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High-precision casting die

A casting mold, high-precision technology, used in casting molding equipment, casting molds, casting mold components, etc., can solve the problems of low precision of resin self-hardening sand molds, low dimensional accuracy, poor surface finish of castings, etc., and achieve high hardness. , high dimensional accuracy, clear edges and corners

Inactive Publication Date: 2016-04-27
CHANGSHU HONGQIAO CAST STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally speaking, for medium and large castings, resin self-setting sand molds can be used, but the precision of resin self-setting sand molds is not high, resulting in poor surface finish and low dimensional accuracy of cast castings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A high-precision casting mold, the casting mold is a resin sand mold, and the resin sand mold includes an upper mold box, a lower mold box, a cavity between the upper mold box and the lower mold box, and a The mold cavity and the sprue of the sprue, the inner wall of the mold cavity is attached with a graphite coating, the components of the resin sand mold and the mass ratio of each component are: 70% of quartz sand, 15% of furan resin, and 10% of curing agent %, silane coupling agent 5%.

[0014] Wherein, the particle size of the quartz sand is 60 mesh.

[0015] The thickness of the graphite coating is 30 μm.

[0016] The diameter of the runner is 40mm.

Embodiment 2

[0018] A high-precision casting mold, the casting mold is a resin sand mold, and the resin sand mold includes an upper mold box, a lower mold box, a cavity between the upper mold box and the lower mold box, and a The mold cavity and the sprue of the sprue, the inner wall of the mold cavity is attached with a graphite coating, the components of the resin sand mold and the mass ratio of each component are: 71% of quartz sand, 18% of furan resin, and 8% of curing agent %, silane coupling agent 3%.

[0019] Wherein, the particle size of the quartz sand is 65 mesh.

[0020] The thickness of the graphite coating is 35 μm.

[0021] The diameter of the runner is 50mm.

Embodiment 3

[0023] A high-precision casting mold, the casting mold is a resin sand mold, and the resin sand mold includes an upper mold box, a lower mold box, a cavity between the upper mold box and the lower mold box, and a The mold cavity and the sprue of the sprue, the inner wall of the mold cavity is attached with a graphite coating, the components of the resin sand mold and the mass ratio of each component are: 75% of quartz sand, 14% of furan resin, and 7% of curing agent %, silane coupling agent 4%.

[0024] Wherein, the particle size of the quartz sand is 70 mesh.

[0025] The thickness of the graphite coating is 40 μm.

[0026] The diameter of the runner is 60mm.

[0027] The invention discloses a high-precision casting mold, which is made of quartz sand, furan resin, and curing agent silane coupling agent with a reasonable proportion, and a graphite coating is attached to the inner wall of the cavity, which has high hardness and high precision. The characteristics of the cast...

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PUM

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Abstract

The invention discloses a high-precision casting die. The casting die is a resin sand die. The resin sand die comprises an upper moulding box, a lower moulding box, a cavity and a runner; the cavity is positioned between the upper moulding box and the lower moulding box; the runner communicates with the cavity and a sprue gate; a graphite coating is attached to the inner wall of the cavity; and the resin sand die comprises the following components in percentages by mass: 70%-75% of quartz sand, 14%-18% of furan resin, 7%-10% of a curing agent, and 3%-5% of a silane coupling agent. Through the mode, the high-precision casting die has the features of high hardness and high precision, so that the casted castings are smooth in surface, clear in edges and corners and high in dimensional precision.

Description

technical field [0001] The invention relates to the field of casting molds, in particular to a high-precision casting mold. Background technique [0002] According to statistics, 60-70% of all castings produced in my country are produced with sand molds, and about 70% of them are produced with clay sand molds. The main reason is that sand mold casting has lower cost and simpler production process than other casting methods. The production cycle is short. Therefore, castings such as engine cylinder blocks, cylinder heads, and crankshafts of automobiles are all produced by clay green sand technology. When the wet mold cannot meet the requirements, consider using clay sand surface dry sand mold, dry sand mold or other sand molds. The weight of castings produced by clay green sand casting can range from a few kilograms to tens of kilograms, while the weight of castings produced by clay dry molding can reach tens of tons. [0003] Generally speaking, for medium and large castin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C1/22B22C3/00B22C9/02
CPCB22C1/00B22C1/224B22C3/00B22C9/02
Inventor 陈学忠
Owner CHANGSHU HONGQIAO CAST STEEL CO LTD
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