin, 3 parts of polypropylene fiber.

[0028] The preparation method of this embodiment includes the following steps:

[0029] A. Mix the quartz sand, Hao sand, corundum sand, and graphite powder and add them to the sand mixer to obtain a mixture A;

[0030] B. Preheat the mixture A, the preheating temperature is 50℃, the preheating time is 20min, then add bentonite, diatomaceous earth, clay, lightly burned powder, furan resin, mix and stir at high speed at 4000 rpm / Min, stirring time is 25min, to obtain mixture B;

[0031] C. Add hollow microbeads, glass fibers, and polypropylene fibers to the mixture B, fully stir and mix for 5 hour