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Casting method for protecting thin-wall casting from local isolated hot spot shrinkage

A thin-walled casting, isolated technology, used in casting molding equipment, casting molds, casting mold components, etc., can solve the problems of bosses unable to take riser feeding, cooling water chilling, casting leakage, etc., to improve the working environment. conditions, improve production efficiency, and reduce labor intensity

Inactive Publication Date: 2014-04-02
SHANGHAI AISHIDA AUTOMOTIVE COMPONENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the casting process, the boss cannot adopt conventional riser feeding and cooling water quenching, resulting in shrinkage defects of the boss and leakage of the casting

Method used

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  • Casting method for protecting thin-wall casting from local isolated hot spot shrinkage
  • Casting method for protecting thin-wall casting from local isolated hot spot shrinkage
  • Casting method for protecting thin-wall casting from local isolated hot spot shrinkage

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Experimental program
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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] see figure 2 , Figure 3 and Figure 4 , the thin-walled casting of the present invention prevents the casting method of local isolated thermal shrinkage porosity, comprising the following steps:

[0025] Step S1, making sand cores for casting thin-walled castings; in this embodiment, the thin-walled castings use intercooling tubes as an example, such as figure 1 shown;

[0026] Step S2, making a corresponding cold iron mold according to the shape of the isolated heat joint of the thin-walled casting;

[0027] Step S3, using the chilled iron mold to obtain an aluminum alloy chilled iron that fits the isolated hot spot of the thin-walled casting, such as Figure 3a , Figure 3b and shown in Figure 3C; and, the volume of the aluminum alloy chiller is greater than or equal to 3 times that of the isolated hot joint part of the thin-walled casting, because the larger...

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Abstract

The invention discloses a casting method for protecting a thin-wall casting from local isolated hot spot shrinkage. The casting method comprises the steps of manufacturing a sand core; manufacturing a corresponding densener die; utilizing the densener die to obtain an aluminum alloy densener; enabling the aluminum alloy densener to adhere to a corresponding isolated hot spot part of the sand core; manufacturing molten aluminum; placing the sand core in a cavity of a thin-wall casting die; pouring the molten aluminum into the cavity of the thin-wall casting die, and forming a casting by cooling; and performing operation of removing the sand core and a casting head to obtain the finished product thin-wall casting. The hot spot part is subject to chilling through the densener, so that the hot spot first is solidified, and the shortcoming of shrinkage is overcome.

Description

technical field [0001] The invention relates to the field of metal casting, in particular to a casting method for preventing local isolated thermal shrinkage of a thin-walled aluminum alloy part. Background technique [0002] At present, for thin-walled parts that cannot be fed by feeders, and the hot joints are formed by sand cores, and water cooling measures cannot be used, shrinkage porosity is prone to occur at the isolated hot joints during the casting process, so it is difficult to obtain Qualified castings. For example: 12L intercooler pipe is a key component of a large diesel engine, with a weight of 3.2Kg, a material of AlSi9Cu1, a wall thickness of 4.5mm, and a Φ16mm boss in its cavity. During the casting process, the boss cannot adopt conventional riser feeding and cooling water quenching, resulting in shrinkage defects of the boss and leakage of the casting. like figure 1 As shown, it is a cross-sectional view of the intercooler tube part. The figure shows an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/04B22C9/24
Inventor 陈灵巧
Owner SHANGHAI AISHIDA AUTOMOTIVE COMPONENTS
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