Patents Assigned to Berstorff GmbH
  • Publication number: 20070262489
    Abstract: Apparatus for producing injection-molded parts, particularly PET preforms, includes a twin-screw extruder or multi-screw extruder for preparing and/or plasticizing material, preferably in granular form, which is transferred to a transfer reservoir. A piston unit further processes the material. The extruder has a plurality of processing zones, whereby at least two process zones are configured as degassing zones.
    Type: Application
    Filed: February 27, 2007
    Publication date: November 15, 2007
    Applicants: Berstorff GmbH, Krauss-Maffei-Kunststofftechnik GmbH
    Inventors: Gunther Fischbach, Jens Liebhold, Markus Berndt, Rainer Zimmet, Matthias Sieverding
  • Publication number: 20070256580
    Abstract: Apparatus for calendering continuously produced articles includes a at least one calender roll and a drive having a driveshaft which is constructed in the form of a cardan shaft and operatively connected to the at least one calender roll for rotating the at least one calender roll. In order to maintain the at least one calender roll at a desired temperature, a fluid passageway means is provided for circulation of a temperature control medium. The temperature control medium is hereby introduced into the driveshaft via a rotary hollow-shaft feedthrough which is constructed for distribution of the temperature control medium. The rotary hollow-shaft feedthrough has a first fluid passageway for providing a passageway to the driveshaft, and a second fluid passageway for providing a passageway for discharge of the temperature control medium.
    Type: Application
    Filed: July 12, 2007
    Publication date: November 8, 2007
    Applicant: KraussMaffei Berstorff GMBH
    Inventor: DIETER SCHOPPE
  • Patent number: 7290923
    Abstract: An extruder/gear pump assembly is provided having an extruder screw connected to the gear pump. The relative speed of the extruder screw and the gear pump are adjustable by the use of a shaft housed in a cavity of the extruder screw.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: November 6, 2007
    Assignee: Berstorff GmbH
    Inventors: Florian W. Fischer, Uphus Reinhard
  • Publication number: 20070237023
    Abstract: The invention relates to a gear pump which is suitable for delivering highly viscous materials. The aim of the invention is to provide a gear pump having a low-wear and low-maintenance bearing system, high output and good self-cleaning properties. For this purpose, the gear pump according to the invention comprises a housing, a gear section comprising a sun wheel and a plurality of stationarily mounted planet wheels, an input screw section comprising an input screw shaft linked with the sun wheel in a rotationally fixed manner and an input transfermix area, and an output screw section comprising an output screw shaft linked with the sun wheel in a rotationally fixed manner and an output transfermix area. The screw shafts, in the transfermix areas, have flight depths that decrease toward the gear section.
    Type: Application
    Filed: October 19, 2004
    Publication date: October 11, 2007
    Applicants: BERSTORFF GMBH, VMI-AZ EXTRUSION GMBH
    Inventors: Reinhard Uphus, Olaf Skibba
  • Patent number: 7128546
    Abstract: An apparatus for granulating extruded material includes an extruder and an underwater granulator connected to the extruder and having a cutting plate for cutting extruded material, the granulator being hinged so that it can swivel about a swivel axis when disconnected from the extruder. A feed pipe is connected to said granulator for providing process water and a discharge pipe is connected to the granulator for transporting and cooling granulate, the feed pipe and the discharge pipe each having a swivel joint with an axis of rotation which is coaxial to the swivel axis.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: October 31, 2006
    Assignee: Berstorff GmbH
    Inventors: Siegfried Chszaniecki, Gregor Chszaniecki
  • Publication number: 20060112805
    Abstract: A drive unit for a granulator, in particular an underwater granulator, includes a rotor that is, or can be, connected to a cutting blade of the granulator. The unit is equipped with an electric motor for driving the rotor and radial bearings for supporting the rotor in a housing, in addition to a device for applying an axial force, which presses the cutting blade against a cutting plate during operation. An axial force is applied in as simple a manner as possible with the least possible wear and tear by using a device for applying an axial force that includes at least one magnetic axial bearing, having a first axial bearing part, which is fixed in the housing of the drive unit, and co-operates with an axial bearing part that is displaceably, mounted in the rotor.
    Type: Application
    Filed: October 11, 2005
    Publication date: June 1, 2006
    Applicant: Berstorff GmbH
    Inventors: Gregor Chszaniecki, Matthias Kroll
  • Patent number: 7017732
    Abstract: The invention concerns a multiple-extruder configuration in which two co-rotating twin-screw extruders and a counter-rotating twin screw extruder are connected to each other with respect to the flow of material.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: March 28, 2006
    Assignee: Berstorff GmbH
    Inventor: Reinhard Uphus
  • Patent number: 7011112
    Abstract: A diverter valve is provided for an extruder, especially a twin-screw extruder, that allows for the replacement of the extruder screws without dismounting the same. The diverter valve includes a valve housing with a first flow passage, which can be fastened indirectly or directly to an extruder cylinder, whereby the valve housing can be arranged on the extruder cylinder with the first flow passage aligned with the screw area. The cross section of the first flow passage is constructed large enough to pass extruder screws arranged in the extruder through the flow passage.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: March 14, 2006
    Assignee: Berstorff GmbH
    Inventor: Gregor Chszaniecki
  • Patent number: 6974243
    Abstract: A screw element includes an outer radius Ra and a core radius Ri for multiscrew extruders with co-rotating and intermeshing screw shafts. The screw element has in axial cross section through its longitudinal axis a profile which has at each of the two axial end faces (i.e. a front end face and a rear end face) only one screw flight corresponding to a conventional single-start screw element for intermeshing screw shafts. In this case, the width (flight land angle ?) of the screw flight and conversely, in a corresponding way, the width (flight land angle ?) of the screw flight are formed in a special way and a shearing flight with a constant shearing flight radius Rs, which is greater than Ri, and less than Ra, is provided.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: December 13, 2005
    Assignee: Berstorff GmbH
    Inventors: Reinhard Uphus, Matthias Nolting
  • Patent number: 6974310
    Abstract: A screw extruder and gear pump arrangement for highly viscous media includes a screw shaft and a gear pump operatively coupled to the screw shaft. A planet carrier is operatively engaged with at least one rotatably mounted planet gear, a first functional element that is cooperatively engaged with planet gear as a sun wheel, and a second functional element that is cooperatively engaged with the planet gear as an outer ring. One of the first functional element or the second functional element includes gear teeth for meshing with the planet gear and the other includes a sealing region for bearing in a sliding and sealing manner over part of the circumference and length of the planet gear. A pump casing surrounds the planet carrier.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: December 13, 2005
    Assignee: Berstorff GmbH
    Inventor: Reinhard Uphus
  • Publication number: 20050230054
    Abstract: A calendering system, especially for producing webs of steel cable carcass, comprises two extruders for feeding plasticized material, a device for delivering steel cables, a calender that is provided with two pairs of rollers which rotate in opposite directions, each of said pairs encompassing a working roller and a sheeting roller. The calendering system further includes slot dies which are disposed between the extruders and the pairs of rollers and extend into sheeting gaps located between the pairs of rollers. A working gap is embodied between the working rollers so as to receive calendered webs released by the pairs of rollers and the steel cables fed by the steel cable delivering device as well as to discharge the web of steel cable carcass.
    Type: Application
    Filed: June 13, 2005
    Publication date: October 20, 2005
    Applicant: Berstorff GmbH
    Inventors: Gerd Capelle, Georg Reisswig
  • Publication number: 20050220919
    Abstract: An extruder/gear pump assembly is provided having an extruder screw connected to the gear pump. The relative speed of the extruder screw and the gear pump are adjustable by the use of a shaft housed in a cavity of the extruder screw.
    Type: Application
    Filed: March 28, 2005
    Publication date: October 6, 2005
    Applicant: Berstorff GmbH
    Inventors: Florian Fischer, Uphus Reinhard
  • Publication number: 20050202114
    Abstract: A granulating device is provided, especially one used to produce plastic granulates, having a screen device that contains a housing and at least one flow passage and can be connected to an extruder, and a granulator that is arranged downstream from the flow direction of the screen device. To obtain quick disassembly and assembly of the extruder screws, the granulator is removable from the screen device, especially by being pivoted away from it. The screen device is designed such that in the operating and assembly states of the screen device, an opening that is arranged coaxially to the extruder screws can be produced in the screen device through which the extruder screw or screws can be removed completely from the extruder cylinder.
    Type: Application
    Filed: January 26, 2005
    Publication date: September 15, 2005
    Applicant: Berstorff GmbH
    Inventor: Gregor Chszaniecki
  • Publication number: 20050189025
    Abstract: A diverter valve is provided for an extruder, especially a twin-screw extruder, that allows for the replacement of the extruder screws without dismounting the same. The diverter valve includes a valve housing with a first flow passage, which can be fastened indirectly or directly to an extruder cylinder, whereby the valve housing can be arranged on the extruder cylinder with the first flow passage aligned with the screw area. The cross section of the first flow passage is constructed large enough to pass extruder screws arranged in the extruder through the flow passage.
    Type: Application
    Filed: January 26, 2005
    Publication date: September 1, 2005
    Applicant: Berstorff GmbH
    Inventor: Gregor Chszaniecki
  • Patent number: 6854873
    Abstract: The invention relates to an extruder for the preparation of rubber mixtures for elastomeric products and comprises a cylinder, an endless screw rotatably mounted in the cylinder for uptake transport and homogenization of the rubber mixture, and an extrusion tool; wherein the endless screw is configured with zones of multiple treads in dependence of varying helix angle and depth of thread so that the rubber mixture transported through the zones undergoes a temperature increase through heat dissipation to such an extent that the temperature of the extrudate approaches the vulcanization temperature thereof.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: February 15, 2005
    Assignee: Berstorff GmbH
    Inventor: Fritz Röthemeyer
  • Publication number: 20040253336
    Abstract: An extruder includes a barrel having at least one axial bore extending to a downstream end of the barrel, a cutting plate of a granulating unit, received against a contact surface at the downstream end, and a plurality of heating elements in the barrel in the immediate vicinity of the contact surface. The heating elements are preferably heating cartridges which are received in two pairs of parallel bores at right angles to each other, thereby forming a square in a plane transverse to the axial bore.
    Type: Application
    Filed: April 19, 2004
    Publication date: December 16, 2004
    Applicant: Berstorff GmbH
    Inventors: Siegfried Chszaniecki, Gregor Chszaniecki
  • Patent number: 6827477
    Abstract: The invention relates to a compounder comprising a mixing unit, which can be mechanically driven by a drive module and is provided with one or more feed devices (5) for the material to be processed and one or more additives that are to be mixed with this material. The mixing unit is located in a supporting frame configured as a three-dimensional framework, and the supply and discharge lines required to operate the mixing unit, for the material being processed, and auxiliary materials or operational materials and energy as well as for the measurement, control and regulation technologies are substantially completely installed in or on the supporting frame and are connected to the mixing unit. The supporting frame is configured both as a transport frame for transporting the compounder to the job site and as a mounting frame for the placement of the operational compounder on a substructure at the job site.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: December 7, 2004
    Assignee: Berstorff GmbH
    Inventor: Siegfried Chszaniecki
  • Patent number: 6805479
    Abstract: At least one screw of a screw-type extruder drive-connected via a coupling to a gearing that is driven by a motor, the coupling being able to be coupled to and decoupled from the screw. A gearing carriage is provided which is configured such that the gearing can be drawn by a short distance on the gearing carriage in the direction of the longitudinal axis of the screw in order to decouple the coupling, and which gearing carriage can be swiveled or can move transverse to the longitudinal axis of the screw. The gearing with the coupling can be moved away from the screw to such an extent that the screw can then be withdrawn completely from the extruder counter to the feed direction of the screw, and a screw-changing device is provided by which the existing screw of the extruder can be received and can be replaced by another screw located in the screw-changing device.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: October 19, 2004
    Assignee: Berstorff, GmbH
    Inventor: Siegfried Chszaniecki
  • Patent number: 6805480
    Abstract: A cylinder assembly for a twin-screw extruder includes a cylinder forming an extrusion space and a hollow-cylinder mantle surrounding the cylinder and having a smooth inner surface. At least one channel is made in the shape of a helix in the longitudinal direction on the outside of the cylinder. The at least one channel is connected to an intake and outlet for conducting a tempering medium. The at least one channel is made by a winding-vortex process and the at least one channel is closed by the hollow-cylinder mantle. The cycle depth of the at least one channel in the radial direction changes over the circumference of the cylinder such that it is greatest in regions where the original wall thickness of the cylinder is greatest, and that it is smallest in the regions where the original wall thickness of the cylinder is also smallest.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: October 19, 2004
    Assignee: Berstorff GmbH
    Inventor: Michael Behling
  • Publication number: 20040140583
    Abstract: In a method and apparatus for the continuous production of rubber mixtures, rubber is introduced into a short-screw extruder for subsequent plasticization.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 22, 2004
    Applicant: BERSTORFF GMBH
    Inventor: Reinhard Uphus