EP2056677A1 - Dispositif et procédé d'extrusion de matières viscoélastiques - Google Patents

Dispositif et procédé d'extrusion de matières viscoélastiques

Info

Publication number
EP2056677A1
EP2056677A1 EP07785114A EP07785114A EP2056677A1 EP 2056677 A1 EP2056677 A1 EP 2056677A1 EP 07785114 A EP07785114 A EP 07785114A EP 07785114 A EP07785114 A EP 07785114A EP 2056677 A1 EP2056677 A1 EP 2056677A1
Authority
EP
European Patent Office
Prior art keywords
viscoelastic
viscoelastic material
nozzle
mass
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07785114A
Other languages
German (de)
English (en)
Inventor
Boris Ouriev
Dieter Hofacker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Buehler AG
Original Assignee
Buehler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP2056677A1 publication Critical patent/EP2056677A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21C—MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH
    • A21C3/00—Machines or apparatus for shaping batches of dough before subdivision
    • A21C3/04—Dough-extruding machines ; Hoppers with moving elements, e.g. rollers or belts as wall elements for drawing the dough
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92019—Pressure
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92085—Velocity
    • B29C2948/92104—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/92409—Die; Nozzle zone
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—Pressure
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone

Definitions

  • the invention relates to a device for the extrusion of viscoelastic compositions, in particular for the extrusion of dough, with a step for the formation of strands or flat sheet or foil-like structures from the viscoelastic mass.
  • Known extrusion devices have a filling area for introducing masses or constituents of the masses into the device; a conveying section for conveying and processing the mass flow conveyed by the device; a manifold region for reforming and distributing the mass flow to a plurality of mass substreams; and a nozzle portion having a plurality of nozzles for forming a ground strand or a ground foil from the respective mass sub-streams.
  • the invention has for its object to largely eliminate such stresses in the extruded strands or flat structures of viscoelastic mass or at least reduce so much that under the usual conditions of extruded strand or film extrusion no strong deviations from the straightness or occur from the plane form.
  • viscoelastic mass which flows under normal operating conditions (temperature, pumping power)
  • viscoelastic material in the wall regions is usually a synthetic material, which is among the Although usual operating conditions elastically deformable, but can not flow from it.
  • the viscoelastic regions may be formed as pillow-like elements having a closed flexible shell filled with a filling of viscoelastic material.
  • the filling can be any viscoelastic material.
  • An extreme case is a purely viscous filling material without elastic component. In this case one chooses as envelope material a material with elastic and without viscous component.
  • Another extreme case is a purely elastic filling material without a viscous component. In this case, the shell is unnecessary.
  • the inner walls of the manifold area are resilient and elastically deformable at least in some areas, but can not flow from it. Therefore, at least the sheath material must be purely elastic without a viscous component. Instead of such cushions having an elastic sheath and a filling material which has at least one viscous component, it is also possible to use solid elastically deformable elements.
  • the viscoelastic regions may also comprise one or more gas-filled chambers, wherein the shell material forming the chambers is a flexible material whose flexibility is given by the thin-walledness and / or the elasticity of the shell material.
  • curved channels in which intensive shaping (film extrusion) and possibly also fragmentation (strand extrusion) of the viscoelastic mass to be processed take place in this distributor area improved degradation of at least the asymmetric mechanical stresses in the reshaping viscoelastic mass or a strong suppression of the tendency to form such stresses.
  • This is done by largely avoiding the formation of asymmetrical velocity profiles in the curved regions of the distribution channels, which is associated with the construction of at least asymmetrical material stresses, and overall the expression of the remaining, largely symmetrical velocity profiles becomes smaller.
  • the device according to the invention produces flatter and more uniform velocity profiles whose symmetry is / are adapted to the symmetry of the nozzle (s).
  • the inner walls of the nozzles are also formed, at least in some areas, from a viscoelastic material. This measure makes it possible, even in the nozzles, ie in the last phase of forming, to avoid or reduce any residual stresses, but especially asymmetric residual stresses.
  • the present invention ensures that substantially symmetrical and flat velocity profiles are present after the distributor region as it enters the nozzle (s) and preferably also after the mass has passed through the nozzle (s).
  • the viscoelastic material on or in the walls may comprise an elastomer.
  • the viscoelastic material is embedded in inner wall depressions (cavities) of the device. In operation, it is then contacted by the viscoelastic mass and performs the compensatory movements, which lead to the uniformity or maintenance of the uniformity of the velocity profiles in the flowing mass.
  • "Uniformity" is understood to mean “as flat as possible velocity profiles whose symmetry is adapted as well as possible to the nozzle symmetry”.
  • the viscoelastic material embedded in the interior wall wells (cavities) of the device is formed by a portion of the viscoelastic mass located in the interior wall wells (cavities).
  • the inner wall depressions are used here specifically as dead zones for the viscoelastic mass to be formed, which thus assumes the function of the viscoelastic material described above. This is an exception to the distinction between “viscoelastic mass” and “viscoelastic material”.
  • the inner wall depressions (cavities) are arranged on inner wall sections at which the viscoelastic mass flow is locally accelerated. This local acceleration of the viscoelastic mass is counteracted by the evasive movements of the viscoelastic material.
  • the entire inner walls of the manifold portion are formed of a viscoelastic material.
  • a full manifold liner is used.
  • the entire inner walls of the nozzle (s) may be formed of a viscoelastic material. In this case, a full nozzle liner is used.
  • the entire distributor region is formed of a viscoelastic material.
  • the entire nozzles may be formed of a viscoelastic material.
  • the subregions in which the viscoelastic material is arranged are dead zones or congestion zones of the mass flow.
  • active measures can also be provided in the device according to the invention.
  • a controllable valve can be arranged between the distributor region and the respective nozzles of the nozzle region. It is advantageous if the device still has a pressure sensor upstream of the respective valve.
  • the respective valve in response to pressure signals of the pressure sensor can be controlled.
  • the pillow-like regions described above can also be provided with active elements.
  • the viscoelastic regions may be formed as pillow-like elements having a closed flexible shell filled with a filling of viscoelastic material.
  • the filling of the cushion can be any viscoelastic material that communicates with a controllable pressure source.
  • the viscoelastic filling material may be a liquid or a gas surrounded by an elastic shell.
  • the inner walls of the distributor area remain flexible and elastically deformable, at least in some areas, but can not flow therefrom, which is why at least the envelope material must be purely elastic without a viscous component.
  • solid elastically deformable elements can also be used here, which can be bent, pressed, stretched, twisted or otherwise deformed by actuators.
  • Fig. 1 is a sectional view of a portion (manifold portion and nozzle portion) of a first embodiment of the device according to the invention along a vertical plane containing the longitudinal axis of the device;
  • Fig. 2 is a sectional view of a portion (manifold region and nozzle region) of a second embodiment of the device according to the invention along the vertical plane containing the longitudinal axis of the device;
  • Fig. 3 is an enlarged sectional view of a portion (only nozzle) of the first embodiment of the device according to the invention along the vertical plane containing the longitudinal axis of the device;
  • Fig. 4 is an enlarged sectional view of a portion (nozzle only) of the second
  • Embodiment of the inventive device along the vertical plane, which contains the longitudinal axis of the device;
  • Fig. 5 is a sectional view of a portion (conveying area, distribution area and nozzle area) of a third embodiment of the device according to the invention along a vertical plane containing the longitudinal axis of the device.
  • FIG. 1 shows a sectional view of a distributor region 20 and a nozzle region 30 of a first exemplary embodiment of the device according to the invention along a vertical plane which contains the longitudinal axis of the device.
  • the distributor region 20 has two curved channels 21 and 22, in which the mass M is divided into a first mass partial flow M1 and a second mass partial flow M2.
  • the distributor region 20 is formed by a housing 23 and an insert 24, which is inserted into the housing 23 and may be formed in several pieces.
  • the housing 23 is preferably made of metal, while the insert 24 is preferably made of a polymer such as Teflon, PEEK or the like.
  • the nozzle region 30 has two nozzles 31, which are inserted in a nozzle plate 33.
  • the nozzles 31, 31 each adjoin one of the curved channels 21, 22.
  • the nozzle plate is preferably made of metal, while the nozzles 31, 31 are made of metal or of a polymer such as Teflon, PEEK or the like.
  • the curved channels 21, 22 are shown by a solid line. This channel geometry corresponds to the velocity profiles P1, P2 and P3 of the mass partial streams M1 or M2 flowing in the curved channels 21, 22 in the direction of flow of the mass M. These profiles are shown only for the upper curved channel 21. However, they are also formed in the same way in the lower channel 22 symmetrically to those of the upper channel 21. At the points where the mass M1 or M2 is locally accelerated.
  • a further insert 2B is arranged in each case, which preferably consists of the same material as the insert 24.
  • the inserts 28 optimize the wall Course between the channel 21 or 22 and the respective downstream nozzle 31. It is essential that this wall profile or the wall profile has a turning point 29.
  • the nozzles 31 can also be built longer accordingly, so that such a nozzle from the insert 28 and the nozzle 31 is integrally formed.
  • FIG. 2 shows a sectional view of a distributor region 20 and a nozzle region 30 of a second exemplary embodiment of the device according to the invention along a vertical plane which contains the longitudinal axis of the device.
  • the channels 21 and 22 are each equipped with an insert of viscoelastic material 25 and 26, which is inserted into recesses of the channel wall;
  • the inserts 25 and 26 formed from the viscoelastic material yield under pressure but are elastic. These inserts are compliant and, like the wells (cavities) of the first embodiment, can slow down accelerated regions of the bulk substreams M1 and M2. They perform a kind of passive peristalsis.
  • FIG. 3 shows an enlarged sectional view of a nozzle 31 of the first exemplary embodiment of the device according to the invention along the vertical plane, which contains the longitudinal axis of the device.
  • the nozzle main body 31a includes a cup-like shaped passage which is expanded against the mass flow direction from the nozzle center to the nozzle entrance and in the mass flow direction toward the nozzle exit, as seen on the nozzle wall profile 31c. Upstream of the nozzle inlet, the insert 28 is arranged, the passage is tapered in the flow direction, as can be seen on the insert wall profile 31b. Overall, a nozzle passage is formed by the insert 28 and the nozzle main body 31 a, whose inner wall profile (31 b + 31c) in principle S-shaped, i. has a turning point 29.
  • FIG. 4 shows an enlarged sectional view of a nozzle 32 of the second exemplary embodiment of the device according to the invention along the vertical plane, which contains the longitudinal axis of the device.
  • the nozzle main body 32a includes a part portion of the passage which is formed in a cusp-like manner on the side of the nozzle inlet and which is widened against the mass flow direction from the nozzle center to the nozzle inlet, as can be seen on the nozzle wall profile 32b.
  • a further portion of the passage is arranged, which is formed substantially cylindrical, but adaptive.
  • a tube-like or hose-like element 32c made of a hard-elastic or soft-elastic material is inserted into the nozzle main body 32a. sets and anchored in this frictionally and / or formschiüssig.
  • the nozzle main body 32a is recessed to a greater extent, so that an annular gap 32d is formed between the cylindrical adaptive element 32c and the main body 32a.
  • the flexibility of the adaptive element is determined by the modulus of elasticity and wall thickness of the elastic material of the cylindrical member 32c, which is preferably an elastomer, as well as the axial length and radial width of the annular gap 32d.
  • FIG. 5 shows a sectional view of a conveyor region 10 and a distributor region 40 of a third exemplary embodiment of the device according to the invention along a vertical plane which contains the longitudinal axis of the device.
  • a partial section of the conveying region 10 is indicated schematically and contains an extruder screw 11.
  • the distributor region (or transition region between conveying region and nozzle region not shown) 40 there are a plurality of elements 41, 42, 43 and 44 which are used to adjust the channel cross section in the distributor region / transition region 40 serve.
  • a rotatably mounted in the distributor housing 46 spindle 41 cooperates with a radial slide 42 via a (not shown) threaded connection, so that by rotating the spindle 41, the slider 42 can be moved in the radial direction.
  • the radial slide 42 in turn cooperates via a sliding connection with an axial slide 43.
  • This sliding connection is formed by a sliding surface 42a of the radial slide 42 and a sliding surface 43a of the axial slide 43 which contact each other.
  • a flowed through by the mass M annular channel whose cross section is adjustable by axial displacement of the axial slide 43 by operating the spindle 41.
  • the axial slide 43 has a passage extending in the axial direction, which is similar to the nozzle 31 formed like a spike.
  • this cup-shaped passage of the axial slide 43 also adaptive, ie elastomeric EIe- arranged elements 45, which have a similar effect as the ele- ments described above 25, 26, 27 and 32c.
  • a cylindrical passage which is preferably provided with a lining 47 made of non-stick material.
  • the elements 43 and 44 are made of such non-stick material or are coated with such.
  • Nozzle M3 Strand o.
  • Foliea Nozzle body M4 Strand o.
  • Forison Insert wall profile c

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif d'extrusion de masses viscoélastiques, en particulier de pâtes alimentaires. Ce dispositif présente une zone de remplissage qui permet d'introduire des masses ou des composants de masses dans le dispositif, une zone de transport (10) pour refouler et travailler le flux de pâte refoulé par le dispositif, une zone de répartition (20) pour façonner et répartir le flux de pâte en plusieurs flux partiels de pâte et une zone de filière (30) qui présente plusieurs filières (31; 32) pour former un barreau de pâte ou une feuille de pâte à partir des différents flux partiels de pâte. Selon l'invention, au moins certaines zones des parois intérieures de la zone de répartition (20) sont formées d'un matériau viscoélastique (25, 26, 27) ou présentent un matériau viscoélastique (25, 26, 27).
EP07785114A 2006-09-01 2007-08-28 Dispositif et procédé d'extrusion de matières viscoélastiques Withdrawn EP2056677A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006041301A DE102006041301A1 (de) 2006-09-01 2006-09-01 Vorrichtung und Verfahren zur Extrusion viskoelastischer Materialien
PCT/CH2007/000424 WO2008025184A1 (fr) 2006-09-01 2007-08-28 Dispositif et procédé d'extrusion de matières viscoélastiques

Publications (1)

Publication Number Publication Date
EP2056677A1 true EP2056677A1 (fr) 2009-05-13

Family

ID=38926414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07785114A Withdrawn EP2056677A1 (fr) 2006-09-01 2007-08-28 Dispositif et procédé d'extrusion de matières viscoélastiques

Country Status (4)

Country Link
US (1) US20100003360A1 (fr)
EP (1) EP2056677A1 (fr)
DE (1) DE102006041301A1 (fr)
WO (1) WO2008025184A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITNA20120072A1 (it) * 2012-11-29 2014-05-30 Rummo S P A Procedimento per la fabbricazione di trafile per pasta alimentare, le trafile stesse e il loro uso nella produzione della pasta.
AT513947A1 (de) * 2013-01-15 2014-08-15 Haas Food Equipment Gmbh Vorrichtung und Verfahren zur Bildung langgestreckter, bandförmiger Körper und zur Herstellung von Backprodukten
DE102020113660B4 (de) * 2020-05-20 2022-12-22 Vemag Maschinenbau Gmbh Teig-Behandlungseinheit, sowie Vorrichtung und Verfahren zum Behandeln von Teig

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2403476A (en) * 1944-08-08 1946-07-09 Du Pont Extrusion apparatus
US2481275A (en) * 1946-04-17 1949-09-06 Ambrette Conrad Automatic alimentary paste producing apparatus
GB887896A (en) * 1958-07-18 1962-01-24 Rinderle Karl A stirring, beating and mixing machine
US4324748A (en) * 1978-07-28 1982-04-13 Japan Styrene Paper Corporation Process and apparatus for extruding plastic foams through a fluorocarbon lined die shaping means having extended wear characteristics
US4264294A (en) * 1979-01-08 1981-04-28 Ruiz Oscar F Profiling die
IT1198565B (it) * 1983-03-04 1988-12-21 Ghiott Dolciaria Di Graziono T Estrusore a nastri per impasto da biscotti e dolci in genere
US4954061A (en) * 1987-08-28 1990-09-04 The Quaker Oats Company Multi-orifice coextrusion apparatus
US4900572A (en) * 1987-08-28 1990-02-13 Quaker Oats Company Multi-orifice coextrusion method
DE3839781C2 (de) * 1988-11-25 1997-12-18 Artur Foehl Teigaustrittsdüse zur Herstellung von Formlingen, insbesondere von Schupfnudeln
US5350290A (en) * 1993-01-19 1994-09-27 Amf Machinery Systems, Inc. Manifold and valving arrangement for dough divider
JP2835367B2 (ja) * 1994-10-27 1998-12-14 レオン自動機株式会社 食品材料の間欠定量吐出装置
US5840345A (en) * 1995-04-17 1998-11-24 Ayash; Ajwad Dough transport device
JP2989122B2 (ja) * 1995-06-13 1999-12-13 株式会社日本製鋼所 合成樹脂の押出造粒方法およびその装置
DE19831540C5 (de) * 1998-07-14 2005-07-07 Groß, Heinz, Dr.-Ing. Partielle Veränderung des Fließkanalquerschnitts eines geschlossenen Strömungskanalquerschnitts
US6303168B1 (en) * 1999-06-15 2001-10-16 The Dominion Companies, Llc Method and apparatus for forming and dividing a dough stream
GB9927682D0 (en) * 1999-11-23 2000-01-19 Unilever Plc Process for the manufacture of shaped articles
CA2333489A1 (fr) * 2000-02-02 2001-08-02 Edward Albert Matuszak Methode a faible cisaillement pour la fabrication de pates alimentaires
DE10355347A1 (de) * 2003-03-12 2004-09-23 Bühler AG Düse zur Strangbildung für viskoelastische Materialien
DE10320075A1 (de) * 2003-05-05 2004-12-02 Bühler AG Düse zur Strangbildung für viskoelastische Materialien (Einlauf-Aufweitung)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008025184A1 *

Also Published As

Publication number Publication date
US20100003360A1 (en) 2010-01-07
DE102006041301A1 (de) 2008-03-06
WO2008025184A1 (fr) 2008-03-06

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