Double-colored coextruded hollow pipeline mold

Abstract

The invention discloses a double-colored coextruded hollow pipeline mold which comprises a mold body. A transitional plate, a bracket plate, a converging plate, a co-extruding plate and an opening mold plate are successively arranged at one end of the mold body; a mold core and a cavity are formed through the transitional plate, the bracket plate, the converging plate, the co-extruding plate and the opening mold plate; a co-extruding port is formed in one side of the co-extruding plate; a first co-extruding runner, a second co-extruding runner and a third co-extruding runner successively communicating are arranged in the co-extruding plate; the co-extruding port communicates to the first co-extruding runner; the third co-extruding runner communicates to the cavity; and an adjusting baffleplate is arranged on the other side of the co-extruding plate. When the mold is used, a co-extruded material melt flows into the cavity successively from the co-extruding port, the first co-extrudingrunner, the second co-extruding runner and the third co-extruding runner to form double-colored coextrusion. By means of a simple structure, the product quality is improved, the input cost is low andthe mold is conveniently used.

Description

【Technical field】 [0001] The invention relates to the technical field of moulds, in particular to a two-color co-extrusion hollow pipe mould. 【Background technique】 [0002] Two-color co-extrusion is an extrusion processing method of plastic products. It processes a product with two different colors by conveying two different colors of materials (materials can be different) to the extrusion die through different flow channels. . However, there are two deficiencies in the hollow pipe processed by the existing two-color co-extrusion die: (1) Since the co-extrusion flow channel is shorter than the main flow channel, the co-extrusion melt flow The resistance is small, the pressure is high, and the density is high, which leads to different mold expansion coefficients, internal stress in the hollow pipe, easy deformation, uneven thickness, and poor product quality; (2) due to the co-extrusion melt The fluidity of the body is relatively good, and the boundary effect of the melt i...

AI Technical Summary

Problems solved by technology

However, there are two deficiencies in the hollow pipe processed by the existing two-color co-extrusion die: (1) Since the co-extrusion flow channel is shorter than the main flow channel, the co-extrusion melt flow The resistance is small, the pressure is high, and the density is high, which leads to different mold expansion coefficients, internal stress in the hollow pipe, easy deformation, uneven thickness, and poor product quality; (2) due to the co-extrusion melt The fluidity of the body is relatively good, and the boundary effect of the melt is correspondingly small. The melt of the co-extrusion material is easy to fill to the corner, forming a phenomenon of local thickening of the corner, which further leads to poor quality of the product.

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