Air pressure control mechanism of inner rubber tube coreless extruder

Abstract

The invention discloses an air pressure control mechanism of an inner rubber tube coreless extruder, which includes a machine head, a cavity for plastic molding is arranged in the machine head, and an inner die is arranged at the end of the cavity facing the extrusion port of the cavity , the outside of the inner die is provided with an outer die, the outer die is fixedly connected to the extrusion port of the cavity, there is a gap between the outer die and the inner die, and it also includes a gas supply source and is connected to the gas supply source The adjustable air pressure stabilizing device communicates with the air flow channel provided in the inner die. The beneficial effects of the invention are: the coreless extrusion of the knitted rubber hose can provide compressed air with precise pressure to replace the mandrel, and continuously produce high-quality knitted rubber hose; the air pressure adjustable pressure stabilizing device has a simple structure and low cost.

Description

technical field [0001] The invention relates to an air pressure control device, in particular to an air pressure control mechanism for an inner rubber tube extruder that can realize continuous and uninterrupted coreless extrusion. Background technique [0002] Knitted rubber hose has good mechanical properties and flexibility due to its internal knitting or winding with fiber threads, Oxford threads, etc., which make it have good mechanical properties and flexibility, and are widely used in water pipelines in machinery, automobiles and other fields. The production process of the knitted rubber hose is to extrude the inner rubber hose first, then knit or wrap a layer of reinforcing layer on the outer peripheral side of the inner rubber hose, and then extrude and cover a layer of outer rubber hose on the outer peripheral side of the reinforcing layer. In order to ensure the reliability of the bonding between the inner and outer rubber tubes, the inner rubber tube cannot be vul...

AI Technical Summary

Problems solved by technology

However, since the air supply source of compressed air generally adopts an air compressor, the pressure of the compressed air provided by the air compressor fluctuates within a certain range, so the pressure of the compressed air on the inner rubber hose is also high and sometimes small, resulting in the tube of the inner rubber hose The diameter is unstable, and even bulges may appear, which will affect the final quality of the knitted rubber hose

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