DE2537728A1 - CONTINUOUSLY WORKING WELDING DEVICE FOR SEALING FILLED PLASTIC BAGS OR THE SAME - Google Patents

CONTINUOUSLY WORKING WELDING DEVICE FOR SEALING FILLED PLASTIC BAGS OR THE SAME

Info

Publication number
DE2537728A1
DE2537728A1 DE19752537728 DE2537728A DE2537728A1 DE 2537728 A1 DE2537728 A1 DE 2537728A1 DE 19752537728 DE19752537728 DE 19752537728 DE 2537728 A DE2537728 A DE 2537728A DE 2537728 A1 DE2537728 A1 DE 2537728A1
Authority
DE
Germany
Prior art keywords
seam
sack
sealing
sealing seam
cooling
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
DE19752537728
Other languages
German (de)
Inventor
Mathias Mueller
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.)
Haver and Boecker OHG
Original Assignee
Haver and Boecker OHG
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 Haver and Boecker OHG filed Critical Haver and Boecker OHG
Publication of DE2537728A1 publication Critical patent/DE2537728A1/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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1445—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface heating both sides of the joint
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface radiating the edges of the parts to be joined, e.g. for curing a layer of adhesive placed between two flat parts to be joined, e.g. for making CDs or DVDs
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1464—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators
    • B29C65/1467—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous welding
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7861—In-line machines, i.e. feeding, joining and discharging are in one production line
    • B29C65/787—In-line machines, i.e. feeding, joining and discharging are in one production line using conveyor belts or conveyor chains
    • B29C65/7873—In-line machines, i.e. feeding, joining and discharging are in one production line using conveyor belts or conveyor chains using cooperating conveyor belts or cooperating conveyor chains
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/137—Beaded-edge joints or bead seals
    • 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
    • B29C66/343—Making tension-free or wrinkle-free joints
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • 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
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • 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
    • B65B51/32—Cooling, or cooling and pressing, package closures after heat-sealing
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Description

PatentanwältePatent attorneys

X)T. O. Loesenbeck X) T. O. Loesenbeck

Dipl -mg- Stracke Dipl-lng.Loesenb8cKDipl-mg- Stracke Dipl-lng.Loesenb8cK

48 »feld, Herferfer Straße 1748 »field, Herferfer Strasse 17

Haver & Boecker, 4740 Oelde 1, Carl-Haver-PlatzHaver & Boecker, 4740 Oelde 1, Carl-Haver-Platz

Kontinuierlich arbeitende Schweißvorrichtung zum Verschließen von gefüllten Kunststoffsäcken oder dergleichenContinuously working welding device for closing filled Plastic bags or the like

Die Erfindung bezieht sich auf eine kontinuierlich arbeitende Schweißvorrichtung zum VerschHessen von gefüllten Kunststoffsäcken oder dergleichen.The invention relates to a continuously operating welding device for sealing filled Plastic bags or the like.

Die bekannten Schweißvorrichtungen unterscheiden sich hauptsächlich in der Art des Schweißverfahrens und den verschiedenartigen Ausführungen der Transportsysteme, die für den Transport des zu verschliessenden Sackrandes benötigt werden.The known welding devices differ mainly in the type of welding process and the various types Versions of the transport systems that are required for transporting the edge of the bag to be closed will.

Unabhängig von dem unterschiedlichen Schweißverfahren dieser Vorrichtung haben sie eine gemeinsame Punktion, die darin besteht, daß fffür die Herstellung der Verschlußnaht verschiedenartige federnde Druckelemente verwendet werden. Beispielsweise werden u.a. umlaufende Stahlbänder verwendet, die mit Teflon (eingetr. Warenzeichen) beschichtet sind und die zumRegardless of the different welding process this Device they have a common puncture, which consists in that different types of resilient pressure elements are used for the production of the sealing seam. For example circumferential steel strips are used, which are coated with Teflon (registered trademark) and which are used for

609815/0380609815/0380

Schweißen benötigte Wärme unter Anwendung von Federdruck auf die Folie Obertragen. In einem anderen Fall wird der Folienrand im aufgespreizten Zustand vorgeheizt und mit Preßrollen zusammengedrückt, bevor die eigentliche Verschweißung erfolgt, wonach anschliessend die Schweißnaht nochmals zwischen federnd angedrückten Kühlketten zusammengepreßt wird. Bei andersartigen Ausführungen wird die Verschlußnaht vor oder nach dem Kühlen mittels Preßrollen zusammengepreßt.Welding transferring the heat required to the foil using spring pressure. In another case it will be the edge of the foil preheated in the expanded state and with pressure rollers pressed together before the actual welding takes place, after which the weld seam is again between resilient pressed cold chains is pressed together. In other designs, the sealing seam is before or after cooling pressed together by means of pressure rollers.

In den Absackbetrieben bereiten diese Schweißvorrichtungen oftmals Schwierigkeiten, die hauptsächlich darin bestehen, daß bei der Herstellung einer Verschlußnaht unter Verwendung von federnden Druckelementen die Gefahr nicht auszuschließen ist, daß die Folie im Bereich der Verschlußnaht mechanisch geschwächt wird und die erforderliche Belastbarkeit der Verschlußnaht nicht immer gewährleistet ist. Außer, daß die Anforderungen an die Verschlußnaht in bezug auf eine hohe Belastbarkeit und dauerhafte Haltbarkeit gestiegen sind, ist die Forderung gestellt, bei der mechanischen Verarbeitung von Kunststoffsäcken kosteneinsparende Losungen im Materialverbrauch zu finden.In the bagging plants these welding devices often cause difficulties, which mainly consist in that when producing a sealing seam using resilient pressure elements, the risk cannot be ruled out, that the film is mechanically weakened in the area of the sealing seam and the required load-bearing capacity of the sealing seam is not always guaranteed. Except that the requirements for the sealing seam in terms of a high load capacity and Long-term durability has increased, the requirement is made in the mechanical processing of plastic sacks to find cost-saving solutions in material consumption.

Der Erfindung liegt die Aufgfeabe zugrunde, mit einem vereinfachten Schweißverfahren die Belastbarkeit und Haltbarkeit der Verschlußnähte von Kunststoffsäcken zu verbessern, die infolge hoher Gewichtsbelastungen beim Verladen und Transport starken dynamischen sowie statischen Belastungen beim Lagern der Säcke ausgesetzt sind.The invention is based on the object, with a simplified one Welding process the resilience and durability to improve the sealing seams of plastic bags, the due to high weight loads during loading and transport, strong dynamic and static loads during storage the bags are exposed.

Außerdem hat sich die Erfindung die Aufgabe gestellt, das Transportsystem für den zu verschweißenden Sackrand so zu gestalten, daß im Bereich des überstehenden Sackrandes oberhalb des Produktes eine Materialeinsparung in bezug auf die Sacklänge erreicht wird.In addition, the invention has the task of adjusting the transport system for the sack edge to be welded design that in the area of the protruding sack edge above the product, a material saving in relation to the Bag length is reached.

809815/0350809815/0350

Die Aufgabe wird nach der Erfindung dadurch gelöst, daß bei der Anbringung der Verschlußnaht an den gefüllten Kunststoffsack der Sackrand von 2 synchron angetriebenen Transportketten gefördert, in bekannter Weise besäumt, auf eine Schweißstation ohne Anpreßdruck verschweißt, beim Austritt aus der Schweißstation von Führungsrollen geleitet, einer Kühlstation zugeführt wird, deren Führungsketten quer zur Förderrichtung einen Luftspalt aufweisen, in welchem sich die Verschlußnaht im Querschnitt spannungslos ausdehnen kann und durch Einwirkung von oberhalb der Verschlußnaht ausströmender Kühlluft eine Schrumpfnaht gebildet wird, deren Querschnitt ein Mehrfaches der Folienstärke beträgt und sich durch eine hohe Belastbakrkeit und dauerhafte Haltbarkeit auszeichnet.The object is achieved according to the invention in that when attaching the sealing seam to the filled plastic bag the edge of the sack conveyed by 2 synchronously driven transport chains, trimmed in a known manner, to a welding station Welded without contact pressure, guided by guide rollers when exiting the welding station, a cooling station is fed, the guide chains of which have an air gap transversely to the conveying direction, in which the sealing seam is located can expand without tension in the cross-section and by action a shrink seam is formed from cooling air flowing out above the sealing seam, the cross section of which is a multiple the film thickness and is characterized by a high load capacity and long-term durability.

Eine weitere Aufgabe wird nach der Erfindung dadurch gelöst, daß der Sackrand ausschließlich von 2 miteinander synchron angetriebenen Transportketten, über den gesamten Transportweg der Schweißvorrichtung gefördert und die Verschlußnaht mit geringem Abstand oberhalb dieser Transportketten geschweißt, geführt und gekühlt wird, bilden die Grundplatten unterhalb der Transportketten die untere Begrenzung für den Bereich des Sackrandes, der für den Transport durch die Schweißvorrichtung einschließlich der anzubringenden Verschlußnaht benötigt wird und infolge dieser niedrigen Bauweise eine Materialeinsparung in bezug auf die Sacklänge ermöglicht.A further object is achieved according to the invention in that the sack edge is synchronized with one another exclusively by two driven transport chains, conveyed over the entire transport path of the welding device and the sealing seam with The base plates are welded, guided and cooled at a small distance above these transport chains of the transport chains, the lower limit for the area of the sack edge that is used for transport through the welding device including the sealing seam to be attached is required and, as a result of this low design, a material saving in relation to the sack length.

Erfindungsgemäß wird für die Herstellung der Verschlußnaht vorzugsweise Strahlungswärme verwendet, welche im Bereich der Schweißnaht von außen auf den besäumten Sackrand ausgestrahlt wird und die aneinanderliegenden Innenrlächen des Sackrandes miteinander in einem Schweißvorgang vollständig verschweißt.According to the invention for the production of the sealing seam preferably radiant heat is used, which is radiated from the outside onto the trimmed sack edge in the area of the weld seam and the adjacent inner surfaces of the sack edge are completely welded together in one welding process welded.

609815/0350609815/0350

Erfindungsgemäß können mit dieser Vorrichtung außer Flachsäcken auch Seitenfaltensäcke in gleicher Weise mit einer Verschlußnaht verschweißt werden.According to the invention, in addition to flat bags, this device can be used gusseted sacks can also be welded with a sealing seam in the same way.

Ferner sieht diese Erfindung vor, daß die Stärke der Schrumpf naht durch einen einstellbaren Luftspalt zwischen den beiden Führungsketten und durch Dosierung des Luftdruckes sowie der Kühlluftmenge, die aus einem Rohr ausgeblasen, die Kühlung der Verschlußnaht und gleichzeitig die Schrumpfung bewirkt, variiert werden kann.Further, this invention contemplates that the strength of the shrinkage is approaching by an adjustable air gap between the two guide chains and by metering the air pressure and the Amount of cooling air blown out of a pipe, the cooling the sealing seam and at the same time causing the shrinkage, can be varied.

Ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung ist in den Zeichnungen dargestellt und wird im folgenden beschrieben.An embodiment of the device according to the invention is shown in the drawings and is described below.

Es zeigeniShow it

Fig. 1 die Vorrichtung in Vorderansicht,Fig. 1 the device in front view,

Fig. 2 die Vorrichtung im Grundriß,2 shows the device in plan,

Fig. 3 einen Schnitt nach der Linie I-I in Fig. 2,Fig. 3 is a section along the line I-I in Fig. 2,

Fig. 4 einen Schnitt nach der Linie II-II in Fig. 2,Fig. 4 is a section along the line II-II in Fig. 2,

Fig. 5 einen Schnitt nach der Linie III-III in Fig. 2,Fig. 5 is a section along the line III-III in Fig. 2,

Fig. 6 eine Schrumpfnaht im Querschnitt.6 shows a shrink seam in cross section.

Die erfindungsgemäße Vorrichtung besteht im wesentlichen aus den in Fig. 1 und 2 dargestellten Transportketten 1 und 2, die an der Auslaufseite B der Vorrichtung von einem nicht dargestellten Antrieb in Pfeilrichtung A über die gegenläufigen Zweifach-Kettenräder 3 und 4 synchron angetrieben und an der Einlaufseite A mittels der Spannräder 5 und 6 gespannt werden. Die Transportgeschwindigkeit dieser Vorrichtung ist mit der Fördergeschwindigkeit des nicht dargestellten Transportbandes synchronisiert, welches die gefüllten Säcke fördert.The device according to the invention consists essentially of the transport chains 1 and 2 shown in Fig. 1 and 2, which are not on the outlet side B of the device Drive shown in the direction of arrow A via the opposing double chain wheels 3 and 4 driven synchronously and be tensioned on the inlet side A by means of the tensioning wheels 5 and 6. The transport speed of this device is synchronized with the conveying speed of the conveyor belt, not shown, which conveys the filled sacks.

$098-15/0350$ 098-15 / 0350

In Fig. 3 dargestellt werden die Transportketten 1 und 2 von Kettenschienen 7 und 8 geführt, die auf einer Seite starr auf der Grundplatte 9 und auf der anderen Seite der Grundplatte 10 federnd angebracht sind, so daß der Sackrand 11 durch den auf die Transportketten ausgeübten Federdruck über den gesamten Transportweg schlupffrei transportiert wird. Die Besäumung des Sackrandes 11 erfüLgt in bekannter Weise mit einer Besäumvorrichtung, die in Fig. lund 2 dargestellt, aus einem Messe* 12 und einem Riementrieb 13 besteht, dessen Antriebsrolle 14 von der Transportkette 2 über ein Zahnritzel 15 angetrieben wird und über den Riemen 13 die umlaufende Rolle 16 antreibt. Der abgetrennte Randstreifen 17 wird von dem Riemen 13 seitlich der Vorrichtung ausgetragen. Fig. 1 zeigt die Oberkante 18 des Sackrandes 11 vor dem Besäumen und die Oberkante 19 nach dem Besäumen. Der besäumte Sackrand 11 wird dann durch die Schweißstation 20 transportiert und durch die von zwei Strahlungsheizkörpern und 22 ausgestrahlte Wärme derart verschweißt, daß die aneinander liegenden Innenflächen des Sackrandes 11 im Bereich der Verschlußnaht 23 miteinander vollständig verschmelzen, wie in Fig. 6 gezeigt.In Fig. 3, the transport chains 1 and 2 are guided by chain rails 7 and 8, which are rigid on one side the base plate 9 and on the other side of the base plate 10 are resiliently mounted so that the bag edge 11 through the The spring pressure exerted on the transport chains is transported over the entire transport path without slipping. The trimming of the sack edge 11 fulfilled in a known manner with a trimming device, which is shown in Fig. 1 and 2, from a mess * 12 and a belt drive 13, the drive roller 14 of which is driven by the transport chain 2 via a pinion 15 and drives the rotating roller 16 via the belt 13. The severed one Edge strip 17 is carried out from the belt 13 to the side of the device. Fig. 1 shows the upper edge 18 of the sack rim 11 before trimming and the top edge 19 after trimming. The trimmed bag edge 11 is then passed through the welding station 20 transported and welded by the radiated heat from two radiant heaters 22 and 22 that the to each other lying inner surfaces of the bag edge 11 in the area of the sealing seam 23 completely fuse with one another, as shown in FIG. 6.

Beim Austritt der Verschlußnaht 23 aus der Schweißstation 20 wird diese von zwei Führungsrollen 24 und 25 geleitet, die von den Transportketten 1 und 2 mittels Kettenrädern 26 und 27 angetfcieben und mit einem Abstand 40 zueinander einstellbar sind, um fd zu gewährleisten, daß die Verschlußnaht von den Rollen gefhührt wird, ohne daß diese Rollen einen Anpreßdruck auf die Verschlußnaht ausüben. Siehe hierzu Fig. 1,2 und 4.When the sealing seam 23 emerges from the welding station 20, it is guided by two guide rollers 24 and 25, which are guided by the transport chains 1 and 2 by means of sprockets 26 and 27 and are adjustable at a distance 40 from one another in order to ensure that the sealing seam is removed from the rollers is performed without these rollers exerting pressure on the sealing seam. See Figs. 1, 2 and 4.

Die Führungsrollen 24 und 25 sind an den Hebeln 36 und 37 befestigt und verschwenkbar gelagert, um diese in Langlöchern 38 und 39 im Abstand einstellen zu können.The guide rollers 24 and 25 are attached to the levers 36 and 37 and pivotably mounted in order to place them in elongated holes 38 and 39 to be able to adjust the distance.

609815/0350609815/0350

Im weiteren Arbeitsverlauf wird die Verschlußnaht 23 durch die in Fig. 2 und 5 dargestellte Kühlstation 41 transportiert, wobei die Verschlußnaht zwischen den beiden von den Zweifach-Kettenrädern 3 und 4 synchron angetriebenen und von den beiden Spannrädern 28 und 29 ausgespannten Führungsketten 30 und 31 geführt und durch die aus Düsen des Blasrohres 32 ausströmende Kühlluft gekühlt, sich in den Luftspalt 33 spannungslos ausdehnt. Die Stärke der Schrumpfnaht 23, die hierbei entsteht, läßt sich durch den einstellbaren Luftspalt 33 und der Dosierung des Luftdruckes sowie der Kühlluftmenge variieren. Die Einstellung des Luftspaltes 33 erfolgt in den JLanglöchern der Kettenschienen 34 und 35, die den Führungsketten 30 und 31 als Führung dienen.In the further course of the work, the sealing seam 23 is transported through the cooling station 41 shown in FIGS. 2 and 5, wherein the sealing seam between the two synchronously driven by the double chain wheels 3 and 4 and by the two Tensioning wheels 28 and 29 stretched out guide chains 30 and 31 and guided through the outflow from the nozzles of the blowpipe 32 Cooling air cooled, in the air gap 33 without tension expands. The strength of the shrink seam 23 that arises here can be determined by the adjustable air gap 33 and the dosage the air pressure and the amount of cooling air vary. The air gap 33 is set in the elongated holes in the Chain rails 34 and 35, which serve as guides for the guide chains 30 and 31.

60981 5/035060981 5/0350

Claims (4)

PatentansprücheClaims l.j Kontinuierlich arbeitende Schweißvorrichtung zum Verschliesien von gefüllten Kunststoffsäcken oder dergleichen, dadurch gekennzeichnet, daß bei der Herstellung der Verschlußnaht des gefüllten Sackes der Sackrand von zwei synchron angetriebenen Transportketten (1) und (2) gefördert, in bekannter Weise besäumt, auf einer Schweißstation (20) ohne Anpreßdruck, beim Austritt aus der Schweißstation von Führungsrollen (24) und (25) geleitet, einer Kühlstation (41) zugeführt wird, deren Führungsketten (30) und (31) einen Luftspalt (33) aufweisen, in welchem sich die Verschlußnaht (23) im Querschnitt spannungslos ausdehnen kann und durch Einwirkung von oberhalb der Verschluß« naht aus einem Blasrohr (32) ausströmende Kühlluft, eine Schrumpfnaht gebildet wird, deren Querschnitt ein Mehrfaches der Folienstärke beträgt.l.j Continuously working welding device for sealing of filled plastic bags or the like, thereby characterized in that during the production of the sealing seam of the filled sack, the sack edge is driven by two synchronously Transport chains (1) and (2) promoted, trimmed in a known manner, on a welding station (20) without contact pressure when The exit from the welding station is guided by guide rollers (24) and (25), fed to a cooling station (41), the guide chains (30) and (31) of which have an air gap (33) in which the sealing seam (23) expand without tension in cross section can and by action from above the lock " seams cooling air flowing out of a blowpipe (32), a shrink seam is formed, the cross-section of which is a multiple of the film thickness amounts to. 2. Kontinuierlich arbeitende Schweißvorrichtung zum Verschließen von gefüllten Kunststoffsäcken oder dergleichen, dadurch gekennzeichnet, daß der Sackrand des gefüllten Sackes durch die, von zwei Strahlungsheizkörpern (21,22) ausgestrahlte Wärme derart verschweißt wird, daß die aneinanderliegenden Innenflächen des Sackrandes im Bereich der Verschlußnaht miteinander vollständig verschweißen.2. Continuously operating welding device for closing filled plastic bags or the like, characterized in that that the sack edge of the filled sack by the, from two radiant heaters (21,22) radiated heat in such a way is welded so that the adjacent inner surfaces of the sack edge in the area of the sealing seam are completely together weld. 3. Vorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Stärke der Schrumpfnaht (23) durch einen einstellbaren Luftspalt (33) zwischen den beiden Führungsketten (30) und (31) durch Dosierung des Luftdruckes sowie der Kühlmenge,3. Device according to claims 1 and 2, characterized in that that the strength of the shrink seam (23) through an adjustable air gap (33) between the two guide chains (30) and (31) by metering the air pressure and the amount of cooling, 609815/0350609815/0350 die aus einem Blasrohr (32) ausströmt, die Kühlung der Verschlußnaht und gleichzeitig die Schrumpfung bewirkt, variiert werden kann.which flows out of a blowpipe (32), the cooling of the sealing seam and at the same time causes the shrinkage, can be varied. 4. Vorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß mit dieser Vorrichtung außer Flachsäcke auch Seitenfaltensäcke in gleicher Weise mit einer Schrumpfnaht verschweißt werden können.4. Device according to claims 1 and 2, characterized in that that with this device, in addition to flat bags, gusseted bags in the same way with a shrink seam can be welded. 609815/0350609815/0350
DE19752537728 1974-10-04 1975-08-25 CONTINUOUSLY WORKING WELDING DEVICE FOR SEALING FILLED PLASTIC BAGS OR THE SAME Pending DE2537728A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB43241/74A GB1509708A (en) 1974-10-04 1974-10-04 Method of and apparatus for sealing filled plastics bags or the like plastics containers by welding

Publications (1)

Publication Number Publication Date
DE2537728A1 true DE2537728A1 (en) 1976-04-08

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Application Number Title Priority Date Filing Date
DE19752537728 Pending DE2537728A1 (en) 1974-10-04 1975-08-25 CONTINUOUSLY WORKING WELDING DEVICE FOR SEALING FILLED PLASTIC BAGS OR THE SAME

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Country Link
BR (1) BR7506459A (en)
DE (1) DE2537728A1 (en)
FR (1) FR2286756A1 (en)
GB (1) GB1509708A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984001351A1 (en) * 1982-09-30 1984-04-12 Joker System Ab Method and device for sealing packages of thermoplastic material
DE102006021850A1 (en) * 2006-05-09 2007-11-15 Haver & Boecker Ohg Filling machine for open, weldable bags

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE50192B1 (en) * 1979-09-14 1986-03-05 Grace W R & Co Process and apparatus for packing commodities in bags of heat-sealable plastics material
US4362593A (en) * 1980-11-17 1982-12-07 Nordson Corporation Walking-beam band sealer
IT1139497B (en) * 1981-10-06 1986-09-24 Grace Italiana Spa PROCESS AND EQUIPMENT FOR SEALING PACKAGES AND / OR PACKAGES
US10029407B2 (en) 2014-12-04 2018-07-24 Big Heart Pet, Inc. Apparatus, processes, and systems for heat sealing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984001351A1 (en) * 1982-09-30 1984-04-12 Joker System Ab Method and device for sealing packages of thermoplastic material
DE102006021850A1 (en) * 2006-05-09 2007-11-15 Haver & Boecker Ohg Filling machine for open, weldable bags
US7861499B2 (en) 2006-05-09 2011-01-04 Haver & Boecker Ohg Filling machine for open, sealable sacks

Also Published As

Publication number Publication date
FR2286756B1 (en) 1978-07-28
GB1509708A (en) 1978-05-04
FR2286756A1 (en) 1976-04-30
BR7506459A (en) 1976-08-10

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