Plastic special-shaped section bar same-mold different-exit extruding mold

Abstract

The invention discloses a plastic-profile same-die different-product extrusion die, which belongs to the field of designing and manufacturing plastics extrusion dies. The extrusion die is characterized by comprising a shunt base, a transitional plate, a shunt cone, a transitional backing plate, a shunt bracket plate, a precompression plate, a compression plate, a performing plate, a finish mold plate and a core. After plastic melt extruded from an extruder is shunted through shunt channels with different structural parameters on the shunt base, the plastic melt enters a left runner and a right runner of the die which have different structural parameters respectively, and is shunted, compressed and then extruded from the finish mold plate so as to form plastic parison with different section shapes, and the plastic profiles with different section shapes are formed after the plastic parison is cooled and set. The structural parameters of the runners of the die are determined by adopting finite element numerical analysis and an optimization method, so as to ensure that the melt in the runners is identical in flow balance and extrusion speed and realize that the plastic profile products with two different section shapes can be simultaneously produced on the same extrusion production line. The extrusion die has the advantages of simple structure and high production efficiency.

Description

Technical field [0001] The invention belongs to the technical field of extrusion die design and manufacturing, and relates to the design of an extrusion die for the same die for plastic profiles. Background technique [0002] Plastic extrusion molding has become one of the main molding methods for plastic products due to its advantages of high efficiency, low investment, convenient manufacturing, continuous production and clean environment. According to statistics, the output of extruded products has accounted for more than 40% of the total output of plastic products. Extrusion molds can mold almost all thermoplastics and some thermoset plastics, especially plastic profiles for doors and windows, which have a series of characteristics such as energy saving, material saving, anti-corrosion, flame retardant, sound insulation, beautiful and durable, and convenient construction. It is quickly applied and promoted. [0003] In the plastic profile extrusion production process, the extr...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a plastic profile extrusion die with the same mold and different output, which is used to simultaneously extrude two types of plastic profile products with different cross-sectional shapes on the same extrusion production line, which can solve the problem that enterprises need to increase the variety of profile materials. Significantly increase capital investment in extrusion equipment, significantly improve production efficiency, shorten manufacturing cycle, and reduce manufacturing costs

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