Plastic Extrusion Dies Design

Die design for plastic extrusion part 2 admin 1 mar 06 2003 p art 1 of this article pm a nov dec.

Plastic extrusion dies design.

2002 discussed how the size and shape of an extruded product changes from that of the die flow channel and how to control the size and shape of the product. Plastic extrusion tooling involves a range of design considerations including material wall thickness tooling needs and length tolerance. The adapter section that connects with the output channel of the extruder 2. Basically the die is a block of metal containing an internal flow channel that can be divided into three parts.

Plastics extrusion is a high volume manufacturing process in which raw plastic is melted and formed into a continuous profile. This process starts by feeding plastic material pellets granules flakes or powders from a. Die design for extrusion can be rather complicated since the size and shape of the extruded product varies from that of the die flow channel. Sfr industries has invested heavily in extrusion tooling equipment and knowledgeable personnel assuring we provide consistent high quality plastic profile extrusions time after time.

Die design criteria the die is the assembly located at the end of an extruder which contains an orifice used to shape a plastics melt figure 1. In addition to an optimum design and raw material selection proper tooling designed and developed by our experienced tooling personnel allows us to manufacture. Dual density co extrusion to achieve a dual hardness co extrusion with both rigid and flexible properties two machines are used to feed the separate. Flexible profile designs generally the same rules apply as rigid plastic profile design except that the process of extruding flexible plastic profiles allows for variable wall thicknesses.

Multiple mechanisms affect the size and shape changes in the extruded product and these can be controlled by die design. Crescent plastics is equipped to assist you with custom tooling and design considerations to ensure a high quality product that meets your performance requirements. To simulate a multilayer flow during coextrusion polyxtrue uses a newly developed algorithm called mesh. Plastic extrusion design considerations.

The formed plastic can then be fabricated and either cut into multiple parts or wound as a single part. Pdf on jan 1 2006 milivoje m. Plastic flow s extrusion die design software polyxtrue is based upon a unique and proprietary theory that simulates flow of polymers taking into account not only the shear viscosity but also the elongational viscosity of the polymer.