US 12,151,405 B2
Plasticizing unit including a plasticizing screw rotationally and linearly movable within an injection cylinder and having a dam element
Guenther Klammer, Aschbach Markt (AT); Thomas Koepplmayr, Marchtrenk (AT); Gerhard Baeck, Schwertberg (AT); Raffael Johannes Rathner, Scharnstein (AT); and Klaus Fellner, Steyr (AT)
Assigned to ENGEL AUSTRIA GMBH, Schwertberg (AT)
Filed by ENGEL AUSTRIA GmbH, Schwertberg (AT)
Filed on Jun. 28, 2023, as Appl. No. 18/215,557.
Claims priority of application No. A 50509/2022 (AT), filed on Jul. 11, 2022.
Prior Publication US 2024/0009889 A1, Jan. 11, 2024
Int. Cl. B29B 7/42 (2006.01); B29B 7/72 (2006.01); B29B 7/80 (2006.01)
CPC B29B 7/423 (2013.01) [B29B 7/428 (2013.01); B29B 7/72 (2013.01); B29B 7/801 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A plasticizing unit for a molding machine, the plasticizing unit comprising:
an injection cylinder having a dispensing opening to dispense a plasticized material; and
a plasticizing screw arranged in the injection cylinder, the plasticizing screw being rotationally movable and linearly movable in the injection cylinder by a drive unit configured to linearly move the plasticizing screw over an injection stroke length during an injection movement, the plasticizing screw having an axis of rotation,
wherein a plasticizing zone is located between the plasticizing screw and the injection cylinder in the radial direction relative to the axis of rotation of the plasticizing screw,
wherein the plasticizing screw has a dam element, and the injection cylinder has a first opening in the area of the plasticizing zone and/or the dam element and has a second opening between the dam element and the dispensing opening, and
wherein the first opening and the second opening are spaced apart a distance from each other, the distance corresponding to the injection stroke length.