DE1152815B - Device for calibrating hollow profiles made of thermoplastics - Google Patents

Device for calibrating hollow profiles made of thermoplastics

Info

Publication number
DE1152815B
DE1152815B DED34929A DED0034929A DE1152815B DE 1152815 B DE1152815 B DE 1152815B DE D34929 A DED34929 A DE D34929A DE D0034929 A DED0034929 A DE D0034929A DE 1152815 B DE1152815 B DE 1152815B
Authority
DE
Germany
Prior art keywords
nozzle
hollow profiles
thermoplastics
profiles made
caliber
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.)
Pending
Application number
DED34929A
Other languages
German (de)
Inventor
Rudolf Barainsky
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.)
Dyna-Plastik-Werk GmbH
Original Assignee
Dyna-Plastik-Werk 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 Dyna-Plastik-Werk GmbH filed Critical Dyna-Plastik-Werk GmbH
Priority to DED34929A priority Critical patent/DE1152815B/en
Publication of DE1152815B publication Critical patent/DE1152815B/en
Pending 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
    • 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
    • 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
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material

Landscapes

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

Description

Vorricktung zum Kalibrieren von Hohlprofilen aus thermoplastischen Kunststoffen Bei der Herstellung von Profilen aus thermoplastischen Kunststoffen mit dem Extruder ist es notwendig, das noch warme und somit plastische Material nach dem Verlassen der Düse bis zu seiner Erkaltung und Erstarrung in der gewünschten Form zu fixieren. Das geschieht durch sogenannte Kalibriereinrichtungen. Bei Hohlprofilen unterscheidet man zwei verschiedene Verfahren, und zwar das Stützluftverfahren und das Vakuumverfahren. Preamble for calibrating hollow profiles made of thermoplastic Plastics In the manufacture of profiles from thermoplastics with the extruder it is necessary to remove the still warm and therefore plastic material after leaving the nozzle until it cools and solidifies in the desired Fix shape. This is done by so-called calibration devices. With hollow profiles A distinction is made between two different methods, namely the supporting air method and the vacuum process.

Im ersteren Falle wird die Anlage des Kunststoffmaterials an das umfassende und formende Kaliber dadurch bewirkt, daß an der Düse durch eine Kette, Draht, Bolzen oder ähnliche Einrichtungen ein Pfropfen befestigt ist, der durch diese Einrichtung in einem bestimmten Abstand von der Düse fixiert ist, und zwar derart, daß in den so gebildeten Zwischenraum zwischen Düse und Pfropfen Luft bestimmten Druckes eingeblasen werden kann. Die Spannung dieser Luft bewirkt dann, daß der noch weiche Kunststoff gegen die Wandungen des Kalibers gedrückt wird. Für geschlossene Profile wie Rohre und dergleichen hat sich dieses Verfahren recht gut bewährt. Es weist jedoch den Nachteil auf, daß der Pfropfen genau dem Innenmaß des Profils entsprechen muß. Wenn sich aus irgendwelchen, z. B. temperatur- oder förderbedingten Schwangungen die Materialdicke einmal ändert, kommt es vor, daß sich das Material zwischen Kaliber und Pfropfen verklemmt. Völlig unbrauchbar ist jedoch dieses Verfahren bei Profilen, die nicht geschlossen sind. Bei solchen nicht geschlossenen Profilen war es bisher unmöglich, die Stützluft zu halten; sie entweicht durch die offenen Profilstellen und gestattet kein genaues Kalibrieren mehr. In the former case, the plastic material is in contact with the comprehensive and shaping caliber caused by the fact that at the nozzle by a chain, Wire, bolt or similar device is attached to a plug that passes through this device is fixed at a certain distance from the nozzle, namely in such a way that air was determined in the space thus formed between the nozzle and the plug Pressure can be injected. The tension in this air then causes the soft plastic is pressed against the walls of the caliber. For closed Profiles such as pipes and the like, this method has proven itself quite well. It however, it has the disadvantage that the plug corresponds exactly to the internal dimensions of the profile got to. If any, z. B. temperature or funding-related swings Once the material thickness changes, it can happen that the material changes between caliber and plug jammed. However, this method is completely useless for profiles that are not closed. It was previously the case with such non-closed profiles impossible to hold the supporting air; it escapes through the open profile areas and no longer allows precise calibration.

Für solche offenen Profile ist das Vakuumverfahren geeigneter, bei dem die Anlage des Materials an das Kaliber dadurch erzeugt wird, daß das Kaliber Bohrungen oder Schlitze besonderer Anordnung erhält, die, an eine Vakuumpumpe angeschlossen, dieses Vakuum derart ausnutzen, daß der heiße Kunststoff gewissermaßen an die Wandungen des Kalibers angesaugt wird. Beim Vakuumverfahren läßt sich das Hohlprofil leichter in das Kaliber einziehen als beim Stützluftverfahren, weil es nicht notwendig ist, das warme, weiche Profil über den Stopfen hinwegzuziehen. Die Nachteile dieses Verfahrens sind, daß diese Kaliber leicht zur Verstopfung neigen, daß der Anlagedruck nur an den Stellen vorhanden ist, an denen sich gerade eine Absaugbohrung bzw. ein Ansaugschlitz befindet, und daß dieser Druck theoretisch niemals 1 atü übersteigen kann; praktisch ist 0,9 atü das Optimum. The vacuum process is more suitable for such open profiles which the application of the material to the caliber is generated in that the caliber Bores or slots are given a special arrangement which, when connected to a vacuum pump, Use this vacuum in such a way that the hot plastic to a certain extent hits the walls of the caliber is sucked in. The hollow profile is easier to use in the vacuum process move into the caliber than with the support air method, because it is not necessary pulling the warm, soft profile over the plug. The disadvantages of this procedure are that these calibres tend to clog easily, that the system pressure is only at the places where there is a suction hole or a suction slot is located, and that this pressure can theoretically never exceed 1 atm; practically 0.9 atü is the optimum.

Zweck der Erfindung ist es, die Vorzüge des Stützluftverfahrens mit denen des Vakuumverfahrens zu vereinigen, d. h. die Möglichkeit der Ausübung eines beliebig starken, nur durch die Bauteile begrenzten Druckes von innen her auf das extrudierte Hohlprofil zu verbinden mit dem Vorteil, auch offene Profile so herstellen und Wandstärkenschwankungen in weiten Grenzen ausgleichen zu können. The purpose of the invention is to take advantage of the support air method to unite those of the vacuum process, d. H. the possibility of exercising a Any amount of pressure on the inside, limited only by the components to connect extruded hollow profile with the advantage of also producing open profiles and to be able to compensate for wall thickness fluctuations within wide limits.

Die Vorrichtung besteht erfindungsgemäß aus einem gummielastischen, einseitig verschlossenenBlähkörper, dessen andere, offene Seite fest am Düsendorn derart angeordnet ist, daß durch denselben Luft in den Blähkörper gelangen und dieser damit aufgeblasen werden kann. Das extrudierte Profil kann in weichem Zustand über den nicht aufgeblasenen Blähkörper hinweggezogen werden und in die Abzugsmaschine eingeführt werden. Alsdann wird der Blähkörper mit dem gewünschten Druck aufgeblasen; dieser legt sich von innen gegen das Hohlprofil, gleichgültig, ob es sich um ein geschlossenes oder ein offenes Hohlprofil handelt und drückt es gegen das Kaliber. An diese Kalibriervorrichtung ist unmittelbar anschließend ein Wasserbad angeschlossen, welches das Hohlprofil durchläuft, so daß das Hohlprofil sofort nach der Kalibrierung abgekühlt wird. Für Hohlprofile mit mehreren Kanälen können so mehrere Blähkörper an den Düsendornen sitzen. According to the invention, the device consists of a rubber-elastic, inflatable body closed on one side, the other, open side firmly attached to the nozzle mandrel is arranged so that through the same air get into the inflatable body and this so that it can be inflated. The extruded profile can be over in the soft state the uninflated inflatable body is pulled away and into the pull-off machine to be introduced. The inflatable body is then inflated with the desired pressure; this lies against the inside of the hollow profile, regardless of whether it is a closed or an open hollow profile and presses it against the caliber. A water bath is immediately connected to this calibration device, which passes through the hollow profile, so that the hollow profile immediately after calibration is cooled. For hollow profiles with several channels, several inflatable bodies can be used sit on the nozzle thorns.

Die Zeichnung zeigt die Vorrichtung gemäß der Erfindung: Durch den Zwischenraum zwischen dem Düsenkörper 1 und dem Düsendorn 2 tritt das Hohlprofil aus thermoplastischem Kunststoff aus, wobei die Weiterbeförderung mittels Abzugsrollen 9 geschieht. Der Blähkörper 7 stützt das Hohlprofil von innen ab und drückt es gegen das Kaliber 4. Das Kaliber 4 wird vorzugsweise gekühlt. Durch den Kanal 5 wird der nicht aufgeblasene Teil 6 des Blähkörpers 7 mit Luft gefüllt. Durch ein Wasserbad 8 läuft das Profil 3 schließlich auf die anschließenden Abzugsrollen 9. The drawing shows the device according to the invention: By the The hollow profile occurs between the nozzle body 1 and the nozzle mandrel 2 Made of thermoplastic material, the onward transport by means of take-off rollers 9 happens. The inflatable body 7 supports the hollow profile from the inside and presses it against it the caliber 4. The 4 caliber is preferably cooled. Through the Channel 5, the non-inflated part 6 of the inflatable body 7 is filled with air. By a water bath 8, the profile 3 finally runs on the subsequent take-off rollers 9.

Claims (1)

PATENTANSPRUCH: Vorrichtung zum Kalibrieren von aus einer Strangpresse ausgepreßten Hohlprofilen aus ther- moplastischem Werkstoff, bei der anschließend an die Düse der Strangpresse ein kühlbares Kalibrierrohr angeordnet ist, dadurch gekennzeichnet, daß im Kalibrierrohr ein schlauchförmiger, mit seinem offenen Ende am Dorn der Preßdüse befestigter, durch den Dorn aufblasbarer Blähkörper vorgesehen ist. PATENT CLAIM: Device for calibrating from an extrusion press extruded hollow profiles made of thermally thermoplastic material, in which subsequently a coolable calibration tube is arranged on the nozzle of the extrusion press, thereby characterized in that a tubular, with its open end in the calibration tube provided on the mandrel of the compression nozzle, inflatable body inflatable by the mandrel is. In Betracht gezogene Druckschnften: Deutsche Auslegeschrift Nr. 1016009. Printed publications under consideration: German Auslegeschrift No. 1016009.
DED34929A 1960-12-12 1960-12-12 Device for calibrating hollow profiles made of thermoplastics Pending DE1152815B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED34929A DE1152815B (en) 1960-12-12 1960-12-12 Device for calibrating hollow profiles made of thermoplastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED34929A DE1152815B (en) 1960-12-12 1960-12-12 Device for calibrating hollow profiles made of thermoplastics

Publications (1)

Publication Number Publication Date
DE1152815B true DE1152815B (en) 1963-08-14

Family

ID=7042419

Family Applications (1)

Application Number Title Priority Date Filing Date
DED34929A Pending DE1152815B (en) 1960-12-12 1960-12-12 Device for calibrating hollow profiles made of thermoplastics

Country Status (1)

Country Link
DE (1) DE1152815B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016009B (en) * 1954-07-15 1957-09-19 Anton Reifenhaeuser Fa Process for the extrusion of hollow bodies made of thermoplastic material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016009B (en) * 1954-07-15 1957-09-19 Anton Reifenhaeuser Fa Process for the extrusion of hollow bodies made of thermoplastic material

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