Set the indicator at your compound hardness, then read the machine temperature setting for each extrusion condition.
Compound Hardness
Selected
Indicator
Extrusion ConditionProfileSetting
The information contained herein is believed to be reliable but all recommendations or suggestions are made without guarantee, in as much as conditions and methods of commercial use are beyond our control.
Notes
Temperature profiles are based primarily on compound durometer and desired melt flow properties. The following profile and stock temperatures are recommended as starting conditions. Variations to these conditions should be made based on screw and die design, equipment wear and product throughput.
Temperature Profile
Standard cool to hot (hopper to die) profiles are common for general purpose compounds.
Die Design
Streamlined low intensity dies are recommended for melt processing PVC compounds.
Screw Design
Standard general purpose screws may be used to process flexible PVC compounds. The recommended length over diameter (L/D) range for the screw is 16/1 through 24/1. Recommended compression ratio range is 2/1 to 3/1.
PVC compounds are thermal and shear sensitive materials, care should be exercised to avoid excessive heats or delays during the extrusion process.
Single Screw Extruders
Effect of Process Variables
Click on a process variable to see the corresponding effects. Read positive, negative, or no effect at the appropriate heading.
▲Increases▼Decreases–No effect
Machine Variables
Settings that can be adjusted on the extrusion equipment itself, such as temperature profiles, screw speed, and die pressure.
Screw Variables
The design and operation of the extruder screw, including compression ratio, length-to-diameter ratio, and flight geometry.
Die Variables
The design and operation of the extrusion die, including die geometry, land length, and die swell characteristics.
Material Variables
Properties of the PVC compound itself, such as molecular weight, plasticizer content, and additive formulations.
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