EP0467020B1 - Dispositif de limitation de pression pour un outil avec poinçon et matrice - Google Patents

Dispositif de limitation de pression pour un outil avec poinçon et matrice Download PDF

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Publication number
EP0467020B1
EP0467020B1 EP91106027A EP91106027A EP0467020B1 EP 0467020 B1 EP0467020 B1 EP 0467020B1 EP 91106027 A EP91106027 A EP 91106027A EP 91106027 A EP91106027 A EP 91106027A EP 0467020 B1 EP0467020 B1 EP 0467020B1
Authority
EP
European Patent Office
Prior art keywords
accumulator
piston
chamber
pressure
tool
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
EP91106027A
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German (de)
English (en)
Other versions
EP0467020A1 (fr
Inventor
Hans Dr. Wälchli
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT91106027T priority Critical patent/ATE97372T1/de
Publication of EP0467020A1 publication Critical patent/EP0467020A1/fr
Application granted granted Critical
Publication of EP0467020B1 publication Critical patent/EP0467020B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/04—Applying separate sealing or securing members, e.g. clips

Definitions

  • the present invention relates to a pressure limiting device for a tool with a stamp and die.
  • So-called clips are used in devices for tying sausages, which are deformed by means of a stamp and a die so that the end of the sausage is closed.
  • the stamp and die of such a device are e.g. shown in DE-A-38 40 522.
  • US-A-3,913,628 shows a closing device, in particular for clips on food packaging. Due to the large number of sausages, different clips are used, which differ both in type and in size. This means that the punches and dies on the binding machines have to be changed, and the working stroke between the punches and dies often has to be changed as well. This leads to incorrect manipulation, which can lead to destruction of the binding machine, particularly when changing from a small to a larger working stroke.
  • the aim of the invention is to provide a device which does not have the disadvantage and with which the tool is protected.
  • the device shown in FIG. 1 is mounted in a tool holder 1 of a machine for tying sausages.
  • the device in question essentially consists of a cylindrical plunger 2 and a pressure accumulator 3.
  • the plunger 2 is mounted in a recess which is dimensioned such that a chamber 4 is present between the piston head and the bottom of the recess.
  • the plunger 2 is held in the recess by an end plate 12 and is provided with a sealing ring 6 which seals the chamber 4 to the outside.
  • the plunger 2 also has a cylindrical projection 7 which protrudes from the piston head and projects through a bore in the tool holder. At the free end of the approach has a threaded portion on which a ring nut 9 is screwed to adjust the volume of the chamber 4. In order to facilitate the setting, a pointer 9 is mounted on the extension 7. A scale 10 is engraved on the tool carrier 1 for adjustment.
  • the plunger 2 has a second cylindrical projection 11, which protrudes from the other end face and projects through the end plate 12, which holds the plunger 2 in the recess.
  • a stamp 13 is mounted on the second attachment 11.
  • the pressure accumulator 3 has a cylindrical housing, consisting of a lower part 15 which is open on one side and has a bore 16 in the other end wall (FIG. 2) and an end cap 17 which can be screwed onto the open end of the lower part 15.
  • a storage piston 18 is arranged axially displaceably in the housing, which divides the space in the housing into a liquid space 19 and a gas space 20.
  • a valve piston 21 is displaceably arranged in the liquid space 19 in order to open or close the opening 16 in the lower part 15.
  • a spring 22 is arranged in the liquid space 19 in order to press the valve piston 21 against the opening 16, while a further spring 23 is arranged in the gas space 20 in order to bias the storage piston 18 against the liquid space 19.
  • the pressure accumulator is also provided with a preliminary stroke valve 24.
  • the pressure accumulator 3 is mounted in a recess in the tool holder 1 so that the opening 16 in the lower part 15 is aligned with a bore 26 which opens into the chamber 4.
  • the opening 16 in the lower housing part 15 has a seat which cooperates with a first seat on a tubular extension 25 on the valve piston 21 in order to open or close the opening 16 on the pressure accumulator.
  • the extension 25 on the valve piston 21 also has a second seat, which interacts with the pre-stroke valve body 24.
  • the working stroke of the tool must be adapted to the clip height.
  • the following description of the function of the device now assumes that the adaptation has not been carried out and that the tool carries out a small working stroke, although a larger working stroke is required.
  • the punch and the die are pressed together before the end of the working stroke.
  • the pressure that occurs is transferred to the liquid present in the chamber 4, propagates through the bore 26, and acts on the valve piston 21 and the valve body 24 of the pre-stroke valve that bears against it.
  • a setpoint pressure value for the plunger can be obtained 2 can be determined. If the actual value in the chamber 4 exceeds this target value, the valve piston 21 is displaced and consequently the chamber 4 is relieved via the bore 26. As a result, the plunger 2 is displaced, whereby the working stroke of the tool is adjusted in the sense of an extension.
  • the machine can be switched off and an acoustic or visual signal can be emitted.
  • the pre-stroke valve is actuated.
  • the plunger 2 can be adjusted without pressure.
  • the liquid is then fed back through the pressure accumulator 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Fluid-Damping Devices (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Forging (AREA)

Claims (9)

  1. Dispositif pour la limitation de la pression de fermeture d'un outil avec poinçon et matrice, caractérisé par un piston plongeur (2) connecté au poinçon (13) et aménagé dans une chambre (4) remplie d'un liquide, et par un accumulateur de pression (3) accouplé à la chambre (4) et répondant à une valeur de la pression dans la chambre (4) qui correspond à une pression de fermeture nominale, pour prolonger la course entre le poinçon (13) et la matrice.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'accumulateur de pression (3) est un accumulateur à piston.
  3. Dispositif selon une des revendications 1 ou 2, caractérisé en ce que l'accumulateur de pression (3) est muni d'une soupape de neutralisation (24) pour ajuster sans pression le piston plongeur (2).
  4. Dispositif selon la revendication 3, caractérisé en ce que la soupape de neutralisation (24) débouche du côté admission dans la chambre (4).
  5. Dispositif selon une des revendications 1 à 4, caractérisé en ce que l'accumulateur de pression (3) possède un boitier cylindrique avec une partie inférieure (15) ayant à une extrémité un orifice (16) débouchant dans la chambre (4) et à l'autre extrémité un couvercle de fermeture (17) pour fermer la partie inférieure (15), un accumulateur à piston (18) étant aménagé à coulisse dans la partie inférieure du boîtier (15) et divisant la cavité dans le boîtier en une chambre à liquide (19) et une chambre à gaz (20), et comportant un piston à soupape (21) aménagé à coulisse dans la chambre à liquide (19) pour ouvrir, respectivement pour fermer, l'orifice (16) dans le boîtier.
  6. Dispositif selon la revendication 5, caractérisé en ce que le piston à soupape (21) a une embase tubulaire (25) ayant une surface de siège à l'extérieur coopérant avec une surface de siège dans l'orifice (16) pour séparer la chambre à liquide (19) de l'accumulateur de pression (3) contre la chambre (4), et ayant une surface de siège à l'intérieur coopérant avec une surface de siège du corps de soupape de la soupape de neutralisation (24) pour ajuster sans pression le piston plongeur (2).
  7. Dispositif selon la revendication 6, caractérisé en ce qu'un ressort (22) est prévu pour pousser le piston à soupape (21) contre la surface de siège dans l'orifice (16) de l'accumulateur de pression (3).
  8. Dispositif selon une des revendications 5 à 7, caractérisé en ce qu'un ressort (23) est prévu pour la pré-tension du piston accumulateur (18) contre la chambre à liquide (19).
  9. Dispositif selon une des revendications 1 à 8, caractérisé en ce que le piston plongeur (2) est aménagé dans un porte-outil (1) et muni d'une aiguille indicatrice (9), et en ce que le porte-outil (1) est muni d'une échelle (10) pour ajuster le piston plongeur (2) à l'intérieur de la chambre (4).
EP91106027A 1990-07-16 1991-04-15 Dispositif de limitation de pression pour un outil avec poinçon et matrice Expired - Lifetime EP0467020B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91106027T ATE97372T1 (de) 1990-07-16 1991-04-15 Druckbegrenzungsvorrichtung fuer ein werkzeug mit stempel und matrize.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2362/90A CH679903A5 (fr) 1990-07-16 1990-07-16
CH2362/90 1990-07-16

Publications (2)

Publication Number Publication Date
EP0467020A1 EP0467020A1 (fr) 1992-01-22
EP0467020B1 true EP0467020B1 (fr) 1993-11-18

Family

ID=4232021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106027A Expired - Lifetime EP0467020B1 (fr) 1990-07-16 1991-04-15 Dispositif de limitation de pression pour un outil avec poinçon et matrice

Country Status (5)

Country Link
EP (1) EP0467020B1 (fr)
AT (1) ATE97372T1 (fr)
CH (1) CH679903A5 (fr)
DE (1) DE59100605D1 (fr)
ES (1) ES2046815T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738298C1 (de) * 1997-09-02 1999-04-08 Poly Clip System Gmbh & Co Kg Verfahren zum Einrichten einer Verschließmaschine und Vorrichtung zum Verschließen von Verschlußklammern
DE20314562U1 (de) * 2003-09-19 2003-12-04 Poly-Clip System Gmbh & Co Kg Clipmaschinenantrieb
DE102005026219B4 (de) * 2005-06-07 2007-12-13 Poly-Clip System Gmbh & Co. Kg Clipmaschine und Verfahren zum Einrichten einer Clipmaschine
EP1757522B1 (fr) 2005-08-26 2009-05-06 Tipper Tie Alpina AG Procédé et dispositif pour sceller avec des clips des paquets avec la forme d'une saucisse
WO2007092769A2 (fr) 2006-02-03 2007-08-16 Poly-Clip System Corp. Système de réglage de paramètres de fixation d'agrafes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383754A (en) * 1967-01-10 1968-05-21 Rheem Mfg Co Fluid driven mechanism with protective stroke for applying a clip around a casing
US3913628A (en) * 1971-05-10 1975-10-21 Kartridg Pak Co Method and apparatus for hermetically sealing a package

Also Published As

Publication number Publication date
ATE97372T1 (de) 1993-12-15
ES2046815T3 (es) 1994-02-01
EP0467020A1 (fr) 1992-01-22
CH679903A5 (fr) 1992-05-15
DE59100605D1 (de) 1993-12-23

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