Hermann Berstorff Maschinenbau Gmbh

Kraussmaffei Berstorff Gmbh

Berstorff Gmbh

Kraussmaffei Extrusion Gmbh

Harald Hepke

Frank Reineke

Klaus Hahn

Uwe Kr&ouml;ger

Joachim Brodmann

The invention relates to a hose extrusion head for producing a hose (), said head comprising a head housing, a duct () formed in the head housing () for supplying a hose material (), a pin () which is arranged in the duct (), a die () and at least one securing element (). According to the invention, the securing element () is attached by one end () to the die () such that said end () follows the movement of the die ().

Hose extrusion head and method for producing a hose

The invention relates to a multiple extrusion press head for producing tread profiles of tyres, comprising: a base body () having a first supply opening () for connecting a first extruder, a second supply opening () for connecting a second extruder, a third supply opening () for connecting a third extruder, and a fourth supply opening for connecting a fourth extruder; a first head part () which is mounted such that it can swivel in relation to the base body, and which has a receiving means () that is open in the direction of the base body (); a second head part that is mounted such that it can swivel in relation to the base body (); at least one flow channel insert () that is mounted such that it can swivel in relation to the base body (), wherein the first head part () and the second head part () can be brought into a closed state, in which the head parts () are connected to one another in a pressure-tight manner, and a first flow channel (), a second flow channel (), a third flow channel () and a fourth flow channel () are formed in the multiple extrusion press head (), wherein every flow channel is connected to a supply opening. According to the invention, the base body () has a fifth supply opening () for connecting a fifth extruder, and the multiple extrusion press head () has a second flow channel insert (), which, independently of the first flow channel insert (), is mounted such that it can swivel in relation to the base body (), and borders a fifth flow channel () that is connected to the fifth supply opening ().

Multiple extrusion press head

The invention relates to a cutting machine, in particular a tread cutting machine, having at least one cutting blade ( ) linearly traversable on a blade carriage ( ) for achieving a feed movement and rotationally driven by a motor ( ), the motor ( ) for the drive of the cutting blade ( ) being arranged outside the blade carriage ( ), and a torque-transmission means, which comprises a means for transmitting tensile forces, being provided between the motor ( ) and the cutting blade ( ), and that part of the torque-transmission means which is traversable with the blade carriage ( ) having a markedly lower mass than the motor ( ). In this case, the motor ( ) is provided with a device which is designed as a closed-loop control or an open-loop control and is intended for keeping the rotational speed of the cutting blade ( ) at least approximately constant during a feed movement of the cutting blade ( ).

Cutting machine with rotating cutting blade

The invention relates to a gear extruder for plasticizing and homogenizing rubber mixtures, having at least two gears disposed in chambers in the extruder housing, with the teeth of the gears meshing with one another, and having a port for feeding the rubber mixture to the front of the gears in the extruder housing. The invention is characterized in that gas vent ports are provided in the extruder housing, at the ends of the teeth of the gears, in an area in which the teeth disengage, and/or that at the entrance side of the teeth filled with the rubber mixture. The gas vent ports are provided in the extruder housing in one embodiment so that they extend on the entrance side over no more than half of the circumference of the chambers. By such an arrangement of gas vent ports it has become possible to ventilate a rubber mixture such that volatile components and moisture contained therein can be outgassed, but the rubber mixture is unable to enter the gas vent ports and clog them.

Growing community of inventors

Hannover, Germany

Harald Hepke