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Formula of high-efficiency quenched moulding sand

A technology of chilling and molding sand, applied in the directions of casting molds, cores, casting molding equipment, etc., can solve the problems of complex shapes, increased scrap rate, inability to use risers and cold iron, etc., to achieve low cost, improve yield, The effect of improving solidification directionality

Inactive Publication Date: 2012-12-26
李华山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production of ductile iron, the traditional production process to solve the shrinkage cavity and porosity of castings is mainly realized by using risers and chilled irons. However, when producing multi-functional brackets for diesel engine parts, their shapes are complex, especially the internal Riser and cold iron cannot be used in cavity and tower parts at all, and the scrap rate is over 60%, mainly due to shrinkage cavity and porosity of castings. Similar phenomena will also occur in the production of other parts with complex shapes, resulting in scrap rate increase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Embodiment 1: the present invention is made up of following material, is by weight percentage: chromite sand 93%, iron red powder 4%, ferrosilicon powder 0.6%, furan resin 1.5%, benzenesulfonic acid 0.9%, benzenesulfonic acid accounts for furan 60% of the resin.

Embodiment 2

[0007] Embodiment 2: the present invention is made up of following material, is by weight percentage: 95% of chromite sand, iron red powder 2.5%, ferrosilicon powder 0.8%, furan resin 1.2%, benzenesulfonic acid 0.5%, benzenesulfonic acid accounts for furan 41.6% of the resin.

Embodiment 3

[0008] Embodiment 3: the present invention is made up of following material, is by weight percentage: chromite sand 93.4%, iron red powder 5%, ferrosilicon powder 0.2%, furan resin 1%, benzenesulfonic acid 0.4%, benzenesulfonic acid accounts for furan 40% of the resin.

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PUM

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Abstract

The invention discloses a formula of high-efficiency quenched moulding sand, comprising the following components in percent by weight: 90-95% of chromite sand, 2-5% of iron oxide red powder, 0.2-0.8% of silicon iron powder, 1-1.5% of furan resin and 0.4-1% of benzenesulfonic acid. The formula disclosed by the invention has low cost and a good quenching effect, and is easy in moulding and core making, the shrinkage problem of a casting is solved, the shrinkage effect reaches up to more than 90%, and the yield of the casting is improved.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and in particular relates to a matching ratio of chilled molding sand. Background technique [0002] In the production of ductile iron, the traditional production process to solve the shrinkage cavity and porosity of castings is mainly realized by using risers and chilled irons. However, when producing multi-functional brackets for diesel engine parts, their shapes are complex, especially the internal Riser and cold iron cannot be used in cavity and tower parts at all, and the scrap rate is over 60%, mainly due to shrinkage cavity and porosity of castings. Similar phenomena will also occur in the production of other parts with complex shapes, resulting in scrap rate increased. Contents of the invention [0003] The object of the present invention is to provide a high-efficiency chilled molding sand ratio that can effectively solve the shrinkage cavity and porosity of castings. [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00B22C1/10B22C1/08
Inventor 张继军李华山孙庆张传友张帅赵玉国
Owner 李华山
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