Patents Assigned to Berstorff GmbH
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Publication number: 20070262489Abstract: 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: ApplicationFiled: February 27, 2007Publication date: November 15, 2007Applicants: Berstorff GmbH, Krauss-Maffei-Kunststofftechnik GmbHInventors: Gunther Fischbach, Jens Liebhold, Markus Berndt, Rainer Zimmet, Matthias Sieverding
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Publication number: 20070256580Abstract: 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: ApplicationFiled: July 12, 2007Publication date: November 8, 2007Applicant: KraussMaffei Berstorff GMBHInventor: DIETER SCHOPPE
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Patent number: 7290923Abstract: 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: GrantFiled: March 28, 2005Date of Patent: November 6, 2007Assignee: Berstorff GmbHInventors: Florian W. Fischer, Uphus Reinhard
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Publication number: 20070237023Abstract: 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: ApplicationFiled: October 19, 2004Publication date: October 11, 2007Applicants: BERSTORFF GMBH, VMI-AZ EXTRUSION GMBHInventors: Reinhard Uphus, Olaf Skibba
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Patent number: 7128546Abstract: 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: GrantFiled: April 19, 2004Date of Patent: October 31, 2006Assignee: Berstorff GmbHInventors: Siegfried Chszaniecki, Gregor Chszaniecki
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Publication number: 20060112805Abstract: 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: ApplicationFiled: October 11, 2005Publication date: June 1, 2006Applicant: Berstorff GmbHInventors: Gregor Chszaniecki, Matthias Kroll
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Patent number: 7017732Abstract: 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: GrantFiled: December 5, 2002Date of Patent: March 28, 2006Assignee: Berstorff GmbHInventor: Reinhard Uphus
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Patent number: 7011112Abstract: 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: GrantFiled: January 26, 2005Date of Patent: March 14, 2006Assignee: Berstorff GmbHInventor: Gregor Chszaniecki
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Patent number: 6974243Abstract: 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: GrantFiled: March 8, 2002Date of Patent: December 13, 2005Assignee: Berstorff GmbHInventors: Reinhard Uphus, Matthias Nolting
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Patent number: 6974310Abstract: 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: GrantFiled: September 28, 2001Date of Patent: December 13, 2005Assignee: Berstorff GmbHInventor: Reinhard Uphus
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Publication number: 20050230054Abstract: 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: ApplicationFiled: June 13, 2005Publication date: October 20, 2005Applicant: Berstorff GmbHInventors: Gerd Capelle, Georg Reisswig
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Publication number: 20050220919Abstract: 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: ApplicationFiled: March 28, 2005Publication date: October 6, 2005Applicant: Berstorff GmbHInventors: Florian Fischer, Uphus Reinhard
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Publication number: 20050202114Abstract: 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: ApplicationFiled: January 26, 2005Publication date: September 15, 2005Applicant: Berstorff GmbHInventor: Gregor Chszaniecki
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Publication number: 20050189025Abstract: 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: ApplicationFiled: January 26, 2005Publication date: September 1, 2005Applicant: Berstorff GmbHInventor: Gregor Chszaniecki
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Patent number: 6854873Abstract: 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: GrantFiled: May 6, 2002Date of Patent: February 15, 2005Assignee: Berstorff GmbHInventor: Fritz Röthemeyer
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Publication number: 20040253336Abstract: 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: ApplicationFiled: April 19, 2004Publication date: December 16, 2004Applicant: Berstorff GmbHInventors: Siegfried Chszaniecki, Gregor Chszaniecki
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Patent number: 6827477Abstract: 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: GrantFiled: July 30, 2003Date of Patent: December 7, 2004Assignee: Berstorff GmbHInventor: Siegfried Chszaniecki
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Patent number: 6805479Abstract: 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: GrantFiled: May 20, 2002Date of Patent: October 19, 2004Assignee: Berstorff, GmbHInventor: Siegfried Chszaniecki
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Patent number: 6805480Abstract: 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: GrantFiled: June 6, 2002Date of Patent: October 19, 2004Assignee: Berstorff GmbHInventor: Michael Behling
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Publication number: 20040140583Abstract: In a method and apparatus for the continuous production of rubber mixtures, rubber is introduced into a short-screw extruder for subsequent plasticization.Type: ApplicationFiled: January 9, 2004Publication date: July 22, 2004Applicant: BERSTORFF GMBHInventor: Reinhard Uphus