EP1531017A1 - Vorrichtung und Verfahren zum Umformen von Behältern - Google Patents

Vorrichtung und Verfahren zum Umformen von Behältern Download PDF

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Publication number
EP1531017A1
EP1531017A1 EP03380261A EP03380261A EP1531017A1 EP 1531017 A1 EP1531017 A1 EP 1531017A1 EP 03380261 A EP03380261 A EP 03380261A EP 03380261 A EP03380261 A EP 03380261A EP 1531017 A1 EP1531017 A1 EP 1531017A1
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EP
European Patent Office
Prior art keywords
tool
shifting
rack table
regard
cylinders
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03380261A
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English (en)
French (fr)
Inventor
Alvaro Bilbao Moran
Santiago Garcia Campo
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.)
Envases Metalurgicos de Alava SA
Original Assignee
Envases Metalurgicos de Alava SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Envases Metalurgicos de Alava SA filed Critical Envases Metalurgicos de Alava SA
Priority to EP03380261A priority Critical patent/EP1531017A1/de
Publication of EP1531017A1 publication Critical patent/EP1531017A1/de
Withdrawn legal-status Critical Current

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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
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins

Definitions

  • the invention is related to machines for shaping metal containers, specifically, to automatic machines receiving metal cylinders with one open end and which form or shape said cylinders by means of one or several shaping tools or instruments; this type of machines are known as necking machines.
  • a container can be obtained constituted of a single piece of metal, without weldings, to which an element for dispensing the contents is attached, such as a nozzle, generally manufactured in a metal, plastic material or the like.
  • FIGS 1A and 1B schematically show a known system in which the shaping of the open part of the container is carried out in several successive steps, carried out sequentially.
  • the system comprises a necking machine comprising a turntable 1 receiving, from a drum or feed mechanism 200, metal cylinders 100 having, at least, one open end.
  • the turntable 1 comprises securing means 11 for securing the cylinders 100 received; said securing means 11 can consist of grips, clips or the like.
  • the turntable 1 is arranged such that it can rotate around a spin shaft 12 parallel to the longitudinal axis of the cylinders 100 secured by the securing means 11.
  • each cylinder 100 goes, step-wise, from a loading position 31, which is the position in which the turntable receives the cylinder, going through a series of shaping positions 32 for shaping the open part of the container, in which the neck of the container is formed, until an unloading position 33 in which the metal cylinder (now with the neck formed) is unloaded by an unloading mechanism 201 and moved to a conveyor.
  • the machine comprises a tool-rack table 2 with forward and backward movement which a plurality of shaping tools 21 are fixed to which, when applied on the open end of a cylinder 100, modify the profile or shape of said end by means of deforming the metal in said area of the cylinder.
  • the turntable 1 and the tool-rack table 2 are opposite to one another and the tools 21 are coupled or fixed to the tool-rack table opposite the shaping positions 32 in which the cylinders 100 on the turntable 1 are located.
  • Each tool 21 is selected such that, when applied on the cylinder which is in the shaping position 32 opposite to the tool, it deforms or shapes the open end of the cylinder by a measurement corresponding to part of the total deformation or shaping to which the open end of the cylinder must be subjected during the shaping process, between the loading position 31 and unloading position 33.
  • the axial movement of the tool-rack table 2 is synchronized with the rotational movement of the turntable 1, such that the turntable 1 intermittently rotates, moving the cylinders from one shaping position 32 to the next shaping position, and after each step, i.e. each time the cylinders reach a new shaping position, the tool-rack table 2 shifts a distance X towards the cylinders 100, such that the tools 21 come into contact with the cylinders 100 and carry out their corresponding parts of the total shaping of the open parts of the cylinders.
  • the axial movement and rotational movement are carried out step-wise and in a sequential and synchronized manner, such that the neck of the container is successively formed or shaped along the run of the cylinder from the loading position 31 to the unloading position 33.
  • the rotational movements of the turntable and the axial movements (forwards and backwards) of the tool-rack table are coordinated with the feed mechanism 200 and with the unloading mechanism 201 such that in each work cycle (corresponding to the shifting of a cylinder 100 from one shaping position 32 to the next), the drum 1 is fed with a cylinder in the loading position 31, and a cylinder is unloaded (with its open end shaped) in the unloaded position 33, from which the cylinders (now with their necks shaped and finished) are led to a packaging machine and palletizer in order to be sent to the recipient.
  • the cylinder has gone from the loading position 31 to the unloading position 33, the cylinder has been shaped by all the tools, and the open end has a neck with the desired features.
  • EP-A-0 275 369 discloses a system substantially according to these features. Another type of container shaping machine is disclosed in US-A-3,913,366.
  • the axial movement of the tool-rack table 2 has a fixed forward and backward run X, therefore the length of the neck formed on the cylinder is related to this run and limited by the synchronization of the movements of the respective turntable and tool-rack table.
  • Figures 2A and 2B schematically show the turntable 1 and the tool-rack table 2 in a conventional machine, before and after an axial shifting of the tool-rack table.
  • Figure 2A shows part of the turntable 1 with the securing means 11 securing a "virgin" cylinder 100, i.e. with the open end yet to be shaped.
  • the tool-rack table 2 is also shown, with one tool 21 (the remaining tools are not shown in the figure).
  • the fixed distance or run X of the axial shifting of the tool-rack table 2 is also indicated.
  • Figure 2B shows the same elements, but after the tool-rack table 2 has been shifted a fixed distance X in an axial direction, towards the turntable 1.
  • the tool 21 affects the open end of the cylinder, along distance A in an axial direction, from the open end.
  • the tool 21 can contribute to forming or shaping a neck having a length substantially equal to said distance A (from the beginning of the neck and to the open end) (in figure 2B, an already formed neck is shown; however, in reality, the neck is not formed in a single step, i.e. in a single shifting of the rack, but rather in successive shifts, during which the successive tools 21, little by little, form the neck as the cylinder shifts from the loading position to the unloading position).
  • At least a plurality of the tools are provided with means for axially shifting the tool with regard to the tool-rack table, said means for axially shifting the tool with regard to the tool-rack table being synchronized with the means for axially shifting the tool-rack table, such that when the tool-rack table axially shifts towards the turntable, from the standstill position, said plurality of tools shifts towards the turntable with regard to the tool-rack table, such that the total shifting (X + Y) of the tool towards the turntable corresponds to the sum of the shifting of the tool-rack table (X) from the standstill position and the shifting (Y) of the tool with regard to the tool-rack table.
  • the invention allows increasing the total run of the tools in conventional machines existing on the market or already installed in factory, by simply adding to the conventional machines the means for axially shifting the tools with regard to the tool-rack table, and without having to significantly modify the original design of the machines. This allows obtaining longer necks with a minimum adaptation cost of conventional machines.
  • Another possible advantage of the invention is that it allows controlling in an independent manner the shifting of some tools, since in addition to the shifting of the tool-rack table, each tool can be shifted a certain distance with regard to said tool-rack table, this distance not necessarily being the same distance for all the tools.
  • the means for shifting the tool with regard to the tool-rack table can comprise a telescopic assembly by means of which the tool is attached to the tool-rack table and which has individual forward and backward movement.
  • the means for shifting the tool with regard to the tool-rack table can comprise pneumatic, hydraulic, electric shifting means, or any other type of shifting means suitable for the machine.
  • the means for shifting the tool with regard to the tool-rack table can be chosen such that they are the same type as those means for shifting the tool-rack table itself.
  • the means for shifting the tool with regard to the tool-rack table can preferably be pneumatic means, etc., this having the purpose of simplifying system configuration and maintenance, being able to use a single pressure source, etc.
  • a plurality of said means for axially shifting the tool with regard to the tool-rack table can be means for individually shifting a single tool with regard to the tool-rack table.
  • each tool can be provided with its own means for shifting with regard to the tool-rack table (for example, an independent telescopic assembly, etc.).
  • the drawback does exist that the cylinder can be trapped by the shaping tool with a force that can exceed the force with which the cylinder is retained on the turntable. This can cause the cylinder to be released from the securing means (grips or the like), interrupting the work cycle and making the manufacture impossible since, if it were released and trapped in the tool, it would collide with the following cylinder in the subsequent cycle. For this reason, to prevent this from occurring, a compressed air point can be introduced in the tool which aids in securing the container on the turntable.
  • the machine can include a compressed air expulsion system including at least one compressed air outlet associated to, at least, one of the tools (for example, located “inside” the tool, in the piston of the telescopic assembly which the tool is assembled on, which usually has a "hollow” configuration), said compressed air system being configured to discharge compressed air towards the cylinder opposite to said, at least one, tool during at least one part of the axial shifting cycle of the tool with regard to the cylinder (preferably, during the initial part of the backward movement phase of the tool with regard to the turntable and cylinder, from the contact position), for the purpose of preventing the cylinder from being retained in the tool when the tool moves backwards.
  • a compressed air expulsion system including at least one compressed air outlet associated to, at least, one of the tools (for example, located “inside” the tool, in the piston of the telescopic assembly which the tool is assembled on, which usually has a “hollow” configuration), said compressed air system being configured to discharge compressed air towards the cylinder opposite to said, at least one, tool
  • Another aspect of the invention refers to a method for shaping metal cylinders, comprising the steps of:
  • Shifting of the tool with regard to the tool-rack table can be carried out by means of a telescopic assembly by means of which the tool is attached to the tool-rack table.
  • Shifting of the tool with regard to the tool-rack table can be carried out with pneumatic, hydraulic, mechanical, electric shifting means or any other type of means suitable for the machine.
  • Some or all of the tools shifting with regard to the tool-rack table can be shifted with shifting means independent from those shifting means used for shifting other tools.
  • compressed air can be discharged on at least one of the cylinders.
  • a machine can include a conventional machine, comprising all the elements described above and which is shown in figures 1A-2B. This part of the machine does not require a more detailed description; it is a type of machine very well known in the field.
  • a telescopic assembly is coupled to the tool-rack table 2, which assembly comprises a cylinder 22, which is fixed on the tool-rack table 2, and a piston 23 which can axially shift in the cylinder and having one end projecting from the cylinder and on which end the tool 21 is coupled.
  • Figures 3A and 3B show this configuration.
  • one part of the tool-rack table 2 can be schematically seen with one of the tools 21 connected to the outer end of the piston 23, which can be shifted in the cylinder 22.
  • the cylinder can be a pneumatic or hydraulic cylinder.
  • the piston can be replaced by a spindle and the cylinder with a motor configured for shifting the spindle in an axial direction; there are many alternatives and the choice of the optimal alternative in each case can be made according to the other features of the machine in which the invention is to be implemented.
  • both the tool-rack table and the telescopic assembly are in standstill position, i.e. in a position distant from the cylinders 100 on the turntable 1. It can be seen how the tool 21 is facing a cylinder 100 yet to be shaped.
  • Figure 3B shows the tool-rack table 2 and the tool 21 after the axial shifting of both.
  • the tool acts on a cylinder already shaped or formed by the tool (as mentioned in relation to figure 2B, logically, in reality, the shaping is not usually carried out in a single step, but rather in a series of steps during which the cylinder goes from one shaping position to another, in each one of which positions it receives the impact of a tool corresponding to said position).
  • the tool-rack table has shifted a distance X from its standstill position
  • the tool 21 has shifted a distance Y with regard to the tool-rack table.
  • the tool has shifted a total distance X +Y with regard to the original standstill position.
  • Figure 4 schematically shows a cylinder 100 with a closed end 101 and with an open end 102 shaped or modified with a machine.
  • a neck with length A formed by the conventional machine is schematically shown.
  • a neck with length A + Y formed by a machine according to the invention is shown.
  • Figure 3 schematically shows an additional aspect of a preferred embodiment of the invention:
  • the cylinder 100 may be trapped by the shaping tool 21 with a force that may exceed the force with which the cylinder is retained on the turntable. This can cause the cylinder 100 to be released from the securing means (grips or the like) 11, interrupting the work cycle and making the manufacture impossible (since if it were released and trapped in the tool, it would collide with the next container in the following cycle).
  • the machine can comprise a plurality of compressed air outlets 25, for example, a compressed air outlet 25 located in each piston 23 and directed towards the turntable.
  • Said compressed air outlet is part of a compressed air discharge system 26 configured to discharge compressed air towards the cylinders in a manner synchronized with the shifting of the tools and with the work cycles of the machine.
  • a compressed air discharge through the nozzles or outlets 25 begins, such that said air exerts pressure on the cylinders in a direction towards the turntable 1.
  • the discharge of air can last until the tools have moved backwards enough to no longer be in contact with the cylinders.
  • the average person skilled in the art can easily adjust the operation of the compressed air discharge system to the circumstances and conditions of each case.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Workpieces (AREA)
EP03380261A 2003-11-11 2003-11-11 Vorrichtung und Verfahren zum Umformen von Behältern Withdrawn EP1531017A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03380261A EP1531017A1 (de) 2003-11-11 2003-11-11 Vorrichtung und Verfahren zum Umformen von Behältern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03380261A EP1531017A1 (de) 2003-11-11 2003-11-11 Vorrichtung und Verfahren zum Umformen von Behältern

Publications (1)

Publication Number Publication Date
EP1531017A1 true EP1531017A1 (de) 2005-05-18

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EP03380261A Withdrawn EP1531017A1 (de) 2003-11-11 2003-11-11 Vorrichtung und Verfahren zum Umformen von Behältern

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2912332A1 (fr) * 2007-02-13 2008-08-15 Aerocan France Machine compacte de conification des boitiers metalliques pour distributeurs aerosols et aquivalents
CH703706A1 (de) * 2010-09-15 2012-03-15 Mall & Herlan Schweiz Ag Einziehmaschine.
EP2851141A1 (de) * 2013-09-20 2015-03-25 Moravia Cans a.s. Verfahren zur Formung von Behältern und Vorrichtung zur Herstellung davon
WO2017207846A1 (es) * 2016-05-31 2017-12-07 Tech Pro Pack S.L. Máquina conformadora de cuellos de envases y método para la inspección de envases implementado con dicha máquina

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874209A (en) * 1973-05-04 1975-04-01 Fmi Mecfond Aziende Mecc Apparatus for simultaneously tapering and flanging the bodies of cylindrical metal cans
US3913366A (en) * 1974-05-10 1975-10-21 Gulf & Western Mfg Co Apparatus for necking-in can bodies
EP0275369A2 (de) * 1987-01-21 1988-07-27 FRATTINI S.p.A.-COSTRUZIONI MECCANICHE Maschine zum Formen von Konus und Flansch an Sprühdosen und dergleichen
US5653138A (en) * 1995-05-13 1997-08-05 Krupp Maschinentechnik Gesellschaft Mit Beschrankter Haftung Method and apparatus for forming a necked and flanged part on a hollow cylindrical body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874209A (en) * 1973-05-04 1975-04-01 Fmi Mecfond Aziende Mecc Apparatus for simultaneously tapering and flanging the bodies of cylindrical metal cans
US3913366A (en) * 1974-05-10 1975-10-21 Gulf & Western Mfg Co Apparatus for necking-in can bodies
EP0275369A2 (de) * 1987-01-21 1988-07-27 FRATTINI S.p.A.-COSTRUZIONI MECCANICHE Maschine zum Formen von Konus und Flansch an Sprühdosen und dergleichen
US5653138A (en) * 1995-05-13 1997-08-05 Krupp Maschinentechnik Gesellschaft Mit Beschrankter Haftung Method and apparatus for forming a necked and flanged part on a hollow cylindrical body

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2912332A1 (fr) * 2007-02-13 2008-08-15 Aerocan France Machine compacte de conification des boitiers metalliques pour distributeurs aerosols et aquivalents
WO2008110679A1 (fr) * 2007-02-13 2008-09-18 Aerocan France Machine compacte de conification des boitiers metalliques pour distributeurs aerosols et equivalents
CH703706A1 (de) * 2010-09-15 2012-03-15 Mall & Herlan Schweiz Ag Einziehmaschine.
US8776572B2 (en) 2010-09-15 2014-07-15 Mall + Herlan Schweiz Ag Necking machine
EP2851141A1 (de) * 2013-09-20 2015-03-25 Moravia Cans a.s. Verfahren zur Formung von Behältern und Vorrichtung zur Herstellung davon
WO2017207846A1 (es) * 2016-05-31 2017-12-07 Tech Pro Pack S.L. Máquina conformadora de cuellos de envases y método para la inspección de envases implementado con dicha máquina
US10557799B2 (en) 2016-05-31 2020-02-11 Tech Pro Packag S.L. Apparatus and method for the inspection of containers
EP3974818A1 (de) * 2016-05-31 2022-03-30 Tech Pro Packag S.L. Inspektionsvorrichtung für behälter und verfahren zur inspektion von behältern mit besagter vorrichtung

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