Core-pulling mechanism of hot core box die

Abstract

The invention discloses a core-pulling mechanism of a hot core box die, which comprises a cylinder support, a cylinder fixed plate arranged on the cylinder support, a cylinder arranged on the cylinder fixed plate, a cylinder arranged on the cylinder fixed plate, and a cylinder connecting shaft the lower end of which passes through the cylinder fixed plate. The core-pulling mechanism of the hot core box die is characterized in that: both sides on the lower part of a core-pulling connecting frame are connected with a core-pulling block respectively by a first core-pulling connecting block and a second core-pulling connecting block; a hoop on the upper part of the core-pulling connecting frame is connected with the lower end of the cylinder connecting shaft; the upper ends of two guide pillars are connected on the cylinder support by end covers, while the lower ends thereof are matched with guide holes on both sides of the core-pulling connecting frame; the core-pulling connecting frame and the core-pulling block connected with the core-pulling connecting frame can slide up and down along the two guide pillars; and the lower end of the core-pulling block is connected with a sand core. The invention has the advantages that the core-pulling mechanism avoids the problem that the cylinder is influenced by high temperature; the sealing component is also not easy to be aged; and the core-pulling mechanism also avoids the phenomenon that the strip core-pulling block is blocked.

Description

technical field [0001] The invention relates to an oblique core-pulling mechanism for a core-making mold of a hot core box, in particular to a core-pulling mechanism for a strip-shaped core-pulling mold or a plurality of core-pulling molds. Background technique [0002] At present, the foundry industry generally adopts the hot box process to manufacture sand cores, and the manufacture of the core-pulling mechanism of the hot box mold is the key to the implementation of the hot box process. The existing core-pulling mechanism of the hot core box mold generally uses a cylinder connecting shaft to directly connect the cylinder and the core-pulling block together. Its disadvantages are as follows: First, the temperature of the hot core box mold is relatively high during operation, which is 250-300°C, and the heat will be directly transmitted to the cylinder through the cylinder connecting shaft, resulting in aging and failure of the cylinder sealing element; , if the installati...

AI Technical Summary

Problems solved by technology

Its disadvantages are as follows: First, the temperature of the hot core box mold is relatively high during operation, which is 250-300°C, and the heat will be directly transmitted to the cylinder through the cylinder connecting shaft, resulting in aging and failure of the cylinder sealing element; , if the installation position of the cylinder is not suitable, it will cause uneven force on the core-pulling block, and the core-pulling block is easily stuck when pulling the core

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