DE2124466A1 - Scroll extruder - with radially displacing rams of adjustable stroke and speed in the scroll housing - Google Patents

Scroll extruder - with radially displacing rams of adjustable stroke and speed in the scroll housing

Info

Publication number
DE2124466A1
DE2124466A1 DE19712124466 DE2124466A DE2124466A1 DE 2124466 A1 DE2124466 A1 DE 2124466A1 DE 19712124466 DE19712124466 DE 19712124466 DE 2124466 A DE2124466 A DE 2124466A DE 2124466 A1 DE2124466 A1 DE 2124466A1
Authority
DE
Germany
Prior art keywords
extruder
housing
scroll
rams
speed
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Withdrawn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
DE19712124466
Other languages
German (de)
Other versions
DE2124466B2 (en
Inventor
Curt Dipl.-Ing. 2101 Westerhof Brandis
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.)
Fried Krupp AG
Original Assignee
Fried Krupp 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 Fried Krupp AG filed Critical Fried Krupp AG
Priority to DE2124466A priority Critical patent/DE2124466B2/en
Publication of DE2124466A1 publication Critical patent/DE2124466A1/en
Publication of DE2124466B2 publication Critical patent/DE2124466B2/en
Withdrawn legal-status Critical Current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
    • B29C48/36—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
    • B29C48/92—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—Pressure
    • 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
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/92714—Degree of crosslinking, solidification, crystallinity or homogeneity
    • 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
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • 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

Abstract

The housing has several openings distributed about its circumference at one or more points along its length with radially displacing rams in the openings. Pref. the stroke and speed of the rams can be regulated according to the material used. The ram heads are contoured to correspond with the housing.

Description

Extruder Die Erfindung bezieht sich auf einen Extruder für die Verarbeitung von Kunststoffen und Elastomeren mit in einem Extrudergehäuse sich drehender Förderschnecke. Extruder The invention relates to an extruder for processing of plastics and elastomers with a screw conveyor rotating in an extruder housing.

Im allgemeinen sollen Extruder mehrere Teilaufgaben bei der Verarbeitung von Kunststoffen gleichzeitig bewältit gen. Neben dem Ausformen von Profilen ist das zu verarbeitende Material zu masti#zieren, zu mischen, zu homogenisieren, aufzuschmelzen, durchzukneten usw.. Je nach dem, welche der Teilaufgaben im Vordergrund stehen, sind Aufbau und Betriebsweise der bekannten Extruder unter~ schiedlich. Hierbei sind Anpassungen an verschiedene Einsatz zwecke im wesentlichen durch die Gestalt der Extruderschnecke und ihre Abstimmung auf die Gehäuseform möglich, da angenommen wird, daß sich die dafür ausschlaggebende Charakteristik des Druckaufbaues zum Schneckenende hin dadurch am besten verwirklichen bzw. beeinflussen läßt.In general, extruders should have several sub-tasks during processing of plastics at the same time. In addition to the shaping of profiles, to masticate, mix, homogenize, melt the material to be processed, to knead, etc. Depending on which of the subtasks are in the foreground, The construction and mode of operation of the known extruders are different. Here are adaptations for different purposes mainly through the shape the extruder screw and its adjustment to the shape of the housing is possible, as assumed becomes that the decisive characteristic of the pressure build-up towards the end of the screw in this way can best be realized or influenced.

Die bisher ausgeführten Extruderkonstruktionen lassen jedoch noch einiges zu wünschen übrig in der optimalen Abstimmung der Einzelwirkungen bei der Lösung der Teilaufgaben, vor allem aber in ihrer Anpassungsfthigkeit an sich ändernde Betriebsbedingungen. Es ist Aufgabe der vorliegenden Erfindung, diese Nachteile zu vermeiden und einen Extruder zu schaffen, der sowohl eine bessere Leistung in einem speziellen Auslegungspunkt als auch eine vergleichbare Leistung in einem breiten Bereich abweichender Einsatzbedingungen gewährleistet.The extruder designs carried out so far, however, still allow a lot to be desired in the optimal coordination of the individual effects in the Solving the subtasks, but above all in their adaptability to changing ones Operating conditions. It is the object of the present invention to address these disadvantages avoiding and creating an extruder that performs better in both a special design point as well as a comparable performance in a wide range Range of deviating conditions of use guaranteed.

Danach wird vorgeschlagen, daß das Extrudergehäuse an ein oder mehreren Stellen seiner Länge mit mehreren auf dem Umfang verteilten Öffnungen versehen ist, in denen radial zur Förderschnecke verschiebliche Stempel angeordnet sind. Der Vorschlag beruht auf der Erkenntnis, daß der angestrebte Druckaufbau nicht nur von einer Stelle, nämlich am Ende der Extruderschnecke her bestimmt werden sollte, sondern daß es zweckmäßig ist, ihn auch über die Schneckenlänge zu beeinflussen. Durch die erSindungsgemäße Maßnahme ist gleichzeitig eine umfangreiche Variationsmöglichkeit bei der Beeinflussung des Druckverlaufs gegeben. Praktisch kann der Druckverlauf nunmehr gesteuert werden. Das hat z.B. zur Folge, daß sowohl der Masts zierungs- als auch der Homogenisierungseffekt für eine Vielzahl von verschiedenen zu verarbeitenden Materialien optimal eingestellt und abgestimmt werden kann. Zur Erzielung lediglich besserer Mastizierung werden die Stempel radial weiter in den Innenraum eingeschoben. Sie wirken dann als Drossel, die die Knetwirkung verbessert. Soll eine bessere Homogenisierung erreicht werden, können die Stempel abwechselnd ein- und auswärts bewegt werden. Deshalb sind sie gemäß einem weiteren Schritt der Erfindung mit einem nach Hub und Frequenz der Verschiebung regelbaren Antrieb ausgestattet. Die Regelbarkeit erlaubt die für das jeweilige Verarbeitungsergebnis günstigste Einstellung.It is then proposed that the extruder housing on one or more Parts of its length are provided with several openings distributed around the circumference, in which plungers that can be moved radially to the screw conveyor are arranged. The suggestion is based on the knowledge that the desired pressure build-up not only from one point, namely at the end of the extruder screw should be determined, but that it it is advisable to influence it via the length of the screw. By the inventive Measure is at the same time an extensive possibility of variation in influencing given the pressure curve. In practice, the pressure curve can now be controlled. This has the consequence, for example, that both the fattening and the homogenizing effect optimally set for a multitude of different materials to be processed and can be tuned. To achieve better mastication only be the punch pushed radially further into the interior. They then act as a throttle, which improves the kneading effect. If better homogenization is to be achieved, the punches can be moved alternately in and out. That's why they are according to a further step of the invention with a stroke and frequency of the displacement adjustable drive. The controllability allows for the respective Processing result most favorable setting.

Weiterhin empfiehlt es sich, den Arbeitsflächen der Stempel eine Form entsprechend der Kontur des Extrudergehäuses an der betreffenden Stelle zu geben, damit eine Stempelstellung einstellbar ist, bei der die Innenwand des Gehäuses den ursprünglichen durchgehenden Verlaut ohne Störung der Strömung hat. Darüberhinaus können die Arbeitsflächen der Stempel auch vorteilhaft mit Siebscheiben oder ähnlichen, die Homogenisierung fördernden Elementen versehen sein, die sich in den Verarbeitungsfluß einschieben lassen.It is also recommended that the working surfaces of the stamps have a shape according to the contour of the extruder housing at the relevant point, so that a stamp position is adjustable in which the inner wall of the housing the original continuous sounding without disturbing the flow. Furthermore can the working surfaces of the stamps also advantageously have sieve disks or similar elements which promote homogenization are provided slide into the processing flow.

In der Zeichnung ist ein Ausführungsbeispiel eines erfindungsgemaßen Extrudergehäuses im Schnitt dargestellt.In the drawing is an embodiment of an inventive Extruder housing shown in section.

Ein zylindrisches Extrudergehäuse 1 enthält eine Förderschnecke 2. Das Extrudergehäuse 1 ist an zwei einander gegenüberliegenden Stellen mit einer Öffnung versehen.A cylindrical extruder housing 1 contains a screw conveyor 2. The extruder housing 1 is at two opposite points with a Opening provided.

In den Öffnungen sind in Stempelführungen 3 Stempel 4 verschiebbar angeordnet. Der Antrieb für die radiale Stempelbewegung in Pfeilrichtung erfolgt durch Kurbeltriebe, hydraulisch oder über Pneumatikzylinder. Die Schneckenstege 5 der Förderschnecke 2 sind im Bereich der Arbeitsflächen 6 der Stempel 4 unterbrochen, um ein Eindringen r Stempel 4 in den Innenraum des Extruder gehäuses 1 über die Schneckensteghöhe zu ermöglichen.In the openings 3 stamps 4 are displaceable in stamp guides arranged. The drive for the radial punch movement takes place in the direction of the arrow by crank drives, hydraulically or via pneumatic cylinders. The spiral webs 5 of the screw conveyor 2 are interrupted in the area of the work surfaces 6 of the punch 4, to penetration r punch 4 in the interior of the extruder housing 1 on the To enable screw flight height.

Patentansprüche: Patent claims:

Claims (4)

Patentansprüche: 1. Extruder für die Verarbeitung von Kunststoffen und Elastomeren mit in einem Extrudergehäuse sich drehender Förderschnecke, dadurch gekennzeichnet, daß das Gehäuse (1) an ein oder mehreren Stellen seiner Länge mit mehreren auf dem Umfang verteilten Öffnungen versehen ist, in denen radial zur Förderschnecke (2) verschiebliche Stempel (4) angeordnet sind. Claims: 1. Extruder for processing plastics and elastomers with a screw conveyor rotating in an extruder housing, thereby characterized in that the housing (1) at one or more points along its length with several circumferentially distributed openings is provided in which radially to the screw conveyor (2) displaceable stamp (4) are arranged. 2. Extruder nach Anspruch 1, dadurch gekennzeichnet, daß die Stempel (4) mit einem nach Hub und Frequenz der Verschiebung regelbaren Antrieb ausgestattet sind.2. Extruder according to claim 1, characterized in that the punch (4) Equipped with a drive that can be regulated according to the stroke and frequency of the displacement are. 3. Extruder nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Arbeitsflächen (6) der Stempel (4) entsprechend der Kontur des Extrudergehäuses (1) an der betreffenden Stelle geformt sind.3. Extruder according to claim 1 or 2, characterized in that the Working surfaces (6) of the punch (4) according to the contour of the extruder housing (1) are shaped at the relevant point. 4. Extruder nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Arbeitsflächen (6) mit Siebscheiben oder ähnlichen, die Homogenisierung fördernden Elementen versehen sind.4. Extruder according to claim 1 or 2, characterized in that the Work surfaces (6) with sieve discs or similar that promote homogenization Elements are provided.
DE2124466A 1971-05-17 1971-05-17 Extruder for processing plastics and elastomers Withdrawn DE2124466B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2124466A DE2124466B2 (en) 1971-05-17 1971-05-17 Extruder for processing plastics and elastomers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2124466A DE2124466B2 (en) 1971-05-17 1971-05-17 Extruder for processing plastics and elastomers

Publications (2)

Publication Number Publication Date
DE2124466A1 true DE2124466A1 (en) 1972-11-30
DE2124466B2 DE2124466B2 (en) 1978-09-28

Family

ID=5808146

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2124466A Withdrawn DE2124466B2 (en) 1971-05-17 1971-05-17 Extruder for processing plastics and elastomers

Country Status (1)

Country Link
DE (1) DE2124466B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2417116A1 (en) * 1974-04-08 1975-10-16 Krupp Gmbh MIXED EXTRUDERS
DE2937688A1 (en) * 1978-09-26 1980-04-10 Usm Corp EXTRUDER WITH ADJUSTABLE HOMOGENIZATION LEVEL
DE2924269A1 (en) * 1979-06-15 1980-12-18 Werner & Pfleiderer Flow regulator on plastics extruder barrel - where diametrically opposite rams mounted on the barrel operate together under fine control
FR2576833A1 (en) * 1985-02-06 1986-08-08 Berstorff Gmbh Masch Hermann DEVICE FOR ADJUSTING HOMOGENIZATION RODS FOR AN EXTRUDER WITH HOMOGENIZATION RODS INTENDED FOR THE WORKING OF RUBBER OR SYNTHETIC THERMOPLASTIC OR EQUIVALENT MATERIALS
EP0209328A2 (en) * 1985-07-16 1987-01-21 Farrel Corporation Screw extruders

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103261A1 (en) * 1991-02-04 1992-08-13 Berstorff Gmbh Masch Hermann Process and appts. for min. start=up loss in cold-fed extruder - comprises adjustable throttle controlled by pressure in feed zone, avoiding incomplete melting and porosity and start=up without die

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2417116A1 (en) * 1974-04-08 1975-10-16 Krupp Gmbh MIXED EXTRUDERS
DE2937688A1 (en) * 1978-09-26 1980-04-10 Usm Corp EXTRUDER WITH ADJUSTABLE HOMOGENIZATION LEVEL
DE2924269A1 (en) * 1979-06-15 1980-12-18 Werner & Pfleiderer Flow regulator on plastics extruder barrel - where diametrically opposite rams mounted on the barrel operate together under fine control
FR2576833A1 (en) * 1985-02-06 1986-08-08 Berstorff Gmbh Masch Hermann DEVICE FOR ADJUSTING HOMOGENIZATION RODS FOR AN EXTRUDER WITH HOMOGENIZATION RODS INTENDED FOR THE WORKING OF RUBBER OR SYNTHETIC THERMOPLASTIC OR EQUIVALENT MATERIALS
EP0209328A2 (en) * 1985-07-16 1987-01-21 Farrel Corporation Screw extruders
EP0209328A3 (en) * 1985-07-16 1988-06-01 Farrel Corporation Screw extruders

Also Published As

Publication number Publication date
DE2124466B2 (en) 1978-09-28

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