Gum sealing check structure of injection molding machine

Abstract

The invention discloses a gum sealing check structure of an injection molding machine. The gum sealing check structure comprises a screw head connected with a screw; a gum washer is sleeved on the screw head; a tubular check ring is sleeved between the head part of the screw head and the gum washer; the check ring comprises a front check ring and a rear check ring; inclined planes are respectively arranged at the connecting end faces of the front check ring and the rear check ring; the inclined plane on the front check ring and the inclined plane on the rear check ring form a groove; the section of the groove is of a V shape or a U shape; the front check ring and the rear check ring are integrally molded; the gum washer is pressed on the screw; the screw head, the front check ring, the rear check ring, the gum washer and the screw are arranged inside a charging barrel; the charging barrel is connected with a jet nozzle flange, and a jet nozzle is inserted on the jet nozzle flange. According to the invention, the contradiction between the contact area and rollback force of the check ring is effectively solved; the gum sealing check structure can be applied to various injection molding machines, and has the characteristics of being simple and reasonable in structure, long in service life, fast in response, accurate in metering, and wide in application range.

Description

technical field [0001] The invention relates to an injection molding machine, in particular to a glue sealing anti-reverse structure of the injection molding machine. Background technique [0002] The sealant anti-return mechanism is an important part of the plasticizing device of the injection molding machine. It is mainly composed of the rubber feed head, the rubber pad and the non-return ring. When pushing, it is required that the non-return ring can quickly and reliably contact the rubber pad, cut off the colloid return path, and ensure the accuracy of the injection volume. However, when the glue is melted, the screw is rotated under the action of external force. At the same time, with the increase of the liquid colloid at the front end of the barrel, when the screw is forced to retreat slowly, the screw will drive the rubber head and the rubber pad to rotate together, so that the liquid colloid flows forward along the groove of the screw, and pushes the anti-reverse rin...

AI Technical Summary

Problems solved by technology

This anti-reverse ring structure is complex, and the use effect is not ideal

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