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Multifunctional coating for casting and preparation method thereof

A multi-functional coating technology, applied in casting molding equipment, coatings, casting molds, etc., can solve the problems of no coating drying characteristics, adhesion and wear resistance, gas permeability exploration, unavoidable single use, and less research on coatings, etc. , to achieve the effect of stable process, fast drying speed and high air permeability

Active Publication Date: 2019-12-31
柳州市一乐科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, these two processes have basically the same requirements for coating properties, that is, high wear resistance, quick drying, high air permeability and high adhesion, which are also the most easily overlooked points in the coating research process, so until now There are few researches on coatings that can be used for both processes at the same time, which has become a current difficulty and a hot spot in the future
The Chinese patent authorization announcement number is CN102836950B, a patent document named a lost foam coating and its preparation method, which discloses a method of using high alumina bauxite clinker, quartz powder, flaky graphite, sodium bentonite, etc. as raw materials to prepare lost foam coatings. The method of mold coating solves the problem of coating air permeability and adhesion to a certain extent, but it can only be used in the lost foam process, and the use is inevitably single
Chinese patent authorization announcement number is CN102527928B, the patent literature that is called as a kind of alcohol-based coating for V-method casting and its preparation method. Can be used for V method casting
Although the Chinese Patent Publication No. CN105499481A, the patent document titled Novel Porcelain Coating for Casting Technology, mentions that the prepared magnetized coating can be used for the above two new types of technology, but for the two types of lost foam casting and V method casting There are still big differences in the raw material composition and ratio of the coatings used in the process, and it is not true that one coating is used in two processes, and there is no in-depth exploration of the drying characteristics, adhesion, wear resistance, and air permeability of the coatings. Unsatisfactory in practice

Method used

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  • Multifunctional coating for casting and preparation method thereof
  • Multifunctional coating for casting and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] A multifunctional coating for casting, comprising at least the following raw materials by weight: 51 parts of quartz sand powder, 5.5 parts of flake graphite powder, 4 parts of bentonite, 3 parts of zircon powder, 1 part of polystyrene, and 1 part of bauxite , 4 parts of calcium fluoride, 11 parts of plaster of paris, 2 parts of artemisia wax, 3 parts of trehalose and 6 parts of zinc oxide whiskers.

[0036] Among them, the particle size of the quartz sand powder is 150 mesh.

[0037] The preparation method of above-mentioned casting multifunctional coating, comprises the following steps:

[0038] a. Preparation of polystyrene melt: Take polystyrene according to the weight ratio, add water according to the ratio of material to liquid 1:3.5, heat at 110°C to melt the polystyrene, and then stir evenly to obtain a polystyrene melt ; The polystyrene melt is continuously kept warm at 110° C. to maintain a molten state;

[0039] b. Firing treatment: Take flake graphite powd...

Embodiment 2

[0046] A multifunctional coating for casting, comprising at least the following raw materials in parts by weight: 72 parts of quartz sand powder, 14.5 parts of flake graphite powder, 14 parts of bentonite, 15 parts of zircon powder, 11 parts of polystyrene, and 9 parts of bauxite , 15 parts of calcium fluoride, 25 parts of plaster powder, 7 parts of artemisia wax, 7 parts of trehalose and 20 parts of zinc oxide whiskers.

[0047] Among them, the particle size of the quartz sand powder is 250 mesh.

[0048] The preparation method of above-mentioned casting multifunctional coating, comprises the following steps:

[0049] a. Preparation of polystyrene melt: Take polystyrene according to the weight ratio, add water according to the material-to-liquid ratio of 1:5.5, heat at 130°C to melt the polystyrene, and then stir evenly to obtain a polystyrene melt ; The polystyrene melt is continuously kept warm at 130°C to maintain a molten state;

[0050] b. Firing treatment: Take flake ...

Embodiment 3

[0057] A multifunctional coating for casting, comprising at least the following raw materials in parts by weight: 60 parts of quartz sand powder, 8 parts of flake graphite powder, 8 parts of bentonite, 3-15 parts of zircon powder, 1-11 parts of polystyrene, aluminum 3 parts of bauxite, 5 parts of calcium fluoride, 14.5 parts of plaster of paris, 3 parts of artemisia wax, 4 parts of trehalose and 9.5 parts of zinc oxide whiskers.

[0058] Among them, the particle size of the quartz sand powder is 170 mesh.

[0059] The preparation method of above-mentioned casting multifunctional coating, comprises the following steps:

[0060] a. Preparation of polystyrene melt: Take polystyrene according to the weight ratio, add water according to the ratio of material to liquid 1:4, heat at 115°C to melt the polystyrene, and then stir evenly to obtain a polystyrene melt ; The polystyrene melt is continuously kept warm at 115° C. to maintain a molten state;

[0061] b. Firing treatment: tak...

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Abstract

The invention provides a multifunctional coating for casting and a preparation method thereof and particularly relates to the technical field of casting coatings. The method comprises the steps that firstly, a polystyrene fused solution is adopted for firing a compound, quartz sand powder and bentonite wrap the compound in batch in sequence, a wrapping compound is prepared, then powder of plasterof paris, sweet wormwood herb wax, trehalose and zinc oxide crystal whiskers are added to the wrapping compound, and the multifunctional coating for casting is prepared. The coating can be simultaneously used for two processes of lost foam casting and V-method casting, after coating is completed, cracks, bubbles and wrinkles do not exist, and the multifunctional coating for casting has the advantages of being resistant to wear, high in drying speed, adhesive force and air permeability and the like. The sand burning, shrinkage porosity and pore defects of a casting can also effectively prevented. The other aim of the invention is to provide the preparation method of the multifunctional coating for casting. The method is easy to operate, stable in process and suitable for large-scale production, and parameters can be controlled.

Description

【Technical field】 [0001] The invention relates to the technical field of casting coatings, in particular to a multifunctional coating for casting and a preparation method thereof. 【Background technique】 [0002] Foundry coating is one of the most important casting raw and auxiliary materials, which plays a key role in ensuring the surface quality of castings. With the continuous innovation and development of the foundry industry, new technologies such as lost foam casting and V method casting, which are different from traditional sand casting, have emerged. In terms of the nature of the coating, these two new processes are different from sand casting. Sand casting is to attach the coating to the sand mold and sand core. It is required that the coating should not have too much air permeability to prevent the core The generated gas enters the molten iron and affects the product quality; while the new technology is to attach the paint to the plastic model or plastic film, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00B22C9/03B22C9/04
CPCB22C3/00B22C9/03B22C9/04
Inventor 杜厚枢覃诱硬杜勇卫
Owner 柳州市一乐科技有限公司
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