Patent ID: 6491510
Filing Date: 2002-12-10
Classification: B29C

Abstract:
An extrusion apparatus having an extruder flow channel for a extruder head forming simultaneously one or more elastomeric strips of predetermined cross-sectional profiles, the extruder flow channel comprising:a flow inlet end of a predetermined cross-sectional area Ai; a first and a second flow passage communicating with the flow inlet end and each passage having a flow outlet end of a predetermined cross-sectional area Aa; a flow dam interposed between and separating the first flow passage and the second flow passage, the flow dam having a flow splitter end in proximity to the inlet end; a pair of weirs, a first weir being located in the first flow passage in proximity to the first outlet end, a second weir being located in the second flow passage in proximity to the second outlet end, each first and second weir having a mass flow diverter at a leading end of the weir, wherein each mass flow diverter is movable relative to the flow path within the passage.