DE10034468A1 - Screen changer for a plastic melt flow line has a housing which incorporates a pump - Google Patents

Screen changer for a plastic melt flow line has a housing which incorporates a pump

Info

Publication number
DE10034468A1
DE10034468A1 DE10034468A DE10034468A DE10034468A1 DE 10034468 A1 DE10034468 A1 DE 10034468A1 DE 10034468 A DE10034468 A DE 10034468A DE 10034468 A DE10034468 A DE 10034468A DE 10034468 A1 DE10034468 A1 DE 10034468A1
Authority
DE
Germany
Prior art keywords
screen changer
pump
melt pump
housing
screen
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Withdrawn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
DE10034468A
Other languages
German (de)
Inventor
Jan-Udo Kreyenborg
Rolf-Ruediger Stude
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.)
Kreyenborg Verwaltung und Beteiligungen GmbH and Co KG
Original Assignee
Kreyenborg Verwaltung und Beteiligungen GmbH and Co KG
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 Kreyenborg Verwaltung und Beteiligungen GmbH and Co KG filed Critical Kreyenborg Verwaltung und Beteiligungen GmbH and Co KG
Priority to DE10034468A priority Critical patent/DE10034468A1/en
Publication of DE10034468A1 publication Critical patent/DE10034468A1/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Withdrawn legal-status Critical Current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
    • B29C48/27—Cleaning; Purging; Avoiding contamination
    • B29C48/2725—Cleaning; Purging; Avoiding contamination of filters
    • B29C48/273—Cleaning; Purging; Avoiding contamination of filters using back flow
    • 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
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
    • 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
    • B29C48/69—Filters or screens for the moulding material
    • 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
    • B29C48/69—Filters or screens for the moulding material
    • B29C48/691—Arrangements for replacing filters, e.g. with two parallel filters for alternate use
    • B29C48/6912—Arrangements for replacing filters, e.g. with two parallel filters for alternate use the filters being fitted on a single rectilinearly reciprocating slide
    • 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
    • B29C48/25—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
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps

Landscapes

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

Abstract

For shortening the melt flow path between the screen changer and a melt pump the screen bolt(1) and pump(2) are integrated in a common housing(3).

Description

Die Erfindung bezieht sich auf einen Siebwechsler mit in Fließ­ richtung eines fluidalen Kunststoffstromes vorgeschalteter oder nachgeschalteter Schmelzepumpe.The invention relates to a screen changer with in flow direction of a fluid plastic flow upstream or downstream melt pump.

Aus der DE 198 31 495 A1 ist ein Siebwechsler mit zugeordne­ tem Arbeitsgerät bekannt. Bei dieser bekannten Anordnung wird im Gehäuse des Siebwechslers eine Ausnehmung vorgesehen, in die ein Anschlußring einsetzbar ist, wobei dieser Anschlußring innerhalb der Ausnehmung durch entsprechende Schraubmittel festgelegt werden kann. Der Anschlußring trägt von seiner In­ nenseite, also der Seite, die zum Gehäuse des Siebwechslers hin gerichtet ist, eingebrachte Befestigungsschrauben, die das Arbeitsgerät tragen, und nunmehr wird das Arbeitsgerät mit dem Anschlußring in die Ausnehmung im Gehäuse des Siebwechs­ lers eingesetzt und hier durch schräg zum Außenrand des Anschlußringes angeordnete Klemmschrauben festgelegt. Der Anschlußring weist dabei einen Durchflußkanal auf, der an die Eintrittsbohrung zum Arbeitsgerät und an die Austrittsbohrung zum Siebwechslergehäuse angepaßt ist.DE 198 31 495 A1 describes a screen changer system known. In this known arrangement a recess is provided in the screen changer housing, into which a connection ring can be inserted, this connection ring inside the recess using appropriate screwing means can be set. The connecting ring carries from its In side, i.e. the side that leads to the housing of the screen changer is directed, inserted mounting screws that the Wear work tool, and now the work tool with the Connection ring in the recess in the housing of the screen change used and here through diagonally to the outer edge of the Connection ring arranged clamping screws set. The Connection ring has a flow channel that to the Entry hole to the implement and to the exit hole is adapted to the screen changer housing.

Auch in der US-PS 52 67 847 wird ein kompaktes System vor­ geschlagen, bei welchem einem Sieb eine Schmelzepumpe zu­ geordnet ist. Auch hier erfolgt der Anschluß des Arbeitsgerätes, d. h. der Schmelzepumpe über Adapter an den Siebwechsler bzw. Extruder. Diese Vorrichtung baut außerordentlich lang und benötigt viele Bauteile. Für alle diese einzelnen Bauteile sind Heizungsregelungen erforderlich, und die Wege des Kunststoff­ materials werden durch diese Anordnung außerordentlich ver­ längert.A compact system is also proposed in US Pat. No. 5,267,847 beaten, in which a sieve a melt pump is ordered. The implement is also connected here, d. H. the melt pump via adapter to the screen changer or extruder. This device is extremely long and requires many components. For all of these individual components are Heating regulations required, and the ways of the plastic materials are extremely ver by this arrangement extended.

Der Erfindung liegt die Aufgabe zugrunde, eine kompakte An­ ordnung zu schaffen, bei der auf die verschiedenen Adapter und Anschlußringe verzichtet werden kann und die außerdem eine gute Isolierung ermöglicht.The invention has for its object a compact to create order on the different adapters and Connection rings can be dispensed with and also a good insulation allows.

Diese der Erfindung zugrundeliegende Aufgabe wird durch die Lehre des Hauptanspruches gelöst, d. h. dadurch, daß Sieb­ wechsler und Schmelzepumpe in einem gemeinsamen Gehäuse angeordnet sind. Hierbei ist es möglich, die Schmelzepumpe in Fließrichtung des Kunststoffstromes gesehen vor dem Sieb­ wechsler oder hinter dem Siebwechsler anzuordnen.This object of the invention is achieved by Doctrine of the main claim solved, d. H. in that sieve changer and melt pump in a common housing are arranged. Here it is possible to put the melt pump in Flow direction of the plastic stream seen in front of the sieve changer or to be arranged behind the screen changer.

Gegenüber den im Stand der Technik bekannten Einrichtungen hat die erfindungsgemäße Anordnung den Vorteil, daß keine Adapter mehr eingesetzt werden müssen, so daß ein kurzer Weg für das zu verarbeitende Kunststoffmaterial geschaffen wird. Ein Vercracken des Kunststoffmaterials in dieser kurzbau­ enden Einrichtung ist nicht mehr möglich.Compared to the devices known in the prior art the arrangement according to the invention has the advantage that none Adapters must be used more, so that a short Path created for the plastic material to be processed becomes. Cracking of the plastic material in this short construction End setup is no longer possible.

Gleichzeitig werden kurze Verweilzeiten des Kunststoffstromes erreicht und die bisher erforderlichen zusätzlichen Dichtflächen vermieden. Die Schmelzepumpe schließt unmittelbar an die Ein­ trittsseite des Siebwechslers an. Da das einteilige Gehäuse eine gute Isolierung ermöglicht, ist auch nur eine einzige Heizungs­ regelung erforderlich.At the same time there are short dwell times for the plastic stream reached and the previously required additional sealing surfaces avoided. The melt pump connects directly to the on the side of the screen changer. Since the one-piece housing is a good insulation allows for even a single heater regulation required.

Wird die Schmelzepumpe in Fließrichtung des Kunststoffstro­ mes gesehen hinter dem Siebwechsler angeordnet, wird hier­ durch trotz Rückspülen der im Siebwechsler angeordneten Sie­ be ein gleicher Druck an der Angabeseite der Pumpe erreicht, so daß hier bei der Herstellung von Präzisionsprodukten keine Störungen im Kunststoffstrom in dessen Dichte und in dessen Konsistenz auftreten können.If the melt pump is in the direction of flow of the plastic stream Seen behind the screen changer, is here by backwashing the arranged in the screen changer be at the same pressure on the specified side of the pump,  so that here in the manufacture of precision products none Disruptions in the plastic flow in its density and in its Consistency can occur.

Die Anordnung der Schmelzepumpe hinter dem Siebwechsler in Fließrichtung gesehen hat weiterhin den Vorteil, daß bei emp­ findlichen Pumpen sichergestellt ist, daß keinerlei Schmutz in die Pumpe eintreten kann.The arrangement of the melt pump behind the screen changer in Flow direction has the further advantage that at emp sensitive pumps is ensured that no dirt in the pump can enter.

Der erfindungsgemäße Vorschlag läßt sich sowohl bei kontinu­ ierlich arbeitenden Siebwechslern wie auch bei diskontinuierlich arbeitenden Siebwechslern einsetzen.The proposal according to the invention can be both in continuous sieve changers that work in the same way as discontinuous ones insert working screen changer.

Ausführungsbeispiele der Erfindung werden nachfolgend an­ hand der Zeichnungen erläutert. Die Zeichnungen zeigen dabei inExemplary embodiments of the invention are described below hand of the drawings explained. The drawings show in

Fig. 1 in einer schematischen Schnittdarstellung in Drauf­ sicht und Seitenansicht einen kontinuierlich arbei­ tenden Siebwechsler mit Schmelzepumpe, in Fig. 1 is a schematic sectional view in plan view and side view of a continuously working screen changer with melt pump, in

Fig. 2 in einer Darstellungsart gemäß Fig. 1 die Anord­ nung der Schmelzepumpe in Fließrichtung des Kunststoffstromes gesehen hinter dem Siebwechs­ ler, in Fig. 2 seen in a representation according to FIG. 1, the arrangement of the melt pump in the flow direction of the plastic stream behind the screen changer, in

Fig. 3 einen diskontinuierlich arbeitenden Siebwechsler mit in Fließrichtung gesehen vor dem Siebwechsler angeordneter Schmelzepumpe und in Fig. 3 shows a discontinuously working screen changer with the melt pump arranged in front of the screen changer and in

Fig. 4 eine Anordnung gemäß Fig. 3, wobei die Schmel­ zepumpe hinter den Siebwechsler in Fließrichtung des Kunststoffstromes gesehen angeordnet ist. Fig. 4 shows an arrangement according to FIG. 3, wherein the melt pump is arranged behind the screen changer seen in the flow direction of the plastic stream.

In den Zeichnungen ist schematisch bei 1 ein Siebwechsler dar­ gestellt, der zusammen mit einer Schmelzepumpe 2 in einem Gehäuse 3 angeordnet ist. Bei 4 ist der Antrieb für die Schmel­ zepumpe erkennbar und der Siebbolzenantrieb ist bei 5 ange­ deutet.In the drawings, a screen changer is shown schematically at 1, which is arranged together with a melt pump 2 in a housing 3 . At 4 the drive for the melt pump is recognizable and the sieve pin drive is indicated at 5.

Die Fließrichtung des Kunststoffstromes ist jeweils mit dem Be­ zugszeichen F eingezeichnet.The direction of flow of the plastic stream is in each case with the loading traces F drawn.

Fig. 1 zeigt einen sogenannten kontinuierlichen Siebwechsler, d. h. einen Siebwechsler, bei dem ein Rückspülen möglich ist, wobei die Schmelzepumpe 2 mit ihrer Austrittsseite an die Ein­ trittsseite der beiden zu den Siebbolzen führenden Kanälen an­ geordnet ist. Fig. 1 shows a so-called continuous screen changer, ie a screen changer in which backwashing is possible, the melt pump 2 being arranged with its outlet side on the inlet side of the two channels leading to the sieve bolts.

Bei der Anordnung gemäß Fig. 2 ist die Fließrichtung F des Kunststoffstromes umgekehrt, d. h. die Schmelzepumpe 2 wird nur mit hochreinem Kunststoff beschickt, so daß trotz Rückspü­ lens kein Schmutz in die Schmelzepumpe 2 eintreten kann.In the arrangement according to FIG. 2, the flow direction F is the plastic flow reversed, ie, the melt pump 2 is charged with high-purity plastic material, so that, despite Rückspü lens dirt can not enter the melt pump 2.

Eine solche Anordnung ist besonders vorteilhaft, da an der Ab­ gabeseite der Schmelzepumpe 2 ein gleicher Druck erzeugt wird, der für die Herstellung von Präzisionsprodukten von Be­ deutung ist.Such an arrangement is particularly advantageous, since on the output side of the melt pump 2 an equal pressure is generated, which is of importance for the production of precision products.

Bei der Anordnung gemäß Fig. 3 ist ein diskontinuierlich arbei­ tender Siebwechsler 1 dargestellt. Hier ist die Schmelzepumpe in Fließrichtung F des Kunststoffstromes vor dem Siebwechsler vorgesehen, und bei der Anordnung gemäß Fig. 4, die ebenfalls einen diskontinuierlichen Siebwechsler darstellt, ist wiederum die Schmelzepumpe hinter dem Siebwechsler in Fließrichtung des Kunststoffstromes gesehen vorgesehen.In the arrangement of Fig. 3 is shown a discontinuous processing border screen changer. 1 Here, the melt pump is provided in the flow direction F of the plastic stream upstream of the screen changer, and in the arrangement according to FIG. 4, which also represents a discontinuous screen changer, the melt pump is again provided behind the screen changer in the flow direction of the plastic stream.

Claims (3)

1. Siebwechsler mit in Fließrichtung eines fluidalen Kunst­ stoffstromes vorgeschalteter oder nachgeschalteter Schmelzpumpe, dadurch gekennzeichnet, daß Siebwechs­ ler (1) und Schmelzpumpe (2) in einem gemeinsamen Ge­ häuse (3) angeordnet sind.1. Screen changer, characterized by material flow in the flow direction of a fluidic art upstream or downstream melt pump that Siebwechs are arranged ler (1) and melt pump (2) in a common housing Ge (3). 2. Siebwechsler nach Anspruch 1, dadurch gekennzeichnet, daß die Schmelzepumpe (2) in Fließrichtung des Kunst­ stoffstromes vor dem Siebwechsler (1) angeordnet ist. 2. Screen changer according to claim 1, characterized in that the melt pump (2) in the flow direction of the plastics material stream in front of the screen changer (1) is arranged. 3. Siebwechsler nach Anspruch 1, dadurch gekennzeichnet, daß die Schmelzepumpe (2) in Fließrichtung des Kunst­ stoffstromes hinter dem Siebwechsler (1) angeordnet ist.3. Screen changer according to claim 1, characterized in that the melt pump (2) in the flow direction of the plastics material stream behind the screen changer (1) is arranged.
DE10034468A 2000-07-15 2000-07-15 Screen changer for a plastic melt flow line has a housing which incorporates a pump Withdrawn DE10034468A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10034468A DE10034468A1 (en) 2000-07-15 2000-07-15 Screen changer for a plastic melt flow line has a housing which incorporates a pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10034468A DE10034468A1 (en) 2000-07-15 2000-07-15 Screen changer for a plastic melt flow line has a housing which incorporates a pump

Publications (1)

Publication Number Publication Date
DE10034468A1 true DE10034468A1 (en) 2002-01-31

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DE10034468A Withdrawn DE10034468A1 (en) 2000-07-15 2000-07-15 Screen changer for a plastic melt flow line has a housing which incorporates a pump

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007121696A1 (en) * 2006-04-24 2007-11-01 Maag Pump Systems Textron Gmbh A plastics-processing system and plastics-processing system and a method for its control
US7722444B2 (en) 2005-05-13 2010-05-25 Black & Decker Inc. Angle grinder
DE102012025259A1 (en) 2012-12-21 2014-06-26 Maag Pump Systems Gmbh Block carrier with integrated continuous casting device for thermoplastics
EP3051241B1 (en) * 2015-01-30 2019-08-14 Andritz Technology and Asset Management GmbH Dispensing device for pasty products on a belt

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19602091A1 (en) * 1996-01-22 1997-07-24 Uth Gmbh Machine for plasticising and extruding cold rubber mixture strip
DE19831495A1 (en) * 1998-07-14 2000-01-20 Kreyenborg Verwaltungen Exchange unit for sieves treating flow of molten liquid plastic has flange connection to downstream equipment, minimizing flow path, obviating heaters and controls in readily-aligned, compact unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19602091A1 (en) * 1996-01-22 1997-07-24 Uth Gmbh Machine for plasticising and extruding cold rubber mixture strip
DE19831495A1 (en) * 1998-07-14 2000-01-20 Kreyenborg Verwaltungen Exchange unit for sieves treating flow of molten liquid plastic has flange connection to downstream equipment, minimizing flow path, obviating heaters and controls in readily-aligned, compact unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7722444B2 (en) 2005-05-13 2010-05-25 Black & Decker Inc. Angle grinder
WO2007121696A1 (en) * 2006-04-24 2007-11-01 Maag Pump Systems Textron Gmbh A plastics-processing system and plastics-processing system and a method for its control
DE102012025259A1 (en) 2012-12-21 2014-06-26 Maag Pump Systems Gmbh Block carrier with integrated continuous casting device for thermoplastics
DE102012025259B4 (en) * 2012-12-21 2016-03-17 Maag Automatik Gmbh Block carrier with integrated continuous casting device for thermoplastics and granulating device
EP3051241B1 (en) * 2015-01-30 2019-08-14 Andritz Technology and Asset Management GmbH Dispensing device for pasty products on a belt

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