EP1654106A1 - Dispositif pour calibrer un profile extrude en plastique presentant au moins une rainure longitudinale - Google Patents

Dispositif pour calibrer un profile extrude en plastique presentant au moins une rainure longitudinale

Info

Publication number
EP1654106A1
EP1654106A1 EP04736369A EP04736369A EP1654106A1 EP 1654106 A1 EP1654106 A1 EP 1654106A1 EP 04736369 A EP04736369 A EP 04736369A EP 04736369 A EP04736369 A EP 04736369A EP 1654106 A1 EP1654106 A1 EP 1654106A1
Authority
EP
European Patent Office
Prior art keywords
coolant
cooling channel
receiving recess
flow
closure pieces
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Withdrawn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
EP04736369A
Other languages
German (de)
English (en)
Inventor
Dietmar Gruber
Erwin KRUMBÖCK
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.)
Gruber and Co Group GmbH
Original Assignee
Gruber and Co Group 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 Gruber and Co Group GmbH filed Critical Gruber and Co Group GmbH
Publication of EP1654106A1 publication Critical patent/EP1654106A1/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Withdrawn legal-status Critical Current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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
    • 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
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • 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
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • 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

Definitions

  • Device for calibrating an extruded at least one longitudinal groove forming plastic profile
  • the invention relates to a device for calibrating an extruded, at least one longitudinal groove forming plastic profile with a receiving from a shaping profile nozzle profile strand receiving the calibration body, which extends in the direction of passage of the profile strand, engaging in the longitudinal groove of the profile strand with a cooling channel as well as transverse to the mold approach, the cooling channel of which has intersecting coolant holes.
  • the hot profile strand emerging from a shaping profile nozzle is calibrated and cooled.
  • This cooling is particularly important in the inlet area of the calibration device, because the friction between the hot profile strand and the calibration body receiving this profile strand depends on the temperature of the calibration body in the area of the calibration surfaces which contact the profile strand. If this temperature rises above a critical value of usually 50 to 70 ° C, the frictional forces exceed the tensile strength of the not yet solidified profile strand, which can then no longer be removed.
  • the calibration body that receives the hot profile strand must consequently be well cooled in the inlet area, which naturally causes difficulties where the cross section of the calibration body does not permit generously dimensioned cooling channels.
  • the cooling channels with their separate connections in the area of the shape approaches of the calibration body are complex not only in terms of construction, but also in terms of maintenance. Due to the unavoidable contamination of the coolant, usually water, the flow cross-section may be narrowed and the mold approaches may therefore be insufficiently cooled. This means that the cooling channels in the area of the mold attachments have to be opened regularly, which is expensive in the provided front closures because these closures consist of pressed-in or glued-in closure plugs which become unusable when removed.
  • the invention is therefore based on the object to design a device for calibrating an extruded plastic profile of the type described in such a way that the design effort required with the provision of cooling channels in the area of the molding approaches can be significantly reduced.
  • the maintenance of these cooling channels is also to be simplified.
  • the invention solves this problem in that the cooling channel open at both ends is connected via a continuous slot with a through the calibration body in the direction of passage, extending into the area of the coolant holes receiving recess for insertable from the open end pieces, the connection openings form the flow connection between the cooling channel and the associated coolant holes.
  • the heat sink according to these measures requires no complex connection holes for the cooling channel - the connection between the cooling channel and the coolant holes crossing the cooling channel at a distance is achieved by separate closure pieces -, results in a comparatively simple manufacture of the cooling channel together with the connecting slot to the receiving recess for the closure pieces due to the continuous course of these openings in the direction of passage of the profile strand, which openings can thus be produced simultaneously with the calibration surfaces and the mold attachment, for example by wire erosion.
  • closure pieces extend into the area of the coolant holes provided for the supply and removal of the coolant makes the connection of the cooling channel in the shape of the calibration body with the coolant holes via the closure pieces simple, because the closure pieces only have corresponding connection openings for the flow connection between the Cooling channel and the associated coolant holes must have.
  • the open end faces of the through-opening of the calibration body formed by the cooling channel, the connecting slot and the receiving recess for the closure pieces are closed with the closure pieces, which creates advantageous installation conditions.
  • the closure pieces can have an engaging molded body with an outer, the cooling channel, the receiving recess and the slot between the cooling channel and the receiving recess closing the outside wall. If this end wall is provided with a peripheral web that widens conically outwards, then when the end wall is pressed into the associated opening of the calibration body, a liquid-tight seal is obtained without having to take additional sealing measures.
  • the shaped bodies of the closure pieces can carry inserts in the passage area of the coolant bores penetrating the receiving recess, which inserts control the flow through the coolant bores.
  • a comparison of the flow resistances can thus be achieved with the effect that the coolant flow is distributed in a desired ratio between the cooling channel and the further section of the coolant bore.
  • Such inserts for the closure pieces in the area of the passage of the coolant holes through the receiving recesses of the calibration body, but also an intermediate output of the connection openings of the closure pieces can also be controlled, so that, for example, the flow of the cooling channel in the shape of the calibration body with a receiving recess for Locking pieces passing through the coolant hole is connected or blocked off from this coolant hole in order to enable a connection to a further coolant hole.
  • a sufficient flow of coolant through the cooling channel must be provided for cooling the shape of the calibration body. Since the cooling channel is connected to the receiving recess for the closure pieces by a connecting slot, depending on the flow conditions within the connecting slot, a coolant flow parallel to the cooling channel can be formed, which under certain circumstances impairs the cooling of the molding approach. In order to prevent this parallel coolant flow through the connecting slot, the shaped bodies of the closure pieces can have webs projecting into the connecting slot to the cooling channel. In the case of larger distances between the front closure pieces, the receiving recess for the form a coolant flow parallel to the cooling channel. In order to prevent this, a filler can be inserted into the receiving recess of the calibration body between the closure pieces.
  • connection required between the coolant bores in the heat sink and the cooling channel in the mold attachment can be made via the closure pieces and, if appropriate, interchangeable inserts provided in the closure pieces, without the need for any additional design effort.
  • This also makes it possible to connect the connection opening of the closure piece assigned to the outlet end of the cooling channel with a separate coolant bore for coolant removal in order to be able to monitor the proper flow of coolant through the coolant flowing out of this coolant bore.
  • FIG. 1 shows a device according to the invention for calibrating an extruded plastic profile in an end view of the calibration body receiving the profile strand
  • Fig. 5 is a closure piece in a partially broken side view
  • FIG. 6 shows a section along the line VI-VI of FIG. 5.
  • the calibration device has a calibration body 1 which receives the profile strand 2 of a plastic profile emerging from a shaping profile nozzle.
  • the passage opening for the Profile strand 2 is delimited by calibration surfaces 3, to which the profile strand 2 is sucked in a conventional manner via vacuum slots, which are not shown for reasons of clarity.
  • the extruded plastic profile has in the region of a leg 4 an undercut longitudinal groove 5, in which a projection 6 protruding beyond the subsequent calibration surface 3 engages for calibration.
  • the molded body 1 is divided by dividing surfaces 7, which run in the direction of passage of the profile strand 2, in order to be able to easily assemble the profile cross section determined by the calibration surfaces 3 from individual molding strips 8.
  • the calibration body 1 In order to avoid adherence of the molten profile strand emerging from the profile nozzle to the calibration surfaces 3 and to keep the pull-off resistance of the profile strand 2 from the calibration body 1 under the conditions of a solidification of the melt that only begins, the calibration body 1 must in particular Inlet area are cooled to a subcritical temperature less than 50 to 70 ° C, for example.
  • the moldings 8 of the calibration body 1 are provided with coolant bores through which coolants, generally water, are pumped in a circuit. While the calibration surfaces 3 can be cooled comparatively easily by providing corresponding coolant bores, the cooling of the mold attachments 6 used for the calibration of longitudinal grooves 5 presents considerable difficulties due to the small cross section of these mold attachments 6.
  • the molding attachment 6 is provided with a cooling channel 9 which runs in the direction of passage of the profile strand 2 and which is connected by a slot 10 to a receiving recess 11 for closure pieces 12.
  • the cooling channel 9 thus forms, together with the connecting slot 10 and the receiving recess 11, a common through-opening in the direction of passage of the profile strand in the molding 8 of the calibration body 1 forming the molding attachment 6, as can be seen in FIGS. 2 to 4.
  • the molding 8 is provided with transverse to the mold approach 6 coolant holes 13 and 14 which penetrate the receiving recess 11 and open into a perpendicular to them 15 connecting hole, so that by the Coolant bore 13 is fed coolant through the bore 15 to the coolant bore 14 connected to a coolant outlet.
  • the end wall 17 is provided with a circumferential, outwardly conically widening edge web 18 which, when it engages in the passage opening of the molding 8, is sealingly pressed against the opening wall, as can be seen in FIGS. 2 and 4.
  • the shaped bodies 16, following the end wall 17, have a connection opening 19 running transversely to the cooling channel 9, which starts from a recess 20 on the circumferential side of the shaped body 16 opposite the cooling channel 9 and in the area of the slot 10 empties.
  • the shaped bodies 16 of the closure pieces 12 in the area of the coolant bores 13 and 14 are provided with through openings 21 which extend into the area of the connection openings 19, so that there is an intermediate outlet 22 for the connection bores 19, which can optionally be used in the through openings 21 can be closed.
  • the inserts 23 not only serve for the optional connection of the connection opening 19 with the associated coolant bore 13 or 14, but also allow throttling of the refrigerant flow through the coolant bores 13 or 14 in order to adjust the flow resistances accordingly and thus to divide the coolant flow as desired to force the coolant holes and the cooling channel 9.
  • the insert 23 is provided with a throttle bore 24 in the area of the coolant bore 13. Since this insert is also conical, a flow path to the intermediate outlet 22 of the connection opening 19 remains free between the insert 23 and the through opening 21, through which the connection opening 19 communicates with the coolant bore 13.
  • the shaped bodies 16 of the closure pieces 12 are provided with webs 25 which project into the connecting slot 10 and are arranged after the mouth of the connection opening 19.
  • An insert 23 in the form of a cylindrical sleeve is inserted into the through-opening 21 of the closure piece 12 assigned to the coolant bore 14 and closes the intermediate outlet 22 of the connection opening 19 with respect to the coolant bore 14, so that the coolant from the cooling channel 9 through the connection opening 19 flows into the recess 20, in the area of which a separate coolant bore 26 ends, so that the coolant flows out of the cooling channel 9 via this coolant bore 26.
  • This separate outflow of the coolant flow from the cooling channel 9 can advantageously be used to monitor the permeability of the cooling channel 9.
  • connection openings 19 for connecting the cooling channel 9 with the cooling channel 9 crossing the coolant holes 13, 14, 26, otherwise necessary, complex connection holes for the cooling channel 9 through the stepped neck of the neck 6 can be avoided.
  • flow connections adapted to different conditions can be achieved between the coolant bores and the cooling channel, with the aid of structurally predetermined, uniform closure pieces 12, which can also be used on both end faces of the receiving recesses 11 on account of their symmetrical design with respect to a longitudinal plane ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

La présente invention concerne un dispositif pour calibrer un profilé extrudé en plastique présentant au moins une rainure longitudinale (5), comprenant un corps de calibrage (1) qui prend en charge le boyau profilé (2) qui sort de la filière d'extrusion, ledit corps de calibrage présentant un élément de profilage en saillie (6) qui s'étend dans la direction de passage du boyau profilé (2), dépasse dans la rainure longitudinale (5) du boyau profilé (2), et comprend un canal de refroidissement (9), ainsi que des orifices de passage d'agent de refroidissement (13, 14, 26) qui s'étendent transversalement à l'élément de profilage en saillie (6) et croisent son canal de refroidissement (9). Afin d'obtenir de bonnes conditions de réalisation, le canal de refroidissement (9) ouvert des deux côtés est relié par une fente traversante (10) à une ouverture de réception (11) qui traverse le corps de calibrage (1) dans la direction de passage, s'étend au niveau des orifices de passage d'agent de refroidissement (13, 14, 26) et est destinée à des éléments d'obturation (12) qui peuvent être introduits depuis les côtés ouverts. Ces éléments d'obturation forment des ouvertures de raccord (19) qui servent à établir la liaison fluidique entre le canal de refroidissement (9) et les orifices de passage d'agent de refroidissement (13, 26) correspondants.
EP04736369A 2003-06-10 2004-06-09 Dispositif pour calibrer un profile extrude en plastique presentant au moins une rainure longitudinale Withdrawn EP1654106A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0089703A AT413676B (de) 2003-06-10 2003-06-10 Vorrichtung zum kalibrieren eines extrudierten, wenigstens eine längsnut bildenden kunststoffprofils
PCT/AT2004/000199 WO2004108394A1 (fr) 2003-06-10 2004-06-09 Dispositif pour calibrer un profile extrude en plastique presentant au moins une rainure longitudinale

Publications (1)

Publication Number Publication Date
EP1654106A1 true EP1654106A1 (fr) 2006-05-10

Family

ID=33494515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04736369A Withdrawn EP1654106A1 (fr) 2003-06-10 2004-06-09 Dispositif pour calibrer un profile extrude en plastique presentant au moins une rainure longitudinale

Country Status (6)

Country Link
US (1) US7258540B2 (fr)
EP (1) EP1654106A1 (fr)
CN (1) CN100445076C (fr)
AT (1) AT413676B (fr)
RU (1) RU2314921C2 (fr)
WO (1) WO2004108394A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1154218A (fr) * 1982-02-11 1983-09-27 Vittorio Dezen Dispositif de dimensionnement par depression
AT410650B (de) * 1998-04-27 2003-06-25 Greiner Extrusionstechnik Gmbh Kalibriervorrichtung mit zumindest einem kalibrierwerkzeug
AT412769B (de) * 2000-01-14 2005-07-25 Greiner Extrusionstechnik Gmbh Formgebungseinrichtung für eine extrusionsanlage
AT412770B (de) 2001-06-26 2005-07-25 Greiner Extrusionstechnik Gmbh Formgebungseinrichtung für eine extrusionsanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004108394A1 *

Also Published As

Publication number Publication date
AT413676B (de) 2006-04-15
RU2005141566A (ru) 2006-05-10
WO2004108394A1 (fr) 2004-12-16
US20060280827A1 (en) 2006-12-14
CN1802247A (zh) 2006-07-12
ATA8972003A (de) 2005-09-15
US7258540B2 (en) 2007-08-21
RU2314921C2 (ru) 2008-01-20
CN100445076C (zh) 2008-12-24

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