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Strong shell casting process

A casting process and hard-type technology, applied in the field of hard-shell casting process, can solve the problems of carbon increase, poor labor environment, large sewage discharge, etc., and achieve the effects of light weight, weight reduction, and weight change

Inactive Publication Date: 2018-07-24
郭玉盼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing casting process includes sand casting process, precision casting production process and lost foam casting process. These casting processes all have the following defects: the sand casting process is a traditional casting process with poor working environment, large amount of sewage, and the casting products are prone to air hole clips Common casting defects such as slag and blisters; precision casting is difficult to produce castings over 100Kg, and the yield is low; the lost foam casting process increases carbon, and the residue has not been able to make low carbon steel and alloy steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] The hard shell casting process is as follows: step 1, use EPS raw materials for blow mold assembly; step 2, use specific repair materials to repair the surface of EPS; step 3, apply special grout, wherein the grout is composed of the following Mass fraction raw material composition: silica sol 15%, dextrin 3%, sulfate 6%, chromium trioxide 0.5%, lignocellulose 0.5%, fiber 0.5%, cooked bauxite 3.5%, 320 high alumina 50%, quartz powder 20%, syrup 0.3%, bentonite 0.4%, defoamer 0.2%, preservative 0.1%; then carry out drying treatment at 50 ℃, and the drying treatment process is repeated several times; step 4, the dried model Put it into a modified furnace and melt the EPS at 200°C-900°C; Step 5: After the shell is formed, it is cooled and buried in a sandbox, vibrated by a vibrating table, molten steel is smelted, connected to a negative pressure device, and controlled by negative pressure Casting is carried out at 0.08; step 6, heat preservation, cooling, unpacking, sand ...

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PUM

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Abstract

The invention discloses a strong shell casting process, and relates to the technical field of the casting industry. The process comprises specific steps that an EPS raw material is adopted to carry out mold blowing assembling; a specific repairing material is adopted to repair the surface of EPS; specific pasting is subject to smearing, drying treatment is carried out at 20 to 70 DEG C, and the drying process is repeated multiple times; a drying model is put into a refitting furnace, EPS is fused out at 200 to 900 DEG C; after a shell is formed, cooling is carried out, a sand box is embedded,compaction through a compaction table is achieved, molten steel is smelted, a negative pressure device is connected, the negative pressure is controlled to range from 0.02 to 0.08 for casting; heat preservation, cooling, box opening and sand recycling are carried out, and a gating and risering system is removed. The specific EPS raw material is adopted to mold blowing, the damage to a mold cavitydue to drawing can be removed, the EPS raw material is adopted to serve as the model, the weight is reduced, and the phenomenon that due to the fact that EPS makes contact with molten steel, gas generation and combustion happen, free carbon is generated and damages and pollutes the molten steel, and molten steel scrapping is caused is avoided.

Description

Technical field: [0001] The invention relates to a hard shell casting process, which belongs to the technical field of casting industry. Background technique: [0002] At present, the existing casting process includes sand casting process, precision casting production process and lost foam casting process. These casting processes all have the following defects: the sand casting process is a traditional casting process with poor working environment, large amount of sewage, and the casting products are prone to air hole clips Common casting defects such as slag and blisters; precision casting is difficult to produce castings over 100Kg, and the yield is low; the lost foam casting process increases carbon, and the residue has not been able to make low-carbon steel and alloy steel. Invention content: [0003] In view of the above-mentioned problems, the technical problem to be solved by the present invention is to provide a hard mold shell casting process. [0004] The tough ...

Claims

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Application Information

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IPC IPC(8): B22C1/00B22C3/00B22C13/08
CPCB22C1/00B22C3/00B22C13/085
Inventor 郭玉盼
Owner 郭玉盼