Core head structure not prone to being mixed with residual sand and stable in position

Abstract

The invention discloses a core head structure not prone to being mixed with residual sand and stable in position. In the modeling of a turbocharger volute, a volute channel core needs to be used, a core head is positioned at an opening of a gas inlet flange, since the wall thickness difference is large, the temperature is balanced by the gas inlet flange and other cold iron, the core head is arranged in a cold iron hole, and not only a gap exists, but also there is a floating phenomenon. Nowadays, the core head feeding is decreased, a gap which is about 5 mm wide is generated between the corehead and the cold iron hole, modeling sand enters the gap during modeling for curing and positioning, no seams exist, and the positioning floating phenomenon is eliminated.

Description

technical field [0001] The core head structure of the foundry industry sand core positioned in the shell mold. Background technique [0002] During the production process of Ningbo Fengwo Company’s turbocharger volute production task undertaken by our company, due to the large difference in wall thickness of the volute castings, in order to make the cooling speed of the castings close to each other, chillers are installed on parts such as the intake flange. , but the orifice of the inlet flange is also the position where the core of the runner is positioned. Since the aperture of the cold iron and the core cannot be closely matched, there are many and large gaps. During molding, residual sand is mixed in the gap between the apertures of the cold iron, and at the same time It also makes the core head easy to float, which affects the stability of the runner core in the cavity. Contents of the invention [0003] The present invention is a core head structure that is not easi...

AI Technical Summary

Problems solved by technology

[0002] During the production process of Ningbo Fengwo Company’s turbocharger volute production task undertaken by our company, due to the large difference in wall thickness of the volute castings, in order to make the cooling speed of the castings close to each other, chillers are installed on parts such as the intake flange. , but the orifice of the inlet flange is also the position where the core of the runner is positioned. Since the aperture of the cold iron and the core cannot be closely matched, there are many and large gaps. During molding, residual sand is mixed in the gap between the apertures of the cold iron, and at the same time It also makes the core head easy to float, which affects the stability of the runner core in the cavity

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