EP3493968A1 - Tête de soufflage multicouche pour système de soufflage de film, système de soufflage de film, ainsi que procédé permettant de faire fonctionner un système de soufflage de film - Google Patents

Tête de soufflage multicouche pour système de soufflage de film, système de soufflage de film, ainsi que procédé permettant de faire fonctionner un système de soufflage de film

Info

Publication number
EP3493968A1
EP3493968A1 EP17732286.4A EP17732286A EP3493968A1 EP 3493968 A1 EP3493968 A1 EP 3493968A1 EP 17732286 A EP17732286 A EP 17732286A EP 3493968 A1 EP3493968 A1 EP 3493968A1
Authority
EP
European Patent Office
Prior art keywords
channel
helical
distributor plate
distributor
extrusion direction
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Withdrawn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
EP17732286.4A
Other languages
German (de)
English (en)
Inventor
Christoph Lettowsky
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.)
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Original Assignee
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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 Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Publication of EP3493968A1 publication Critical patent/EP3493968A1/fr
Withdrawn legal-status Critical Current

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
    • B29C48/30—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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/16—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
    • B29C48/256—Exchangeable extruder parts
    • B29C48/2566—Die parts
    • 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
    • B29C48/3363—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 layered die, e.g. stacked discs

Definitions

  • the invention relates to a multilayer blown head for a blown film plant, a blown film plant and a process for operating a blown film plant.
  • the invention relates to a blown head for a blown film plant, for forming a multi-layered annular melt stream in an annular channel and for releasing the melt stream from a Ringschlitzdüse to form a film tube, a blown film plant with such a blown head and a method for operating a blown film plant for forming a multi-layered annular melt stream in an annular channel and for the escape of the melt stream from a Ringschlitzdüse to form a film tube.
  • the blow head as the extrusion tool is the "heart" of the blown film extrusion line.
  • the task of the blow head - regardless of its specific design - is the formation of the melt from one or more melt strand or melt strands at the tool entrance to a uniform, thermally and mechanically homogeneous melt distribution above the annular gap-shaped outlet cross-section downstream of the tool outlet.
  • blowing heads commonly used today can be divided into two groups; namely, on the one hand in the group of Axialdietarylverteiler in cylindric or conical shape and on the other hand in the group of radial spiral distributor, also plate coil distributor, spiral distributor or stack called, there are also combined embodiments.
  • blow heads Common to all blow heads is that the melt stream delivered by the extruder is first divided into several individual streams. For this purpose, mainly star and
  • pre-distributors lead into helical channels, which are incorporated either in a mandrel (spiral distributor) or a plate (radial spiral distributor) and these respectively rotate in the form of a multi-thread.
  • the region in which a tubular channel from the pre-distributor opens into the corresponding helix or spiral is referred to as "gusset region.”
  • the gusset region as it is carried out in the prior art, is described with reference to an axial helical distributor with vertical Axis - characterized by a predominantly horizontally extending edge between the helical channel and the usually smooth outer tool part, which extends with the helical channel up to the direction of rotation of the helical channel first overlap with the adjacent to the direction of rotation of the helical channel spiral channel
  • the corner When viewed in cross-section, the corner is seen to be generally smooth in the outer part of the mold. In this corner, there are significantly lower wall shear stresses than in the round regions of the helical channel, as a result of which a comparatively long residence time of the melt occurs in this region.
  • a predominantly vertically extending edge which extends at the beginning of the overlap between a first and a second helical channel, seen in the direction of rotation of the first helical channel, immediately before this, extending in the axial direction.
  • This edge forms the boundary of the flow channel at the beginning of the web between the two previously mentioned coils.
  • the volume flow that flows through this web between the two coils is low and is additionally delayed in the area of the edge.
  • EP 1 784 297 B1 proposes, in multi-layer blower heads with axial distributor for multilayer films, to place the spiral distributor of the inner melt channel on the inner boundary wall with respect to the center axis of the film blowing head and to arrange the spiral distributor on the outer boundary wall in relation to the center axis of the film blowing head.
  • the invention has for its object to provide the prior art an improvement or an alternative.
  • the object solves a blowing head for a blown film plant, for forming a multi-layered annular melt stream in an annular channel by means of several leading in the direction of annular channel helical coulters, and for allowing the melt flow from a Ringschlitzdüse to form a film tube, wherein the annular channel leading in a direction of extrusion to Ringschlitzdüse, with a distributor plate package, which forms a pre-distributor, a helical coulter and a distributor plate channel, wherein in a distribution flow direction, the pre-distribution over the helical coulter and the distributor plate channel leads into the annular channel, wherein the helical coulter has a helical channel exit direction which is parallel to the extrusion direction in or opposite to the extrusion direction, wherein a first set of spirals with respect to the extrusion direction of the die at least partially upstream of a first Distributor plate channel is arranged
  • melt stream is a matter stream of a melted thermoplastic.
  • a melt stream may be monolayered or multi-layered.
  • a film-shaped melt stream is also referred to as a "melt film”.
  • a "ring channel” is an annular channel inside a blow head of a blown film plant, which collects the melt stream of a distributor plate after its mouth into the ring channel or the melt streams of several distributor plates after their mouths in the annular channel and leads to the annular slot nozzle of the blow head
  • a ring channel can be arranged radially outside a distributor plate, within a distributor plate or both outside and inside deviating distributor plates.
  • a “helix” is a spiral and is distinguished between cylindrical spirals which extend in the axial direction of a cylinder or in the axial direction of a pointed cone and are also referred to as “axial helix” and substantially radially extending spirals, which are referred to as “radial helix” Coils often appear in droves, and when helices occur in droves, they are also called “helical cohorts", in particular "radial coulters” or “axial coulters”.
  • a "ring slit nozzle” is a component or an assembly through which a melt stream leaves the blow head of the blown film line
  • a ring slit nozzle may have segmented actuators which make the thickness of the melt stream adjustable during operation of the blow head.
  • a “film tube” is a tube-shaped film made of plastic, which leaves a blown head of a blown film line in the extrusion direction.
  • extrusion direction is the direction in which a designated melt stream exits the ring-slot die Typically, today an extrusion direction is oriented vertically opposite to the direction of gravity action.
  • a “distributor plate”, also referred to as a “plate” is a component of a blown head of a blown film plant, which by its shaping, in particular by the shape of the distribution channels, a designated melt flow from Verteilerplatteneintritt in "distribution flow direction" leads to Verteilerplattenaustritt, the melt stream over the Pre-distributor, a spiral distributor and a distribution channel passes, wherein the designated melt stream is distributed so that it leaves the distributor plate as a substantially homogeneous, continuous melt film.
  • a "pre-distributor” is a geometry that pre-distributes a melt stream coming from the extruder, ie divides it into several isolated melt streams.
  • a fishtail distribution can have a deer antler distribution, holes from a central region of the die, a different design or a combined design.
  • a “helix distribution” has a “helical coulter”.
  • a “helical coulter” extends in such a way that, apart from an ever present circumferential direction, a melt flow preferably proceeds in the radial or axial direction.
  • An "axial helix distributor” may, in particular, have a helical distribution with a spiral helix distribution, with a different design or a combined design.
  • a “radial helix distribution” has a “radial helix”.
  • a “radial spiral coulter” is a helical coulter which extends in such a way that, apart from a circumferential direction which is always present, a melt flow preferably proceeds in the radial direction.
  • a manifold plate kana is a gap between a distributor plate and another component of the blow head for a blown film system or a gap between two distributor plates, which is designed to be flowed through by a designated melt stream.
  • a designated melt stream leaves a distributor plate as a homogeneous continuous melt film.
  • the distributor plate channel is fed from the helical coulter.
  • the "distribution flow direction" is a fictitious direction, and it is certainly more than questionable whether every single particle in the flowing melt will actually flow exactly in the distribution flow direction Plate coil distributor mainly oriented radially.
  • the distribution flow direction can point outwards or inwards.
  • the manifold plates of a manifold plate package may be connected to one or more melt feeds, in particular, different melt streams may be directed to the individual manifold plates such that the manifold plate package is configured to provide a manifold
  • the different melt layers, when the manifold plates are connected to different manifolds, may have different starting materials so that the manifold plate package may be configured to produce a multilayer melt film.
  • a "distributor plate entry" is the point at which a designated melt flow enters the distributor plate, but most of the entry plate entry is a bore, but a distributor plate entry may be deviating.
  • a manifold exit is the place where a designated melt stream exits the manifold plate, and most of the manifold exit is designed so that a designated melt stream radially leaves the distributor plate in a ring-shaped channel exit direction is the idealized exit direction of a designated melt stream from a helical channel.
  • the spiral channel exit direction always runs parallel to the extrusion direction. Whether each individual particle in the flowing melt will actually flow exactly in the spiral channel exit direction is certainly more than questionable.
  • the distribution flow direction should therefore be understood here as a purely geometric, theoretical direction.
  • the spiral channel exit direction can be oriented in or against the extrusion direction.
  • downstream is meant "toward the exit of the designated melt stream from the annular slot die".
  • a "gusset area” is the area in which the designated melt stream flows through the outlets of the predistributor into the helical manifold.
  • a component on the opposite side of a distributor plate of a distribution plate package in particular a deviating distributor plate or a deviating component, for a helical distributor, wherein a part of the helical distributor is machined out of the opposite side of a distributor plate.
  • the helical coil is positioned at least partially downstream of the distributor plate channel with respect to the extrusion direction of the die, such that the helical lay deposits its layer of designated melt stream against the extrusion direction onto the designated melt stream in the distributor plate channel.
  • a distributor plate package is designed such that different layers of a designated melt stream from different helical channel exit directions are placed.
  • the respective outermost layers of a designated melt stream are respectively placed from the outside, so the Wendelkanalaustrittslegien the responsible for the outermost layers of the designated melt flow coil distributor are oriented at least partially in the direction of the designated melt flow.
  • it can thereby be achieved that, with suitable operating parameters, an occurrence of helical strips can be prevented or at least greatly reduced in its expression.
  • the second set of spirals is preferably predominantly, preferably completely, arranged downstream of the distributor plate channel with respect to the extrusion direction.
  • a "volume view" of an expression designates a test of an expression according to the criterion of the volume.
  • both the distributor plate and the opposite side of a distributor plate can have a part of the second set of spirals. With reference to the total worked volume of the second spiral coil, this is predominantly, preferably completely, arranged downstream of the distributor plate channel with respect to the extrusion direction of the blow head.
  • the second set of spirals is predominantly, preferably completely, disposed downstream of the distributor plate channel in relation to the extrusion direction, ie, on the opposite side of a distributor plate in a course of the channel path.
  • a "channel course” describes the route of a course of a channel.
  • a "channel course view" of a characteristic denotes a test of an expression according to the criterion of the channel progression path.
  • both the distributor plate and the opposite side of a distribution plate can have a part of the second set of spirals. With reference to the channel path profile of the second helical coulter, this is predominantly, preferably completely, arranged downstream of the distributor plate channel, ie on the opposite side of a distributor plate, with respect to the extrusion device of the blowing head.
  • the second set of spirals is located in a Kanalverlaufumblenbetrachtung at least a last third of the channel course downstream of the Verteilerplattenkanals, preferably at least a second half, in particular the entire channel course.
  • both the distributor plate and the opposite side of a distribution plate can have a part of the second set of spirals.
  • at least a last third of the channel course preferably at least a second half of the channel course, in particular the entire channel course in relation to the extrusion direction of the Blaskopfs downstream of the distributor plate channel, ie on the opposite side of a distributor plate.
  • the distributor plate package consists of plates stacked in the direction of extrusion, wherein in any case the downstream plate of the distributor plate packet with respect to the extrusion direction has a helical coulter as recesses.
  • a "recess” refers to a local depression of a component geometry
  • Examples of a recess are the geometry of a helical distributor or the geometry of a distributor plate channel, which are machined from a distributor plate.
  • the distributor plate package consists of plates stacked in the direction of extrusion, wherein in any case the downstream plate of the distributor plate packet with respect to the extrusion direction has the helical coulter and the distributor plate channel as recesses.
  • both the helical coulter and the distributor plate channel are incorporated into the opposite side of a distributor plate.
  • the plate of the distributor plate package which is downstream in relation to the direction of extrusion forms the channel lying in the extreme in relation to the annular channel.
  • the housing of the blowing head of the blown film plant also forms the channel that is located at the extreme in relation to the annular channel.
  • the blow head has a further distributor plate package.
  • this makes it possible to achieve different layer thicknesses of the melt stream with different distributor plate packages.
  • a distributor plate package can be designed specifically for a specific functional layer in the designated film.
  • this can be achieved in that the expression of functional properties of the film can be improved.
  • blowhead in addition to the above-described distributor plate package on a Axialwendelverteilerteil.
  • An "axial spiral distributor” is an axially extending design of a distribution, in particular an axial distribution, ie a geometry in the inner and / or on the surface of a mandrel, which distributes a designated melt stream so that it has as homogeneous properties as possible downstream of the mandrel.
  • An "axial coil distributor part” is a component or assembly that forms an axial coil distributor.
  • this can be achieved by constructing different layers of the film with the optimally suitable distributor type.
  • the construction concept of a mixed distributor can bring geometric advantages.
  • the necessary installation space and / or the necessary use of material for a corresponding blow head can be reduced.
  • the above-described distributor plate package is in one of the above-described embodiments, which may also be an embodiment combined from the individual described features, on top.
  • this can be achieved by improving the accessibility to the distribution package.
  • a change or a repair or maintenance can be performed faster.
  • the object is achieved by a blown film system having a blow head according to a first aspect of the invention.
  • a blown die for a blown film line for forming a multi-layered annular melt stream in an annular channel by means of a plurality of helical flocks leading to the annular channel, and for allowing the melt flow to exit from a ring slot die to form a film tube, wherein the annular channel in an extrusion direction leading to the annular slot nozzle, with a distributor plate package which forms a pre-distributor, a helical coulter and a Verteilerplat- tenkanal, wherein in a distribution flow direction, the pre-distribution over the helical coulter and the distributor plate channel leads into the annular channel, wherein the helical coulter has a helical channel exit direction which parallel to the extrusion direction in o- which is opposite to the extrusion direction, wherein a first set of spirals with respect to the extrusion direction of the blow head at least partially upstream of a first distributor plate channel is arranged,
  • the object solves a method for operating a blown film plant for forming a multilayer annular melt stream in an annular channel by means of several leading annular channel helical coulters, as well as to exit the melt stream through a Ringschlitzdüse to form a film tube, wherein the annular channel in a Extrusion direction leads to Ringschlitzdüse, wherein the layers of the film tube are produced with a distributor plate package and melt is passed through a respective pre-distributor, a helical coulter and a distributor plate channel, wherein in a distribution flow direction, the pre-distribution over the helical coulter and the distributor plate channel in the annular channel, wherein the melt is guided by a helical coulter in a helical channel exit direction parallel to the extrusion direction in or against the ex
  • the melt is guided at least in part downstream of the distributor plate channel by the helical coulter with respect to the extrusion direction of the blow head, so that the helical coil deposits its layer of the melt stream against the extrusion direction onto the melt in the distributor plate channel.
  • the helical coil deposits its layer of the melt stream against the extrusion direction onto the melt in the distributor plate channel.
  • FIG. 1 shows schematically in a radial section one half of a plate distributor with spiral spiral distributors, in which melt is fed externally into helical channels and an annular melt stream is generated, and
  • Fig. 2 shows schematically in a radial section one half of a blowing head of two distributor plate packages with spiral spiral distributors, in which melt is fed externally into helical channels and an annular melt stream is generated.
  • the distributor plate package 1 in FIG. 1 consists essentially of a first distributor plate 2, a second distributor plate 3 and a counter plate 4.
  • the distributor plates 2, 3 are horizontal, just like the counter plate 4.
  • All edges of the helical coulters 5, 6 and the edges of the distributor plates 2, 3 and the counterplate 4, which come into contact with the designated melt stream, may be rounded (not shown) with regard to the risk of flow separation in the distributor plate package 1.
  • Verteilerplattenp 1 the plastic melt in operation, starting from Vorverteilerkanälen 7, 8 in the beginnings of helical coulters 9, 10 passed.
  • a distributor flow direction 11 which lies radially toward a central axis 12, while the central axis 12 is parallel with an extrusion direction 13, a channel depth of the spiral coulters 5, 6 decreases, whereby a distributor plate channel 14, 15 in the course of the distributor flow direction 11 gets bigger.
  • a helical channel exit direction 16 of the designated melt of the first distributor plate 2 runs parallel to the direction and in the direction of the extrusion direction 13, the helical coulter 5 of the first distributor plate 2 lying upstream of the distributor plate channel 14.
  • a spiral channel exit direction 17 of the designated melt of the second distributor plate 3 runs parallel to the direction and counter to the direction of the extrusion direction 13, wherein the helical coulter 6 of the second distributor plate 3 lies downstream of the distributor plate channel 15.
  • a blowing head 30 in FIG. 2 consists essentially of a first distributor plate pack 31 and a second distributor plate pack 32, wherein the distributor plate packs run horizontally.
  • the first distributor plate package 31 consists essentially of three distributor plates 33, 34, 35 and a counter plate 36.
  • the second distributor plate package 32 also essentially consists of three distributor plates 37, 38, 39 and a counter plate 40.
  • a channel depth of the coil coulters 41, 42, 43, 44, 45, 46 decreases, wherein a distributor plate channel (schematically indicated, not numbered) in the course of the distribution current 47 becomes larger.
  • the distributor plate packs 31, 32 are fed in operation with plastic melt starting from pre-distributor channels (not shown) in the distributor plates 33, 34, 35, 37, 38, 39.
  • the designated plastic melt passes over the beginnings of the helical shears (not shown) into the helical coulters 41, 42, 43, 44, 45, 46.
  • a helical channel exit direction 50 of the designated melt of the distributor plates 33, 34, 35, 37, 38 runs parallel to the direction and in the direction of the extrusion direction 49, the helical coulters 41, 42, 43, 44, 45 (identified by way of example) of the distributor plates 33 , 34, 35, 37, 38 are located upstream of the respective distributor plate channels (indicated schematically, not numbered).
  • a spiral channel exit direction 51 of the designated melt of the distributor plate 39 via the helical coulters 46 in the counterplate 40 runs parallel to the direction and counter to the direction of the extrusion direction 49, wherein the helical coulters 46 (exemplified) of the distributor plate 39 downstream of the associated distributor plate channel 52 (schematically indicated) , List of reference numbers used

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

Abstract

L'invention concerne une tête de soufflage multicouche destinée à un système de soufflage de film, un système de soufflage de film, ainsi qu'un procédé permettant de faire fonctionner un système de soufflage de film. Selon l'invention, un élément est intégré sur le côté opposé d'une plaque de distributeur d'un ensemble de plaques de distributeur d'un distributeur hélicoïdal, une partie du distributeur hélicoïdal étant produite à partir du côté opposé d'une plaque de distributeur. La tête de soufflage objet de l'invention, servant à former un flux de matière en fusion multicouche, permet d'empêcher pour des paramètres de fonctionnement appropriés la production de bandes hélicoïdales, ou du moins d'en réduire considérablement l'effet.
EP17732286.4A 2016-08-04 2017-05-10 Tête de soufflage multicouche pour système de soufflage de film, système de soufflage de film, ainsi que procédé permettant de faire fonctionner un système de soufflage de film Withdrawn EP3493968A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016009407 2016-08-04
DE102017002274.7A DE102017002274A1 (de) 2016-08-04 2017-03-10 Mehrschichtblaskopf für eine Blasfolienanlage, Blasfolienanlage sowie Verfahren zum Betreiben einer Blasfolienanlage
PCT/DE2017/000124 WO2018024267A1 (fr) 2016-08-04 2017-05-10 Tête de soufflage multicouche pour système de soufflage de film, système de soufflage de film, ainsi que procédé permettant de faire fonctionner un système de soufflage de film

Publications (1)

Publication Number Publication Date
EP3493968A1 true EP3493968A1 (fr) 2019-06-12

Family

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Application Number Title Priority Date Filing Date
EP17732286.4A Withdrawn EP3493968A1 (fr) 2016-08-04 2017-05-10 Tête de soufflage multicouche pour système de soufflage de film, système de soufflage de film, ainsi que procédé permettant de faire fonctionner un système de soufflage de film

Country Status (7)

Country Link
US (1) US20190263041A1 (fr)
EP (1) EP3493968A1 (fr)
CN (1) CN109562552A (fr)
BR (1) BR112019001851A2 (fr)
CA (1) CA3031850A1 (fr)
DE (2) DE102017002274A1 (fr)
WO (1) WO2018024267A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR102077613B1 (ko) * 2019-09-23 2020-02-17 주식회사 디에스아이 저압발포기 배출헤드

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WO2015149163A1 (fr) * 2014-04-03 2015-10-08 Macro Technology Ltd. Filière de co-extrusion avec canal d'alimentation rectangulaire

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CN109562552A (zh) 2019-04-02
DE112017003881A5 (de) 2019-04-18
WO2018024267A1 (fr) 2018-02-08
BR112019001851A2 (pt) 2019-05-07
DE102017002274A1 (de) 2018-02-08
US20190263041A1 (en) 2019-08-29
CA3031850A1 (fr) 2018-02-08

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