DE2056656A1 - Feed hopper for extruders - with hollow feed screw contg a movable piston - Google Patents
Feed hopper for extruders - with hollow feed screw contg a movable pistonInfo
- Publication number
- DE2056656A1 DE2056656A1 DE19702056656 DE2056656A DE2056656A1 DE 2056656 A1 DE2056656 A1 DE 2056656A1 DE 19702056656 DE19702056656 DE 19702056656 DE 2056656 A DE2056656 A DE 2056656A DE 2056656 A1 DE2056656 A1 DE 2056656A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- screw
- extruders
- feed screw
- hollow
- 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
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
- 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
- B29C48/286—Raw material dosing
-
- 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
- B29C48/385—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in separate barrels
-
- 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
- B29C48/39—Plasticisers, homogenisers or feeders comprising two or more stages a first extruder feeding the melt into an intermediate location of a second extruder
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Einfüllvorrichtung, insbesondere fr Schnecken-und Kolbenpressen, spritzgießmaschinen od. dgl. Filling device, especially for screw and piston presses, injection molding machines or the like.
Die erfindung bezieht sich auf eine vorzugsweise trichterförmige einfüllvorrichtung insbesondere fUr Schnecken- und Solbenpressen, Spritzgießmaschinen od. dgl., mit einem eine Öffnung aufweisenden Ausgangsbereich und mit einer im Innern der Einfüllvorrichtung vorgesehenen Förderschnecke.The invention relates to a preferably funnel-shaped filling device especially for screw and piston presses, injection molding machines or the like an exit area having an opening and with one inside the filling device provided screw conveyor.
Bei Einfüllvorrichtungen dieser Art treten insbesondere bei dem Zuführen klebender und/oder schlecht rieselnder Kunststoffe leicht Brückenbildungen des einzufüllenden Gutes zwischen Ausgangsbereichsöffnung und Förderschnecke auf. Die@e Brückenbildungen führen in pritzgießmaschinen, Extrudern u- dgl., wahllos zu einer Verringerung oder auch Unterbrechung des durchlaufenden zu verarbeitenden z.B. durch Kunststoff gegebenen Gutes und damit zu einem ungleichen Xunststoffausstoß. Ungleiche, d.h.In the case of filling devices of this type, the feeding occurs in particular adhesive and / or poorly flowing plastics easily bridge the gap between the fillings Good things appear between the exit area opening and the screw conveyor. The @ e bridging lead in injection molding machines, extruders and the like, indiscriminately to a reduction or also interruption of the continuous process, e.g. given by plastic Good and thus an uneven plastic output. Unequal, i.e.
unvollständig erzeugte und daher mangelhafte Fertigungsartikel sind die Folge. Es sind auch bereits Schaumgießmaschinen bekannt, deren dem Plastifizicrzylinder zugeordnete Zufuhrbehälter Kunststoffteilchen an einen Dosierraum abgeben, in den ein Kolben einzutreten vermag, der die Xunststoffteilchen in festgelegter ilubfolge in den Plastifizierzylinder überführt. Diese Maschinen haben den Nachteil, daß die Linfüllvorrichtungen beim Zuleiten bestimmter Güter, z. B. faseriger, schl@cht rieselnder und/oder klebender Kunststoffe, unzureichend sind, Der Erfindung liegt die Aufgabe zugrunde, diesen Mangel zu vermeiden. Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß außer der Förderschnecke ein an sich bekannter Stopfkolben vorgesehen ist. Ein weiteres Merkmal der Erfindung besteht ferner darin, daß die Förderschnecke hohl ausgebildet und in diesem wohlraum ein längsbeweglicher Kolben angeordnet ist. Schließlich ist ein Erfindungsmerkmal noch dadurch gegeben, daß die eine Endstellung des Kolbens derart vorgesehen ist, daß er über das Ende der Schnecke hinausragt. Durch die erfindungsgemäße Einrichtung wird eine gleichtörmigere Zusarninensetzung des zur Verarbeitung gelangenden Gutes und die Möglichkeit der Anpassung der Zufuhr dieses Gutes zum Verarbeitungsbereich an die besondere Arbeitsweise der Verarbeitunqsanlage, z.B. einer Spritzgießmaschine, erreicht.are incompletely produced and therefore defective production items the consequence. There are also already known foam molding machines whose plasticizing cylinder assigned supply container dispense plastic particles to a metering chamber, into the a piston is able to enter, which moves the plastic particles in a fixed sequence transferred to the plasticizing cylinder. These machines have the disadvantage that the Linfüllvorrichtungen when feeding certain goods, such. B. fibrous, silting trickling and / or adhesive plastics are inadequate, The invention the underlying task is to avoid this deficiency. According to the invention this The object is achieved in that, in addition to the screw conveyor, a stuffing piston known per se is provided. Another feature of the invention is that the Conveyor screw is hollow and in this space a longitudinally movable piston is arranged. Finally, a feature of the invention is also given by the fact that the one end position of the piston is provided such that it over the end of the Snail protrudes. The device according to the invention results in a more uniform shape Composition of the goods to be processed and the possibility of Adaptation of the supply of this material to the processing area to the particular working method the processing plant, e.g. an injection molding machine.
In der Zeichnung ist ein Ausftlhrungsbeispiel der Erfindung im Grundzuge dargestellt.The drawing shows an exemplary embodiment of the invention in general shown.
Auf dem eine Schnecke 8 enthaltenden Gehäuse 1 eines Extruders oder der Plastifiziereinrichtung einer Spritzgießmaschine 2 ist ein Einfülltrichter 3 angeflanscht, in dem eine Förderschnecke 4 zentral zur Ausgangsöffnung 5 fliegend gelagert ist. Die Förderschnecke 4 endet ein Stück vor der Ausganqdffnung 5 des Einfülltrichters. Sie weist ferner eine zylinfrische, zum Ausgang hin verjüngte konische Kontur auf.On the housing 1 of an extruder containing a screw 8 or of the plasticizing device of an injection molding machine 2 is a filling funnel 3 flanged, in which a screw conveyor 4 is flying centrally to the outlet opening 5 is stored. The screw conveyor 4 ends a little before the outlet opening 5 of the Funnel. It also has a cylindrical fresh, tapered towards the exit conical contour.
Koaxial enthält die Förderschnecke 4 einen durchgehenden Kanal 6. In diesem Kanal ist ein an einer Kolbenstange 9 bfestigter Kolben 7 geführt.Coaxially, the screw conveyor 4 contains a continuous channel 6. In this channel a on a piston rod 9 is fastened Pistons 7 led.
Normalerweise ist der Kolben 7 zumindest im wesentlichen in den Kanal 6 der Förderschnecke 4 hineingezogen. Wird der Kolben aus deren Kanal 6 herausgeschoben, so trifft er auf das in den Bereich des Ausgangs 5 geförderte Gut, z.n. Kunststoffteile faseriger, schwer rieselnder, stark flockiger oder klebriger Art. Das Gut wird vom Kolben 7 zu der Schnecke 8 in zt engedrückt; bzw. verdichtet und dabei sicher zwischen die Gänge der Schnecke 6 eingeft»irt. Auf diese Weise kann zugleich eine Zumessung auch ungleichmäßig gestalteten Gutes erreicht werden.Normally the piston 7 is at least substantially in the channel 6 of the screw conveyor 4 pulled in. If the piston is pushed out of its channel 6, so he encounters the goods conveyed into the area of exit 5, e.g. Plastic parts fibrous, heavily trickling, very flaky or sticky kind Piston 7 pressed towards screw 8 in zt; or compressed and safe between the threads of the worm 6 are inserted. In this way, a metering can be carried out at the same time even unevenly shaped goods can be achieved.
Der Kolben 7 kann zugleich längs- und drehbeweglich in der Förderschnecke 4 angeordnet sein. Förderschnecke und Kolben können aber auch derart zeitweise bewegungsachlüssig miteinander verbunden sein, daß, wenn der Kolben 7 von der Schnecke 8 des Extruders oder der Spritzgießmaschine 2 entfernt, also in den anal 6 der Förderschnecke 4 zurückgezogen wird, diese zweckmäßig in Förderrichtung gesehen gedreht wird. Dabei wird neues Gut in den Ausgang 5 gefördert und der Kolben kann bei seinem nächsten liub Gut von neuem verdichten. Dabei muß der Kolben bei seinem Rückgang von der Förderschnecke entkuppelt werden Diese Maßnahme erlaubt auch, daß die Förderschnecke, insbesondere bei einem stufenlosen Antrieb, mit beliebiger Umdrehungszahl laufen und beliebig grobe Massen des Gutes in den Bereich des Ausgangs 5 fördern kann.The piston 7 can be moved longitudinally and rotatably in the screw conveyor at the same time 4 be arranged. However, the screw conveyor and piston can also be reluctant to move at times be interconnected that when the piston 7 from the screw 8 of the extruder or removed from the injection molding machine 2, i.e. into the anal 6 of the screw conveyor 4 is withdrawn, this is expediently rotated viewed in the conveying direction. Included new material is conveyed into the output 5 and the piston can with its next liub condense good again. The piston must move back from the Screw conveyor can be decoupled This measure also allows the screw conveyor, especially with a stepless drive, run at any number of revolutions and can convey arbitrarily large masses of the goods in the area of the exit 5.
Durch die Abstimmung der Umlaufgeschwindigkeit der Förderschnecke 4 und die zeitliche Hubfolge des Kolbens kann jeweil6 eine solche Masse des Gutes verdichtet, dem Extruder bzw.By coordinating the speed of rotation of the screw conveyor 4 and the chronological stroke sequence of the piston can in each case such a mass of the goods compressed, the extruder or
der Spritegießiltas cnine 2 zugeführt werden, die @eren wiederkehrendem Spritzvolumen entspricht. Im übrigen kann die Koiibination von Förderschnecke und Kolben zum besseren Mischen des Gutes dienen.the Spritegießiltas cnine 2 are fed, the @eren recurring Injection volume corresponds. In addition, the Koiibination of screw conveyor and Use flasks to better mix the goods.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702056656 DE2056656A1 (en) | 1970-11-18 | 1970-11-18 | Feed hopper for extruders - with hollow feed screw contg a movable piston |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702056656 DE2056656A1 (en) | 1970-11-18 | 1970-11-18 | Feed hopper for extruders - with hollow feed screw contg a movable piston |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2056656A1 true DE2056656A1 (en) | 1972-05-25 |
Family
ID=5788431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19702056656 Pending DE2056656A1 (en) | 1970-11-18 | 1970-11-18 | Feed hopper for extruders - with hollow feed screw contg a movable piston |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2056656A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3121428A1 (en) * | 1980-06-02 | 1982-02-04 | Pont-a-Mousson S.A., 54000 Nancy | DEVICE FOR SPRAYING PLASTIC, ELASTOMERIC OR OTHER ANALOG MATERIALS |
DE19501170A1 (en) * | 1995-01-09 | 1996-07-11 | Wolfgang Uhlmann | Feeding and reprocessing of cut film in extruder without prior agglomeration |
-
1970
- 1970-11-18 DE DE19702056656 patent/DE2056656A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3121428A1 (en) * | 1980-06-02 | 1982-02-04 | Pont-a-Mousson S.A., 54000 Nancy | DEVICE FOR SPRAYING PLASTIC, ELASTOMERIC OR OTHER ANALOG MATERIALS |
DE19501170A1 (en) * | 1995-01-09 | 1996-07-11 | Wolfgang Uhlmann | Feeding and reprocessing of cut film in extruder without prior agglomeration |
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