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DE1296356B - Device for separating welding of continuously transported, overlapping plastic webs - Google Patents

Device for separating welding of continuously transported, overlapping plastic webs

Info

Publication number
DE1296356B
DE1296356B DE1963W0034076 DEW0034076A DE1296356B DE 1296356 B DE1296356 B DE 1296356B DE 1963W0034076 DE1963W0034076 DE 1963W0034076 DE W0034076 A DEW0034076 A DE W0034076A DE 1296356 B DE1296356 B DE 1296356B
Authority
DE
Germany
Prior art keywords
welding
roller
welding tool
rollers
separating
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
DE1963W0034076
Other languages
German (de)
Inventor
Rochla Kurt
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Priority to DE1963W0034076 priority Critical patent/DE1296356B/en
Publication of DE1296356B publication Critical patent/DE1296356B/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
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B29C66/83513—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums cooperating jaws mounted on rollers, cylinders or drums and moving in a closed path
    • 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
    • B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
    • 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
    • B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
    • B29C65/223—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire comprising several heated wires
    • 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
    • B29C65/743—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7433—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a wire
    • 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
    • B29C66/005—Detaching the article from the joining 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
    • 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
    • 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
    • B29C66/8145—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
    • B29C66/81457—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 comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/81811—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 of the welding jaws
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • 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
    • B29C66/851—Bag or container making machines
    • B29C66/8511—Bag making 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/003—Making articles of indefinite length
    • 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
    • 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
    • B29C66/81421—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 convex or concave
    • B29C66/81422—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 convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29L2031/7129—Bags, sacks, sachets open

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Making Paper Articles (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Trennschweißen von kontinuierlich transportierten, übereinanderliegenden Kunststoffbahnen mit einer rotierenden, aus elektrisch nichtleitendem Material bestehenden Walze als Schweißwerkzeug, an deren Mantelfläche ein Widerstands draht angebracht ist. The invention relates to a device for cut-off welding of continuously transported, superimposed plastic sheets with a rotating, from electrically non-conductive material existing roller as a welding tool, at their A resistance wire is attached to the outer surface.

Es ist bereits eine Trennschweißvorrichtung bekannt, bei der auf einer rotierenden, elektrisch nichtleitenden Walze Widerstandsdrähte unter Federspannung mit Abstand von der Walzenmantelfläche angeordnet sind. Bei der Erhitzung wird der gespannte Draht weich und verliert an Spannung, so daß mangels ausreichender mechanischer Festigkeit der Widerstandsdraht die Folien, insbesondere in seinem mittleren Bereich, nur unvollkommen zu durchdringen vermag, insbesondere Folien größerer Dicke. Die Folge sind nur teilweise zustande gekommene Trennschweißnähte, die eine Ausschlußbildung in der Beutelproduktion bedeuten. There is already a separation welding device known in which on a rotating, electrically non-conductive roller, resistance wires under spring tension are arranged at a distance from the roller jacket surface. When heated, the tensioned wire soft and loses tension, so that lack of sufficient mechanical Strength of the resistance wire the foils, especially in its middle area, able to penetrate only imperfectly, especially foils of greater thickness. the The result is only partially formed separating welds, which result in exclusion mean in bag production.

Es ist auch eine Schweißvorrichtung bekannt, mit der die zuerst mit einer Längsnaht versehene und damit zu einem Schlauch geschlossene Bahn in einzelne Schlauchabschnitte getrennt wird, wonach in einem gesonderten Arbeitsgang an jedem Ende des Schlauchabschnittes eine Querschweißnaht angebracht wird, was durch in Nuten einer Walze gelagerte Heizkörper geschieht. It is also known a welding device with which the first with a longitudinal seam provided and thus closed to form a tube into individual tracks Hose sections is separated, after which in a separate operation on each At the end of the hose section, a transverse weld is made, which is achieved by in Grooves of a roller-mounted radiator happens.

Der Erfindung liegt die Aufgabe zugrunde, ausgehend von einer Vorrichtung der eingangs beschriebenen Art eine Aufheizung der Drehachse, der Lager und der übrigen Maschine, die zu Betriebsstörungen durch Verklemmen führen kann und auch für das Personal gefährlich ist, weitgehend zu vermeiden und ein besonders gleichmäßiges und exaktes Trennschweißen zu erzielen. Zur Lösung dieser Aufgabe wird eine Vorrichtung der eingangs beschriebenen Art erfindungsgemäß derart ausgestaltet, daß der Widerstandsdraht in einer Nut angeordnet und sein Durchmesser größer als die Tiefe der Nut ist und daß die Walze aus wärmebeständigem Material besteht. Diese Ausgestaltung erweist sich als sehr vorteilhaft, da dadurch, daß der Heizdraht in eine Nut eines elektrisch nichtleitenden, wärmebeständigen Materials eingelegt ist und dort mit den Nutwandungen nur Linienberührung hat, die übertragene Berührungswärme sehr gering ist, wodurch die Gefahr von Störungen durch Aufheizung der übrigen Maschinenteile praktisch beseitigt ist. The invention is based on the object, proceeding from a device of the type described above, a heating of the axis of rotation, the bearings and the rest of the machine, which can and also lead to malfunctions due to jamming is dangerous for the staff, largely to be avoided and a particularly regular one and to achieve precise cut-off welding. A device is used to solve this problem of the type described above designed according to the invention in such a way that the resistance wire arranged in a groove and its diameter is greater than the depth of the groove and that the roller is made of heat-resistant material. This design proves proved to be very advantageous because the fact that the heating wire is in a groove of an electrical non-conductive, heat-resistant material is inserted and there with the groove walls only has line contact, the transferred contact heat is very low, whereby practically eliminates the risk of malfunctions due to heating of the other machine parts is.

Die erfindungsgemäße Vorrichtung ist auch insofern vorteilhaft als durch die Anordnung des Widerstandsdrahtes in einer Nut der Draht auf seiner gesamten Länge unterstützt ist und somit zur Durchführung des Trennschweißvorganges auf die Folien mit gleicher Festigkeit über seine gesamte Länge hin einwirkt. The device according to the invention is also advantageous in that by arranging the resistance wire in a groove of the wire on its entire Length is supported and thus to carry out the separation welding process on the Acts films with the same strength over its entire length.

In weiterer Ausgestaltung der Erfindung kann die Walze hohl ausgebildet und mit Vorrichtungen zur Zu- und Ableitung eines Kühlmediums versehen sein. In a further embodiment of the invention, the roller can be made hollow and be provided with devices for supplying and removing a cooling medium.

Außerdem kann das Schweißwerkzeug senkrecht zur Materialebene verstellbar sein, wodurch die Zeitdauer der Einwirkung des Schweißelements auf die Materiallagen verändert werden kann. In weiterer Ausgestaltung der Erfindung kann das Schweißwerkzeug über ein an sich bekanntes Getriebe mit einstellbarer Beschleunigung und Verzögerung der Drehbewegung während jedes Umlaufes antreibbar sein.In addition, the welding tool can be adjusted perpendicular to the plane of the material be, whereby the duration of the action of the welding element on the material layers can be changed. In a further embodiment of the invention, the welding tool via a known transmission with adjustable acceleration and deceleration the rotary movement be drivable during each revolution.

Bei Verwendung eines derartigen Getriebes ist einerseits die wesentliche Voraussetzung erfüllt, daß die Umfangsgeschwindigkeit des Schweißwerkzeuges während der Trennschweißung der Transportgeschwindigkeit der Materiallagen entspricht, wobei dennoch die Zeitspanne zwischen zwei Schweißvorgängen beliebig verstellt werden kann, so daß sich bei gleichbleibender Transportgeschwindigkeit unterschiedliche Abschnittlängen ergeben.When using such a transmission, on the one hand, the essential Condition met that the Peripheral speed of the welding tool during the separation weld corresponds to the transport speed of the material layers, where however, the time span between two welding processes can be adjusted as required can, so that when the transport speed remains the same, different Result in section lengths.

Es können auch zwei auf je einer Seite der Materialbahn angeordnete, gegenläufige und gleichzeitig wirksame Schweißwerkzeuge vorgesehen sein, und als Auflage für die Kunststoffbahnen kann eine drehbare Gegendruckwalze mit elastischer, wärmebeständiger Oberflächenschicht mit dem Schweißwerkzeug zusammenwirken. There can also be two arranged on one side of the material web, opposing and at the same time effective welding tools can be provided, and as A rotatable counter-pressure roller with elastic, heat-resistant surface layer interact with the welding tool.

Die Erfindung wird in der nachstehenden Beschreibung an Hand der Zeichnung näher erläutert, in welcher zwei Ausführungsbeispiele dargestellt sind. The invention is in the following description with reference to the Drawing explained in more detail, in which two embodiments are shown.

In der Zeichnung zeigen F i g. 1 und 2 das erste Ausführungsbeispiel in zwei Arbeitsstellungen und Fig. 3 und 4 das zweite Ausführungsbeispiel in entsprechenden Arbeitsstellungen.In the drawing, F i g. 1 and 2 the first embodiment in two working positions and FIGS. 3 and 4 the second embodiment in corresponding Working positions.

Wie die F i g. 1 zeigt, fördert ein kontinuierlich angetriebenes Vorzugwalzenpaar 1, 2 die zu bearbeitenden übereinanderliegenden Kunststoffbahnen 3, 4 in Richtung des Pfeiles 5 über eine Tischfläche 6 zu einem rotierenden Trennschweißwalzenpaar 7, 8. Die Trennschweißwalzen bestehen aus einem hitzebeständigen, elektrisch nichtleitenden Material, wie z. B. Asbestzement, und sind als Rohre ausgebildet, die von einem Kühlmittel 9 durchströmt werden. Entlang einer Mantellinie sind die Rohre mit je einer beispielsweise spitzwinkligen Nut 10 versehen, in die je ein elektrisch aufheizbarer Draht 11 eingelegt ist, dessen Durchmesser etwa doppelt so groß ist wie die Tiefe der Nut 10, so daß die Drähte 11 halb über den Umfang der Trennschweißwalzen 7 und 8 hervorragen, derart, daß die Kunststoffbahnen 3, 4, deren Dicke die Drahtdicke angepaßt ist, frei zwischen den Walzen hindurchgeführt werden können, wenn die Drähte 11 sich nicht in ihrer Arbeitsstellung befinden. As the F i g. 1 shows a continuously driven conveyor Preference roller pair 1, 2 the superimposed plastic webs to be processed 3, 4 in the direction of arrow 5 over a table surface 6 to a rotating pair of separating welding rollers 7, 8. The separation welding rollers consist of a heat-resistant, electrically non-conductive Material such as B. Asbestos cement, and are designed as pipes that of a Coolant 9 flows through. The tubes are along a surface line with each a, for example, acute-angled groove 10, in each of which an electrically heated Wire 11 is inserted, the diameter of which is about twice as large as the depth the groove 10, so that the wires 11 half over the circumference of the separating welding rollers 7 and 8 protrude in such a way that the plastic sheets 3, 4, the thickness of which is the wire thickness is adapted, can be passed freely between the rollers when the wires 11 are not in their working position.

Von den sich bei jedem Umlauf der Trennschweißwalzen 7, 8 einmal treffenden, miteinander in Berührung tretenden und weit über den Erweichungspunkt des Kunststoffs hinaus erhitzten Drähten 11 werden die Kunststoffbahnen 3, 4 zertrennt und an den beiderseits entstehenden Trennkanten (Fig.2) miteinander verschweißt.Of those that meet once with each revolution of the separating welding rollers 7, 8, coming into contact with each other and well above the softening point of the plastic In addition, heated wires 11, the plastic sheets 3, 4 are severed and attached to the Separating edges (Fig. 2) formed on both sides are welded together.

Die Trennschweißwalzen 7, 8 machen eine Umdrehung je Abschnittlänge und sind, beispielsweise über ein zu derartigen Zwecken bekanntes Doppelkurbelschleifengetriebe mit einstellbarer Exzentrizität oder über Ellipsenräder, so angetrieben, daß sie nur während des Trennschweißvorganges eine Umfangsgeschwindigkeit aufweisen, die derjenigen der Vorzugwalzen 1, 2 und damit der Transportgeschwindigkeit der Kunststoffbahnen 3, 4 entspricht, daß sie aber während ihres übrigen Umlaufes in dem Maße beschleunigt oder verzögert werden, daß zwischen zwei Trennschweißvorgängen die gewünschte Abschnittlänge mittels der Vorzugwalzen 1, 2 vorgeschoben wird. Nur wenn die Abschnittlänge dem Umfang der Trennschweißwalzen 7, 8 entsprechen soll, können dieselben ohne Beschleunigung oder Verzögerung während jedes Umlaufes mit einer Umfangsgeschwindigkeit rotieren, die der Transportgeschwindigkeit der Kunststoffbahnen 3, 4 gleich ist. The separating welding rollers 7, 8 make one revolution per section length and are, for example, via a double crank loop transmission known for such purposes with adjustable eccentricity or via elliptical gears, driven so that they have a circumferential speed only during the separation welding process that that of the feed rollers 1, 2 and thus the transport speed of the plastic webs 3, 4 corresponds, but that it accelerates to the same extent during its rest of the revolution or be delayed so that the desired section length between two cut-off welding operations is advanced by means of the feed rollers 1, 2. Only if the section length corresponds to Scope of the separating welding rollers 7, 8 should correspond to, the same can without acceleration or deceleration rotate at a peripheral speed during each revolution, which is the same as the transport speed of the plastic webs 3, 4.

In diesem Fall würde das Doppelkurbelschleifengetriebe seine Mittelstellung einnehmen, aus der es bei der Herstellung kürzerer Abschnittlängen nach der einen und bei der Herstellung längerer Abschnittlängen nach der anderen Seite hin verstellt wird.In this case the double crank loop gear would be used his Take center position from which it is used when making shorter section lengths one after the other and when producing longer section lengths after the other Side is adjusted.

Um die Dauer der Einwirkung der aufgeheizten Drähte 11 auf die Trennschweißstelle begrenzen zu können, sind die Trennschweißwalzen 7, 8, wie in Fig. 2 dargestellt, in Richtung der Doppelpfeile 14, 15 senkrecht zu den Werkstoffbahnen beispielsweise pneumatisch oder hydraulisch verstellbar. Der Antrieb der Trennschweißwalzen 7 und 8 erfolgt mit Rücksicht auf die An- und Abstellbewegung über Gelenkwellen. To the duration of the action of the heated wires 11 on the separation weld To be able to limit, the separation welding rollers 7, 8, as shown in Fig. 2, in the direction of the double arrows 14, 15 perpendicular to the material webs, for example pneumatically or hydraulically adjustable. The drive of the separation welding rollers 7 and 8 takes place with consideration of the on and off movement via cardan shafts.

Während des Trennschweißvorganges ist das vorauslaufende Stück der Werkstoffbahn bereits von einem zweiten Zugwalzenpaar 16, 17 erfaßt worden. During the separation welding process, the leading piece is the The web of material has already been gripped by a second pair of drawing rollers 16, 17.

Das Zugwalzenpaar 16, 17 wird über ein Friktionsgetriebe mit etwas höherer Umfangsgeschwindigkeit angetrieben als die Vorzugswalzen 1, 2. Entsprechend der Größe des einstellbaren übertragenen Drehmoments an dem Friktionsgetriebe üben das Zugwalzenpaar 16, 17 einen Zug auf die Werkstoffbahn aus, der eine einwandfreie Trennung der Werkstücke gewährleistet und das vorauslaufende Werkstück mit der größeren Geschwindigkeit abtransportiert. Zwischen den Trennschweißwalzen 7, 8 und dem Zugwalzenpaar 16, 17 ist eine zweite Tischfläche 18 angeordnet, über die das jeweils nächste Werkstück von der Trennschweißstelle zu dem Zugwalzenpaar 16, 17 vorgeschoben wird.The pair of pulling rollers 16, 17 is via a friction gear with something higher peripheral speed driven than the feed rollers 1, 2. Correspondingly Practice the size of the adjustable torque transmitted on the friction gear the pair of pulling rollers 16, 17 a pull on the material web, which is flawless Separation of the workpieces is guaranteed and the preceding workpiece with the larger one Speed transported away. Between the separating welding rollers 7, 8 and the pair of drawing rollers 16, 17 a second table surface 18 is arranged over which the next workpiece is advanced from the separating weld to the pair of pulling rollers 16, 17.

Führt man einer derartigen Trennschweißvorrichtung eine in Längsrichtung einmal gefaltete doppelt liegende Kunststoffbahn zu, so entsteht bei jedem Trennschweißvorgang ein fertiger, quer zur Transportrichtung liegender Kunststoffbeutel, dessen Seitennähte durch die Trennschweißnähte 12, 13 gebildet sind. In diesem Fall kann sich an das zweite Zugwalzenpaar 16, 18 unmittelbar eine Beutelablage, beispielsweise in Form eines geneigt angeordneten Tisches mit Fußleiste, anschließen. If such a separating welding device is carried out in the longitudinal direction Once folded, double-lying plastic web is created with every separation welding process a finished plastic bag lying at right angles to the direction of transport, its side seams are formed by the separating welds 12, 13. In this case, the second pair of pulling rollers 16, 18 directly a bag tray, for example in the form of an inclined table with a skirting board.

In F i g. 3 und 4 ist eine Trennschweißvorrichtung dargestellt, die sich von derjenigen nach Fig. 1 und 2 nur dadurch unterscheidet, daß nur ein einziger beheizter Draht 11 beispielsweise in der oberen Trennschweißwalze 7 angeordnet ist, der mit einer Gegenwalze 22 zusammenarbeitet, die aus einem Walzenkörper 23 besteht, der einen Mantel 24 aus nachgiebigem, hitzebeständigem Material, z. B. In Fig. 3 and 4, a separation welding device is shown which differs from that of FIGS. 1 and 2 only in that only one heated wire 11 is arranged, for example, in the upper separating welding roller 7, which cooperates with a counter roller 22, which consists of a roller body 23, the one jacket 24 made of resilient, heat-resistant material, for. B.

Silikongummi, trägt. Es genügt also unter Umständen auch, nur von einer Seite her mit einem geheizten Draht auf die Materiallagen zum Zwecke der Trennschweißung einzuwirken.Silicone rubber, wears. So it may also be sufficient, just from one side with a heated wire onto the material layers for the purpose of separating welding to act.

In diesem Fall ist nur die obere Trennschweiß- walze 7 in Richtung des Doppelpfeiles 25 (F i g. 4) an- und abrückbar. Die Gegenwalze 22 bleibt dagegen unverrückbar und begünstigt den Transport des mit der vorauslaufenden Trennschweißnaht 12 versehenen Endes des folgenden Werkstückes von der Tischfläche 6 zur Tischfläche 18. In this case, only the upper cut roll 7 towards of the double arrow 25 (FIG. 4) can be moved on and off. The counter roller 22 remains on the other hand immovable and favors the transport of the cutting weld seam in front 12 provided end of the following workpiece from the table surface 6 to the table surface 18th

Die Vorzugwalzen 1, 2 sind zweckmäßig über ein Differentialgetriebe angetrieben, um bei einer vorgedruckten Warenbahn die Vorzugstrecke zwischen zwei Trennschweißungen dem Druckabstand genau anpassen zu können. Das dritte Glied des Differentialgetriebes wird dabei über ein stufenlos regelbares Getriebe angetrieben, welches von Hand oder mittels Fotozellensteuerung in Abhängigkeit vom Druck selbsttätig geregelt wird. The feed rollers 1, 2 are expediently via a differential gear driven to the preferred route between two in a preprinted web To be able to adapt cut-off welds exactly to the printing distance. The third link of the Differential gear is driven by a continuously variable gear, which can be done manually or automatically by means of photocell control, depending on the pressure is regulated.

Claims (6)

Patentansprüche: 1. Vorrichtung zum Trennschweißen von kontinuierlich transportierten, übereinanderliegenden Kunststoffbahnen mit einer rotierenden, aus elektrisch nichtleitendem Material bestehenden Walze als Schweißwerkzeug, an deren Mantelfläche ein Widerstandsdraht angebracht ist, d a d u r c h g e k e n n z e i c h n e t, daß der Widerstandsdraht (11) in einer Nut angeordnet und sein Durchmesser größer als die Tiefe der Nut ist und daß die Walze (7) aus wärmebeständigem Material besteht. Claims: 1. Device for cut-off welding of continuously transported, superimposed plastic sheets with a rotating, from electrically non-conductive material existing roller as a welding tool, at their A resistance wire is attached to the outer surface, d u r c h e n n z e i c h n e t that the resistance wire (11) is arranged in a groove and its diameter is greater than the depth of the groove and that the roller (7) is made of heat-resistant material consists. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Walze (7) hohl ausgebildet und mit Vorrichtungen zur Zu- und Ableitung eines Kühlmediums (9) versehen ist. 2. Apparatus according to claim 1, characterized in that the roller (7) designed to be hollow and with devices for supplying and removing a cooling medium (9) is provided. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Schweißwerkzeug (7) senkrecht zur Materialebene verstellbar ist. 3. Apparatus according to claim 1 or 2, characterized in that the welding tool (7) can be adjusted perpendicular to the plane of the material. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Schweißwerkzeug (7) über ein an sich bekanntes Getriebe mit einstellbarer Beschleunigung und Verzögerung der Drehbewegung während jedes Umlaufes antreibbar ist. 4. Device according to one of claims 1 to 3, characterized in that that the welding tool (7) via a known transmission with adjustable Acceleration and deceleration of the rotary movement can be driven during each revolution is. 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zwei auf je einer Seite der Materialbahnen (3, 4) angeordnete gegenläufige und gleichzeitig wirksame Schweißwerkzeuge (7, 8) vorgesehen sind. 5. Device according to one of claims 1 to 4, characterized in that that two on each side of the material webs (3, 4) arranged in opposite directions and simultaneously effective welding tools (7, 8) are provided. 6. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Auflage für die Kunststoffbahnen (3, 4) eine drehbare Gegendruckwalze (22) mit elastischer, wärmebeständiger Oberflächenschicht (24) mit dem Schweißwerkzeug (7) zusammenwirkt. 6. Device according to one of claims 1 to 4, characterized in that that as a support for the plastic webs (3, 4) a rotatable counter-pressure roller (22) with elastic, heat-resistant surface layer (24) with the welding tool (7) cooperates.
DE1963W0034076 1963-03-12 1963-03-12 Device for separating welding of continuously transported, overlapping plastic webs Pending DE1296356B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185647A (en) * 1937-08-28 1940-01-02 Edwin J Mcilvried Method and means for cutting and joining sheet material
CH274038A (en) * 1949-01-31 1951-03-15 Langer Nicholas Process for welding thermoplastic layers and machine for carrying out this process.
DE1673783U (en) * 1951-04-11 1954-03-18 Lorenz C Ag DEVICE FOR SEAM WELDING OF THERMOPLASTIC FILMS.
DE1007163B (en) * 1953-10-05 1957-04-25 Milprint Inc Device for the production of sacks or bags from heat-expandable film material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185647A (en) * 1937-08-28 1940-01-02 Edwin J Mcilvried Method and means for cutting and joining sheet material
CH274038A (en) * 1949-01-31 1951-03-15 Langer Nicholas Process for welding thermoplastic layers and machine for carrying out this process.
DE1673783U (en) * 1951-04-11 1954-03-18 Lorenz C Ag DEVICE FOR SEAM WELDING OF THERMOPLASTIC FILMS.
DE1007163B (en) * 1953-10-05 1957-04-25 Milprint Inc Device for the production of sacks or bags from heat-expandable film material

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