Core dismounting and taking method of complicated sand core

Abstract

A core dismounting and taking method of a complicated sand core comprises the following steps that an upper mold and a lower mold of a core box are manufactured according to a prefabricated model; a plurality of internal threads are formed on the upper mold, sand is fed into the sand box from a sand feeding opening, the sand is compacted while being fed, and after sand feeding is completed, the sand feeding opening is scraped to be flat; the sand core is hardened; the sand core is dismounted; and the sand core is taken. According to the core dismounting and taking method of the complicated sand core, the internal threads are arranged on the upper mold, a plurality of matched threaded rods are adopted, and the upper mold is lifted in the vertical direction through the reactive force of a parting surface of the lower mold on the threaded rods and the engagement force between the threaded rods and the internal threads until demolding is achieved; and in this way, the upper mold is controlled to be lifted in the vertical direction through the threaded rods, the left-right shake risk is avoided, and the risk that the sand core of a complicated-shape structure is damaged is fundamentally eradicated.

Description

technical field [0001] The invention relates to the technical field of sand casting, in particular to a method for removing and coring complex sand cores. Background technique [0002] The core-making process is one of the most important processes in casting. The main task of this process is to produce qualified sand cores that meet the process requirements. How to completely remove the sand cores, especially those with complex shapes, from the core box Essential skills for core workers. [0003] Sand cores with complex shapes contain sand core structures in both the upper mold and the lower mold of the core box, so the sand cores are completely taken out from the core box, including taking out the sand cores from the upper mold and the lower mold respectively. [0004] Usually, when the hardening of the sand core meets the requirements of core removal and core removal, the handle of the upper mold is tightened by a crane, the upper mold is lifted, and then the lower mold i...

AI Technical Summary

Problems solved by technology

[0004] Usually, when the hardening of the sand core meets the requirements of core removal and core removal, a crane is used to tighten the handle of the upper mold, the upper mold is lifted, and then the lower mold is turned over to take out the sand core. During this process, the sand core in the upper mold When the structure is relatively complex or detailed, due to the poor stability of the crane, there are uncontrollable factors of left and right shaking, which will damage the sand core in the upper mold, resulting in the entire sand core being unusable

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