Blow molding machine head

Abstract

The invention is mainly applied to the field of blow molding of blow molding machines, and particularly relates to a blow molding machine head which comprises a machine head. Annular spiral channels are distributed inside the machine head, distribution plates are arranged at the bottoms of the spiral channels, an inlet runner which is communicated with a corresponding feed inlet is vertically arranged inside each distribution plate, a one-to-two runner is communicated with the top of each inlet runner, two ends of each one-to-two runner are communicated with the bottoms of vertical communication holes, two-to-four runners are communicated with the tops of the vertical communication holes, each of two ends of each two-to-four runner is communicated with an end of a horizontal communicationhole, the other end of each horizontal communication hole is communicated with a four-to-eight runner, two ends of each four-to-eight runner are positioned on two sides of the corresponding horizontalcommunication holes, the tail end of each four-to-eight runner is upwardly connected with an eight-to-sixteen runner, the tail ends of the eight-to-sixteen runners are communicated with annular channels, and each spiral channel is communicated with the corresponding annular channel. The blow molding machine head has the advantages that the lengths of runners can be shortened to a great extent, material burning conditions can be reduced, and accordingly the product quality can be enhanced; intermediate cavities are reserved, and accordingly dies can be conveniently replaced at any time.

Description

technical field [0001] The invention relates to a blow molding machine head, which is mainly used in the field of blow molding on a blow molding machine. Background technique [0002] When the multi-layer co-extrusion blown film machine is working, the molten materials of each layer are distributed in the blown film head, and finally merged and extruded at the circular die to form a multi-layer co-extruded film bubble. When working, the molten material enters from each feed port, and then rotates and rises along each spiral flow channel. During the flow process of rotating and rising along each spiral groove flow channel, the molten material continues to flow from between every two layers of concentric sleeves. As the material rotates and rises, the proportion of the material moving axially along the spiral channel becomes smaller and smaller, while the proportion of material leaking upward along the annular gap becomes larger and larger, and finally all the molten material ...

AI Technical Summary

Problems solved by technology

Usually, before the material enters the spiral flow channel, it needs to be distributed through a distributor. The existing distributor usually has a long flow channel, and the material is prone to thermal oxidation reaction in the equipment, resulting in paste, reducing product quality and increasing production costs.

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