Sequential Co-Extrusion & All Extruded Products
This method combines 3-D blow molding with sequential co-extrusion, and consists of extruding two different materials (e.g., a rigid polyolefin with a soft thermoplastic vulcanizate). Coi Rubber has the perfect method to provided you with extruded products which will meet your application and demand.
Using this example, the soft thermoplastic vulcanizate would be extruded, followed by the rigid polyolefin, followed again by the soft thermoplastic vulcanizate. This allows a parison with different sections of material in the extrusion direction to be produced. This process is also commonly referred to as a “hard-soft-hard” process.
An inclined clamp is moved in coordinates while the parison, that has a smaller diameter than the article diameter, is placed into the mold cavity in such a way that the remaining pinch line length is reduced to a minimum. Then the mold is closed and the parison is inflated onto the cooled walls of the mold where the plastic cools down, solidifies, and sets the part shape. Finally the mold is opened and the part removed.
Vorteile dieses Verfahrens
- Erhebliche Einsparungen (Material, Energie, Kapital, Zykluszeiten usw.) sind möglich.
- Der Flash ist deutlich reduziert und lässt sich leicht entfernen.
- Teile mit sehr komplexen Formen lassen sich formen.
- Die Klemmeinwirkungen werden reduziert.
- Die Nachbearbeitung des Außendurchmessers des Artikels entfällt.
- Verbesserte Qualität durch eine konsistenteren Verteilung der Wandstärke und die Beseitigung schwacher Stellen in den Stecklinien.
- Man kann kleinere Extrudermaschinen verwenden oder größere Teile formen.
- Bei der Mahlung oder dem Recycling von Fluff wird weniger Energie verbraucht.
- Weniger Abbau empfindlicher Materialien.
- Doppelfachextrusion aus verschiedenen Materialien, die spezifische physikalische Eigenschaften bietet.
- Teile mit unterschiedlicher Flexibilität bzw. Steifigkeit in gewünschten Abschnitten sind möglich.
Gummi-Extrusion / Randverklebung
We are experts in u-channel extrusions, and we specialize in supplying extruded rubber shapes, extruded rubber seals and extruded rubber profiles. We also stock rubber extrusion for many applications. The standard profiles include U-Channels, P-profiles and other unique shapes. Common uses for rubber extrusion are sealing, noise control, vibration control and decorative trim. The elastomers used in our standard rubber extrusions are either weather resistant EPDM or SBR. Silicone, Neoprene, Viton and Buna-N are also available if your unique application requires a higher level of performance. Custom compounds and profiles are our specialty.
Extruding Rubber Sponge
Extruding Rubber Solids
Extruding Rubber Dual Durometer
– Wire Carrier
– Clip Carrier
-HAT (heat activated tapes)
3M
China generic
Extrusions custom shapes and Secondary processes
KITTING