DE2538316B2 - Method and device for forming a permanently hermetic weld seam between the plastic layers of a canning container - Google Patents
Method and device for forming a permanently hermetic weld seam between the plastic layers of a canning containerInfo
- Publication number
- DE2538316B2 DE2538316B2 DE2538316A DE2538316A DE2538316B2 DE 2538316 B2 DE2538316 B2 DE 2538316B2 DE 2538316 A DE2538316 A DE 2538316A DE 2538316 A DE2538316 A DE 2538316A DE 2538316 B2 DE2538316 B2 DE 2538316B2
- Authority
- DE
- Germany
- Prior art keywords
- sealing
- pressure
- time
- period
- container
- 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- Withdrawn
Links
Classifications
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- 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
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- 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
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- 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
- B29C66/70—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
- B29C66/80—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
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- 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
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
-
- 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
-
- 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
- B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
- B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
- B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Ausbildung einer dauerhaft hermetischen Schweißnaht zwischen den Kunststoffschichten eines Kunststoff-Metallschichtkörpers, zum Verschließen großvolumiger Konservenbehältnisse auf der Grundlage von mit Polypropylen beschichteten Leichtmetallbehälterteilen unter Beaufschlagen von Druck und Wärme auf die zu verschweißenden Flächen.The invention relates to a method and a device for forming a permanently hermetic weld seam between the plastic layers a plastic-metal laminate, for closing large-volume canned food containers on the Based on light metal container parts coated with polypropylene under application of pressure and heat on the surfaces to be welded.
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 Kunststoffbeschichtet ist. Das hermetische Verschließen derartiger Behälter erfolgt durch Verbinden des Deckelrsndes mit dem Schalenrand dergestalt, daß durch Beaufschlagen mit Wärme und Druck während einer Zeitspanne die beiden Kunststoffschichten miteinander homogen verbunden werden.In the field of food preservation by heat sterilization in metal containers The use of so-called lightweight containers is becoming more and more common, especially the use of relatively large containers with a capacity of over 1000 ml. Such lightweight containers consist of a light metal foil that is coated with a heat-sealable plastic. Such containers are hermetically sealed by Connect the Deckelrsndes with the shell edge in such a way that by applying heat and Pressure during a period of time, the two plastic layers are homogeneously connected to one another.
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 daßIn such heat seals it is necessary to seal a relatively large area that is above it is also often contaminated by the filling process with the goods to be preserved and because of the Work cycle can only be roughly cleaned by wiping the operator, so that 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 HeißsiegelungAt least there is still moisture on the hydrophobic surfaces to be heat-sealed. Only when adhering closely With limited tolerances of the parameters temperature, pressure and time, it is possible to heat-seal
s einwandfrei zu gestalten.s flawlessly.
Neben der Meßbarkeit müssen die einschlägigen Werte auch einstellbar sein und die einmal eingestellten Werte dürfen sich nicht ändern, denn wenn auch nur eine sehr geringfügige Fehlstelle in der HeißsiegelnahtIn addition to the measurability, the relevant values must also be adjustable and those once set Values must not change, even if only a very minor defect in the heat-sealed seam
ίο vorliegt, führt dies unweigerlich zum Verderb des Gutes,ίο is present, this inevitably leads to the spoilage of the goods, und bis zum Feststellen derartiger Fehler kann somitand until such errors are detected can thus eine sehr erhebliche Fehlproduktion mit den sich darausa very significant defective production with the result ergebenden Konsequenzen angelaufen sein.resulting consequences.
besonderen Probleme dar, da eine Feinregulierungposes particular problems because of fine adjustment durch entsprechend angeordnete Temperaturfühlerby appropriately arranged temperature sensors eingestellt werden kann Besonders kritisch sind jedochCan be adjusted, however, are particularly critical
. die Druckbedingungen sowie der Zeitfaktor, worunter. the printing conditions as well as the time factor, including zu verstehen ist sowohl die Siegeldauer, die die Zeit istWhat is to be understood is both the sealing duration and the time die nur die Dauer des vollen konstanten Siegeldrucks umfaßt, als auch die Zeitspannen, 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 mögliwhich only includes the duration of the full, constant sealing pressure, as well as the time spans it takes to build up the heat seal pressure and until it is reduced to normal pressure are required. Within one of the kind of Plastic and temperature-dependent possible chen Siegeldruckbereiches gilt daß je höher der Druck, um so kürzer die Siegelzeit ist und die von dem Füllvorgang auf den Siegelflächen vorliegenden Verschmutzungen aus der Siegelzone um so besser herausgedrückt werden.In the sealing pressure range, the higher the pressure, the shorter the sealing time and the better the contamination from the sealing zone that is present on the sealing surfaces from the filling process be pushed out.
Nach der DE-AS 16 11 834 ist es im Zusammenhang mit dem Aufbau des Siegeldrucks und der Siegeldauer bekannt zur Regelung der Anpreßdauer der zu verschließenden Teile eines Verpackungsbehälters, zusätzlich zu einer mechanischen BetätigungseinrichAccording to DE-AS 16 11 834 it is related to the build-up of the sealing pressure and the sealing duration known for regulating the pressing time of the parts of a packaging container to be closed, in addition to a mechanical actuator tung eine steuerbare Verstelleinrichtung anzuwenden. Der gesamte Siegelvorgang, besteht aus den Zeitspannen, die den Aufbau auf den Heißsiegeldruck, die Siegeldauer und den Abbau auf den Normaldruck umschließen, verläuft sinusförmig dergestalt, daß zumdevice to use a controllable adjustment device. The entire sealing process consists of the periods of time that the heat seal pressure builds up Sealing duration and the breakdown to normal pressure enclose, runs sinusoidally in such a way that for einen relativ lange Zeitspannen für den Aufbau und den Abbau des Siegeldrucks vorliegen, sowie über die Siegeldauer kein konstanter Druck herrscht.there is a relatively long period of time for the build-up and breakdown of the sealing pressure, as well as over the Sealing time there is no constant pressure.
Auch nach der US-PS 28 25 194 erfolgt der Aufbau und der Abbau des Drucks innerhalb der SiegeldauerAccording to US Pat. No. 2,825,194, the pressure is built up and reduced within the sealing time längs einer Sinuskurve.along a sine curve.
Schließlich ist nach der CH-PS 4 64 696 eine Vorrichtung zur Ausbildung einer Schweißnaht beim Verschließen eines Verpackungsbehälters mit einem Deckel aus thermoplastischem Kunststoff bekannt, dieFinally, according to CH-PS 4 64 696, a device for forming a weld seam is at Closing a packaging container with a lid made of thermoplastic known that
so ein unteres Siegelwerkzeug zur Aufnahme eines Behälters und ein oberes Siegelwerkzeug zum Gegendrücken eines Deckels auf den Rand des Behälters aufweist, die mittels eines mechanischen Antriebs relativ aufeinander zu und voneinander weg bewegbar sind undsuch a lower sealing tool for receiving a Container and an upper sealing tool for pressing a lid onto the edge of the container which can be moved relative to and away from one another by means of a mechanical drive and deren Druck gegeneinander durch eine federnde Einrichtung begrenzbar ist.whose pressure against each other can be limited by a resilient device.
Bei dieser Vorrichtung findet eine Drucksicherung Anwendung, die vergleichbar zu dem in der erfindungsgemäßen Vorrichtung vorgesehenen DruckluftkissenIn this device, a pressure safety device is used which is comparable to the compressed air cushion provided in the device according to the invention ist, weil die hydraulische Flüssigkeit über ein Luftpolster abgegeben wird. Im Hinblick auf diesen Stand der Technik wird für die kennzeichnenden Merkmale des Vorrichtungsanspruchs lediglich Schutz im Zusammenhang mit der Durchführung des erfindungsgemäßenis because the hydraulic fluid is released through an air cushion. With regard to this state of the Technology is only protection for the characterizing features of the device claim in connection with the implementation of the invention Verfahrens nach den Verfahrensansprüchen beansprucht.Method claimed according to the method claims.
Nach dem Stand der Technik ist man bisher davon ausgegangen, daß die Parameter der Temperatur, derAccording to the prior art, it has been assumed that the parameters of the temperature, the
Zeitdauer des Beaufschlagens mit dem Siegeldruck, also die Siegeldauer, sowie die Höhe des Siegeldruckes den Versiegelungsvorgang vollinhaltlich beschreiben und somk entsprechendes Einstellen bzw. Nachstellen der einzelnen Werte in Abhängigkeit von Toleranzveränderungen zu einer optimalen Versiegelung führtDuration of the application of the seal pressure, that is the sealing duration and the level of the sealing pressure fully describe the sealing process and Somk appropriate setting or readjustment of the individual values depending on tolerance changes leads to an optimal seal
Der Erfindung liegt die Aufgabe zugrunde, die bei dieser bekannten Arbeitsweise auftretende erhebliche Ausschußquote zu reduzieren.The invention is based on the problem of the considerable that occurs in this known mode of operation To reduce the reject rate.
Diese Aufgabe wird verfahrensmäßig erfmdungcgemäß dadurch gelöst, daß der Druckaufbau auf den Siegeldruck innerhalb einer Zeitspanne erfolgt, die weniger als 20% der Siegeldauer beträgt, wobei eine erste bevorzugte Ausführungsform weniger als 10% und eine zweite bevorzugte Ausführungsform eine Zeitspanne von 3 bis 5% der Siegeldauer vorsiehtThis task is procedurally according to the invention solved in that the pressure build-up on the Sealing pressure takes place within a period of time that is less than 20% of the sealing time, with one first preferred embodiment less than 10% and a second preferred embodiment one Provides a period of 3 to 5% of the sealing duration
Im Zusammenhang mit der Durchführung dieses erfindungsgemäßen Verfahrens wird diese Aufgabe mit einer Vorrichtung gemäß dem Oberbegriff des Anspruchs 4 erfindungsgemäß dadurch gelost, daß der mechanische Antrieb aus einem Kniehebel besteht, der durch einen an seinem Kniegelenk angreifenden, durch beide Stirnwände eines Hydraulikzylinders hindurchgeführten, doppelt wirkenden Kolben wechselweise nach beiden Seiten seiner Strecklage ausknickbar istIn connection with the implementation of this method according to the invention, this object is achieved with a device according to the preamble of claim 4 according to the invention solved in that the mechanical drive consists of a toggle lever that acts on his knee joint by a double-acting piston passed through both end walls of a hydraulic cylinder can be buckled on both sides of its extended position
Durch die Erfindung wird gelehrt, daß es einen noch nicht erkannten kritischen Parameter im Zusammenhang mit dem Siegelvorgang gibt, und zwar die Zeitspanne des Druckaufbaues bis zu dem eigentlichen Siegeldruck, also bis zum Beginn der Siegeldauer.The invention teaches that there is a not yet recognized critical parameter in the context with the sealing process, namely the time span from the pressure build-up to the actual Sealing pressure, i.e. until the beginning of the sealing period.
Langwierige Untersuchungen haben gezeigt, daß die Zeitspanne des Druckaufbaues bis zum Siegeldruck nicht größer als 20% der Siegeldauer sein soll und sich vorzugsweise auf wesentlich darunter belauft, insbesondere unter 10% und ganz besonders bevorzugt auf 3 bis 5%.Lengthy investigations have shown that the time span between the pressure build-up and the sealing pressure should not be greater than 20% of the sealing time and is preferably much less, in particular below 10% and very particularly preferably to 3 to 5%.
Eine Erklärung, worauf das hiermit erzielte günstige Ergebnis letztlich zurückzuführen ist, kann nicht gegeben werden. Tatsache ist jedoch, daß die Ausschußquote gegenüber einer Verfahrensweise, bei der der Druckanstieg außerhalb des erfindungsgemäßen Bereiches liegt, wenigstens in der Größenordnung einer Zehnerpotenz niedriger liegt.An explanation of what the favorable result achieved with this is ultimately due to cannot be given are given. The fact is, however, that the reject rate is compared to a procedure in which the Pressure rise outside the range according to the invention is at least of the order of magnitude Power of ten is lower.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben. Es zeigtAn embodiment of the invention is shown in the drawings and will be described in more detail below described. It shows
F i g. 1 eine schematische Darstellung im Schnitt einer zur Durchführung des erfindungsgemäßen Verfahrens geeigneten Vorrichtung;F i g. 1 shows a schematic illustration in section of a method for carrying out the method according to the invention suitable device;
Fi g. 2 ein Druck-Zeit-Diagramm eines Siegelverfahrens nach dem Stand der Technik undFi g. 2 shows a pressure-time diagram of a sealing process according to the state of the art and
F i g. 3 ein Druck-Zeit-Diagramm des erfindungsgemäßen Verfahrens.F i g. 3 shows a pressure-time diagram of the method according to the invention.
Die eine Verfahrensweise nach dem Stand der Technik wiedergebende Fig.2 zeigt, daß sich das Verhälntis der Zeitspannen zwischen dem Aufbau bis zum Siegeldruck und der Siegeldauer auf etwa 1 :2 beläuft, so daß die Zeitspanne für den Aufbau des Siegeldrucks sich auf etwa 30% der Siegeldauer bis zum Beginn des Abbaues des Siegeldrucks beläuft.FIG. 2, which shows a procedure according to the prior art, shows that the The ratio of the time between the build-up to the sealing pressure and the sealing time to about 1: 2 amounts to about 30% of the sealing time up to The beginning of the reduction of the sealing pressure amounts to.
Die das erfindungsganiäße Verfahren wiedergebende Fig.3 zeigt, daß hier im Gegensatz zu der in etwa trapezförmigen Druck-Zeitkurve nach der F i g. 2 eine fast rechteckige Kurve vorliegt, und die Fig.3 zeigt insbesondere die bevorzugte Ausführungsform, wonach sich die Zeitspanne bis zum Erreichen des Siegeldrucks im Verhältnis zu der Siegeldauer auf etwa 5% beläuftThe method reproducing the process according to the invention Fig.3 shows that here in contrast to the approximately trapezoidal pressure-time curve according to FIG. 2 there is an almost rectangular curve, and FIG. 3 shows in particular the preferred embodiment, according to which the period of time until the sealing pressure is reached in relation to the sealing time amounts to about 5%
Ein Beispiel einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens ist in der F i g. 1An example of a device for carrying out the method according to the invention is shown in FIG. 1
ίο wiedergegeben. Es liegt hierbei ein oberes Grundgestell la, ein unteres Grundgestell \b, eine obere Gestellplatte 2a, die ein oberes Siegelwerkzeug 3a trägt, eine untere Gestellplatte 2b, die ein unteres Siegelwerkzeug 36 trägt, vor. Ein Kniehebel 4 ist an seinem oberen Ende an einem in dem oberen Grundgestell la geführten Gestänge angelenkt, das die untere Gestellplatte 2b mit dem unteren Siegelwerkzeug 3b trägt und es ist weiterhin an seinem unteren Ende an einem in dem unteren Grundgestell \bgeführten Gestänge angelenkt, das mit dem Kolben 5 eines Luftzylinders 6 in Verbindung steht. Der Antrieb des Kniehebels 4 erfolgt durch einen Hydraulikzylinder 7, wobei der Kolben durch beide Stirnwände des Zylinders durchgehend ausgebildet ist.ίο reproduced. There is an upper base frame la, a lower base frame \ b, an upper frame plate 2a, which carries an upper sealing tool 3a, and a lower frame plate 2b, which carries a lower sealing tool 36. A toggle lever 4 is articulated at its upper end to a linkage guided in the upper base frame la, which carries the lower frame plate 2b with the lower sealing tool 3b and it is also articulated at its lower end to a linkage guided in the lower base frame \ b, which is in communication with the piston 5 of an air cylinder 6. The toggle lever 4 is driven by a hydraulic cylinder 7, the piston being formed continuously through both end walls of the cylinder.
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 15° vor der gestreckten Lage des Kniehebels fährt das untere Siegelwerkzeug 3b gegen das feststehende obere Siegelwerkzeug 3a. Die hier genannte Gradzahl ist nur beispielsweise zu verstehen, die Anordnung kann so eingestellt werden, daß die Berührung der beiden Siegelwerkzeuge 3a, 3b in einem Winkelbereich des Kniehebels 4 von 5 bis 20° erfolgt.In the starting position, the toggle lever 4 is approximately 45 ° to the extended central position. When a work cycle is triggered, the toggle lever 4 is stretched and the lower sealing tool 3b is moved in the direction of the upper sealing tool 3a. The lower sealing tool 3b moves against the stationary upper sealing tool 3a approximately 15 ° in front of the extended position of the toggle lever. The number of degrees mentioned here is only to be understood as an example; the arrangement can be set so that the two sealing tools 3a, 3b come into contact in an angular range of the toggle lever 4 of 5 to 20 °.
Zu diesem Zeitpunkt beginnt der eigentliche Siegelvorgang, d. h. die Siegelzeit, durch den plötzlichen Druckaufbau gegen den Luftzylinder 6, der unter einem vorgegebenen Druck stehtAt this point the actual sealing process begins, d. H. the sealing time, due to the sudden build-up of pressure against the air cylinder 6, which is under a given pressure
Somit braucht weder in dem Luftzylinder 6 noch in dem Hydraulikzylinder 7 aufgrund des günstigen Übersetzungsverhältnisses des Kniehebels 4 ein Druck aufgebaut zu werden. Die Siegelzeit dauert solange, bisThus, neither in the air cylinder 6 nor in the hydraulic cylinder 7 due to the favorable Transmission ratio of the toggle lever 4 a pressure to be built up. The sealing time lasts until
« der Kniehebel durch seine gestreckte Lage unter Ausknicken bis etwa 15° zu der anderen Seite gefahren ist. Sodann ist die Siegeldauer 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 45° zur gestreckten Mittellage, aus der der Ausgangslage gegenüberliegenden Lage vorliegt, ist dann das untere Siegelwerkzeug 3b wieder in die Ausgangslage abgesenkt. Der nächste Siegelvorgang wird durch Rücklauf des Kolbens des Hydraulikzylinders 7 inganggesetzt, wodurch der Kniehebel 4 dann in die ursprüngliche Lage erneut ausgeknickt wird.«The toggle lever has moved to the other side through its extended position, buckling up to about 15 °. The sealing time is then ended, the piston 5 of the air cylinder 6 is again in the original position, and when the hydraulic cylinder 7 continues to travel to its end position, the toggle lever 4 then being approximately 45 ° to the extended central position, from the position opposite the starting position , the lower sealing tool 3b is then lowered back into the starting position. The next sealing process is started by the return of the piston of the hydraulic cylinder 7, as a result of which the toggle lever 4 is then bent again into its original position.
Durch den durchgehenden Kolben des Hydraulikzylinders ergeben sich bei Vor- und Rücklauf gleich große Kolbenflächen und somit gleiche Geschwindigkeiten.Due to the continuous piston of the hydraulic cylinder, the flow and return flow are the same Piston areas and thus the same speeds.
Claims (4)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2538316A DE2538316B2 (en) | 1975-08-26 | 1975-08-26 | Method and device for forming a permanently hermetic weld seam between the plastic layers of a canning container |
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. |
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 |
GB1894376A GB1516251A (en) | 1975-05-09 | 1976-05-07 | Method of sealing plastics/metal laminates |
GB4845577A GB1516252A (en) | 1975-05-09 | 1976-05-07 | Apparatus for 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 |
---|---|---|---|
DE2538316A DE2538316B2 (en) | 1975-08-26 | 1975-08-26 | Method and device for forming a permanently hermetic weld seam between the plastic layers of a canning container |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2538316A1 DE2538316A1 (en) | 1977-03-10 |
DE2538316B2 true DE2538316B2 (en) | 1981-05-21 |
Family
ID=5955056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2538316A Withdrawn DE2538316B2 (en) | 1975-05-09 | 1975-08-26 | Method and device for forming a permanently hermetic weld seam between the plastic layers of a canning container |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2538316B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011105513A1 (en) * | 2011-06-24 | 2012-12-27 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Method and sealing station for sealing packaging |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1611834C2 (en) * | 1951-01-28 | 1974-04-18 | Bellaplast Gmbh, 6202 Wiesbadenbiebrich | Welding or sealing device |
US2825194A (en) * | 1953-11-04 | 1958-03-04 | Jack C Page | Device for applying heat sealing film |
DE1627929A1 (en) * | 1967-09-18 | 1971-10-07 | Kieserling & Albrecht | Press with hydro-mechanical drive |
-
1975
- 1975-08-26 DE DE2538316A patent/DE2538316B2/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011105513A1 (en) * | 2011-06-24 | 2012-12-27 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Method and sealing station for sealing packaging |
US9266635B2 (en) | 2011-06-24 | 2016-02-23 | Multivac Sepp Haggenmueller Gmbh & Co. Kg | Method and sealing station for sealing packaging units |
Also Published As
Publication number | Publication date |
---|---|
DE2538316A1 (en) | 1977-03-10 |
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