Co-extruding runner of four-cavity auxiliary sectional material co-extruding mold

Abstract

The invention discloses a co-extruding runner of a four-cavity auxiliary sectional material co-extruding mold. The four-cavity auxiliary sectional material co-extruding mold comprises a mold head template (3), the mold head template (3) is provided with four mold cavities, and the co-extruding runner is arranged on the mold head template (3); the co-extruding runner comprises a main runner and two branch runners; each branch runner is communicated with two mold cavity runners, and each mold cavity runner is communicated with one mold cavity. By adopting the technical scheme, the flowing path of materials in the runners is shortened, and the phenomena of material leakage, material pasting, insufficient pressure for co-extruding the materials, a small quantity of discharged materials and the like in the prior art are solved; and the integral structure of the mold is simplified, the processing and manufacturing costs of the mold are saved, and convenience is provided for operation and use of the mold.

Description

technical field [0001] The invention belongs to the technical field of plastic profile extrusion moulds, and relates to a multi-cavity auxiliary profile co-extrusion die structure of a plastic profile extrusion mold, more specifically, the invention relates to a four-cavity auxiliary profile co-extrusion die co-extrusion channel. Background technique [0002] Below with the attached figure 1 Analyze existing technologies: [0003] Since the co-extrusion flow channel of the four-cavity auxiliary profile needs to be divided three times, the current co-extrusion flow channel of the four-cavity auxiliary profile uses an additional flow device 1 to divide the co-extrusion material once, and then the co-extrusion on the forming plate of the mold The flow channel is used for material supply, and the co-extrusion flow channel is divided twice on the die forming plate 2 to achieve the purpose of covering the visible surface of the four-cavity auxiliary profile with a colored co-ext...

AI Technical Summary

Problems solved by technology

[0004] 1. The flow channel of this kind of scheme needs to make an additional device separately to divert the co-extruded materials, which increases the manufacturing cost of the mold, and the mold is extremely inconvenient in the process of operation and use, which brings trouble to the operator;

[0005] 2. The connection between the additional splitter device 1 and the die forming plate 2 is prone to loose connection, resulting in overflow and leakage of co-extruded materials;

[0006] 3. If the runner stroke of this type of scheme is too long, the co-extruded material will stay in the runner longer, which will easily cause the material to paste. At the same time, if the runner stroke is too long, the energy loss will be greater when the material flows in the runner. Too much, resulting in insufficient co-extrusion material pressure, less co-extrusion layer discharge, etc.

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