Casting method for complex sand core integrating

Abstract

The invention relates to a casting method, in particular to a casting method for complex sand core integrating. The casting method for complex sand core integrating includes the following steps: designing a process, fabricating a mold, molding, making a core, disassembling the core, closing the mold, casting, cooling, and opening. The casting method provided by the invention is unique, and can improve dimensional accuracy of a casting, and reduce cleaning and sanding workload of casting fins.

Description

technical field [0001] The invention relates to a casting method, in particular to a casting method in which complex sand cores are used for casting. Background technique [0002] In the casting process design, for complex sand cores that cannot be removed and want to be adjusted, the conventional treatment method is to split the complex sand cores that cannot be removed into multiple sand cores, and then carry out core bonding and core assembly. Most of them will reduce the dimensional accuracy of castings and increase the workload of casting flash cleaning and grinding. [0003] For internal combustion engine body castings, the dimensional accuracy level is required to be CT9. There are two common casting methods: 1) The inner cavity cylinder liner and the main core of the crankshaft are cored separately, and then the core is lowered. The dimensional deviation of the cylinder liner is lower than CT14 level, resulting in the scrapping of castings and frequent borrowing of ...

AI Technical Summary

Problems solved by technology

There are two common casting methods: 1) Inner cavity cylinder liner and crankshaft main core are cored separately, and then cored, and the dimensional deviation of the cylinder liner is lower than CT14 level, resulting in scrapping of castings and frequent processing of lines, which cannot stabilize the batch size Production; 2) The inner cavity cylinder liner and the main core of the crankshaft are finished. Where materials cannot be removed, multiple sticky cores are made and bonded to the main core. This method can improve the dimensional accuracy to CT10-11, but the core box The quantity and the number of core making increase, the sharp sand in the sand core is easy to produce defects, the workload of core making and the workload of casting flash cleaning and polishing increase

Complicated cavity core production seriously affects the dimensional accuracy, quality and efficiency of castings

[0004] So far, there is no way to overcome the above drawbacks