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Casting process method for improving casting sand grain morphology and improving sand mold strength

A process method and casting process technology, which is applied in the direction of casting molding equipment, cleaning/processing machinery of casting mold materials, casting molds, etc., and can solve the problems of decreased effective recycling rate of added amount, decreased sand mold collapsibility, and large solid waste discharge and other problems, to achieve the effect of improving utilization rate, improving stability and saving modeling cost

Pending Publication Date: 2020-03-24
王海江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of decreased effective recycling rate, large solid waste discharge, and decreased sand mold collapse caused by excessively high binder addition, the present invention proposes a casting process method that improves the shape of casting sand grains and increases the strength of the sand mold. It is characterized in that, comprising the following steps:

Method used

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  • Casting process method for improving casting sand grain morphology and improving sand mold strength
  • Casting process method for improving casting sand grain morphology and improving sand mold strength
  • Casting process method for improving casting sand grain morphology and improving sand mold strength

Examples

Experimental program
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Effect test

Embodiment 1

[0046] In the sand mixing process of clay sand casting and knuckle castings, clay sand is first added to the self-hardening sand mixing equipment - roller sand mixer, and then 0.1% of the total weight of nanometer is added according to the requirements of the clay sand sand mold. Silicon oxide is used as a reinforcing agent material, and the two are fully stirred and mixed, and then the adhesive and curing agent are added and fully mixed. The size of nano silicon dioxide is 1--10 nanometers. The adhesive and curing agent are consistent with those added in the existing molding sand technology, and the addition amount is the same as that in the existing molding sand technology.

[0047] Afterwards, the sand is discharged from the sand outlet of the sand mixer to the sand box for molding and compaction, and an overflow port and an air outlet are opened on the molding to facilitate exhaust. After a certain period of time, the self-hardening mold is removed and the mold is repaire...

Embodiment 2

[0049] In the sand mixing process of the furan resin sand casting buffer, the furan resin sand is first added to the blade type sand mixer, and then according to the requirements of the furan resin sand sand mold, 10% of the total weight of the nano-ceramic composite material is added as a reinforcing agent material, and the The two are fully stirred and mixed, and then the adhesive and curing agent are added and fully mixed. The size of the nano-ceramic composite material is 20--100 nanometers. The added amount of the adhesive and curing agent is the same as that of the existing molding sand process.

[0050] Afterwards, the sand is discharged from the sand outlet of the sand mixer to the sand box for molding and compaction, and an air outlet is opened on the molding to facilitate exhaust. After a certain period of time, the self-hardening mold is removed and the mold is repaired, and then it is completed through the traditional casting sand molding process of brushing paint...

Embodiment 3

[0052]In the sand mixing process of coated sand casting to produce zirconium corundum electric fused bricks, the coated sand is first added to the countercurrent sand mixer, and then according to the requirements of the coated sand sand mold, 2% of the total weight of nano-scale silicon micropowder is added as Reinforcing agent material, fully stir and mix the two, then add adhesive and curing agent, etc. and fully mix. The size of nano-scale silicon micropowder is 10--20 nanometers. Described bonding agent, curing agent, are the same as embodiment 1.

[0053] Afterwards, the sand is discharged from the sand outlet of the sand mixer to the sand box for molding and compaction, and an overflow port and an air outlet are opened on the molding to facilitate exhaust. Other processes are the same as in Example 1.

[0054] Main advantages of the present invention are in the following aspects:

[0055] 1. It greatly saves the molding cost, improves the strength and integrity of the...

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Abstract

The invention relates to a casting process method for improving casting sand grain morphology and improving sand mold strength. The casting process method comprises the steps: 1, preparing raw materials, wherein the raw materials comprise molding sands and a reinforcing agent; 2, adding the raw materials into foundry sand mixing equipment, wherein the sands are added firstly, and then, the reinforcing agent is added, the reinforcing agent being added in a powdery mode or a mode of concentrating the powders into liquid, and fully stirring and mixing the raw materials uniformly; 3, adding an adhesive and a curing agent, carrying out full and uniform mixing, then, carrying out molding and compacting in a sand box, and forming an overflow port and an air outlet hole in the sand mold; 4, carrying out drawing after self-hardening, and carrying out shape modification; and 5, carrying out coating brushing, box closing, hot air drying, pouring, shakeout and recycling. The method realizes sand mixing and molding production by utilizing reinforcing agent materials such as nanoscale refractory materials and by being compatible with a traditional foundry sand production line and equipment, andthe purpose of greatly improving the strength of the sand mold on the premise of not additionally increasing the resin adding amount is achieved.

Description

technical field [0001] The invention relates to the technical field of casting molding technology, in particular to a casting process method for improving the shape of casting sand grains and increasing the strength of sand molds by using nano-scale silicon micropowder or microsilicon powder material. Background technique [0002] The self-setting resin sand casting process is widely used in the foundry industry of our country. It is basically used in the production of towels and large-scale castings, and many small and medium-sized castings are also used. The bonding film formed by the resin and hardener on the surface of the sand grains and the bonding bridges formed between the sand grains, see figure 1 . The strength of molding sand depends on the adhesion of the bonding film to the surface of the sand grains, the state of the bonding film and the strength of the bonding bridge. In all current casting molding processes, the method to increase the strength of the sand m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C1/00B22C5/04
CPCB22C9/02B22C5/0409B22C1/00
Inventor 王海江唐盛来
Owner 王海江
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