Molding sand for automatic molding and preparation method thereof
A kind of molding sand and automatic technology, applied in casting molding equipment, molds, cores, etc., can solve the problems of poor collapsibility, porosity in castings, high defective rate, improve plasticity and high temperature collapsibility, increase thermal conductivity and strength , the effect of preventing adhesion
Inactive Publication Date: 2015-04-08
MAANSHAN HENGDA WEAR RESISTANT MATERIALS
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Problems solved by technology
[0002] At present, there is a problem that the particle size of the molding sand is difficult to control. If the particle size of the molding sand is too large, although the air permeability is good, the surface of the casting is rough and the finish is not good; porosity
[0003] Traditional clay molding sand has many advantages, but it has the disadvantages of being difficult to recycle, poor air permeability, poor fluidity, poor dispersibility, poor collapsibility, poor heat dissipation, and serious environmental pollution.
[0004] Automatic molding sand needs to have high air permeability and good heat dissipation. It is difficult for ordinary molding sand to meet this requirement, or the rate of defective products is high
Method used
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Embodiment Construction
[0016] A molding sand for automatic molding, made of the following raw materials in parts by weight (kg): sodium bentonite 8, iron concentrate powder 33, clay 110, paper pulp 14, nano barium sulfate 13, coal powder 2.3, α-cyclodextrin 0.2, β-cyclodextrin 0.2, γ-cyclodextrin 0.2, hard clay 75, water amount, additive 25;
[0017] The additive is made of the following raw materials in parts by weight (kg): 17 parts by weight of quartz sand, 2.5 parts of iron oxide, 4 parts of aluminum oxide, 1.3 parts of calcium oxide, 3.5 parts of talc, 0.7 parts of rice husk ash, 1.8 parts of graphite powder, 0.9 parts of furfuryl alcohol resin, and benzenesulfonate Acid 0.6, water 2; the preparation method is: mix quartz sand, iron oxide, aluminum oxide, calcium oxide, and talc, perform ball milling, pass through a 150-mesh sieve, and burn into particles by flame melting method, with a particle size of 0.1-2mm; Mix rice husk ash, graphite powder, furfuryl alcohol resin, and water evenly, a...
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Abstract
Molding sand for automatic molding is prepared from the following raw materials in parts by weight: 7-10 parts of sodium bentonite, 30-35 parts of iron concentrate powder, 100-120 parts of clay, 13-15 parts of paper pulp, 10-15 parts of nanometer barium sulfate, 2-2.5 parts of coal powder, 0.2-0.3 part of alpha-cyclodextrin, 0.2-0.3 part of beta-cyclodextrin, 0.2-0.3 part of gamma-cyclodextrin, 70-80 parts of hard potter's clay, proper amount of water, and 20-30 parts of an auxiliary agent. By using clay for sintering granulation, the molding sand is good in air permeability, good in dispersity and recyclable; by using iron concrete powder and nanometer barium sulfate, the heat conductivity and the strength of the clay particle are increased; and by using sodium bentonite, paper pulp, alpha-cyclodextrin, beta-cyclodextrin and gamma-cyclodextrin, the molding sand is relatively strong in fluidity and relatively strong in adhesion degree, and is suitable for automatic molding line production.
Description
technical field [0001] The invention relates to the field of casting, in particular to a molding sand for automatic molding and a preparation method thereof. Background technique [0002] At present, there is a problem that the particle size of the molding sand is difficult to control. If the particle size of the molding sand is too large, although the air permeability is good, the surface of the casting is rough and the finish is not good; Stomata are produced. [0003] Traditional clay molding sand has many advantages, but it has the disadvantages of being difficult to recycle, poor air permeability, poor fluidity, poor dispersibility, poor collapsibility, poor heat dissipation, and serious environmental pollution. [0004] Automatic molding sand needs to have high air permeability and good heat dissipation. Ordinary molding sand is difficult to meet this requirement, or the rate of defective products is high. [0005] Therefore, the above shortcomings of molding sand ne...
Claims
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IPC IPC(8): B22C1/00B22C1/02
CPCB22C1/00B22C1/02
Inventor张在武
OwnerMAANSHAN HENGDA WEAR RESISTANT MATERIALS