WO2004054780A1 - Appareil pour extruder un melange composite extrude - Google Patents

Appareil pour extruder un melange composite extrude Download PDF

Info

Publication number
WO2004054780A1
WO2004054780A1 PCT/EP2003/014023 EP0314023W WO2004054780A1 WO 2004054780 A1 WO2004054780 A1 WO 2004054780A1 EP 0314023 W EP0314023 W EP 0314023W WO 2004054780 A1 WO2004054780 A1 WO 2004054780A1
Authority
WO
WIPO (PCT)
Prior art keywords
elastomeric material
duct
extrusion
flow
expanded
Prior art date
Application number
PCT/EP2003/014023
Other languages
English (en)
Inventor
Patrizio CECCARELLO
Original Assignee
Metzeler Automotive Profile Systems Italy S.P.A.
Shanghai Saic-Metzeler Sealing Systems Co., Ltd.
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 Metzeler Automotive Profile Systems Italy S.P.A., Shanghai Saic-Metzeler Sealing Systems Co., Ltd. filed Critical Metzeler Automotive Profile Systems Italy S.P.A.
Priority to AU2003293831A priority Critical patent/AU2003293831A1/en
Publication of WO2004054780A1 publication Critical patent/WO2004054780A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J10/00—Sealing arrangements
    • B60J10/15—Sealing arrangements characterised by the material
    • B60J10/16—Sealing arrangements characterised by the material consisting of two or more plastic materials having different physical or chemical properties
    • 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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous

Definitions

  • the present invention relates to apparatus for extruding a composite extrusion, such as a sealing strip for a motor vehicle, which includes a first portion made of a first elastomeric material with an expanded structure and at least a second portion made of a second elastomeric material with a compact structure .
  • the invention relates to apparatus including first and second feeder extruders, operable to produce a continuous flow or extrusion of the said first and said second elastomeric material respectively from respective outlet orifices, and an extruder head with first and second lateral inlets, sealably coupled to the output of the first and the second feeder extruders respectively; first and second ducts being formed in the said extruder head for conveying a flow of the said first and second elastomeric materials respectively, from the said first and said second lateral inlets respectively to an output region provided with means for shaping and combining the said flows in order to produce the desired composite extrusion.
  • Extrusion apparatus of the type described above is known in the art in which the aforesaid first and second ducts through the extruder head are of a similar section and length, whereby they offer substantially the same resistance to the elastomeric materials respectively flowing through them.
  • the feeder extruders are typically of a screw type, with one or more starts.
  • the flows or extrusions of elastomeric material which are produced by these feeder extruders are subject to pulsations, the frequency and length of which depend on the pitch of the respective extruder screw, as well as on the number of starts or threads and on the speed of rotation of the screw.
  • the extrusion pulsation leaves a "trace" on the flow of extruded material, the extent of which also depends on the density of the extruded material, this trace being particularly defined at low densities, as in the case of expanded or foamed elastomeric materials (sometimes known as foam rubber) .
  • the "trace” is made more apparent by the swelling expansion agents which act in the vulcanization process which follows extrusion.
  • One object of the present invention is to provide extrusion apparatus of the type described above which has been improved so as to eliminate, or at least reduce the trace of extrusion pulsation on the finished product, in particular any trace left by these pulsations in the portion of the composite product made of the first elastomeric material having an expanded structure.
  • the said ducts through the extruder head each curve so as to change direction at least once, this change of direction being more accentuated in the first duct than in the second.
  • Figure 1 is a partially sectioned perspective view showing a portion of composite extrusion produced with apparatus of the invention
  • Figure 2 is a partial front view of a extrusion apparatus according to the invention.
  • Figure 3 is a section taken on the line III-III of Figure 2.
  • a longitudinal portion of a composite extrusion in particular a sealing strip for the edge of an opening in the body of a motor vehicle, is generally indicated 1.
  • the extrusion 1 includes a sealing element 2, essentially constituted by a fin or lip and formed of an elastomeric material with an expanded or cellular structure (foam rubber) , extruded in one piece with a second, fixing portion or element 3 , made of an elastomeric material with a non-expanded structure (so-called hard rubber) .
  • the fixing element 3 is essentially U-shape in cross section,, within which are a plurality of integral fixing ribs 4 for engaging a flange formed along the edge of the opening that the sealing strip 1 is intended to close.
  • the fixing portion 3 includes an inner reinforcement 5, made of a metal for example, which is embedded in it during extrusion. It is not necessary to include this reinforcement .
  • extrusion apparatus in Figures 2 and 3 , operabl ⁇ e to produce composite extrusions of the type shown in Figure 1, is generally indicated 10.
  • the extrusion apparatus 10 (see Figure 3 in particular) includes two feeder extruders 11 and 12, the outputs 11a, 12a of which are coupled to corresponding lateral inlets 13a and 13b of an extruder head generally indicated 13.
  • feeder extruders 11 and 12 are of a screw type which, in operation, feed respective flows or extrusions of an expanded elastomeric material and a non- expanded elastomeric material respectively to the extruder head 13.
  • the. extruder head 13 has a rear opening 14 (see Figure 3) for inserting the reinforcement 5 of the sealing strip. This opening leads into a central duct 15 passing through the extruder head 13.
  • the intakes 13a and 13b of the head 13 are sealably coupled to the feeder ' extruders 11 and 12, by means of a threaded coupling for example.
  • the extruder head 13 comprises a metal body 16 with the lateral inlets 13a and 13b and the central duct or passage 15 formed therein.
  • the said lateral inlets are connected to respective ducts 17 and 18 formed in the body 16 and opening onto a front surface 13a thereof, at the site of a flanged disc 19 having a multi- disc die, generally indicated 20, secured thereto.
  • the flanged disc 19 of the pack of dies 20 is coupled and secured to a frontal portion 16b of the body 16 by two opposing arcuate jaws 21 and 22, each substantially channel-shaped in cross section. These jaws (see Figure 2) are pivoted at 23 and 24 respectively onto a front projection of the body 16 of the extruder head 13, so as to be turnable, as shown by the partial broken lines of Figure 2 , in order to enable the die 20 to be fitted or removed quickly and easily.
  • the die 20 includes a plurality of discs 25 (see Figure 3) , fitted tightly together and fixed to the flanged disc 19 by a plurality of screws 26.
  • the assembly constituted by the disc 19 and the die, 20 is provided, in a manner which is known per se, for shaping and combining the flows of expanded and non-expanded elastomeric material respectively which flow in use through the ducts 17 and 18 of the body 16 of the extruder head 13, thereby producing the required composite extrusion.
  • the end disc 25 of the die 20 has an extrusion aperture, indicated 27 in Figure 2 , of a shape corresponding to the cross section of the composite extrusion which is being produced.
  • the ducts 17 and 18 through the extrusion head 13 are made in such a way that the duct 17 is able to offer a greater resistance to the expanded elastomeric material passing through it than the duct 18 is able to offer to the non-expanded elastomeric material, thereby attenuating to a greater degree the (relatively stronger) pulsation of this flow of expanded elastomeric material.
  • the ducts 17 and 18 are preferably the same in cross section, while the duct 17 is longer than the duct 18.
  • the ducts 17 and 18 both make at least one curvilinear change of direction, with the change of direction of the duct 17 being more accentuated than that of the duct 18. This characteristic helps further to attenuate pulsation in the flow of elastomeric material with an expanded structure.
  • the duct 17 through the extruder head 13 forms an elbow bend 30, changing direction by about 90°, while the duct 18 forms a bend 31, changing direction by about 120°.
  • the feeder extruder 11 can be given a deflecting output surface 40, facing the end of the screw 41 of this extruder and able to deflect the flow or extrusion of expanded elastomeric material to one side relative to the axial direction of extrusion.
  • This arrangement makes it possible to cause the flow of expanded elastomeric material to change direction (preferably in the opposite sense to the curve 30 in the duct 17) before it even enters the duct 17 through the extruder head 13, and also helps to attenuate pulsation through this flow.
  • the dimensions of the extruder head 13 are extremely compact, especially the axial dimensions. Passages 50 for cooling fluid to flow through are also formed through the body 16 of said extruder head 13.
  • the extruder head described above is characterised in that it can contain small volumes of elastomeric material and very small amounts of waste.
  • the dies can be changed rapidly. Cleaning operations due to changes in the elastomeric material being processed are fast and easy, as are operations to insert any metal reinforcement (if this is being used) .
  • the extruder head makes it possible to achieve a favourable ratio of metal to cooling water, thereby considerably reducing heat inertia.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

L'appareil (1) de l'invention comprend une première et une seconde chargeuses-extrudeuses (11, 12) pouvant produire chacune un flux ou extrusion continu(e) d'une première et d'une seconde matières élastomères respectivement, à partir d'orifices de sortie respectives (11a, 12a), la première matière présentant une structure expansée et la seconde matière une structure non expansée. L'appareil comprend également une tête d'extrudeuse (13) présentant un premier et un second orifices d'entrée latéraux (13a, 13b) couplés de manière étanche aux orifices de sortie de la première et de la seconde chargeuses-extrudeuses (11, 12) respectivement. Un premier et un second conduits (17, 18) sont ménagés dans la tête d'extrudeuse (13) pour acheminer un flux de la première et de la seconde matières élastomères respectivement, à partir de la première prise latérale (13 a) ou de la seconde prise latérale (13 b), respectivement, vers une zone de sortie où des dispositifs (20; 19, 25) sont mis en oeuvre pour mouler et combiner les flux afin de produire le mélange composite extrudé (1) désiré. Les conduits (17, 18) ménagés dans la tête d'extrudeuse (13) sont conçus de sorte que le premier conduit (17) puisse offrir une résistance à la matière élastomère expansée supérieure à celle que le second conduit (18) offre à la seconde matière élastomère non expansée, ce qui atténue, dans une plus large mesure, la pulsation dans le flux de la première matière élastomère.
PCT/EP2003/014023 2002-12-17 2003-12-11 Appareil pour extruder un melange composite extrude WO2004054780A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003293831A AU2003293831A1 (en) 2002-12-17 2003-12-11 Apparatus for extruding a composite extrudate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2002A001089 2002-12-17
IT001089A ITTO20021089A1 (it) 2002-12-17 2002-12-17 Apparecchiatura per l'estrusione di un trafilato composito.

Publications (1)

Publication Number Publication Date
WO2004054780A1 true WO2004054780A1 (fr) 2004-07-01

Family

ID=32587905

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/014023 WO2004054780A1 (fr) 2002-12-17 2003-12-11 Appareil pour extruder un melange composite extrude

Country Status (4)

Country Link
CN (1) CN100509349C (fr)
AU (1) AU2003293831A1 (fr)
IT (1) ITTO20021089A1 (fr)
WO (1) WO2004054780A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111590858A (zh) * 2020-05-18 2020-08-28 诺博橡胶制品有限公司 多复合共挤机头

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076314A5 (en) * 1970-01-09 1971-10-15 Cie Financiere Cale Composite door seals - extrusion through two dies with a metal core and using two thermoplastics
FR2460230A1 (fr) * 1979-07-02 1981-01-23 Saiag Spa Profiles d'etancheite destines aux caisses de vehicules automobiles et procede pour leur fabrication
US4419844A (en) * 1981-11-12 1983-12-13 Bridgestone Australia Pty. Ltd. Weatherstrip
GB2164894A (en) * 1984-09-29 1986-04-03 Henniges Gummi Method of and apparatus for extruding sealing strips
US5865472A (en) * 1996-12-19 1999-02-02 Hoechst Trespaphan Gmbh Compensator for temperature-caused length changes
US5965075A (en) * 1993-09-01 1999-10-12 Marley Mouldings Inc. Triple extruded frame profiles and method of producing same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076314A5 (en) * 1970-01-09 1971-10-15 Cie Financiere Cale Composite door seals - extrusion through two dies with a metal core and using two thermoplastics
FR2460230A1 (fr) * 1979-07-02 1981-01-23 Saiag Spa Profiles d'etancheite destines aux caisses de vehicules automobiles et procede pour leur fabrication
US4419844A (en) * 1981-11-12 1983-12-13 Bridgestone Australia Pty. Ltd. Weatherstrip
GB2164894A (en) * 1984-09-29 1986-04-03 Henniges Gummi Method of and apparatus for extruding sealing strips
US5965075A (en) * 1993-09-01 1999-10-12 Marley Mouldings Inc. Triple extruded frame profiles and method of producing same
US5865472A (en) * 1996-12-19 1999-02-02 Hoechst Trespaphan Gmbh Compensator for temperature-caused length changes

Also Published As

Publication number Publication date
CN1729090A (zh) 2006-02-01
CN100509349C (zh) 2009-07-08
ITTO20021089A1 (it) 2004-06-18
AU2003293831A8 (en) 2004-07-09
AU2003293831A1 (en) 2004-07-09

Similar Documents

Publication Publication Date Title
US3677676A (en) Apparatus for forming plastic tubing having a smooth inner wall and a corrugated outer wall
US5957391A (en) Drip irrigation hose with self-cleaning inlet and method for its manufacture
MXPA06014202A (es) Procedimiento para la fabricacion continua de un tubo de union con manguito de tubo, tubo de union y dispositivo para la realizacion del procedimiento y para la fabricacion del tubo de union.
DE4314192C2 (de) Verfahren zur Herstellung eines Profilformteils
EP0753391B1 (fr) Appareil d'extrusion pour élastomère
EP0650408B1 (fr) Procede et dispositif pour la covulcanisation de matieres thermoplastiques et d'elastomeres
US5370456A (en) Continuous kneading apparatus provided with rotatable kneading members and fixed kneading members
US4375381A (en) Two piece extruded hose
WO1999002273A1 (fr) Emetteur compensateur de pression forme d'une seule piece
US6821106B1 (en) Roller die preformer for wide extrusions
WO2004054780A1 (fr) Appareil pour extruder un melange composite extrude
US3666389A (en) Extrusion apparatus for making conduit pipe
US20090098231A1 (en) Apparatus for the manufacture of compound pipes
JP5364165B2 (ja) ゴム押出し用口金
US7052260B1 (en) Polymer processing system including decompression chamber and method for using same
US20090110761A1 (en) Extrusion Molding Apparatus for Resin Tube
CN100434257C (zh) 树脂制多层管的挤压成形装置
CA2622695C (fr) Appareil et methode de voie d'acheminement de filiere d'extrusion pour tubes
JP3230828B2 (ja) 断面形状が変化する異形押出成形品の製造方法
JPH071549A (ja) 厚肉合成樹脂板押出成形用金型
JP3161753B2 (ja) ガータ部を有するウインドモールの製造方法
KR100196859B1 (ko) 나선형 pvc 호스와 그 제조방법 및 장치
JP3616151B2 (ja) 空気入りタイヤ用未加硫ゴム部材及びその製造方法
CN117261144A (zh) 一种聚乙烯夹网格纤维一体缠绕实壁管的生产工艺及设备
JPH11188772A (ja) 梨地模様付き合成樹脂材およびその製造方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 20038A6603X

Country of ref document: CN

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP