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Foundry water-soluble composite salt core material, salt core preparation method and prepared salt core

A water-soluble composite and water-soluble technology, applied in casting molding equipment, casting molds, cores, etc., can solve the problems of low core heat resistance, complex manufacturing process, low utilization rate, etc., and achieve low production cost, The effect of low energy consumption and low price

Active Publication Date: 2010-10-27
湖南江滨机器(集团)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are that the manufacturing process is complicated, the heat resistance of the core is not high, the strength is low, and the salt core is easy to be brittle when it is solidified and formed, the forming performance is poor, and the utilization rate is not high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] NaCl and talcum powder are first dried at 100°C±5°C, and 55kg NaCl, 120mlNa 2 SiO 3 12H 2 0 and 120g of talcum powder are put into a mixer and stirred. After they are mixed with each other, they are quantitatively put into metal molds at room temperature, pressurized, taken out and turned into shapes. In the sintering furnace, set the temperature at 680°C. Sinter for about 10 hours to obtain a salt core. The volume shrinkage of the salt core is about 11.74%, the tensile strength reaches 43MPa, and the collapse time is not more than 29min.

Embodiment 2

[0032] CaCl 2 and talcum powder are first dried at 100°C±5°C, and 55kg of CaCl 2 , 150ml (NH 4 ) 2 SiO 3 12H 2 O, 130g talcum powder is put into the mixer and stirs. After they are contained and mixed with each other, they are quantitatively put into a metal mold at room temperature, pressurized, taken out, turned and shaped, and sintered in a sintering furnace at a set temperature of 680°C for about 10 hours to obtain a salt core. The volume shrinkage rate is 11.18%, the tensile strength reaches 48MPa, and the collapse time is not more than 32min.

Embodiment 3

[0034] KCl and talcum powder are dried at 100°C±5°C, and 55kg KCl, 150mlK 2 SiO3 12H 2 O, 140g talc powder is put into the mixer and stirred, after it is contained and mixed with each other, under room temperature, it is quantitatively put into the metal mold, pressurized and pressed, taken out and turned into shape, in the sintering furnace, set the temperature at 680 ℃, sintering for about 10h, the volume shrinkage rate of the salt core is 10.89%, the tensile strength reaches 52MPa, and the collapse time is not more than 37min.

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Abstract

The invention relates to a foundry water-soluble composite salt core material, a salt core preparation method and a prepared salt core. The foundry water-soluble composite salt core material consists of 45 to 55 kilograms of water-soluble metal arsoniumsalt, 150 to 250 ml of bonding material and 120 to 250 grams of reinforcing agent, wherein the reinforcing agent may be kaolinite or talcpowder. The foundry water-soluble composite salt core material is prepared by mixing-molding and sintering the water-soluble metal arsoniumsalt, the bonding material and the reinforcing agent. The salt core material has low cost and production cost, high strength and low body shrinkage.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a water-soluble composite salt core for casting. Background technique [0002] The application of salt core in casting technology is to place a water-soluble salt core inside the mold cavity, inject liquid metal into the cavity, and the salt core solidifies in the cavity with the alloy melt. The inner salt core of the casting is washed away to form an inner annular cavity, and the casting with the inner annular cavity completes casting. [0003] Chinese patent document CN1792600 has introduced the water-soluble salt core manufacturing technology of injection molding. It is a core material made of water-soluble inorganic salt as the matrix, thermosetting resin as the binder, and other auxiliary reagents. During the manufacturing process of this technology, it includes baking, grinding and mixing, and the forming is completed below 200°C. [0004] Chinese patent document CN13653...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C9/10
Inventor 易绿林金铭刘利国何德生
Owner 湖南江滨机器(集团)有限责任公司
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