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AssigneeEREMA Engineering Recycling Maschinen und Anlagen Gesellschaft m.b.H.
InventorHelmuth Schulz
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The invention relates to an apparatus for extruding thermoplastic material, comprising an extruder screw (2) which is mounted in a housing (1), comprises a plasticizing section (P) on the inlet side, a degasification section (E) upstream of an outlet section (A), a flow arrester (S) between the plasticizing section (P) and the degasification section (E) with a screw section with a counter-rotating delivery flight (3), and at least one flow channel (5) bridging the flow arrester (S) and containing a melt filter (4). In order to reduce the driving power of the extruder screw (2) it is proposed that a sleeve (7), which encompasses the screw (6) and is mounted in the housing (1) in a rotationally fixed manner, is associated with the screw section that forms the flow arrester (S), and the screw (6) in the screw section of the flow arrester (S) has a smaller screw diameter in relation to the plasticizing section (P) and preferably also to the degasification section (E).
An apparatus for extruding thermoplastic material, comprising an extruder screw which is mounted in a housing, comprises a plasticizing section on the inlet side, a degasification section upstream of an outlet section, a flow arrester between the plasticizing section and the degasification section with a screw section with a counter-rotating delivery flight, and at least one flow channel bridging the flow arrester and containing a melt filter, wherein a sleeve, which encompasses the screw and is mounted in the housing in a rotationally fixed manner, is associated with the screw section that forms the flow arrester, and the screw in the screw section of the flow arrester has a smaller screw diameter in relation to the plasticizing section, and
An apparatus for extruding thermoplastic material, comprising an extruder screw which is mounted in a housing, comprises a plasticizing section on the inlet side, a degasification section upstream of an outlet section, a flow arrester between the plasticizing section and the degasification section with a screw section with a counter-rotating delivery flight, and at least one flow channel bridging the flow arrester and containing a melt filter, wherein a sleeve, which encompasses the screw and is mounted in the housing in a rotationally fixed manner, is associated with the screw section that forms the flow arrester, and the screw in the screw section of the flow arrester has a smaller screw diameter in relation to the plasticizing section, and wherein the extruder screw forms a concurrent delivery flight towards the degasification section between the counter-rotating delivery flight and the opening of the flow channel on the outlet side, and the sleeve comprises at least one degasification opening in the transitional region between the counter-rotating and concurrent delivery flight.
Dependencies are inferred from the claim text.