EP0004253B1 - Corps de tube empilable muni d'une couche de matière d'étanchéité, procédé et appareil pour la fabrication d'un tel corps de tube - Google Patents

Corps de tube empilable muni d'une couche de matière d'étanchéité, procédé et appareil pour la fabrication d'un tel corps de tube 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
Authority
EP
European Patent Office
Prior art keywords
tube
tube body
corrugation
jaws
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79810022A
Other languages
German (de)
English (en)
Other versions
EP0004253A2 (fr
EP0004253A3 (en
Inventor
Werner Schwarz
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.)
H OBRIST AND CO AG
Original Assignee
H OBRIST AND CO AG
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
Priority claimed from CH262178A external-priority patent/CH626302A5/de
Priority claimed from CH144979A external-priority patent/CH634761A5/de
Application filed by H OBRIST AND CO AG filed Critical H OBRIST AND CO AG
Publication of EP0004253A2 publication Critical patent/EP0004253A2/fr
Publication of EP0004253A3 publication Critical patent/EP0004253A3/xx
Application granted granted Critical
Publication of EP0004253B1 publication Critical patent/EP0004253B1/fr
Expired legal-status Critical Current

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Classifications

    • 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.

Landscapes

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

Claims (20)

1. Corps de tube conique emboîtable (1) dont l'extrémité ouverte (16) présente sur sa face intérieure, pour permettre de le fermer de manière étanche, une section annulaire portant une couche de matière d'étanchéité, caractérisé en ce que le corps du tube présente, à proximité de la couche de matière d'étanchéité (5), pour protéger celle-ci pendant l'emboîtement, au moins, une déformation (6) orientée vers l'axe du tube, et en ce que son diamètre intérieur, dans la région de la déformation (6), est plus petit que le diamètre intérieur de la région d'extrémité de la déformation (6), voisine de ladite couche de matière d'étanchéité (5).
2. Corps de tube selon la revendication 1, caractérisé en ce que la déformation (6) est disposée entre la couche de matière d'étanchéité (5) et l'extrémité ouverte (16) du tube.
3. Corps de tube selon les revendications 1 et 2, caractérisé en ce que la déformation (6) est annulaire.
4. Corps de tube selon la revendication 3, caractérisé en ce que la largeur de la déformation annulaire est d'au moins un millimètre.
5. Corps de tube selon les revendications 1 et 2, caractérisé en ce qu la déformation (6) se compose d'au moins deux renforcements partiels situés dans un même plan.
B7 Corps de tube selon Îâ revendication 3, caractérisé en ce qu'une déformation (6) est disposée de chaque côté de la section (5) comportant la couche de matière d'étanchéité.
7. Procédé pour produire des renforcements (6) orientés vers l'axe, dans une paroi d'un corps de tube conique (1) voisine de l'extrémité de celui-ci, en une matière déformable à froid, en particulier en aluminium, comprenant une enveloppe (2) ayant une extrémité ouverte (16) et un épaulement (4), ainsi qu'une extrémité pouvant être fermée, caractérisé en ce que le tube (1) est serré de l'extérieur, dans la région devant être déformée, pratiquement sur tout son pourtour et en ce qu'on déforme, au moins, une section dudit pourtour.
8. Procédé selon la revendication 7 caractérisé en ce qu'on fixe d'abord le tube à deux endroits de serrage, le premier endroit de serrage étant la paroi intérieure de l'épaulement (4) et/ôu la paroi immédiatement adjacente du tube, où est montée une broche de support (9) correspondant approximativement au diamètre intérieur du tube et qui assure le centrage de celui-ci et en ce que le second endroit de serrage est l'extrémité ouverte (16) du tube, laquelle est soutenue à la fois radialement et dans le sens de la longueur du tube.
9. Procédé selon la revendication 8, caractérisé en ce qu'on élargit l'extrémité ouverte (16) du tube au niveau du second endroit de serrage.
10. Procédé selon la revendication 7, caractérisé en ce qu'on serre et on déforme simultanément la région du tube (1) devant être déformée.
11. Dispositif pour déformer un corps de tube conique (1) afin de produire dans l'enveloppe (2) de celui-ci un renforcement (6) orienté vers l'axe, caractérisé en ce qu'il comprend une broche de support (9) pour tenir le corps (1) du tube, dont le diamètre extérieur correspond, au moins dans la région antérieure, au diamètre intérieur du tube conique et dont le diamètre extérieur, dans la région de la section du tube devant être déformée, est plus petit que le diamètre intérieur du tube, en ce que la broche de support comporte, pour soutenir l'extrémité ouverte (16) du tube, un dispositif de soutien (10) et en ce que, autour de la broche de support (9) sont disposées, au moins, trois mâchoires concentriques (11 pouvant se fermer pour produire la déformation, et dont la surface (17) orientée vers la paroi du tube présente, quand les mâchoires sont fermées, une configuration correspondant à la déformation désirée.
12. Dispositif selon la revendication 11, caractérisé en ce que la région antérieure de la broche de support (9), qui est adaptée au diamètre intérieur du tube, s'étend sur au moins un tiers de la longueur de celui-ci.
13. Dispositif selon la revendication 11, caractérisé en ce que le dispositif de soutien (10) est constitué par un tronc de cône réglable dans le sens axial sur la broche de support (9).
14. Dispositif selon la revendication 11, caractérisé en ce que le dispositif de soutien (10) est une calotte sphérique réglable dans le sens axial sur la broche de support (9).
15. Dispositif selon la revendication 11,. caractérisé en ce que la broche de support (9) est pourvue d'un dispositif pour éjecter le corps (1) du tube.
16. Dispositif selon la revendication 15, caractérisé en ce que le dispositif d'éjection est constitué par un canal (12) percé dans la broche de support (9) et pouvant être alimenté en air comprimé.
17. Dispositif selon la revendication 11, caractérisé en ce que les mâchoires (11) sont entourées par un anneau de fermeture commun (14) pouvant être déplacé dans le sens axial et qui présente une paroi intérieure conique (18) pour serrer simultanément les mâchoires (11).
18. Dispositif selon la revendication 17, caractérisé en ce que les mâchoires (11) comportent une paroi extérieure (19) dont la forme correspond à la forme de la paroi intérieure conique (18) de l'anneau de fermeture (14).
19. Dispositif selon la revendication 11, caractérisé en ce que la surface (17) des mâchoires (11) qui est en regard de la paroi du tube présente deux parties saillantes annulaires (20).
EP79810022A 1978-03-10 1979-03-05 Corps de tube empilable muni d'une couche de matière d'étanchéité, procédé et appareil pour la fabrication d'un tel corps de tube Expired EP0004253B1 (fr)

Applications Claiming Priority (4)

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

Publications (3)

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

Family

ID=25687686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79810022A Expired EP0004253B1 (fr) 1978-03-10 1979-03-05 Corps de tube empilable muni d'une couche de matière d'étanchéité, procédé et appareil pour la fabrication d'un tel corps de tube

Country Status (4)

Country Link
EP (1) EP0004253B1 (fr)
AT (1) AT364642B (fr)
DK (1) DK146358C (fr)
NO (1) NO790803L (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3131666A1 (de) * 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 (fr) * 1959-05-05 1960-06-20 Tube souple et appareillage pour l'obtention de ce tube
DE1938943C3 (de) * 1969-07-31 1974-05-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Abdeckkappe für ein Probengefäß
DE2008885A1 (de) * 1970-02-26 1971-09-09 CF Spiess & Sohn, 6719 Kleinkarl bach Tube und Vorrichtung zur Herstellung
DE2447420A1 (de) * 1974-10-04 1976-04-15 Viw Verbundene Industriewerke Zur bildung einer tubenstange geeigneter tubenrohling, verfahren zu seiner herstellung und aus ihm gebildete tubenstange

Also Published As

Publication number Publication date
EP0004253A2 (fr) 1979-09-19
DK98979A (da) 1979-09-11
DK146358B (da) 1983-09-19
ATA173879A (de) 1981-03-15
NO790803L (no) 1979-09-11
DK146358C (da) 1984-03-12
EP0004253A3 (en) 1979-10-03
AT364642B (de) 1981-11-10

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