Pushing structure of mold

Abstract

The invention provides a pushing structure of a mold, and belongs to the technical field of molds. The problems that an existing ejector rod is poor in moving stability, and a pushing structure is high in maintenance cost are solved. According to the pushing structure of the mold, the mold comprises a sliding seat with a pouring runner, the pushing structure comprises an ejector rod capable of extending into the pouring runner, the pushing structure further comprises a guide sleeve connected with the sliding seat, a moving block attached to the inner wall of the guide sleeve is embedded in the guide sleeve, the ejector rod is arranged on the moving block in a penetrating mode, and a long-strip-shaped long-strip-shaped hole penetrating in the radial direction is formed in the inner wall of the guide sleeve. A positioning pin for positioning the moving block and the ejector rod is arranged in the long-strip-shaped hole in a penetrating mode, a first reset spring elastically abutting against the moving block is arranged in the guide sleeve, and the positioning pin always has the trend of driving the ejector rod to move in the direction away from the pouring runner along the long-strip-shaped hole. The pushing structure of the die has the advantages that the moving stability of the ejector rod is improved, and meanwhile the maintenance cost of the pushing structure is reduced.

Description

technical field [0001] The invention belongs to the technical field of moulds, and relates to a pushing structure of a mould. Background technique [0002] Molding compound injection mold is the most commonly used molding mold in the production of thermoplastic products. It mainly includes a fixed mold, a moving mold and a sliding seat that is slidably connected to the moving mold. In the mold cavity, the side of the sliding seat close to the fixed mold is provided with a pouring runner connected to the mold cavity, and the fixed mold is connected with a guide rod obliquely pierced on the sliding seat. During pouring, the plastic melt flows into the mold cavity through the pouring runner. After pouring, the plastic melt remaining in the pouring runner will form injection molding waste connected to the workpiece. When the mold is opened, the movable mold moves relative to the fixed mold, and the guide rod drives The sliding seat moves relative to the movable mold, so that th...

AI Technical Summary

Problems solved by technology

However, the sliding seat is usually located between the upper mold and the lower mold. If the ejector pin in this document is used to push the injection molding waste, it can be predicted that the ejector pin needs to pass through the movable mold, so the length of the ejector pin needs to be set longer. Longer thimbles will result in less stable movement of the thimble

Based on the problem of low movement stability of the thimble due to its excessive length, the solution that those skilled in the art can easily think of is to adopt a segmented thimble structure to improve the movement stability of the thimble by shortening the distance that each thimble needs to move , but this method will lead to an increase in the maintenance cost of the ejector structure, because each segment of the ejector pin interacts, and the wear amount of each segment of the ejector pin is also uncontrollable, so once the ejector pin wears out, all ejector pins need to be repaired in time replacement, which undoubtedly increases the maintenance cost of the jacking structure

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