WO2012069186A1 - Procédé et dispositif permettant la fabrication d'un extrudat - Google Patents

Procédé et dispositif permettant la fabrication d'un extrudat Download PDF

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Publication number
WO2012069186A1
WO2012069186A1 PCT/EP2011/005895 EP2011005895W WO2012069186A1 WO 2012069186 A1 WO2012069186 A1 WO 2012069186A1 EP 2011005895 W EP2011005895 W EP 2011005895W WO 2012069186 A1 WO2012069186 A1 WO 2012069186A1
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WO
WIPO (PCT)
Prior art keywords
roller
roll
induction
passive
active
Prior art date
Application number
PCT/EP2011/005895
Other languages
German (de)
English (en)
Inventor
Walter Breyer
Original Assignee
Breyer Gmbh
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 Breyer Gmbh filed Critical Breyer Gmbh
Publication of WO2012069186A1 publication Critical patent/WO2012069186A1/fr

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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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/06—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using radiation, e.g. electro-magnetic waves, induction heating
    • B29C33/065—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using radiation, e.g. electro-magnetic waves, induction heating in rolls, calenders or drums
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/24—Calendering
    • B29C43/245—Adjusting calender parameters, e.g. bank quantity
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • 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
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • 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
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/35—Extrusion nozzles or dies with rollers
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/91—Heating, e.g. for cross linking
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0811—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using induction
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • B29C2043/522—Heating or cooling selectively heating a part of the mould to achieve partial heating, differential heating
    • 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
    • B29C2948/92076—Position, e.g. linear or angular
    • 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
    • B29C2948/92704—Temperature
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/008—Wide strips, e.g. films, webs

Definitions

  • the invention relates to a method for producing an extrudate, in particular flat sheet goods according to the features of the preamble of claim 1, as well as a corresponding device for carrying out the method according to the features of the preambles of claims 6 and 7.
  • CONFIRMATION COPY Roll temperatures can not be higher than the sticking temperature of the plastic to be processed.
  • Adhesive temperature means in this case the temperature of the plastic, above which it sticks to the previous roller during the transition of the web from one to the next roller and below which the transition to the following roller is reliably ensured.
  • the rolls are generally tempered homogeneously in calenders, calenders or similar devices. This means they have the same temperature over the circumference and across the width. For the process of film or board making, this means that the selected roll temperature must be below the above-defined bonding temperature at the time the film leaves the roll, and thus also at the time the sheeting or sheet passes Roller initially touched.
  • the idea underlying the present invention is to transfer the variothermic process control of injection molding to the field of film and sheet extrusion. Also in the extrusion, the difficulty in the molding of microstructured rolls, the microstructure is completely transferred to the film or plate. Because even here, the melt freezes on the surface as soon as it touches the cold roller, and thus no longer flows into the microstructures.
  • the transfer of variothermal process control to the extrusion process means that the roll must have a temperature above the sticking temperature when impinging the film (to improve the molding of the microstructures), while at the time of peeling the film, it should be below the temperature Sticking temperature must have (so that it dissolves safely and without sticking from the roller).
  • DE 2 039 359. discloses a roller which is heated by induction via an inductor from the outside and cooled by a cooling medium in the interior. Since the heating is carried out over the circumference only at one point, the cooling, however, is active over the entire circumference, it is possible with the device according to DE 2039359 to achieve an oscillating roller temperature.
  • the inductor is mounted in the region in front of the retracting gap, that is to say also in front of the location of the impact of the film or plate.
  • JP 2010/017943 discloses an inductively heated roller for the film extrusion process of plastics.
  • the aim of this invention is to produce a temperature that differs across the width, which is homogenous over the circumference and does not change over time.
  • the inductor is tangentially wound around the roll in various sections. The aim is that the thickness and the surface properties of the film over the width are carried out more uniformly.
  • the object of the invention is the o.g. Disadvantages to fix or at least minimize.
  • the roll shell is to be heated only in a circular arc section running parallel to a roll axis.
  • the roller must therefore have an oscillating wall temperature.
  • the temperature of the surface swings each time the roller between a temperature above the melt temperature (impingement of the film or plate) and a temperature below the sticking temperature (peeling of the film or plate).
  • the task and solution includes the technological implementation of the oscillating roller temperature.
  • a method and a device are provided with which it is possible to achieve a high frequency and amplitude of the temperature oscillation and to oscillate only the near-surface layers of the roll mantle in an oscillating manner.
  • a circular arc section includes an angle between 1 ° and 90 °, more preferably an angle between 5 ° and 45 °, and most preferably an angle between 10 ° and 30 °.
  • the roll seen radially, divided into circular arc segments and these are filled with a heat-carrying medium.
  • the arrangement of axially parallel running or looped hoses or pipes, which are flowed through by a heat-carrying medium are many possibilities conceivable and should be encompassed by the invention.
  • inductive heating is preferred.
  • the roll shell and / or the roll surface is cooled in other circular arc sections.
  • the device comprises only one active roller.
  • active roll always means a roll which comprises an induction heater which is suitable for at least partially heating a roll jacket of the active roll.
  • this roll shell of the active roll comprises a ferromagnetic material which is suitable to be heated inductively.
  • the active roller preferably has a drive. From the idea of the invention is also included that the active roller does not have its own drive, but is driven by other rollers. The embodiment with only a single active roller is particularly suitable for cast film extrusion.
  • the device preferably also comprises a passive roller in addition to at least one active roller.
  • the term "passive roller" always means a roller which does not comprise a heater which is suitable for heating the surface of the passive roller or other rollers at least in certain areas. However, it is entirely within the scope of the invention that the passive roller can be uniformly tempered over its entire circumference.
  • the device for carrying out the o. G. Procedure an induction roller.
  • induction roller in the following means a roller which comprises an induction heater, which at least partially inductively heats a roller surface of another of the induction rollers associated with the induction rollers.
  • the device expediently comprises, in addition to the induction roller, a passive roller with a roller surface which forms a nip with the induction roller and which can be heated in sections by the induction roller.
  • the induction heating of the induction roller generates an electromagnetic field.
  • the electromagnetic field is generated so that it lies in the region of the nip. This results in the advantage that the roller surface of the passive rollers in the nip passes through the electromagnetic field or is in the electromagnetic field and is inductively heated.
  • the induction roller may also generate an electromagnetic field that is concentric with a center of the roller axis. This results in the advantage that a plurality of passive rollers, combined with the induction roller, and whose arcuate sections, which form a nip with the induction roller, can be heated inductively.
  • the induction heating is arranged along a parallel of a roll axis.
  • the induction heater preferably has a plurality of conductor loops.
  • the conductor loops can be connected in such a way that individual arc sections can be heated with the induction heating.
  • each of the conductor loops has its own power connection. This results in the advantage that the induction heating can be heated in a circular arc section. This results in the advantage that only a selective heating of the roll shell in the desired circular arc sections is possible. This results in the advantage that the desired optimum oscillating temperature distribution can be achieved.
  • the device has an incremental iron.
  • the incremental iron is suitable for detecting an angular position of the induction heating. This results in the advantage that the induction heating or the individual conductor loops of the induction heating can be activated so that only certain circular arc sections are heated. Particularly preferred are heated only arc sections that form the nip with. This results in the advantage that a temperature distribution is achieved according to the optimum desired oscillating roller temperature.
  • the roll shell and / or the roll surface of the active roll includes ferromagnetic elements suitable to be heated by the induction heating to a temperature.
  • the roller surface of the passive roller includes ferromagnetic elements suitably heated by the induction roller to a maximum temperature.
  • the device comprises a cooling.
  • the cooling is suitable for cooling the roll shell or the roll surface of the active roll and / or the passive roll, in particular outside the nip, to a temperature below the bonding temperature. This results in the advantage that the optimum desired oscillating temperature distribution can be achieved and it is ensured that the temperature of the roll mantle cools to the detachment point so that a detachment of the extrudate is possible.
  • the device comprises a plurality of rollers, preferably three rollers.
  • a first nip is formed by an induction roller and a passive roller.
  • the second nip is formed between the passive roller and an active or another passive roller.
  • the first nip is formed between a passive roll and an active roll.
  • the second nip is then formed between the active roll and another passive roll or another active roll.
  • Figure 1 is a schematic representation of an apparatus for producing flat sheet goods, in particular films, according to the prior art
  • Figure 2 is a development of a roll shell of the apparatus of Figure 1 and an optimal temperature distribution shown above;
  • Figure 3 is a schematic representation of an inventive device for producing sheet-like web products with an active roller and a passive roller;
  • Figure 4 is a schematic representation of another embodiment of an inventive apparatus for producing sheet-like web products with an induction roller and a passive roller
  • Figure 5 is a schematic representation of another embodiment of an inventive device for producing sheet-like web products with an active roller as the only roller;
  • Figures 6 to 9 are schematic representations of possible embodiments of inventive devices with a plurality of rollers in different combinations of passive rollers, active rollers and / or induction rollers;
  • FIG. 10 is a schematic perspective view of an induction heater with a plurality of conductor loops for an active roller and / or an induction roller.
  • FIG. 1 shows a device 1 for producing flat sheet goods from an extrudate 2 according to the prior art.
  • the device 1 comprises a first passive roller 3.1 and a second passive roller 3.2.
  • Passive roller is meant in the following that the roller does not have its own heating device which is suitable for oscillatingly heating a roll shell.
  • the two passive rollers 3.1 and 3.2 include a nip 4.
  • the extrudate 2 is introduced by means of a nozzle 5.
  • the rollers 3.1 and 3.2 can be driven and adjusted to each other.
  • the flat web 2 separates from the roller 3.1 and is then transferred to a further, not shown, processing device or further roller combination.
  • a position of the detachment point 6 on a circumference of the roller 3.1 depends in particular on the further processing and positioning of the subsequent processing stations.
  • Figure 2 shows a development of a surface of the roller 3.1 with a corresponding optimum desired temperature distribution in order to achieve optimum product properties and impressions of the extrudate 2.
  • a roller revolution is specified.
  • the unit of measurement "1" corresponds to a complete roller revolution of 360.degree ..
  • the optimum desired temperature of the roller shell of the roller 3.1 is plotted in the Y direction.
  • the surface of the roller 3.1 in the nip 4 should have the highest temperature, namely T max .
  • the temperature T max is above the melting temperature T s of the material to be processed.
  • a temperature T m j n should be below a sticking temperature T K , in order to optimally detach the web from the roller and optimal To achieve impression results.
  • T G glass transition temperature
  • Such an optimal temperature distribution according to the diagram of Figure 2 can be achieved by one of the inventive devices 1.1 to 1.7, as shown in Figures 3 to 9.
  • the device 1.1 according to FIG. 3 comprises a passive roller 3 and an active roller 7.
  • the active roller 7 and the passive roller 3 form the nip 4.
  • the passive roller 3 rotates about a central axis N.
  • the active roller 7 rotates about a central axis M and has a roller shell 9 with a roller surface made of ferromagnetic material, which encloses an induction heater 8.
  • the induction heater 8 is shown in a perspective schematic representation of Figure 10 in more detail. It shows the active roller 7 without the roll shell 9, so that the induction heater 8 is clearly visible.
  • the active roller 7 is viewed radially or in cross-section, divided into a plurality of circular arc sections.
  • each arc section includes an angle between and 90 °, more preferably between 5 ° and 45 ° and more preferably between 10 ° and 30 °.
  • three circular arc sections 10.1, 10.2 and 10.3 can be seen.
  • a separate conductor loop is laid in each of the circular arc sections 10.1.
  • the conductor loop 11.1, in the circular arc section 10.2, the conductor loop 11.2 and in the circular arc section 10.3, the conductor loop 11.3 is arranged.
  • Each of the conductor loops has a separate terminal 12, so that an electric current for generating an electromagnetic field can be applied to each conductor loop independently of other conductor loops, individually or briefly overlapping for a short time.
  • the conductor loops 11.1 to 11.3 are arranged in the axial direction along the active roller 7.
  • the conductor loops 1 .1 to 1 .3 are arranged along a parallel to the central axis M of the active roller 7.
  • the device 1.1 also comprises the nozzle 5 for introducing the extrudate 2 into the nip 4.
  • an incremental encoder assigned to a shaft of the roller 7, so that it is detected in which position the roller is currently located. As a result, it can be detected by a control which of the arcuate sections just forms the nip 4 and is to be heated.
  • the mode of operation of the device 1.1 according to FIG. 3 is as follows: The extrudate 2 or the flat web material is introduced into the nip 4 of the device 1.1 with the nozzle 5.
  • the circular arc section of the roll mantle 9 of the active roll 7, which forms the nip 4 according to the incremental rotary encoder (not shown), is heated by means of the induction heater 8 so that an oscillating roll jacket temperature according to FIG. 2 results.
  • the active roll 7 may comprise a cooling, not shown.
  • FIG. 4 shows a further exemplary embodiment of a device 1.2 according to the invention.
  • the device 1.2 comprises an induction roller 13 with a central axis O and the passive roller 3.
  • the induction roller 13 and the passive roller 3 form the nip 4 from.
  • the device 1.2 also comprises the nozzle 5 by means of which the extrudate 2 is introduced into the nip 4.
  • the induction roller 13 includes an induction heater 14. It can be constructed analogously to the induction heating 8 of the active roller 7 of Figure 10, but without a ferromagnetic roll shell. Alternatively, however, the induction heater 14, the induction roller 13 completely encase.
  • a roller surface 15 of the induction roller 13 need not be made of an inductively heatable or ferromagnetic material, because it is not necessary to heat them, but this may also be possible. With the induction roller 13, an electromagnetic field 17 is generated in the nip 4.
  • the induction roller 13 generates an electromagnetic field which is concentric with a circumference of the induction roller 13, thereby a similar effect can be achieved, namely that only heating of the passive roller 3 in the region of the nip 4 takes place.
  • the electromagnetic field 17 in the nip 4 or the region of the electromagnetic field which lies in the nip 4 heats a roller surface 16 of the passive roller 3 inductively.
  • the passive roller 3 of the device 1.2 preferably comprises a cooling, not shown.
  • the roller surface 16 of the roller 3 can be heated and cooled in an oscillating manner according to the temperature distribution shown in FIG.
  • FIG. 5 shows a further device 1.3 according to the invention. It comprises only the active roller 7 with the induction heater 8 and the roll shell 9.
  • the device 1.3 from the single active roller 7 is particularly suitable for cast film extrusion. In cast film extrusion, no second roll is needed.
  • the roll shell 9 of the active roll 7 is heated and cooled by the induction heater 8 and preferably in combination with a cooling, not shown, according to the optimum temperature distribution of FIG.
  • FIGS. 6 to 9 show devices 1.4 to 1.7 with different combinations of active rollers, passive rollers and induction rollers.
  • the device 1.4 according to FIG. 6 comprises the induction roller 13. This forms a first roller gap 4 with a passive roller 3.3.
  • another passive roller 3.6 forms a second roller gap 19 with the passive roller 3.3.
  • the induction roller 13 has the induction heater 14. This generates the magnetic field 17.
  • the extrudate 2 is introduced into the first nip 4 of the device 1.4.
  • the roller surface of the passive roller 3.3 is inductively heated.
  • the device 1.5 comprises an induction roller 13. This forms with the passive roller 3, the first nip 4, in which the extrudate 2 is introduced by means of the nozzle 4, from.
  • the roller surface of the passive roller 3 is heated in the electromagnetic field 17.
  • the device 1.5 comprises as the third roller an active roller 7. This forms the second roller gap 19 with the passive roller 3.
  • the active roller 7 heats its own roll shell.
  • the active roller 7 heats its own roll shell only in the second nip 19.
  • the device 1.6 according to FIG. 8 comprises a passive roller 3.4. This forms with the active roller 7, the first nip 4. Furthermore, the device 1.6 as a third roller comprises a further passive roller 3.5.
  • the induction heater 8 of the active roller 7 is switched so that only circular arc sections, which are located in the nip 4 and in the nip 19, are always heated.
  • the device 1.7 according to FIG. 9 comprises the passive roller 3. This forms the first nip 4 with an active roller 7.1. By means of the induction heater 8 of the active roller 7.1, the surface of the active roller 7.1 is heated in the nip 4.
  • the device 1.7 as third roller comprises a second active roller 7.2. This forms with the active roller 7.1 of the second nip 19. Both rollers are then switched so that the two roller shells are heated only when forming the respective roller gap 4, 19.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant la fabrication d'un extrudat (2), en particulier de produits en bandes plans, notamment de feuilles ou de plaques, le produit en bande plan circulant autour d'au moins un rouleau (3, 7). Selon l'invention, une enveloppe (9) et/ou une surface du rouleau est chauffée au moyen d'un système de chauffage à induction (8) seulement sur une partie en arc de cercle s'étendant parallèlement à l'axe (N, M) du rouleau.
PCT/EP2011/005895 2010-11-26 2011-11-23 Procédé et dispositif permettant la fabrication d'un extrudat WO2012069186A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10201060834.3 2010-11-26
DE102010060834 2010-11-26
DE102011000488A DE102011000488A1 (de) 2010-11-26 2011-02-03 Verfahren zum Herstellen eines Extrudats
DE102011000488.2 2011-02-03

Publications (1)

Publication Number Publication Date
WO2012069186A1 true WO2012069186A1 (fr) 2012-05-31

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PCT/EP2011/005895 WO2012069186A1 (fr) 2010-11-26 2011-11-23 Procédé et dispositif permettant la fabrication d'un extrudat

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DE (1) DE102011000488A1 (fr)
WO (1) WO2012069186A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019117300A1 (fr) * 2017-12-15 2019-06-20 三菱ケミカルエンジニアリング株式会社 Dispositif tambour de coulage et procédé de fabrication de film/feuille de résine synthétique mettant en oeuvre ledit dispositif
CN112895374A (zh) * 2021-02-07 2021-06-04 云南长宜科技有限公司 一种气流单元的制备方法及装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1038671B (de) * 1952-06-04 1958-09-11 Georges Ardichvili Regelbare Einrichtung zur Erwaermung umlaufender Walzen aus ferromagnetischem Werkstoff
DE2039359A1 (de) 1969-08-11 1971-03-04 Kuraray Co Verfahren und Einrichtung zum Erhitzen und Kuehlen von Plastikmaterial
DE3429695A1 (de) * 1984-08-11 1986-02-13 Küsters, Eduard, 4150 Krefeld Verfahren zur erzielung eines temperaturprofils im bereich hoher temperaturen an beheizten walzen und entsprechende walzeinrichtung
DE3920171A1 (de) * 1988-12-21 1990-07-05 Escher Wyss Ag Walze mit einem rotierbaren walzenmantel und verfahren zu deren betrieb
DE102004044981A1 (de) * 2004-01-30 2005-08-18 Kark Ag Vorrichtung und Verfahren zum Formen eines Folienbandes
DE102006012398A1 (de) * 2005-03-17 2006-09-28 Toshiba Kikai K.K. Heiz- und Kühlwalze
US20090297649A1 (en) * 2008-05-28 2009-12-03 Takayoshi Sano Sheet film forming roll, sheet film casting apparatus, fine pattern transferring apparatus and sheet film
US20090297777A1 (en) * 2008-05-28 2009-12-03 Takayoshi Sano Touch roll, main roll, sheet film casting apparatus, fine pattern transferring apparatus and sheet film
JP2010017943A (ja) 2008-07-11 2010-01-28 Hitachi Zosen Corp 薄膜状樹脂成形用押さえロール

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1038671B (de) * 1952-06-04 1958-09-11 Georges Ardichvili Regelbare Einrichtung zur Erwaermung umlaufender Walzen aus ferromagnetischem Werkstoff
DE2039359A1 (de) 1969-08-11 1971-03-04 Kuraray Co Verfahren und Einrichtung zum Erhitzen und Kuehlen von Plastikmaterial
DE3429695A1 (de) * 1984-08-11 1986-02-13 Küsters, Eduard, 4150 Krefeld Verfahren zur erzielung eines temperaturprofils im bereich hoher temperaturen an beheizten walzen und entsprechende walzeinrichtung
DE3920171A1 (de) * 1988-12-21 1990-07-05 Escher Wyss Ag Walze mit einem rotierbaren walzenmantel und verfahren zu deren betrieb
DE102004044981A1 (de) * 2004-01-30 2005-08-18 Kark Ag Vorrichtung und Verfahren zum Formen eines Folienbandes
DE102006012398A1 (de) * 2005-03-17 2006-09-28 Toshiba Kikai K.K. Heiz- und Kühlwalze
US20090297649A1 (en) * 2008-05-28 2009-12-03 Takayoshi Sano Sheet film forming roll, sheet film casting apparatus, fine pattern transferring apparatus and sheet film
US20090297777A1 (en) * 2008-05-28 2009-12-03 Takayoshi Sano Touch roll, main roll, sheet film casting apparatus, fine pattern transferring apparatus and sheet film
JP2010017943A (ja) 2008-07-11 2010-01-28 Hitachi Zosen Corp 薄膜状樹脂成形用押さえロール

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019117300A1 (fr) * 2017-12-15 2019-06-20 三菱ケミカルエンジニアリング株式会社 Dispositif tambour de coulage et procédé de fabrication de film/feuille de résine synthétique mettant en oeuvre ledit dispositif
JP2019107787A (ja) * 2017-12-15 2019-07-04 三菱ケミカルエンジニアリング株式会社 キャスティングドラム装置およびこのキャスティングドラム装置を用いた合成樹脂フィルム・シートの製造方法
CN112895374A (zh) * 2021-02-07 2021-06-04 云南长宜科技有限公司 一种气流单元的制备方法及装置

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