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Manufacturing method of volute sand core

A production method and technology of sand cores, which are applied in the direction of cores, manufacturing tools, casting molding equipment, etc., can solve the problems of complex structure, volute cannot be molded, etc., and achieve the effect of strengthening strength

Inactive Publication Date: 2020-04-10
西峡飞龙特种铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a method for manufacturing a volute sand core, which solves the problem that the volute with a complex internal structure cannot be molded, and makes the processing reference surface of this type of volute free of burrs, ensuring the machining accuracy and providing product quality

Method used

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  • Manufacturing method of volute sand core
  • Manufacturing method of volute sand core
  • Manufacturing method of volute sand core

Examples

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Effect test

Embodiment 1

[0032] A method for making a volute sand core, the sand core is prepared from the following components in parts by weight: 40 parts of silica raw sand, 30 parts of ceramsite sand, 20 parts of iron ore sand, 1 part of polyethylene resin, solidified 1.7 parts of medicine, 1.0 parts of calcium stearate.

[0033] The sand core is formed by solidifying the curing agent with other components at a temperature of 220° C., closed and heated for 90 seconds.

[0034] Described solidifying agent is the aqueous solution of urotropine that mass fraction is 40%.

Embodiment 2

[0036] A method for making a volute sand core, the sand core is prepared from the following components in parts by weight: 44 parts of silica raw sand, 33 parts of ceramsite sand, 22 parts of iron ore sand, 1.2 parts of polyethylene resin, solidified 1.7 parts of medicine, 1.1 parts of calcium stearate.

[0037] The sand core is formed by solidifying the curing agent with other components at a temperature of 230° C., closed and heated for 80 seconds.

[0038] Described solidifying agent is the aqueous solution of urotropine that mass fraction is 42%.

Embodiment 3

[0040] A method for making a volute sand core. The sand core is prepared from the following components in parts by weight: 48 parts of silica raw sand, 36 parts of ceramsite sand, 23 parts of iron ore sand, 1.5 parts of polyethylene resin, solidified 1.7 parts of medicine, 1.2 parts of calcium stearate.

[0041] The sand core is formed by solidifying the curing agent with other components at a temperature of 220° C., closed and heated for 70 seconds.

[0042] Described solidifying agent is the aqueous solution of urotropine that mass fraction is 45%.

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Abstract

The invention discloses a manufacturing method of a volute sand core, and belongs to the technical field of volute casting. The sand core comprises, by weight, 40-56 parts of silicon dioxide crude sand, 30-42 parts of haydite sand, 20-25 parts of chromite sand, 1-2 parts of polyethylene resin, 1.7 parts of curing agents and 1.0-1.3 parts of calcium stearate. The manufacturing method of the volutesand core solves the problem that a volute which is complex in interior structure cannot be subjected to the mold opening manufacture, the processed datum plane of the volute can be free of burrs, theprocessing accuracy is guaranteed, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of volute casting, and in particular relates to a manufacturing method of a volute sand core. Background technique [0002] With the development of science and technology, it has greatly promoted the development and improvement of the engine industry, and correspondingly, the turbocharger volute used with the engine has also been continuously updated and developed rapidly. The assembly and use of high-nickel turbochargers on the engine makes full use of the exhaust gas cycle of the vehicle, greatly reduces exhaust emissions, plays a role in fuel saving and emission reduction, and responds to the country's call for environmental protection and energy reduction. [0003] However, due to the complex internal structure of this type of volute, sand casting makes it difficult to guarantee its accuracy, and a new design method is needed to solve this manufacturing difficulty and make it stable in production and hig...

Claims

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Application Information

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IPC IPC(8): B22C9/10B22C1/00B22C9/24
CPCB22C1/00B22C9/103B22C9/24
Inventor 贾建法王瑞金余嗣瑞李刚闫国福辛阳洋宋会然
Owner 西峡飞龙特种铸造有限公司
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