DE2826116A1 - Ultrasonically welding collapsible tube - using depressed sonotrode to hold cap and turn tube end radially inwards for good appearance - Google Patents

Ultrasonically welding collapsible tube - using depressed sonotrode to hold cap and turn tube end radially inwards for good appearance

Info

Publication number
DE2826116A1
DE2826116A1 DE19782826116 DE2826116A DE2826116A1 DE 2826116 A1 DE2826116 A1 DE 2826116A1 DE 19782826116 DE19782826116 DE 19782826116 DE 2826116 A DE2826116 A DE 2826116A DE 2826116 A1 DE2826116 A1 DE 2826116A1
Authority
DE
Germany
Prior art keywords
sonotrode
container
cavity
cover part
cover
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Withdrawn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
DE19782826116
Other languages
German (de)
Inventor
Georg Ing Prilhofer
Wolfgang Ing Pulitzer
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.)
Telephon und Telegraphen Fabriks AG Kapsch und Soehne
Original Assignee
Telephon und Telegraphen Fabriks AG Kapsch und Soehne
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 Telephon und Telegraphen Fabriks AG Kapsch und Soehne filed Critical Telephon und Telegraphen Fabriks AG Kapsch und Soehne
Publication of DE2826116A1 publication Critical patent/DE2826116A1/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Withdrawn legal-status Critical Current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
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one of the parts to be joined
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/8141—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—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 surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics

Landscapes

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

Abstract

The thermoplastic body of a container is ultraonsically bonded to a thermoplastic base or cover at its end, using a sonotrode which both vibrates and also moves along the axis of the container and has an end recess to take the base or cover. The end of the body also fits closely into this recess in which base/cover is placed first, the vibrating sonotrode is moved to the end of the body, that end is turned inwards between the base/cover and a supporting surface inside the body, finally the overlap formed with base/cover is ultansonically welded. Simple method, producing aesthetically good appearance as no fused polymer flows out to spoil it nor inwards to reduce the effective capacity, suitable for capping collapsible tubes.

Description

Verfahren und Einrichtung zum dichten Verbinden einesMethod and device for sealingly connecting a

Behältermantels aus thermoplastischem Kunststoff mit einem Boden- oder Deckelteil aus thermoplastischem Kunststoff mittels Ultraschall Die Erfindung betrifft ein Verfahren zum dichten Verbinden eines Behältermantels aus thermoplastischem Kunststoff mit einem Boden- oder Deckelteil aus thermoplastischem Kunststoff mittels Ultraschall, bei dem eine Schweißverbindung zwischen einem Bördelrand des Behältermantels und dem Boden- oder Deckelteil unter Verwendung einer als kombiniertes Bördel- und Schweißwerkzeug wirkenden, in Richtung der Behälterachse schwingenden und bewegbaren Sonotrode hergestellt wird, welche an ihrem stirnseitigen Ende einen den Boden-oder Deckelteil und den Endteil des Behälters aufnehmenden Hohlraum aufweist. Ferner betrifft die Erfindung eine Einrichtung zur Durchführung des erfindungsgemäßen Verfahrens.Container jacket made of thermoplastic with a bottom or lid part made of thermoplastic material by means of ultrasound. The invention relates to a method for sealingly connecting a thermoplastic container jacket Plastic with a base or cover part made of thermoplastic material by means of Ultrasound, in which a welded connection is made between a flanged edge of the container jacket and the bottom or cover part using a combined flange and Welding tool acting, oscillating and movable in the direction of the container axis Sonotrode is produced, which at its front end has a floor or Has lid part and the end part of the container receiving cavity. Further the invention relates to a device for carrying out the method according to the invention.

Ein Verfahren der einleitend angegebenen Gattung ist in der OE-PS 326.343 der Anmelderin beschrieben. Bei diesem bekannten Verfahren wird der Boden- oder Deckelteil in den offenen Endteil des Behältermantels eingeschoben, bis der Rand des Mantels über den Boden- bzw.A method of the genre specified in the introduction is in the OE-PS 326,343 by the applicant. at this known process the bottom or cover part is pushed into the open end part of the container jacket, until the edge of the jacket rises above the floor or

Deckelteil vorsteht, worauf die Sonotrode auf diesen Endteil des Behältermantels aufgeschoben wird, wobei der überstehende Rand des Behältermantels bis zur Auflage am Boden- bzw. Deckelteil einwärts gebördelt und anschließend mittels Ultraschall mit diesem verschweißt wird.Cover part protrudes, whereupon the sonotrode on this end part of the container jacket is pushed on, with the protruding edge of the container jacket up to the support crimped inwards on the bottom or cover part and then using ultrasound is welded to this.

Bei dieser Verfahrensweise wird in den Endprodukten der Boden- oder Deckelteil von dem einwärts gebördelten Rand des Behältermantels überlappt und der Außenrand der Schweiß zone liegt an der Sichtseite des Boden- oder Deckelteiles frei, so daß, wenn beim Schweißvorgang nicht besondere Maßnahmen zur Abdichtung zwischen der Sichtfläche des Boden- oder Deckelteiles und der auf diese einwirkenden Sonotrode getroffen werden, das Aussehen dieser Sichtfläche durch ungeregelten Austritt von geschmolzenem Kunststoff aus der Schweißzone beeinträchtigt werden kann. überdies muß bei dieser Verfahrensweise die Länge jedes Behältermantels bzw. des beim Schweißvorgang über den Boden- bzw. Deckelteil überstehenden Randteiles desselben immer genau auf Maß gehalten werden, wenn alle Endprodukte gleiches Aussehen haben sollen, d.h. wenn die Breite des freiliegenden, einwärts gebördelten Randes des Behältermantels bei allen Endprodukten gleich sein soll.With this procedure, the soil or Lid part of the inwardly beaded edge of the container jacket and the The outer edge of the welding zone is on the visible side of the base or cover part free, so that if no special sealing measures are taken during the welding process between the visible surface of the base or cover part and the one acting on it Sonotrode are hit, the appearance of this visible surface by uncontrolled exit can be affected by molten plastic from the weld zone. moreover With this procedure, the length of each container jacket or the length of the welding process must The edge part of the same projecting over the base or cover part always exactly Be kept to measure if all end products are to have the same appearance, i.e. if the width of the exposed, inwardly curled edge of the container shell should be the same for all end products.

Erfindungsgemäß wird im Rahmen eines Verfahrens der einleitend angegebenen Gattung ein gutes und einheitliches Aussehen der Sichtseite des Deckel- oder Bodenteiles am Endprodukt auf einfache Weise dadurch erreicht, daß unter Verwendung einer Sonotrode, in deren Hohlraum der Deckel- oder Bodenteil sowie der Endteil des Behältermantels mit geringem Bewegungsspiel hineinpassen, zuerst der Boden- oder Deckelteil in den Hohlraum der Sonotrode eingeführt wird und sodann die Sonotrode auf den Endteil des Behältermantels aufgeschoben wird, worauf mittels der gegebenenfalls bereits schwingenden Sonotrode der freie Rand des Behältermantels zwischen dem Deckel- oder Bodenteil und einer innerhalb des Behältermantels angeordneten Widerlagerfläche einwärts umgebördelt und anschließend durch Ultraschalleinwirkung mit dem Boden- oder Deckelteil überlappt verschweißt wird.According to the invention, in the context of a method, that is stated in the introduction Genus a good and uniform appearance of the visible side of the lid or bottom part achieved in a simple manner on the end product by using a sonotrode, in their cavity the top or bottom part and the end part of the Into the container jacket with little room for movement, first the bottom or Cover part is inserted into the cavity of the sonotrode and then the sonotrode is pushed onto the end part of the container jacket, whereupon by means of the possibly already vibrating sonotrode the free edge of the container jacket between the lid or bottom part and an abutment surface arranged within the container jacket beaded inwards and then with the action of ultrasound with the floor or cover part is welded in an overlapping manner.

Da bei dieser Verfahrensweise der Boden- oder Deckelteil den einwärts gebördelten Rand des Behältermantels überlappt, also die Relativlagen dieser Teile gerade umgekehrt wie bei der bekannten Verfahrensweise sind, wird das innere Ende der Schweißzone gegen Sicht abgedeckt und es ist daher an der betreffenden Stirnseite der Endprodukte weder ein Austritt von geschmolzenem Kunststoff noch eine veränderliche Breite des einwärts gebördelten Randes des Behältermantels wahrnehmbar.Since in this procedure the bottom or cover part the inward flanged edge of the container jacket overlaps, so the relative positions of these parts are exactly the opposite of the known procedure, the inner end is the welding zone is covered from sight and it is therefore on the relevant end face of the end products neither a leak of molten plastic nor a changeable one Width of the inwardly beaded edge of the container jacket perceptible.

Der äußere Rand der Schweißzone, der sich an der Mantelfläche der Endprodukte ergibt, liegt einerseits weniger auffällig im Blickfeld als die Stirnseiten derselben und wird anderseits beim Schweißvorgang durch die Sonotrode hinreichend abgedeckt, um einen störenden Austritt von geschmolzenem Kunststoff im wesentlichen zu verhindern.The outer edge of the welding zone, which is located on the outer surface of the End products is on the one hand less noticeable in the field of vision than the front sides same and on the other hand is sufficient during the welding process by the sonotrode covered to a disruptive leakage of molten plastic essentially to prevent.

Eine erfindungsgemäße Einrichtung zur Durchführung des beschriebenen Verfahrens ist mit einer in ihrer Schwingungsrichtung beweglich geführten Sonotrode ausgestattet, die an ihrer Stirnseite einen Hohlraum auf- weist, und dadurch gekennzeichnet, daß zumindest die äußere Ringzone der Endwand dieses Hohlraumes eine der einen Seite des Boden- oder Deckelteiles angepaßte Gestalt und zumindest die äußere Ringzone der entweder von der Endfläche eines Dornes oder von einem in den Behälter einzuschließenden Gegenstand gebildeten Widerlagerfläche eine der äußeren Ringzone der anderen Seite des Boden- oder Deckelteiles angepaßte Gestalt aufweist.A device according to the invention for performing the described The procedure is with a sonotrode that is movably guided in its direction of oscillation equipped, which have a cavity on their front side. knows and characterized in that at least the outer annular zone of the end wall has this Cavity one of one side of the bottom or cover part adapted shape and at least the outer ring zone of either of the end face of a mandrel or of an abutment surface formed in the container to be enclosed object the outer ring zone of the other side of the bottom or cover part adapted shape having.

Es erfolgt dann zwischen der Sonotrode und der Widerlagerfläche eine Verschweißung des Boden- oder Deckelteiles mit dem von ihm überlappten, umgebördelten Rand des Behältermantels über die Gesamtbreite der über lappung, ohne daß an der Sichtseite des Deckel- oder Bodenteiles, d.h. an der Stirnseite des Endproduktes, Spuren dieses Schweißvorganges sichtbar werden.There is then a between the sonotrode and the abutment surface Welding of the base or cover part with the one that is overlapped and beaded Edge of the container jacket over the total width of the overlap without being at the Visible side of the lid or base part, i.e. on the front side of the end product, Traces of this welding process become visible.

Die Erfindung wird nun unter Bezugnahme auf die Zeichnungen näher erläutert.The invention will now be explained in more detail with reference to the drawings explained.

Fig. 1 zeigt im Achsschnitt die wesentlichen Teile einer erfindungsgemäßen Vorrichtung, die beispielsweise für die Tubenherstellung bestimmt ist, samt den durch Schweißung zu verbindenden Werkstücken.Fig. 1 shows in axial section the essential parts of an inventive Device that is intended, for example, for the manufacture of tubes, including the workpieces to be connected by welding.

Die Fig. 2a bis 2d stellen axiale Teilschnitte durch die Sonotrode und das Widerlager der Einrichtung nach Fig. 1 sowie durch die Werkstücke in verschiedenen Arbeitsphasen dar.2a to 2d represent axial partial sections through the sonotrode and the abutment of the device according to FIG. 1 and through the workpieces in different Work phases.

Mit der in Fig. 1 nur schematisch dargestellten erfindungsgemäßen Einrichtung soll z.B. zwecks Fertigung einer Tube ein aus thermoplastischem Kunststoff be- stehender Kappenteil K mit einem ebenfalls aus thermoplastischem Kunststoff bestehenden Mantelteil M durch Schweißung verbunden werden. Die Sonotrode 1 nach Fig.With the only schematically shown in Fig. 1 according to the invention Facility should e.g. for the purpose of manufacturing a tube made of thermoplastic material loading standing cap part K with a also made of thermoplastic Plastic existing shell part M are connected by welding. The sonotrode 1 according to Fig.

1 ist in Richtung ihrer Achse beweglich geführt und in bekannter Weise zu Ultraschallschwingungen in Achsrichtung anregbar. An ihrer Stirnseite weist die Sonotrode einen Hohlraum 2 auf, dessen Endwand in der äußeren Ringzone 3 der Gestalt der Oberseite 0 des Kappenteiles K im beabsichtigten Schweißbereich angepaßt ist.1 is movably guided in the direction of its axis and in a known manner can be excited to ultrasonic vibrations in the axial direction. On its front side, the Sonotrode has a cavity 2, the end wall of which in the outer ring zone 3 of the shape the top 0 of the cap part K is adapted in the intended welding area.

Der Sonotrode steht ein Hohldorn 5 gegenüber, dessen Endfläche 6 als Widerlagerfläche dient und der Gestalt der Unterseite U des Kappenteiles K im beabsichtigten Schweißbereich angepaßt ist. Auf diesen Hohldorn 5 ist der Mantelteil M derart aufgeschoben, daß er über die Widerlagerfläche 6 etwas vorsteht, wie dies mit dem Randteil R angedeutet ist.The sonotrode is a hollow mandrel 5, whose end face 6 as Abutment surface is used and the shape of the underside U of the cap part K in the intended Welding area is adapted. The shell part M is pushed onto this hollow mandrel 5 in such a way that that it protrudes slightly over the abutment surface 6, as indicated by the edge part R. is.

Im Inneren des Hohldornes 5 ist in einer Zwischenwand 7 axial beweglich ein Tragstift 8 geführt, der sich mittels eines Bundes 9 an der Innenwand des Hohldornes abstützt. Eine Schraubenfeder 10, die den Tragstift 8 umgibt und sich mit dem einen Ende an der Zwischenwand 7 und mit dem anderen Ende am Bund 9 abstützt, hat das Bestreben, den Tragstift 8 so weit aus dem Hohldorn 5 herauszuschieben, daß sich der Bund 9 gegen einen ringförmigen Anschlag 11 legt, der am freien Ende des Hohldornes 5 in diesen eingeschraubt ist. Auf das freie vordere Ende dieses Tragstiftes 8 wird der Kappenteil K aufgeschoben.Inside the hollow mandrel 5 is axially movable in an intermediate wall 7 a support pin 8 out, which is by means of a collar 9 on the inner wall of the hollow mandrel supports. A coil spring 10, which surrounds the support pin 8 and with the one End on the partition 7 and the other end on the collar 9, has that Endeavor to push the support pin 8 so far out of the hollow mandrel 5 that the collar 9 places against an annular stop 11 at the free end of the hollow mandrel 5 is screwed into this. On the free front end of this support pin 8 is the cap part K pushed on.

Nach der aus Fig. 1 ersichtlichen Anordnung des Mantelteiles M am Hohldorn 5 und des Kappenteiles K am freien Ende des federnden Tragstiftes 8 wird die Sonotrode in Richtung zu den miteinander zu verschweißenden Werkstücken K und M bewegt, wobei die in den Fig. 2a bis 2d unter Weglassung der federnden Halteeinrichtung für den Kappenteil dargestellten Arbeitsphasen durchlaufen werden.According to the arrangement of the shell part M on, which can be seen from FIG Hollow mandrel 5 and the cap part K on the free End of the resilient support pin 8 the sonotrode is directed towards the workpieces to be welded together K and M moved, the ones shown in FIGS. 2a to 2d with the omission of the resilient holding device work phases shown for the cap part are run through.

Zunächst legt sich gemäß Fig. 2a der Kappenteil K mit seiner Oberseite O an die ringförmige Endfläche 3 des stirnseitigen Hohlraumes der Sonotrode 1 und die Sonotrode 1 nähert sich dem Hohldorn 5, über dessen Endfläche 6 der Rand R des Hüllenmantels M vorsteht.First of all, according to FIG. 2a, the top of the cap part K lies down O to the annular end face 3 of the frontal cavity of the sonotrode 1 and the sonotrode 1 approaches the hollow mandrel 5, over the end face 6 of the edge R of the Shell jacket M protrudes.

Sodann stößt gemäß Fig. 2b der überstehende Rand R des Hüllenmantels M gegen die Unterseite U des Kappenteiles K und wird bei der Weiterbewegung der Sonotrode 1 gemäß Fig. 2c über die Endfläche 6 des Hohldornes 5 gebogen.Then, according to FIG. 2b, the protruding edge R of the casing jacket strikes M against the underside U of the cap part K and is when moving the Sonotrode 1 bent over end face 6 of hollow mandrel 5 according to FIG. 2c.

In der in Fig. 2d gezeigten Endphase liegen die Randzo:1e des Kappenteiles K und der Bördelrand R des Hüllenmantels M zwischen der Endfläche 3 des Hohlraumes der nunmehr eingeschalteten Sonotrode 1 und der Widerlagerfläche 6 des Hohldornes 5 und unter der Wirkung der schwingenden Sonotrode bildet sich eine Schweißnaht S aus, die nach außen von der Sonotrode 1 abgedeckt wird, so daß dort erweichter Kunststoff zumindest nicht in störendem Ausmaß austreten kann. Ein allfälliger Austritt von erweichtem Kunststoff in Richtung des Pfeiles P in Fig. 2d nach innen tritt nicht störend in Erscheinung, weil diese Austrittsstelle durch den Kappenteil K der Sicht entzogen ist. Aus dem gleichen Grund stört es auch nicht, wenn die Länge des umgebördelten Randteiles R des Hüllenmantels bei verschiedenen Endprodukten variiert.In the final phase shown in FIG. 2d, the edge zones 1e of the cap part lie K and the flanged edge R of the casing jacket M between the end face 3 of the cavity the now switched on sonotrode 1 and the abutment surface 6 of the hollow mandrel 5 and under the action of the vibrating sonotrode, a weld seam is formed S from, which is covered to the outside by the sonotrode 1, so that softened there Plastic can at least not escape to a disruptive extent. A possible exit of softened plastic in the direction of arrow P in Fig. 2d occurs inward not disturbing in appearance because this exit point through the cap part K is hidden from view. For the same reason it doesn't matter if the length is too of the beaded edge part R of the casing shell for various end products varies.

Das dargestellte Ausführungsbeispiel kann im Rahmen der Erfindung verschiedentlich abgewandelt werden. So kann beispielsweise statt der dargestellten federnden Halteeinrichtung für den Deckel- oder Bodenteil, der über die Widerlagerfläche eines Dornes vorsteht und am Dorn montiert ist, an der Sonotrode 1 eine Einrichtung zum Festhalten des Boden- oder Deckelteiles in Anlage an der Endfläche 3 ihres stirnseitigen Hohlraumes 2 vorgesehen sein. Am einfachsten kann diese Einrichtung als Saugeinrichtung ausgebildet sein. Zu diesem Zweck kann die Sonotrode, wie in Fig. 1 zusätzlich dargestellt ist, eine zentrale Bohrung 14 aufweisen, die über eine vorzugsweise im Bereich eines Schwingungsknotens der Sonotrode angeordnete Radialbohrung 15 mit einer Saugleitung in Verbindung gesetzt werden kann.The illustrated embodiment can within the scope of the invention be modified variously. For example, instead of the one shown resilient holding device for the cover or base part, which over the abutment surface a mandrel protrudes and is mounted on the mandrel, a device on the sonotrode 1 for holding the bottom or cover part in contact with the end face 3 of its front face Cavity 2 may be provided. The simplest way of doing this is as a suction device be trained. For this purpose, the sonotrode, as shown in FIG. 1, can also be used is, have a central bore 14, which is preferably in the region of a Radial bore 15 arranged at the vibration node of the sonotrode with a suction line can be contacted.

Diese Variante empfiehlt sich insbesondere dann, wenn der aus Kunststoff herzustellende Behälter einen Gegenstand, z.B. ein Primärelement oder einen Blektrolytkondensator, umschließen soll. dieser Gegenstand nimmt dann anstelle des Domes 5 den Hüllenmantel M auf und muß an seinem vorderen Ende eine Widerlagerfläche für die Sonotrode bilden.This variant is particularly recommended when the plastic container to be manufactured an object, e.g. a primary element or a lead-electrolytic capacitor, should enclose. this object then takes the casing jacket instead of the dome 5 M and must form an abutment surface for the sonotrode at its front end.

Der Kappenteil E kann von Hand aus oder mittels eines schwenkbaren mechanischen Zubringers in den stirnseitigen Hohlraum 2 der Sonotrode 1 eingeführt und in diesem durch die Wirkung einer (nicht dargestellten) Saugpumpe in Anlage an der Endfläche 3 testgehalten werden. Die in den Fig. 2a bis 2d dargestellten Arbeitsphasen spielen sich dann in ähnlicher Weise ab, nur daß statt des Hohldornes 6 der mit der Kunststoffhülle zu umschließende Gegenstand tritt.The cap part E can be made by hand or by means of a pivotable mechanical feeder introduced into the frontal cavity 2 of the sonotrode 1 and in this by the action of a suction pump (not shown) in plant be held at the end face 3 test. Those shown in Figs. 2a to 2d Work phases then take place in a similar way, only that instead of the hollow mandrel 6 the object to be enclosed with the plastic sleeve occurs.

Die Widerlagerfläche 6 am feststehenden Dorn 5 oder an dem mit der Kunststoffhülle zu umschließenden Gegenstand ist vorzugsweise zumindest in ihrer äußeren Umfangszone geriffelt, um das Erweichen und Schweißen unter Ultraschalleinwirkung zu begünstigen. Zum gleichen Zweck können an der Unterseite des Boden- oder Deckelteiles in an sich bekannter Weise Bnergie-Richtungsgeber vorgesehen werden. Die Widerlagerfläche 6 und die Unterseite U des Deckel- oder Bodenteiles E sind vorzugsweise konisch ausgebildet, u.zw. unter einem Winkel von weniger als 450The abutment surface 6 on the fixed mandrel 5 or on the one with the Plastic envelope to be enclosed is preferably at least in their outer peripheral zone corrugated for softening and ultrasonic welding to favor. For the same purpose, on the underside of the bottom or cover part Bnergie directional transmitters are provided in a manner known per se. The abutment surface 6 and the underside U of the cover or base part E are preferably conical trained, u.zw. at an angle of less than 450

Claims (5)

A N S P R U C H E Verfahren zum dichten Verbinden eines Behältermantels aus thermoplastischem Kunststoff mit einem Boden- oder Deckelteil aus thermoplastischem Kunststoff mittels Ultraschall, bei dem eine Schweißverbindung zwischen einem Bördelrand des Behältermantels und dem Boden- oder Deckelteil unter Verwendung einer als kombiniertes Bördel- und Schweißwerkzeug wirkenden, in Richtung der Behälterachse schwingenden und bewegbaren Sonotrode hergestellt wird, welche an ihrem stirnseitigen Ende einen den Boden- oder Deckelteil und den Endteil des Behälters aufnehmenden Hohlraum aufweist, dadurch gekennzeichnet, daß unter Verwendung einer Sonotrode, in deren Hohlraum der Deckel- oder Bodenteil sowie der Endteil des Behältermantels mit geringem Bewegungsspiel hineinpassen, zuerst der Boden- oder Deckelteil in den Hohlraum der Sonotrode eingeführt wird und sodann die Sonotrode auf den Endteil des Behältermantels aufgeschoben wird, worauf mittels der gegebenenfalls bereits schwingenden Sonotrode der freie Rand des Behältermantels zwischen dem Deckel- oder Bodenteil und einer innerhalb des Behältermantels angeordneten Wider- lagerfläche einwärts umgebördelt und anschließend durch Ultraschall einwirkung mit dem Boden- oder Deckelteil überlappt verschweißt wird. A N S P R U C H E Method of sealing a container jacket Made of thermoplastic material with a bottom or cover part made of thermoplastic Plastic by means of ultrasound, in which a welded connection between a flange the container shell and the bottom or lid part using one as a combined Flaring and welding tool acting, swinging in the direction of the container axis and movable sonotrode is produced, which at its front end a has the bottom or lid part and the end part of the container receiving cavity, characterized in that using a sonotrode in its cavity the lid or bottom part and the end part of the container jacket with little play fit in, first insert the bottom or cover part into the cavity of the sonotrode and then the sonotrode is pushed onto the end part of the container jacket, whereupon the free edge is created by means of the sonotrode, which may already be vibrating of the container jacket between the lid or bottom part and one within the Container jacket arranged resistance storage area flanged inwards and then overlapped with the bottom or cover part by the action of ultrasound is welded. 2. Einrichtung zur Durchiührung des Verfahrens nach Anspruch 1 mit einer in ihrer Schwingungsrichtung beweglich geführten Sonotrode, die an ihrer Stirnseite einen Hohlraum aufweist, dadurch gekennzeichnet, daß zumindest die äußere Ringzone der Endwand dieses Hohlraumes eine der einen Seite des Boden- oder Deckelteiles angepaßte Gestalt und zumindest die äußere Ringzone der entweder von der Endfläche eines Dornes oder von einem in den Behälter einzuschließenden Gegenstand gebildeten Widerlagerfläche eine der äußeren Ringzone der anderen Seite des Boden- oder Deckelteiles angepaßte Gestalt aufweist.2. Device for performing the method according to claim 1 with a sonotrode movably guided in its direction of oscillation, which is attached to its end face has a cavity, characterized in that at least the outer ring zone the end wall of this cavity on one side of the bottom or cover part adapted shape and at least the outer ring zone of either of the end face a mandrel or formed by an object to be enclosed in the container Abutment surface one of the outer ring zone on the other side of the bottom or cover part Has adapted shape. 3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, daß an der Sonotrode eine Einrichtung zum Festhalten des Boden- oder Deckelteiles in Anlage an der Endfläche des Hohlraumes, vorzugsweise in Form einer Saugeinrichtung, vorgesehen ist.3. Device according to claim 2, characterized in that on the Sonotrode a device for holding the base or cover part in place on the end face of the cavity, preferably in the form of a suction device is. 4. Einrichtung nach Anspruch 2 mit einem die Widerlagerfläche bildenden Dorn, dadurch gekennzeichnet, daß eine über die Widerlagerfläche vorstehende federnde Halteeinrichtung für den Deckel- oder Bodenteil vorgesehen ist.4. Device according to claim 2 with a forming the abutment surface Mandrel, characterized in that a resilient one protruding beyond the abutment surface Holding device for the lid or bottom part is provided. 5. Einrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß zumindest die äußere Umfangszone der Widerlagerfläche geriffelt ist.5. Device according to one of claims 2 to 4, characterized in that that at least the outer peripheral zone of the abutment surface is corrugated.
DE19782826116 1977-07-12 1978-06-14 Ultrasonically welding collapsible tube - using depressed sonotrode to hold cap and turn tube end radially inwards for good appearance Withdrawn DE2826116A1 (en)

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Application Number Priority Date Filing Date Title
AT500377A AT358270B (en) 1977-07-12 1977-07-12 METHOD AND DEVICE FOR SEALINGLY WELDING A CONTAINER COVER MADE OF THERMOPLASTIC PLASTIC WITH A BASE OR LID PART OF THERMOPLASTIC PLASTIC WITH THE AID OF ULTRASONIC

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510469A1 (en) * 1981-07-30 1983-02-04 Boise Cascade Corp METHOD AND APPARATUS FOR END ROTATING WELDING FOR COMPOSITE CONTAINERS AND PRODUCT OBTAINED
EP0146753A1 (en) * 1983-11-18 1985-07-03 BASF Aktiengesellschaft Method and apparatus for fixing structural members in hollow bodies of thermoplastic resins
WO1996025341A1 (en) * 1995-02-13 1996-08-22 The Procter & Gamble Company A collapsible tube package and method of construction
EP0798820A2 (en) * 1996-03-28 1997-10-01 VLM-W. Murjahn GmbH & Co. Base, in particular screw type lamp socket base, manufacturing process of such a base and apparatus for this manufacturing process

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510469A1 (en) * 1981-07-30 1983-02-04 Boise Cascade Corp METHOD AND APPARATUS FOR END ROTATING WELDING FOR COMPOSITE CONTAINERS AND PRODUCT OBTAINED
EP0146753A1 (en) * 1983-11-18 1985-07-03 BASF Aktiengesellschaft Method and apparatus for fixing structural members in hollow bodies of thermoplastic resins
WO1996025341A1 (en) * 1995-02-13 1996-08-22 The Procter & Gamble Company A collapsible tube package and method of construction
US5690764A (en) * 1995-02-13 1997-11-25 The Procter & Gamble Company Collapsible tube package and method of construction
EP0798820A2 (en) * 1996-03-28 1997-10-01 VLM-W. Murjahn GmbH & Co. Base, in particular screw type lamp socket base, manufacturing process of such a base and apparatus for this manufacturing process
EP0798820A3 (en) * 1996-03-28 1998-12-16 VLM-W. Murjahn GmbH & Co. Base, in particular screw type lamp socket base, manufacturing process of such a base and apparatus for this manufacturing process

Also Published As

Publication number Publication date
AT358270B (en) 1980-08-25
ATA500377A (en) 1980-01-15

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