Rubber Industry

ARPM Rubber Manufacturing Blog

The ARPM Rubber Manufacturing Blog allows members to rapidly communicate with each other. Post both questions and answers to questions that other ARPM members have about any industry topic from material and process issues to R&E Tax Credits and other business issues.

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Rubber Manufacturing Blog / Materials / Sponge extrusion instability
Posted:  26 May 2016 13:59
We are experiencing an issue with trying to extrude EPDM sponge cord (15/16).  We have a 75ft salt bath with cascade and immersion belt.  We have a manually adjustable puller at the end after a rinse tank, incoming laser and belt and 22 l/d screw.  We do not see variability at the laser, but at the other end we see +/-1/8 on the diameter.  Salt has been adjusted from 375F to 405F with many arrangements inside the bath.  We have reformulated as well to adjust the cure rate.  Thanks for your help.