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A method of applying paint to a mold

A coating and coating technology, applied in the direction of casting molds, casting mold components, casting molding equipment, etc., can solve problems such as ineffective coordination of coating composition design, unreasonable combination of aggregate and auxiliary components, and inability to exert the maximum effect of coatings, etc. Achieve the effects of preventing sand sticking, high applicability, and sufficient heat insulation

Active Publication Date: 2019-07-26
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems existing in the prior art that the paint coating method is single, the combination of aggregate and auxiliary components is unreasonable, the level is monotonous, the coating method and the paint composition design cannot be effectively coordinated, and the maximum effect of the paint cannot be exerted, etc., and proposes a A new method of coating coatings on molds. This method is based on the design of coating components, which is reasonable and efficient. Cooperating with the layer combination of coatings and the selection of auxiliary materials, it can exert the maximum effect of coatings and effectively prevent sand sticking, sand inclusions, protrusions, etc. of castings. defect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to the technical solution of the present invention, a method for coating a high-chromium steel casting casting sand mold with paint is provided.

[0020] Specifically: when pouring high-chromium cast steel parts, before pouring high-chromium cast steel molten metal, apply a primer on the surface of the sand mold, the primer is water-based, and then coat the surface of the primer after drying Apply 2 coats of outer paint, drying after each coat.

[0021] The primer is composed of the following components: 35 parts by weight of zircon powder, 16 parts by weight of titanium oxide, 19 parts by weight of silicon carbide, 20 parts by weight of kaolin, 6 parts by weight of water-soluble phenolic resin, 3 parts by weight of sodium tripolyphosphate, 10 parts by weight Calcium-based bentonite in parts by weight and carrier water in 25 parts by weight.

[0022] First add 25 parts by weight of carrier water to the stirring tank at one time, then add 6 parts by weight of ...

Embodiment 2

[0027] According to the technical solution of the present invention, a method for coating a high-chromium steel casting casting sand mold with paint is provided.

[0028] Specifically: when pouring high-chromium cast steel parts, before pouring high-chromium cast steel molten metal, apply 2 primers on the surface of the sand mold, the primer is water-based, and then coat the surface of the primer after drying Apply 2 coats of outer paint, drying after each coat.

[0029] The primer is composed of the following components: 32 parts by weight of zircon powder, 20 parts by weight of titanium oxide, 16 parts by weight of silicon carbide, 23 parts by weight of kaolin, 8 parts by weight of water-soluble phenolic resin, and 5 parts by weight of aluminum dihydrogen tripolyphosphate , 15 parts by weight of calcium-based bentonite, 35 parts by weight of carrier water.

[0030] First add 35 parts by weight of carrier water to the stirring tank at one time, then add 8 parts by weight of ...

Embodiment 3

[0035] The difference between this embodiment and Example 1 is that the surface of the sand mold is coated with 1 coat of primer and the surface of the sand mold is coated with 2 coats of primer. In the process of preparing the primer and the outer coating, When adding binding agent and suspending agent, add the antifoaming agent of 2 weight parts simultaneously, the preservative of 1 weight part, all the other are identical with embodiment 1, after unpacking, obtain outward appearance smooth, smooth equally, without sticking sand, pinch. For high chromium cast steel parts with defects such as sand and protrusions, the paint can be easily peeled off.

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PUM

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Abstract

A kind of method for coating coating to casting mould, when coating coating to casting mold, be coated with 1-2 road primers on the surface of described casting mold earlier, every coating primer all carries out drying treatment, and then on The surface of the primer coating is coated with more than one outer layer of paint, and each outer layer of paint is dried. The main component of the refractory aggregate contained in the outer layer of paint is different from the main component of the refractory aggregate contained in the primer. Through the improvement of the paint coating method and the coordination of the fire resistance level of the primer and outer paint, the paint can not only play a sufficient heat insulation effect, but also achieve good peeling after casting, and the performance can exert the maximum effect.

Description

technical field [0001] The invention relates to a casting process control method, in particular to a method for coating a casting mould. Background technique [0002] Coating a layer of paint on the working surface of the mold (including the core) can effectively prevent and reduce defects such as sand sticking and sand inclusions on the surface of the casting, reduce the surface roughness of the casting, and improve the surface quality of the casting. It can be said that the quality of the casting coating It is the most direct factor related to the dimensional accuracy of castings. There are many types of commonly used casting coatings, which can be basically divided into two categories according to different dilution carriers-water-based coatings and alcohol-based coatings. Water-based coatings refer to coatings dispersed in water as a dispersion medium, and alcohol-based coatings refer to coatings dispersed in alcohol as a dispersion medium. Water-based coatings are wide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/12B22C3/00
Inventor 孟繁华
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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