METHOD FOR MANAGING THE OPERATION OF AN EXTRUDER FOLLOWING A SHUTDOWN OF THIS EXTRUDER

Reversing the extruded product direction with profiling rollers remixes and reheats the junction zone, addressing breakage issues and enhancing restart efficiency in extruders producing rubber strips for tire manufacturing.

FR3162382B1Active Publication Date: 2026-05-22MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
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Patent Information

Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
Filing Date
2024-05-23
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Extruders producing rubber strips for tire manufacturing experience weakening and potential breakage at the junction zone between the inside and outside due to temperature differences and stress release during shutdowns, leading to inefficiencies and productivity losses.

Method used

A method where the extruder reverses the direction of a non-zero length of the extruded product just before resuming operation, using profiling rollers to remix and reheat the junction zone, ensuring mechanical characteristics are restored and minimizing breakage risks.

Benefits of technology

Prevents breakage during restart, enhances acceleration to nominal operating speed, and increases productivity by maintaining mechanical integrity and temperature consistency at the junction zone.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a method for managing the operation of an extruder, the extruder generating an extruded product in the form of a strip, the extruder comprising a hollow body and at least one extrusion screw mounted in this hollow body, the extruder comprising two profiling rollers for the extruded product, the two profiling rollers being mounted at the outlet of the hollow body of the extruder so that the extruded product circulates between the two profiling rollers, the two profiling rollers enabling the extruded product to be driven in a production direction when the extruder is operating in production mode and delivering the extruded product continuously in the form of a strip.The management process stipulates that, during a shutdown of the extruder and just before resuming production, a non-zero length of the extruded product is conveyed in the opposite direction to the production direction by rotating the profiling rollers in the opposite direction to the direction in which they convey the extruded product in the production direction. Figure in the abstract: None.
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