Process of reclaiming rubber and refining reclaimed rubber

• Main Author: MAXWELL; BRYCE
• Format: Patent
• Language: English
• Published: 27.03.1979
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Previously vulcanized rubber to be reclaimed is fed in particulate form (e.g. ground tire stock) together with reclaiming agents to a passageway between an essentially smooth stator and an essentially cylindrical rotor arranged to provide an axial shear zone therebetween in which the rubber is frictionally propelled by the rotor action and subjected at least to the generated pressure and heat and expelled axially through an orifice. The action may be assisted by mixing a suitable amount of previously reclaimed rubber or of unvulcanized rubber with or in advance of the particulate vulcanized rubber, and/or by supplemental heating. In other aspects of the invention, previously-reclaimed previously-vulcanized rubber is similarly fed and acted upon as a substitute for conventional refining operations.