EP0510291B2 - Méthode et dispositif pour la manufacture de boítes filetées en aluminium - Google Patents

Méthode et dispositif pour la manufacture de boítes filetées en aluminium Download PDF

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Publication number
EP0510291B2
EP0510291B2 EP91810599A EP91810599A EP0510291B2 EP 0510291 B2 EP0510291 B2 EP 0510291B2 EP 91810599 A EP91810599 A EP 91810599A EP 91810599 A EP91810599 A EP 91810599A EP 0510291 B2 EP0510291 B2 EP 0510291B2
Authority
EP
European Patent Office
Prior art keywords
thread
neck
rolling
tools
roll
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 - Lifetime
Application number
EP91810599A
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German (de)
English (en)
Other versions
EP0510291A1 (fr
EP0510291B1 (fr
Inventor
Thomas Eugen Nussbaum-Pogacnik
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.)
NUSSBAUM & GUHL AG
Original Assignee
Nussbaum & Guhl 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
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Publication of EP0510291B1 publication Critical patent/EP0510291B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction
    • B65D1/0246—Closure retaining means, e.g. beads, screw-threads
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations

Definitions

  • the invention relates to a method and a device according to the preambles of the corresponding independent claims for the production of Aluminum cans with threads, especially deep-drawn, deep-drawn and stretched or extruded, aluminum cans painted inside and out with bottle thread.
  • aluminum is a good and cheap recyclable packaging material, would be it makes sense and desirable if made from aluminum containers could be on the like on plastic or glass bottles for example screwed on a hand pump with a riser pipe or a screw cap could be.
  • the aluminum container could be filled with, for example the screw cap come on the market.
  • the consumer the pump, which would be designed for multiple use, could simply be Screw the aluminum container on and off and the container without Recycle or refill foreign material.
  • To this Purposes would be aluminum cans with appropriate threads, advantageously standardized threads necessary.
  • the task is therefore to demonstrate a method and a device to create with those on the inside and externally painted aluminum cans thread, especially standardized thread, can be attached. It is particularly important that the paint, especially the inner varnish is not injured by attaching the thread will, because in the above-described task of such a can Internal threads are in contact with the contents of the can.
  • Procedure and Device are said to be in known production lines for the manufacture of deep-drawn, deep-drawn and ironed or extruded, lacquered Aluminum cans can be integrated, i.e. the thread must be made can be in the same setup in which the other work steps like pulling in the neck, cutting the can to length, etc. in a cycle time of approx.
  • the cans should be after the application the thread does not need to be cleaned, that is, process and device must do without the addition of lubricant or that a lubricant is used that does not contain the contents of the can or Appearance of the can impaired.
  • the thread is made by a rolling on the outer neck side Tool and a quasi stationary one that supports the can material from the inside Tool created on the inside of the neck.
  • the two tools work so positively controlled that there is slippage between the neck and the tool arises. This can largely prevent the neck material dammed up in front of the tools and in the direction of movement of the tools is shifted, which lead to oval threads and the paint in would claim and damage to a great extent.
  • Figure 1 shows the basic method steps of the inventive method.
  • the process is shown as a process block diagram and below it schematically the shape changes produced by the individual process steps on the can, namely as a top view and as a longitudinal section through the neck part of the can.
  • A painted inside and out and possibly printed, as long as it have a cylindrical shape.
  • the paints used are, for example Polyester or epoxy phenolic lacquers. You are going for increased flexibility, for increased adhesion and for better sliding properties with one or several additives that the expert as plasticizers, and Lubricants are known.
  • the devices used for painting correspond to known such devices with which the Spraying the interior paint, the exterior paint with a corresponding roller is applied. After painting, the paints are dried accordingly and polymerized.
  • the cans are placed on a turntable stretched, by gradually turning them into the area of successive Tools are guided, which are mounted on a tool plate are.
  • a corresponding device is for example in the CH patent 394'998 / 65 (Lechner) and is assumed to be known.
  • each can is drawn in in stages, the two process steps depending on the diameter of the can, depending on the desired can shape and depending on the material, consisting of different numbers of effective drawing-in steps with different tools.
  • the first time B is pulled in the can has a narrowing shoulder and a substantially cylindrical first neck piece 10
  • the second time it is pulled in C a second, narrower, essentially cylindrical neck piece 20 is connected to the first neck piece 10.
  • the outside diameter d 1 of the first neck piece 10 essentially corresponds to the outside diameter of the thread to be created
  • the outside diameter d 2 of the second narrower neck piece 20 is slightly smaller than the core diameter d 3 of the thread to be created.
  • the shape of the retracted shoulder is for the inventive method Not relevant.
  • Procedures and tools for pulling in aluminum cans are the same Known specialist. He can also use it for feeding to the one described Adapt the neck shape so that it is not described here Need to become.
  • a thread 30 is rolled up on the first neck piece 10 or on the part of the first neck piece 10 facing the second neck piece 20.
  • the thread is produced by a thread roll rolling around the outer circumference of the first neck piece 10, which is pressed against a quasi-stationary thread template in the interior of the neck. The thread is therefore pressed inwards from the outside of the neck so that the outside diameter of the finished rolled thread corresponds to the original neck diameter d 1 .
  • Its core diameter d 3 is a little larger than the outer diameter d 2 of the second neck piece 20.
  • the thread runs against the second neck piece 20, that is, it extends not to the edge of the neck. This prevents the neck edge deformed by the thread rolling from their exactly circular cylindrical shape becomes.
  • the can neck is cut to length, for example immediately above the upper outlet of the thread.
  • the connection between the neck edge and the pump connection must be tight.
  • the type of seal used can be advantageous to the face of the can neck straight or slightly crooked. Methods and devices to cut can necks are known and must therefore not be described here.
  • Figures 2a and b now show a top view in detail of the method and the tools that are used to roll the thread.
  • Figure 2a shows the tools before the thread rolling process, Figure 2b during the thread rolling process.
  • annular end face 21 of the second neck piece 20 with the outside diameter d 2 and the first neck piece 10 with the outside diameter d 1 are shown.
  • an essentially cylindrical or slightly frustoconical thread template 40 is inserted into the doser neck.
  • the largest diameter of the template is such that it can be inserted through the second neck piece 20 without difficulty.
  • the template On its side surface, the template carries a slightly distorted, negative image 41 of the thread to be rolled, which is indicated by dashed lines in this top view.
  • the can neck and the template are arranged coaxially, that is, their axes of rotation S and T coincide.
  • a thread form formed as spiral around the roll pulling bead 51
  • Thread roll spaced from the neck so that it does not touch it.
  • the template 40 and the Thread roll 50 by shifting their axes T and U against each other moves that the template 40 where the thread roll 50 outside is positioned, touches the inner surface of the first neck piece and the Thread form 51 of the thread roll 50 around the thread depth of the roll Thread is pressed into the neck material.
  • the thread roll 50 rolled on the neck and thus coordinates the axis of rotation the template rotated about the axis of rotation of the can so that the template always rests against the neck and supports the neck material where the thread roll just rolls.
  • the two tools are at least moved once around the can neck and created the thread.
  • the template 40 and thread roll 50 brought back into the position described for the insertion (Fig. 2a) and axially away from the can.
  • the thread roll 50 When the thread rolls, the thread roll 50 is positively controlled in this way unrolled that the circumferential distance rolled on the roll is greater than that circumferential stretch rolled on the neck. Between thread roll and neck This creates a slip, so that the thread roll is in one Direction rolls over the neck circumference, but always in the opposite direction Direction slips on the neck surface. Through this Slip through which a force counteracts the direction of movement of the thread roll 50 arises on the neck material, the role is prevented Neck material in front of it and shifted in the unwinding direction.
  • FIGS. 3a and 3b show, corresponding to FIGS . 2a and 2b, the tools used for the thread rolling process before (FIG. 3a) and during (FIG. 3b) the thread rolling process, namely as a section along the axis of rotation of the can, with only one side of the can neck is shown.
  • the threads 41 of the thread template need only correspond to the shape of the finished thread in depth and pitch, but should not have any sharp edges where they come into contact with the deformed inner surface.
  • the thread shape 51 of the thread roll 50 must correspond in shape to the shape of the thread to be created.
  • the thread template 40 is advantageously designed such that it not only supports the inner surface of the first neck piece 10, but also at least partially the inner surface of the second neck piece 20, although no thread is rolled thereon.
  • FIG. 4 schematically shows the parts of a device for thread rolling on cans relevant to the invention in an exemplary embodiment.
  • the figure is a section along the axis of rotation S of the can.
  • the two neck pieces 10 and 20 are visible from the can.
  • the thread template 40 and the thread roller 50 are in a position which corresponds to their position in FIGS. 2b and 3b.
  • the axis T of the template 40 is not on the axis of rotation S of the can, the thread roller 50 presses into the neck material.
  • the means 60 are shown, by means of which the slip between the thread roll 50 and the can neck is produced. These are around a ring gear 61 which is attached to the shaft 42 of the template 40, and a second ring gear 62 running in this ring gear 61, which the thread roll 50 is attached. Now the axis U of the thread roll 50 moves about the axis T of the template 40, the thread roll rolls by the toothed drive 60 from the can neck under positive control. Since the Rolling radius r of the thread roll 50 on the can neck is smaller than that Rolling radius R of the ring gear 61 arises between the thread roll 50 and Can slip in such a way that the thread roll 50 on the Neck material slips against its direction of drainage.
  • the drives for the axial movement of the are not shown in the figure Device parts before and after the effective thread rolling process and for the rotational movement of the thread roll 50 around the can neck and with it coupled circular movement of the axis T.
  • the axial movement advantageously the clocked movement of the tool plate, on the too the tools for the other process steps are assembled, used.
  • the circular movement of the thread roll is, for example, with a belt drive driven.
  • the coupling of the movement of the thread roll 50 and the axis T of the Template 40 and the control of the relative movement of the two axes T and U before and after the effective thread rolling process can be done by appropriate asymmetrical wedge arrangements can be realized, the relative movement of the two axes by a relative movement in the axial Direction of these wedge arrangements is realized.
  • the movement of the axis T about the axis S can be realized in such a way that the axis T describes a cylinder jacket around the axis S, or that the axis T describes a cone about the axis S.
  • the template 40 In the event of cylinder movement the template 40 must be cylindrical, in the event of taper movement the template 40 must be frustoconical, with in the Can pointing tapered end be designed.
  • FIG. 5 shows a can closed with a hand pump 70, to which a thread was attached using the method according to the invention.
  • the thread can correspond to any standard for such threads, for example the Euronorm. It can be seen that threads which are produced by the method according to the invention have an accuracy of approximately ⁇ 0.1 mm, an accuracy which far exceeds the accuracy of corresponding plastic or glass threads. For this reason, it is also not necessary, as shown in FIG. 5, to improve the centering of the screwed-on pump by means of a corresponding recess on the end of the can neck facing the shoulder.
  • the shape of the can base is not relevant for the method according to the invention.
  • the can shown has, for example, an inwardly curved base.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Chemical Treatment Of Metals (AREA)

Claims (8)

  1. Procédé de fabrication de boítes en aluminium munies d'un filetage et peintes à l'intérieure et à l'extérieure, selon quel procédé on fabrique une boíte cylindrique par le procédé d'emboutissage, d'emboutissage-étirage ou d'extrusion, suivi de la peinture de la boíte cylindrique et le rétrécissement du col, l'application du filetage à l'aide d'un calibre de filetage intérieur (40) et d'un rouleau de filetage extérieur (50) et la découpe et selon quel procédé les opérations de rétrécissement, d'application du filetage et de découpe du col sont effectuées au cours d'une même phase de serrage de la boíte, caractérisé en ce que lors de l'applicage du filetage, les outillages (40, 50) sont guidés de manière à produire entre les outillages et la matière de la boíte un glissement prédéterminé par glissage des outillages (40, 50) sur la matière de la boíte, l'outillage intérieur glissant dans le sens de l'avancement des outils (40, 50) et l'outillage extérieur (50) glissant dans le sens opposé par rapport à l'avancement des outillage sur la matière de la boíte.
  2. Procédé selon la revendication 1, caractérisé en ce que les peintures utilisées pour peindre les boítes sont modifiées, par des additifs, de sorte qu'elles présentent une adhérence et une souplesse supérieures et des caractéristiques de glissement améliorées.
  3. Procédé selon la revendication 2, caractérisé en ce que lesdits additifs sont des catalyseurs, des adoucisseurs et/ou des lubrifiants.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la boíte est rétrécie, avant l'application du filetage, pour être munie au moins d'un col (20) sensiblement cylindrique, et en ce que le diamètre extérieur dudit col correspond sensiblement au diamètre du noyau du filetage à appliquer.
  5. Dispositif d'application d'un filetage sur des boítes peintes fabriquées en aluminium selon le procédé, conformément à l'une quelconque des revendications 1 à 4, en ce qu'il présente un calibre de filetage (40) constituant un appui intérieur du col et un rouleau de filetage (50) utilisé pour appliquer le filetage sur la face extérieure du col caractérisé en ce qu'il présente en addition des moyens de commande coordonnant les mouvements du calibre (40) et celui du rouleau de filetage (50) en déroulant les mouvements des outillages, de la manières à produire le glissement demandé entre le col de la boíte et les outillages.
  6. Dispositif selon la revendication 5, caractérisé en ce que les moyens de commande produisant un glissement comprennent une couronne dentée (61) montée sur l'arbre (42) du calibre (40) et une couronne dentée (62) montée sur le rouleau de filetage (50), et en ce que le cercle de roulement de la couronne dentée (61) montée sur l'arbre (42) du calibre (40) est supérieur à celui du rouleau de filetage (50) appliqué sur le col de la boíte.
  7. Dispositif selon la revendication 6, caractérisé en ce que le rapport entre le rayon (R) du cercle de roulement de la couronne dentée (61) et le rayon de roulement (r) du rouleau de filetage (50) appliqué sur le col de la boíte est choisi de sorte que R/r≧1,1.
  8. Dispositif selon l'une des revendications 5 à 7, caractérisé en ce que les moyens de commande, utilisés pour coordonner le mouvement radial du calibre (40) et du rouleau de filetage (50), présentent des systèmes de calage, d'une part, et des moyens à mouvement relatif entre ces systèmes de calage dans le sens axial, d'autre part.
EP91810599A 1991-04-17 1991-07-26 Méthode et dispositif pour la manufacture de boítes filetées en aluminium Expired - Lifetime EP0510291B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1149/91 1991-04-17
CH114991 1991-04-17
CH114991 1991-04-17

Publications (3)

Publication Number Publication Date
EP0510291A1 EP0510291A1 (fr) 1992-10-28
EP0510291B1 EP0510291B1 (fr) 1995-03-08
EP0510291B2 true EP0510291B2 (fr) 2000-04-26

Family

ID=4203635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810599A Expired - Lifetime EP0510291B2 (fr) 1991-04-17 1991-07-26 Méthode et dispositif pour la manufacture de boítes filetées en aluminium

Country Status (6)

Country Link
US (1) US5293765A (fr)
EP (1) EP0510291B2 (fr)
JP (1) JP3375661B2 (fr)
AT (1) ATE119441T1 (fr)
DE (1) DE59104891D1 (fr)
ES (1) ES2073722T5 (fr)

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Also Published As

Publication number Publication date
EP0510291A1 (fr) 1992-10-28
DE59104891D1 (de) 1995-04-13
EP0510291B1 (fr) 1995-03-08
JPH05229545A (ja) 1993-09-07
US5293765A (en) 1994-03-15
JP3375661B2 (ja) 2003-02-10
ES2073722T3 (es) 1995-08-16
ATE119441T1 (de) 1995-03-15
ES2073722T5 (es) 2000-11-01

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