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Cast piece forming and solidifying method

A solidification method and casting molding technology, which is applied in the direction of casting molding equipment, casting molds, and casting mold components, and can solve problems such as rough product surfaces, large investment in equipment, and low precision

Inactive Publication Date: 2004-12-29
湖南黄金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The metal product replication process used in the existing foundry industry includes water glass sand investment casting, ceramic mold casting, powder metallurgy sintering casting, etc., but the product surface of water glass sand investment casting is rough, the precision is not high, sticky sand, scabbing, Coating thickness is difficult to control; the process of ceramic casting is not easy to control, high brittleness, easy to produce large cracks, high cost, and difficult to realize mechanized automatic production; powder metallurgy sintering casting equipment has large investment and high cost; there is no casting in the existing technology Molding and curing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: water glass sand investment casting

[0022] (1) prepare casting molding solidification liquid: crystalline magnesium chloride 30Kg, alum 2Kg, add water 100Kg and be made into the paste that the proportion that measures with hydrometer is 10 degree;

[0023] (2) 10Kg of the above solidification solution is mixed into 30Kg of heavy magnesium oxide and 60Kg of dry sand as raw and auxiliary materials; and stir into a paste;

[0024] (3) The paraffin model is rolled in the paste sand;

[0025] (4) Carry out procedures such as hardening, investment molding, and drying;

[0026] (5) Put the casting of casting molding into the furnace together with the mold for heat treatment;

[0027] (6) Clear sand.

[0028] The products casted by this method have high precision, and products with surface roughness of Ra1.6-3.2μm can be obtained. Non-ferrous alloys can be cast with fine patterns, and no further processing or less processing is required.

Embodiment 2

[0029] Embodiment 2: ceramic mold casting

[0030] (1) prepare casting molding solidification liquid, crystallization magnesium chloride 50Kg, alum 3Kg, add water 100Kg and be made into the paste that the specific gravity that measures with hydrometer is 40 °;

[0031] (2) the above casting molding solidification liquid is allocated to heavy magnesium oxide, and its weight ratio is: solidification liquid: heavy magnesium oxide=1: 7-12, and stir into paste;

[0032] (3) Master mold grouting;

[0033] (4) Vibration defoaming, hardening, mold removal, drying and other procedures;

[0034] (5) Put the casting of casting molding into the furnace together with the mold for heat treatment;

[0035] (6) Clear sand.

[0036] The products casted by this method have high precision, the forming process is easy to control, not limited by the complexity and weight of the product, the shape is simple, the cost of raw and auxiliary materials is low, and automatic and mechanized production ...

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PUM

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Abstract

The cast rod forming and hardening method is used in casting industry. The forming and hardening liquid is prepared with MgCl2 crystal, alum and other material, and the forming and hardening liquid may be further compounded into paste of 10-40 deg specific weight or added into material for casting. The said method has the advantages of simple molding, low cost, high product precision and roughness, no sand sticking, no scar, no limitation in product complication degree and weight, etc.

Description

technical field [0001] The invention relates to a method for forming and solidifying castings in the metal product replication process used in the foundry industry. Background technique [0002] The metal product replication process used in the existing foundry industry includes water glass sand investment casting, ceramic mold casting, powder metallurgy sintering casting, etc., but the product surface of water glass sand investment casting is rough, the precision is not high, sticky sand, scabbing, Coating thickness is difficult to control; the process of ceramic casting is not easy to control, high brittleness, easy to produce large cracks, high cost, and difficult to realize mechanized automatic production; powder metallurgy sintering casting equipment has large investment and high cost; there is no casting in the existing technology The method of molding and curing. Contents of the invention [0003] The purpose of the present invention is to provide a simple shape, l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/10B22C1/20B22C9/04
Inventor 秦中林
Owner 湖南黄金股份有限公司
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