FI57368B - FOERFARINGSSAETT OCH ANORDNING FOER KONTINUERLIG TILLVERKNING AV PLASTPAOSAR - Google Patents

FOERFARINGSSAETT OCH ANORDNING FOER KONTINUERLIG TILLVERKNING AV PLASTPAOSAR Download PDF

Info

Publication number
FI57368B
FI57368B FI780/73A FI78073A FI57368B FI 57368 B FI57368 B FI 57368B FI 780/73 A FI780/73 A FI 780/73A FI 78073 A FI78073 A FI 78073A FI 57368 B FI57368 B FI 57368B
Authority
FI
Finland
Prior art keywords
film
rollers
roll
sealing member
tubular film
Prior art date
Application number
FI780/73A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI57368C (en
Inventor
Arnoldus Willem Jan Leloux
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
Application granted granted Critical
Publication of FI57368B publication Critical patent/FI57368B/en
Publication of FI57368C publication Critical patent/FI57368C/en

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

KUULUTUSjULKAISU ς 7 T * O jGTa L J ^UTLÄCGNINGfSKIUFT0 röOOADVERTISEMENT ς 7 T * O jGTa L J ^ UTLÄCGNINGfSKIUFT0 röOO

c (45) rai.i-iu y :·.'·· - 11 -·' ^ ^ ^ (51) Kv.lk?/lnfcCI.3 B 31 B 1/64 SUOM I — FI N LAN D (21) P«t*nttll^*mu* —Ρ.ΜΜυηυβΙο»»^ 7Ö0/73 (22) Hakamltpilvl—AfwOknlnpdii 1¾.03.73 (23) AlkupUv·—GlMgh«tad*f 1^.03.73 (41) Tullut |ulklMksl — Bllvtt effumllg 16.09.73c (45) rai.i-iu y: ·. '·· - 11 - ·' ^ ^ ^ (51) Kv.lk?/lnfcCI.3 B 31 B 1/64 ENGLISH I - FI N LAN D (21 ) P «t * nttll ^ * mu * —Ρ.ΜΜυηυβΙο» »^ 7Ö0 / 73 (22) Hakamltpilvl — AfwOknlnpdii 1¾.03.73 (23) AlkupUv · —GlMgh« tad * f 1 ^ .03.73 (41) Tullut | ulklMksl - Bllvtt effumllg 16.09.73

Patentti, ja rakisteHhallitu. NihtMWp™,. kuuLjuik*™ pvm._ ,Patent, and constructionManaged. NihtMWp ™ ,. month * ™ date_,

Patent- och ragistarstyralaan v ' Ameku uttagd ech utukriftM pubiicurad 30.0U.80 (32)(33)(31) Pfidutty etuoikeus—Bujtrt prlorltut 15.03.72Patent- och ragistarstyralaan v 'Ameku uttagd ech utukriftM pubiicurad 30.0U.80 (32) (33) (31) Pfidutty etuoikeus — Bujtrt prlorltut 15.03.72

Alankomaat-Nederländerna(NL) 7203390 (71) Wavin B.V., 251 Händellaan, Zwolle, Alankojnaat-Nederländerna(NL) (72) Arnoldus Willem Jan Leloux, Dedemsvaart, Alankomaat-Nederländerna(NL) (7U) Berggren Oy Ab (5U) Menetelmä ja laite muovipussien jatkuvaksi valmi stand seksi - Förfa-ringssätt och anordning för kontinuerlig tillverkning av plastp&sar Tämä keksintö koskee muovipussien jatkuvaa valmistusmenetelmää, jossa saumauselimen avulla muodostetaan ohjatusta putkimaisesta, kuumassa pehmenevästä kalvosta pusseja, jotka sitten joko erotetaan kalvo-nauhasta tai tiiviin liitoksen läheisyyteen tehdään rei'itys, jonka avulla pussi voidaan irrottaa.Netherlands-Nederländerna (NL) 7203390 (71) Wavin BV, 251 Handel, Zwolle, Netherlands-Nederländerna (NL) (72) Arnoldus Willem Jan Leloux, Dedemsvaart, Netherlands-Nederländerna (NL) (7U) Berggren Oy Ab (5U) Method The present invention relates to a method for the continuous production of plastic bags, in which bags are formed from a guided tubular, heat-softening film by means of a sealing member, which are then either separated from the film-sealing tape or means for removing the bag.

Sellainen menetelmä on jo ennestään tunnettu. Tällä menetelmällä on kuitenkin se haittapuoli, että saumauselimen käyttämisen johdosta muovi kutistuu tiiviin liitoksen kohdalta, mikä heikentää muovikalvoa ja tuloksena on usein huonompi sauma.Such a method is already known. However, this method has the disadvantage that the use of a sealing member causes the plastic to shrink at the tight joint, which weakens the plastic film and often results in a poorer joint.

On selvää, että kutistuminen heikentää pussia, sen seinämät eivät ole vahvat, vaan pussi repeää helposti, kun se täytetään.It is clear that shrinkage weakens the bag, its walls are not strong, and the bag tears easily when filled.

Näitä vaikeuksia on yritetty voittaa leikkaamalla putkimainen kalvo ennen kuin tiivis liitos muodostetaan ja muodostamalla tiivis liitos putkimaisen kalvon osan vapaaseen päähän. Tällä suoritustavalla on se etu, että muovi voi kutistua molemmista päistä tiiviin liitoksen suunnassa, jolloin seinämien heikkenemistä ei tapahdu ja pussin laatu paranee huomattavasti.Attempts have been made to overcome these difficulties by cutting the tubular film before forming the tight joint and forming a tight joint at the free end of a portion of the tubular film. This embodiment has the advantage that the plastic can shrink from both ends in the direction of the tight joint, whereby no deterioration of the walls occurs and the quality of the bag is considerably improved.

t 2 57368 Tällä pussien valmistusmenetelmällä on kuitenkin se varjopuoli, että pusseja ei voida markkinoida nauhoina, jotka sisältävät pussit jonossa peräkkäin liitettyinä toisiinsa rei’ityksen avulla. Ohutkalvoiset muovipussit, joihin voidaan pakata talousjätteitä, toimitetaan nykyään mieluimmin tällaisina nauhoina.t 2 57368 However, this method of making bags has the disadvantage that the bags cannot be marketed as strips containing the bags in a row connected in series by perforation. Thin-film plastic bags in which household waste can be packed are now preferably supplied in such strips.

Tämän keksinnön tarkoituksena on saada aikaan menetelmä, jossa ei ole tätä pulmaa, vaan pussit ovat nauhoissa peräkkäin liitettyinä toisiinsa rei’ityksen avulla, niissä oleva tiivis liitos on laadultaan erinomainen, eikä sen tekeminen aiheuta seinämissä paikoitellen heikentymisiä, jotka ovat kiusallisia.The object of the present invention is to provide a method in which there is no such problem, but the bags are connected to one another in the strips by perforation, the tight connection in them is of excellent quality and does not cause embarrassing deteriorations in the walls in places.

Tämä saadaan keksinnön mukaisesti aikaan sellaisella toimenpiteellä, että kuumennettu saumauselin saatetaan kosketuksiin litistetyn putkimaisen kalvon toisen sivun kanssa pingoittamatta kalvoa, kuumennettu saumauselin poistetaan sen jälkeen, kun toisiinsa liitettävät pinnat ovat pehmenneet, minkä jälkeen toisiinsa hitsattavat osat kuljetetaan kahden puristusvalssin väliin, joita painetaan yhteen, ja näistä valsseista ainakin toisen pinta pidetään lämpötilassa, joka on alempi kuin termoplastillisen aineen pehmenemispiste, mieluimmin 50°C:ssa tai sen alla ja kaikkein mieluimmin samassa kuin ympäristön lämpötila tai sen alapuolella.This is achieved according to the invention by contacting the heated sealing member with one side of the flattened tubular film without tensioning the film, removing the heated sealing member after the surfaces to be joined have softened, and then transporting the parts to be welded between two press rolls pressed together, and the surface of at least one of these rollers is maintained at a temperature lower than the softening point of the thermoplastic material, preferably at or below 50 ° C and most preferably at or below ambient temperature.

Kun käytetään tällaista saumausmenetelmää, on saatu tiivis liitos parempi kuin tunnetun menetelmän avulla aikaansaatu. Tämä johtuu todennäköisesti siitä, että muovimateriaali ensiksi pehmennetään puristamatta liitoskohtaa, minkä jälkeen se joutuu jäähdyttävien valssien puristukseen, jolloin lämpö haihtuu nopeasti ja tällöin siis tapahtuu välttämätön päällekkäisten kalvokerrosten puristaminen vastakkain.When such a sealing method is used, the tight connection obtained is better than that obtained by the known method. This is probably due to the fact that the plastic material is first softened without pressing the joint, after which it is subjected to the pressing of the cooling rollers, whereby the heat evaporates quickly and thus the necessary pressing of the overlapping film layers takes place.

Ainakin toisen puristavan valssin pinta jäähdytetään jollakin jäähdytysaineella, esimerkiksi puhaltamalla ympäröivää ilmaa vals-seihin, joista ainakin toinen on tehty metallista. Kalvon pinta, joka joutuu kontaktiin saumauselimen kanssa, koskettaa metallipin-taa ilman eristyskerrosta.The surface of at least the second compression roll is cooled by a coolant, for example by blowing ambient air into the rolls, at least one of which is made of metal. The surface of the film which comes into contact with the sealing member contacts the metal surface without the insulating layer.

Kun käytetään kuumennettua saumauselintä, niin putkimainen kalvonauha voidaan kuljettaa yhden tai useamman kerran valssien läpi, jotka on sijoitettu toisiinsa nähden siten, että niiden väli vastaa päällekkäin olevien kalvokerrosten kokonaispaksuutta.When a heated sealing member is used, the tubular film strip can be passed one or more times through rollers arranged relative to each other so that the distance between them corresponds to the total thickness of the overlapping film layers.

Tällä tavoin varmistetaan näiden kahden kalvokerroksen juuri sopiva kosketus, niin että ne kiinnittyvät toisiinsa erittäin hyvin kulkiessaan myöhemmin puristusvalssien läpi.In this way, just the right contact between the two film layers is ensured, so that they adhere to each other very well as they pass later through the press rollers.

Kalvomateriaalin kuljetusnopeus saumauselimen työskentelyalu-eelta aina jäähdytysvalssien työskentelyalueelle saakka on pienempi 3 57368 kuin saumattavan putkimaisen kalvon syöttönopeus.The conveying speed of the film material from the working area of the sealing member to the working area of the cooling rollers is less than 57368 than the feeding speed of the tubular film to be sealed.

Sen jälkeen kun hitsattu sauma on kulkenut jäähdytysvalssien välistä, mutta ennen kalvomateriaalin uudistettua käsittelyä saumaus-elimellä kalvo vedetään liukuen puristusvalssien välistä jotta tasoitettaisiin kalvonauhan kuljetusnopeuksien erot.After the welded seam has passed between the cooling rollers, but before the film material is re-treated by the sealing member, the film is slidably pulled between the press rolls to compensate for differences in the transport speeds of the film strip.

Tiiviin liitoksen laadun parantamiseksi on edullista, että kalvonauhan seinämä heikennetään ennen saumausta lyhyen matkan päästä muodostettavaa liitosta. Tämä heikentäminen parantaa myös tiiviin liitoksen laatua, sillä tämän heikon alueen ansiosta, joka myöhemmin muodostaa irtireväistävän kohdan, materiaali voi kutistua tiiviin liitoksen suunnassa.In order to improve the quality of the tight joint, it is advantageous for the wall of the film strip to be weakened before the joint is formed at a short distance. This weakening also improves the quality of the tight joint, as this weak area, which later forms a tear-off point, can cause the material to shrink in the direction of the tight joint.

Kun käytetään edellä mainitun tyyppistä menetelmää, pitäisi kirjoitus painaa kalvonauhaan mieluummin saumauksen jälkeen siten, että se sijoittuu alueelle tiiviin liitoksen ja heikennetyn seinämä-kohdan väliin etäälle niistä. Tosiasiassa nykyään tavallisesti teksti painetaan ennen rei'itystä ja saumausta. Tämä on epäedullista, koska saumauselin joutuu usein kosketukseen painetun materiaalin kanssa ja se huonontaa saumauselimen suoritusta. Sitä paitsi painatus voidaan suorittaa tarkan etäisyyden päähän saumakohdasta.When using a method of the type mentioned above, the inscription should preferably be printed on the film strip after sealing so that it is located in the area between the tight joint and the weakened wall point away from them. In fact, today, text is usually printed before perforation and seaming. This is disadvantageous because the sealing member often comes into contact with the printed material and degrades the performance of the sealing member. Besides, the printing can be performed at a precise distance from the seam point.

Tämän keksinnön kohteena on myös laite, jonka avulla voidaan valmistaa muovipusseja, ja laitteessa on kuumennettu saumauselin, joka työskentelee putkimaisen kalvon päällä, jota ohjataan pyörivän valssin avulla, ja laitteeseen kuuluu syöttö- ja poistovalsseja ja ohjauselimiä putkimaista kalvoa varten, samoin kuin yksi tai useampia kuumennettavia saumauselimiä ja irrotus- ja/tai rei'itysvälineitä, ja sanotulle laitteelle on ominaista, että saumauselin tai -elimet on lämpöeristetty pyörivän valssin pinnan suhteen, ja että kalvonauhan kulkusuunnassa on asennettuna kaksi puristusvalssia välimatkan päähän pyörivästä valssista ja nämä puristusvalssit ovat yhteistyössä keskenään ja toinen niistä voidaan jäähdyttää.The present invention also relates to an apparatus for making plastic bags, the apparatus having a heated sealing member operating on a tubular film guided by a rotating roller, the apparatus comprising feed and discharge rollers and guide members for the tubular film, as well as one or more heatable sealing members and release and / or perforating means, said device being characterized in that the sealing member or members are thermally insulated with respect to the surface of the rotating roll and that two press rolls are spaced apart in the direction of travel of the film strip and the other press rollers co-operate with each other; can be cooled.

Koska saumauselin on termisesti eristetty pyörivän valssin pinnan suhteen, voidaan varmistaa, ettei johtavaa materiaalia olevan valssin lämpötila pääse nousemaan, tai se on ainakin huomattavasti muovin pehmenemispisteen alapuolella. Esimerkiksi polyetyleenillä tämä lämpötila on alle 60 C.Since the sealing member is thermally insulated with respect to the surface of the rotating roll, it can be ensured that the temperature of the roll of conductive material cannot rise, or is at least considerably below the softening point of the plastic. For example, with polyethylene, this temperature is below 60 ° C.

Puristusvalsseista on toinen edullisimmin metallia ja metalli-pinnan läpimitta on suuri lämmön haihtumista vartenj tämän vuoksi jäähdytysvalssin lämpötila ei ole juuri koskaan huoneen tai ympäristön lämpötilaa korkeampi.The second of the press rolls is most preferably metal and the diameter of the metal surface is large for heat evaporation and therefore the temperature of the cooling roll is almost never higher than the room or ambient temperature.

Pyörivän valssin vastakkaiselle puolelle sijoitetaan sopivasti yksi tai useampia kontaktilaitteita tai -valsseja ja pyörivän ja kon- « 57368 taktivalssin tai -laitteen vapaa väli säädetään aivan tarkalleen samaksi kuin putkimaisen kalvonauhan päällekkäisten kerrosten paksuus. Nämä kontaktilaitteet tai -valssit ovat edullisimmin vaahtokumia. Kontaktivalssien asemesta voidaan käyttää myös lakaisijoita, jotka voidaan asentaa pyörivän valssin pinnalle.One or more contact devices or rollers are suitably placed on the opposite side of the rotating roll, and the free space between the rotating and contact roll or device is adjusted to exactly the same thickness as the thickness of the overlapping layers of the tubular film strip. These contact devices or rollers are most preferably foam rubber. Instead of contact rollers, sweepers can also be used, which can be mounted on the surface of a rotating roller.

Tämän jälkeen keksintöä valaistaan viitaten mukana seuraavaan piirustukseen, jossa on esitetty keksinnön suoritustapa kaavamaisesti.The invention will now be illustrated with reference to the accompanying drawing, which schematically shows an embodiment of the invention.

Tämä laite käsittää pyörivällä alustalla olevan kelan 1, jossa on muovikalvo 3. Tämä kela lepää pyörivien kumivalssien 2 päällä, joita voidaan käyttää sellaisella kehänopeudella, joka vastaa haluttua muovinauhan kuljetusnopeutta.This device comprises a reel 1 on a rotating base with a plastic film 3. This reel rests on rotating rubber rollers 2 which can be operated at a circumferential speed corresponding to the desired conveyor speed of the plastic strip.

Moottorin nopeus voidaan tarkistaa muovikalvosta 3 heti kun se on ohittanut vedettävät ohjausvalssit 4.The speed of the motor can be checked on the plastic film 3 as soon as it has passed the towed guide rollers 4.

Ohjausvalssien jälkeen on asennettu lävistyslaite 5, jolla putkimaiseen kalvoon tehdään poikittainen rei’itysjuova,jota pitkirt pussit voidaan repäistä irti kalvonauhasta jälkeenpäin. Tämän rei'itys-laitteen 5 muodostaa pyörivä rumpu, jossa on ulokkeita, ja sen kanssa yhteistoiminnassa oleva pysäyttäjävalssi 6.After the guide rollers, a punching device 5 is installed, by means of which a transverse perforation line is made in the tubular film, which longitudinal bags can be torn off from the film strip afterwards. This perforating device 5 consists of a rotating drum with projections and a stop roller 6 cooperating with it.

Rei'ityksen jälkeen putkimainen nauha johdetaan pyörivän rummun 8 yli, jossa on metallipinta ja saumauselektrodi 10. Tämä saumaus-elektrodi on lämpöeristetty pyörivästä rummusta 8. Saumauselektrodi 10 on nimenomaan metallia, kuten esimerkiksi kuparia, joka on päällystetty teflonilla; elektrodi voidaan kuumentaa aina lämpötilaan 200-400° C saakka kuumennuselinten avulla (ei näy kuvassa) riippuen kalvon vahvuudesta, kuljetusnopeudesta ja kalvon tyypistä. Kalvonauha painetaan pingoittamatta saumauselektrodia 10 vasten ohjausvalssien 4 avulla. Kalvon pinnat tällöin pehmenevät ja kuumennetaan siihen lämpötilaan, missä ne voivat liittyä toisiinsa painettaessa. Valssin 8 pinnan, lukuunottamatta elektrodia 10, pitäisi olla lämpötilaltaan huomattavasti alhaisempi kuin muovin pehmenemispiste, esimerkiksi polyetylee-nin ollessa kyseessä alle 60°C, ja mieluimmin alle 30°C. Sen jälkeen kun kalvonauhan pinta on saavuttanut tämän lämpötilan, kalvonauha johdetaan pois saumauselektrodilta 10 ja kuljetetaan jäähdytysvalssin 12 ja puristusvalssin 13 välistä, jotka ovat yhteistoiminnassa keskenään. On havaittu, että puristus edellä tapahtuneen pehmennyksen jälkeen parantaa huomattavasti tiiviin liitoksen laatua. Jäähdytys-valssin 12 sisään on asennettu jäähdytysspiraali 18, jonka avulla jäähdytysvalssin 12 pinta voidaan pitää huoneen lämpötilassa tai sen alapuolella.After perforation, the tubular strip is passed over a rotating drum 8 having a metal surface and a sealing electrode 10. This sealing electrode is thermally insulated from the rotating drum 8. The sealing electrode 10 is specifically a metal such as copper coated with Teflon; the electrode can be heated up to 200-400 ° C by means of heating means (not shown) depending on the strength of the film, the transport rate and the type of film. The film strip is pressed against the sealing electrode 10 without tensioning by means of guide rollers 4. The surfaces of the film then soften and are heated to the temperature at which they can join together when pressed. The surface of the roll 8, with the exception of the electrode 10, should have a temperature considerably lower than the softening point of the plastic, for example in the case of polyethylene below 60 ° C, and preferably below 30 ° C. After the surface of the film strip has reached this temperature, the film strip is discharged from the sealing electrode 10 and conveyed between the cooling roll 12 and the compression roll 13, which cooperate with each other. It has been found that compression after the above softening greatly improves the quality of the tight joint. A cooling coil 18 is mounted inside the cooling roller 12, by means of which the surface of the cooling roller 12 can be kept at or below room temperature.

Jotta saumauselektrodin 10 työskentelyn aikana vältettäisiin ylemmän kalvokerroksen irtoaminen siitä kerroksesta, joka koskettaa 5 57368 saumauselintä, on asennettu kaksi kontaktivalssia 7 ja 9, jotka molemmat ovat vaahtokumia. Pienin etäisyys valssin 8 pinnan ja valssin 7 ja vastaavasti 9 välillä on sama kuin putkimaisen kalvon päällekkäisten kerrosten kokonaispaksuus.In order to avoid detachment of the upper film layer from the layer in contact with the sealing member 5 during operation of the sealing electrode 10, two contact rollers 7 and 9, both of which are foam rubber, are mounted. The minimum distance between the surface of the roll 8 and the roll 7 and 9, respectively, is equal to the total thickness of the overlapping layers of the tubular film.

Kontaktivalsseilla ei kuitenkaan ole mitään puristusvaikutusta. On huomattava, että saumauselektrodi 10 on asennettu valssin 8 pinnalle siten, että se on eristetty asbestieristyksen avulla. Valssien 7, 9 ja 11 tarkan asennon säätämiseksi on valsseissa uurre, jota pitkin valssin akselia voidaan siirtää.However, the contact rollers have no compression effect. It should be noted that the sealing electrode 10 is mounted on the surface of the roll 8 so that it is insulated with asbestos insulation. To adjust the exact position of the rollers 7, 9 and 11, the rollers have a groove along which the axis of the roller can be moved.

Puristusvalssin 13 pinta on mieluimmin kumia, mutta muitakin materiaaleja voidaan valita, esimerkiksi jotakin metalli^, joka on päällystetty teflonilla. Joissakin tapauksissa jälkimmäinen ratkaisu on edullisempi.The surface of the press roll 13 is preferably rubber, but other materials may be selected, for example a metal coated with Teflon. In some cases, the latter solution is more advantageous.

Jäähdytysvalssia 12 vastapäätä olevaan puristusvalssiin 13 on asennettu vipu 19*A lever 19 is mounted on the press roll 13 opposite the cooling roll 12 *

Ohjausvalssit 4 kuljettavat putkimaisen kalvon jonkin verran nopeammin kuin valssi 13 ja jäähdytysvalssi 12, niin että putkimainen kalvo koskettaa saumauselektrodia 10 pingoittamattomana.The guide rollers 4 convey the tubular film somewhat faster than the roller 13 and the cooling roll 12, so that the tubular film contacts the sealing electrode 10 without tension.

Sen jälkeen kun putkimainen kalvo on lähtenyt saumauselektro-dista 10 ja ennen kuin elektrodi kohtaa putkimaisen kalvon uudestaan, tämä vedetään liukuen valssien 12 ja 13 välistä kiristysvalssin 20 avulla, joka on yhteydessä jouseen 21. Täten vältetään liian suuren kaaren muodostuminen valssin 8 ja valssien 12 ja 13 välille. Sama tulos saadaan, kun valssi 13 siirretään kauemmaksi valssista 12.After the tubular film has left the sealing electrode 10 and before the electrode meets the tubular film again, this is pulled by sliding between the rollers 12 and 13 by means of a tensioning roller 20 connected to the spring 21. Thus avoiding excessive arcing between the roll 8 and the rollers 12 and 13 between. The same result is obtained when the roller 13 is moved further away from the roller 12.

Jäähdytysvalssin 12 ja puristusvalssin 13 toisella puolella menosuuntaan on asennettuna kaksi toistensa kanssa yhteistoiminnassa olevaa pyörivää valssia 14 ja 15, jotka liikuttavat putkimaista kalvoa samalla nopeudella kuin syöttövalssit 4.On the other side of the cooling roll 12 and the compression roll 13, in the forward direction, are mounted two rotating rollers 14 and 15 cooperating with each other, which move the tubular film at the same speed as the feed rollers 4.

Näiden valssien jälkeen putkimainen kalvo kulkee läpi painokoneen 18, jossa tapahtuu painaminen.After these rollers, the tubular film passes through a printing machine 18 where printing takes place.

Painettaessa teksti painetaan täsmälleen tiiviin liitoksen ja rei’ityksen väliin. Tämä ei ole kuitenkaan välttämätöntä, sillä myös tiiviin liitoksen ja rei’ityksen päälle voidaan painaa.When printed, the text is pressed exactly between the tight joint and the perforation. However, this is not necessary, as the tight connection and perforation can also be pressed.

Painokoneen jälkeen putkimainen kalvo kulkee laskostuskolmioon 16, missä putkimainen kalvo taitetaan kaksinkerroin, jonka jälkeen putkimainen kalvo kierretään kelauslaitteelle 17 kunnes esimerkiksi 20 pussia on yhteensä kierretty. Tällöin syötetyn kalvonauhan kierretty osa revitään irti rei'itystä myöten. Jotta tiivis liitos olisi paras mahdollinen, on edullista, että saumausrumpu 8 pyörii jonkin verran hitaammin kuin syöttövalssit 4. Kalvo puristuu saumausrurnmun päälle tällöin hyvin sopivasti ja ylempi kalvokerros kuumenee kunnolla.After the printing machine, the tubular film passes into a folding triangle 16, where the tubular film is folded twice, after which the tubular film is wound on the winding device 17 until, for example, 20 bags are twisted in total. In this case, the twisted part of the fed film strip is torn off along the perforation. In order to obtain the best possible tight connection, it is advantageous for the sealing drum 8 to rotate somewhat slower than the feed rollers 4. The film is then pressed onto the sealing drum very suitably and the upper film layer is heated properly.

Claims (7)

6 57368 Toisaalta on edullista käyttää puristusvalssia tai itse jäähdytys-valssia jonkin verran hitaammin kuin saumausrumpua.6 57368 On the other hand, it is advantageous to use the compression roll or the cooling roll itself somewhat slower than the sealing drum. 1. Muovipussien jatkuva valmistusmenetelmä, jossa saumauselin (10) vaikuttaa ohjatun putkimaisen termoplastista ainetta olevan kalvon (3) toiseen sivuun, saumaa jäähdytetään jäähdytetyllä telalla (12) ja muodostunut pussi joko erotetaan kalvonauhasta (3) tai tiiviin liitoksen tai muodostettavan tiiviin liitoksen läheisyyteen tehdään rei’itys, jonka avulla pussi voidaan irrottaa, tunnet-t u siitä, että kuumennettu saumauselin (10) saatetaan kosketuksiin litistetyn putkimaisen kalvon (3) toisen sivun kanssa pingoittamatta kalvoa (3)» kuumennettu saumauselin (10) poistetaan sen jälkeen, kun toisiinsa liitettävät pinnat ovat pehmenneet, minkä jälkeen toisiinsa hitsattavat osat kuljetetaan kahden puristusvalssin (12, 13) väliin, joita painetaan yhteen, ja näistä valsseista ainakin toisen (12) pinta pidetään lämpötilassa, joka on alempi kuin termoplastisen aineen pehmenemispiste, mieluummin 50°C:ssa tai sen alla ja kaikkein mieluimmin samassa kuin ympäristön lämpötila tai sen alapuolella.A continuous method of manufacturing plastic bags, wherein the sealing member (10) acts on one side of a guided tubular film of thermoplastic material (3), the seal is cooled by a cooled roll (12) and the formed bag is either separated from the film strip (3) or perforated. means for removing the bag, characterized in that the heated sealing member (10) is brought into contact with one side of the flattened tubular film (3) without tensioning the film (3) »the heated sealing member (10) is removed after the the surfaces are softened, after which the parts to be welded to each other are conveyed between two compression rollers (12, 13) which are pressed together, and at least one of these rollers (12) is kept at a temperature lower than the softening point of the thermoplastic, preferably at 50 ° C, or below and most preferably at or below ambient temperature. 2. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että kuumennetun saumauselimen (10) työskentelyn aikana kalvo-kerrokset joutuvat keskenään läheiseen kosketukseen ilman, että niitä puristettaisiin.A method according to claim 1, characterized in that during the operation of the heated sealing member (10) the film layers come into close contact with each other without being compressed. 3. Patenttivaatimuksen 1 tai 2 mukainen menetelmä, tunnet-t u siitä, että kalvomateriaalin kuljetusnopeus saumauselimen (10) työskentelyalueelta aina puristusvalsseille (12, 13) saakka on pienempi kuin hitsattavan putkimaisen kalvon (3) syöttönopeus. ^1. Patenttivaatimuksissa 1-3 esitetyn menetelmän soveltamiseen käytettävä laite, johon kuuluu syöttö- ja poistovalsseja (4, 14, 15. ja ohjauselimiä putkimaisen kalvon (3) kuljettamiseksi, ja yksi tai useampi pyörivän valssin (8) päälle sovitettu valssin (8) pinnasta termisesti eristetty kuumennettava saumauselin (10), joka joutuu kosketuksiin putkimaisen kalvon (3) toisen sivun kanssa ja jäähdytysvalssi (12), joka on sovitettu saumauselimen (10) jälkeen kalvon (3) kulkusuuntaan nähden, tunnettu siitä, että laitteessa on elimet (4, 12, 13), jotka pitävät putkimaisen kalvon (3) pääasiallisesti pingoittumattomana sen kulkusuunnassa hitsauksen aikana, että jonkin matkan päähän saumauselimestä (10) on sovitettu puristusvalssit (12, 13) yhteistoimintaan paine-elimien (19) kanssa, jotka painavat valsseja (12, 13) toisiaan vasten, ja että toinen valsseista (12) on varustettu jäähdytyselimillä (18). 7 57368Method according to Claim 1 or 2, characterized in that the conveying speed of the film material from the working area of the sealing element (10) to the press rolls (12, 13) is lower than the feed rate of the tubular film (3) to be welded. ^ 1. Apparatus for applying the method of claims 1-3, comprising feed and discharge rollers (4, 14, 15 and guide means for conveying the tubular film (3), and one or more thermally insulated surfaces of the roll (8) arranged on the rotating roll (8)). a heatable sealing member (10) in contact with one side of the tubular film (3) and a cooling roller (12) arranged downstream of the sealing member (10) relative to the direction of travel of the film (3), characterized in that the device has members (4, 12); 13), which keep the tubular film (3) substantially untensioned in the direction of travel during welding, that at some distance from the sealing member (10) press rollers (12, 13) are arranged to cooperate with pressure members (19) which press the rollers (12, 13) against each other and that one of the rollers (12) is provided with cooling members (18). 5. Patenttivaatimuksen 4 mukainen laite, tunnettu siitä, että pyörivää valssia (8) vastapäätä on asennettu yksi tai useampia kontaktilaitteita (7, 9» 11) ja että saumauselimen (10) ja kontak-tilaitteiden (7* 9, 11) vapaa väli on säädettävissä olennaisesti yhtä suureksi kuin putkimaisen kalvonauhan (3) päällekkäin olevien kerrosten kokonaispaksuus.Device according to Claim 4, characterized in that one or more contact devices (7, 9, 11) are mounted opposite the rotating roller (8) and in that the free distance between the sealing element (10) and the contact devices (7 * 9, 11) is adjustable to be substantially equal to the total thickness of the overlapping layers of the tubular film strip (3). 6. Patenttivaatimuksen 4 tai 5 mukainen laite, tunnettu siitä, että toinen puristusvalssi (13) voidaan siirtää pois toisen puristusvalssin (12) vierestä, niin että kalvomateriaali saa kulkea puristusvalssien ohitse ilman mainittujen valssien suorittamaa puristusvaihetta.Device according to claim 4 or 5, characterized in that the second press roll (13) can be moved away from the second press roll (12) so that the film material can pass the press rolls without a pressing step performed by said rollers. 7. Patenttivaatimusten 4-6 mukainen laite, tunnettu siitä, että siihen kuuluu jousikuormitteinen kiristysvalssi (20), joka on asennettuna puristusvalssien (12, 13) jälkeen kalvon kulkusuuntaan katsottuna.Device according to Claims 4 to 6, characterized in that it comprises a spring-loaded tensioning roller (20) which is mounted downstream of the pressing rollers (12, 13) in the direction of travel of the film.
FI780/73A 1972-03-15 1973-03-14 FOERFARINGSSAETT OCH ANORDNING FOER KONTINUERLIG TILLVERKNING AV PLASTPAOSAR FI57368C (en)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
FI57368B true FI57368B (en) 1980-04-30
FI57368C FI57368C (en) 1980-08-11

Family

ID=19815603

Family Applications (1)

Application Number Title Priority Date Filing Date
FI780/73A FI57368C (en) 1972-03-15 1973-03-14 FOERFARINGSSAETT OCH ANORDNING FOER KONTINUERLIG TILLVERKNING AV PLASTPAOSAR

Country Status (24)

Country Link
AT (1) AT334188B (en)
AU (1) AU464127B2 (en)
BE (1) BE796796A (en)
BG (1) BG28409A3 (en)
BR (1) BR7301859D0 (en)
CA (1) CA1005333A (en)
CH (1) CH553093A (en)
CS (1) CS200454B2 (en)
DD (1) DD102639A5 (en)
DK (1) DK132524C (en)
ES (1) ES412677A1 (en)
FI (1) FI57368C (en)
FR (1) FR2176442A5 (en)
GB (1) GB1426814A (en)
HU (1) HU171976B (en)
IE (1) IE37365B1 (en)
IT (1) IT982323B (en)
NL (1) NL154451B (en)
NO (1) NO138516C (en)
PL (1) PL91813B1 (en)
RO (1) RO64790A (en)
SE (1) SE391477B (en)
SU (2) SU876054A3 (en)
ZA (1) ZA731487B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55126457A (en) * 1979-03-24 1980-09-30 Noritsu Koki Kk Sealing and printing device
JP4829364B1 (en) * 2010-05-25 2011-12-07 トタニ技研工業株式会社 Bag making machine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872400C (en) * 1951-11-06 1953-03-30 Wolfgang Gloeyer Method for producing a liquid-tight bag from a tubular end of a thermoplastic plastic film
BE511226A (en) * 1952-05-07 1900-01-01
US2975824A (en) * 1953-01-19 1961-03-21 G M Pfaff A G Kaiserslautern P Device for seam welding thermoplastic synthetic materials
FR71043E (en) * 1956-09-17 1959-10-07 Process for manufacturing thermoplastic sachets
US2971874A (en) * 1960-03-14 1961-02-14 Equitable Paper Bag Co Method of making plastic bags
US3153607A (en) * 1961-05-08 1964-10-20 Vernon C Ambler Apparatus and method for heat sealing the longitudinal seams of heat sealable tubular webs
CH441724A (en) * 1965-02-22 1967-08-15 Centra Anstalt Machine for the manufacture and automatic dispensing of plastic bags to equipment
US3499817A (en) * 1966-09-06 1970-03-10 Dow Chemical Co Apparatus for the formation of seals in thermoplastic film
US3622421A (en) * 1967-02-27 1971-11-23 Continental Can Co Method for forming bags from thermoplastic tubing
US3509799A (en) * 1967-08-04 1970-05-05 Crown Zellerbach Corp Bag-forming method
CH505680A (en) * 1969-05-17 1971-04-15 Windmoeller & Hoelscher Machine for the production of heat-sealed flat bags

Also Published As

Publication number Publication date
RO64790A (en) 1980-01-15
IE37365L (en) 1973-09-15
DE2310596A1 (en) 1973-09-20
BG28409A3 (en) 1980-04-15
DK132524B (en) 1975-12-22
DK132524C (en) 1976-05-24
BR7301859D0 (en) 1974-07-25
BE796796A (en) 1973-09-17
NL154451B (en) 1977-09-15
SU686606A3 (en) 1979-09-15
SU876054A3 (en) 1981-10-23
IE37365B1 (en) 1977-07-06
GB1426814A (en) 1976-03-03
NO138516B (en) 1978-06-12
AT334188B (en) 1976-01-10
FI57368C (en) 1980-08-11
AU5307673A (en) 1974-09-12
ES412677A1 (en) 1976-01-01
CA1005333A (en) 1977-02-15
PL91813B1 (en) 1977-03-31
AU464127B2 (en) 1975-08-14
ATA233273A (en) 1976-04-15
SE391477B (en) 1977-02-21
CS200454B2 (en) 1980-09-15
NL7203390A (en) 1973-09-18
NO138516C (en) 1978-09-20
CH553093A (en) 1974-08-30
DE2310596B2 (en) 1976-04-08
ZA731487B (en) 1973-11-28
FR2176442A5 (en) 1973-10-26
HU171976B (en) 1978-04-28
DD102639A5 (en) 1973-12-20
IT982323B (en) 1974-10-21

Similar Documents

Publication Publication Date Title
US4253892A (en) Method and apparatus for making cushioned shipping bags
US3769124A (en) Method and apparatus for splicing foam sheet material
US2805973A (en) Method of making packaging materials
US3008862A (en) Extruded bead sealing
US5094657A (en) Method and apparatus for continuously forming and sealing low density polyethylene bags at high speed
US3361041A (en) Method and apparatus for making gusseted header bags
US10703051B2 (en) Fabric pinch sack-making machine, pinch sack and method for the production thereof
US3257256A (en) Device for welding and cutting thermoplastic webs
US2441940A (en) Method and apparatus for heat sealing shrinkable films
US4239064A (en) Insulation tubes and process of making same
CA2498201A1 (en) Conduits and method of forming
JPH05262335A (en) In-line application of closure to packaging film
US4436576A (en) Apparatus for forming bottom heat seals
US4169344A (en) Apparatus for fabricating cushioning and insulating material
SK280327B6 (en) Method and apparatus for forming a slice of a food item having a heat tack seal
US3960062A (en) Method of making a band of plastic bags
US3408242A (en) Process and apparatus for welding layers of thermoplastic material
US3853664A (en) Bag making machine and method
GB2033832A (en) Method and apparatus for making sacks which are open at one end and comprise an outer sack of woven plastics tape fabric
US3148598A (en) Making bags with enclosed stiffener at top
US4030956A (en) Method of manufacturing plastic bags in a continuous way
FI57368B (en) FOERFARINGSSAETT OCH ANORDNING FOER KONTINUERLIG TILLVERKNING AV PLASTPAOSAR
US2504500A (en) Tube forming apparatus
JPS63218B2 (en)
GB2120162A (en) Apparatus for forming tubular plastics sleeves for application to containers