A compact precision extrusion system and method.

摘要

A compact and precision extrusion system and method for extruding strips of rubber compounds with profiles of accurate dimensions. Strips of rubber compound (7) are uniformly heated and mixed in an extruder and then passed through a low pressure drop strainer (19) to remove foreign matter. The strained compound then is fed directly into a gear pump (20) which delivers precise volumes of the rubber compound immediately into the spread chamber of an extrusion head (21) after which it passes through a die to form a precise strip (23) of the rubber compound. The strainer and extrusion head are movably mounted with respect to the gear pump for axial separation from the gear pump for easy removal of the rubber compound from the various components of the system to facilitate compound changes. A control system regulates the speed of the extruder to provide a near constant pressure at the entrance port of the gear pump to precisely regulate the rate of extrusion of the compound from the extrusion head. The extruder preferably includes a feed section (30), a pressure generation section (31), and a mix section (32) which maintain the temperature of the rubber compound below 100 DEG C.