DK146358B

DK146358B - STABLE TUBE BODY WITH A SECTION MATERIAL COATED SECTION, PROCEDURE FOR MANUFACTURING THE TUBE BODY, AND APPARATUS FOR CARRYING OUT THE PROCEDURE

Info

Publication number: DK146358B
Application number: DK098979AA
Authority: DK
Inventors: Werner Schwarz
Original assignee: Obrist & Co Ag H
Priority date: 1978-03-10
Filing date: 1979-03-09
Publication date: 1983-09-19
Also published as: EP0004253A3; EP0004253A2; DK98979A; AT364642B; NO790803L; ATA173879A; DK146358C; EP0004253B1

Description

i 146358in 146358

Opfindelsen angår et stabelbart, konisk tubelegeme, der på indersiden af den åbne påfyldningsende til tæt lukning af denne har et med et lag tætningsmateriale udstyret ringformet afsnit. Opfindelsen angår endvidere en fremgangsmåde 5 ved fremstilling af sådanne tubelegemer. Endelig angår opfindelsen et apparat til udførelse af fremgangsmåden.The invention relates to a stackable conical tube body which has on the inside of the open filling end for tight closure thereof an annular section equipped with a layer of sealing material. The invention further relates to a method 5 for producing such tubular bodies. Finally, the invention relates to an apparatus for carrying out the method.

Stabelbare tubelegemer af den nævnte art har den fordel, at de tillader særligt pladsbesparende og rationel pakning af tubelegemerne til forsendelse til påfyldningssted-10 et. Efter påfyldningen lukkes tubernes åbne påfyldningsende ved sammenfoldning af det med tætningsmateriale udstyrede afsnit.Stackable tube bodies of the kind mentioned have the advantage that they allow particularly space-saving and rational packing of the tube bodies for shipment to the filling site. After filling, the open filling end of the tubes is closed by folding the section equipped with sealing material.

Sådanne tuber kendes f.eks. fra DE offentliggørelsesskrift nr.Such tubes are known e.g. from DE publication no.

25 22 511, og tætningsmaterialet består i dette tilfælde af en 15 vokslignende masse. Når tætningsmaterialet består af et klæbe stof, opstår der ved stabling af tubelegemerne problemer ved, at de stablede tuber under ingen omstændigheder må komme i berøring med tætningsmaterialet.25 22 511, and in this case the sealing material consists of a 15 wax-like mass. When the sealing material consists of an adhesive, problems arise when stacking the tubular bodies in that the stacked tubes must under no circumstances come into contact with the sealing material.

Fra det tyske patentskrift nr. 2 009 692 kendes et konisk 20 tubelegeme, hvis åbne påfyldningsende har et udvidet afsnit med samme konisitet som tubevæggen, og tætningsmaterialelaget er påført dette afsnit, hvis diameter er valgt således, at tætningsmaterialelaget ikke kan komme i berøring med stabelens følgende tube. En mangel ved denne 25 udformning er det imidlertid, at tubevæggene kommer i direkte berøring med hinanden, når tubelegememe stables indskudt i hinanden, hvorved tuberne vil hæfte sig så stærkt til hinanden, at adskillelse af tuberne bliver vanskelig, og at der er risiko for beskadigelse af tubernes 30 allerede påtrykte overflader. En yderligere mangel ved den udvidede tubeende består i, at ved sammenfoldning af dette område i forhold til tubelegemet opstår der udad-ragende skarpe kanter, der nemt kan føre til beskadigelse af brugeren, og som derhos virker uheldigt udseendemæs- 146358 2 sigt. Det udvidede afsnit medfører også ved fremstillingen visse problemer, idet der ved den nødvendige stærke udvidelse nemt kan opstå langsgående ridser ved tubeenden.German Patent Specification No. 2 009 692 discloses a conical 20 tube body, the open filling end of which has an expanded section with the same conicity as the tube wall, and the sealing material layer is applied to this section, the diameter of which is chosen so that the sealing material layer cannot come into contact with the stack. the following tube. A disadvantage of this design, however, is that the tube walls come into direct contact with each other when the tube bodies are stacked in each other, whereby the tubes will adhere so strongly to each other that separation of the tubes becomes difficult and there is a risk of damage. of the surfaces already applied to the tubes 30. A further disadvantage of the enlarged tube end is that, when collapsing this area with respect to the tube body, outwardly sharp edges occur which can easily lead to damage to the user and which therewith appear to have an unfortunate appearance. The enlarged section also causes some problems in the manufacture, since longitudinal scratches can easily occur at the tube end with the necessary strong expansion.

Opfindelsens formål består navnlig i at afhjælpe manglerne 5 ved den kendte teknik og at anvise et stabelbart tubelegeme af den omhandlede art, der er nemt at fremstille, hvormed det er muligt at foretage en risikofri stabling, og hvormed der tillige opnås en forstærkning af tubens åbne påfyldningsende.The object of the invention is in particular to remedy the shortcomings 5 of the prior art and to provide a stackable tube body of the subject type which is easy to manufacture, with which it is possible to carry out a risk-free stacking and which also achieves a reinforcement of the open tube. loading end.

10 Dette er ifølge opfindelsen opnået ved, at der ved siden af det ringformede tætningsmaterialeafsnit findes mindst en mod tubens akse rettet materialedeformation, i hvis område den indvendige diameter er så meget mindre end den indvendige diameter af tætningsmaterialeafsnittets til-15 stødende endedel, at det kan hindre berøring mellem tætningsmaterialet og ydersiden af et inden i tubelegemet indskudt andet tubelegeme. Denne indad rettede materialedeformation beskytter altså det umiddelbart tilstødende tætningsmaterialeafsnit mod berøring med det indskudte 20 tubelegeme. Samtidig opnås den ved materialedeformationen, at tubevæggene ikke kan berøre hinanden direkte, således at tubernes overflade beskyttes mod beskadigelse, samt at den indbyrdes adskillelse af tuberne lettes.This is achieved according to the invention in that, next to the annular sealing material section, there is at least one material deformation directed at the axis of the tube, in which area the internal diameter is so much smaller than the inner diameter of the adjacent end portion of the sealing material that it can preventing contact between the sealing material and the outside of a second tube body inserted within the tube body. This inward material deformation thus protects the immediately adjacent sealing material portion from contact with the inserted tube body. At the same time, it is achieved by the material deformation that the tube walls cannot touch each other directly, so that the surface of the tubes is protected against damage and that the separation of the tubes is facilitated.

Med henblik på at hindre utilsigtet sammenpresning af tæt-25 ningsmaterialeafsnittet, kan den nævnte materialedeformation ifølge en udførelsesform for opfindelsen findes mellem tætningsmaterialeafsnittet og den åbne tubeende. Også i denne udførelsesform er tætningsmaterialeafsnittet beskyttet ved stabling af tuberne.In order to prevent inadvertent compression of the sealing material section, said material deformation according to one embodiment of the invention can be found between the sealing material section and the open tube end. Also in this embodiment, the sealing material section is protected by stacking the tubes.

30 Materialedeformationen kan ifølge en udførelsesform for opfindelsen være udformet som en ringformet sik. Denne udførelsesform har den fordel at være meget enkel, og at der opnås en forstærkning og afstivning af hele randpartiet 146358 3 ved tubens åbning.According to one embodiment of the invention, the material deformation may be formed as an annular sieve. This embodiment has the advantage of being very simple and that the entire edge portion 146358 is reinforced and stiffened at the opening of the tube.

Sikken kan ifølge en udførelsesform for opfindelsen have en bredde på mindst en millimeter. Dette har den fordel, at den indvendige diameter kan dimensioneres således, at 5 der mellem tubevæggene findes et tilstrækkeligt mellemrum, uden at sikken behøver at have en for lille radius. Sikkens dybde bør selvsagt vælges således, at materialedeformationen netop overstiger tykkelsen af tætningsmaterialelaget.According to one embodiment of the invention, the sieve can have a width of at least one millimeter. This has the advantage that the inside diameter can be dimensioned such that there is a sufficient gap between the tube walls without the sieve having a radius too small. The depth of the sieve should, of course, be chosen such that the material deformation just exceeds the thickness of the sealing material layer.

Dette gælder også, når sikken ikke har et halvrundt tvær-10 snit. Sikken kan nemlig f.eks. også have tilnærmelsesvis trapezformet tværsnit. Nogen risiko for ridsedannelse opstår ikke som følge af sikken, da der ved deformering indad ikke opstår strækning men opstukning af tubevæggens materiale.This is also true when the sieve does not have a half-round cross-10 cut. The sieve can, for example, also have approximately trapezoidal cross sections. No risk of scratching is created as a result of the sieve, as inward deformation does not result in stretching but the breaking up of the tube wall material.

15 Ifølge en anden udførelsesform for opfindelsen kan materialedeformationen bestå af to ringformede sikker, der er beliggende på begge sider af tætningsmaterialeafsnittet. Den anden sik bevirker en yderligere beskyttelse mod udefra virkende, radiale belastninger af tubevæggen.According to another embodiment of the invention, the material deformation may consist of two annular safes located on both sides of the sealing material section. The second sieve provides additional protection against external radial loads on the tube wall.

20 Tubelegemer af den omhandlede art bliver som regel fremstillet ved dybtrækning i en enkelt arbejdsgang. Teoretisk ville det være muligt også at foretage materialedeformeringen sammen med dybtrækningen. Med henblik på at opnå en fleksibel fremstillingsproces og på at kunne tilfredsstille særlige 25 ønsker fra kunderne, er det dog hensigtsmæssigt at adskille disse arbejdsprocesser og i visse tilfælde endog først foretage materialedeformeringen, efter at tætningsmaterialet er påført. Dette medfører dog visse problemer ved fabrikationen, idet tætningsmaterialelaget vanskeliggør opspæn-30 dingen, henholdsvis centreringen af tubelegemet. Således må f.eks. fremstilling af den nævnte materialedeformation ved trykrulning lades ude af betragtning, da det ikke er muligt at indskyde et egnet holdeorgan i tuben.20 Tube bodies of the kind in question are usually manufactured by deep drawing in a single operation. Theoretically, it would also be possible to do the material deformation together with the deep drawing. However, in order to achieve a flexible manufacturing process and to satisfy specific customer wishes, it is appropriate to separate these work processes and, in some cases, even do the material deformation only after the sealing material is applied. However, this causes certain problems in fabrication, as the sealing material layer makes the tensioning or centering of the tube body difficult. Thus, e.g. preparation of said material deformation by pressure rolling is disregarded since it is not possible to insert a suitable holding means into the tube.

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Det er derfor yderligere opfindelsens formål af anvise en fremgangsmåde ved fremstilling af et konisk tubelegeme af den omhandlede art af kolddeformerbart materiale, navnlig aluminium, hvorved det kan deformeres, uden at tuben der-5 ved beskadiges, og uden at et allerede påført lag tætningsmateriale vil hindre arbejdsprocessen. Dette er ifølge opfindelsen opnået ved, at der i et ved tubens ende beliggende vægområde frembringes en som en sik udformet, mod tubens akse rettet fordybning, ved at tubevæggen understøttes ved 10 opspænding på en sådan måde, at det område, hvor sikken skal dannes, holdes frit, og at væggen deformeres ved et ydre pres mod dette område.It is therefore further the object of the invention to provide a method of making a conical tube body of the subject type of cold-deformable material, in particular aluminum, whereby it can be deformed without damaging the tube, and without an already applied layer of sealing material. hinder the work process. This is achieved according to the invention in that in a wall area located at the end of the tube, a recess is formed as a sieve, directed towards the axis of the tube, by supporting the tube wall by clamping in such a way that the area where the sieve is to be formed. is kept free and the wall is deformed by external pressure against this area.

Som følge af denne opspænding af tuben, kan der foretages deformering af denne, uden at det ustabile og bøjelige tu-15 belegeme beskadiges, og der kan anvendes enkle organer til dannelse af den nævnte sik.Due to this clamping of the tube, it can be deformed without damaging the unstable and flexible tubing, and simple means may be used to form said sieve.

Endelig har opfindelsen til formål at anvise et apparat til udførelse af denne fremgangsmåde, som muliggør udformning af fordybninger i tubevæggen, når der allerede findes 20 et påført lag tætningsmateriale.Dette apparat er ifølge opfindelsen ejendommeligt ved, at det til fastholdelse af tubelegemet er udstyret med en dorn, hvis udvendige diameter, i hvert fald på den forreste del er tilpasset den koniske tubes indvendige diameter, og hvis udvendige diameter i den 25 del af tuben, der skal deformeres, er mindre end tubens indvendige diameter, at dornen har et organ til støtte for den åbne tubeende, og at der omkring dornen er anbragt mindst tre koncentriske, lukkelige kæber til dannelse af deformationen, og hvis mod tubevæggen vendende overflade i lukket 30 stilling er tilpasset materialedeformationens ønskede form.Finally, the invention has for its object to provide an apparatus for carrying out this method which permits the formation of recesses in the tube wall when there is already an applied layer of sealing material. This device according to the invention is peculiar in that it is equipped with a mandrel whose outer diameter is at least anterior to the inner diameter of the conical tube and whose outer diameter in the 25 portion of the tube to be deformed is smaller than the inner diameter of the mandrel; support for the open tube end, and at least three concentric closure jaws are arranged around the mandrel to form the deformation, and if the surface facing the tube wall in the closed position is adapted to the desired shape of the material deformation.

146358 5146358 5

Som følge af domens særlige udformning fastholdes tuben i dens forreste område med formsluttende anlæg, medens den i deformationens område ikke har anlæg mod domen.Due to the special design of the judgment, the tube is retained in its front area with the form-fitting system, while in the area of the deformation it does not hold against the judgment.

Derved hindres, at det allerede påførte tætningsmateri-5 alelag kan komme i berøring med og hæfte sig fast på dom en, Domens organ til støtte for den åbne tubeende bevirker en let udvidelse af den åbne ende, og de koncentriske kæber tillader udformning af en materialedeformation med en ønsket form, uden at det forholdsvis ustabile og bøje-10 lige tubelegeme derved beskadiges.This prevents the already applied sealing material layer from coming into contact with and adhering to the judgment, the body of the dome supporting the open end tube causes a slight expansion of the open end, and the concentric jaws allow the formation of a material deformation in a desired shape, without damaging the relatively unstable and flexible tubular body.

Støtteorganet kan ifølge en udførelsesform for opfindelsen være en på dornen aksialt forskydelig keglestub. Derved bibringes også et eventuelt let sammentrykket tubelegeme påny dets oprindelige koniske form. Støtteorganets ind-15 stillelighed på dornen bevirker, at der kan ske nøjagtig justering af udvidelsen. Denne udvidelse af tubeenden letter afskillelse af de stablede tuber.According to one embodiment of the invention, the support member may be a cone displaceable on the mandrel. Thereby, a possibly slightly compressed tube body is also imparted to its original conical shape. The adjustability of the support member on the mandrel ensures that the extension can be precisely adjusted. This extension of the tube end facilitates separation of the stacked tubes.

Kæberne kan ifølge en udførelsesform for opfindelsen være omgivet af en fælles lukkering, der er aksialt forskydelig, 20 og som er udformet med en konisk, indvendig vægflade til samtidig sammenpresning af kæberne. Herved sikres, at alle kæberne presses samtidig og med samme kraft mod tubevæggen. Endvidere kan ifølge en udførelsesform for opfindelsen kæberne være udformet med en til lukkeringens 25 koniske, indvendige vægflade svarende udvendig flade. Ved et passende valg af konusvinkelen kan herved kæbernes forskydningslængde bestemmes på en meget enkel måde. Endvidere betyder denne udformning, at der til betjening af kæberne kan anvendes i mekanisk henseende meget enkle 30 organer.According to one embodiment of the invention, the jaws may be surrounded by a joint closure which is axially slidable and which is formed with a conical internal wall surface for simultaneous compression of the jaws. This ensures that all the jaws are pressed simultaneously and with the same force against the tube wall. Furthermore, according to one embodiment of the invention, the jaws can be formed with an outer surface corresponding to the conical inner wall surface of the closure 25. By appropriate selection of the cone angle, the displacement length of the jaws can thus be determined in a very simple manner. Furthermore, this design means that for the operation of the jaws, very simple means may be used in mechanical terms.

Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 viser set fra siden to sammenstablede tubelegemer 6 146358 ifølge opfindelsen, fig. 2 viser i større målestok en del af et tubelegemes åbne ende, fig. 3 viser en anden udførelsesform med partielle ind-5 bugtninger, fig. 4 viser en udførelsesform med to ringformede sikker, og fig. 5 viser i snit en del af et apparat ifølge opfindelsen.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 is a side view of two stacked tube bodies 6 146358 according to the invention; FIG. 2 shows on a larger scale a portion of the open end of a tube body; FIG. 3 shows another embodiment with partial indentations; FIG. 4 shows an embodiment with two annular safe, and fig. 5 is a sectional view of part of an apparatus according to the invention.

10 Ifølge fig. 1 består et tubelegeme 1 af en konisk sidevæg 2, der fremad ender i en skulder 3, hvorpå er anbragt en hætte 3. Ved sammenstabling af sådanne tubelegemer ligger hætten 3 an mod skulderen 4 på den følgende tube. Ved tubelegemets åbne påfyldningsende findes et ringformet 15 tætningsmaterialeafsnit med en bredde A, og hvis tætnings materialelag 5 har en tykkelse E. Tætningsmaterialelaget kan f.eks. bestå af acrylharpiksdispersion eller af et andet egnet materiale. Efter tætningsmaterialelaget er tubens ende udformet med en indad rettet sik 6 med 20 en bredde B, og hvis indvendige diamater D er mindre end den indvendige diameter af tætningsmaterialelagets tilstødende endeområde 8. Som følge af denne dimensionering er det udelukket, at den i stabelen følgende, indskudte tube kan komme i berøring med tætningsmaterialelaget, u-25 anset hvilken konusvinkel der er valgt for tuberne. Sikken 6 har en dybde F, der rager udenfor tætningsmaterialelagets tykkelse E med F minus E.10 According to FIG. 1, a tube body 1 consists of a tapered side wall 2 which extends forwardly into a shoulder 3, on which is placed a cap 3. When stacking such tube bodies, the cap 3 abuts against the shoulder 4 on the following tube. At the open filling end of the tubular body, there is an annular 15 sealing material section having a width A, and whose sealing material layer 5 has a thickness E. The sealing material layer can e.g. consist of acrylic resin dispersion or other suitable material. After the sealing material layer, the end of the tube is formed with an inwardly directed sieve 6 having a width B and whose internal diameters D are smaller than the inner diameter of the adjacent end region of the sealing material layer 8. It is excluded that in the stacking, the following: inserted tube may come into contact with the sealing material layer, regardless of the cone angle chosen for the tubes. The sieve 6 has a depth F extending beyond the thickness E of the sealing material layer with F minus E.

Som følge af denne udformning støder den indskudte tube 1' dels mod skulderen 4 og dels mod sikken 6. For at lette 30 den efterfølgende adskillelse af tuberne må der være et mellemrum mellem sikken 6 ved diameteren D og den indskud- U6358 7 te tube. Størrelsen af mellemrummet mellem tubelegemerne 1 og 1' afhænger af konusvinklen, af stabeldelingen C og af sikkens 6 indvendige diameter D. Sikken 6 forstærker tubeenden således, at også ved sammenstablede tuber er en util-5 sigtet sammentrykning i tætningsmaterialeafsnittet A ikke mulig.As a result of this design, the inserted tube 1 'abuts against the shoulder 4 and partly on the socket 6. In order to facilitate the subsequent separation of the tubes, there must be a gap between the socket 6 at the diameter D and the insertion tube. The size of the gap between the tube bodies 1 and 1 'depends on the angle of the cone, the stacking part C and the inside diameter of the socket 6. The socket 6 reinforces the tube end so that even with stacked tubes an unintentional compression in the sealing material section A is not possible.

Også andre udførelsesformer er mulige indenfor opfindelsen. Fig. 3 viser således en anden udførelsesform, hvor materialedeformationen består af tre i samme plan lig-10 gende, partielle indbugtninger 7.Other embodiments are also possible within the invention. FIG. 3 thus shows another embodiment in which the material deformation consists of three similar partial indentations 7 in the same plane.

Materialedeformationen kan også være udformet som en trinlignende fordybning. Også tætningsmaterialeafsnittet A, bredden B af sikken 6 og stabeldelingen C kan ændres efter omstændighederne og efter tubernes udformning. Val-15 get af den rigtige tykkelse af tætningsmaterialelaget 5 vil uden vanskelighed kunne foretages af en fagmand.The material deformation may also be designed as a step-like depression. Also, the sealing material section A, the width B of the sieve 6 and the stacking section C can be changed according to the circumstances and according to the design of the tubes. The choice of the proper thickness of the sealing material layer 5 will be easily accomplished by one skilled in the art.

Fig. 5 viser et apparat ifølge opfindelsen, hvor tubelegemet placeres på en dorn 9, hvis forreste del er tilpasset tubens indvendige diameter. Derimod er dor-20 nens udvendige diameter i området ved deformationen henholdsvis i tætningsmaterialelagets 5 område mindre end tubens indvendige diameter, således at dornen ikke kommer i berøring med tætningsmaterialelaget. Tubelegemerne 1 bliver ved hjælp af ikke viste tilførselsorganer på-25 skudt domen lige til skulderen 4. Hætten 3 er da allerede påskruet tubelegemet. Domen 9 har i hele sin længde en boring 12, som trykluft kan føres igennem til udstødning af tubelegemet.FIG. 5 shows an apparatus according to the invention in which the tube body is placed on a mandrel 9, the front of which is adapted to the inside diameter of the tube. In contrast, the outer diameter of the mandrel in the region of the deformation and in the region of the sealing material layer 5, respectively, is smaller than the inner diameter of the tube, so that the mandrel does not come into contact with the sealing material layer. The tube bodies 1 are pushed to the shoulder by the delivery means (not shown) just to the shoulder 4. The cap 3 is then already screwed on the tube body. The dome 9 has throughout its length a bore 12 through which compressed air can be passed to eject the tube body.

Til støtte for og til udvidelse af den åbne tubeende 16 30 findes et støtteorgan 10, der fortrinsvis er udformet som en keglestub. For at støtteorganet kan tilpasses forskellige tubelaengder, er det anbragt forskydeligt på dornen.To support and extend the open tube end 16 30, a support member 10 is preferably formed as a cone stub. In order for the support member to be adapted to different tube lengths, it is slidably mounted on the mandrel.

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Ved påskydning af tubelegemet på dornen sker der ved hjælp af det koniske støtteorgan 10 en let udvidelse af de åbne tubeender 1. Støtteorganet indstilles således, at den åbne tubeende understøttes sikkert også i tilfælde af va-5 riationer i tubernes længde. Udvidelsen af tubeenden har dån fordel, at de stablede tuber lettere kan skilles fra hinanden.By pushing the tube body onto the mandrel, the tapered support member 10 slightly enlarges the open tube ends 1. The support member is adjusted so that the open tube end is safely supported even in the case of variations in the length of the tubes. The extension of the tube end has the advantage that the stacked tubes can be more easily separated.

Kæberne 11 er lejret i en ikke detaljeret vist styring 13, og de er radialt forskydelige. Det har vist sig sær-10 lig·hensigtsmæssigt, at der til deformeringen anvendes tre koncentrisk forskydelige kæber, men selvsagt vil det også være muligt at anvende flere kæber. Kæberne er omsluttet af en fælles lukkering 14, der omslutter alle kæberne 11 og er forbundet med en stødstang 15. Ringen 14 15 har en konisk indervæg 18, hvormed kæberne 11 kan sammenskydes i den med pilen A viste retning, hvilket sker ved aksial forskydning af ringen 14 ved hjælp af stangen 15 i den med pilen B viste retning. Når de har tilbagelagt forskydningslængden H, er de i aksial retning stive kæ-20 ber 11, der er lejret i styringen 13, presset sammen. Fig.The jaws 11 are housed in a guide 13 not shown in detail and are radially displaceable. It has been found particularly useful that three concentrically displaceable jaws be used for the deformation, but of course it will also be possible to use more jaws. The jaws are enclosed by a common closure ring 14 which encloses all the jaws 11 and is connected to a thrust bar 15. The ring 14 15 has a tapered inner wall 18 with which the jaws 11 can be displaced in the direction shown by arrow A, which occurs by axial displacement of the jaws. ring 14 by means of rod 15 in the direction shown by arrow B. When they have traveled the shear length H, the axial direction of the rigid jaws 11, which is mounted in the guide 13, is compressed. FIG.

5 viser over midterlinien apparatet i udgangsstilling og under midterlinien i stillingen med sammenpressede kæber.5 shows above the center line the apparatus in the starting position and below the center line in the position with compressed jaws.

Den for stangens 15 funktion nødvendige kraft tilvejebringes ved hjælp af ikke viste organer, der fortrinsvis 25 består af en hydraulisk eller pneumatisk cylinder. Udvendigt er kæberne fortrinsvis koniske. Derved bliver på en meget enkel måde en aksial kraftkomponent ved forskydning af ringen 14 ændret til en radial kraftkomponent. Selvsagt kan kæbernes funktion også tilvejebringes 30 på andre måder. F.eks. vil de enkelte kæber kunne bevæges ved hjælp af tandstænger og keglehjul.The force required for the function of the rod 15 is provided by means not shown, which preferably consists of a hydraulic or pneumatic cylinder. Externally, the jaws are preferably tapered. Thereby, in a very simple manner, an axial force component is shifted by a ring 14 to a radial force component. Of course, the function of the jaws can also be provided in other ways. Eg. the individual jaws will be able to move with the help of tooth rods and cone wheels.

Kæbernes mod tubelegemet vendende flader 17 er udformet med fremspring 20 til udformning af sikken i tubevæggen. Fremspringene kan have enhver ønsket form. Heller ikke 35 efter dannelsen af sikken berører tubevæggen i dette om- 146358 9 råde på noget sted dornen 9·The faces 17 of the jaws facing the tube body are formed with projections 20 for forming the sieve in the tube wall. The projections can be of any desired shape. Also, after forming the sieve, the tube wall in this area does not touch the mandrel 9 in any area.

Fremgangsmåden og apparatet ifølge opfindelsen tillader en radionel og fleksibel fremstilling af koniske tubelegemer af den omhandlede art. Når apparatet skal anvendes 5 til andre tubedimensioner, skal kun dornen 9 henholdsvis kæberne 11 udskiftes. Alt efter arten og beskaffenheden af tætningsmaterialelaget 5 kan der anvendes kæber med forskellig overflade 17.The method and apparatus according to the invention allow for a radial and flexible production of tapered tubular bodies of the kind in question. When the apparatus is to be used 5 for other tube dimensions, only the mandrel 9 and the jaws 11, respectively, must be replaced. Depending on the nature and nature of the sealing material layer 5, jaws of different surface 17 can be used.

Claims

Patent Claims:

1. Stackable tapered tube body having on the inside of the open filling end for tight closure thereof an annular portion with a sealing material, characterized in that there is at least one mate directed towards the axis of the tube (5) ridge deformation (6) in whose area the inner diameter is so much smaller than the inner diameter of the adjacent end portion of the sealing material portion that it can prevent contact between the sealing material and the outer side of a second tube body inserted within the tube body.

Tube body according to claim 1, characterized in that the material deformation exists between the sealing material section and the open tube end.

Tube body according to claim 1 or 2, characterized in that the material deformation is formed as an annular sieve.

Tube body according to claim 3, characterized in that the annular screen has a width of at least one millimeter.

Tube body according to claim 1 or 2, characterized in that the material deformation consists of at least two partial indentations in the same plane.

Tube body according to claim 3, characterized in that the material deformation consists of two annular secure 25 located on both sides of the sealing material section (5).

Process of producing a tapered tube body according to claim 1, of cold-deformable material, in particular aluminum U635S ninium, characterized in that in a wood. the wall area of the end of the tube is formed as a sieve, directed towards the axis of the tube, by supporting the tube wall by tensioning in such a way that the area where the sieve is to be formed is kept free and the wall is deformed by an outer surface. pressure against this area.

Method according to claim 7, characterized in that the tube (1) is first fixed to at least two clamping sites, one of which is the inner wall 10 of the shoulder portion (4) and / or the immediately adjacent tube wall, at least one of which corresponds approximately to the inside diameter of the tube. the tube centering retaining mandrel (9) is disposed and the second clamping point is the open tube end (1'6) which is supported both radially and longitudinally of the tube.

Method according to claim 8, characterized in that the open tube end (16) is expanded at the second clamping site.

Method according to claim 7, characterized in that the tube (1) is clamped in the area to be deformed, 20 and that the deformation occurs simultaneously with the clamping.

Apparatus for carrying out the method according to claim 7, characterized in that it is equipped with a mandrel (9), the outer diameter of which is at least on the front part, adapted to hold the inner diameter of the conical tube, and if the outside diameter of the portion of the tube to be deformed is smaller than the inside diameter of the tube, that the mandrel has a member (10) to support the open tube end (16) and that at least three concentric closures are arranged around the mandrel; - 30 straight jaws (11) to form the deformation, and if the surface (17) facing the tube wall in closed position is adapted to the desired shape of the material deformation.