A mold that automatically cuts off the spout

Abstract

The invention provides a die for automatically cutting a drainage opening. According to the die for automatically cutting the drainage opening, after a fixed die body and a movable die body are opened, runner centres jack a runner, and a product centre jacks a product; an air cylinder and an oil cylinder are fixed to a baffle, the air cylinder buckles a cutter bar in a hanging mode, and the oil cylinder buckles an oil cylinder hanging plate in a hanging mode; the oil cylinder hanging plate is fixed to the back face of a slide block base through a screw, the cutter bar penetrates through the slide block base and slides in a hole of the slide block base, and accordingly the cutter bar drives a cutter fixed to the cutter bar to move; when an centre plate is jacked up by an external injection molding machine, a pressing block is uplifted, the drainage opening of a runner is jacked up, and at the moment, the air cylinder drives the cutter bar to move to drive the cutter to cut the drainage opening of the runner; later, the centre plate and the pressing plate are reset, and an air cylinder mechanical control valve is controlled to enable the air cylinder to recede; and in this way, jacking up and resetting of the centre plate drive the pressing block to be jacked up and reset, accordingly, the mechanical control valve is controlled to enable the air cylinder to recede, and the purpose that the drainage opening is automatically cut in the die is achieved.

Description

technical field [0001] The invention relates to the field of PVC pipe moulds, more specifically, to a mold for automatically cutting off a nozzle. Background technique [0002] For the PVC drainage pipe products that currently utilize large nozzles to feed the glue, it is generally necessary to manually remove the glue inlet after injection molding, and the manual production efficiency is low. At present, the more advanced method is to use hot runner technology for injection molding, but for some plastics or products that are easy to decompose, such as PVC, the hot runner process is difficult to adjust, and the plastic is easy to carbonize during injection molding, and the input cost of the hot runner is high, and the applicability is not strong. . However, the traditional use of latent nozzles to achieve in-mold shear-free is difficult for PVC drainage pipes with poor fluidity. Problems such as poor nozzle cuts, difficult flow patterns, and unqualified product performance ...

AI Technical Summary

Problems solved by technology

[0002] For PVC drainage pipe products that currently use large nozzles for glue injection, it is generally necessary to manually cut off the glue inlet after injection molding, and the manual production efficiency is low.

At present, the more advanced method is to use hot runner technology for injection molding, but for some plastics or products that are easy to decompose, such as PVC, the hot runner process is difficult to adjust, and the plastic is easy to carbonize during injection molding, and the input cost of the hot runner is high, so the applicability is not strong

However, the traditional use of latent nozzles to achieve in-mold shear-free is difficult for PVC drainage pipes with poor fluidity. Problems such as poor nozzle cuts, difficult flow patterns, and unqualified product performance often occur. In view of these disadvantages, it is necessary to develop a A low-cost, high-efficiency, high-quality, long-life in-mold nozzle mechanism

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