DE10005020A1 - Thermoplastics welding equipment for production of tubular bags from plastic film has a heat sealing band on a deformable support - Google Patents

Thermoplastics welding equipment for production of tubular bags from plastic film has a heat sealing band on a deformable support

Info

Publication number
DE10005020A1
DE10005020A1 DE2000105020 DE10005020A DE10005020A1 DE 10005020 A1 DE10005020 A1 DE 10005020A1 DE 2000105020 DE2000105020 DE 2000105020 DE 10005020 A DE10005020 A DE 10005020A DE 10005020 A1 DE10005020 A1 DE 10005020A1
Authority
DE
Germany
Prior art keywords
heat seal
hollow body
seal tape
hollow
jaw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE2000105020
Other languages
German (de)
Inventor
Alexander Epp
Walter Baur
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.)
Rovema GmbH
Original Assignee
Rovema GmbH
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 Rovema GmbH filed Critical Rovema GmbH
Priority to DE2000105020 priority Critical patent/DE10005020A1/en
Publication of DE10005020A1 publication Critical patent/DE10005020A1/en
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/224—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip being a resistive ribbon, a resistive band or a resistive strip
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/229—Heated wire resistive ribbon, resistive band or resistive strip characterised by the means for tensioning said heated wire, resistive ribbon, resistive band or resistive strip
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • 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
    • B29C66/40—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
    • 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
    • B29C66/81—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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—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 being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • 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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81455—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic 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
    • B29C65/38—Impulse heating
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/81411—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • 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
    • B29C66/922—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 measuring the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9221—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 measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power

Abstract

The welding head has a supporting cheek(3) with an electrically heated sealing band(5) for melting the plastic by contact. The sealing band is mounted on an elastically deformable hollow member(6) connected to the cheek.

Description

Die Erfindung betrifft eine Vorrichtung zum Verschweissen von thermoplastischem Kunststoff, insbesondere von Folienschläuchen an Schlauchbeutelmaschinen, mit einem Backenkörper und einem Heisssiegelband an einem Siegelbereich des Backenkörpers, wobei das Heisssiegelband mittels elektrischen Stromes aufheizbar ist, um einen mit dem Heisssiegelband in Wärmekontakt befindlichen Kunststoff aufzuschmelzen und zu verschweissen.The invention relates to a device for welding thermoplastic Plastic, especially of film tubes on tubular bag machines, with a jaw body and a heat seal tape on a sealing area of the Cheek body, the heat seal tape being heatable by means of electric current, around a plastic that is in thermal contact with the heat seal tape to melt and weld.

Derartige Vorrichtungen sind hinlänglich bekannt. Das Heisssiegelband ist im allgemeinen als sogenanntes Impulsband ausgeführt. Es wird kurzzeitig von Strom durchflossen, wodurch es sehr schnell erwärmt wird. Es besteht bei einer bekannten Vorrichtung aus einem Metall und ist relativ dünn. Der zu verschweissende Kunststoff wird zwischen zwei Backenkörpern eingeklemmt und von beiden Seiten mittels eines Impulsbandes kurzzeitig erwärmt und aufgeschmolzen. Die Wärme der Impulsbänder wird hauptsächlich an den Kunststoff abgegeben, wodurch die Impulsbänder relativ schnell wieder abkühlen, bevor die Backenkörper wieder voneinander wegbewegt werden.Such devices are well known. The heat seal tape is in the generally carried out as a so-called pulse band. It is short of electricity flows through, which heats it up very quickly. It exists in a known one Device made of a metal and is relatively thin. The plastic to be welded is clamped between two jaw bodies and from both sides by means of a Pulse band briefly warmed up and melted. The warmth of the pulse bands is mainly released to the plastic, making the impulse bands relative cool down quickly before the jaws move away from each other become.

Bei der Erzeugung von sogenannten Seitenfaltenbeuteln wird mit den Heisssiegelbändern ein Folienschlauch quer zu seiner Transportrichtung verschweisst, wobei unterschiedlich viele Folienlagen zwischen den beiden Backenkörpern vorkommen. Während an den Enden des zusammengedrückten Folienschlauches vier Lagen der Folie aufeinander liegen, kommen im Bereich zwischen diesen Enden zwei aufeinander liegende Lagen und in der Mitte, im Bereich der Längsnaht des Folienschlauches, drei oder vier Lagen vor, je nachdem, ob eine Überlappungsnaht oder eine Flossennaht als Längsnaht vorgesehen ist. Je mehr Folienlagen lokal zwischen zwei Backenkörpern eingeklemmt sind, um so höher ist dort der Druck. Dies bedeutet, dass in einem Bereich mit lediglich zwei Lagen der Druck verringert und damit die Wärmeeinbringung in den Kunststoff sowie der Verschweissvorgang benachteiligt sind.When creating so-called gusseted bags with the Heat sealing tapes a film tube welded transversely to its transport direction, with different layers of film between the two jaw bodies occurrence. While at the ends of the compressed film tube four Layers of the film lie on top of each other, there are two in the area between these ends superimposed layers and in the middle, in the area of the longitudinal seam of the Foil tube, three or four layers before, depending on whether there is an overlap seam or a fin seam is provided as a longitudinal seam. The more layers of film locally are jammed between two jaw bodies, the higher the pressure there. This means that in an area with only two layers the pressure is reduced and thus the introduction of heat into the plastic and the welding process are disadvantaged.

Es kann vorkommen, dass in einer zu verschweissenden Naht eines Folienschlauches ein zu verpackendes Produkt eingeschlossen wird. Dann besteht die Gefahr einer Schädigung des Heisssiegelbandes an der Stelle des Produkteinschlusses infolge des dort auftretenden, sehr hohen Druckes.It can happen that in a seam of a film tube to be welded a product to be packaged is included. Then there is a risk of Damage to the heat seal tape at the point of product inclusion as a result of very high pressure occurring there.

Der Erfindung liegt die Aufgabe zu Grunde, bei einer Vorrichtung der eingangs beschriebenen Art, den entlang eines Heisssiegelbandes herrschenden Siegeldruck auszugleichen.The invention is based on the object in a device of the beginning described type, the seal pressure prevailing along a heat seal tape compensate.

Gelöst ist die Aufgabe gemäss dem kennzeichnenden Teil des Anspruchs 1. Danach ist das Heisssiegelband an einem deformierbaren, rückstellbaren Hohlkörper vorgesehen, und der Hohlkörper ist mit dem Backenkörper verbunden.The task is solved according to the characterizing part of claim 1. After that is the heat seal tape on a deformable, resettable hollow body provided, and the hollow body is connected to the jaw body.

Die erfindungsgemässe Vorrichtung hat den Vorteil, dass sowohl bei einem Produkteinschluss als auch bei unterschiedlich vielen Lagen an zu verschweissender Kunststofffolie zwischen zwei Backenkörpern ein Druckausgleich entlang des Heiss­ siegelbandes erfolgt. An der Stelle eines Produkteinschlusses oder einer höheren Anzahl an Folienlagen deformiert sich der Hohlkörper. Er wird dort derart eingedrückt, dass er sich der zu verschweissenden Kontur anpasst und an ihr einen relativ gleichmässigen Siegeldruck erzeugt. Das Heissssiegelband folgt dieser Deformierung und führt die entsprechende Verschweissung aus. Bei einer nachfolgenden Verschweissung ohne Produkteinschluss befindet sich der Hohlkörper in Folge seiner Rückstellfähigkeit wieder in seiner Ausgangsposition, so dass er eine Verschweissung unter normalen Bedingungen ausführt. Der Hohlkörper sorgt auch bei Seitenfaltenbeuteln für ein stets genaues Anpassen des Heissssiegelbandes an die genauen, momentanen, sich in einer Schwankungsbreite befindlichen Seitenfalten, sowie an die nicht ortskonstante Position der Folienschichten im Bereich der Längsnahtverschweissung bei einer vertikalen Schlauchbeutelmaschine.The device according to the invention has the advantage that both in one Product inclusion as well as in different layers to be welded Plastic film between two jaw bodies pressure equalization along the hot sealing tape takes place. In the place of product inclusion or higher The number of film layers deforms the hollow body. It is so indented there that it adapts to the contour to be welded and a relative to it uniform sealing pressure generated. The heat seal tape follows this deformation and carries out the appropriate welding. In a subsequent one Welding without product inclusion is the result of the hollow body Resilience back to its starting position, making it a weld runs under normal conditions. The hollow body also ensures Side gusseted bags for a precise adjustment of the heat seal tape to the exact, current gussets in a range of fluctuation, as well as the non-constant position of the film layers in the area of Longitudinal seam welding in a vertical tubular bag machine.

Ein weiterer Vorteil der Erfindung liegt darin, dass sowohl das Heissssiegelband als auch der Backenkörper vor einer Schädigung geschützt werden, wenn ein hartes eventuell relativ kleines Produkt zwischen zwei Backenkörpern eingeschlossen wird. Durch die relativ grosse Kraft beim Zusammenfahren der Backenkörper könnte ohne die erfindungsgemässe Neuerung eine Schädigung des relativ dünnen Heissssiegelbandes und ggf. des Backenkörpers vorkommen, was von da an zu undichten Schweissnähten führen kann. In Folge der Deformierung des Hohlkörpers und damit auch des Heissssiegelbandes werden derartige Schäden vermieden.Another advantage of the invention is that both the heat seal tape and also protect the cheek body from damage if a hard one possibly a relatively small product is enclosed between two jaw bodies. Due to the relatively large force when moving the jaw body could without the innovation according to the invention damage the relatively thin Heat seal tape and possibly the cheek body occur, which from then on leaky weld seams. As a result of the deformation of the hollow body and thus also the heat seal tape, such damage is avoided.

Weitere, vorteilhafte Ausgestaltungen der Erfindung sind in den Ansprüchen 2 bis 10 beschrieben. Further advantageous embodiments of the invention are in claims 2 to 10 described.  

Sind am Backenkörper zwei parallel zueinander ausgerichtete Siegelbereiche vorgesehen, und weist jeder Siegelbereich einen Hohlkörper und ein Heisssiegelband auf (Anspruch 2), so können gleichzeitig eine Kopfnaht eines Beutels und eine Bodennaht eines nachfolgenden Beutels erzeugt werden und bezüglich beider Nähte erfolgt ein Druckausgleich mittels eines Hohlkörpers.Are two sealing areas aligned parallel to each other on the jaw body provided, and each sealing area has a hollow body and a heat seal tape on (claim 2), so a top seam of a bag and a Bottom seam of a subsequent bag are generated and with respect to both seams pressure is equalized by means of a hollow body.

Als ein sich längs zum Heisssiegelband erstreckender Hohlkörper eignet sich ein Schlauch (Anspruch 3), insbesondere aus Kunststoff. Der Schlauch kann eine Füllung enthalten, die sein elastisches Verhalten bestimmt. Er kann aber auch ohne Füllung, allein durch seine Materialeigenschaften, seine Wandstärke und seinem Radius ein bestimmtes Deformations- und Rückstellverhalten aufweisen. Als Füllung eignet sich eine Flüssigkeit oder ein unter erhöhtem Druck befindliches Gas als strömfähiges Mittel (Anspruch 4), um schnell einen Druckausgleich herbeizuführen.A hollow body is suitable as a hollow body which extends longitudinally to the heat sealing tape Hose (claim 3), in particular made of plastic. The hose can be a filling included, which determines its elastic behavior. But it can also be filled without solely by its material properties, its wall thickness and its radius have certain deformation and resilience behavior. Suitable as a filling a liquid or a gas under increased pressure as a flowable medium (Claim 4) to quickly bring about a pressure equalization.

ist ein Vorratsbehälter für das Mittel vorgesehen, der über eine Hohlleitung mit dem Hohlkörper verbunden ist (Anspruch 5), so steht ein besonders grosses Volumen an Mittel für einen Druckausgleich zur Verfügung. Bei einem Gas hat dies den Vorteil, dass sich der vorgegebene Druck in Folge einer Deformation des Hohlkörpers kaum ändert. Bei einer Flüssigkeit kann am Vorratsbehälter ein Druckausgleich vorgesehen werden.a reservoir for the agent is provided, which via a hollow line with the Hollow body is connected (claim 5), so there is a particularly large volume Means for pressure equalization are available. With a gas, this has the advantage that the predetermined pressure hardly changes as a result of a deformation of the hollow body changes. In the case of a liquid, pressure equalization can be provided on the storage container become.

Eine Pumpe an einer zum Hohlkörper hin oder vom Hohlkörper weg führenden Hohlleitung, durch die das Mittel strömt (Anspruch 6) erlaubt durch Veränderung der Pumpleistung eine Veränderung des Druckes im Hohlkörper. Dadurch können die Deformations- und die Rückstelleigenschaft des Hohlkörpers auf ein spezielles Verpackungsvorhaben eingestellt werden. In analoger Weise ist dies auch mittels eines Ventils (Anspruch 7) möglich. Ist dieses als Servoventil ausgestaltet (Anspruch (8), so ist es elektrisch einstellbar. Das Ventil kann bei konstanter Pumpleistung zu einer Druckabsenkung genutzt werden. Eine Steuereinrichtung (Anspruch 9) kann zu einer Drucksteuerung genutzt werden, indem die Funktion der Pumpe oder des Servoventils gesteuert werden.A pump on one leading to the hollow body or away from the hollow body Hollow line through which the agent flows (claim 6) allowed by changing the Pump power is a change in pressure in the hollow body. This allows the Deformation and the resetting property of the hollow body on a special Packaging plans to be stopped. In an analogous way, this is also by means of a Valve (claim 7) possible. Is this designed as a servo valve (claim (8), so it is electrically adjustable. The valve can become a constant pump output Pressure reduction can be used. A control device (claim 9) can be a Pressure control can be used by the function of the pump or the servo valve to be controlled.

Ist für das Mittel ein Umlaufbetrieb vorgesehen (Anspruch 10), so können die Pumpe und das Servoventil in sinnvoller Funktionalität, hintereinander angeordnet, betrieben werden.If a circulation operation is provided for the agent (claim 10), the pump can and the servo valve in meaningful functionality, arranged one behind the other, operated become.

Im folgenden wird die Erfindung an Hand eines Ausführungsbeispiels näher beschrieben. Es zeigt:The invention will be explained in more detail below using an exemplary embodiment described. It shows:

Fig. 1 in einer perspektivischen Darstellung eine Vorrichtung zum Verschweissen von Kunststoff, mit einem Backenkörper, zwei Siegelbereichen am Backenkörper, jeweils einem Schlauch pro Siegelbereich und jeweils einem Heisssiegelband auf einem Schlauch; Figure 1 is a perspective view of a device for welding plastic, with a jaw body, two sealing areas on the jaw body, one tube per sealing area and one heat seal tape on a tube.

Fig. 2 in einem Vertikalschnitt eine Vorrichtung gemäss Fig. 1, zusammen mit einer weiteren Vorrichtung, in der ein ausfahrbares Stechmesser vorgesehen ist, an einem zu verschweissenden Folienschlauch, sowie Fig. 2 according to a vertical section of a device Fig. 1, together with a further device in which a retractable piercing knife is provided on a film tube to be welded, and

Fig. 3 in einer Draufsicht eine Vorrichtung gemäss Fig. 1, mit einem Vorrats­ behälter für ein Mittel zur Durchströmung der Hohlkörper, Hohlleitungen zwischen der Vorrichtung und dem Vorratsbehälter, einer Pumpe, einem Servoventil und einer Steuereinrichtung. Fig. 3 is a plan view of a device according to FIG. 1, with a storage container for a means for flowing through the hollow body, hollow lines between the device and the storage container, a pump, a servo valve and a control device.

Eine Vorrichtung 1 zum Verschweissen von thermoplastischem Kunststoff 2 weist einen Backenkörper 3 auf. An zwei parallel zueinander ausgerichteten Siegelbereichen 4 der Vorrichtung 1 ist jeweils ein Heisssiegelband 5 vorgesehen. Jedes Heisssiegelband 5 ist mittels elektrischen Stromes aufheizbar, um den Kunststoff 2 aufzuschmelzen und unter Druckausübung zu verschweissen. Jedes Heisssiegelband 5 ist über einen deformierbaren, rückstellbaren Hohlkörper 6 gespannt. Die Hohlkörper 6 befinden sich grösstenteils in Aussparungen des Backenkörpers 3 und sind dadurch ortsfest mit dem Backenkörper 3 verbunden. Als Hohlkörper 6 dienen Schläuche aus Kunststoff. Das Innere 7 der Hohlkörper 6 ist für ein Durchströmen von Druckluft vorgesehen.A device 1 for welding thermoplastic material 2 has a jaw body 3 . A heat seal tape 5 is provided on each of two sealing areas 4 of the device 1 aligned parallel to one another. Each heat seal tape 5 can be heated by means of an electric current in order to melt the plastic 2 and to weld it under the application of pressure. Each heat seal tape 5 is stretched over a deformable, resettable hollow body 6 . The hollow bodies 6 are for the most part in recesses in the jaw body 3 and are thereby fixedly connected to the jaw body 3 . Plastic tubes are used as the hollow body 6 . The interior 7 of the hollow body 6 is provided for compressed air to flow through.

Für die Druckluft ist ein Vorratsbehälter 8 vorgesehen, der über Hohlleitungen 9 mit dem Hohlkörper 6 verbunden ist. Während an einer Hohlleitung 9 eine Pumpe 10 vorgesehen ist, kann der Luftfluss an der anderen Hohlleitung 9 mittels eines Ventils 11 geregelt werden. Das Ventil 11 ist ein Servoventil, welches über eine Leitung 13 mit einer Steuereinrichtung 12 verbunden ist. Die Pumpe 10 ist ebenfalls über eine Leitung 14 mit der Steuereinrichtung 12 verbunden. Für die Druckluft ist ein Umlaufbetrieb vorgesehen. A reservoir 8 is provided for the compressed air and is connected to the hollow body 6 via hollow lines 9 . While a pump 10 is provided on a hollow line 9 , the air flow on the other hollow line 9 can be regulated by means of a valve 11 . The valve 11 is a servo valve which is connected to a control device 12 via a line 13 . The pump 10 is also connected to the control device 12 via a line 14 . Circulation mode is provided for the compressed air.

Befindet sich zwischen den Backenkörpern 3 im Folienschlauch ein Produkt, so deformieren sich an dieser Stelle die entsprechenden Hohlkörper 6 der Vorrichtungen 1, so dass die Heisssiegelbänder 5 und die Backenkörper 3 nicht beschädigt werden.If there is a product between the jaw bodies 3 in the film tube, the corresponding hollow bodies 6 of the devices 1 deform at this point, so that the heat sealing tapes 5 and the jaw bodies 3 are not damaged.

Durch die Steuereinrichtung 12 werden die Pumpe 10 und das Ventil 11 derart betrieben, dass der Druck im Innern 7 der Hohlkörper 6 konstant bleibt. Im Vorrats­ behälter 8 ist deshalb eine Druckmesseinrichtung vorgesehen, die ebenfalls mit der Steuereinrichtung 12 verbunden ist. 1 Vorrichtung
2 Kunststoff
3 Backenkörper
4 Siegelbereich
5 Heisssiegelband
6 Hohlkörper
7 Inneres
8 Vorratsbehälter
9 Hohlleitung
10 Pumpe
11 Ventil
12 Steuereinrichtung
13, 14 Leitung
The pump 10 and the valve 11 are operated by the control device 12 such that the pressure in the interior 7 of the hollow body 6 remains constant. In the storage container 8 , a pressure measuring device is therefore provided, which is also connected to the control device 12 . 1 device
2 plastic
3 jaw bodies
4 sealing area
5 heat seal tape
6 hollow bodies
7 interior
8 storage containers
9 hollow pipe
10 pump
11 valve
12 control device
13 , 14 line

Claims (10)

1. Vorrichtung zum Verschweissen von thermoplastischem Kunststoff, mit einem Backenkörper und einem Heisssiegelband an einem Siegelbereich des Backenkörpers, wobei das Heisssiegelband mittels elektrischen Stromes aufheizbar ist, um einen mit dem Heisssiegelband in Wärmekontakt befindlichen Kunststoff aufzuschmelzen und zu verschweissen, dadurch gekennzeichnet, dass das Heisssiegelband (5) an einem deformierbaren, rückstellbaren Hohlkörper (6) vorgesehen ist, und dass der Hohlkörper (6) mit dem Backenkörper (3) verbunden ist.1.Device for welding thermoplastic, with a jaw body and a heat seal tape on a sealing area of the jaw body, the heat seal tape being heatable by means of electric current in order to melt and weld a plastic that is in thermal contact with the heat seal tape, characterized in that the heat seal tape ( 5 ) is provided on a deformable, resettable hollow body ( 6 ), and that the hollow body ( 6 ) is connected to the jaw body ( 3 ). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass am Backenkörper (3) zwei parallel zueinander ausgerichtete Siegelbereiche (4) vorgesehen sind, und dass jeder Siegelbereich (4) einen Hohlkörper (6) und ein Heisssiegelband (5) aufweist.2. Device according to claim 1, characterized in that two mutually parallel sealing areas ( 4 ) are provided on the jaw body ( 3 ) and that each sealing area ( 4 ) has a hollow body ( 6 ) and a heat seal tape ( 5 ). 3. Vorrichtung nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass als Hohlkörper (6) ein Schlauch vorgesehen ist.3. Device according to claim 1 or claim 2, characterized in that a hose is provided as the hollow body ( 6 ). 4. Vorrichtung nach Anspruch 1, Anspruch 2 oder Anspruch 3, dadurch gekennzeich­ net, dass im Inneren (7) des Hohlkörpers (6) als strömfähiges Mittel eine Flüssigkeit oder ein unter höherem Druck befindliches Gas vorgesehen ist.4. Apparatus according to claim 1, claim 2 or claim 3, characterized in that in the interior ( 7 ) of the hollow body ( 6 ) is provided as a fluid as a fluid or a gas under higher pressure. 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass ein Vorratsbehälter (8) für das Mittel vorgesehen ist, und dass der Vorratsbehälter (8) über eine Hohlleitung (9) mit dem Hohlkörper (6) verbunden ist.5. The device according to claim 4, characterized in that a storage container ( 8 ) is provided for the agent, and that the storage container ( 8 ) via a hollow line ( 9 ) is connected to the hollow body ( 6 ). 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass an der Hohlleitung (9) eine Pumpe (10) vorgesehen ist.6. The device according to claim 5, characterized in that a pump ( 10 ) is provided on the hollow line ( 9 ). 7. Vorrichtung nach Anspruch 5 oder Anspruch 6, dadurch gekennzeichnet, dass an der Hohlleitung (9) ein Ventil (11) vorgesehen ist.7. The device according to claim 5 or claim 6, characterized in that a valve ( 11 ) is provided on the hollow line ( 9 ). 8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das Ventil (11) ein Servoventil ist.8. The device according to claim 7, characterized in that the valve ( 11 ) is a servo valve. 9. Vorrichtung nach Anspruch 6 oder Anspruch 8, dadurch gekennzeichnet, dass die Pumpe (10) bzw. das Servoventil mit einer Steuereinrichtung (12) verbunden ist. 9. The device according to claim 6 or claim 8, characterized in that the pump ( 10 ) or the servo valve is connected to a control device ( 12 ). 10. Vorrichtung nach mindestens einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass für das Mittel ein Umlaufbetrieb vorgesehen ist.10. The device according to at least one of claims 4 to 9, characterized characterized in that circulating operation is provided for the medium.
DE2000105020 2000-02-04 2000-02-04 Thermoplastics welding equipment for production of tubular bags from plastic film has a heat sealing band on a deformable support Withdrawn DE10005020A1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10234510A1 (en) * 2002-07-30 2004-02-19 Lemo Maschinenbau Gmbh Transverse welding or welding and cutting equipment for plastic films used in bag and sack production has a welding bar whose movement is produced by contraction of a hose length under internal pressure
EP1745915A1 (en) 2005-07-22 2007-01-24 Rovema Verpackungsmaschinen GmbH Device for welding thermoplastics
DE102005034286A1 (en) * 2005-07-22 2007-01-25 Rovema Verpackungsmaschinen Gmbh Device for welding thermoplastic synthetic materials, especially film strips, has sealing surface provided on insert which is exchangeable for similar type of insert with different sealing surface, or insert with special coating
DE102005034284A1 (en) * 2005-07-22 2007-01-25 Rovema Verpackungsmaschinen Gmbh Bonding device for thermoplastics, especially foil strips, has a sealing surface on a jaw unit and a heating device to heat up the sealing surface
WO2013030114A1 (en) * 2011-08-30 2013-03-07 Bielomatik Leuze Gmbh + Co. Kg Device for thermal impulse welding
US10513079B2 (en) 2016-10-20 2019-12-24 Baxter International Inc. Sealing die with chamfered edge

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10234510A1 (en) * 2002-07-30 2004-02-19 Lemo Maschinenbau Gmbh Transverse welding or welding and cutting equipment for plastic films used in bag and sack production has a welding bar whose movement is produced by contraction of a hose length under internal pressure
EP1745915A1 (en) 2005-07-22 2007-01-24 Rovema Verpackungsmaschinen GmbH Device for welding thermoplastics
DE102005034286A1 (en) * 2005-07-22 2007-01-25 Rovema Verpackungsmaschinen Gmbh Device for welding thermoplastic synthetic materials, especially film strips, has sealing surface provided on insert which is exchangeable for similar type of insert with different sealing surface, or insert with special coating
DE102005034284A1 (en) * 2005-07-22 2007-01-25 Rovema Verpackungsmaschinen Gmbh Bonding device for thermoplastics, especially foil strips, has a sealing surface on a jaw unit and a heating device to heat up the sealing surface
WO2013030114A1 (en) * 2011-08-30 2013-03-07 Bielomatik Leuze Gmbh + Co. Kg Device for thermal impulse welding
US10513079B2 (en) 2016-10-20 2019-12-24 Baxter International Inc. Sealing die with chamfered edge

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