Mauser-werke Gmbh

Stefan Keusch

Frank Schüller

Jan Peter Jacobs

The present invention relates to a method and a device for cleaning extrusion heads () in the extrusion of thermoplastic plastic materials which are ejected or extruded as tubular preform () from an extrusion nozzle (). For removing interfering deposits and cakings () on the discharge nozzle (), according to the present invention the tubular preform () is briefly deflected and upset, wherein the deposits () adhering in a proximate region of the discharge nozzle () are wiped off from the tubular preform () and transported away. Advantageously, the tubular preform () is during its deflection itself used as cleaning element, wherein the cleaning takes place automatically during the continuous operation of the continuous extrusion without interrupting the production process.

Method and device for cleaning an extrusion head

The invention relates to a method and a device for the production of blow-molded two- or multi-layer containers made of thermoplastic, and a plastic container produced accordingly, having view strips, particularly for storage and for transport of contents. To this end, molten plastic material is deflected in an extrusion head () from the inner, natural-colored layer () of the tubular preform () into the outer layer () in a process technical step, and incorporated there, whereby a view strip () is formed in the colored outer plastic layer ().

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Brühl, Germany

Stefan Keusch