EP0004253B1 - Stackable tube body provided with a layer of dense material, method for producing such a tube body and apparatus for carrying out the method - Google Patents

Stackable tube body provided with a layer of dense material, method for producing such a tube body and apparatus for carrying out the method Download PDF

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Publication number
EP0004253B1
EP0004253B1 EP79810022A EP79810022A EP0004253B1 EP 0004253 B1 EP0004253 B1 EP 0004253B1 EP 79810022 A EP79810022 A EP 79810022A EP 79810022 A EP79810022 A EP 79810022A EP 0004253 B1 EP0004253 B1 EP 0004253B1
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EP
European Patent Office
Prior art keywords
tube
tube body
corrugation
jaws
region
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Expired
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EP79810022A
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German (de)
French (fr)
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EP0004253A2 (en
EP0004253A3 (en
Inventor
Werner Schwarz
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H OBRIST AND CO AG
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H OBRIST AND CO AG
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Priority claimed from CH262178A external-priority patent/CH626302A5/de
Priority claimed from CH144979A external-priority patent/CH634761A5/en
Application filed by H OBRIST AND CO AG filed Critical H OBRIST AND CO AG
Publication of EP0004253A2 publication Critical patent/EP0004253A2/en
Publication of EP0004253A3 publication Critical patent/EP0004253A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/02—Body construction

Definitions

  • the invention relates to a stackable, conical tube body, the open end of which is provided on the inside with a sealant for sealing closure on an annular sealant section.
  • the invention relates to a method for producing such tube bodies and to an apparatus for performing the method.
  • Such stackable tube bodies allow a particularly space-saving and efficient packaging of the tube bodies for shipping to the bottler.
  • the tubes After filling, the tubes are closed at the open end in the area of the sealant layer by folding them together.
  • sealant consists of a wax-like mass. If the sealant layer consists of an adhesive, problems arise when the tube bodies are stacked in that the stacked tubes must not touch the sealant under any circumstances.
  • a conical tube body is already known from German Patent No. 2 009 692, the open end of which has an enlarged section with the same conicity as the tube jacket.
  • the seal ring is applied inside this extended section.
  • the diameter of the enlarged section is selected such that the sealant ring does not come into contact with the next inserted tube.
  • the disadvantage of this configuration is that the tube walls touch directly when stacked one inside the other. As a result, the tubes adhere to one another to such an extent that, on the one hand, it is difficult to separate the tubes and, on the other hand, damage to the already printed tube surface is possible.
  • Another disadvantage of the extended tube end is that when this area is folded together, edges that protrude outward relative to the tube body arise. These sharp-edged projections easily lead to injuries and also look unattractive.
  • the expanded tube section also presents some difficulties in production, since longitudinal cracks can occur at the end of the tube if the necessary expansion is required.
  • the object of the invention is, in particular, to avoid the disadvantages of the known and to create a stackable tube body which is simple to manufacture, with which a gentle stacking of the tube body is made possible and in which a reinforcement of the open tube end is also achieved.
  • the tube body in addition to the sealant section for protecting the sealant when the tubes are stacked, is provided with at least one material deformation directed against the tube axis, and in that the inner diameter in the region of the material deformation is smaller than the inner diameter of the end region adjacent to the material deformation the sealant layer.
  • This inward material deformation protects the immediately adjacent sealant section from contact with the inserted tube body.
  • the material deformation also ensures that the tube walls do not touch directly. This protects the tube surface from damage, prevents the paint coating from sticking together and makes it easier to separate the tubes.
  • the material deformation is arranged between the sealant section and the open tube end. With this arrangement, the sealant section is evidently always protected even with the stacked tubes.
  • the invention can be implemented particularly simply and advantageously if the material deformation is designed as an annular bead.
  • the advantage of this configuration is the reinforcement and stiffening of the entire edge area at the tube opening.
  • the inner diameter can be dimensioned such that there is sufficient space between the tube shells without the bead having to have a radius that is too small.
  • the depth of the bead is chosen so that the material deformation just rises above the layer thickness of the sealant layer. This requirement also applies if the bead does not have a semicircular cross-section.
  • the bead can e.g. also have an approximately trapezoidal cross section. there is no risk of cracking in the bead according to the invention, since if the tube is deformed inwards, it is not stretched but compressed.
  • the material deformation consists of two annular beads which are arranged on both sides of the sealant section.
  • the second bead provides additional protection against external radial loads on the tube casing.
  • Such tube bodies are usually butted in a single operation. It would theoretically be conceivable to also apply the ring-shaped material deformations together with the butting. However, to make the tube body manufacturing process flexible and to meet special customer requests To be able to take into account, it is advantageous to separate the work processes and, in certain cases, even to apply the material deformations only last, ie after the application of the sealant layer. However, this poses particular problems in production, since the sealant layer makes it more difficult to clamp or center the tube body. For example, rolling of the depressions is out of the question since it is not possible to insert a suitable holder into the tube.
  • This object is achieved in that the tube is clamped from the outside in the area to be deformed essentially over the entire circumference and is deformed at least in a partial section of the circumference.
  • the device has a holding mandrel for holding the tube body, the outer diameter of which is matched to the inner diameter of the tube at least in the front region and the outer diameter of which is smaller in the region of the section of the tube to be deformed than the inner diameter of the tube that Holding mandrel for supporting the open tube end has a supporting device, and that around the holding mandrel at least three concentrically closable jaws for applying the deformation are arranged, the surface of which faces the tube wall in the closed state is adapted to the desired configuration of the material deformation.
  • the special configuration of the holding mandrel clearly shows that the tube is held in a form-fitting manner in its front area, while it does not rest in the area of the deformation. This prevents the already applied sealant layer from coming into contact with the holding mandrel and sticking.
  • the support device at the open end of the tube ensures easy expansion of the tube end.
  • the concentrically lockable jaws allow material deformation of any configuration to be applied without damaging the relatively unstable and flexible tube body.
  • the open tube end can be widened particularly optimally if the support device is a truncated cone that is adjustable in the axial direction on the holding mandrel. In this way, slightly compressed tube bodies are deformed back into an exactly conical starting position. The adjustability of the support device on the holding mandrel ensures a precise adjustment of the expansion. The widening at the end of the tube later makes it easier to separate the stacked tubes.
  • the holding mandrel is provided with an ejection device.
  • the ejection device consists of a bore in the holding mandrel that can be fed with compressed air. Obviously, a short burst of compressed air is sufficient to eject the tube from the device.
  • the advantage of this ejection device is that it does not require any moving parts.
  • the jaws of the device can be moved particularly easily if they are surrounded by a common locking ring which is displaceable in the axial direction and which has a conical inner wall for simultaneously pressing the jaws together. This ensures that all jaws are pressed against the tube jacket with the same force at the same time.
  • the jaws on the outer wall are also particularly advantageously provided with a corresponding cone.
  • the closing stroke of the jaws can be determined particularly easily by appropriately selecting the cone inclination.
  • this type of jaw actuation ensures the use of mechanically simple actuation devices.
  • a tube body 1 consists of a conical tube jacket 2, which opens out into a shoulder 4 at the front, to which the closure cap 3 is attached.
  • the sealing caps 3 lie on the Shoulder 4 on.
  • the stacking division C is also determined by the height of the closure cap 3.
  • a sealant layer 5 with a layer thickness E is applied to an annular sealant section with the sealant area A.
  • This sealant layer can consist, for example, of acrylic resin dispersion or of another suitable material.
  • the tube end is provided with an inwardly directed bead 6, which has the width B and whose inner diameter D is smaller than the inner diameter of the end region 8 of the sealing material layer adjacent to the material deformation. This dimensioning prevents the sealant layer from touching through the inserted tube at any cone angle.
  • the bead 6 has a material deformation with the depth F, which rises by the amount F minus E over the layer thickness E of the sealant section.
  • the inserted tube 1 ' is supported on the one hand on the shoulder 4 and on the other hand on the bead 6.
  • play should be provided between the bead 6 on the inside diameter D and the inserted tube.
  • the space between the tube bodies 1 and 1 ' depends on the cone angle, on the stack pitch C and on the inside diameter D of the bead 6.
  • the bead 6 reinforces the tube end in such a way that even when the tubes are stacked together, an unintentional compression in the sealant area A is no longer possible.
  • 3 shows a modified exemplary embodiment in which the material deformation consists of three partial indentations 7 lying on the same plane.
  • the material deformation could also be designed as a step-like depression.
  • the sealant area A, the width B of the bead 6 and the stacking division C can also be changed as desired, depending on the circumstances and the tube configuration.
  • the choice of the correct thickness of the sealant layer 5 is readily possible for the person skilled in the art and is not specified in more detail here.
  • the tube body is held by a holding mandrel 9, which is adapted in its front area to the inside diameter of the tube.
  • the outer diameter of the holding mandrel 9 in the region of the deformation or in the region of the sealant layer 5 is smaller than the inner diameter of the tube. In this way, the holding mandrel 9 does not come into contact with the sealant layer 5.
  • the tube body 1 is pushed up to the shoulder 4 on the holding mandrel 9 by a feed device, not shown.
  • the cap 3 is already screwed onto the tube body.
  • the holding mandrel 9 is provided over its entire length with a bore 12 through which compressed air can be blown to expel the tube body.
  • a support device 10 is provided, which is advantageously designed as a truncated cone. In order to be able to adapt the support device to the different tube lengths, it can be adjusted on the holding mandrel 9. When the tube body 1 is pushed onto the retaining dome 9, the open tube end 16 is slightly widened on the conical support device 10.
  • the support device is set in such a way that the open tube end 16 is reliably supported in any case even in the event of tolerance fluctuations in the tube length.
  • the extension at the end of the tube has the advantage that the stacked tubes can later be separated more easily.
  • the jaws 11 are mounted in a jaw guide 13, not shown in detail, and are radially displaceable. It has proven to be particularly advantageous if three concentrically displaceable jaws are used to apply the deformation. Of course, it is also possible to use a larger number of jaws.
  • the jaws are actuated by a common locking ring 14.
  • the locking ring comprises all jaws 11 and is connected to a push rod 15.
  • the locking ring 14 has a conical inner wall 18 with which the jaws 11 are pushed together concentrically in the direction of the arrow X. This is done by axially advancing the locking ring 14 with the aid of the push rod 15 in the direction of the arrow Y.
  • the jaws 11 which are rigid in the axial direction and which are mounted in the jaw guide 13 are pressed together.
  • the figure shows the device in the starting position above the center line and the device with pressed-on jaws 11 below the center line.
  • the force required for actuating the push rod 15 is applied by an actuating device, not shown, which preferably consists of a hydraulic or pneumatic lifting cylinder.
  • the cheek outer walls 19 are advantageously also conical. In this case, an axial force component is converted into a radial force component in a particularly simple manner by advancing the locking ring 14.
  • the jaws can be operated in other ways. For example, it would be conceivable to move the individual jaws on the jaw guide using racks and bevel gears.
  • the cheek surfaces 17 facing the tube jacket are provided with projections 20 which, on the conical tube jacket, produce the desired beads when the jaws are pressed together.
  • the projections 20 can have any configuration exhibit. Even after the circular beads 6 have been pressed in, the tube casing does not touch the holding mandrel 9 at any point in this region.
  • the method and the device allow a rational and flexible production of conical tube bodies of the type mentioned.
  • jaws 11 With other tube dimensions, only the holding mandrel 9 or the jaws 11 need to be replaced. Depending on the type and nature of the sealant layer 5, jaws 11 with different jaw surfaces 17 can also be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Materials For Medical Uses (AREA)
  • External Artificial Organs (AREA)

Description

Die Erfindung betrifft einen stapelbaren, konischen Tubenkörper, dessen offenes Ende zum dichtenden Verschliessen an einem ringförmigen Dichtstoffabschnitt auf der Innenseite mit einem Dichtstoff versehen ist. Die Erfindung bezieht sich auf ein Verfahren zur Herstellung derartiger Tubenkörper sowie auf eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a stackable, conical tube body, the open end of which is provided on the inside with a sealant for sealing closure on an annular sealant section. The invention relates to a method for producing such tube bodies and to an apparatus for performing the method.

Derart stapelbare Tubenkörper erlauben ein besonders platzsparenders und rationelles Verpacken der Tubenkörper für den Versand an den Abfüller. Nach dem Abfüllen werden die Tuben an ihrem offenen Ende im Bereich der Dichtstoffschicht durch Zusammenfalzen verschlossen.Such stackable tube bodies allow a particularly space-saving and efficient packaging of the tube bodies for shipping to the bottler. After filling, the tubes are closed at the open end in the area of the sealant layer by folding them together.

Derartige TLben wurden z.B. bereits durch die DE-OS 25 22 511 bekannt, bei der der Dichtstoff aus einer wachsartigen Masse besteht. Wenn die Dichtstoffschicht aus einem Klebstoff besteht, entstehen beim Stapeln der Tubenkörper insofern Probleme, als dass die gestapelten Tuben den Dichstoff auf keinen Fall berühren dürfen.Such letters were e.g. already known from DE-OS 25 22 511, in which the sealant consists of a wax-like mass. If the sealant layer consists of an adhesive, problems arise when the tube bodies are stacked in that the stacked tubes must not touch the sealant under any circumstances.

Durch die deutsche Patentschrift Nr. 2 009 692 ist bereits ein konischer Tubenkörper bekannt geworden, dessen offenes Ende einen erweiterten Abschnitt mit gleicher Konizität wie der Tubenmantel aufweist. Der Dichtstoffring ist im Innern dieses erweiterten Abschnittes aufgetragen. Der Durchmesser des erweiterten Abschnittes ist derart gewählt, dass der Dichtstoffring mit der nächsten eingeschobenen Tube nicht in Berührung kommt. Der Nachteil dieser Konfiguration besteht jedoch darin, dass sich die Tubenwände beim Ineinanderstapeln direkt berühren. Dadurch haften die Tuben derart stark aneinander, dass einerseits das Vereinzeln der Tuben erschwert wird und dass andererseits eine Beschädigung der bereits bedruckten Tubenoberfläche möglich ist. Ein weiterer Nachteil des erweiterten Tubenendes liegt darin, dass beim Zusammenfalten dieses Bereiches relativ zum Tubenkörper nach aussen vorstehende Kanten entstehen. Diese scharfkantigen Vorsprünge führen leicht zu Verletzungen und wirken zudem unschön. Der erweiterte Tubenabschnitt bietet auch bei der Herstellung einige Schwierigkeiten, da beim erforderlichen starken Ausweiten Längsrisse am Tubenende auftreten können.A conical tube body is already known from German Patent No. 2 009 692, the open end of which has an enlarged section with the same conicity as the tube jacket. The seal ring is applied inside this extended section. The diameter of the enlarged section is selected such that the sealant ring does not come into contact with the next inserted tube. However, the disadvantage of this configuration is that the tube walls touch directly when stacked one inside the other. As a result, the tubes adhere to one another to such an extent that, on the one hand, it is difficult to separate the tubes and, on the other hand, damage to the already printed tube surface is possible. Another disadvantage of the extended tube end is that when this area is folded together, edges that protrude outward relative to the tube body arise. These sharp-edged projections easily lead to injuries and also look unattractive. The expanded tube section also presents some difficulties in production, since longitudinal cracks can occur at the end of the tube if the necessary expansion is required.

Die Aufgabe der Erfindung besteht insbesondere darin, die Nachteile des Bekannten zu vermeiden und einen stapelbaren Tubenkörper zu schaffen, der einfach herzustellen ist, mit dem eine schonende Stapelung der Tubenkörper ermöglicht wird und bei dem zudem eine Verstärkung des offenen Tubenendes erreicht wird.The object of the invention is, in particular, to avoid the disadvantages of the known and to create a stackable tube body which is simple to manufacture, with which a gentle stacking of the tube body is made possible and in which a reinforcement of the open tube end is also achieved.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass neben dem Dichtstoffabschnitt zum Schutz des Dichtstoffes beim Stapeln der Tuben der Tubenkörper mit wenigstens einer gegen die Tubenachse gerichteten Materialverformung versehen ist, und dass der Innendurchmesser im Bereich der Materialverformung kleiner ist als der Innendurchmesser des der Materialverformung benachbarten Endbereichs der Dichtstoffschicht.This object is achieved according to the invention in that, in addition to the sealant section for protecting the sealant when the tubes are stacked, the tube body is provided with at least one material deformation directed against the tube axis, and in that the inner diameter in the region of the material deformation is smaller than the inner diameter of the end region adjacent to the material deformation the sealant layer.

Diese nach innen gerichtete Materialverformung schützt den unmittelbar anschliessenden Dichtstoffabschnitt vor einer Berührung mit dem eingeschobenen Tubenkörper. Andererseits wird mit der Materialverformung jedoch auch erreicht, dass sich die Tubenwände nicht unmittelbar berühren. Dies schützt die Tubenoberfläche vor Beschädigung, verhindert das eventuelle Zusammenkleben der Lackbeschichtung und erleichtert das Vereinzeln der Tuben.This inward material deformation protects the immediately adjacent sealant section from contact with the inserted tube body. On the other hand, the material deformation also ensures that the tube walls do not touch directly. This protects the tube surface from damage, prevents the paint coating from sticking together and makes it easier to separate the tubes.

Um den Dichtstoffabschnitt vor unbeabsichtigem Zusammenquetschen zu schützen, ist es besonders vorteilhaft, wenn gemäss einer weiteren Ausgestaltung der Erfindung die Materialverformung zwischen dem Dichtstoffabschnitt und dem offenen Tubenende angeordnet ist. Bei dieser Anordnung ist der Dichtstoffabschnitt ersichtlicherweise auch bei den gestapelten Tuben immer geschützt.In order to protect the sealant section from being accidentally squeezed together, it is particularly advantageous if, according to a further embodiment of the invention, the material deformation is arranged between the sealant section and the open tube end. With this arrangement, the sealant section is evidently always protected even with the stacked tubes.

Besonders einfach und vorteilhaft lässt sich die Erfindung realisieren, wenn die Materialverformung als ringförmige Sicke ausgebildet ist. Der Vorteil dieser Konfiguration besteht in der Verstärkung und Versteifung der gesamten Randpartie an der Tubenöffnung.The invention can be implemented particularly simply and advantageously if the material deformation is designed as an annular bead. The advantage of this configuration is the reinforcement and stiffening of the entire edge area at the tube opening.

Wenn die Breite der Sicke wenigstens einen Millimeter beträgt, kann der Innendurchmesser etwa so dimensioniert werden, dass zwischen den Tubenmänteln ein ausreichender Zwischenraum entsteht, ohne dass die Sicke einen zu kleinen Radius aufweisen muss. Ersichtlicherweise wird die Tiefe der Sicke so gewählt, dass sich die Materialverformung gerarde noch über die Schichtdicke der Dichtstoffschicht erhebt. Diese Voraussetzung gilt auch dann, wenn die Sicke keinen halbrunden Querschnitt aufweist. Die Sicke kann z.B. auch einen etwa trapezförmigen Querschnitt aufweisen. die Gefahr der Rissbildung ist bei der erfindungsgemässen Sicke nicht vorhanden, da bei einer Verformung nach Innen der Tubenmantel nicht gedehnt, sondern zusammengestaucht wird.If the width of the bead is at least one millimeter, the inner diameter can be dimensioned such that there is sufficient space between the tube shells without the bead having to have a radius that is too small. Obviously, the depth of the bead is chosen so that the material deformation just rises above the layer thickness of the sealant layer. This requirement also applies if the bead does not have a semicircular cross-section. The bead can e.g. also have an approximately trapezoidal cross section. there is no risk of cracking in the bead according to the invention, since if the tube is deformed inwards, it is not stretched but compressed.

Gemäss einer weiteren Ausgestaltung der Erfindung besteht die Materialverformung aus zwei ringförmigen Sicken, welche auf beiden Seiten des Dichtstoffabschnittes angeordnet sind. Die zweite Sicke bewirkt einen zusätzlichen Schutz bei von aussen wirkenden, radialen Belastungen des Tubenmantels.According to a further embodiment of the invention, the material deformation consists of two annular beads which are arranged on both sides of the sealant section. The second bead provides additional protection against external radial loads on the tube casing.

Derartige Tubenkörper werden in der Regel in einem einzigen Arbeitsgang konifiziert. Es wäre theoretisch denkbar, auch die ringförmigen Materialverformungen zusammen mit dem Konifizieren anzubringen. Um jedoch den Herstellungsprozess der Tubenkörper flexibel zu gestalten und um besondere Kundenwünsche berücksichtigen zu können, ist es vorteilhaft, die Arbeitsvorgänge zu trennen und in bestimmten Fällen sogar die Materialverformungen erst zuletzt, d.h. nach dem Auftragen der Dichtstoffschicht anzubringen. Dies bringt jedoch besondere Probleme bei der Fabrikation mit sich, da die Dichtstoffschicht das Einspannen bzw. Zentrieren des Tubenkörpers erschwert. So fällt beispielsweise ein Anrollen der Vertiefungen ausser Betracht, da es nicht möglich ist, eine geeignete Halterung in die Tube einzuschieben.Such tube bodies are usually butted in a single operation. It would theoretically be conceivable to also apply the ring-shaped material deformations together with the butting. However, to make the tube body manufacturing process flexible and to meet special customer requests To be able to take into account, it is advantageous to separate the work processes and, in certain cases, even to apply the material deformations only last, ie after the application of the sealant layer. However, this poses particular problems in production, since the sealant layer makes it more difficult to clamp or center the tube body. For example, rolling of the depressions is out of the question since it is not possible to insert a suitable holder into the tube.

Es ist daher eine weitere Aufgabe der Erfindung, ein Verfahren zu schaffen, mit dem Tubenkörper der eingangs genannten Art verformt werden können, ohne dass die Tube dabei beschädigt wird, ohne dass eine spezielle Gegenhalterung in die Tube eingeführt werden muss, und ohne dass eine allenfalls bereits angebrachte Dichtstoffschicht den Arbeitsprozess behindert. Diese Aufgabe wird dadurch gelöst, dass die Tube von aussen in dem zu verformenden Bereich im wesentlichen über den gesamten Umfang eingespannt und wenigstens in einem Teilabschnitt des Umfangs verformt wird.It is therefore a further object of the invention to provide a method with which tube bodies of the type mentioned at the outset can be deformed without the tube being damaged in the process, without a special counter-holder having to be inserted into the tube, and without one at all Already applied sealant layer hinders the work process. This object is achieved in that the tube is clamped from the outside in the area to be deformed essentially over the entire circumference and is deformed at least in a partial section of the circumference.

Durch das Einspannen des Tubenmantels am gesamten Umfang kann eine Verformung angebracht werden, ohne dass der unstabile und biegsame Tubenkörper beschädigt wird. Das Vorhandensein einer Halterung oder Presslehre im Inneren der Tube ist nicht erforderlich, da die Tube wegen der allseitigen Einspannung am Umfang nicht verbogen werden kann.By clamping the tube casing over the entire circumference, a deformation can be applied without damaging the unstable and flexible tube body. The presence of a holder or press gauge in the interior of the tube is not necessary since the tube cannot be bent on the circumference due to the all-round clamping.

Es ist ausserdem eine weitere Aufgabe der Erfindung, eine Vorrichtung zum Verformen eines konischen Tubenkörpers zu schaffen, welche das Anbringen von Vertiefungen im Tubenmantel insbesondere bei bereits vorhandener Dichtstoffschicht erlaubt. Diese Aufgabe wird dadurch gelöst, dass die Vorrichtung einen Haltedorn zum Festhalten des Tubenkörpers aufweist, dessen Aussendurchmesser wenigstens im vorderen Bereich dem Innendurchmesser der Tube angepasst ist und dessen Aussendurchmesser im Bereich des zu verformenden Abschnittes der Tube kleiner ist als der Innendurchmesser der Tube, dass der Haltedorn zum Abstützen des offenen Tubenendes eine Abstützvorrichtung aufweist, und dass um den Haltedorn wenigstens drei konzentrisch schliessbare Backen zum Anbringen der Verformung angeordnet sind, deren der Tubenwandung zugewandte Oberfläche im geschlossenen Zustand der gewünschten Konfiguration der Materialverformung angepasst ist.It is also a further object of the invention to provide a device for deforming a conical tube body, which allows indentations to be made in the tube jacket, in particular if the sealant layer is already present. This object is achieved in that the device has a holding mandrel for holding the tube body, the outer diameter of which is matched to the inner diameter of the tube at least in the front region and the outer diameter of which is smaller in the region of the section of the tube to be deformed than the inner diameter of the tube that Holding mandrel for supporting the open tube end has a supporting device, and that around the holding mandrel at least three concentrically closable jaws for applying the deformation are arranged, the surface of which faces the tube wall in the closed state is adapted to the desired configuration of the material deformation.

Durch die besondere Konfiguration des Haltedornes wird die Tube ersichtlicherweise in ihrem vorderen Bereich formschlüssig gehalten, während sie im Bereich der Verformung nicht aufliegt. Dadurch wird verhindert, dass die bereits aufgetragene Dichtstoffschicht mit dem Haltedorn in Berührung kommt und festklebt. Die Abstützvorrichtung am offenen Tubenende gewährleistet eine leichte Aufweitung des Tubenendes. Die konzentrisch schliessbaren Backen erlauben das Anbringen einer Materialverformung von beliebiger Konfiguration ohne dass dabei der relativ unstabile und biegsame Tubenkörper beschädigt wird.The special configuration of the holding mandrel clearly shows that the tube is held in a form-fitting manner in its front area, while it does not rest in the area of the deformation. This prevents the already applied sealant layer from coming into contact with the holding mandrel and sticking. The support device at the open end of the tube ensures easy expansion of the tube end. The concentrically lockable jaws allow material deformation of any configuration to be applied without damaging the relatively unstable and flexible tube body.

Besonders optimal kann das offene Tubenende aufgeweitet werden, wenn die Abstützvorrichtung ein auf dem Haltedorn in axialer Richtung verstellbarer Kegelstumpf ist. Auf diese Weise werden auch leicht zusammengestauchte Tubenkörper wieder in eine exakt konische Ausgangslage verformt. Die Verstellbarkeit der Abstützvorrichtung auf dem Haltedorn gewährleistet eine genaue Justierung der Aufweitung. Die Aufweitungen am Tubendenen erleichtern später das Vereinzeln der gestapelten Tuben.The open tube end can be widened particularly optimally if the support device is a truncated cone that is adjustable in the axial direction on the holding mandrel. In this way, slightly compressed tube bodies are deformed back into an exactly conical starting position. The adjustability of the support device on the holding mandrel ensures a precise adjustment of the expansion. The widening at the end of the tube later makes it easier to separate the stacked tubes.

Zum leichteren Entfernen der Tubenkörper aus der Vorrichtung ist der Haltedorn mit einer Ausstossvorrichtung versehen Diese kann auf besonders einfache Weise realisiert werden, wenn die Ausstossvorrichtung aus einer mit Pressluft speisbaren Bohrung im Haltedörn besteht. Ersichtlicherweise genügt bereits ein kurzer Pressluftstoss zum Auswerfen der Tube aus der Vorrichtung. Der Vortiel dieser Ausstossvorrichtung besteht darin, dass sie ohne bewegliche Teile auskommt.To make it easier to remove the tube body from the device, the holding mandrel is provided with an ejection device. This can be implemented in a particularly simple manner if the ejection device consists of a bore in the holding mandrel that can be fed with compressed air. Obviously, a short burst of compressed air is sufficient to eject the tube from the device. The advantage of this ejection device is that it does not require any moving parts.

Die Backen der Vorrichtung lassen sich besonders einfach verschieben, wenn sie von einem gemeinsamen Schliessring umgeben sind, welcher in axialer Richtung verschiebbar ist und welcher eine konische Innenwandung zum gleichzeitigen Zusammenpressen der Backen aufweist. Auf diese Weise ist gewährleistet, dass alle Backen gleichzeitig mit der gleichen Kraft gegen den Tubenmantel gepresst werden. Besonders vorteilhaft werden auch die Backen an der Aussenwandung mit einem korrespondierenden Konus versehen. Durch entsprechende Wahl der Konusneigung kann dabei besonders einfach der Schliesshub der Backen bestimmt werden. Ausserdem gewährleistet diese Art der Backenbetätigung den Einsatz mechanisch einfacher Betätigungsvorrichtungen.The jaws of the device can be moved particularly easily if they are surrounded by a common locking ring which is displaceable in the axial direction and which has a conical inner wall for simultaneously pressing the jaws together. This ensures that all jaws are pressed against the tube jacket with the same force at the same time. The jaws on the outer wall are also particularly advantageously provided with a corresponding cone. The closing stroke of the jaws can be determined particularly easily by appropriately selecting the cone inclination. In addition, this type of jaw actuation ensures the use of mechanically simple actuation devices.

Beispiele der Erfindungsgegenstandes sind nachstehend beschrieben und zeishnerisch dargestellt. Es ziegen:

  • Fig. 1 Zwei ineinander gestapelte Tubenkörper mit den Merkmalen der Erfindung,
  • Fig. 2 eine Teilansicht der Tubenöffnung in vergrössertem Masstab,
  • Fig. 3 ein abgewandeltes Ausführungsbeispiel mit partiellen Einbuchtungen,
  • Fig. 4 ein weiteres Ausführungsbeispiel mit zwei ringförmigen Sicken, und
  • Fig. 5 einen vereinfacht dargestellten Teilquerschnitt durch eine Vorrichtung zum Anbringen der Sicken.
Examples of the subject matter of the invention are described below and shown in drawings. Goats:
  • 1 two stacked tube bodies with the features of the invention,
  • 2 is a partial view of the tube opening on an enlarged scale,
  • 3 shows a modified embodiment with partial indentations,
  • Fig. 4 shows another embodiment with two annular beads, and
  • Fig. 5 shows a simplified partial cross section through a device for attaching the beads.

Gemäss Fig. 1 besteht ein Tubenkörper 1 aus einem konischen Tubenmantel 2, der vorne in eine Schulter 4 auslaüft, an welcher die Verschlusskappe 3 befestigt ist. Beim Ineinanderstapeln liegen die Verschlusskappen 3 an der Schulter 4 auf. Durch die Höhe der Verschlusskappe 3 ist auch die Stapelteilung C festgelegt. Am offenen Ende der Tube ist an einem ringförmigen Dichtstoffabschnitt mit dem Dichtstoffbereich A eine Dichtstoffschicht 5 mit einer Schichtdicke E aufgetragen. Diese Dichtstoffschicht kann beispielsweise aus Acrylharzdispersion oder aus einem anderen geeigneten Material bestehen. Nach der Dichtstosschicht ist das Tubenende mit einer nach innen gerichteten Sicke 6 versehen, welche die Breite B aufweist und deren Innendurchmesser D kleiner ist als der Innendurchmesser des der Materialverformung benachbarten Endbereichs 8 der Dichtstoffschicht. Durch diese Dimensionierung ist ein Berühren der Dichtstoffschicht durch die eingeschobene Tube bei jedem beliebigen Konifizierwinkel ausgeschlossen. Die Sicke 6 weist eine Materialverformung mit der Tiefe F auf, welche sich um das Mass F minus E über die Schichtdicke E des Dichtstoffabschnittes erhebt.According to FIG. 1, a tube body 1 consists of a conical tube jacket 2, which opens out into a shoulder 4 at the front, to which the closure cap 3 is attached. When stacking into one another, the sealing caps 3 lie on the Shoulder 4 on. The stacking division C is also determined by the height of the closure cap 3. At the open end of the tube, a sealant layer 5 with a layer thickness E is applied to an annular sealant section with the sealant area A. This sealant layer can consist, for example, of acrylic resin dispersion or of another suitable material. After the sealing joint layer, the tube end is provided with an inwardly directed bead 6, which has the width B and whose inner diameter D is smaller than the inner diameter of the end region 8 of the sealing material layer adjacent to the material deformation. This dimensioning prevents the sealant layer from touching through the inserted tube at any cone angle. The bead 6 has a material deformation with the depth F, which rises by the amount F minus E over the layer thickness E of the sealant section.

Durch diese Anordnung wird die eingeschobene Tube 1' einerseits an der Schulter 4 und andererseits an der Sicke 6 abgestützt. Um jedoch das nachträgliche Vereinzeln der Tuben zu erleichtern, sollte zwischen der Sicke 6 am Innendurchmesser D und der eingeschobenen Tube ein Spiel vorgesehen sein. Der Zwischenraum zwischen den Tubenkörpern 1 und 1' ist abhängig vom Konifizierwinkel, von der Stapelteilung C und vom Innendurchmesser D der Sicke 6. Die Sicke 6 verstärkt das Tubenende derart, dass auch bei zusammengestapelten Tuben ein unbeabsichtigtes Zusammendrücken im Dichtstoffbereich A nicht mehr möglich ist.With this arrangement, the inserted tube 1 'is supported on the one hand on the shoulder 4 and on the other hand on the bead 6. However, in order to facilitate the subsequent separation of the tubes, play should be provided between the bead 6 on the inside diameter D and the inserted tube. The space between the tube bodies 1 and 1 'depends on the cone angle, on the stack pitch C and on the inside diameter D of the bead 6. The bead 6 reinforces the tube end in such a way that even when the tubes are stacked together, an unintentional compression in the sealant area A is no longer possible.

Ersichtlicherweise sind auch andere Ausgestaltungen möglich, ohne den Gegenstand der Erfindung zu verlassen. Fig. 3 zeigt ein abgewandeltes Ausführungsbeispiel, bei dem die Materialverformung aus drei auf der gleichen Ebene liegenden, partiellen Einbuchtungen 7 besteht.Obviously, other configurations are possible without departing from the subject matter of the invention. 3 shows a modified exemplary embodiment in which the material deformation consists of three partial indentations 7 lying on the same plane.

Die Materialverformung könnte auch als stufenartige Vertiefung ausgebildet sein. Auch der Dichtstoffbereich A, die Breite B der Sicke 6, sowie die Stapelteilung C können je nach den Gegebenheiten und nach der Tubenkonfiguration beliebig geändert werden. Die Wahl der richtigen Dicke der Dichtstoffschicht 5 ist dem Fachmann ohne weiteres möglich und wird hier nicht näher spezifiziert.The material deformation could also be designed as a step-like depression. The sealant area A, the width B of the bead 6 and the stacking division C can also be changed as desired, depending on the circumstances and the tube configuration. The choice of the correct thickness of the sealant layer 5 is readily possible for the person skilled in the art and is not specified in more detail here.

Wie dargestellt wird der Tubenkörper von einem Haltedorn 9 gehalten, der in seinem vorderen Bereich dem Innendurchmesser der Tube angepasst ist. Dagegen ist der Aussendurchmesser des Haltedornes 9 im Bereich der Verformung bzw. im Bereich der Dichtstoffschicht 5 kleiner als der Innendurchmesser der Tube. Auf diese Weise kommt der Haltedron 9 nicht mit der Dichtstoffschicht 5 in Berührung. Die Tubenkörper 1 werden durch eine nicht dargestellte Zuführvorrichtung bis an die Schulter 4 auf den Haltedorn 9 aufgeschoben. Dabei ist die Verschlusskappe 3 bereits auf den Tubenkörper aufgeschraubt. Der Haltedorn 9 ist auf seiner gesamten Länge mit einer Bohrung 12 versehen, durch welche zum Ausstossen des Tubenkörpers Pressluft geblasen werden kann.As shown, the tube body is held by a holding mandrel 9, which is adapted in its front area to the inside diameter of the tube. In contrast, the outer diameter of the holding mandrel 9 in the region of the deformation or in the region of the sealant layer 5 is smaller than the inner diameter of the tube. In this way, the holding mandrel 9 does not come into contact with the sealant layer 5. The tube body 1 is pushed up to the shoulder 4 on the holding mandrel 9 by a feed device, not shown. The cap 3 is already screwed onto the tube body. The holding mandrel 9 is provided over its entire length with a bore 12 through which compressed air can be blown to expel the tube body.

Zum Abstützen und Aufweiten des offenen Tubendendes 16 ist eine Abstützvorrichtung 10 vorgesehen, welche vorteilhaft als Kegelstumpf ausgebildet ist. Um die Abstützvorrichtung den vershiedenen Tubenlängen anpassen zu können, ist diese auf dem Haltedorn 9 verstellbar. Beim Aufschieben des Tubenkörpers 1 auf den Haltedom 9 erfolgt an der konischen Abstützvorrichtung 10 eine leichte Aufweitung des offenen Tubenendes 16. Die Abstützvorrichtung wird derart eingestellt, dass auch bei Toleranzschwankungen der Tubenlänge das offene Tubenende 16 in jedem Fall zuverlässig abgestützt wird. Die Ausweitung am Tubenende hat den Vorteil, dass die gestapelten Tuben später leichter vereinzelt werden können.To support and widen the open tube end 16, a support device 10 is provided, which is advantageously designed as a truncated cone. In order to be able to adapt the support device to the different tube lengths, it can be adjusted on the holding mandrel 9. When the tube body 1 is pushed onto the retaining dome 9, the open tube end 16 is slightly widened on the conical support device 10. The support device is set in such a way that the open tube end 16 is reliably supported in any case even in the event of tolerance fluctuations in the tube length. The extension at the end of the tube has the advantage that the stacked tubes can later be separated more easily.

Die Backen 11 sind in einer nicht genauer dargestellten Backenführung 13 gelagert und radial verschiebbar. Als besonders vorteilhaft hat es sich erwiesen, wenn zum Anbringen der Verformung drei konzentrisch verschiebbare Backen verwendet werden. Selbstverständlich ist es jedoch auch möglich, eine grössere Anzahl Backen zau verwenden. Die Backen werden durch einen gemeinsamen Schliessring 14 betätigt. Der Schliessring umfasst alle Backen 11 und ist mit einer Schubstange 15 verbunden. Der Schliessring 14 weist eine konische Innenwandung 18 auf, mit der die Backen 11 in Pfeilrichtung X konzentrisch zusammengeschoben werden. Dies geschieht durch axiales Vorschieben des Schliessringes 14 mit Hilfe der Schubstange 15 in Pfeilrichtung Y. Beim Zurücklegen des Hubes H werden die in axialer Richtung starren Backen 11, welche in der Backenführung 13 gelagert sind, zusammengepresst. Die Abbildung zeigt oberhalb der Mittellinie die Vorrichtung in der Ausgangsstellung und unterhalb der Mittelinie die Vorrichtung mit angepressten Backen 11. Die für das Betätigen der Schubstange 15 erforderliche Kraft wird durch eine nicht dargestellte Betätigungsvorrichtung aufgebracht, welche vorzugsweise aus einem hydraulischen oder pneumatischen Hubzylinder besteht. Die Backenaussenwandungen 19 sind vorteilhaft ebenfalls konisch ausgebildet. Dabei wird auf besonders einfache Weise eine axiale Kraftkomponente durch Vorschieben des Schliessringes 14 in eine radiale Kraftkomponente umgewandelt. Ersichtlicherweise können die Backen auch auf andere Art und Weise betätigt werden. So wäre es beispielsweise denkbar, die einzelnen Backen an der Backenführung mittels Zahnstangen und Kegelrädern zu bewegen.The jaws 11 are mounted in a jaw guide 13, not shown in detail, and are radially displaceable. It has proven to be particularly advantageous if three concentrically displaceable jaws are used to apply the deformation. Of course, it is also possible to use a larger number of jaws. The jaws are actuated by a common locking ring 14. The locking ring comprises all jaws 11 and is connected to a push rod 15. The locking ring 14 has a conical inner wall 18 with which the jaws 11 are pushed together concentrically in the direction of the arrow X. This is done by axially advancing the locking ring 14 with the aid of the push rod 15 in the direction of the arrow Y. When the stroke H is covered, the jaws 11 which are rigid in the axial direction and which are mounted in the jaw guide 13 are pressed together. The figure shows the device in the starting position above the center line and the device with pressed-on jaws 11 below the center line. The force required for actuating the push rod 15 is applied by an actuating device, not shown, which preferably consists of a hydraulic or pneumatic lifting cylinder. The cheek outer walls 19 are advantageously also conical. In this case, an axial force component is converted into a radial force component in a particularly simple manner by advancing the locking ring 14. Obviously, the jaws can be operated in other ways. For example, it would be conceivable to move the individual jaws on the jaw guide using racks and bevel gears.

Die dem Tubenmantel zugewandten Backenoberflächen 17 sind mit Vorsprüngen 20 versehen, welche am konischen Tubenmantel beim Zusammenpressen der Backen die gewünschten Sicken ergeben. Die Vorsprünge 20 können dabei jede beliebige Konfiguration aufweisen. Auch nach dem Einpressen der kreisförmigen Sicken 6 berührt der Tubenmantel in diesem Bereich an keiner Stelle den Haltedorn 9.The cheek surfaces 17 facing the tube jacket are provided with projections 20 which, on the conical tube jacket, produce the desired beads when the jaws are pressed together. The projections 20 can have any configuration exhibit. Even after the circular beads 6 have been pressed in, the tube casing does not touch the holding mandrel 9 at any point in this region.

Das Verfahren und die Vorrichtung erlauben eine rationelle und flexible Fertigung von konischen Tubenkörpern der genannten Art.The method and the device allow a rational and flexible production of conical tube bodies of the type mentioned.

Bei anderen Tubenabmessungen brauchen lediglich der Haltedorn 9 bzw. die Backen 11 ausgewechselt zu werden. Je nach Art und Beschaffenheit der Dichtstoffschicht 5 können auch Backen 11 mit unterschiedlichen Backenoberflächen 17 eingesetzt werden.With other tube dimensions, only the holding mandrel 9 or the jaws 11 need to be replaced. Depending on the type and nature of the sealant layer 5, jaws 11 with different jaw surfaces 17 can also be used.

Claims (20)

1. A stackable tapered tube body (1) whose open end (16) is provided, for sealing closure thereof, with a sealing material on the inside at an annular sealing material section, characterised in that the tube body is provided with at least one corrugation (6) which is directed towards the axis of the tube, beside the sealing material layer (5), for protecting the sealing material when the tubes are stacked, and that the internal diameter in the region of the corrugation (6) is less than the internal diameter of the end region of the sealing material layer (5), which end region is adjacent the corrugation (6).
2. A tube body according to claim 1 characterised in that the corrugation (6) is arranged between the sealing material layer (5) and the open end (16) of the tube.
3. A tube body according to claim 1 and claim 2 characterised in that the corrugation (6) is of an annular configuration.
4. A tube body according to claim 3 characterised in that the width of the annular corrugation is at least one millimetre.
5. A tube body according to claim 1 and claim 2 characterised in that the corrugation (6) comprises at least two partial indentation portions disposed in the same plane.
6. A tube body according to claim 3 characterised in that two annular corrugations (6) are arranged on both sides of the sealing material section (5).
7. A method of producing corrugation-like depressions (16) which are directed towards the axis of a tube, in a wall region, adjacent the tube end, of a tapered tube body (1) comprising cold- deformable material, in particular aluminium, comprising a tube casing portion (2) having an open end (16), and a shoulder having a closable tube opening, characterised in that the tube (1) is gripped from the outside in the region to be deformed substantially over the entire periphery and is deformed in at least a portion of the periphery.
8. A method according to claim 7 characterised in that the tube (1) is firstly fixed at at least two gripping locations, wherein the first gripping location is the inside wall of the shoulder (4) and/or the directly adjacent tube wall, where at least one holding mandrel (9) which approximately corresponds to the internal diameter of the tube and which centres the tube is mounted, and that the second gripping locations is the open end (16) of the tube, which is supported both radially and also in the longitudinal direction of the tube.
9. A method according to claim 8 characterised in that the open end (16) of the tube is opened out at the second gripping location.
10. A method according to claim 7 characterised in that the tube (1) is gripped in the region to be deformed and is simultaneously deformed during the gripping operation.
11. Apparatus for deforming a tapered tube body (1) having at least one corrugation-like depression (6) in the tube casing portion (2), which depression is directed towards the axis of the tube, characterised in that the apparatus has a hoidhg mandrel (9) for securing the tube body (1), whose outside diameter is adapted at least in the forward region to the internal diameter of the tapered tube and whose external diameter in the region of the section of the tube to be deformed is less than the internal diameter of the tube, that the holding mandrel
(9) has a support means (10) for supporting the open end (16) of the tube and that at least three concentrically closable jaws (11) for producing the deformation are arranged around the holding mandrel (9), the surface (17) of the jaws, which is towards the tube wall, being adapted in the closed condition to the desired configuration in respect of deformation of the tube material.
12. Apparatus according to claim 11 characterised in that the forward region of the holding mandrel (9) which is adapted to the internal diameter of the tube extends at least over a third of the length of the tube.
13. Apparatus according to claim 11 characterised in that the support means (10) is a truncated cone which is adjustable on the holding mandrel (9) in the axial direction.
14. Apparatus according to claim 11 characterised in that the support means (1) is a spherical cup which is adjustable on the holding mandrel (9) in the axial direction.
15. Apparatus according to claim 11 characterised in that the holding mandrel (9) is provided with an ejector for throwing the tube body (1) off.
16. Apparatus according to claim 15 characterised in that the ejector comprises a bore (12) in the holding mandrel (9), which can be fed with compressed air.
17. Apparatus according to claim 11 characterised in that the jaws (11) are surrounded by a common closure ring (14) which is displaceable in the axial direction and which has a tapered internal wall (18) for simultaneously pressing the jaws (11) together.
18. Apparatus according to claim 17 characterised in that the jaws (11) are provided with an outside wall (19) corresponding to the tapered inside wall (18) of the ring (14).
19. Apparatus according to claim 11 characterised in that the surface (17) of the jaws (11), which is towards the wall of the tube, has two annular projections (20).
EP79810022A 1978-03-10 1979-03-05 Stackable tube body provided with a layer of dense material, method for producing such a tube body and apparatus for carrying out the method Expired EP0004253B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH262178A CH626302A5 (en) 1978-03-10 1978-03-10
CH2621/78 1978-03-10
CH1449/79 1979-02-14
CH144979A CH634761A5 (en) 1979-02-14 1979-02-14 Method and apparatus for deforming a tubular body

Publications (3)

Publication Number Publication Date
EP0004253A2 EP0004253A2 (en) 1979-09-19
EP0004253A3 EP0004253A3 (en) 1979-10-03
EP0004253B1 true EP0004253B1 (en) 1980-09-03

Family

ID=25687686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79810022A Expired EP0004253B1 (en) 1978-03-10 1979-03-05 Stackable tube body provided with a layer of dense material, method for producing such a tube body and apparatus for carrying out the method

Country Status (4)

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EP (1) EP0004253B1 (en)
AT (1) AT364642B (en)
DK (1) DK146358C (en)
NO (1) NO790803L (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3131666A1 (en) * 1981-08-11 1983-02-24 Ketels Tuben Vertriebs-Gesellschaft mbH, 2800 Bremen TUBE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877534A (en) * 1931-12-19 1932-09-13 Bond Mfg Corp Collapsible tube
FR1223759A (en) * 1959-05-05 1960-06-20 Flexible tube and apparatus for obtaining this tube
DE1938943C3 (en) * 1969-07-31 1974-05-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Cover cap for a sample vessel
DE2008885A1 (en) * 1970-02-26 1971-09-09 CF Spiess & Sohn, 6719 Kleinkarl bach Tube and device for manufacture
DE2447420A1 (en) * 1974-10-04 1976-04-15 Viw Verbundene Industriewerke TUBE BLANK SUITABLE FOR THE FORMATION OF A TUBE ROD, THE PROCESS FOR ITS PRODUCTION AND TUBE ROD FORMED FROM IT

Also Published As

Publication number Publication date
AT364642B (en) 1981-11-10
DK146358C (en) 1984-03-12
EP0004253A2 (en) 1979-09-19
DK98979A (en) 1979-09-11
ATA173879A (en) 1981-03-15
NO790803L (en) 1979-09-11
EP0004253A3 (en) 1979-10-03
DK146358B (en) 1983-09-19

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