PERISTALTIC EXTRUSION PRESS
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Abstract
AN EXTRUSION PRESS WHICH FORCES PLASTIC MATERIAL THROUGH A DIE PLATE BY MEANS OF ONE OR MORE PERISTALTIC PUMPS EACH HAVING A HYDRAULICALLY ACTUATED TUBULAR ELASTOMERIC DIAPHRAGM AS THE PUMPING ELEMENT. THE PERISTALTIC PUMPS ARE USED EITHER SINGLY OR IN SERIES TO FEED MATERIAL DIRECTLY THROUGH A DIE PLATE, OR ARE CONNECTED IN GROUPS OF SERIES-CONNECTED PUMPS TO FEED A PLENUM CHAMBER CONTAINING THE DIE PLATE. PUMP LINING SLEEVES FACILITATE CLEANING AND PROTECT THE DIAPHRAGMS AGAINST CORROSION. PERFORATED PLATES POSITIONED BETWEEN SERIES-CONNECTED PUMPS FACILITATE STRAINING AND MIXING OF THE PLASTIC MATERIAL.
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