DE2521234A1 - Rapid development of welding pressure - used on polypropylene coated containers to obtain hermetic seals between contaminated surfaces - Google Patents

Rapid development of welding pressure - used on polypropylene coated containers to obtain hermetic seals between contaminated surfaces

Info

Publication number
DE2521234A1
DE2521234A1 DE19752521234 DE2521234A DE2521234A1 DE 2521234 A1 DE2521234 A1 DE 2521234A1 DE 19752521234 DE19752521234 DE 19752521234 DE 2521234 A DE2521234 A DE 2521234A DE 2521234 A1 DE2521234 A1 DE 2521234A1
Authority
DE
Germany
Prior art keywords
pressure
sealing
rapid development
welding
containers
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.)
Pending
Application number
DE19752521234
Other languages
German (de)
Inventor
Manfred Selle
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.)
FKF BERLIN FLEISCH KONSERVEN
Original Assignee
FKF BERLIN FLEISCH KONSERVEN
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 FKF BERLIN FLEISCH KONSERVEN filed Critical FKF BERLIN FLEISCH KONSERVEN
Priority to DE19752521234 priority Critical patent/DE2521234A1/en
Priority to CH337776A priority patent/CH602309A5/en
Priority to DD19198876A priority patent/DD124465A5/xx
Priority to NL7603163A priority patent/NL7603163A/en
Priority to BE165680A priority patent/BE840183A/en
Priority to IT6774776A priority patent/IT1057820B/en
Priority to FR7609989A priority patent/FR2310269A1/en
Priority to SE7605119A priority patent/SE417928B/en
Priority to GB4845577A priority patent/GB1516252A/en
Priority to GB1894376A priority patent/GB1516251A/en
Priority to US05/684,942 priority patent/US4097318A/en
Publication of DE2521234A1 publication Critical patent/DE2521234A1/en
Priority to US05/885,130 priority patent/US4167435A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • B29C66/92441—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time
    • B29C66/92443—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time following a pressure-time profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B29C66/9292—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams
    • B29C66/92921—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams in specific relation to time, e.g. pressure-time diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Process for welding joints between thermoplastic (polypropylene) coatings on lightweight plastic coated metal containers by pressing heated surfaces together, where the mechanism for consolidating the weld interface develops the max. required welding pressure in 20 pref. 3-5% of the period required for the welding cycle. Esp. for sealing containers of >1000ml. capacity. Rapid development of the moulding pressure ensures a good weld between surfaces which are partially contaminated by material being previously put into the container, where the contamination results in nonhermetic seals if weld pressures are developed slowly. The mechanism is efficient at generating a high thrust to be sustained by the hydraulic system without requiring a high (pressure x swept volume) prod. from either of the power cylinders involved.

Description

Vorrichtung zum hermetischen Verschließen von kunststoffbeschichteten Leichtbehältern Die Erfindung betrifft eine Vorrichtung zum hermetischen Verschließen von kunststoffbeschichteten Leichtbehältern mit Anordnungen zum zeitlich, thermisch und druckmäßig einregulierten Zusammenbringen der heiß zu siegelnden Flächen.Device for the hermetic sealing of plastic-coated Lightweight containers The invention relates to a device for hermetically sealing of plastic-coated lightweight containers with arrangements for temporal, thermal and pressure-regulated bringing together of the surfaces to be heat-sealed.

Auf dem Gebiet der Konservierung von Lebensmitteln durch Hitzesterilisation in Metallbehältnissen setzt sich mehr und mehr die Verwendung von sogenannten Leichtbehältern durch, insbesondere die Verwendung von relativ großen Behältern mit einem Fassungsvermögen von über 1000 ml. Derartige Leichtbehälter bestehen aus einer Leichtmetallfolie, die mit einem heißsiegelfähigen Kunststoff beschichtet ist. Das hermetische Verschließen derartiger Behälter erfolgt durch Verbinden des Deckelrandes mit dem Schalenrand dergestalt, daß durch Beaufschlagen einer geeigneten Temperatur und eines geeignetes Drucks sowie einer geeigneten Zeitspanne lang die beiden Kunststoffschichten miteinander homogen verbunden werden.In the field of food preservation by heat sterilization The use of so-called lightweight containers is becoming more and more common in metal containers by, in particular, the use of relatively large containers with a capacity of over 1000 ml. Such light containers consist of a light metal foil, which is coated with a heat-sealable plastic. Hermetic sealing such a container is made by connecting the edge of the lid to the edge of the bowl such that by applying a suitable temperature and a suitable Pressure and a suitable period of time, the two plastic layers together be connected homogeneously.

Bei derartigen Heißsiegelungen ist es erforderlich, eine relativ große Fläche zu verschließen, die darüber hinaus oftmals durch den Füllvorgang mit dem zu konservierenden Gut verschmutzt ist und wegen des Arbeitstaktes von dem Bedienungspersonal nur grob durch Abwischen gesäubert werden kann, so daß zumindest noch Feuchtigkeit auf den heiß zu siegelnden hydrophoben Flächen vorliegt. Nur bei Einhalten eng begrenzter Toleranzen der Parameter Temperatur, Druck und Zeit ist es möglich, die Heißsiegelung einwandfrei zu gestalten. Neben der Meßbarkeit müssen die einschlägigen Werte auch einstellbar sein und die einmal eingestellten Werte dürfen sich ntht ändern, denn, wenn auch nur eine sehr geringzügige Fehlstelle in der Heißsiegelnaht vorliegt, führt dies unweigerlich zum Verderb des Gutes, und bis zum Feststellen derartiger Fehler kann somit eine sehr erhebliche Fehlproduktion mit den sich daraus ergebenden Konsequenzen angelaufen sein.Such heat seals require a relatively large one To close the area, which is also often caused by the filling process with the Good to be preserved is soiled and because of the work cycle of the operating personnel can only be roughly cleaned by wiping, so that at least still humidity is present on the hydrophobic surfaces to be heat-sealed. Only if strictly limited are adhered to Tolerances of the parameters temperature, pressure and time, it is possible to heat seal to design flawlessly. In addition to measurability, the relevant values must also be adjustable and the values that have been set may not change, because, even if there is only a very minor defect in the heat-sealed seam, this inevitably leads to the spoilage of the goods, and until such a thing is discovered Errors can thus result in a very significant production failure Consequences have started.

Das Einregulieren der Temperatur stellt keine besonderen Probleme dar, da eine Feinregulierung durch entsprechend angeordnete Temperaturfühler eingestellt werden kann. Besonders kritisch sind jedoch die Druckbedingungen, sowie der Zeitfaktor, worunter zu verstehen ist sowohl die Zeitspanne, innerhalb derer der eigentliche Siegeldruck beaufschlagt wird, als auch die Zeitspanne, die bis zum Aufbau auf den Heißsiegeldruck und bis zum Abbau auf Normaldruck erforderlich sind. Innerhalb eines von der Art des Kunststoffes und der Temperatur abhängigen möglichen Siegeldruckbereichtes gilt, daß je höher der Druck, um so kürzer die Siegelzeit und um so besser werden die von dem Füllvorgang auf den Siegelflächen vorliegenden Verschmutzungen aus der Siegelzone herausgedrückt.Adjusting the temperature does not pose any particular problems because a fine adjustment is set by appropriately arranged temperature sensors can be. However, the printing conditions and the time factor are particularly critical. by which is to be understood both the time span within which the actual Sealing pressure is applied, as well as the time it takes to build up on the Heat sealing pressure and until decomposition to normal pressure are required. Within a Possible sealing pressure range depending on the type of plastic and the temperature The rule is that the higher the pressure, the shorter the sealing time and the better the soiling on the sealing surfaces from the filling process from the Sealing zone pushed out.

Weiterhin sollte die für den Aufbau des vollen Siegeldruckes erforderliche Zeit nicht mehr als 20% der gesamten Siegelzeit betiagen, und unter der Siegelzeit ist die Zeitspanne zwischen Beginn und Ende der Berührung vom oberen und unteren Siegelwerkzeug unter Zwischenschaltung der heiß zu siegelnden Flächen zu verstehen.Furthermore, the required for building up the full sealing pressure should be Do not spend more than 20% of the total sealing time and less than the sealing time is the length of time between the beginning and the end of the contact of the upper and lower Sealing tool to be understood by the interposition of the hot-sealed surfaces.

Es ist bekannt, zur Erfüllung dieser Erfordernisse die erforderlichen Druckkräfte vermittels Fluids oder durch Kurvengetriebe zu beaufschlagen.It is known that the necessary to meet these requirements To apply pressure forces by means of fluids or cam gears.

Das Beaufschlagen des Siegeldrucks vermittels eines Gases, wie Luft als Fluid, bedingt den Nachteil eines langsamen Druckaufbaues bedingt durch die Kompressibilität des Gases, wodurch Füllgutrückstände nicht mit Sicherheit von der Siegelfläche weggequetscht werden und an dem Kunststoff festbrennen, wodurch ein hermetischer Verschluß unmöglich gemacht wird.Applying the sealing pressure by means of a gas, such as air as a fluid, due to the disadvantage of a slow pressure build-up due to the Compressibility of the gas, resulting in product residues not with Safety of being squeezed away from the sealing surface and burning to the plastic, whereby a hermetic seal is made impossible.

Die Einstellung der Siegelzeit erfolgt hier über eine Zeitschaltuhr, die wiederum ein Ventil steuert, das den Druckzylinder nach der eingestellten Zeit umsteuert. Da derartige Vorrichtungen stets hohen relativen Luftfeuchtigkeiten ausgesetzt sind, läßt sich die Bildung von Kondenswasser im Luftsystem nicht verhindern. Hierdurch werden dann nach einiger Zeit Schaltungsungenauigkeiten eintreten, so daß eine reproduzierbare Siegelzeit nicht gewährleistet ist. Da der Druckzylinder für jeden Verschlußvorgang zweimal gefüllt werden muß, ergibt sich auch ein hoher Luftverbrauch, und darüber hinaus führen Druckschwankungen in dem Druckluftsystem zu unterschiedlichen Siegeldrücken.The setting of the sealing time is done here via a timer, which in turn controls a valve that controls the pressure cylinder after the set time reverses. Since such devices are always exposed to high relative humidity the formation of condensation in the air system cannot be prevented. Through this circuit inaccuracies will then occur after some time, so that a reproducible Sealing time is not guaranteed. As the pressure cylinder for each locking process must be filled twice, there is also a high air consumption, and above In addition, pressure fluctuations in the compressed air system lead to different sealing pressures.

Das Beaufschlagen des Siegeldrucks vermittels einer Flüssigkeit als Fluid bedingt im wesentlichen die gleichen Nachteile, wie das Anwenden eines Gases als Fluid mit Ausnahme derjenigen, die auf die Kompressibilität und die Bildung von Kondenswasser zurückzuführen sind, jedoch ergibt sich auch hier ein relativ langsamer Druckaufbau, und es wurde bereits darauf hingeweisen, daß es sich hierbei um einen kritischen Parameter handelt und. es können leicht Schaltungenauigkeiten durch die erforderlichen Hydraulikventile bedingt werden.The application of the sealing pressure by means of a liquid as Fluid causes essentially the same disadvantages as the use of a gas as a fluid with the exception of those related to compressibility and formation are due to condensation, but here too there is a relative pressure build-up is slow, and it has already been indicated that this is the case is a critical parameter and. there can easily be circuit inaccuracies due to the hydraulic valves required.

Das Beaufschlagen des Siegeldrucks vermittels eines Kurvengetriebes unter Anwenden von Kurvenscheiben oder Kurvenzylindern führt zwar zu einem schnellen Druckaufbau, da jedoch durch Teller, Schrauben oder Gumtifedern eine Abfederung des oberen und unteren Siegelwerkzeugs erforderlich ist, kann der Siegeldruck nur schwer auf einen bestimmten erforderlichen Wert eingestellt werden und die Federungselemente zeigen nach einiger Zeit Ermüdungserscheinungen, so daß ein Auswandern aus dem kritischen Druckbereich erfolgt.Applying the sealing pressure by means of a cam gear using cams or cam cylinders leads to a fast Pressure build-up, as there is cushioning due to plates, screws or rubber springs of the upper and lower sealing tools is required, the sealing pressure can only difficult to set to a certain required value and the suspension elements show signs of fatigue after some time, so that an emigration from the critical Printing area takes place.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der angegebenen Art so zu gestalten, daß die für eine einwandfreie Heißsiegelung erforderlichen Parameter des schnellen Aufbaues des Drucks auf einen vorherbestimmten Wert verläßlich und unabhängig von äußeren Einflüssen in stets reproduzierbarer Weise zu erreichen.The invention is based on the object of providing a device of the specified Art to be designed so that the necessary for a proper heat seal Reliable parameters of the rapid build-up of the pressure to a predetermined value and can be achieved in a reproducible manner regardless of external influences.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß für die Steuerung der Größe und der Dauer des Siegeldrucks ein hydraulikbetätigter Kniehebel vorgesehen ist, der an einem Ende an einem Luftzylinder angelenkt ist. Dieser Luftzylinder kann, da praktisch kein Luftverlust entsteht, unabhängig von dem Druckluftnetz mit einer Preßluftflasche beaufschlagt werden.This object is achieved according to the invention in that for the control the size and duration of the sealing pressure, a hydraulically operated toggle lever is provided is hinged at one end to an air cylinder. This air cylinder can, since there is practically no loss of air, regardless of the compressed air network a compressed air cylinder are applied.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß es die hier geschaffene zwangsläufige Kinematik mit mehreren einregelbaren Parametern ermöglicht, sehr schnell den Siegeldruck aufzubauen und abzubauen, die Dauer des Siegeldrucks genau einzustellen, ohne daß zu befürchten steht, daß die einmal vorgegebenen Werte sich über längere Zeiträume hin ändern.The advantages achieved with the invention are in particular: that it is the inevitable kinematics created here with several adjustable parameters enables the sealing pressure to be built up and reduced very quickly, the duration of the Sealing pressure to be set exactly, without having to fear that the once specified Values change over longer periods of time.

Ein Ausführup'gsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen: Figur 1 eine schematische Darstellung im Schnitt der erfindungsgemäßen Vorrichtung; Figur 2 ein Druck-Zeit-Diagramm einer Fluid betätigten Verschließvorrichtung; Figur 3 ein Druck-Zeit-Diagramm der erfindungsgemäß betätigten Verschließvorrichtung.An exemplary embodiment of the invention is shown in the drawing and is described in more detail below. They show: FIG. 1 a schematic representation in section of the device according to the invention; Figure 2 is a pressure-time diagram of a Fluid actuated closure device; FIG. 3 shows a pressure-time diagram according to the invention actuated locking device.

Die erfindungsgemäße Vorrichtung setzt sich aus einem oberen Grundgestell la, einem unteren Grundgestell lb, einer oberen Gestellplatte 2a, die ein oberes Siegelwerkzeug 3a trägt, einer unteren Gestellplatte 2b, die das untere Siegelwerkzeug 3b trägt, zusammen. Ein Kniehebel 4 ist an seinem oberen Ende an einem in dem oberen Grundgestell la geführten Gestänge, das die untere Gestellplatte 2b mit dem unteren Siegelwerkzeug 3b trägt und an seinem unteren Ende an einem in dem unteren Grundgestell lb geführten Gestänge, dasmit dem Kolben 5 eines Luftzylinders 6 in Verbindung steht, angelenkt. Der Antrieb des Kniehebels 4 erfolgt durch einen Hydraulikzylinder 7 mit durchgehender Kolbenstange.The device according to the invention consists of an upper base frame la, a lower base frame lb, an upper frame plate 2a, which is an upper Sealing tool 3a carries a lower frame plate 2b, which the lower sealing tool 3b carries together. A toggle lever 4 is at its upper end on one in the upper one Base frame la guided linkage that the lower Frame plate 2b with the lower sealing tool 3b and at its lower end to an in the lower base frame lb guided rod, which with the piston 5 of an air cylinder 6 is in connection, hinged. The toggle lever 4 is driven by a Hydraulic cylinder 7 with through piston rod.

In der Ausgangsstellung steht der Kniehebel 4 etwa 45° zur gestreckten Mittellage. Bei Auslösen eines Arbeitstaktes wird der Kniehebel 4 gestreckt und das untere Siegelwerkzeug 3b -in Richtung auf das obere Siegelwerkzeug 3a bewegt. Etwa 150 vor der gestreckten Lage des Kniehebels fährt das untere Siegelwerkzeug 3b gegen das feststehende obere Siegelwerkzeug 3a. Die hier genannte Grddzahl ist nur beispielsweise zu verstehen, die Anordnung kann so eingestellt werden, daß die Berührung der beiden Siegelwerkzeuge in einem Winkelbereich des Kniehebels von 5 bis 200 erfolgt.In the starting position, the toggle lever 4 is about 45 ° to the extended one Middle position. When a work cycle is triggered, the toggle lever 4 is stretched and the lower sealing tool 3b moves in the direction of the upper sealing tool 3a. The lower sealing tool moves about 150 in front of the extended position of the toggle lever 3b against the fixed upper sealing tool 3a. The number given here is to understand only for example, the arrangement can be set so that the Touching the two sealing tools in an angular range of the toggle lever of 5 until 200 takes place.

Zu diesem Zeitpunkt beginnt der eigentliche Siegelvorgang durch den plötzlichen Druckaufbau gegen den Luftzylinder 6, der unter einem vorgegebenen Druck steht.At this point, the actual sealing process begins with the sudden pressure build-up against the air cylinder 6, which is under a predetermined pressure stands.

Somit braucht weder in dem Luftzylinder 6 noch in dem Hydraulikzylinder 7 aufgrund des günstigen Ubersetzungsverhältnisses des Kniehebels 4 ein Druck aufgebaut zu werden. Die Siegelzeit dauert solange, bis der Kniehebel durch seine gestreckte Lage bis etwa 150 zu der anderen Seite gefahren ist. Sodann ist die Siegelzeit beendet, der Kolben 5 des Luftzylinders 6 befindet sich wieder in der ursprünglichen Lage, und bei Weiterfahren des Hydraulikzylinders 7 bis in seine Endlage, wobei der Kniehebel 4 dann etwa 450 zur gestreckten Mittellage, aus der der Ausgangslage gegenüberliegenden Lage vorliegt, ist dann das untere Siegelwerkzeug 3b wieder in die Ausgangslage abgesenkt.Thus, neither in the air cylinder 6 nor in the hydraulic cylinder 7 a pressure built up due to the favorable transmission ratio of the toggle lever 4 to become. The sealing time lasts until the toggle lever is stretched through its Location until about 150 to the other side. Then the sealing time is over, the piston 5 of the air cylinder 6 is back in its original position, and when the hydraulic cylinder 7 continues to move into its end position, the toggle lever 4 then about 450 to the stretched middle position, from the one opposite the starting position Position is present, the lower sealing tool 3b is then back in the starting position lowered.

Der nächste Siegelvorgang wird durch Rückruf des Hydraulikzylinders inganggesetzt.The next sealing process is triggered by a recall of the hydraulic cylinder set in motion.

Durch die durchgehende Kolbenstange des Hydraulikzylinders ergeben sich bei Vor- und Rücklauf gleich große Kolbenflächen und somit gleiche Geschwindigkeit.Result from the continuous piston rod of the hydraulic cylinder Piston areas of the same size and therefore the same speed are achieved with forward and reverse travel.

Die Diagramme nach den Figuren 2 und 3 zeigen vergleichsweise den Druckaufbau gegen die Zeit nach dem Stand der Technik entsprechend Figur 2 und wie bei dem Erfindungsgegenstand, entsprechend der Figur 3. Man sieht, daß erfindungsgemlß angenähert eine Rechteckkurve vorliegt, der Aufbau bis zu dem Siegeldruck und der Abbau desselben erfolgen innerhalb einer Zeitspanne von etwa 0,05 Sekunden, während nach dem Stand der Technik eine ausgeprägte Trapezkurve vorliegt und der Druckaufbau und Abbau sich in der Größenordnung von 0,5 Sekunden bewegt. Die Unterschiede zwischen dem Stand der Technik und dem Erfindungsgegenstand liegen somit in der Größenordnung einer Zehnerpotenz.The diagrams according to Figures 2 and 3 show comparatively the Pressure build-up against time according to the prior art according to FIG. 2 and how in the subject matter of the invention, corresponding to Figure 3. It can be seen that according to the invention approximately a rectangular curve is present, the structure up to the sealing pressure and the Degradation of the same take place within a period of about 0.05 seconds while According to the prior art, there is a pronounced trapezoidal curve and the pressure build-up and degradation is on the order of 0.5 seconds. The differences between the prior art and the subject matter of the invention are thus of the order of magnitude a power of ten.

Claims (1)

Patentanspruch Claim Vorrichtung zum hermetischen Verschließen von kunststoffbeschichteten Leichtbehältern, dadurch g e k e n n z e i c h -n e t , daß für die Steuerung der Größe und der Dauer des Siegeldrucks ein hydraulikbetätigter Kniehebel (4) vorgesehen ist, der an einem Ende an einem Luftzylinder (6) angelenkt ist. L e e r s e i t eDevice for the hermetic sealing of plastic-coated Light containers, thereby g e k e n n n z e i c h -n e t that for the control of the A hydraulically operated toggle lever (4) is provided for the size and duration of the sealing pressure is hinged at one end to an air cylinder (6). L. e e r e i t e
DE19752521234 1975-05-09 1975-05-09 Rapid development of welding pressure - used on polypropylene coated containers to obtain hermetic seals between contaminated surfaces Pending DE2521234A1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
DE19752521234 DE2521234A1 (en) 1975-05-09 1975-05-09 Rapid development of welding pressure - used on polypropylene coated containers to obtain hermetic seals between contaminated surfaces
CH337776A CH602309A5 (en) 1975-05-09 1976-03-17 Rapid development of welding pressure
DD19198876A DD124465A5 (en) 1975-05-09 1976-03-23
NL7603163A NL7603163A (en) 1975-05-09 1976-03-26 METHOD AND DEVICE FOR FORMING A PERMANENT HERMETIC WELDED SEAM BETWEEN THE PLASTIC LAYERS OF PARTS OF A PLASTIC COATED METAL OBJECT.
BE165680A BE840183A (en) 1975-05-09 1976-03-30 METHOD AND DEVICE FOR FORMING A HERMETIC WELDED JOINT BETWEEN THE LAYERS OF SYNTHETIC MATERIAL OF A BODY SHAPED FROM LAYERS OF METAL AND SYNTHETIC MATERIAL
IT6774776A IT1057820B (en) 1975-05-09 1976-03-31 DEVICE AND PROCEDURE FOR THE LEALIZATION OF A HERMETIC CONTINUOUS SEALING RESISTANT BETWEEN PLASTIC LAYERS OF A PLASTIFIED METALLIC CORPOSTRATIFICATE
FR7609989A FR2310269A1 (en) 1975-05-09 1976-04-06 METHOD AND DEVICE FOR FORMING A HERMETIC WELDED JOINT BETWEEN THE LAYERS OF SYNTHETIC MATERIAL OF A BODY SHAPED FROM LAYERS OF METAL AND SYNTHETIC MATERIAL
SE7605119A SE417928B (en) 1975-05-09 1976-05-05 PROCEDURE AND DEVICE FOR PREPARING A HALLABLE, HERMETIC WELDING BETWEEN THE PLASTIC LAYER IN A LAMINATED PLASTIC METAL BODY
GB4845577A GB1516252A (en) 1975-05-09 1976-05-07 Apparatus for sealing plastics/metal laminates
GB1894376A GB1516251A (en) 1975-05-09 1976-05-07 Method of sealing plastics/metal laminates
US05/684,942 US4097318A (en) 1975-05-09 1976-05-10 Method for sealing plastic-metal laminates
US05/885,130 US4167435A (en) 1975-05-09 1978-03-10 Apparatus for sealing plastics/metal laminates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752521234 DE2521234A1 (en) 1975-05-09 1975-05-09 Rapid development of welding pressure - used on polypropylene coated containers to obtain hermetic seals between contaminated surfaces

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Publication Number Publication Date
DE2521234A1 true DE2521234A1 (en) 1976-11-18

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Application Number Title Priority Date Filing Date
DE19752521234 Pending DE2521234A1 (en) 1975-05-09 1975-05-09 Rapid development of welding pressure - used on polypropylene coated containers to obtain hermetic seals between contaminated surfaces

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DE (1) DE2521234A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3141528A1 (en) * 1981-10-20 1983-05-11 IWK Verpackungstechnik GmbH, 7513 Stutensee Packaging machine
DE3544678A1 (en) * 1985-08-15 1987-02-26 Orihiro Co Ltd CROSS-WELDING DEVICE FOR FILLED BAGS
DE102015109499A1 (en) * 2015-06-15 2016-12-15 Plümat Plate & Lübeck GmbH & Co. Apparatus and method for producing plastic bags
CN112722465A (en) * 2021-01-08 2021-04-30 天能电池集团（安徽）有限公司 Buffer device for storage battery box filling machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3141528A1 (en) * 1981-10-20 1983-05-11 IWK Verpackungstechnik GmbH, 7513 Stutensee Packaging machine
DE3544678A1 (en) * 1985-08-15 1987-02-26 Orihiro Co Ltd CROSS-WELDING DEVICE FOR FILLED BAGS
DE102015109499A1 (en) * 2015-06-15 2016-12-15 Plümat Plate & Lübeck GmbH & Co. Apparatus and method for producing plastic bags
CN112722465A (en) * 2021-01-08 2021-04-30 天能电池集团（安徽）有限公司 Buffer device for storage battery box filling machine

Also Published As

Publication number Publication date
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