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WO1990011880A1 - Outil a filiere de façonnage de matieres visqueuses - Google Patents

Outil a filiere de façonnage de matieres visqueuses Download PDF

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Publication number
WO1990011880A1
WO1990011880A1 PCT/EP1990/000490 EP9000490W WO9011880A1 WO 1990011880 A1 WO1990011880 A1 WO 1990011880A1 EP 9000490 W EP9000490 W EP 9000490W WO 9011880 A1 WO9011880 A1 WO 9011880A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
mandrel
tool
radial
nozzle
Prior art date
Application number
PCT/EP1990/000490
Other languages
German (de)
English (en)
Inventor
Erich Beck
Original Assignee
Erich Beck
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 Erich Beck filed Critical Erich Beck
Publication of WO1990011880A1 publication Critical patent/WO1990011880A1/fr

Links

Classifications

    • 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
    • B29C48/695—Flow dividers, e.g. breaker plates
    • B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
    • B29C48/705—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows in the die zone, e.g. to create flow homogeneity
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
    • B29C48/147—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle
    • B29C48/1472—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle at the die nozzle exit 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
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
    • B29C48/3366—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die using a die with concentric parts, e.g. rings, cylinders
    • 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
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/695—Flow dividers, e.g. breaker plates
    • B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under 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
    • 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
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles

Definitions

  • the invention relates to a nozzle tool according to the preamble of claim 1.
  • a nozzle tool is known from DE-GebrMS 1 927 405.
  • nozzle tools also “blow heads” or “quill heads" which have an annular gap at their axial end, through which the mass passes and thereby to a bubble is formed. After exiting, the bubble is cooled down by a cooling ring until the viscous material solidifies.
  • the difficulty lies in distributing the material with the same possible viscosity, the same temperature and the same shear stress in the annular gap in order to keep the wall thickness tolerances of the end product within narrow limits.
  • a mandrel is arranged within a hollow cylindrical housing and is screwed to the upper axial end of the tool housing with an axial end flange (“mandrel head”).
  • mandrel head At the lower axial tool end, the annular gap extends between the mandrel end and the tool housing.
  • the viscous mass is supplied through a radial inlet channel in the region of the upper axial housing end, which opens into a distributor channel formed on the mandrel jacket.
  • the distribution channel initially has two branches fed by the inlet channel, each of which extends over the fourth circumference of the mandrel and then extends several times in the axial direction. branch cessively.
  • each partial stream flowing into the annular gap has the same length.
  • f-ö + rs t the pressure loss along the distribution channel of, for example, 300 bar, which has to be applied by a corresponding pumping power of the extrudate pump, to a temperature increase of the mass progressing in the axial direction corresponding to the pumping power conversion of, for example, 15 ° C. Since the duct wall temperatures remain the same over the entire length of the distributor duct because of the axial extension of the distributor duct, there is an axially increasing temperature gradient between the molten mass and the distributor duct walls.
  • the invention is based on the consideration of arranging the distributor channel in a radial and not in an axial tool plane, which has two advantages.
  • a radial distributor channel can easily be combined with an axial spiral distributor, since the mandrel length is only determined by the length of the spiral distributor and can therefore be dimensioned sufficiently short and stiff.
  • a swirl duct By connecting a swirl duct, a satisfactory overlap of the partial mass flows of the distributor duct is obtained, with the result that stripes in the end product are avoided.
  • a distribution channel running in a radial plane is subject with its channel wall to the temperature gradient of the tool material from the inside to the outside.
  • the mass Since the molten mass is increasingly mentioned as it moves from radially outside to radially inside as a result of the aforementioned conversion of the pump power into heat, the mass has the same temperature as the channel wall at all points on its way through the distributor channel designed according to the invention . This independent temperature adjustment ensures constant sliding and friction conditions and thus - -V -
  • FIG. 1 shows a longitudinal section through a first embodiment of a nozzle tool according to the invention
  • FIG. 2 shows a cross section through the distributor channel of the nozzle tool according to FIG. 1 along the section line II-II;
  • Fig. 3 shows a detail section similar to that in Fig. 1 for
  • 3a shows a plan view of the transition region between the distribution channel and a collecting channel of the nozzle tool according to FIG. 3, and
  • FIG. 4 shows a longitudinal section through a further embodiment of a nozzle tool according to the invention with a multilayer structure.
  • the nozzle tool illustrated in FIG. 1 for producing film bubbles, tubes and the like from a viscous material such as, for. B. plasticized plastic (PVC, polyethylene and the like) has a hollow cylindrical tool housing 10 which has a flange-shaped projection 10a at its upper axial end.
  • a cylindrical mandrel 20 is inserted, which on its upper 1 axial end is provided with a mandrel head 21.
  • the mandrel head lies flush on the flange-shaped extension 10a of the tool housing 10 and is connected to the.
  • the diameter of the dome 20 is chosen to be somewhat smaller than the diameter of the bore 10b in order to form annular and helical overflow gaps (in the region of webs of a rotation) between the outer surface of the mandrel 20 to be explained in more detail and the smooth, cylindrical inner surface 0 of the bore 10b ⁇ symmetrical collecting duct 22 or swirl ducts 23 of a spiral distributor) and an annular gap 30 extending to the lower axial end.
  • narrow nozzle gap 31 exits the molded into a tube or a pipe, viscous mass, and is then - as is not shown - is solidified by a cooling air ring or any other cooling device.
  • the width of the annular gap 30 is approximately 3 mm, while the nozzle gap 31 is only approximately 0.8 mm wide.
  • the inlet for the viscous mass is in the region of the upper axial end of the tool and is formed by a radial inlet channel 25 11, which extends in the flange-shaped extension 10 a of the tool housing 10.
  • the inlet duct 11 has a radially extending section 11a, which continues via a 90 ° bend 11b into an axially extending end section 11c up to a distributor duct g ⁇ 12.
  • the distributor channel 12 runs exclusively in a radial tool plane and, in the example shown according to FIGS. 1 and 3, is in the contact surface gc between the mandrel head 21 and the flange-shaped extension 10a of the tool housing 10, in such a way that the channel sections of the distributor channel 12 provided with a circular cross section, each with half the cross section, are machined into the surface of the nozzle head 21 or the attachment 10a, as the sectional view according to FIG. 2 shows.
  • the course of the distribution channel 12, which is yet to be described, is intended to divide the mass flow into a multiplicity of equally long partial flows, which end in a uniform distribution on the circumference of the mandrel 10.
  • the distributor channel 12 initially has two subchannels 12a, 12b, each of which extends over a circumferential section of 45 ° and is fed at its common origin by the axially extending end section 11c of the inlet channel 11. Because of the 90 ° transition from the axial end section 11c into the radial subchannels 12a, 12b, the flow conditions for an exact halving of the mass flow onto the two subchannels 12a, 12b are more favorable than with a mass supply without angling 12b and end section 11c.
  • the ends of the subchannels 12a, 12b are thus diametrically opposite and branch into two subchannels 12al, 12a2 and 12bl, 12b2, respectively, which are located radially further inwards than the subchannels 12a, 12b and run in opposite directions.
  • This The branching is repeated, the subchannels 12ala and 12alb arising from the subchannel 12al, the subchannels 12a2a and 12a2b from the subchannel 12a2, the subchannels 12bla and 12blb from the subchannel 12bl and the subchannels 12b2a and 12b2b from the subchannel 12b2 .
  • the cross sections decrease with a progressively increasing division of the partial streams. while the flow velocity remains the same, the pressure in the subchannels decreases.
  • a decreasing pressure in the partial streams means at the same time a correspondingly increasing temperature of the partial streams, which can be explained by the fact that the power of the pump (not shown) arranged in front of the inlet duct 11 is converted into thermal energy.
  • the outside to the inside radially corresponds to a rectified temperature profile of the distributor channel wall, which results from the fact that the material of the tool exhibits a temperature gradient from the inside to the outside due to the cooling.
  • This temperature gradient can be
  • the melt temperature profile can be largely adapted to the temperature profile of the channel wall.
  • the primary deflection of the radial mass flow into an axial mass flow which is provided for the region where the inlet channel 11 opens into the two first subchannels 12a, 12b, can — as is not shown — also on all or
  • 35 can be provided at least at some further branching points of the distribution channel 12 in order to achieve the greatest possible to achieve an even distribution of the mass over the mandrel circumference.
  • the ends of the subchannels 12ala to 12b2b pass over fishtail-like deflection regions 12c into a rotationally symmetrical, annular collecting channel 22 on the mandrel circumference or mandrel jacket.
  • Adjoining the collecting duct 22 is an axial spiral distributor, which consists of a plurality of swirl ducts 23, corresponding to the number of sub-ducts 12ala to 12b2b or partial flows, which are designed to be helical on the mandrel jacket.
  • the annular collecting duct 22 becomes closed the swirl channels 23 bounded by a web section 22a of the mandrel jacket.
  • the web section 22a has, for example, a radial distance of 1.5 mm from the inner surface of the housing bore 10b, the gap in question ensuring an evening of the partial flows when they enter the swirl channels 23.
  • the webs 23a between the individual swirl channels 23 have, for example, a radial distance of 0.5 mm to 1.0 mm from the inner surface of the housing 10b, the gaps between webs 23a and the bore surface serving to ensure that material from the swirl channels overflows and thus the overlap of the partial streams is improved.
  • the spiral distributor extends in the case of FIGS. 1 and 3 over a third or over half the axial length of the mandrel 20 and merges into the annular gap 30, which in the case of FIG. 3 is bent towards the mandrel axis, in order to adapt a standard tool size to different nozzle gaps -To achieve diameter.
  • the tool housing 10 and the mandrel 20 have screwable insert pieces 101 in the lower region respectively . 201 on.
  • the embodiment according to FIG. 4 differs from FIG. 1 by a multilayer structure of the mandrel in an actual (inner) mandrel 20 and two mandrel sleeves 40, 50 arranged concentrically to the mandrel 20.
  • Such a multilayer construction serves to to produce so-called composite films from a corresponding number of film layers.
  • the individual film layers can consist of different materials.
  • the mandrel sleeves 40, 50 each have a radial flange 41 or 51 corresponding to the mandrel head 21, in which a further inlet channel 42 or 52 assigned to the respective mandrel sleeve 40, 50 runs in the same way as the inlet channel 11 in the Embodiment according to FIG. 1.
  • the further inlet ducts 41, 51 each open into an associated distributor duct 43 or 53, which extends in a radial tool plane, the design of which corresponds to the distributor duct 12 according to FIG. 1.
  • the annular gaps adjoining the swirl channels 45 and 55 open obliquely into the nozzle gap 31 at the axial lower end of the tool according to FIG 4, so that all the annular mass flows formed by the "layers" (mandrel 20. mandrel sleeves 40, 50) of the tool are combined in front of the nozzle gap 31.

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

Abstract

Afin d'adapter aussi exactement que possible la température d'une matière visqueuse à la température des parois du canal distributeur (12) d'un outil à filière utile pour fabriquer des feuilles tubulaires, des tubes ou similaire à partir d'une matière visqueuse, le canal distributeur (12) s'étend exclusivement sur un plan radial de l'outil, à l'intérieur d'une paroi formée par le logement (10) de l'outil et/ou par une tête de mandrin (21) qui recouvre radialement le logement (10) de l'outil.
PCT/EP1990/000490 1989-04-01 1990-03-27 Outil a filiere de façonnage de matieres visqueuses WO1990011880A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3910493A DE3910493A1 (de) 1989-04-01 1989-04-01 Extrusionsduese fuer blasfolien- und rohrproduktionen aus thermoplastischen kunststoffen
DEP3910493.1 1989-04-01

Publications (1)

Publication Number Publication Date
WO1990011880A1 true WO1990011880A1 (fr) 1990-10-18

Family

ID=6377562

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/000490 WO1990011880A1 (fr) 1989-04-01 1990-03-27 Outil a filiere de façonnage de matieres visqueuses

Country Status (4)

Country Link
EP (1) EP0417236A1 (fr)
JP (1) JPH03501712A (fr)
DE (1) DE3910493A1 (fr)
WO (1) WO1990011880A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004341A1 (fr) * 1992-08-14 1994-03-03 Machinefabriek 'de Rollepaal' B.V. Tete de distribution destinee a former un profile tubulaire a partir d'une ou plusieurs coulees de matiere thermoplastique extrudee
WO1994008774A1 (fr) * 1992-10-17 1994-04-28 Krupp Bellaform Maschinenbau Gmbh Procede et tete extrudeuse pour la fabrication et/ou l'enrobage de profiles files
EP0692363A3 (fr) * 1994-07-14 1996-09-18 Techne Spa Tête de co-extrusion pour machine de thermoformage par soufflage, avec changement rapide de couches colorées extrudées
US5672303A (en) * 1992-10-17 1997-09-30 Bellaform Extrusionstechnik Gmbh Process and extruding head for the manufacture and/or coating of extruding profiles
WO2013011079A1 (fr) 2011-07-20 2013-01-24 Plastika Kritis S.A. Filière de co-extrusion concentrique et procédé d'extrusion de film thermoplastique multicouche

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9216920U1 (de) * 1992-10-13 1994-02-24 Windmöller & Hölscher, 49525 Lengerich Extrusionswerkzeug zur Extrusion von Schmelzeschläuchen
GB0310715D0 (en) 2003-05-09 2003-06-11 Angiomed Ag Strain management in stent delivery system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820249A (en) * 1952-10-08 1958-01-21 Lavorazione Mat Plastiche Sas Apparatus for coating articles with multi-layer linings
DE1140337B (de) * 1959-11-07 1962-11-29 Troester Maschf Paul Spritzkopf fuer die Herstellung von Schlaeuchen, Schlauchfolien usw. aus thermoplastischen Werkstoffen
DE1927405A1 (de) * 1969-05-29 1970-12-03 Nelson James Alan Eisfahrzeug
FR2308490A1 (fr) * 1975-04-25 1976-11-19 Bonnel Pierre Filiere a alimentation laterale pour l'extrusion de gaines en matiere thermoplastique
FR2377878A1 (fr) * 1977-01-21 1978-08-18 Ato Emballage Perfectionnement aux tetes d'extrusion pour films tubulaires en matiere plastique
US4395221A (en) * 1980-01-04 1983-07-26 Mobil Oil Corporation Tubular extrusion apparatus
EP0215337A2 (fr) * 1985-09-16 1987-03-25 Battenfeld Fischer Blasformtechnik Gmbh Tête d'extrusion

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH527688A (de) * 1970-08-21 1972-09-15 Riwisa Ag Schlitzdüsenkopf zum Extrudieren von Kunststoffen
DE2329792A1 (de) * 1973-06-12 1975-01-09 John J Farrell Spritzform fuer geblasene kunststofffolien
JPS6125128A (ja) * 1984-07-14 1986-02-04 Canon Inc カイラルスメクティック液晶素子
JPS6140130A (ja) * 1984-08-01 1986-02-26 Purakoo:Kk 押出機用ダイ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820249A (en) * 1952-10-08 1958-01-21 Lavorazione Mat Plastiche Sas Apparatus for coating articles with multi-layer linings
DE1140337B (de) * 1959-11-07 1962-11-29 Troester Maschf Paul Spritzkopf fuer die Herstellung von Schlaeuchen, Schlauchfolien usw. aus thermoplastischen Werkstoffen
DE1927405A1 (de) * 1969-05-29 1970-12-03 Nelson James Alan Eisfahrzeug
FR2308490A1 (fr) * 1975-04-25 1976-11-19 Bonnel Pierre Filiere a alimentation laterale pour l'extrusion de gaines en matiere thermoplastique
FR2377878A1 (fr) * 1977-01-21 1978-08-18 Ato Emballage Perfectionnement aux tetes d'extrusion pour films tubulaires en matiere plastique
US4395221A (en) * 1980-01-04 1983-07-26 Mobil Oil Corporation Tubular extrusion apparatus
EP0215337A2 (fr) * 1985-09-16 1987-03-25 Battenfeld Fischer Blasformtechnik Gmbh Tête d'extrusion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004341A1 (fr) * 1992-08-14 1994-03-03 Machinefabriek 'de Rollepaal' B.V. Tete de distribution destinee a former un profile tubulaire a partir d'une ou plusieurs coulees de matiere thermoplastique extrudee
WO1994008774A1 (fr) * 1992-10-17 1994-04-28 Krupp Bellaform Maschinenbau Gmbh Procede et tete extrudeuse pour la fabrication et/ou l'enrobage de profiles files
US5672303A (en) * 1992-10-17 1997-09-30 Bellaform Extrusionstechnik Gmbh Process and extruding head for the manufacture and/or coating of extruding profiles
EP0692363A3 (fr) * 1994-07-14 1996-09-18 Techne Spa Tête de co-extrusion pour machine de thermoformage par soufflage, avec changement rapide de couches colorées extrudées
WO2013011079A1 (fr) 2011-07-20 2013-01-24 Plastika Kritis S.A. Filière de co-extrusion concentrique et procédé d'extrusion de film thermoplastique multicouche

Also Published As

Publication number Publication date
EP0417236A1 (fr) 1991-03-20
JPH03501712A (ja) 1991-04-18
DE3910493A1 (de) 1990-10-04

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