Solid pattern casting special paint and preparation method thereof

A technology of real casting and coating, which is applied in casting molding equipment, coating, casting and other directions, can solve the problems of high manufacturing cost, black pollution of working environment, and inability to apply manual painting, so as to maintain integrity and prevent model deformation effect

Inactive Publication Date: 2011-05-11
DONGFENG MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The paint has high temperature resistance and is suitable for the production process of large castings, but its manufacturing cost is high, and it cannot be applied to manual painting. The paint is black, which may easily cause black pollution in the working environment

Method used

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  • Solid pattern casting special paint and preparation method thereof
  • Solid pattern casting special paint and preparation method thereof
  • Solid pattern casting special paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The mass percentage of each component of the special coating for full mold casting is: 35% of high alumina bauxite clinker, 25% of flake graphite powder, 2.8% of architectural emulsion, 3% of silica sol, 0.5% of sodium hexametaphosphate, iron oxide 2% red powder, 6% composition of bentonite powder and 2% CMC aqueous solution, 0.8% sodium methylene bis-naphthalene sulfonate, and 24.9% water.

[0027] Wherein, the mass ratio of bentonite powder to CMC aqueous solution is 1:3; the particle size gradation of the high alumina bauxite clinker is: 5-10% of the balance on the 200-mesh sieve, and 15-20% on the 250-mesh sieve; The particle size distribution of the flaky graphite powder is: 80% of the balance on the 200 mesh sieve.

Embodiment 2

[0029]The mass percentage content of each component of the special coating for full mold casting is: 30% of high alumina bauxite clinker, 30% of flake graphite powder, 2.7% of white latex, 4.5% of water glass, 0.5% of aluminum sulfate, and 1% of iron oxide red powder %, the composition of bentonite powder and 2% CMC aqueous solution with a mass fraction of 5%, polycarboxylate calcium calcium 1.3%, and water 25%.

[0030] Among them, the mass ratio of bentonite to CMC aqueous solution is 1:2; the particle size distribution of high alumina bauxite clinker is: 5-10% of the balance on the 200 mesh sieve, 20-25% of the balance on the 250 mesh sieve; The particle size gradation of graphite powder is: the balance on 200 mesh sieve is 70%.

Embodiment 3

[0032] The mass percentage of each component of the special coating for full mold casting is: 40% of high alumina bauxite clinker, 20% of flake graphite powder, 3.2% of water-soluble resin, 3.0% of silica sol, 0.5% of sodium hexametaphosphate, oxidation 2% of iron red powder, 6% of the composition of bentonite powder and 2% CMC aqueous solution with a mass fraction of 6%, 1.3% of sodium methylene bis-naphthalene sulfonate, and 24% of water.

[0033] Among them, the mass ratio of bentonite powder to CMC aqueous solution is 1:2.5; the particle size distribution of high alumina bauxite clinker is: 5-10% of the balance on the 200-mesh sieve, 15-20% on the 250-mesh sieve; The particle size gradation of the graphite powder is: the balance on the 200 mesh sieve is 75%.

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Abstract

The invention discloses a solid pattern casting special paint and a preparation method thereof. The mass percentages of various constituents in the paint are: 30-40% of bauxite chamotte, 20-30% of flaky graphite powder, 6.3-8.5% of bonder, 1-2% of iron oxide red powder, 4-6% of suspending agent, 0.8-1.5% of water reducing agent and 20-30% of water. The preparation method comprises the steps: mixing the various components of the solid pattern casting special paint according to the mass percentages and loading the constituents into a ball mill; adding 50-80 ceramic balls with a diameter of 30-50 mm into the ball mill; and mixing and stirring the materials evenly to obtain the paint. Practices show that the paint has strong abrasion performance, high adhesiveness, good air permeability and fast-dry performance both in low and high temperature environments; the paint can satisfy the production requirement of large casting production; the preparation method disclosed by the invention is simple; and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of full mold casting, and specifically refers to a special coating for full mold casting and a preparation method thereof. Background technique [0002] The solid mold casting technology is a casting method that uses polystyrene foam to make a pattern, paints and dries, and uses no-hardening resin sand to shape and pour the casting. In the no-bake resin sand full-mold casting process, coating is a key technology. Compared with ordinary coatings, full-mold casting coatings must bear the mechanical impact of resin sand during molding, and the erosion of molten metal and appearance during pouring. The pressure effect of the gas produced by gasification combustion. [0003] In the prior art, the Chinese patent No. 03134231.0 discloses a coating for negative compaction casting, the backbone material of which is 320 mesh zircon powder or 320 mesh bauxite or 320 mesh graphite; the binder is sodium phosphate or wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 马朝阳潘明波王相荣
Owner DONGFENG MOTOR CO LTD
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