US 12,434,420 B2
Plant for producing a coextruded multi-layer film, apparatus for coextruding a multilayered coextrusion composite and method for coextruding and also method for operating a plant and/or apparatus for this purpose
Peter Siebigteroth, Eitorf (DE)
Assigned to REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK, Troisdorf (DE)
Appl. No. 17/769,174
Filed by REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK, Troisdorf (DE)
PCT Filed Oct. 15, 2020, PCT No. PCT/DE2020/200088
§ 371(c)(1), (2) Date Apr. 14, 2022,
PCT Pub. No. WO2021/073698, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 10 2019 127 777.9 (DE), filed on Oct. 15, 2019.
Prior Publication US 2023/0347569 A1, Nov. 2, 2023
Int. Cl. B29C 48/92 (2019.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/21 (2019.01); B29C 48/25 (2019.01); B29C 48/31 (2019.01)
CPC B29C 48/92 (2019.02) [B29C 48/0019 (2019.02); B29C 48/08 (2019.02); B29C 48/21 (2019.02); B29C 48/2528 (2019.02); B29C 48/31 (2019.02); B29C 2948/92152 (2019.02); B29C 2948/92428 (2019.02); B29C 2948/92438 (2019.02); B29C 2948/92647 (2019.02)] 5 Claims
OG exemplary drawing
 
1. Apparatus (10) for coextruding a multilayer coextrusion composite (3) comprising:
interconnected individual layers (5, 6) of thermoplastic materials, having a coextrusion adapter (12) which has a central channel (40) for producing a central layer (5) of the coextrusion composite (3), at least one coextrusion channel (42) for producing at least one further layer (6) of the coextrusion composite (3) interacting with the central layer (5),
a plurality of displaceable adjusting elements (47), each comprising a rotatable member mounted in a threaded bore, for adjusting layer thicknesses (50) or layer thickness profiles of the individual layers (5, 6) of the coextrusion composite (3) and
adjusting devices (53), each comprising a drive-side engagement structure (55) configured to receive a tool for actuating the adjusting elements (47), and with a nozzle part (33) through which the multilayer coextrusion composite (3) is discharged,
wherein a measuring device (24), positioned downstream of the nozzle part (33), configured to automatically measure the layer thicknesses (50) or the layer thickness profiles of the multilayer coextrusion composite (3) is arranged downstream of the nozzle part (33),
wherein the apparatus (10) being set up to manipulate the plurality of displaceable adjusting elements (47) automatically by means of measurement data obtained from the measuring device (24),
wherein the apparatus further includes an actuator (58) being located at a distance (62) of more than 50 mm from the coextrusion adapter (12), and
wherein a flexible, thermally conductive coupling element (66) is arranged between an input-side drive element (55) of an adjusting device (53) and an output-side output element (65) of the actuator (58).