Air inflow way sand core structure and core manufacturing method

Abstract

The invention discloses an air inflow way sand core structure and a core manufacturing method. According to the core manufacturing method of the air inflow way sand core structure, an integral sand core is formed by effectively combining an air inflow pipe sand core manufactured in a 3D printing manner and multiple air inflow way sand cores manufactured with the same core manufacturing die. The core manufacturing method includes the following steps that the air inflow pipe sand core is mounted on a reference sand core and fixed; the multiple air inflow way sand cores are mounted on the reference sand core and the air inflow pipe sand core; the multiple air inflow way sand cores and the air inflow pipe sand core are smoothened and fixed through viscose and mud strips; and after the air inflow pipe sand core and the multiple air inflow way sand cores are firmly pasted, the integral sand core is taken out. By means of the core manufacturing method, the strength of the integral sand core can be guaranteed, and the requirement of the air way consistency can be met.

Description

technical field [0001] The invention relates to an inlet sand core structure and a core-making method capable of ensuring the performance of the inlet. Background technique [0002] In the engine structure, the intake port is a very critical part. The performance of the air port directly affects the combustion stability, efficiency and emissions of the engine. In the development stage of new engine products, the airway parameters are an important data. The airway design requires that the shape of each cylinder is the same, and the intake conditions of each cylinder are consistent, so as to achieve the best performance of the engine, that is, the airway consistency is required. [0003] At present, the cylinder head blanks used in the development stage of new engine products are mainly produced by moldless sand casting, and the sand cores used in moldless sand casting are mainly manufactured by 3D printing. The larger the size of the 3D printed sand core, the greater the def...

AI Technical Summary

Problems solved by technology

However, the sand core solution of this structure, on the one hand, is affected by the accuracy of sand mold 3D printing, and the accuracy of the key shape and size of the airway is not high

On the other hand, for 3D printing sand molds, the larger the size, the greater the deformation tendency, and the greater the difference between the shapes of the intake ports of each cylinder, which cannot guarantee the consistency of the air port shapes of each cylinder, and cannot meet the air port consistency in the new engine product development process Require

Images