Rubber Extrusion

Process of heating Polymer materials and then pushing at high pressure through a mould to enable formation of different shapes and complex profiles.

Cooling and Pattern - There is a vast number of products, parts and components that are formed from extruded rubber, including door and window seals, automotive seals, tubes, hoses, belts, and a lot more. In some cases, the freshly extruded material receives a textured finish, by design, from the material it rests on top of. In most cases, the freshly extruded product needs to cool, and requires a flat (or intentionally contoured) surface on which to cool.

PTFE Group provides conveyor belts that provide a cooling surface and can provide a pattern texture (from open mesh) if desired, or a smooth texture (from PTFE coated fiberglass solid fabric). In either case, the PTFE coating provides a non-stick surface that is resistant to both heat and adhesion of the freshly extruded material.

Key Considerations:

  • Operating Temperatures should not exceed 287°C / 550°F for PTFE and 230°C / 446°F for Silicone.
  • Coating Type - Both PTFE and Silicone Coated Fiberglass are used in automotive extrusion.
  • Premium PTFE coated glass is the usual choice to allow maximum release. Silicone-Coated
  • Fiberglass belts are generally used to impart texture onto the hot extrusion before then cooling the product. Occasionally PTFE Coated Fiberglass Mesh is used on the initial cooling zone when a more defined pattern is required on the part before transferring onto a the cooling belt.

Recommended Materials

For conveying and cooling of extrusions, we recommend the following materials: