Method of producing U-type pipe fitting and core thereof

Abstract

The invention relates to a method for molding U-shaped tube, which is characterized in that: when producing the U-shaped tube, moving along the guide grooves at two sides of its slicing surface A-A via chain and the annular ring connected to the chain, to connect the section core annular ring at the surface A-A; when the U-shaped tube is molded, extracting out the core, the chain will draw out the annular ring along the guide groove; then taking the tube outside the mould, to repeat aforementioned steps. The invention also provides a relative section core. And the section core can automatically demould, and the produced tube has no dead corner, to improve the producing efficiency and reduce the cost.

Description

technical field [0001] The invention relates to the field of pipe fitting manufacturing, in particular to a method used in the production and molding of U-shaped pipe fittings and a core thereof. Background technique [0002] Because the two outlet ends of the U-shaped pipe are turned by 180 degrees, it is difficult to complete the core-pulling and demoulding of the core used in production. It needs to be produced through multiple processes, which increases the production cost and adds to the design and use of the mold. For example, Chinese patent ZL99237880 discloses a "U-shaped pipe fitting injection molding mold". The mold core is divided into two symmetrical parts, and each part is divided into a straight core and an arc core. The arc core part The flexible and controlled connection is adopted to make it be drawn out in a corner manner; because the core of the U-shaped pipe fitting mold is not symmetrical, the U-shaped pipe produced is due to the butt joint of the straig...

AI Technical Summary

Problems solved by technology

[0002] Because the two outlet ends of the U-shaped pipe are turned by 180 degrees, it is difficult to complete the core-pulling and demoulding of the core used in production. It needs to be produced through multiple processes, which increases the production cost and adds to the design and use of the mold. For example, Chinese patent ZL99237880 discloses a "U-shaped pipe fitting injection molding mold". The mold core is divided into two symmetrical parts, and each part is divided into a straight core and an arc core. The arc core part The flexible and controlled connection is adopted to make it be drawn out in a corner manner; because the core of the U-shaped pipe fitting mold is not symmetrical, the U-shaped pipe produced is due to the butt joint of the straight core and the arc core, and the interpenetration of the core after pulling. The dead angle formed by the wire not only affects the aesthetics of the product appearance, but also has a blocking effect on the transmission medium. Therefore, the method and core involved in the above-mentioned production of U-shaped pipe fittings must be improved on this basis.

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