Molding sand for hand molding and preparation method thereof

Abstract

Molding sand for hand molding is prepared from the following raw materials in parts by weight: 0.5-0.8 part of glycervl triacetate, 4-5 parts of phenolic resin, 0.8-1.1 parts of zinc oleate, 1-1.3 parts of zinc isoocatanoate, 2-2.4 parts of barium stearate, 2-3 parts of sodium humate, 20-25 parts of zinc oxide, 130-160 parts of clay, a proper amount of water, and 20-30 parts of an auxiliary agent. Through adopting the clay for sintering granulation, the molding sand has good air permeability and good dispersion and can be recycled; and with use of zinc oleate, barium stearate, sodium humate and zinc oxide, the molding sand is good in plasticity, and easy for hand molding.

Description

technical field [0001] The invention relates to the field of casting, in particular to a molding sand for manual 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] Good plasticity is required for manual molding sand, and general molding sand is not particularly hand-shaped. [0005] Therefore, the above shortcomings of molding sand need to be overcome. Contents of the invention [0006] The object of the present...

AI Technical Summary

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.