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Casting mold repair method

A technology for casting molds and repairing methods, which is applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of low strength and wear resistance, affecting the mold repair effect, mold service life, shrinkage cracks, etc., so as to improve the use of The effect of performance, low repair cost, and short repair cycle

Inactive Publication Date: 2018-04-27
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the repair method used for damaged casting molds is usually to fill and polish the worn surface and damaged parts with putty putty to complete the repair process. Because the hardness of the putty material is not high, and the putty putty is in the drying process There is shrinkage phenomenon in the middle, which leads to the local strength and wear resistance of the repaired mold is not high, and shrinkage cracks will also occur, which will affect the repair effect of the mold and the service life of the mold

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment one, to the repair of wooden foundry mould, concrete steps are as follows:

[0015] 1) Use a steel brush or manual electric grinding and polishing equipment to remove the dirt on the repaired part of the mold, and wipe it clean with alcohol;

[0016] 2) The maximum size of the part to be repaired is 6mm, and the surface repair material is directly used for coating and repair: the surface repair material is composed of epoxy resin, curing agent, toughening agent and wear-resistant powder with a particle size of 300 mesh, and the mass ratio It is 100:34:11:218, wherein the curing agent adopts modified polyamine, the toughening agent adopts dibutyl phthalate, and the wear-resistant powder is composed of silicon carbide powder with a weight ratio of 140 parts and 70 parts of alumina Powder mix composition.

[0017] 3) The repair layer of the cast mold after coating and repair is trimmed with manual electric grinding and polishing equipment, so that the size of t...

Embodiment 2

[0018] Embodiment two, to the repair of aluminum casting mould, concrete steps are as follows:

[0019] 1) Use a steel brush or manual electric grinding and polishing equipment to remove the dirt on the repaired part of the mold, and wipe it clean with alcohol;

[0020] 2) The maximum size of the part to be repaired is 18mm, and it is pre-filled with the back layer repair material: the composition of the back layer repair material is epoxy resin, curing agent, toughening agent and alkali-free glass fiber chopped strands, with a mass ratio of 100 :34:11:110, wherein the curing agent adopts modified polyamine, the toughening agent adopts dibutyl phthalate, and the specification of alkali-free glass fiber chopped strands is 6mm; when pre-filling, mix the above four raw materials Fill the repairing part of the casting mold with uniform back repair material, tamp it to make it flat, and reserve a 3mm depression from the mold surface as a repair space for filling the surface repair ...

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Abstract

The invention provides a method for repairing a casting mold, the steps of which are: 1) cleaning the parts to be repaired of the wooden, aluminum or steel casting molds to be repaired, and wiping them with alcohol; Choose a specific repair method for the size of the part: when the largest size of the part to be repaired is not less than 10mm, first pre-fill with the back layer repair material, and then coat the surface layer repair material after the back layer material is hardened; otherwise, directly Coating and repairing with surface repair materials; 3) Repairing the repairing layer of the casting mold after coating and repairing with manual electric grinding and polishing equipment, so that the size of the repairing layer meets the size requirements of the casting mold, and the surface of the repairing layer Grinding smooth and flat until the roughness is not less than 0.8Ra level, that is, the repair of the casting mold is completed. The invention has the advantages of simple process, low repair cost and short repair period, and is suitable for repair requirements of casting molds made of various materials such as wood, aluminum or steel.

Description

technical field [0001] The invention relates to a casting mold repair method, which belongs to the technical field of material processing engineering. Background technique [0002] The wooden, aluminum and steel casting molds used in the casting process will suffer from surface wear and partial damage of the mold after being used for a long time. At present, the repair method used for damaged casting molds is usually to fill and polish the worn surface and damaged parts with putty putty to complete the repair process. Because the hardness of the putty material is not high, and the putty putty is in the drying process There is shrinkage in the mold, which leads to low local strength and wear resistance of the repaired mold, and shrinkage cracks, which affect the repair effect of the mold and the service life of the mold. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for repairing casting molds of vario...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/18B22C9/06
Inventor 张勇
Owner SHANDONG UNIV OF TECH
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