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Cooling process for foundry waste sand

A cooling process and casting waste sand technology, which is applied in the direction of manufacturing tools, casting molding equipment, cleaning/processing machinery of casting mold materials, etc., can solve the problems of slow cooling speed of castings, difficult control, difficult sequence solidification, etc., to achieve Good cooling effect, avoid shrinkage cavity defects, and high heat exchange rate

Inactive Publication Date: 2016-12-14
TIANJIN ZHONGDA PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional cooling system for molding sand treatment has complex equipment structure, high cost and slow cooling speed of castings, and is not easy to control, difficult to achieve sequential solidification, and prone to shrinkage defects. A cooling device with simple structure, convenient installation and use, low energy consumption, high heat exchange rate and good cooling effect is necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A cooling process for foundry waste sand is characterized in that the specific steps of the method used are as follows:

[0016] (1) Put the hot sand from the drying process into the cooling device with stirring function through the sand inlet for tumbling and stirring. The capacity of the mixing drum is 15L, and the speed of the mixing drum is 50r / min;

[0017] (2) At the same time, turn on the water-cooling spraying device of the water-cooling system on the top of the mixing drum and the centrifugal fan of the air-cooling system at the sand inlet. min, the water spray speed is controlled by the flow meter, and the wind speed is 16m / s;

[0018] (3) Collect the cooling water produced by step (2) in the sump at the bottom of the cooling device, and circulate the cooling water into the cooling water pool through the pipeline pump, thereby realizing the recycling of cooling water, the working parameters of the pipeline pump, Among them, the working voltage is 220V, the fr...

Embodiment 2

[0021] A cooling process for foundry waste sand is characterized in that the specific steps of the method used are as follows:

[0022] (1) Put the hot sand from the drying process into the cooling device with stirring function through the sand inlet for tumbling and stirring. The capacity of the mixing drum is 15L, and the speed of the mixing drum is 80r / min;

[0023] (2) At the same time, turn on the water-cooling spraying device of the water-cooling system on the top of the mixing drum and the centrifugal fan of the air-cooling system at the sand inlet. min, the water spray speed is controlled by the flow meter, and the wind speed is 25m / s;

[0024] (3) Collect the cooling water produced by step (2) in the sump at the bottom of the cooling device, and circulate the cooling water into the cooling water pool through the pipeline pump, thereby realizing the recycling of cooling water. The working parameters of the pipeline pump, Among them, the working voltage is 220V, the fr...

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Abstract

The invention provides a cooling process for foundry waste sand. The cooling process includes the following steps that hot sand coming from the drying procedure enters a cooling device with a stirring function through a sand inlet so as to be rolled and stirred; at the same time, a water-cooling spray device of a water cooling system on the top of a stirring barrel and a centrifugal fan of an air cooling system at the position of the sand inlet are started; cooling water generated through the steps mentioned above is collected in a water collection tank at the bottom of the cooling device and is circulated into a cooling pool through a pipeline pump; and the cooled sand enters the next procedure through a sand outlet after passing through a screening device. The cooling process is simple in structure, convenient to install and use and low in energy consumption, the water cooling system and the air cooling system exchange heat with materials at the same time, the heat exchange rate is high, the cooling effect is good, the dust removal and impurity removal effects are further achieved by additionally arranging the air cooling system, the cooling speed is easy to control, progressive solidification is achieved, the defect of shrinkage cavities is avoided, and the cooling process is widely applied to medium and small foundry enterprises.

Description

technical field [0001] The invention relates to the technical field of casting cooling technology, in particular to a cooling technology of casting waste sand. Background technique [0002] The traditional cooling system for molding sand treatment has complex equipment structure, high cost and slow cooling speed of castings, and is not easy to control, difficult to achieve sequential solidification, and prone to shrinkage defects. A cooling device with simple structure, convenient installation and use, low energy consumption, high heat exchange rate and good cooling effect is necessary. Contents of the invention [0003] The invention aims to solve the deficiencies of the prior art, and provides a cooling process for foundry waste sand. [0004] In order to achieve the above object, the present invention adopts the following technical scheme: a cooling process for foundry waste sand, which is characterized in that the specific steps of the method used are as follows: [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C5/08
CPCB22C5/08
Inventor 孙士俊
Owner TIANJIN ZHONGDA PRECISION MACHINERY
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