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Efficient molding core production method for water glass sand blowing hardening

A technology of water glass sand and air hardening, which is applied in the direction of cores, molds, and mold components, etc., can solve the problems of low mechanical properties of sand cores, easy overblowing, etc. The effect of poisonous and irritating odor

Inactive Publication Date: 2016-06-15
SHENYANG HYATON FOUNDRY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of high-efficiency core making method of water glass sand blowing hardening, aims to solve the problem of blowing CO in water glass sand in the prior art. 2 The problems of easy overblowing and low mechanical properties of the sand core in the hardening core making process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Adopt Suzhou Mingzhi Technology Co., Ltd. MLWA1 sample mechanism movement. The raw materials and proportions used in the core-making mixture are: paddock washed sand 1000g, Shenyang Huiyatong new water glass HYT-S-104, 30g, zirconium fumed silica 3g. Use the laboratory blade type sand mixer to mix the raw materials used to obtain the core sand mixture, put the core sand mixture into the sand shooting cylinder, and use compressed air to inject the core sand mixture into the standard " 8" type sample experimental mold cavity, the core box mold descends with the main cylinder, pushes the blowing plate to the top of the mold, the main cylinder rises, and presses the blowing plate tightly; start the blowing valve, and at 0.15Mpa, the CO 2 The gas is blown into the cavity of the sand core through the blowing plate, pulse blowing: each pulse, blowing for 3s, stopping for 5s, pulse three times; after the blowing is completed, immediately open the ventilation valve and close the...

Embodiment 2

[0026] Adopt Suzhou Mingzhi Technology Co., Ltd. MLWA1 sample mechanism movement. The raw materials and proportions used in the core-making mixture are: Dalin washed sand 1000g, Shenyang Huiyatong new water glass HYT-S-106, 20g, zirconium fumed silica 3g. Use the laboratory blade type sand mixer to mix the raw materials used to obtain the core sand mixture, put the core sand mixture into the sand shooting cylinder, and use compressed air to inject the core sand mixture into the standard " The cavity of the 8" sample experimental mold, the core box mold descends with the main cylinder, pushes the air blowing plate to the top of the mold, the main air cylinder rises, and presses the air blowing plate tightly; start the blowing valve, and at 0.1Mpa, the CO 2 The gas is blown into the cavity of the sand core through the blowing plate, and the blowing time is 24s; after the blowing is completed, immediately start the ventilation valve and close the CO 2 The gas pipeline connects t...

Embodiment 3

[0028]Adopt Suzhou Mingzhi Technology Co., Ltd. MLWA1 sample mechanism movement. The raw materials and proportions used in the core-making mixture are: Dalin washed sand 1000g, Shenyang Huiyatong new water glass HYT-S-101, 25g, and silica fume 4g. Use the laboratory blade type sand mixer to mix the raw materials used to obtain the core sand mixture, put the core sand mixture into the sand shooting cylinder, and use compressed air to inject the core sand mixture into the standard " The cavity of the 8" sample experimental mold, the core box mold descends with the main cylinder, pushes the air blowing plate to the top of the mold, the main air cylinder rises, and presses the air blowing plate tightly; start the blowing valve, and at 0.1Mpa, the CO 2 The gas is blown into the cavity of the sand core through the blowing plate, pulse blowing: each pulse, blowing for 3s, stopping for 5s, pulse three times; after the blowing is completed, immediately open the ventilation valve and cl...

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Abstract

The invention discloses a high-efficiency core-making method for blowing and hardening water glass sand. The original sand, water glass for casting and non-crystalline silicon oxide are mixed by a sand mixer to obtain a core sand mixture, and then the mold-making The core sand mixture is filled into the mold by a core shooter or manually, and the CO blowing is used to 2 CO 2 The gas is blown into the cavity of the mold for blowing hardening, the blowing pressure is 0.1-0.4Mpa, the blowing time is 5-200s, and CO blowing 2 After the gas is finished, replace the compressed air, blow the compressed air into the mold cavity, the blowing pressure is 0.1-0.4Mpa, blow the compressed air for 10-200s, and the mold is ejected after the blowing is completed. The present invention can solve the problem of water glass sand blowing CO 2 The overblowing problem of the method can be solved, and the added amount of water glass can be reduced by more than 50%, and the mechanical properties of the manufactured core can be significantly improved at the same time.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a high-efficiency method for making cores by blowing and hardening sodium silicate sand. Background technique [0002] At present, in foundry production, high-efficiency molding and core technologies mainly include: cold box resin sand core making, hot core box resin sand core making and resin coated sand core making. Cold box resin sand core needs to be hardened by blowing with amine gas. Amine gas is poisonous and has a pungent smell. It is a flammable and explosive dangerous product. It has certain risks in production, transportation, storage and use; Core box resin sand core making and resin coated sand core making, the mold needs to be heated to 180-300 ℃, high energy consumption, strong smell, and harsh working environment. The above-mentioned core-making technologies all need to use artificially synthesized organic resins as binders. The production process of artificiall...

Claims

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Application Information

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IPC IPC(8): B22C9/12B22C1/18
CPCB22C9/123B22C1/188
Inventor 尹德英金广明
Owner SHENYANG HYATON FOUNDRY MATERIAL
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