DE2310596B2 - METHOD AND DEVICE FOR MANUFACTURING BAGS FROM THERMOPLASTIC PLASTIC - Google Patents

METHOD AND DEVICE FOR MANUFACTURING BAGS FROM THERMOPLASTIC PLASTIC

Info

Publication number
DE2310596B2
DE2310596B2 DE19732310596 DE2310596A DE2310596B2 DE 2310596 B2 DE2310596 B2 DE 2310596B2 DE 19732310596 DE19732310596 DE 19732310596 DE 2310596 A DE2310596 A DE 2310596A DE 2310596 B2 DE2310596 B2 DE 2310596B2
Authority
DE
Germany
Prior art keywords
film
welding
roller
tubular film
rollers
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.)
Granted
Application number
DE19732310596
Other languages
German (de)
Other versions
DE2310596A1 (en
DE2310596C3 (en
Inventor
Arnoldus Willem Jan Dedemsvaart Leloux (Niederlande)
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.)
Wavin BV
Original Assignee
Wavin BV
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 Wavin BV filed Critical Wavin BV
Publication of DE2310596A1 publication Critical patent/DE2310596A1/en
Publication of DE2310596B2 publication Critical patent/DE2310596B2/en
Application granted granted Critical
Publication of DE2310596C3 publication Critical patent/DE2310596C3/en
Expired 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7888—Means for handling of moving sheets or webs
    • B29C65/7894—Means for handling of moving sheets or webs of continuously moving sheets or webs
    • 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
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B29C66/0322—Post-pressing without reshaping, i.e. keeping the joint under pressure after joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/343—Making tension-free or wrinkle-free joints
    • B29C66/3432—Making tension-free or wrinkle-free joints by holding the material loose or tension-free during joining
    • 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
    • B29C66/70—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
    • 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
    • B29C66/8124—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 structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81241—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 structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps being porous or sintered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • 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
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • 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
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93441—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93451—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0045—Perforating
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
    • 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
    • B29C2795/00—Printing on articles made from plastics or substances in a plastic state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—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
    • B29C66/818—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
    • 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
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/10—Feeding or positioning webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/92—Delivering
    • B31B70/94—Delivering singly or in succession
    • B31B70/946—Delivering singly or in succession the bags being interconnected

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Making Paper Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zum Herstellen von Beuteln aus thermoplastischem Kunststoff, bei welchem auf eine kontinuierlich fortbewegte und flachgelegte Schlauchfolie durch ein mit der Schlauchfolie bewegtes Schweißwerkzeug Querschweißnähte hergestellt werden, wobei mindestens während des Schweißens die Schlauchfolie spannungslos geführt wird und bei dem danach die Schweißnaht gekühlt wird und an der Schlauchfolie gegebenenfalls Perforationen angebracht werden.The invention relates to a method for producing bags made of thermoplastic material, in which on a continuously moved and flattened tubular film through a with the Tubular film moving welding tool Cross welds are produced, with at least During the welding, the tubular film is guided without tension and afterwards the weld seam is cooled and perforations may be made on the tubular film.

Es ist bekannt, zum Herstellen einer besonders haltbaren Schweißnaht an Schlauchfolien den Nahtbereich drucklos zu schmelzen und nachträglich diesen Bereich unter Druck zu kühlen (DT-PS 8 72 400). Wenn man nach diesen Vorschlägen arbeitet, so ist man nicht imstande eine Reihe hintereinander und miteinander zusammenhängender Kur.ststoffbeutel herzustellen, weil die Bedingungen bei dem Verfahren dazu zw.ngen. zuerst ein Schlauchfolienende zu schneiden, ehe weiter- *β&ί firner" bekannt (US-PS 36 22 421), die Bahn der Schlauchfolie nach dem Verschweißen spannungsfrei zu halten und zwar so lange, bis die Schweißverbin-It is known, to produce a particularly durable weld seam on tubular films, to melt the seam area without pressure and to subsequently cool this area under pressure (DT-PS 8 72 400). If you work according to these suggestions you will not be able to make a series of consecutive and interrelated plastic bags because the conditions of the process dictate it. first to cut a tubular film end, before further- * β & ί firner "known (US-PS 36 22 421) to keep the web of tubular film free of tension after welding and until the welded connection

dung, mindestens teilweise, gekühlt ist, um eine Schwächung der Schweißverbindungen durch eine Streckung des Materials zu vermeiden. Zu diesem Zweck wird eine bestimmte Länge der Schlauchfolienbahn mit Hilfe von Vakuum-Ansaugöffnungen auf einer Rolle gehal-dung, at least partially, is cooled to a weakening of the welded joints by stretching the material. To this end, will a certain length of the tubular film web held on a roll with the help of vacuum suction openings

1S ten und ist zum Spannen des Folienteils ein bewegliches Organ vorhanden, das während der Wärmezufuhr die Folie entspannen läßt; aber kurz nach der Verschweißung wird dieses Organ wieder nach außen bewegt, wodurch also die Folienbahn nahezu wieder die 1S th and there is a movable member for tensioning the film part, which allows the film to relax during the supply of heat; but shortly after the welding, this organ is moved outwards again, so that the film web almost again

ursprüngliche Länge annimmt. Es hat sich aber in der Praxis gezeigt, daß man nach diesem Vorschlag nicht arbeiten kann, weil es nicht gelingt, den Folienteil stets spannungslos zu halten. Die zur Herstellung von Beuteln verwendeten Kunststoffe haben nämlich den Man-takes on its original length. However, it has been shown in practice that this proposal does not can work because it is not possible to keep the foil part tension-free at all times. The one used to make bags The plastics used have the man-

gel daß die Schrumpfwerte niemals konstant sind und sopar zwischen 1% und 4% variieren. Es wird daher jener Teil der Folienbahn, der zwischen den beiden Vakuum-Ansaugöffnungen nach der Verschweißung, nämlich dann, wenn sich dieses Organ nach außen bewegengel that the shrinkage values are never constant and thus vary between 1% and 4%. It will therefore that part of the film web that is between the two vacuum suction openings after welding, namely then when this organ moves outwards

wird wieder gespannt werden. Dazu kommt aber schließlich noch, daß während der Wärmezufuhr die Folie zwischen Heizstäbe eingeklemmt wird, so daß die Schweißverbindung zu dünn wird bzw. die Schweißverbindung dadurch praktisch geschwächt wird.will be tensioned again. Finally, there is also the fact that during the supply of heat the Foil is clamped between heating rods, so that the welded connection is too thin or the welded connection thereby practically weakened.

Demgegenüber hat sich die Erfindung die Aufgabe gestellt, eine verbesserte Schweißnaht herzustellen und Bahnen von zusammenhängenden Kunststoffbeuteln zu schaffen, bei denen diese Beutel nicht nur gute Schweißverbindungen, sondern auch keinerlei örtliche Wandungsschwächen aufweisen.In contrast, the invention has set itself the task of producing an improved weld seam and To create webs of interconnected plastic bags, in which these bags are not all good Welded connections, but also have no local wall weaknesses.

Diese Aufgabe wird nach dem Vorschlag der Erfindung dadurch gelöst, daß das Schweißwerkzeug drucklos an einer Seite der flachgelegten Folie angelegt und, nachdem das Schweißwerkr.eug entfernt wurde, die Schweißnaht unter Druck gekühlt wird.According to the proposal of the invention, this object is achieved in that the welding tool is depressurized applied to one side of the foil laid flat and, after the welding tool has been removed, the Weld seam is cooled under pressure.

Bei der Anwendung eines derartigen Schweißverfahrens hat es sich herausgestellt, daß die Schweißverbindung eine wesentlich bessere Qualität aufweist als nach den bekannten Verfahren. Dies hängt offenbar mit der Tatsache zusammen, daß an der Stelle der Schweißverbindung das Kunststoffmaterial zuerst ohne Anwendung von Druck plastifiziert wird, worauf das Ganze unter Verwendung einer Kühlwalze einem Druck ausgesetzt wird, wobei die Kühlwalze die Wärme raschWhen using such a welding process, it has been found that the welded connection has a significantly better quality than according to the known methods. This apparently has to do with the The fact that at the point of the welded joint the plastic material first without application plasticized by pressure, whereupon the whole is subjected to pressure using a chill roll the chill roll the heat rapidly

abführt und andererseits die erforderliche Zusammenpressung zwischen den aufeinanderliegenden Folienschichten erfolgt.dissipates and on the other hand the necessary compression between the layers of film lying on top of one another he follows.

Die Oberfläche von mindestens einer der unter Druck zusammenarbeitenden Walzen wird durch ein Kühlmittel gekühlt. Dies kann z. B. dadurch erfolgen, daß Umgebungsluft auf die Walzen geblasen wird, von denen mindestens eine aus Metall besteht. Die das Schweißglied berührende Folienoberfläche berührt die Metalloberfläche ohne Verwendung einer Isolationsschicht. The surface of at least one of the co-operating rollers under pressure is through a Coolant cooled. This can e.g. B. be done in that ambient air is blown onto the rollers of at least one of which is made of metal. The foil surface touching the welding member touches the Metal surface without the use of an insulating layer.

Während des Einwirkens des beheizten Schweißgliedes kann die Schlauchfolie mittels mindestens einer in einem der Gesamtschichtdicke der aufeinanderliegen-During the action of the heated welding member, the tubular film can by means of at least one in one of the total layer thickness of the

den Folienschichten entsprechenden Abstand von der Schweißwalze liegenden Walze geführt werden.the film layers corresponding to the distance from the sealing roller lying roller are guided.

Auf diese Weise ist ein guter Kontakt zwischen den beiden Folienschichten gewährleistet, die später, wenn sie an den Druckwalzen vorbeigeführt werden, in einwandfreier Weise miteinander verbunden werden.In this way, a good contact between the two layers of film is guaranteed, which later when they are guided past the pressure rollers and are connected to one another in a satisfactory manner.

Die Oberflächengeschwindigkeit der Druckwalzen ist kleiner als die Geschwindigkeit dei Schlauchfolie während der Schweißung.The surface speed of the pressure rollers is lower than the speed of the tubular film during welding.

Nachdem eine Schweißverbindung zwischen den Kühlwalzen durchgeführt wurde, jedoch ehe ein Schweißglied von neuem auf das Folienmaterial einwirkt, wird dasselbe mittels einer Zugbearbeitung schlüpfend zwischen den Druckwalzen hindurchgezogen, damit die Fördergeschwindigkeitsdifferenzen der Folienbahn ausgeglichen werden.After a weld joint has been made between the chill rolls, but before a Welding member acts again on the foil material, the same is done by means of a tensile processing slipping between the pressure rollers, so that the conveyor speed differences of the Foil web are compensated.

Die Erfindung bezieht sich ferner auf eine Vorrichtung zum kontunierlichen Herstellen von Beuteln aus thermoplastischem Kunststoff, bei der sich an gleichförmig angetriebenen Vorzugswalzen zum Abziehen einer Schlauchfolie aus einem Speicher eine Schweißtrommel mit bündig in ihrer Oberfläche liegenden Schweißgliedern anschließt, die entsprechend der Vorzugsgeschwindigkeit aus dem Folienspeicher angetrieben ist und die vom Folienschlauch umschlungen ist, bei der der Folienschlauch durch eine Abzugseinrichtung von der Schweißtrommel abgezogen wird und die gegebenenfalls eine Querperforierungseinrichtung für den Folienschlauch aufweist, besteht dalei darin, daß zwischen der Abzugseinrichtung und der Schweißtrommel nacheinander ein mit einer geringeren Oberflächengeschwindigkeit als die der Schweißtrommel angetriebenes Druckwalzenpaar und eine Rolle, die auf den Folienschlauch eine Zugkraft ausübt, angeordnet sind und daß eine der Druckwalzen gekühlt ist.The invention also relates to a device for the continuous production of bags from thermoplastic material, which is attached to uniformly driven feed rollers for pulling off a tubular film from a memory a welding drum with lying flush in its surface Welding links are connected, which are driven from the film store according to the preferred speed and which is wrapped by the film tube, in which the film tube is pulled through a pull-off device is withdrawn from the welding drum and optionally a transverse perforation device for Has the film tube, there is that between the take-off device and the welding drum one after the other driven at a lower surface speed than that of the welding drum Pressure roller pair and a roller, which exerts a tensile force on the film tube, are arranged and that one of the pressure rollers is cooled.

Es ist vorteilhaft, eine oder mehrere Kontaktwalzen vorzusehen, die der drehbaren Walze gegenüber angebracht sind, wobei das Spiel zwischen der drehbaren Walze und der Kontaktwalze im wesentlichen der Gesamtstärke der aufeinanderliegenden Folienschichten der Schlauchfolie gleich ist.It is advantageous to provide one or more contact rollers which are mounted opposite the rotatable roller are, the clearance between the rotatable roller and the contact roller being substantially the total thickness of the superimposed film layers of the tubular film is the same.

Durch die Anwendung eines hinsichtlich der drehbaren Walze wärmeisoliert angeordneten Schweißgliedes wird gewährleistet, daß die aus wärmeleitendem Material bestehende Walzenoberfläche nicht eine Temperaturerhöhung erleidet oder wenigstens mit ihrer Temperatur unter der Plastifizierungstemperatur des Kunststoffes bleibt. Diese Temperatur beträgt bei Polyäthylen z. B. weniger als 6O0C. Dabei ist es vorteilhaft, eine der Druckwalzen mit einer Meta'Oberfläche großen Durchmessers zum Abführen der Wärme zu versehen. Dadurch wird wird nämlich erreicht, daß die Temperatur dieser Kühlwalze kaum die Zimmertemperatur oder die Temperatur der Umgebung überschreitet.By using a heat-insulated welding member with respect to the rotatable roller, it is ensured that the roller surface, which is made of thermally conductive material, does not suffer a temperature increase or at least its temperature remains below the plasticizing temperature of the plastic. This temperature is for polyethylene z. B. less than 6O 0 C. It is advantageous to provide one of the pressure rolls with a large diameter Meta'Oberfläche for dissipating the heat. This is because it is achieved that the temperature of this cooling roller hardly exceeds the room temperature or the temperature of the environment.

Eine weitere erfindungsgemäße Bauform sieht vor, daß eine der Druckrollen von der anderen mit ihr zusammenarbeitenden Druckrolle abhebbar ist. Wenn man eine oder mehrere Abstandswalzen vorsieht, die der die Schweißglieder aufweisenden Walze gegenüberliegen, so kann man dabei erreichen, daß das Spiel zwischen der drehbaren Walze und den Kontaktwalzen im wesentlichen der Gesamtstärke der aufeinanderliegenden Folienschichten der Schlauchfolienbahn entspricht. Diese Kontaktwalzen oder Bürstenwalzen bestehen dabei vorteilhaft aus Schaumgummi.A further design according to the invention provides that one of the pressure rollers cooperate with it from the other Pressure roller is liftable. If one or more spacer rollers are provided that opposite the roller having the welding members, so you can achieve that the game between the rotatable roller and the contact rollers essentially the total thickness of the superposed Foil layers corresponds to the tubular film web. These contact rollers or brush rollers exist advantageously made of foam rubber.

Die Erfindung wird in der nachfolgenden Beschreibung an Hand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention is illustrated in the following description with reference to one in the drawing Embodiment explained in more detail.

Die Vorrichtung ist mit einer drehbar gelagerten Haspel 1 versehen, auf der eine Kunststoffolie 3 aufgewickelt ist Diese Haspel 1 stützt sich auf drehbare Gummiwalzen 2 ab, die mit einer der gewünschten Zuführgeschwindigkeit der Folienbahn entsprechenden Umfangsgeschwindigkeit angetrieben werden können. Nach den Führungswalzen 4 ist eine Perforationsvorrichtung 5 vorgesehen, die auf der Schlauchfolie 3 eine Querperforation anbringt, an der die einzelnen Beutel später voneinander getrennt werden können. Diese Perforationsvorrichtung 5 besteht aus einer drehbaren Walze mit Vorsprüngen, die mit einer gegenüberliegenden Anpreßwalze 6 zusammenarbeitet.The device is provided with a rotatably mounted reel 1 on which a plastic film 3 is wound This reel 1 is supported on rotatable rubber rollers 2, which are fed with one of the desired feed speeds the peripheral speed corresponding to the film web can be driven. After the guide rollers 4 is a perforation device 5 provided, which makes a transverse perforation on the tubular film 3, on which the individual bags can later be separated from each other. This perforation device 5 consists of a rotatable Roll with projections which cooperates with a pressure roll 6 opposite.

Die Vorrichtung erlaubt also, wie ohne weiteres erkennbar ist, eine sehr rasche Herstellung der Beutel, denn nach dem Perforieren wird die Schlauchfolienbahn 3 über eine drehbare Trommel 8 geführt, in deren Metalloberfläche zwei Schweißstäbe 10 eingesetzt sind.As is readily apparent, the device allows the bags to be manufactured very quickly, because after the perforation, the tubular film web 3 is guided over a rotatable drum 8, in which Metal surface two welding rods 10 are used.

Damit verhindert wird, daß während der Einwirkung des Schweißstabes 10 sich die obere Folienschicht gegenüber der unteren verschiebt, sind die Kontaktwalzen oder Bürsten 7, 9 und 11 vorgesehen. Der kleinste Abstand zwischen der Oberfläche der Walze 8 und den Walzen 7,9 und 11 ist der Gesamtstärke der aufeinanderliegenden Schichten der Schlauchfolie gleich. Die Kontaktwalzen 7, 9, 11 haben jedoch keine Druckwirkung. Der Schweißstab 10 kann auch mittels Asbestisolierung isoliert in der Oberfläche der Walze 8 angeordnet sein.Is thus prevented that the upper film layer moves relative to the lower during the application of the welding rod 10, the contact rollers or brushes 7, 9 and 11 are provided. The smallest distance between the surface of the roller 8 and the rollers 7, 9 and 11 is equal to the total thickness of the layers of the tubular film lying on top of one another. The contact rollers 7, 9, 11, however, have no pressure effect. The welding rod 10 can also be arranged in the surface of the roller 8 in an insulated manner by means of asbestos insulation.

Die Oberfläche der Anpreßwalze 13 besteht vorzugsweise aus Gummi, wobei man jedoch auch andere Materialien, wie beispielsweise Metall oder eine mit PTFE umkleidete Metalloberfläche wählen kann. In bestimmten Fällen wird jedoch die erste Lösung bevorzugt Zum Andrücken der Walze 13 gegen die Kühlwalze 12 ist ein Hebel 19 vorgesehen.The surface of the pressure roller 13 is preferably made of rubber, although others can also be used Materials such as metal or a metal surface coated with PTFE can choose. In particular In cases, however, the first solution is preferred for pressing the roller 13 against the cooling roller 12 a lever 19 is provided.

Jeder Schweißstab 10 besteht aus mit PTFE umkleidetem Kupfer und kann mit Hilfe von Heizgliedern auf eine Temperatur von 200 bis 400° C entsprechend der jeweiligen Dicke der Folie, der Antriebsgeschwindigkeit und dem Folienmaterial erhitzt werden. Die an die Schweißstäbe 10 angrenzende Oberfläche der Walze 8 soll dabei erheblich unter der Plastifizierungstemperatur der Kunststoffolie bleiben, beispielsweise unter 60°C bei Polyäthylen und vorzugsweise nicht über 30°CEach welding rod 10 consists of copper coated with PTFE and can be opened with the aid of heating elements a temperature of 200 to 400 ° C according to the respective thickness of the film, the drive speed and heating the sheet material. The surface of the roller 8 adjoining the welding rods 10 should remain well below the plasticizing temperature of the plastic film, for example below 60 ° C for polyethylene and preferably not above 30 ° C

Da die Führungswalzen 4 die Schlauchfolienbahn 3 etwas schnelSer fördern als die Walze 13 mit der Kühlwalze 12, berührt die Schlauchfolienbahn spannungslos den Schweißstab 10.Since the guide rollers 4 convey the tubular film web 3 somewhat faster than the roller 13 with the cooling roller 12, the tubular film web is in contact with the welding rod 10 without tension.

Nach der Plastifizierung wird die Schlauchfolienbahn 3 zwischen einer nachgeordneten Kombination von Kühlwalze 12 mit Andrückwalze 13 hindurchgeführt. Die Kühlwalze 12 ist mit einer inneren Kühlspirale 18 versehen, wodurch die Metalloberfläche der Kühlwalze 12 auf Zimmertemperatur oder niedriger gehalten werden kann.After the plasticization, the tubular film web 3 is between a downstream combination of Cooling roller 12 with pressure roller 13 passed through. The cooling roller 12 is provided with an inner cooling spiral 18 provided, whereby the metal surface of the cooling roller 12 can be kept at room temperature or lower can.

Es hat sich dabei herausgestellt, daß die Qualität der Schweißverbindung durch das Zusammendrücken nach vorhergehender Plastifizierung beträchtlich verbessert wird. Vermutlich ist das darauf zurückzuführen, daß die untere Schicht der Schlauchfolienbahn über ihre ganze Stärke plastifiziert wird und in der daraufliegenden Schicht der Schlauchfolienbahn nur ein Teil der Stärke der Schicht plastifiziert wird, so daß im wesentlichen eine Verklebung stattfindet zwischen der unteren Schicht einer plastifizierten obenliegenden Oberfläche und der darunterliegenden Oberfläche der ganz plastifi-It has been found that the quality of the welded joint is reduced by the compression previous plasticization is considerably improved. Presumably this is due to the fact that the The lower layer of the tubular film web is plasticized over its entire thickness and in the one lying on top Layer of the tubular film web only part of the thickness of the layer is plasticized, so that essentially bonding takes place between the lower layer of a plasticized overhead surface and the underlying surface of the completely plastic

zierten unteren Schicht.adorned lower layer.

Nachdem die Schlauchfolienbahn 3 den Schweißstab 10 verlassen hat, und ehe der Schweißstab 10 wieder von neuem die Schlauchfolienbahn 3 berührt, wird diese mit Hilfe der mit einer Feder 21 zusammenarbeitenden Spannrolle 20 schlüpfend zwischen den Walzen 12, 13 hindurchgezogen. In dieser Weise wird eine zu große Schleifenbildung zwischen der Walze 8 und den Walzen 12,13 vermieden.After the tubular film web 3 has left the welding rod 10, and before the welding rod 10 again again touches the tubular film web 3, this is with the help of the cooperating with a spring 21 Tensioning roller 20 is pulled through between the rollers 12, 13, slipping. In this way one becomes too big The formation of loops between the roller 8 and the rollers 12, 13 is avoided.

Nach der Kühlwalze 12 und der Anpreßwalze 13 sind zwei zusammenarbeitende drehbare Walzen 14 und 15 angeordnet, die die Schlauchfolie 3 mit der gleichen Geschwindigkeit wie die Zuführwalze 4 fortbewegen.After the cooling roller 12 and the pressure roller 13 are two rotatable rollers 14 and 15 which work together arranged, which move the tubular film 3 at the same speed as the feed roller 4.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (4)

Patentansprüche:Patent claims: 1. Verfahren zum Herstellen von Beuteln aus thermoplastischem Kunststoff, bei welchem auf eine kontinuierlich fortbewegte und flachgelegte Schlauchfolie durch ein mit der Schlauchfolie bewegtes Schweißwerkzeug Querschweißnähte hergestellt werden, wobei mindestens während des Schweißens die Schlauchfolie spannungslos geführt wird und bei dem danach die Schweißnaht gekühlt wird und an der Schlauchfolie gegebenenfalls Perforationen angebracht werden, dadurch gekennzeichnet, daß das Schweißwerkzeug drucklos an einer Seite der nachgelegten Folie angelegt und, nachdem das Schweißwerkzeug entfernt wurde, die Schweißnaht unter Druck gekühlt wird.1. A method for producing bags made of thermoplastic material, in which on a continuously moved and flattened tubular film by a moved with the tubular film Welding tool cross welds are made, at least during the Welding the tubular film is guided without tension and afterwards the weld seam is cooled and perforations may be attached to the tubular film, characterized in that that the welding tool is applied without pressure on one side of the added film and, after the welding tool is removed, the weld is cooled under pressure. 2. Vorrichtung zum kontinuierlichen Herstellen von Beuteln aus thermoplastischem Kunststoff, bei der sich an gleichförmig angetriebenen Vorzugswalzen zum Abziehen einer Schlauchfolie aus einem Speicher eine Schweißtrommel mit bündig in ihrer Oberfläche liegenden Schweißgliedern anschließt, die entsprechend der Vorzugsgeschwindigkeit aus dem Folienspeicher angetrieben ist und die vom Folienschlauch umschlungen ist, bei der der Folienschlauch durch eine Abzugseinrichtung von der Schweißtrommel abgezogen wird und die gegebenenfalls eine Querperforierungseinrichtung für den Folienschlauch aufweist, zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß zwischen der Abzugseinrichtung (14, 15) und der Schweißtrommel (8) nacheinander ein mit einer geringeren Oberflächengeschwindigkeit als die der Schweißtrommel (8) angetriebenes Druckwalzenpaar (13,18) und eine Rolle (20), die auf den Folienschlauch eine Zugkraft ausübt, angeordnet sind und daß eine der Druckwalzen (13, IB) gekühlt ist.2. Device for the continuous production of bags made of thermoplastic material, in which a welding drum with welding members lying flush in its surface is connected to uniformly driven feed rollers for pulling off a tubular film from a storage device, which is driven from the film storage device according to the preferred speed and which is driven by the film tube is wrapped, in which the film tube is pulled off the welding drum by a pull-off device and which optionally has a transverse perforation device for the film hose, for carrying out the method according to claim 1, characterized in that between the pull-off device (14, 15) and the welding drum (8 ) a pair of pressure rollers (13, 18) driven at a lower surface speed than that of the welding drum (8) and a roller (20), which exerts a tensile force on the film tube, are arranged one after the other, and that one of the pressure rollers (13, IB) is cooled. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß eine oder mehrere Kontaktwalzen (7, 9,11) vorgesehen sind, die der drehbaren Walze (8) gegenüber angebracht sind, wobei das Spiel zwischen der drehbaren Walze (8) und der Kontaktwalze (7, 9, 11) im wesentlichen der Gesamtstärke der aufeinanderliegenden Folienschichten der Schlauchfolie (3) gleich ist.3. Device according to claim 2, characterized in that that one or more contact rollers (7, 9, 11) are provided which the rotatable roller (8) are mounted opposite, the play between the rotatable roller (8) and the contact roller (7, 9, 11) essentially the total thickness of the superimposed film layers of the tubular film (3) is the same. 4. Vorrichtung nach Anspruch 2 und 3, dadurch gekennzeichnet, daß eine der Druckrollen (13) von der anderen mit ihr zusammenarbeitenden Druckrolle (12) abhebbar ist.4. Apparatus according to claim 2 and 3, characterized in that one of the pressure rollers (13) of the other pressure roller (12) cooperating with it can be lifted off.
DE19732310596 1972-03-15 1973-03-02 Method and device for producing bags from thermoplastic material Expired DE2310596C3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL727203390A NL154451B (en) 1972-03-15 1972-03-15 DEVICE FOR MANUFACTURING PLASTIC BAGS.
NL7203390 1972-03-15

Publications (3)

Publication Number Publication Date
DE2310596A1 DE2310596A1 (en) 1973-09-20
DE2310596B2 true DE2310596B2 (en) 1976-04-08
DE2310596C3 DE2310596C3 (en) 1976-11-25

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734578A1 (en) * 1997-08-09 1999-02-11 Peter Becker Device to weld foil material like transparent wrappings and document covers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734578A1 (en) * 1997-08-09 1999-02-11 Peter Becker Device to weld foil material like transparent wrappings and document covers

Also Published As

Publication number Publication date
DK132524B (en) 1975-12-22
CH553093A (en) 1974-08-30
SE391477B (en) 1977-02-21
FI57368B (en) 1980-04-30
RO64790A (en) 1980-01-15
NO138516C (en) 1978-09-20
ES412677A1 (en) 1976-01-01
FR2176442A5 (en) 1973-10-26
FI57368C (en) 1980-08-11
AT334188B (en) 1976-01-10
ATA233273A (en) 1976-04-15
DD102639A5 (en) 1973-12-20
ZA731487B (en) 1973-11-28
BE796796A (en) 1973-09-17
NO138516B (en) 1978-06-12
AU464127B2 (en) 1975-08-14
IE37365B1 (en) 1977-07-06
CA1005333A (en) 1977-02-15
NL154451B (en) 1977-09-15
NL7203390A (en) 1973-09-18
DE2310596A1 (en) 1973-09-20
CS200454B2 (en) 1980-09-15
BR7301859D0 (en) 1974-07-25
PL91813B1 (en) 1977-03-31
SU686606A3 (en) 1979-09-15
SU876054A3 (en) 1981-10-23
AU5307673A (en) 1974-09-12
IE37365L (en) 1973-09-15
IT982323B (en) 1974-10-21
HU171976B (en) 1978-04-28
BG28409A3 (en) 1980-04-15
GB1426814A (en) 1976-03-03
DK132524C (en) 1976-05-24

Similar Documents

Publication Publication Date Title
DE2702221C3 (en) Method for producing an oriented plastic net
DE2951449A1 (en) METHOD AND DEVICE FOR PRODUCING DOUBLE-LAYERED RAILWAY MATERIAL
DE2544128A1 (en) MULTIPLE STRIP CABLES AND METHOD OF MANUFACTURING IT
CH618936A5 (en)
DE1504090B2 (en) Method and device for producing a plastic composite film embossed on at least one side for upholstery purposes
DE8020981U1 (en) DEVICE FOR PRODUCING A RAIL-SHAPED COMPOSITE BODY
DE2526267A1 (en) BAND SEALING MACHINE FOR THE SEALING OF BAGS
DE2744506C2 (en) Tape-like packaging material and method for its manufacture
DE2445255A1 (en) TRAIL OF PLASTIC BAGS AND PROCESS AND DEVICE FOR MANUFACTURING SUCH A WEB
DE1660022C3 (en) Device for the continuous production of a fibrous, helically wound, tubular insulating body
DE2309262C3 (en) Process for coextruding a three-layer composite hose and device for carrying out the process
DE1915768A1 (en) Method and device for the production of tubular objects from foamed thermoplastic resin
DE4121427A1 (en) Welding seam mfr. on multilayer tubular packaging - has layer compatible with contents welded on inner face of seam to prevent extrusion of chemically impure layers
DE2310596C3 (en) Method and device for producing bags from thermoplastic material
DE2310596B2 (en) METHOD AND DEVICE FOR MANUFACTURING BAGS FROM THERMOPLASTIC PLASTIC
DE2136455C3 (en)
DE2014873C2 (en) Method and device for producing tube bodies
DE1162543B (en) Process for the production of plastic ducts
DE3610656C2 (en) Hose and manufacturing method
DE3724514A1 (en) Process for the continuous production of branch caps or dividing caps from plastic which recovers its shape on heating
EP3368423B1 (en) Method and device for packaging soft bitumen
DE2710035C3 (en) Process for reinforcing flat tubular films by means of ribbons
DE1611643A1 (en) Method and device for the production of a multilayer collapsible bag
DE19508155A1 (en) Welding film material into foodstuff packaging
DE1926838A1 (en) Device and method for the production of electrical cables and electrical cables produced therewith

Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee