DE4219784C1 - Ultrasonic-welding device with pipe-shaped base - has corrugated bearing area formed by external surface of helical spring with closely placed windings fixed in position by pins at housing - Google Patents

Ultrasonic-welding device with pipe-shaped base - has corrugated bearing area formed by external surface of helical spring with closely placed windings fixed in position by pins at housing

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Publication number
DE4219784C1
DE4219784C1 DE19924219784 DE4219784A DE4219784C1 DE 4219784 C1 DE4219784 C1 DE 4219784C1 DE 19924219784 DE19924219784 DE 19924219784 DE 4219784 A DE4219784 A DE 4219784A DE 4219784 C1 DE4219784 C1 DE 4219784C1
Authority
DE
Germany
Prior art keywords
housing
helical spring
ultrasonic
welding device
bearing area
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.)
Expired - Fee Related
Application number
DE19924219784
Other languages
German (de)
Inventor
Gottfried 3380 Goslar De Heinen
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.)
Maschinenfabrik Knaup & Co 3320 Salzgitter De GmbH
Original Assignee
Maschinenfabrik Knaup & Co 3320 Salzgitter De GmbH
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 Maschinenfabrik Knaup & Co 3320 Salzgitter De GmbH filed Critical Maschinenfabrik Knaup & Co 3320 Salzgitter De GmbH
Priority to DE19924219784 priority Critical patent/DE4219784C1/en
Priority to DE9305717U priority patent/DE9305717U1/en
Application granted granted Critical
Publication of DE4219784C1 publication Critical patent/DE4219784C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81453—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being made of flexible slats, flexible fins, flexible bristles or springs, e.g. coiled springs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The ultrasonic-welding device has a support (1) and a pipe-shaped base (2) consisting of a large number of elements placed side by side. Its bearing area is formed by the external surface of a helical spring (5) which is mounted inside the housing (3) and fixed in position at both ends by pins (6). The helical spring (5) is a tensile spring with windings placed closely side by side in the unstretched position forming a corrugated surface. It is made of a round cross-sectional wire. USE/ADVANTAGE - Ultrasonic welding device. The helical spring forming the bearing area is cheap, easy to mount and change.

Description

Die Erfindung betrifft eine Vorrichtung für eine Ultraschall- Verschweißung mit einer Sonotrode und einem Amboß, dessen Anlagefläche aus einer Vielzahl von nebeneinander angeordneten Elementen gebildet ist.The invention relates to a device for an ultrasound Welding with a sonotrode and an anvil, the Contact surface made up of a multitude of arranged side by side Elements is formed.

Für die Ultraschall-Verschweißung, beispielsweise von mit verschweißbarem Material beschichteten Papiersäcken, ist es bekannt, eine Sonotrode als Ultraschallquelle zu verwenden, die mit einem relativ massiven Amboß zusammenwirkt. Die miteinander zu verschweißenden Materialien werden zwischen Sonotrode und Amboß aufeinander gepreßt. Durch die Anwendung des Ultraschalls wird das verschweißbare Material plastifiziert, so daß die Materialien der aufeinanderliegenden Lagen verschweißt werden.For ultrasonic welding, for example with weldable material coated paper bags, it is known to use a sonotrode as an ultrasound source, that works with a relatively massive anvil. The Materials to be welded together are between Sonotrode and anvil pressed together. Through the application ultrasound becomes the weldable material plasticized so that the materials of the superimposed Layers are welded.

Aus der US 44 44 814 ist es bekannt, den Amboß aus einer Vielzahl von in einem Amboßgehäuse nebeneinander angeordneten Elementen auszubilden, die gemeinsam die Anlagefläche bilden. Die flächigen Elemente sind dabei mit einem elastischen Fuß ausgebildet, um durch den zu verschweißenden Gegenstand ent­ stehende Unebenheiten auszugleichen und auch bei den Uneben­ heiten eine sichere Verschweißung zu ermöglichen. From US 44 44 814 it is known the anvil from a Variety of juxtaposed in an anvil housing Form elements that together form the contact surface. The flat elements are with an elastic foot trained to ent by the object to be welded to compensate for standing bumps and also for the bumps units to enable secure welding.  

Nachteilig an einem derartigen bekannten Amboß ist, daß eine große Anzahl von flächigen Elementen für die Montage des Amboß gehandhabt werden müssen. Dies ist besonders nachteilig im Servicefall, wenn flächige Elemente defekt oder abgenutzt sind und ausgetauscht werden müssen.A disadvantage of such a known anvil is that a large number of flat elements for mounting the anvil have to be handled. This is particularly disadvantageous in Service case when flat elements are defective or worn and need to be replaced.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, eine Vorrichtung der eingangs erwähnten Art so auszubilden, daß eine einfachere Montage des Ambosses gewährleistet ist.The invention is based on the object, a Form device of the type mentioned in such a way that easier assembly of the anvil is guaranteed.

Diese Aufgabe wird bei einer Vorrichtung der eingangs erwähnten Art dadurch gelöst, daß die Anlagefläche die Außenfläche einer Spiralfeder ist.This task is the beginning of a device mentioned type solved in that the contact surface Outside surface of a coil spring is.

Durch den Einsatz einer Spiralfeder als Anlagefläche des Ambosses wird eine Vielzahl von nebeneinander angeordneten Elementen durch die Windungen der Spiralfeder realisiert, die eine gewisse Elastizität aufweisen können, dabei aber zusammenhängen, so daß die Vielzahl der nebeneinander ange­ ordneten Elemente immer einheitlich gehandhabt werden kann. Die Spiralfeder muß lediglich in das Gehäuse des Amboß ein­ gesetzt und gegebenenfalls wieder entnommen werden. Dies ist eine äußerst einfacher Vorgang, der wenig Zeit benötigt, so daß im Servicefall der Amboß durch Austausch der Spiralfeder sofort wieder funktionsfähig gemacht werden kann.By using a spiral spring as the contact surface of the Anvils are arranged in a multitude of side by side Elements realized by the turns of the spiral spring, the can have a certain elasticity, but at the same time related, so that the multitude of side by side ordered elements can always be handled consistently. The coil spring only has to be inserted into the anvil housing set and removed if necessary. This is an extremely simple process that takes little time, so that when servicing the anvil by replacing the coil spring can be made operational again immediately.

Außerordentlich zweckmäßig ist, wenn die Spiralfeder eine Zugfeder ist, deren Windungen im Ruhezustand dicht an dicht aneinander liegen. Dadurch wird ohne externe Vorspannung eine geschlossene Außenfläche der Spiralfeder sichergestellt.It is extremely useful if the coil spring is a Tension spring is, whose turns close together at rest lie together. As a result, a closed outer surface of the coil spring ensured.

Bei den bekannten Ambossen waren die nebeneinander liegenden Kanten der flächigen Elemente, die gemeinsam die Anlagefläche bildeten, eben ausgeführt, so daß sich eine durchgehende ebene Anlagefläche ergab. In einer bevorzugten Ausführungsform der vorliegenden Erfindung bilden die Windungen der Spiralfeder demgegenüber eine wellige Oberfläche, beispielsweise indem die Spiralfeder aus einem Draht mit rundem Querschnitt gebildet ist. Versuche haben ergeben, daß trotz der welligen Oberfläche eine zuverlässige Verschweißung möglich ist und daß die wellige Oberfläche sogar Vorteile bei der Verschweißung bieten kann, weil bei der Ultraschall-Verschweißung störendes Material durch den Ultraschall in die Wellentäler der welligen Oberfläche transportiert wird und durch die von den Wellen­ bergen ausgehende Plastifizierung des Materials in den Wellen­ tälern etwas unterhalb der eigentlichen Verschweißungsebene eingeschweißt wird. Gerade bei der Verschweißung von gefüllten Säcken, insbesondere (im Verschweißungsbereich mit einer geeigneten Schweißschicht versehenen) Papiersäcken entsteht durch die wellige Oberfläche eher ein Vorteil als ein Nachteil.In the well-known anvils were the side by side Edges of flat elements that together make up the contact surface formed, just executed, so that there is a continuous level Investment area revealed. In a preferred embodiment of the The present invention form the coils of the coil spring  in contrast, a wavy surface, for example by the Coil spring formed from a wire with a round cross-section is. Tests have shown that despite the wavy surface reliable welding is possible and that wavy surface even offer advantages in welding can, because disturbing in the ultrasonic welding Material through the ultrasound into the undulating valleys Surface is transported and by the waves hide outgoing plasticization of the material in the waves valleys a little below the actual welding level is welded in. Especially when welding filled Bags, especially (in the welding area with a suitable welding layer) paper bags more of an advantage than a through the wavy surface Disadvantage.

Die erfindungsgemäße Verwendung einer Spiralfeder erlaubt es, einen Amboß für eine erfindungsgemäße Vorrichtung außerordent­ lich preiswert herzustellen, da herkömmliche Zugfedern verwendet werden können und nicht die Präzisionsfertigung einer Vielzahl von flächigen Elementen für den Amboß mit deren präziser Verbindung untereinander im Amboßgehäuse erforderlich ist. The use of a spiral spring according to the invention allows an anvil for an inventive device extraordinary Lich inexpensive to manufacture, because conventional tension springs can be used and not precision manufacturing a variety of flat elements for the anvil with their precise connection with each other in the anvil housing required is.  

Die Erfindung soll im folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden. Es zeigen:The invention is based on one in the drawing illustrated embodiment are explained in more detail. It demonstrate:

Fig. 1 eine teilweise geschnittene Seitenansicht eines Ambosses, Fig. 1 is a partially sectioned side view of an anvil,

Fig. 2 einen Vertikalschnitt entlang der Line A-B in Fig. 1. FIG. 2 shows a vertical section along line AB in FIG. 1.

Fig. 1 läßt eine rohrförmige Halterung 1 erkennen, an der ein Amboß 2 befestigt ist. Der Amboß 2 besteht aus einem an der rohrförnigen Halterung 1 einseitig befestigten ebenfalls rohrförmigen Gehäuse 3, das über nahezu seine gesamte Länge an seiner Oberseite abgeschnitten ist und so zur Oberseite hin ein Fenster 4 bildet. Durch das Fenster 4 wird die Oberseite einer in das Gehäuse 3 eingesetzten Spiralfeder 5 erreichbar, deren Oberseite über die Höhe des Gehäuses 3 im Bereich der Fenster 4 hinausragt. Die Spiralfeder ist an beiden Enden im Gehäuse 3 mit durch das Gehäuse mittig hindurchtretenden Sicherungsstiften 6 in seiner Lage fixiert. Fig. 1 shows a tubular holder 1 to which an anvil 2 is attached. The anvil 2 consists of a tubular housing 3 which is also fastened on one side to the tubular holder 1 and is cut off over almost its entire length on its upper side and thus forms a window 4 towards the upper side. Through the window 4 the top of a spiral spring 5 inserted into the housing 3 can be reached, the top of which projects beyond the height of the housing 3 in the region of the window 4 . The coil spring is fixed in position at both ends in the housing 3 with locking pins 6 passing through the center of the housing.

Wie Fig. 1 erkennen läßt, ist die Spiralfeder 5 aus einem Draht mit rundem Querschnitt gewickelt, so daß die obere Außenfläche der Spiralfeder 5, die die Anlagefläche für den zu verschweißenden Gegenstand und die Sonotrode bildet, aufgrund der im Querschnitt runden Windungen wellig ausgebildet ist.As can be seen in Fig. 1, the coil spring 5 is wound from a wire with a round cross section, so that the upper outer surface of the coil spring 5 , which forms the contact surface for the object to be welded and the sonotrode, is wavy due to the round cross sections .

Obwohl die wellige Ausbildung der Anlagefläche durchaus Vorteile bietet, ist es ohne weiteres möglich, die Spiral­ feder 5 auch aus einem Draht mit einem rechteckigen Quer­ schnitt zu wickeln, um eine nichtwellige, ebene Anlagefläche auszubilden. Although the wavy design of the contact surface offers advantages, it is easily possible to wrap the spiral spring 5 also from a wire with a rectangular cross-section to form a non-corrugated, flat contact surface.

Die Zeichnung läßt erkennen, daß das Auswechseln der Spiralfeder 5 ohne Schwierigkeiten möglich ist. Das Auswechseln kann beispielsweise dadurch erfolgen, daß ein Sicherungsstift 6 entfernt und die Spiralfeder 5 axial aus dem Gehäuse 3 herausgezogen wird. In diesem Fall kann sich das Gehäuse im Bereich der Fenster 4 so hoch erstrecken, daß ein Herausfallen der Spiralfeder 5 aus dem Gehäuse 3 nicht möglich ist. In diesem Fall kann der Amboß auch mit der Anlagefläche der Spiralfeder 5 nach unten in Benutzung genommen werden, wenn eine Sonotrode unterhalb des Ambosses 2 gegen diesen verfahren wird.The drawing shows that the exchange of the coil spring 5 is possible without difficulty. The replacement can be done, for example, by removing a locking pin 6 and pulling the coil spring 5 axially out of the housing 3 . In this case, the housing can extend so high in the area of the windows 4 that the spiral spring 5 cannot fall out of the housing 3 . In this case, the anvil can also be used with the contact surface of the spiral spring 5 facing downward if a sonotrode is moved against the anvil 2 against it.

In jedem Fall stellt die Spiralfeder 5 ein preiswertes und leicht zu handhabendes Element dar, das leicht montiert und ausgewechselt werden kann.In any case, the coil spring 5 is an inexpensive and easy-to-use element that can be easily assembled and replaced.

Claims (4)

1. Vorrichtung für eine Ultraschall-Verschweißung mit einer Sonotrode und einem Amboß (2), dessen Anlagefläche aus einer Vielzahl von nebeneinander angeordneten Elementen gebildet ist, dadurch gekennzeichnet, daß die Anlage­ fläche die Außenfläche einer Spiralfeder (5) ist.1. An apparatus for ultrasonic welding with a sonotrode and an anvil ( 2 ), whose contact surface is formed from a plurality of elements arranged side by side, characterized in that the contact surface is the outer surface of a coil spring ( 5 ). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Spiralfeder (5) eine Zugfeder ist, deren Windungen im Ruhezustand dicht an dicht aneinander liegen.2. Apparatus according to claim 1, characterized in that the spiral spring ( 5 ) is a tension spring, the turns of which lie close together in the rest state. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Windungen der Spiralfeder (5) eine wellige Oberfläche bilden.3. Apparatus according to claim 1 or 2, characterized in that the turns of the coil spring ( 5 ) form a wavy surface. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Spiralfeder (5) aus einem Draht mit rundem Querschnitt gebildet ist.4. The device according to claim 3, characterized in that the spiral spring ( 5 ) is formed from a wire with a round cross section.
DE19924219784 1992-06-17 1992-06-17 Ultrasonic-welding device with pipe-shaped base - has corrugated bearing area formed by external surface of helical spring with closely placed windings fixed in position by pins at housing Expired - Fee Related DE4219784C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19924219784 DE4219784C1 (en) 1992-06-17 1992-06-17 Ultrasonic-welding device with pipe-shaped base - has corrugated bearing area formed by external surface of helical spring with closely placed windings fixed in position by pins at housing
DE9305717U DE9305717U1 (en) 1992-06-17 1993-04-16 Device for ultrasonic welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924219784 DE4219784C1 (en) 1992-06-17 1992-06-17 Ultrasonic-welding device with pipe-shaped base - has corrugated bearing area formed by external surface of helical spring with closely placed windings fixed in position by pins at housing

Publications (1)

Publication Number Publication Date
DE4219784C1 true DE4219784C1 (en) 1993-07-15

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DE19924219784 Expired - Fee Related DE4219784C1 (en) 1992-06-17 1992-06-17 Ultrasonic-welding device with pipe-shaped base - has corrugated bearing area formed by external surface of helical spring with closely placed windings fixed in position by pins at housing
DE9305717U Expired - Lifetime DE9305717U1 (en) 1992-06-17 1993-04-16 Device for ultrasonic welding

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DE9305717U Expired - Lifetime DE9305717U1 (en) 1992-06-17 1993-04-16 Device for ultrasonic welding

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10356431A1 (en) * 2003-11-29 2005-06-30 Herrmann Ultraschalltechnik Gmbh & Co. Kg Device for welding multilayer laminates
FR2886573A1 (en) * 2005-06-06 2006-12-08 Patrick Aubert Butt welding electrode for high frequency welding machine, has metallic wire winding helically wound on core, and coiling fillets, in rectilinear support on material to be welded, independently engaged when pressure is excreted on core

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213997A1 (en) * 1982-04-16 1983-10-20 Behn Maschinenfabrik GmbH & Co KG, 4150 Krefeld Welding device for closing a valve tube of a valve bag
DE3213998A1 (en) * 1982-04-16 1983-10-27 Behn Maschinenfabrik GmbH & Co KG, 4150 Krefeld Device for closing a plastic-foil pouch or bag or a plastic-foil valve tube of a valve bag
US4444614A (en) * 1981-11-02 1984-04-24 Sig-Schweizerische Industrie-Gesellschaft Ultrasonic welding device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4444614A (en) * 1981-11-02 1984-04-24 Sig-Schweizerische Industrie-Gesellschaft Ultrasonic welding device
DE3213997A1 (en) * 1982-04-16 1983-10-20 Behn Maschinenfabrik GmbH & Co KG, 4150 Krefeld Welding device for closing a valve tube of a valve bag
DE3213998A1 (en) * 1982-04-16 1983-10-27 Behn Maschinenfabrik GmbH & Co KG, 4150 Krefeld Device for closing a plastic-foil pouch or bag or a plastic-foil valve tube of a valve bag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10356431A1 (en) * 2003-11-29 2005-06-30 Herrmann Ultraschalltechnik Gmbh & Co. Kg Device for welding multilayer laminates
FR2886573A1 (en) * 2005-06-06 2006-12-08 Patrick Aubert Butt welding electrode for high frequency welding machine, has metallic wire winding helically wound on core, and coiling fillets, in rectilinear support on material to be welded, independently engaged when pressure is excreted on core

Also Published As

Publication number Publication date
DE9305717U1 (en) 1993-06-09

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