US3870285A - Continuously operating kneading and mixing screw device for kneading and mixing kneadable and mixable materials - Google Patents

Continuously operating kneading and mixing screw device for kneading and mixing kneadable and mixable materials Download PDF

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Publication number
US3870285A
US3870285A US393838A US39383873A US3870285A US 3870285 A US3870285 A US 3870285A US 393838 A US393838 A US 393838A US 39383873 A US39383873 A US 39383873A US 3870285 A US3870285 A US 3870285A
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Prior art keywords
elements
mixing
shaft
kneading
housing
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Expired - Lifetime
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US393838A
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English (en)
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Gunther Bausch
Christian Millauer
Harald Paul
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Werner and Pfleiderer GmbH
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Werner and Pfleiderer GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/422—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw sections co-operating, e.g. intermeshing, with elements on the wall of the surrounding casing
    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21C—MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH
    • A21C1/00—Mixing or kneading machines for the preparation of dough
    • A21C1/06—Mixing or kneading machines for the preparation of dough with horizontally-mounted mixing or kneading tools; Worm or screw mixers
    • A21C1/065—Worm or screw mixers, e.g. with consecutive mixing receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/575—Screws provided with elements of a generally circular cross-section for shearing the melt, i.e. shear-ring elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
    • B29C48/687—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having projections with a short length in the barrel direction, e.g. pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1143—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections screw-shaped, e.g. worms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands

Definitions

  • the invention relates to a continuously operating kneading and mixing device, and particularly to a kneading and mixing device of the type including a power driven shaft rotatably mounted in a housing and mounting interrupted screw flights and mixing elements extending from the wall of the housing into the spaces defined by the interruption of the screw flights.
  • BACKGROUND Continually operating kneading and mixing screw devices of the general kind above referred to are widely used for processing soft plastics, such as elastic, pulverized and liquid materials. They are employed, for instance, in the synthetic plastic industry and the rubber industry; they are also employed in connection with the manufacture of electrodes, preparation of molding sand and in connection with the manufacture of various food products.
  • kneading and mixing devices which comprise a rotating and simultaneously axially reciprocating screw which consists of screw flights of screw segments mounted spaced apart on a drive shaft.
  • Devices of this type are disclosed in published German Pat. application No. 1,241,417 and U.S. Pat. No. 3,458,894.
  • Devices of this type further comprise tooth-like kneading members mounted in the housing for the screw for coaction with the interrupted screw flights so that with each revolution of the screw the kneading members enter into interruptions between the flights whereby portions of the material to be treated are pushed into the adjacent screw thread.
  • a more specific object of the invention is to provide a novel and improved kneading and mixing device of the general kind above referred to which is highly reliable and permits adjustment of the mixing intensity within a wide range and without causing substantial changes in the output of the device.
  • the invention further provides that several kneading or mixing elements are disposed within the housing of the device in a common plane normal to the axis of the screw shaft and arranged to be jointly adjusted by a common adjustable drive. Such an arrangement greatly facilitates adaptation of the device to specific operating conditions.
  • the adjustment of the elements of such devices is simplified and thus made less expensive by providing several groups of elements in axially spaced planes normal to the axis of the screw shaft and controllable by adjustment of a common drive for the elements in all the groups.
  • the device according to the invention also provides a simple and highly efficient control of the power input necessary to effect mixing.
  • the kneading and mixing elements are in the form of annular segments which are tapered towards the axis of the screw shaft and have at their ends facing this shaft a concavely and spherically curved surface. This surface coacts with a eonvexly and spherically curved outer surface on the portion of the screw shaft which faces the elements.
  • a very high flow-throttling or resistance effect can be obtained according to the invention by parallel arrangement of all the kneading and mixing elements disposed in a common plane. More specifically, the elements are so arranged that they can be jointly turned through into a position of maximal through-flow resistance or into a position of minimal flow resistance.
  • a particularly intimate mixing action can be obtained by providing a rotary drive for the mixing and kneading elements.
  • the invention also provides that several kneading and mixing elements are disposed circumferentially spaced in a plane normal to the axis of the screw shaft and turnable by a rotary drive common to all the elements in said plane.
  • the advantages obtained with a device according to the invention reside, among others, in that .the mixing action is very considerably increased by simple and inexpensive means and simultaneously the operational reliability of the device is improved. Moreover, by the possibility of changing the mixing action very accurately and continually, automated control of the mixing operation can be readily designed. Furthermore, the dwell time of the different materials to be mixed within the device can be changed within wide limits without unfavorably affecting the output of the device or downgrading the mixing operation.
  • FIG. 1 is a diagrammatic plan view of a screw-type kneading and mixing device according to the invention
  • FIG. 2 is a fragmentary longitudinal section of the device according to FIG. 1, the left-hand mixing elements being turned through 90;
  • FIG. 3 is a section taken on line IIIIII of the device according to FIG. 2;
  • FIG. 4 is a section taken on line IV-IV of the device of FIG. 2;
  • FIGS. 5A-5D show several exemplifications of mixing elements as seen in the direction of arrow V in FIG.
  • FIG. 6 is a fragmentary longitudinal section of a modification of a screw-type kneading and mixing device according to the invention.
  • FIG. 7 is a section taken on line VII-VII of the device according to FIG. 6;
  • FIG. 8 is a section taken on line VIIIVIII of the device according to FIG. 6;
  • FIG. 9 is a plan development of a screw with different types of mixing elements for use with the device according to FIG. 6.
  • the screw-type kneading and mixing device as shown in FIG. 1 comprises a housing 1 which is composed of suitably joined sections Ia-le. Section 1e mounts a funnel or hopper 2 for feeding the material to be treated into the housing. As can be seen in the plan view of FIG. 1, the operating of hopper 2 displays part of a screw or mixing shaft 4 mounting screw turns or flights 3. Housing sections lb and Id accommodate kneading and mixing elements 5, only shaft 5a being visible in the figure. The shaft is coupled to one end ofa link 6, the other end of which mounts pin 7 engaging an elongate slot 8 ofa setting ring 9 as can best be seen in FIG. 2. As there are two sets of mixing elements 5, two such rings 9 are provided.
  • the rings are coupled via rods 10 to a suitable common setting device which is shown by way of example as comprising hydraulic cylinders 12 in which pistons 13 mounted on rods 10 are displaceable in either direction.
  • a suitable common setting device which is shown by way of example as comprising hydraulic cylinders 12 in which pistons 13 mounted on rods 10 are displaceable in either direction.
  • Various other types of conventional setting devices can, of course, be uses and if frequent setting of the mixing elements is not operationally required, adjustment can be manually effected, e.g., by a hand wheel.
  • Housing section 10 which is in the middle of the housing, includes a degassing port 14.
  • the housing section la which includes the discharge end of mixing shaft 4,
  • FIG. 2 mounts a head member 15 supporting an extrusion die- 16 (FIG. 2) through which is discharged the material as it is pressed out in the form of strands with a selected profile.
  • the mixing shaft and the mixing elements are more clearly shown in FIG. 2.
  • the screw turns or flights 3 on the mixing shaft 4 in the exemplification a three-gang or triple-threaded screw is shown are interrupted within the mixing zone 17 by mixing elements 5 extending into this zone.
  • the mixing shaft 4 mounts in zone 17 circumferential protrusions 18 with convexly spherically curved outer surfaces.
  • the effective part of the mixing elements 5 has the shape of an annular segment with a cross-sectional outline which is tapered or wedge-shaped towards the axis of the screw shaft.
  • the inner surface of the segment is concavely spherically curved (See FIGS.
  • the mixing elements are joined to their shaft 5a by a generally disc-shaped flange 5b to avoid dead corners, i.e., space areas in which there is very little or even no conveyance of material.
  • Shaft 5a is journalled in a bearing sleeve I9 which is screwed into housing section 117.
  • the bearing sleeve is sealed by a bushing 20 with sealing rings or other sealing means 21.
  • a sealing ring 22 prevents leakage of the material between bearing sleeve 19 and a bore in the housing in which this sleeve is received.
  • FIG. 2 designate the same components as corresponding reference numerals in FIG. 1.
  • All mixing elements 5 which are disposed in one plane normal to the axis of the mixing shaft are jointly driven via the setting rings 9, or retained in their angular position.
  • the mixing elements are normally parallel one to another and offer minimal flow resistance for material to be processed in the positions shown in FIG. 2 at the left and in the position shown in FIG. 3. While in the positions shown in FIG. 2 on the right side and in FIG. 4 the mixing elements offer maximal throttling.
  • the configuration of the mixing elements (see FIGS. 5A-5D) the flow of material can be completely stopped in the last referred-to-position.
  • the mixing elements are parallel in plane III-III to those in plane IVIV or normal to those in plane IV-IV or in any selected angular position intermediate the right angle position and the parallel position.
  • FIGS. 3 and 4 have the afore-indicated significance.
  • shaft 4 there is shown in shaft 4 a central bore 24b through which a liquid or gaseous temperature controlling medium can be circulated.
  • Fastening means such as tensioned anchor or screw bolts 25 hold together the housing and intermediate sections 1a le.
  • FIGS. 5A-5D show various embodiments of kneading and elements 5 as seen from the lengthwise axis of the elements, i.e., in the direction of arrow V in FIG. 4. There is shown in disc-shaped flange or protrusion 5b a concave ball-shaped inner surface 5c and intermediate flanges or protrusions 5d and 5e.
  • the drive for the mixing device according to FIGS. 1 to 5 via the rods and a hydraulic cylinder is particularly suitable for more or less periodic reciprocating setting of the mixing elements. If required, the mixing elements can also be locked in a selected position.
  • Such adjustable drive constitutes a convenient basis for providing automatic control of the mixing operation.
  • the mixing device as shown in FIG. 6 is suitable for automatic control of the mixing operation but it is preferably used when a particularly intensive mixing and kneading action are desired.
  • kneading and mixing elements 5' which are rotatably mounted in intermediate housing section lb, are set by means of a rotary drive which is independent of the drive for shaft 4.
  • Three elements are mounted in the housing in a plane VII-VII which is normal to the axis of the mixing shaft at equal angular spacing (See also FIG. 7).
  • the shafts 5a for the mixing elements mount conical toothed sectors 26 which are jointly driven by a large level gear 27 which is journalled by means of a suitable bearing 28 such as a sliding bearing on housing section 1b.
  • Bevel gear 27, in addition to its inner teeth, has outer teeth by means of which it is driven via a pinion 29 by an electric motor 30 mounted on housing section 1c.
  • a rotary drive is particularly suitable as shown in the plane VIllVIll of FIG. 6 and in FIG. 8.
  • the shaft is driven via a coupling 31 by an electric motor 32 which, in turn, is mounted via a bracket 33 and a spacer 34 on housing section 1d.
  • Other reference numerals used in FIGS. 6 to 8 have the same significance as previously described but are primed to indicate modifications.
  • FIG. 9 shows a development of part of a screw or mixing shaft with flights 3 and screw threads 4b.
  • elements 5 for use with mixing device according to FIGS. 6 to 8.
  • a projection of the active part of elements at a right angle to the axis of the mixing shaft.
  • Such mixing action is also obtained when the mixing elements are held in a fixed position and, or course, it is also affected by the shape of the elements and the angular positions thereof. With rotating mixing elements, the mixing action depends largely on the rotational speed of the mixing elements.
  • the elements as shown at 9.1, 9.5, 9.6 and 9.7 are particularly suitable for a rotary drive.
  • the magnitude of the volume of material as gripped by the mixing elements does not only depend on the afore-referred to parameters but also on the rotational speed and the number of flight threads on the screw shaft.
  • a power driven shaft rotatably mounted in said housing and mounting screw flights, said flights being interrupted to define spaces therebetween; kneading and mixing elements extending from the inside of the housing into said spaces between the 5 flights, said elements being disposed in circumferentially spaced relationship and arranged in groups, each of said groups being located in a plane normal to the center axis of said shaft;
  • drive means coacting with said elements for turning the same independently of rotation of said shaft, said drive means being coupled to the elements in said groups for joined turning of the elements, said drive means being adjustable for controlling the angular positions of the elements in said groups.
  • said drive means comprises a setting ring encompassing and turnable about the outside of said housing and linking means coupling said ring with said elements, turning of said ring causing a corresponding turning of the elements coupled to said ring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US393838A 1972-09-01 1973-09-04 Continuously operating kneading and mixing screw device for kneading and mixing kneadable and mixable materials Expired - Lifetime US3870285A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2243039A DE2243039C3 (de) 1972-09-01 1972-09-01 Kontinuierlich arbeitender Schnekkenknetmischer

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JP (1) JPS542930B2 (enrdf_load_html_response)
CH (1) CH555734A (enrdf_load_html_response)
DE (1) DE2243039C3 (enrdf_load_html_response)
FR (1) FR2197635B3 (enrdf_load_html_response)
GB (1) GB1396843A (enrdf_load_html_response)
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0116773A1 (en) * 1983-01-13 1984-08-29 The Uniroyal Goodrich Tire Company Controlled shear cold-feed mixer/extruder
US4538917A (en) * 1981-12-22 1985-09-03 Uniroyal Englebert Reifen Gmbh Screw extruder
US4964729A (en) * 1988-06-10 1990-10-23 Rcm Rubber Consulting & Machinery Extruding device
US5145251A (en) * 1988-05-17 1992-09-08 The Japan Steel Works, Ltd. Extruder having degree-of-kneading adjusting device
US5190771A (en) * 1990-04-20 1993-03-02 Kraftanlagen Ag Screw extruder
US5219589A (en) * 1992-01-22 1993-06-15 Bridgestone/Firestone, Inc. Vented kneading pin for extruder
US5362146A (en) * 1991-06-03 1994-11-08 Friedrich Theysohn Gmbh Plastifier with disk and pin throttle for plastic materials
US6238079B1 (en) 1999-04-28 2001-05-29 The Japan Steel Works, Ltd. Kneading degree adjusting device for twin extruder
US20030007709A1 (en) * 2001-07-05 2003-01-09 Norbert Schweigler Internal bearing for screw machines
US20030025236A1 (en) * 2001-08-01 2003-02-06 Xerox Corporation Toner extruder feed apparatus
US6705753B2 (en) * 2000-02-24 2004-03-16 Berstoff Gmbh Extruder comprising blister mechanism
US20070237022A1 (en) * 2006-04-11 2007-10-11 Wiltz Philip B Extruder mid-barrel adjustable valve assembly
US20090122636A1 (en) * 2005-07-11 2009-05-14 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Intermeshing type twin screw extruder and mixing degree adjusting device
US20090175120A1 (en) * 2008-01-03 2009-07-09 Wenger Manufacturing, Inc. Extruder having variable mid-barrel restriction and adjacent high intensity mixing assembly
US20100110822A1 (en) * 2008-10-31 2010-05-06 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Device and method for adjusting the degree of mixing
US20100309745A1 (en) * 2008-01-30 2010-12-09 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Kneading degree adjusting apparatus, extruder and continuous kneader
US20110170369A1 (en) * 2005-07-12 2011-07-14 Carl-Gustaf Ek Counter-rotating twin screw extruder
US20180093394A1 (en) * 2016-09-30 2018-04-05 Toyota Jidosha Kabushiki Kaisha Twin-screw extrusion kneader and manufacturing method for electrode paste therewith

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CA1073170A (en) * 1975-11-28 1980-03-11 David B. Todd Multi-barrel continuous material processing machine with a multi-positionable flow controlling saddle part
DE3003615C2 (de) * 1980-02-01 1984-03-29 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover Schneckenstrangpresse mit Stiftzylinder
ES8607810A1 (es) * 1985-04-30 1986-06-01 Gumix Sa Una maquina extrusora-turbomezcladora
ES8607809A1 (es) * 1985-04-30 1986-06-01 Gumix Sa Maquina extrusora-turbomezcladora
JPS62231719A (ja) * 1986-04-01 1987-10-12 Kobe Kikai Kk ゴム材料の押出装置
DE3772991D1 (de) * 1987-08-21 1991-10-17 Schumacher Walter Vorrichtung zum extrudieren, expandieren und/oder thermischen behandeln von stoffen und stoffgemischen.
GB2255039A (en) * 1991-04-19 1992-10-28 Frenkel Ag C D Cold feed rubber extruder construction.
NL1024760C2 (nl) * 2003-11-11 2005-05-12 Tno Inrichting en werkwijze voor het verwerken van meel en water tot beslag voor het daaruit winnen van zetmeel en/of eiwit, alsmede met deze inrichting en/of werkwijze geproduceerd beslag.

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US3804382A (en) * 1971-07-01 1974-04-16 Cincinnati Milacron Inc Extruder construction

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US3804382A (en) * 1971-07-01 1974-04-16 Cincinnati Milacron Inc Extruder construction

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538917A (en) * 1981-12-22 1985-09-03 Uniroyal Englebert Reifen Gmbh Screw extruder
EP0116773A1 (en) * 1983-01-13 1984-08-29 The Uniroyal Goodrich Tire Company Controlled shear cold-feed mixer/extruder
US5145251A (en) * 1988-05-17 1992-09-08 The Japan Steel Works, Ltd. Extruder having degree-of-kneading adjusting device
US4964729A (en) * 1988-06-10 1990-10-23 Rcm Rubber Consulting & Machinery Extruding device
US5190771A (en) * 1990-04-20 1993-03-02 Kraftanlagen Ag Screw extruder
US5362146A (en) * 1991-06-03 1994-11-08 Friedrich Theysohn Gmbh Plastifier with disk and pin throttle for plastic materials
US5219589A (en) * 1992-01-22 1993-06-15 Bridgestone/Firestone, Inc. Vented kneading pin for extruder
US6238079B1 (en) 1999-04-28 2001-05-29 The Japan Steel Works, Ltd. Kneading degree adjusting device for twin extruder
US6705753B2 (en) * 2000-02-24 2004-03-16 Berstoff Gmbh Extruder comprising blister mechanism
US20030007709A1 (en) * 2001-07-05 2003-01-09 Norbert Schweigler Internal bearing for screw machines
US20030025236A1 (en) * 2001-08-01 2003-02-06 Xerox Corporation Toner extruder feed apparatus
US20090122636A1 (en) * 2005-07-11 2009-05-14 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Intermeshing type twin screw extruder and mixing degree adjusting device
US7677787B2 (en) * 2005-07-11 2010-03-16 Kobe Steel, Ltd. Intermeshing type twin screw extruder and mixing degree adjusting device
US8079747B2 (en) * 2005-07-12 2011-12-20 Borealis Technology Oy Counter-rotating twin screw extruder
US20110170369A1 (en) * 2005-07-12 2011-07-14 Carl-Gustaf Ek Counter-rotating twin screw extruder
US20070237022A1 (en) * 2006-04-11 2007-10-11 Wiltz Philip B Extruder mid-barrel adjustable valve assembly
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Also Published As

Publication number Publication date
FR2197635A1 (enrdf_load_html_response) 1974-03-29
GB1396843A (en) 1975-06-04
FR2197635B3 (enrdf_load_html_response) 1976-07-09
DE2243039B2 (de) 1975-03-20
JPS4968349A (enrdf_load_html_response) 1974-07-02
IT998519B (it) 1976-02-20
DE2243039A1 (de) 1974-03-28
DE2243039C3 (de) 1980-08-14
JPS542930B2 (enrdf_load_html_response) 1979-02-15
CH555734A (de) 1974-11-15

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