EP2277641A1 - Device for mounting a piston into a cartridge - Google Patents

Device for mounting a piston into a cartridge Download PDF

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Publication number
EP2277641A1
EP2277641A1 EP10169532A EP10169532A EP2277641A1 EP 2277641 A1 EP2277641 A1 EP 2277641A1 EP 10169532 A EP10169532 A EP 10169532A EP 10169532 A EP10169532 A EP 10169532A EP 2277641 A1 EP2277641 A1 EP 2277641A1
Authority
EP
European Patent Office
Prior art keywords
cartridge
piston
spreading
forceps
segments
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
EP10169532A
Other languages
German (de)
French (fr)
Other versions
EP2277641B1 (en
Inventor
Ernst Carniello
Ruedi Walther
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.)
Stebler and Co AG
Original Assignee
Stebler and Co AG
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Filing date
Publication date
Application filed by Stebler and Co AG filed Critical Stebler and Co AG
Publication of EP2277641A1 publication Critical patent/EP2277641A1/en
Application granted granted Critical
Publication of EP2277641B1 publication Critical patent/EP2277641B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material

Definitions

  • the invention relates to a device for inserting a piston in a filled with an auspressbaren mass cartridge with a tubular cartridge body.
  • Cartridges for expressible masses consisting of a tubular body closed at the front end, in which the mass is introduced from the open rear side. After filling, the open backside is closed with a piston and sealed. The piston later serves to squeeze the mass through an opening to be made at the front end of the cartridge.
  • the piston usually consists of a flat or curved end face and a molded cylindrical skirt. He has to fulfill a number of demands. During insertion, the piston must not close tightly so that air trapped in the interior of the cartridge can escape. Once inserted, the piston must prevent the ingress of air and water vapor to make the product storable. Even with increased internal pressure in the cartridge during extrusion, the piston must reliably seal the mass. In addition to sealing requirements, the piston must also run smoothly at all times to the front end of the cartridge.
  • the invention has for its object to find a way to meet with a spreader the various requirements for the closure of cartridges.
  • the device for inserting the piston has a segmented forceps arrangement which completely surrounds the outside of the cartridge and a pressing piston which spreads the skirt of the inserted piston against the cartridge wall held in the forceps arrangement.
  • a cartridge Before a cartridge is provided with a piston, it has been filled in a filling station with a squeezable mass. In the Fig. 1 shown cartridge 1 is filled.
  • a piston may already be inserted loosely. Alternatively, the piston may be located in the device and inserted through it into the cartridge.
  • the device shown consists of two separate parts.
  • a holder 2 holds the front end of the cartridge.
  • a piston spreading device 3 consists of a tong assembly 4, in which the rear end of the cartridge is held, and a Sp Dreckbenan extract 5, which radially spreads the piston in the interior of the cartridge.
  • the forceps assembly 4 is in Fig. 2 shown in detail.
  • a housing 6 there are four pliers segments 7, which together form a closed ring.
  • the segments are provided on their outsides with retaining pins, with which they are held radially movable in the housing.
  • the forceps segments are opened, so that a cartridge can be used.
  • the segments are pushed radially inward until they form a closed ring. This can be done mechanically, pneumatically, hydraulically, etc.
  • the inner diameter of the closed segment ring is dimensioned so that no annular gap remains between it and the outside of the cartridge.
  • the insides of the pliers segments are provided with a profile of circumferential recesses 16.
  • the expansion piston consists of a pressing element 10 that is disposed between an inner compression sleeve 11, which is provided with a flange 12, and an outer compression sleeve 13.
  • the two coaxial with each other press sleeves are axially displaceable by an actuator 14 against each other.
  • the pressing member 10 consists of one or more, in the present example three, elastomeric disks 15 which are separated from each other by disks of a hard material. If the two pressing sleeves are displaced relative to one another by the actuating device 14 in such a way that pressure is exerted on the pressing element, the elastomer discs 15 are compressed axially and thereby enlarge their outer diameter.
  • the piston When inserting the cartridge into the pliers arrangement simultaneously enters the front part of the expansion piston with the pressing element in the opening of the cartridge.
  • the piston may have previously been placed on the pressing element or loosely inserted into the cartridge.
  • the segments When the cartridge is inserted, the segments are closed and then the spreader piston is actuated. Due to the opposite displacement of the two compression sleeves, the elastomer discs of the pressing element are compressed and expanded. As a result, they expand the skirt of the piston and the cartridge wall so far that the latter is pressed into the recesses of the forceps segments.
  • the piston is in an application-adapted recess in the inside of the cartridge. This results in a mechanically secure and tight closure of the cartridge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Endoscopes (AREA)

Abstract

The apparatus has a tubular cartridge body, where a segmented gripper arrangement (4) and a piston are formed for spreading a guided piston against a cartridge wall. The tongs arrangement comprises the outer side of the cartridge (1) in completely accessible manner. The cartridge and the piston are made of metal.

Description

Die Erfindung betrifft eine Vorrichtung zum Einsetzen eines Kolbens in eine mit einer auspressbaren Masse gefüllte Kartusche mit einem rohrförmigen Kartuschenkörper.The invention relates to a device for inserting a piston in a filled with an auspressbaren mass cartridge with a tubular cartridge body.

Kartuschen für auspressbare Massen, wie beispielsweise Dicht- oder Füllmassen, bestehend aus einem am vorderen Ende geschlossenen rohrförmigen Körper, in welchen die Masse von der offenen Rückseite her eingefüllt wird. Nach dem Befüllen wird die offene Rückseite mit einem Kolben verschlossen und abgedichtet. Der Kolben dient später dem Auspressen der Masse durch eine am vorderen Ende der Kartusche herzustellende Öffnung.Cartridges for expressible masses, such as sealing or filling compounds, consisting of a tubular body closed at the front end, in which the mass is introduced from the open rear side. After filling, the open backside is closed with a piston and sealed. The piston later serves to squeeze the mass through an opening to be made at the front end of the cartridge.

Der Kolben besteht üblicherweise aus einer flachen oder gewölbten Stirnfläche und einer angeformten zylindrischen Schürze. Er muss eine Reihe von Forderungen erfüllen. Während des Einsetzens darf der Kolben nicht dicht abschliessen, damit im Innenraum der Kartusche eingeschlossene Luft entweichen kann. Einmal eingesetzt, muss der Kolben das Eindringen von Luft und Wasserdampf verhindern, um das Produkt lagerfähig zu machen. Auch bei erhöhtem Innendruck in der Kartusche während des Auspressens muss der Kolben die Masse zuverlässig abdichten. Nebst dichtungstechnischen Anforderungen muss der Kolben auch jederzeit gleichmässig zum vorderen Ende der Kartusche laufen.The piston usually consists of a flat or curved end face and a molded cylindrical skirt. He has to fulfill a number of demands. During insertion, the piston must not close tightly so that air trapped in the interior of the cartridge can escape. Once inserted, the piston must prevent the ingress of air and water vapor to make the product storable. Even with increased internal pressure in the cartridge during extrusion, the piston must reliably seal the mass. In addition to sealing requirements, the piston must also run smoothly at all times to the front end of the cartridge.

Um allen diesen Anforderungen gerecht zu werden, sind unterschiedliche Formen von Kolben vorgeschlagen worden, die sich meistens durch komplizierte Anordnungen von Dichtlippen und dergleichen auszeichnen.To meet all these requirements, various forms of pistons have been proposed, which are usually characterized by complicated arrangements of sealing lips and the like.

Für Kartuschen aus Metall wurde auch schon vorgeschlagen, einen einfach geformten Kolben aus Metall nach dem Einbringen und dem Entlüften des Innenraums so aufzuspreizen, dass gleichzeitig die Kartuschenwand geringfügig aufgeweitet wird und der Kolben mit einem aufgrund seiner Materialsteifigkeit bleibenden Druck an der Innenseite der Kartusche anliegt und so die erforderliche Dichtigkeit erreicht wird. Dieser an sich attraktive Vorschlag konnte aber bisher nicht erfolgreich verwirklicht werden, weil bei der Verformung der Kartuschenwand durch das Aufspreizen des Kolbens wegen teils einseitiger Verformungen Undichtigkeit entstand oder beim Ausdrücken negative Auswirkungen auftraten.For metal cartridges has also been proposed to spread open a simply shaped metal piston after insertion and venting of the interior so that at the same time the cartridge wall is slightly widened and the piston rests with a lasting due to its material stiffness pressure on the inside of the cartridge and so the required tightness is achieved. This proposal, which was attractive in itself, could not yet be realized successfully, however, because in the deformation of the cartridge wall due to the spreading of the piston due to partly one-sided deformations leak or occurred when expressing negative effects.

Der Erfindung liegt die Aufgabe zugrunde, eine Möglichkeit zu finden, mit einem Spreizkolben die diversen Anforderungen an den Verschluss von Kartuschen zu erfüllen.The invention has for its object to find a way to meet with a spreader the various requirements for the closure of cartridges.

Erfindungsgemäss wird dies dadurch gelöst, dass die Vorrichtung zum Einsetzen des Kolbens eine die Aussenseite der Kartusche vollumfänglich umfassende, segmentierte Zangenanordnung und einen die Schürze des eingeführten Kolbens gegen die in der Zangenanordnung gehaltene Kartuschenwand spreizenden Presskolben aufweist.According to the invention, this is achieved in that the device for inserting the piston has a segmented forceps arrangement which completely surrounds the outside of the cartridge and a pressing piston which spreads the skirt of the inserted piston against the cartridge wall held in the forceps arrangement.

Im Folgenden wird unter Bezugnahme auf die beiliegende Zeichnung ein bevorzugtes Ausführungsbeispiel der Erfindung beschrieben. Es zeigen

Fig. 1
eine perspektivische Darstellung einer Vor- richtung zum Einsetzen eines Kolbens in eine Kartusche
Fig. 2
eine aufgeschnittene Darstellung einer Kar- tuschenhalterung
Fig. 3
eine aufgeschnittene Darstellung eines Spreizkolbens
Hereinafter, a preferred embodiment of the invention will be described with reference to the accompanying drawings. Show it
Fig. 1
a perspective view of an apparatus for inserting a piston in a cartridge
Fig. 2
a cutaway view of a cartridge holder
Fig. 3
a cutaway view of an expansion piston

Bevor eine Kartusche mit einem Kolben versehen wird, ist sie in einer Füllstation mit einer auspressbaren Masse gefüllt worden. Die in Fig. 1 gezeigte Kartusche 1 ist gefüllt. Ausserdem kann ein Kolben bereits lose eingelegt sein. Alternativ kann sich der Kolben auch in der Vorrichtung befinden und durch diese in die Kartusche eingeführt werden.Before a cartridge is provided with a piston, it has been filled in a filling station with a squeezable mass. In the Fig. 1 shown cartridge 1 is filled. In addition, a piston may already be inserted loosely. Alternatively, the piston may be located in the device and inserted through it into the cartridge.

Die in Fig. 1 gezeigte Vorrichtung besteht aus zwei getrennten Teilen. Eine Halterung 2 hält das vordere Ende der Kartusche. Eine Kolbenspreizeinrichtung 3 besteht aus einer Zangenanordnung 4, in welcher das hintere Ende der Kartusche gehalten wird, und einer Spreizkolbenanordnung 5, welche den Kolben im Inneren der Kartusche radial aufspreizt.In the Fig. 1 The device shown consists of two separate parts. A holder 2 holds the front end of the cartridge. A piston spreading device 3 consists of a tong assembly 4, in which the rear end of the cartridge is held, and a Spreizkolbenanordnung 5, which radially spreads the piston in the interior of the cartridge.

Die Zangenanordnung 4 ist in Fig. 2 im Detail gezeigt. In einem Gehäuse 6 befinden sich vier Zangensegmente 7, die zusammen einen geschlossenen Ring bilden. Anstelle von vier ist auch eine andere Zahl von Segmenten möglich. Die Segmente sind an ihren Aussenseiten mit Haltezapfen versehen, mit denen sie im Gehäuse radial beweglich gehalten sind. In dem in Fig. 2 gezeigten Zustand sind die Zangensegmente geöffnet, so dass eine Kartusche eingesetzt werden kann. Wenn sich das hintere Ende einer Kartusche innerhalb des Segmentrings befindet, werden die Segmente radial nach innen geschoben, bis sie einen geschlossenen Ring bilden. Dies kann mechanisch, pneumatisch, hydraulisch etc. erfolgen.The forceps assembly 4 is in Fig. 2 shown in detail. In a housing 6 there are four pliers segments 7, which together form a closed ring. Instead of four, a different number of segments is possible. The segments are provided on their outsides with retaining pins, with which they are held radially movable in the housing. In the in Fig. 2 As shown, the forceps segments are opened, so that a cartridge can be used. When the rear end of a cartridge is within the segment ring, the segments are pushed radially inward until they form a closed ring. This can be done mechanically, pneumatically, hydraulically, etc.

Der Innendurchmesser des geschlossenen Segmentrings ist so bemessen, dass zwischen ihm und der Aussenseite der Kartusche kein Ringspalt verbleibt. Die Innenseiten der Zangensegmente sind mit einem Profil aus umlaufenden Vertiefungen 16 versehen.The inner diameter of the closed segment ring is dimensioned so that no annular gap remains between it and the outside of the cartridge. The insides of the pliers segments are provided with a profile of circumferential recesses 16.

Ins Innere der Zangenanordnung erstreckt sich der vordere Teil des in Fig. 3 gezeigten Spreizkolbens 9. Der Spreizkolben besteht aus einem Presselement 10, dass zwischen einer inneren Presshülse 11, die mit einem Flansch 12 versehen ist, und einer äusseren Presshülse 13 angeordnet ist. Die beiden koaxial ineinander befindlichen Presshülsen sind durch eine Betätigungsvorrichtung 14 axial gegeneinander verschiebbar.Inside the pliers assembly extends the front part of in Fig. 3 The expansion piston consists of a pressing element 10 that is disposed between an inner compression sleeve 11, which is provided with a flange 12, and an outer compression sleeve 13. The two coaxial with each other press sleeves are axially displaceable by an actuator 14 against each other.

Das Presselement 10 besteht aus einem oder mehreren, im vorliegenden Beispiel drei, Elastomerscheiben 15, die voneinander durch Scheiben aus einem harten Material getrennt sind. Wenn durch die Betätigungsvorrichtung 14 die beiden Presshülsen so gegeneinander verschoben werden, dass Druck auf das Presselement ausgeübt wird, werden die Elastomerscheiben 15 axial zusammengedrückt und erweitern dadurch ihren Aussendurchmesser.The pressing member 10 consists of one or more, in the present example three, elastomeric disks 15 which are separated from each other by disks of a hard material. If the two pressing sleeves are displaced relative to one another by the actuating device 14 in such a way that pressure is exerted on the pressing element, the elastomer discs 15 are compressed axially and thereby enlarge their outer diameter.

Beim Einschieben der Kartusche in die Zangenanordnung gelangt gleichzeitig der vordere Teil des Spreizkolbens mit dem Presselement in die Öffnung der Kartusche. Der Kolben kann zuvor auf das Presselement aufgesetzt oder lose in die Kartusche eingelegt worden sein. Wenn die Kartusche eingeführt ist, werden die Segmente geschlossen und danach der Spreizkolben betätigt. Durch die gegenläufige Verschiebung der beiden Presshülsen werden die Elastomerscheiben des Presselements zusammengedrückt und aufgeweitet. Dadurch weiten sie die Schürze des Kolbens und die Kartuschenwand so weit auf, dass letztere in die Vertiefungen der Zangensegmente gepresst wird.When inserting the cartridge into the pliers arrangement simultaneously enters the front part of the expansion piston with the pressing element in the opening of the cartridge. The piston may have previously been placed on the pressing element or loosely inserted into the cartridge. When the cartridge is inserted, the segments are closed and then the spreader piston is actuated. Due to the opposite displacement of the two compression sleeves, the elastomer discs of the pressing element are compressed and expanded. As a result, they expand the skirt of the piston and the cartridge wall so far that the latter is pressed into the recesses of the forceps segments.

Nach dieser Verformung befindet sich der Kolben in einer der Anwendung angepassten Vertiefung in der Innenseite der Kartusche. Dies ergibt einen mechanisch sicheren und dichten Verschluss der Kartusche.After this deformation, the piston is in an application-adapted recess in the inside of the cartridge. This results in a mechanically secure and tight closure of the cartridge.

Claims (3)

Vorrichtung zum Einsetzen eines Kolbens in eine mit einer auspressbaren Masse gefüllte Kartusche mit einem rohrförmigen Kartuschenkörper gekennzeichnet durch eine die Aussenseite der Kartusche vollumfänglich umfassende, segmentierte Zangenanordnung und einen die Schürze des eingeführten Kolbens gegen die in der Zangenanordnung gehaltene Kartuschenwand spreizenden Presskolben.Device for inserting a piston into a cartridge filled with an extrudable mass with a tubular cartridge body characterized by a segmented forceps assembly which completely surrounds the outside of the cartridge and a plunger which spreads the skirt of the inserted piston against the cartridge wall held in the forceps arrangement. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Kartusche und der Kolben aus Metall bestehen.Apparatus according to claim 1, characterized in that the cartridge and the piston are made of metal. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Innendurchmesser der geschlossenen Zangenanordnung gleich ist wie der Aussendurchmesser der unbefüllten Kartusche, um beim Aufspreizen der Kolbenschürze eine gleichmässige Aufweitung der Kartuschenwand in die Vertiefung der Zangensegmente zuzulassen.Apparatus according to claim 1, characterized in that the inner diameter of the closed tong assembly is equal to the outer diameter of the unfilled cartridge to allow a spreading of the cartridge wall in the recess of the tong segments when spreading the piston skirt.
EP10169532A 2009-07-14 2010-07-14 Device for mounting a piston into a cartridge Not-in-force EP2277641B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01092/09A CH701453A1 (en) 2009-07-14 2009-07-14 An apparatus for inserting a piston into a cartridge.

Publications (2)

Publication Number Publication Date
EP2277641A1 true EP2277641A1 (en) 2011-01-26
EP2277641B1 EP2277641B1 (en) 2012-03-28

Family

ID=41667302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10169532A Not-in-force EP2277641B1 (en) 2009-07-14 2010-07-14 Device for mounting a piston into a cartridge

Country Status (4)

Country Link
EP (1) EP2277641B1 (en)
AT (1) ATE551132T1 (en)
CH (1) CH701453A1 (en)
ES (1) ES2385198T3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB131673A (en) * 1900-01-01
US4567631A (en) * 1981-04-20 1986-02-04 Haskel, Inc. Method for installing tubes in tube sheets
DE29820879U1 (en) * 1998-11-23 1999-02-04 Leistritz AG, 90459 Nürnberg Forming tool for thin-walled metal pipes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB131673A (en) * 1900-01-01
US4567631A (en) * 1981-04-20 1986-02-04 Haskel, Inc. Method for installing tubes in tube sheets
DE29820879U1 (en) * 1998-11-23 1999-02-04 Leistritz AG, 90459 Nürnberg Forming tool for thin-walled metal pipes

Also Published As

Publication number Publication date
ES2385198T3 (en) 2012-07-19
EP2277641B1 (en) 2012-03-28
CH701453A1 (en) 2011-01-14
ATE551132T1 (en) 2012-04-15

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