Windmoller Holscher

Windmoeller & Hoelscher Kg

Jurgen Linkies

Dieter Aus Dem Moore

Klemens Sensen

Fritz Achelpohl

Frank Bosse

Hans-Udo Beckmann

Gerhard Winkler

Ulrich Krause

Hermann Tupker

Egon Kotter

Reinmut Rewwer

A device to lay flat a film tube drawn from an inflated film bubble generated in a film blowing system includes lay-flat platens which delimit the film bubble and which are placed against the bubble in the form of a wedge. The platens are positioned in front of the squeeze rollers of a film take-up and winding device and have slip elements arranged transversely relative to the take-up device. A driven reversing frame can be provided to hold the lay-flat platens, support the squeeze rollers, and support guide rollers and turning bars about its rotating axis in a pivoting fashion. In order to decrease the friction between the film tube which is to be laid flat and the lay-flat platens, particularly for a reversing take-up, the slip elements have hollow sections including air blast nozzles or air blast slots facing the film tube to be laid flat. The hollow sections can be connected by lines to an air blast source.

Device to lay flat a film tube

A withdrawal device for a plastic tubular film is manufactured in a blowing method by an extruder. To prevent the formation of center wrinkles in the withdrawal of plastic tubular film, at least one deflection cylinder and/or angle bar has a differing diameter across its length.

Withdrawal device for a blown tubular film

An extrusion die for a blow head for making blown plastic films comprises inner and outer rings, which are made of a ferrous material, particularly steel, and define between them an annular orifice. Those surfaces of the inner and outer rings which define the die orifice are covered by a layer consisting of a metallic material having a higher thermal conductivity than steel.

Extrusion die for a blow head for making blown plastic films

Growing community of inventors

Lienen, Germany

Jurgen Linkies