DE2139385A1 - PLASTICIZING UNIT FOR THERMOPLASTIC MOLDING COMPOUNDS - Google Patents

PLASTICIZING UNIT FOR THERMOPLASTIC MOLDING COMPOUNDS

Info

Publication number
DE2139385A1
DE2139385A1 DE2139385A DE2139385A DE2139385A1 DE 2139385 A1 DE2139385 A1 DE 2139385A1 DE 2139385 A DE2139385 A DE 2139385A DE 2139385 A DE2139385 A DE 2139385A DE 2139385 A1 DE2139385 A1 DE 2139385A1
Authority
DE
Germany
Prior art keywords
screw
plasticizing unit
plasticizing
opening
openings
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
DE2139385A
Other languages
German (de)
Inventor
Kurt Dr Brueckmann
Hans Otto Dipl Ing Schiedrum
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Priority to DE2139385A priority Critical patent/DE2139385A1/en
Priority to FR7228239A priority patent/FR2148486A1/en
Publication of DE2139385A1 publication Critical patent/DE2139385A1/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • 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
    • B29C48/29—Feeding the extrusion material to the extruder in liquid form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
    • B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a barrel
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/62—Barrels or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—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
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

FARBWERKE HOECHST AKTIENGESELLSCHAFT 71393 B 3FARBWERKE HOECHST AKTIENGESELLSCHAFT 71393 B 3

vormals Meister Lucius & Brüning - - · 'formerly Master Lucius & Brüning - - · '

Patentanmeldung: - HOE 71/F 198 u. HPatent application: - HOE 71 / F 198 u. H

Datum: 5. August 1971 - DPh.HS/schDate: Aug. 5, 1971 - DPh.HS / sch

Plastifiziereinheit für thermoplastische Formmassen Plasticizing unit for thermoplastic molding compounds

Die Erfindung betrifft ein Plastifizieraggregat für thermoplastische Formmassen, das universell nieder- und hochviskose Massen verarbeiten und auch mit Zylinderöffnung zum Entgasen oder Zudosieren betrieben werden kann und das, je nach Erfordernis,viel oder wenig Plastifizierenergie in das Material einbringt.The invention relates to a plasticizing unit for thermoplastics Molding compounds that process universally low and high viscosity compounds and also with cylinder openings for degassing or metering can be operated and that, depending on the requirement, a lot or introduces little plasticizing energy into the material.

Es ist bekannt, daß normal- und höherviskose Massen von hohem Plastifizierenergieinhalt (z.B. normales oder höhermolekulares Polyäthylen) für die optimale Plastifizierung längere Zylinder bei flacheren Gangtiefen erfordern, während höherviskose Massen von geringem Plastifizierenergieinhalt (z.B. Hart-PVC) auf kürzeren, tiefgeschnittenen Schnecken-Zylinderkombinationen optimal verarbeitet werden.It is known that normal and higher viscosity masses with a high plasticizing energy content (e.g. normal or higher molecular weight Polyethylene) for optimal plasticization of longer cylinders require for shallower passageway depths, while higher-viscosity materials with a low plasticizing energy content (e.g. rigid PVC) shorter, deep-cut screw-cylinder combinations can be optimally processed.

Durch Variation von Gangtiefe und Umfangsgeschwindigkeit der Schnecke läßt sich bei gegebener Länge auf der Einschnecke eine gewisse Anpassung an die optimale Verarbeitung dieser Materialien ex'reichen. Dies ist bei der ineinandergreifenden Doppelschnecke nicht möglich, da Gangtiefe, Schneckendurchmesser und Schneckenachsabstand geometrisch einander zugeordnet sind, so daß eine unabhängige Variation dieser Einzelgrößen unmöglich ist.By varying the thread depth and circumferential speed of the screw, a certain adaptation to the optimal processing of these materials is sufficient. This is with the intermeshing twin screw not possible because the flight depth, screw diameter and screw axis distance are geometrically assigned to one another, see above that an independent variation of these individual quantities is impossible.

Bei der Doppelschnecke lassen sich entsprechende Anpassungen daher nur über die Drehzahl, die Schneckengeometrie außer der Gangtiefe, und die Schneckenlänge durchführen.With the twin screw, corresponding adjustments can therefore only be made via the speed, the screw geometry apart from the Carry out the flight depth and the screw length.

So ist es bekannt, Maschinen die an sich für die Verarbeitung von PVC konstruiert und verwendet werden, für die Verarbeitung vonSo it is known, machines that are designed and used for the processing of PVC, for the processing of

309807/110 8309807/110 8

Polyäthylen mit Zylinderverlängerung und verlängerten Schnecken auszurüsten.To equip polyethylene with barrel extensions and elongated screws.

Müssen entsprechende Plastifiziereinheiten als Zusatzaggregate in z.B. Spritzgieß- oder Blasmaschinen installiert werden, ist eine Verlängerung oder Verkürzung der Zylinder wegen des festen Einbaues des Aggregates unmöglich. Die manchmal vorgesehenen Verschiebewege können aus wirtschaftlichen Gründen nur kurz bemessen sein, so daß auch hier entsprechende Extruderverlängerungen meist nicht möglich sind*If appropriate plasticizing units have to be installed as additional units in e.g. injection molding or blow molding machines, is an extension or shortening of the cylinder is impossible due to the fixed installation of the unit. The sometimes provided For economic reasons, displacement distances can only be short, so that here too, corresponding extruder extensions are mostly not possible *

Der Erfindung liegt die Aufgabe zugrunde, eine Plastifizierein-P heit von gegebenen Längenabmessungen wahlweise mit kurzen oder langen Arbeitslängen der Schnecken zu fahren, um das Aggregat für die unterschiedlichen Materialien entsprechend optimal betreiben zu können.The invention is based on the object of a plasticizing unit of the given length dimensions to drive with either short or long working lengths of the screws to the unit operate optimally for the different materials to be able to.

Dies wird dadurch erreicht, daß ein langer Extruderzylinder mit z.B. drei wahlweise verschließbaren Öffnungen vorgesehen wird, in dem alternativ Schnecken von größerer oder kürzerer Arbeitslänge vorgesehen werden können, wobei die Zylinderöffnung der Arbeitslänge der Schnecken entsprechend als Einfüllöffnung oder Entgasungsöffnung eingesetzt werden können.This is achieved by providing a long extruder cylinder with, for example, three openings that can be closed as desired, in which alternatively screws of greater or shorter working length can be provided, the cylinder opening of the Working length of the screws can be used accordingly as a filling opening or degassing opening.

t Es handelt sich also um eine Plastifiziereinheit zum Plastifizieren und Fördern von thermoplastischem Material, dadurch gekennzeichnet, daß ein, Extruderzylinder zur Variation der Arbeitslänge der Schnecke mit mindestens zwei hintereinanderliegenden verschließbaren Öffnungen zum Einsetzen des Einfülltrichters versehen ist. Diese Ausführung des Zylinders eignet sich sowohl für Ein- als auch Mehrschneckenextruder.t It is therefore a plasticizing unit for plasticizing and conveying thermoplastic material, characterized in that one extruder cylinder for varying the working length of the screw with at least two one behind the other closable openings for inserting the funnel is provided. This version of the cylinder is suitable for both for single and multi-screw extruders.

Diese Erfindung wird nachfolgend anhand einer in zwei Skizzen vereinfachten Darstellung beispielsweise erläutert:This invention is explained below using a simplified representation in two sketches, for example:

309807/1108309807/1108

Fig.. 1 zeigt einen Extruder mit einer Schnecke großer Arbeitslänge für die Verarbeitung von Massen mit hohem Plastifizierungsenergieinhalto Fig. 1 shows an extruder with a screw of great working length for processing masses with a high plasticization energy content

Pig. 2 zeigt die gleiche Maschine mit einer Schnecke kurzer Arbeitslänge für Massen mit niedrigem Plastifizierungsenergieinhalt. Die frühere Entgasungsöffnung dient hier als Einfüllöffnung.Pig. Figure 2 shows the same machine with a short auger Working length for masses with low plasticization energy content. The former degassing opening serves as a filling opening here.

Die in Fig. 1 dargestellte Schneckenpresse weist im relativ langen Zylinder 6 von konstantem Durchmesser drei Zylinderöffnüngen 1, 2 und 3 auf. Öffnung 1 dient als Einfüllöffnung, Öffnung 2 wird als Entgasungsöffnung benutzt, während Öffnung 3, beispielsweise durch einen Stopfen, verschlossen ist. Je nach Erfordernis und Schneckengeometrie könnte auch 2 verschlossen und 3 als Entgasungsöffnung verwendet sein oder auch beide Öffnungen 2 und 3 verschlossen sein. 4 ist ein Winkelspritzkopf, 5 der Schneckenantrieb, 7 die Schnecke mit großer Arbeitslänge, die zwischen Aufgabeöffnung 1 und Antrieb 5 ein relativ kurzes Kupplungsstück aufweist.The screw press shown in Fig. 1 has a relatively long Cylinder 6 of constant diameter has three cylinder openings 1, 2 and 3. Opening 1 serves as a filling opening, opening 2 becomes used as a degassing opening, while opening 3, for example by a plug, is closed. Depending on the requirement and screw geometry could also be 2 closed and 3 used as a degassing opening or both openings 2 and 3 to be introverted. 4 is an angle spray head, 5 is the screw drive, 7 is the screw with a long working length, which is between Feed opening 1 and drive 5 has a relatively short coupling piece.

In Fig. 2 ist die Maschine mit der Schnecke 8 von verkürzter Arbeitslänge (9) dargestellt. Der Aufgabetrichter ist nun auf der mittleren Öffnung 2 montiert, wodurch die wirksame Schneckenlänge um den Abstand zwischen Öffnung 1 und 2 verkürzt wird. Öffnung 3 ist hier als Entgasungsöffnung wirksam.In Fig. 2 the machine with the screw 8 is shortened Working length (9) shown. The feed hopper is now mounted on the central opening 2, which increases the effective length of the screw is shortened by the distance between opening 1 and 2. Opening 3 is effective here as a degassing opening.

Für normale Extrusion wäre Öffnung 3 verschlossen. Die Entgasungsöffnungen können natürlich ebenso gut zum Zudosieren von Zusatzstoffen verwendet werden. Um am Aufgabetrichter kühlen zu können,müssen alle Zylinderöffnungen kühlbar sein.Opening 3 would be closed for normal extrusion. The degassing openings can of course just as well be used to add additives. To at the feed hopper To be able to cool, all cylinder openings must be coolable.

309807/ 1 108309807/1 108

Claims (3)

Patentansprüche :Patent claims: Plastifiziereinheit zum Fördern und Plastifizieren von thermoplastischen Hassen, dadurch gekennzeichnet, daß ein Extruderzylinder zur Variation der Arbeitslängen der Schnecke mit mindestens zwei hintereinanderliegenden verschließbaren
Öffnungen zum Einsetzen des Einfülltrichters versehen ist.Plasticizing unit for conveying and plasticizing thermoplastic materials, characterized in that an extruder cylinder for varying the working lengths of the screw with at least two closable ones one behind the other
Openings for inserting the funnel is provided. 2) Plastifiziereinheit nach Anspruch 1, dadurch gekennzeichnet, daß vor dem Einfülltrichter liegende Öffnungen zum Entgasen oder Zudosieren von Mischungskomponenten verwendet werden.2) plasticizing unit according to claim 1, characterized in that that openings in front of the hopper are used for degassing or metering in mixture components. 3) Plastifiziereinheit nach Anspruch 1, dadurch gekennzeichnet, daß sie mit austauschbaren Schnecken versehen ist, deren
Gewindegänge nur bis zur jeweiligen Position des Einfülltrichters geschnitten sind.3) plasticizing unit according to claim 1, characterized in that it is provided with interchangeable screws whose
Threads are only cut up to the respective position of the feed funnel. 7/11087/1108 Lee rseiteLee r side
DE2139385A 1971-08-06 1971-08-06 PLASTICIZING UNIT FOR THERMOPLASTIC MOLDING COMPOUNDS Pending DE2139385A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2139385A DE2139385A1 (en) 1971-08-06 1971-08-06 PLASTICIZING UNIT FOR THERMOPLASTIC MOLDING COMPOUNDS
FR7228239A FR2148486A1 (en) 1971-08-06 1972-08-04 Scroll plasticizing extruder - for thermoplastic material with an adjustable working screw length

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2139385A DE2139385A1 (en) 1971-08-06 1971-08-06 PLASTICIZING UNIT FOR THERMOPLASTIC MOLDING COMPOUNDS

Publications (1)

Publication Number Publication Date
DE2139385A1 true DE2139385A1 (en) 1973-02-15

Family

ID=5815965

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2139385A Pending DE2139385A1 (en) 1971-08-06 1971-08-06 PLASTICIZING UNIT FOR THERMOPLASTIC MOLDING COMPOUNDS

Country Status (2)

Country Link
DE (1) DE2139385A1 (en)
FR (1) FR2148486A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8523692U1 (en) * 1985-08-17 1987-10-15 Schleberger, Albert, 5600 Wuppertal, De
FR2613660A1 (en) * 1987-04-10 1988-10-14 Marcel Manceau Injection unit for a press, comprising an injection barrel housing a piston screw, provided with a multi-purpose auxiliary lateral orifice

Also Published As

Publication number Publication date
FR2148486A1 (en) 1973-03-23

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