Cold core manufacturing process and device

Abstract

The invention discloses a cold core manufacturing process and device. A hot core and a cold core box are matched to complete the process, a cavity is formed in the cold core box, and the process comprises the following steps: placing the hot core in a specified position of the cavity; injecting cold core sand into the cavity in which the hot core is placed; after the hot core is wrapped by the cold core sand, blowing curing gas into the cavity; and after the cold core sand is solidified, taking the sand core out. The hot core is adopted to replace an original cold core at the designated position in the cold core box, the hot core prepared in advance is placed at the designated position during core manufacturing, the hot core and the cold core are integrally formed, the strength of the sand core at the specific position can be effectively improved, and the later assembly labor intensity is reduced; and according to the technical scheme, the specific area of the sand core is formed by the hot core, casting defects caused by the sand core can be remarkably improved, in addition, the sand core is rapidly hardened in the cold core box through blowing, and compared with a hot core box, high efficiency and energy saving are better.

Description

technical field [0001] The invention belongs to the field of casting cold box production, and in particular relates to a cold core process for improving the quality of sand cores at a specific position of the cold core, in particular to a cold core core making process and a device. Background technique [0002] As an environmentally friendly product with high efficiency, energy saving and high technology content, turbocharger can improve the exhaust pollution of automobile engine, improve the power and weight ratio of the engine, improve the torque characteristics of the engine, reduce fuel consumption and engine noise, etc. Advantages, it has become the standard configuration of modern automobiles and construction machinery. Turbocharger technology improves the intake air density through the turbocharger, which can comprehensively improve the overall performance of the engine, such as power, economy, and emission indicators, and inject strong power into the engine. It is kn...

AI Technical Summary

Problems solved by technology

The patent application decides to use cold core sand or hot core coated sand based on the simplicity or complexity of the specific position of the product structure, without considering the problem that the hot spot of the casting is thick and large, which can easily lead to casting defects such as sand washing and sand sintering

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