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Resin sand regeneration and surface treatment method

A technology for surface treatment and resin sand, applied in the field of resin sand regeneration surface treatment, can solve the problems of uneven regenerated resin wrapping, heavy workload, low quality of regenerated resin, etc. uniform effect

Inactive Publication Date: 2020-12-29
南京辉腾机械铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a large workload, the regenerated resin is not evenly wrapped, and the quality of the regenerated resin obtained is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for surface treatment of resin sand regeneration, the steps are:

[0017] (1) Collect the used resin sand in the storage tank, place it for 2 days, put it into the vibrating crusher, vibrate and crush it, and then sieve it to leave the resin sand with uniform particle size; screen the mixed resin sand, Use the iron remover to remove the iron filings in the mixed resin sand to obtain pure resin sand;

[0018] (2) Put the pure resin sand into the pneumatic dispersing device, which uses high-pressure gas to blow the resin sand from bottom to top, making the resin sand toss in the cavity of the device with the air flow. In the process, The liquid paraffin is atomized and sprayed in the cavity of the device, the temperature of the atomized paraffin is between 50-55°C, the resin sand particles are in full contact with the atomized paraffin wax, and a paraffin layer is formed on the surface of the resin sand particles, thereby Resin sand particles wrapped in paraffin...

Embodiment 2

[0021] A method for surface treatment of resin sand regeneration, the steps are:

[0022] (1) Collect the used resin sand in the storage tank, place it for 2 days, put it into the vibrating crusher, vibrate and crush it, and then sieve it to leave the resin sand with uniform particle size; screen the mixed resin sand, Use the iron remover to remove the iron filings in the mixed resin sand to obtain pure resin sand;

[0023] (2) Put the pure resin sand into the pneumatic dispersing device. The device uses high-pressure gas to blow the resin sand from bottom to top, so that the resin sand in the cavity of the device will roll with the air flow. The high-pressure gas is nitrogen. The temperature is lower than the paraffin temperature, not lower than 40°C; during this process, the liquid paraffin is atomized and sprayed in the cavity of the device, the temperature of the atomized paraffin is between 50-55°C, the resin sand particles and the mist The melted paraffin wax is fully c...

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PUM

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Abstract

The invention provides a resin sand regeneration and surface treatment method. The method comprises the following steps: collecting used resin sand in a storage tank, standing for 2 days, adding the resin sand into a vibration crusher, carrying out vibration crushing, and conducting sieving to leave resin sand with a uniform particle size; sieving mixed resin sand, and removing scrap iron in the mixed resin sand, thereby obtaining pure resin sand; putting the pure resin sand into a pneumatic scattering device, turning over the resin sand in an accommodating cavity in the device along with airflow, atomizing and spraying liquid paraffin into the accommodating cavity in the device, enabling resin sand particles to be in full contact with the atomized paraffin, and forming a paraffin layer onthe surfaces of the resin sand particles, thereby obtaining the paraffin-coated resin sand particles. The paraffin is used for wrapping the resin sand particles, then the surfaces of the treated resin sand particles are wrapped with resin through the prior art, the uniform distribution effect of the resin can be better, and the obtained regenerated resin sand is high in quality, uniform in particle size and good in resin regeneration wrapping uniformity.

Description

technical field [0001] The invention relates to the technical field of resin sand regeneration, in particular to a resin sand regeneration surface treatment method. Background technique [0002] Resin sand refers to molding sand or core sand that uses synthetic resin as a binder for sand grains. After the mold or core is made of resin sand, the resin undergoes an irreversible crosslinking reaction and solidifies through the action of the curing (hardening) agent, thus giving the mold or core the necessary strength. [0003] Resin sand is widely used as mold (core) sand in modern foundry production. Molding (core) sand with resin as binder mainly includes thermal method coated resin sand, hot box resin sand, cold box resin sand, furan resin sand, I furan resin no-bake sand, etc. Resin sand has high strength after hardening, especially suitable for machine modeling, and can produce complex and thin-walled castings. [0004] In the foundry industry, resin sand is one of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C5/00B22C5/04B22C5/06
CPCB22C5/00B22C5/04B22C5/06
Inventor 陈叶辉高红头张锁头夏强国
Owner 南京辉腾机械铸造有限公司