Kdesign Gmbh

Klaus Reinhold Maschinen-und Geraetebau Gmbh

Richard Zimmermann

Gerd Fahling

Gerd Kasselmann

Gerd Faehling

Gerd Fähling

A device for guiding a film tube emerging from a film blowing head and drawn off in a production direction, including a frame () through which the film tube () can be passed in the production direction (P), and a plurality of adjusting units () distributed over the circumference for adjusting film guide elements () transversely to the production direction (P), the adjusting units () each having: a pivot arm (), pivotally attached to the frame (), a carrier () for at least one of the film guide elements (), the carrier () being pivotally connected to the pivot arm (), and a coupling rod () pivotably connected to the carrier (). At least one first adjusting unit () has an actuating mechanism () through which the coupling rod () the adjusting unit () is connected in an articulating manner to the frame ().

Device for guiding a film tube

A cooling device for external cooling of a film tube subjected to internal pressure in the production of blown films of thermoplastic material includes a cooling gas ring with a ring housing and a ring nozzle arranged concentrically to a central axis and being open towards the film tube. At least one inner ring channel extending in the circumferential direction about the central axis and being open radially inwards towards the ring nozzle is included. At least one feed channel for supplying cooling gas is attached to the ring housing and connected to the ring channel. The cooling device also includes at least one flow guiding device arranged in the at least one feed channel. When a cooling gas flows through the flow guiding device, at least a partial flow of the cooling gas is set in rotation about a flow axis prior to flowing into the ring channel.

Cooling device with a cooling gas ring and a flow guiding device

A calibration device for calibrating an extruded film tube, above the frost line, forms an annular gap between the calibration device and the film tube. The calibration device includes a plurality of calibration segments and at least one blowing nozzle. The plurality of calibration segments are distributed around a longitudinal axis and form a central feed through opening for feeding through the film tube along the longitudinal axis. The calibration segments are adjustable for adjusting the diameter of the feed through opening. The at least one blowing nozzle for each calibration segment, feeds a calibration gas to the feed through opening. The at least one blowing nozzle is formed such, that the calibration gas is guided to the annular gap substantially parallel to a surface of the film tube and that the calibration gas flows through the annular gap in a single flow direction.

Calibration device for calibrating an extruded film tube

A method of cooling blown film consisting of thermoplastic plastics during the production of blown film by means of a blown film extruder with a film blowing head which comprises an annular nozzle from which the blown film emerges and is guided away in an extraction direction, wherein at least two cooling gas flows are made to approach the blown film from the outside in at least two blowing-out planes located at a distance from the annular nozzle, wherein at least one cooling gas flow Kis blown out in the direction opposed to the extraction direction of the blown film and wherein at least one cooling gas flow Kis blown out in the extraction direction of the blown film, and wherein, at least one of the cooling gas flows K, Kcan be controlled around their circumference in sectors, at least in respect of its volume flow or temperature.

Method of and device for cooling blown film during the production of blown film

A take-off apparatus for plastic blown sheet that is collapsed has a deflecting roller rotatably mounted for transporting the blown sheet and an air turning bar for receiving the blown sheet from the deflecting bar along a transport plane defined therebetween. The blown sheet passes around a peripheral portion of the air turning bar thereby defining a support arc region of the at least one air turning bar about which the blown sheet is supported. The air turning bar has air outlet openings disposed in the support arc region through which compressed air is ejected to support the blown sheet. The air turning bar has an arc-shaped axis defining a plane of curvature which is oriented such that the peripheral portion presents a concave surface in which the air outlet openings are disposed and which opposes the blown sheet.

Growing community of inventors

Bonn, Germany

Richard Zimmermann