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DE2403295A1 - Pre-heating particulate plastics in hopper - with air warmed by extruder waste heat - Google Patents

Pre-heating particulate plastics in hopper - with air warmed by extruder waste heat

Info

Publication number
DE2403295A1
DE2403295A1 DE2403295A DE2403295A DE2403295A1 DE 2403295 A1 DE2403295 A1 DE 2403295A1 DE 2403295 A DE2403295 A DE 2403295A DE 2403295 A DE2403295 A DE 2403295A DE 2403295 A1 DE2403295 A1 DE 2403295A1
Authority
DE
Germany
Prior art keywords
extruder
heat
line
hopper
storage container
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.)
Granted
Application number
DE2403295A
Other languages
German (de)
Other versions
DE2403295C2 (en
Inventor
Erich Riedel
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.)
NORDENIA KUNSTSTOFFE
Original Assignee
NORDENIA KUNSTSTOFFE
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
Priority claimed from AT601973A external-priority patent/AT344399B/en
Application filed by NORDENIA KUNSTSTOFFE filed Critical NORDENIA KUNSTSTOFFE
Publication of DE2403295A1 publication Critical patent/DE2403295A1/en
Application granted granted Critical
Publication of DE2403295C2 publication Critical patent/DE2403295C2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/021—Heat treatment of powders
    • 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
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/793—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling upstream of the plasticising zone, e.g. heating in the hopper
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A device for pre-heating pulverulent or granular plastics is fitted with a hopper connected to an extruder and provided with a line for feeding a heating medium. The line is connected with a suction hood which covers that part of the extruder subject to heat loss during operation. The heat-losing part of the extruder has coiled piping connected to the coils of a heat-exchanger through which an air stream generated by a ventilator passes. This air stream is thereby heated and enters the hopper via the line. Waste heat from the extruder is used to pre-heat the plastics. The air which sheds its heat in the hoppers and issues therefrom at a reduced temp. may be used to cool the workshop, thereby helping to improve working conditions.

Description

"Vorrichtung zum Vorwärmen pulverförmiger oder körniger thermoplastischer Kunststof#e mit einem an einen Extruder anschlieBbaren Vorratsbehälter" "Zusatz zu der Patentanmeldung P 22 35 023.8-16) Gegenstand des Patents ... (der Patentanmeldung P 22 35 023.8-16) ist eine Vorrichtung zum Vorwärmen pulverförmiger oder körniger thermoplastischer Kunststoffe mit einem an einen Extruder anschließbaren Vorratsbehälter, der mit einer Leitung zum Zuführen eines Heizmediums versehen ist und bei dem die Leitung mit einer Absaughaube verbunden ist, die den beim Betrieb Ver-' lustwärme abgebenden Teil des Extruders und seiner Profilwerkzeuge überdeckt. "Device for preheating powdered or granular thermoplastic Plastics with a storage container "" additive that can be connected to an extruder to the patent application P 22 35 023.8-16) Subject matter of the patent ... (the patent application P 22 35 023.8-16) is a device for preheating powdery or granular thermoplastics with a storage container that can be connected to an extruder, which is provided with a line for supplying a heating medium and in which the Line is connected to a suction hood, which reduces the heat loss during operation covering the donating part of the extruder and its profile tools.

Der Gegenstand der Hauptanmeldung erfaßt ferner eine Vorrichtung zum Vorwärmen pulverförmiger oder körniger thermoplastischer Kunststoffe, bei der der beim Betrieb Verlustwärme abgebende Teil des Extruders ein von einem Temperiermedium durchflossenes Rohrschlangensystem aufweist. Im Vorratsbehälter ist ebenfalls in bekannter Weise ein Rohrschlangensystem vorhanden, das mit dem dem Extruder zugeordneten Rohrschlangensystem verbunden ist.The subject matter of the main application also includes a device for Preheating of powdered or granular thermoplastics, in which the During operation, the part of the extruder that emits heat loss is supplied by a temperature control medium Has flowed-through coiled pipe system. In the storage container is also in As is known, a coil system is present, which is associated with the extruder Coiled pipe system is connected.

Durch diese Vorrichtung nach dem Hauptpatent wird verhindert, daß die Verlustwärme von dem Extruder und seinen Profilwerkzeugen in den Betriebsraum eindringt und diesen aufheizt.This device according to the main patent prevents the heat loss from the extruder and its profile tools in penetrates the operating room and heats it up.

Die Verlustwärme wird dazu benutzt, das im Vorratsbehälter befindliche Kunststoffmaterial vorzuwärmen.The heat loss is used to remove that in the storage container Preheat plastic material.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Vorwärmen pulverförmiger oder körniger thermoplastischer Kunststoffe mit einem an einen Extruder anschließbaren Vorratsbehälter, der mit einer Leitung zum Zuführen eines Heizmediums versehen ist, wobei der beim Betrieb Verlustwärme abgebende Teil des Extruders ein von einem Temperiermedium durchflossenes Rohrschlangensystem aufweist, so zu gestalten, daß die Vorwärmung des im Vorratsbehälter befindlichen Kunststoffmaterials über einen Luftstrom erfolgt, der nach dem Durchströmen des Vorratsbehälters als Kaltluft zur Verbesserung der thermischen Bedingungen in den Betriebsraum geleitet werden kann.The invention is based on the object of a device for preheating powder or granular thermoplastics with one to an extruder connectable storage container with a line for supplying a heating medium is provided, with the part of the extruder which gives off heat loss during operation has a coil system through which a temperature control medium flows, to be designed in such a way that that the preheating of the plastic material in the storage container over an air flow takes place, which after flowing through the storage container as cold air to improve the thermal conditions in the operating room can.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß das Rohrschlangensystem des Extruders mit Rohrschlangen eines Wärmeaustauschers verbunden ist, welcher Wärmeaustauscher von einem über einen Ventilator erzeugten Luftstrom durchströmt ist, und daß der erwärmte Luftstrom in den Vorratsbehälter über die Leitung eintritt.This object is achieved according to the invention in that the pipe coil system of the extruder is connected to tube coils of a heat exchanger, which heat exchanger is traversed by an air flow generated by a fan, and that the heated air stream enters the reservoir via the line.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden beschrieben.An embodiment of the invention is shown in the drawing and is described below.

Der schematisch dargestellte Extruder 1 weist ein Schneckensystem 2 auf, das zum Replastifizieren des Kunststoffmaterials; 3 dient und dem Heizelemente 4 zugeordnet sind. Nach der Replastifizierung des aus einem Vorratsbehälter 5 den Schnecken 2 zugeführten Kunststoffmaterirls wird dieses mittels der Schnecken durch einen Formkopf 6 gepresst, aus dem das thermoplastische Produkt 7, z.B. eine Kunststoffolie, austritt. Die Schnecke 2 wird von einem Rohrschlangensystem 8 umgeben, das einen Zulaufstutzen 9 besitzt und von einem Temperiermedium, z.B. Wasser, durchflossen wird. Das Temperiermedium wird durch die Verlustwärme des Extruders aufgeheizt und über eine Leitung 10 den Rohrschlangen 11 eines Wärmeaustauschers 12 zugeführt. Nach dem Durchströmen der Rohrschlangen 11 fließt das Temperiermedium an der Ausflußstelle 13 ab.The extruder 1 shown schematically has a screw system 2, that for re-plasticizing the plastic material; 3 is used and the heating elements 4 are assigned. After the replasticization of the from a storage container 5 the Plastic material supplied to screws 2 is carried out by means of the screws a molding head 6 is pressed from which the thermoplastic product 7, e.g. a plastic film, exit. The snail 2 is surrounded by a pipe coil system 8, which has an inlet connection 9 and a temperature control medium, e.g. water, flowing through it will. The temperature control medium is heated up by the heat loss from the extruder and The pipe coils 11 of a heat exchanger 12 are fed via a line 10. After flowing through the coils 11, the temperature control medium flows at the outflow point 13 from.

Der Wärmeaustauscher 12 ist so gebaut, daß ein Ventilator 14 die Luft 15 über Rohrführungen 16,17 und ein Drosselsystem 18 ansaugt. Die Luft 15 erwärmt sich im Wärmeaustauscher und wird über eine Leitung 19 dem Vorratsbehälter 5 zugeführt. Beim Durchströmen des Vorratsbehälters gibt die Luft ihre Wärme an das Kunststoffmaterial 3 ab. Die abgekühlte Luft entweicht anschliessend über einen Rohrstutzen 20. £Damit ein stabiler Regelkreis gegeben ist, kann über ein Rohr 21 Kaltluft angesaugt werden, deren Anteil mit der erwärmten Luft 15 durch entsprechende Einstellung der Drossel 18 bestimmt wird. Die so gemischte Luft gewährleistet den stabilen Regelkreis.The heat exchanger 12 is built so that a fan 14 the air 15 sucks in via pipe guides 16, 17 and a throttle system 18. The air 15 is heated is located in the heat exchanger and is fed to the storage container 5 via a line 19. When flowing through the storage container, the air gives its heat to the plastic material 3 from. The cooled air then escapes through a pipe socket 20. £ With it a stable control loop is given, cold air can be sucked in via a pipe 21, their share with the heated air 15 by setting the throttle accordingly 18 is determined. The air mixed in this way ensures the stable control loop.

Zur Verfeinerung der Regelung kann es von Vorteil sein, auch das zuruckgeführte Luftvolumen zu steuern. Aus diesem Grunde ist es zweckmäßig, den Antrieb des Ventilators 14 als drehzahlgeregelt zu betreiben, z.B. über einen Gleichstrommotor oder einen polumschaltbaren Drehstrommotor.To refine the control, it can be advantageous to also include the returned Control air volume. For this reason it is advisable to drive the fan 14 can be operated as speed-controlled, e.g. via a DC motor or a pole-changing three-phase motor.

Claims (3)

Pat entansprüche Patent claims Vorrichtung zum Vorwärmen pulverförmiger oder körniger thermoplastischer Kunststoffe mit einem an einen Extruder anschließbaren Vorratsbehälter, der mit einer Leitung zum Zuführen eines Reizmediums versehen ist, wobei dtr beim Betrieb Verlustwärme abgebende gebil des Extruders ein von einem Temperiermedium durchflossenes Rohrschlangensystem aufweist, nach Patent ... (Patentanmeldung P 22 35 023.8-16), d a d u r c h g e k e n n z e i c h n e t , daß das Rohrschlangensystem (8) mit Rohrschlangen (11) eines Wärmeaustauschers (12) verbunden ist, welcher Wärmeaustauscher von einem über einen Ventilator (14) erzeugten Luftstrom durchströmt ist, und daß der erwärmte Luftstrom in den Vorratsbehälter (5) über die Leitung (19) eintritt.Device for preheating powdered or granular thermoplastic Plastics with a storage container which can be connected to an extruder and which is connected to a line for supplying a stimulating medium is provided, with dtr during operation Heat-dissipating structure of the extruder through which a temperature control medium flows Has a coil system, according to patent ... (patent application P 22 35 023.8-16), d a d u r c h e k e n n n z e i c h n e t that the pipe coil system (8) with Coiled tubes (11) of a heat exchanger (12) is connected, which heat exchanger is traversed by an air flow generated by a fan (14), and that the heated air flow enters the storage container (5) via the line (19). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zwischen dem Wärmeaustauscher (12) und dem Ventilator (14) eine Kaltluftzuführung (18,21) vorgesehen ist.2. Apparatus according to claim 1, characterized in that between the heat exchanger (12) and the fan (14) a cold air supply (18,21) is provided. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dem Ventilator (14) ein drehzahlgeregelter Antrieb zugeordnet ist.3. Apparatus according to claim 1 or 2, characterized in that a speed-controlled drive is assigned to the fan (14).
DE2403295A 1973-07-09 1974-01-24 Device for preheating powdery or granular thermoplastics Expired DE2403295C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT601973A AT344399B (en) 1972-07-17 1973-07-09 DEVICE FOR HEATING THE RAW MATERIAL IN THE RESERVOIR OF AN EXTRUDER

Publications (2)

Publication Number Publication Date
DE2403295A1 true DE2403295A1 (en) 1975-01-23
DE2403295C2 DE2403295C2 (en) 1983-01-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE2403295A Expired DE2403295C2 (en) 1973-07-09 1974-01-24 Device for preheating powdery or granular thermoplastics

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Country Link
DE (1) DE2403295C2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337205A1 (en) * 1993-10-30 1995-05-04 R & T Umwelt Gmbh Heat recovery apparatus and process for extruding and granulating apparatuses in comminuting and cleaning stages of plastics recycling installations for pretreated plastics fractions
WO2001070473A1 (en) * 2000-03-21 2001-09-27 Basell Polyolefine Gmbh Method for granulating thermoplastic polymers
DE102008023046A1 (en) 2008-05-09 2009-11-12 Coperion Gmbh Plastic granulating plant has granulating device that is water-cooled with granulated-water, where bulk-cargo heat exchanger is provided with heat exchanger medium for heating plastic-bulk cargo
DE102013202997A1 (en) * 2013-02-24 2014-08-28 Battenfeld-Cincinnati Germany Gmbh Method for using the amount of heat released in an extrusion process
DE102013202996A1 (en) * 2013-02-24 2014-08-28 Battenfeld-Cincinnati Germany Gmbh Method for using the amount of heat released in an extrusion process
US9776354B2 (en) 2013-02-24 2017-10-03 American Maplan Corporation Extrusion process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1454806B2 (en) * 1962-10-31 1972-09-21 DEVICE FOR DRYING, PRE-HEATING AND DISPENSING OF POWDER OR GRANULATE THERMOPLASTIC MATERIAL FOR A PRESSING OR MOLDING MACHINE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1454806B2 (en) * 1962-10-31 1972-09-21 DEVICE FOR DRYING, PRE-HEATING AND DISPENSING OF POWDER OR GRANULATE THERMOPLASTIC MATERIAL FOR A PRESSING OR MOLDING MACHINE

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337205A1 (en) * 1993-10-30 1995-05-04 R & T Umwelt Gmbh Heat recovery apparatus and process for extruding and granulating apparatuses in comminuting and cleaning stages of plastics recycling installations for pretreated plastics fractions
WO2001070473A1 (en) * 2000-03-21 2001-09-27 Basell Polyolefine Gmbh Method for granulating thermoplastic polymers
DE102008023046A1 (en) 2008-05-09 2009-11-12 Coperion Gmbh Plastic granulating plant has granulating device that is water-cooled with granulated-water, where bulk-cargo heat exchanger is provided with heat exchanger medium for heating plastic-bulk cargo
DE102013202997A1 (en) * 2013-02-24 2014-08-28 Battenfeld-Cincinnati Germany Gmbh Method for using the amount of heat released in an extrusion process
DE102013202996A1 (en) * 2013-02-24 2014-08-28 Battenfeld-Cincinnati Germany Gmbh Method for using the amount of heat released in an extrusion process
EP2769823A3 (en) * 2013-02-24 2015-01-07 battenfeld-cincinnati Germany GmbH Method for using the heat emitted in an extrusion process
EP2769824A3 (en) * 2013-02-24 2015-02-25 battenfeld-cincinnati Germany GmbH Method for using the heat emitted in an extrusion process
US9776354B2 (en) 2013-02-24 2017-10-03 American Maplan Corporation Extrusion process

Also Published As

Publication number Publication date
DE2403295C2 (en) 1983-01-20

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