Moving mechanism for core box trolley of core-making machine

Abstract

The invention discloses a moving mechanism for a core box trolley of a core-making machine. The moving mechanism comprises a core box trolley, a pair of parallel guide rails, a driving structure and a guiding structure, wherein the guide rails are formed by connecting a workbench guide rail and a lower ejection core guide rail. The moving mechanism is characterized in that a pair of support plates are fixedly connected with the bottom of the core box trolley; a plurality of air holes are distributed in the support plates; an air cavity is formed in the bottom of the core box trolley; the bottom of the air cavity is communicated with the air holes formed in the support plates; one end of the air cavity is connected with a compressed air source by virtue of a gas pipeline; the lower surfaces of the support plates are planes and are matched with the plane of the workbench guide rail or the lower ejection core guide rail; when the core box trolley moves, an air cushion layer is arranged between the lower surfaces of the support plates and the workbench guide rail or the lower ejection core guide rail. According to the moving mechanism, the plane of the core box trolley is supported, by adjusting the pressure of compressed air, same sliding friction force of core boxes with different weights is realized, so that the guide rails are uniformly abraded, have an integrated structure and are long in service life and high in reliability.

Description

technical field [0001] The invention relates to a part of metal casting equipment, in particular to a moving mechanism of a core-making core box trolley. Background technique [0002] In the casting process, when preparing sand cores, the core box needs to move back and forth between the core making station and the lower core lifting station. At the core making station, the core box is lifted upwards to the lower surface of the sand shooting mechanism for Sand shooting operation, and then blowing air to solidify; at the lower core station, the cured sand core is ejected from the lower mold. The core box trolley is used to shuttle the core box back and forth between the core-making station and the lower core-jacking station, and is an important part of the core-making machine. [0003] In the existing core making machines, the structure of support rollers and side guide wheels is mainly used or V-shaped wheels are directly used to meet the back and forth movement and guidanc...

AI Technical Summary

Problems solved by technology

[0004] This type of structure has relatively high requirements for rollers or V-shaped wheels. Because the rollers and guide rails are usually in line contact with this structure, the stress is large, and the life of the rollers and guide rails is short. In addition, the support force during mold clamping is satisfied by using plane contact. The required structure will cause the roller to break away from the guide rail. In order to achieve positioning, the overall structure is more complicated. In addition, because the load of the core box usually changes, the overall weight is one ton to eight tons, and the change of pressure also has a certain impact on the life of the roller and guide rail. degree of influence

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