A kind of recyclable foundry sand with good gas permeability and preparation method thereof

A casting mold and air permeability technology, applied in casting molding equipment, casting molds, cores, etc., can solve the problems of poor use performance of recycled sand, poor recycling performance, easy to have pores in castings, etc., and achieve dimensional stability of castings The effect of good performance, good plasticity and high casting yield

Inactive Publication Date: 2016-07-06
HEFEI JAC CASTING
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AI Technical Summary

Problems solved by technology

At present, the recycling performance of the molding sand is not good, the recycled sand has poor usability, and the air permeability is not good, and the castings are prone to pores; what’s more, the dispersion is not good, the sand feels hard, and the mold is easy to break; some molding sands have good plasticity. , high wet strength, but many sand beans, poor collapsibility and other phenomena, need to be improved

Method used

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Examples

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Embodiment Construction

[0013] A recyclable casting sand with good air permeability is made of the following raw materials in parts by weight (kg): old sand 2300, new sand 90, bentonite 20, clay 110, furan resin 43, coal powder 18, polyalkylene glycol 4.5 , phosphoric acid 5.5, wood pulp slick oil 4, cationic starch 2.5, Artemisia gum 4, modified quartz sand 110, appropriate amount of water;

[0014] The modified quartz sand is made of the following raw materials in parts by weight (kg): quartz sand 95, stearic acid 1.5, liquid paraffin 4, graphene oxide 9, glass hollow microspheres 5, magnesium stearate 1.5, polyamide Wax powder 2.5, ricinoleic acid polyester 2.5, petrolatum 2.5; the preparation method is: send the quartz sand into the calciner, calcined and melted at 1900°C, crushed into particles with a particle size of 0.5-2mm, and added other remaining ingredients, Grinding for 35 minutes, that is.

[0015] The preparation method of the recyclable foundry sand with good gas permeability compris...

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Abstract

A recyclable casting sand with good air permeability is characterized in that it is made of the following raw materials in parts by weight: old sand 2280-2400, new sand 80-120, bentonite 16-24, clay 100-120, furan resin 40-45, coal Powder 16-20, polyalkylene glycol 4-5, phosphoric acid 5-6, wood pulp tall oil 3-5, cationic starch 2-3, Artemisia gum 3-5, modified quartz sand 100-120, water Appropriate amount; the present invention increases the air permeability of the molding sand by using clay and granulating, reduces the generation of casting pores, and can be recycled; by using modified quartz sand, the dispersibility, lubricity and plasticity of the molding sand are increased Good, the dimensional stability of the casting is good; the molding sand of the invention has high wet strength, good high-temperature collapsibility, easy recycling, high casting yield, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of casting, in particular to recyclable foundry sand with good air permeability and a preparation method thereof. Background technique [0002] Molding sand is a material used for molding in casting. Molding sand is generally made by mixing molding materials such as raw sand for casting, molding sand binder and auxiliary additives in a certain proportion, and natural silica sand containing clay can also be used. At present, the recycling performance of the molding sand is not good, the recycled sand has poor usability, and the air permeability is not good, and the castings are prone to pores; what’s more, the dispersion is not good, the sand feels hard, and the mold is easy to break; some molding sands have good plasticity. , High wet strength, but many sand beans, poor collapsibility and other phenomena, need to be improved. Contents of the invention [0003] The object of the present invention is to provide a ki...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00
Inventor 韦民黄光伟孙佳
Owner HEFEI JAC CASTING
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