Tools: how to choose them

The quality of the cable depends not only on the head and tools used but even on the other process parameters: Extruder, Screw design, Barrel, thermoregulation, etc. Temperature profile into the extruder and head Cooling Mode of the cable after the X-Head, water temperature, etc. Tensioning Device/mode of the cable, Etc. The extrusion head is […]

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Die drool, die swell, lump, surface quality

The plastic materials are Non-Newtonian material and they are defined Pseudo-Newtonian materials. They are considered Viscoelastic materials. This can be explained by Kelvin and Maxwell model so by system of springs and viscous dumpers.     The viscoelasticity of the polymers plays a fundamental role in the extrusion operation and process: Die Drool; Die Swell; […]

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