CH701562A1 - Sealing device for sealing plastic films for production of packaging bags of liquid content, has sealing tool comprising sealing surfaces formed at different tool parts, where material of one tool part is elastically deformable - Google Patents

Sealing device for sealing plastic films for production of packaging bags of liquid content, has sealing tool comprising sealing surfaces formed at different tool parts, where material of one tool part is elastically deformable Download PDF

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Publication number
CH701562A1
CH701562A1 CH01134/09A CH11342009A CH701562A1 CH 701562 A1 CH701562 A1 CH 701562A1 CH 01134/09 A CH01134/09 A CH 01134/09A CH 11342009 A CH11342009 A CH 11342009A CH 701562 A1 CH701562 A1 CH 701562A1
Authority
CH
Switzerland
Prior art keywords
sealing
tool
sealing surface
counter
tool part
Prior art date
Application number
CH01134/09A
Other languages
German (de)
Other versions
CH701562B1 (en
Inventor
Martin Kropf
Andreas Hofer
Original Assignee
Elag Verpackungen Ag
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 Elag Verpackungen Ag filed Critical Elag Verpackungen Ag
Priority to CH01134/09A priority Critical patent/CH701562B1/en
Publication of CH701562A1 publication Critical patent/CH701562A1/en
Publication of CH701562B1 publication Critical patent/CH701562B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/007—Forming single grooves or ribs, e.g. tear lines, weak spots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • 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
    • B29C66/40—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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B29C66/53261—Enclosing tubular articles between substantially flat elements
    • B29C66/53262—Enclosing spouts between the walls of bags, e.g. of medical bags
    • B29C66/53263—Enclosing spouts between the walls of bags, e.g. of medical bags said spouts comprising wings, e.g. said spouts being of ship-like or canoe-like form to avoid leaks in the corners
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—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
    • B29C66/8126—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 intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81261—Thermal properties, e.g. thermal conductivity, thermal expansion coefficient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0013—Conductive
    • 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
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • 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
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/844—Applying rigid valves, spouts, or filling tubes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Package Closures (AREA)

Abstract

The device has a counter tool (7) and a sealing tool (1) comprising sealing surfaces (2, 3, 6) formed at different tool parts (5, 15), where material of one of the tool part e.g. profile, carrying one of the sealing surfaces is lighter than material of the other tool part carrying other sealing surfaces and is elastically deformable. The former sealing part is formed as a profile accommodated in a groove (4) of the latter tool part, and the seal surfaces are equipped with ribs. The counter tool and the sealing tool are formed as rollers and rotatable around an axis. An independent claim is also included for a method for sealing plastic films.

Description

[0001] Die Erfindung betrifft Siegelvorrichtung zum Siegeln von Folien aus Kunststoff untereinander oder von Folien mit Einschweissteilen, bestehend aus einem Siegelwerkzeug und einem Gegenwerkzeug. The invention relates to sealing device for sealing films made of plastic with each other or of films with Einschweissteilen, consisting of a sealing tool and a counter tool.

[0002] Solche Siegelvorrichtungen sind bekannt und werden beispielsweise in der Produktion von Verpackungsbeuteln verwendet. Dabei werden Folien miteinander verschweisst oder es werden Einschweissteile wie beispielsweise Ausgüsse oder Ventile mit Folien verschweisst. Such sealing devices are known and used for example in the production of packaging bags. In this case, films are welded together or welding parts such as spouts or valves are welded with films.

[0003] Insbesondere Schweissnähte an Verpackungsbeuteln für flüssige Inhalte müssen im Wesentlichen zwei Anforderungen erfüllen. Einerseits müssen sie eine gute Festigkeit aufweisen, damit der Beutel auch Stösse, beispielsweise durch Herunterfallen, aushält, andererseits müssen sie natürlich dicht sein. Diese beiden Eigenschaften stehen in einem Zusammenhang, wie nachstehend erläutert wird. In particular, welds on packaging bags for liquid contents must meet two main requirements. On the one hand, they must have a good strength, so that the bag can withstand bumps, for example by falling down, on the other hand, of course, they must be tight. These two properties are related, as explained below.

[0004] Beim Herstellen derartiger Schweissnähte sind abgesehen von den zu verbindenden Werkstoffen vor allem die Temperatur der Schweisswerkzeuge, deren Einwirkungsdauer und der durch sie auf die Folien ausgeübte Druck massgebend. Zum Erreichen einer vollständigen Dichtheit ist man beim Schweissen bestrebt, einen relativ hohen Druck auf die Folien auszuüben, damit sich die Folienschichten lückenlos verbinden. Dies kann zu einer Reduktion der Foliendicke führen, insbesondere in Bereichen, in denen unterschiedliche Anzahlen von Folien zu verbinden sind, etwa bei Seitennähten von Standbodenbeuteln im Bereich des M-förmigen Boden-Einsatzes. Mit einer reduzierten Foliendicke geht unvermeidbar eine mechanische Schwächung einher, so dass tendenziell eine gute Dichtheit zu einer schlechten Festigkeit führt und umgekehrt. Dieser Effekt wird oft noch durch Kerbwirkung verstärkt, die durch Materialanhäufungen verursacht werden kann, welche durch Austreten von beim Schweissen plastifiziertem Folienmaterial an der Innenseite der Schweissnaht entstanden sind. Diese Problematik ist beispielsweise im Teil 2 der Artikelreihe «Sie Siegelnaht unter der Lupe» beschrieben, die in der Zeitschrift «Packreport», Ausgabe 4/2009 erschienen ist. Bisher ist man diesem Problem mit Kompromissen begegnet, beispielsweise indem man den angewandten Werkzeugdruck auf einen Mittelwert einstellte oder das Siegelverfahren in mehrere Verfahrensschritte aufteilte. Weitere bekannte Kompromisse bestehen darin, dass dickere oder hochwertigere und damit teurere Folien verwendet werden, als eigentlich nötig wären, um die durch die Naht reduzierte Festigkeit zu kompensieren. When producing such welds, apart from the materials to be joined, especially the temperature of the welding tools, their duration of action and the pressure exerted by them on the films pressure prevail. In order to achieve a complete tightness welding is aimed at exerting a relatively high pressure on the films so that the film layers connect seamlessly. This can lead to a reduction of the film thickness, in particular in areas in which different numbers of films are to be joined, for example in side seams of stand-up pouches in the region of the M-shaped bottom insert. With a reduced film thickness is inevitably accompanied by a mechanical weakening, so that tends to a good tightness leads to poor strength and vice versa. This effect is often enhanced by notch effect, which can be caused by material accumulations, which are caused by leakage of plasticized when welding film material on the inside of the weld. This problem is described, for example, in part 2 of the article series "Sie Sienahnaht under the magnifying glass", which appeared in the magazine "Packreport", issue 4/2009. So far, this problem has been met with compromises, for example by setting the applied tool pressure to an average or dividing the sealing process into several process steps. Further known compromises are that thicker or higher quality and therefore more expensive films are used, as would actually be necessary to compensate for the seam reduced by the strength.

[0005] Um Unebenheiten von Siegelstellen auszugleichen, wurde auch schon vorgeschlagen, beispielsweise durch EP538 636A1, ein Siegelwerkzeug mit einem Kissen aus einem elastischen Werkstoff auszustatten. Zur Wärmeübertragung auf das zu schweissende Material wird das Kissen vor jedem Siegelvorgang mit einem beheizbaren Körper in Kontakt gebracht. To compensate for unevenness of seal points, has also been proposed, for example, by EP538 636A1 to equip a sealing tool with a cushion of an elastic material. For heat transfer to the material to be welded, the pad is brought into contact with a heatable body before each sealing operation.

[0006] Grundsätzlich gehört zum Siegeln sowohl eine Erwärmung als auch eine anschliessende Abkühlung der zu verbindenden Werkstoffe, wobei für beide Prozesse gleiche oder ähnliche Werkzeuge verwendbar sind. Daher ist in diesem Dokument unter dem Begriff Siegelwerkzeug sowohl ein heizbares als auch auf ein kühlbares Werkzeug zu verstehen. Basically, the sealing includes both a heating and a subsequent cooling of the materials to be joined, wherein the same or similar tools are used for both processes. Therefore, in this document, the term sealing tool is understood to mean both a heatable and a coolable tool.

[0007] Ausgehend von diesem Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zu Grunde, ein Siegelwerkzeug vorzuschlagen, mit dem Verbindungen herstellbar sind, welche gleichzeitig die Anforderungen sowohl hinsichtlich der Festigkeit als auch der Dichtheit erfüllen, wobei gleichzeitig bei der Verwendung des Siegelwerkzeugs weniger Kompromisse eingegangen werden müssen als bei der Verwendung bekannter Siegelwerkzeuge. Based on this prior art, the present invention, the object of providing a sealing tool, can be produced with the compounds that simultaneously meet the requirements both in terms of strength and tightness, at the same time when using the sealing tool less Compromises have to be made than with the use of known sealing tools.

[0008] Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass das Siegelwerkzeug mindestens zwei Siegelflächen aufweist, dass eine erste Siegelfläche und eine zweite Siegelfläche an unterschiedlichen Werkzeugteilen ausgebildet sind und dass der Werkstoff des die erste Siegelfläche tragenden Werkzeugteils weicher ist als der Werkstoff des die zweite Siegelfläche tragenden Werkzeugteils. This object is achieved in that the sealing tool has at least two sealing surfaces, that a first sealing surface and a second sealing surface are formed on different tool parts and that the material of the first sealing surface bearing tool part is softer than the material of the second sealing surface carrying tool part.

[0009] Beim Einsatz des erfindungsgemässen Siegelwerkzeugs wird der die erste Siegelfläche tragende Werkzeugteil während des Siegelvorgangs elastisch deformiert und dadurch der durch die betreffende Siegelfläche auf das zu verbindende Material ausgeübte Druck begrenzt, so dass eine die Festigkeit der zu verbindenden Teile beeinträchtigende Materialschwächung vermieden oder zumindest reduziert wird. Die benachbarte, an einem härteren Werkzeugteil ausgebildete Siegelfläche erzeugt gleichzeitig einen Siegelbereich, in dem das zu verbindende Material weniger stark gepresst und deformiert wird, so dass dieser Siegelbereich hohen Anforderungen an seine Festigkeit genügt. Ein weiterer wesentlicher Vorteil des erfindungsgemässen Werkzeugs besteht darin, dass durch die nachgiebige Verformbarkeit des die erste Siegelfläche tragenden Werkzeugteils Positions- und Werkstoffdicken-Schwankungen sowie Werkzeugformtoleranzen aufgefangen werden. Insgesamt resultiert bei der Verwendung der erfindungsgemässen Vorrichtung eine Material- und Energieersparnis, was zu einer Reduktion der Kosten im Herstellungsprozess von Folienprodukten führt. When using the inventive sealing tool of the first sealing surface bearing tool part is elastically deformed during the sealing process and thereby limits the pressure exerted by the relevant sealing surface on the material to be joined pressure, so that the strength of the parts to be joined impairing material weakening avoided or at least is reduced. The adjacent sealing surface formed on a harder tool part simultaneously generates a sealing region in which the material to be bonded is less strongly pressed and deformed, so that this sealing region meets high demands on its strength. A further significant advantage of the tool according to the invention is that position and material thickness variations and tool shape tolerances are absorbed by the yielding deformability of the tool part carrying the first sealing surface. Overall, when using the device according to the invention results in a material and energy savings, which leads to a reduction of costs in the production process of film products.

[0010] Besondere Ausführungsarten der erfindungsgemässen Siegelvorrichtung sind in den abhängigen Patentansprüchen umschrieben. Particular embodiments of the inventive sealing device are described in the dependent claims.

[0011] Die Erfindung betrifft auch ein Verfahren zum Siegeln von Folien aus Kunststoff entsprechend dem unabhängigen Patentanspruch 11. The invention also relates to a method for sealing films made of plastic according to independent claim 11.

[0012] Ausführungsbeispiele der Erfindung werden nachstehend unter Bezugnahme auf die angefügten Zeichnungen näher beschrieben. Es zeigt <tb>Fig. 1<sep>ein erstes Ausführungsbeispiel einer Siegelvorrichtung im Querschnitt, <tb>Fig. 2<sep>das erste Ausführungsbeispiel in einem gegenüber Fig. 1 vergrösserten Massstab, wobei die Vorrichtung links in offenem und rechts in geschlossenem Zustand dargestellt ist, <tb>Fig. 3<sep>eine Querschnittdarstellung einer weiteren Ausführungsart der Siegelvorrichtung, <tb>Fig. 4<sep>im Querschnitt eine Weiterbildung der Ausführungsart gemäss Fig. 3, <tb>Fig. 5<sep>eine perspektivische Darstellung einer Siegelvorrichtung zum Verbinden von Folien mit einem Einschweissteil, <tb>Fig. 6<sep>eine andere Ausführungsart der Siegelvorrichtung in einer perspektivischen Darstellung und <tb>Fig. 7<sep>einen Querschnitt einer Siegelvorrichtung mit Siegelflächen mit Rippen.Embodiments of the invention will be described below with reference to the accompanying drawings. It shows <Tb> FIG. 1 <sep> a first embodiment of a sealing device in cross-section, <Tb> FIG. 2 <sep> the first embodiment in a comparison with FIG. 1 enlarged scale, the device is shown on the left in the open and right in the closed state, <Tb> FIG. 3 <sep> is a cross-sectional view of another embodiment of the sealing device, <Tb> FIG. 4 <sep> in cross section a development of the embodiment according to FIG. 3, <Tb> FIG. 5 <sep> is a perspective view of a sealing device for joining foils to a welding part, <Tb> FIG. 6 <sep> another embodiment of the sealing device in a perspective view and <Tb> FIG. 7 <sep> is a cross section of a sealing device with sealing surfaces with ribs.

[0013] Fig. 1 zeigt in einer Schnittdarstellung ein erstes Ausführungsbeispiel eines erfindungsgemässen Siegelwerkzeugs 1. Der Körper 15 des Siegelwerkzeugs 1 weist nicht dargestellte Mittel zum Heizen oder Kühlen des Siegelwerkzeugs 1 auf. Das Siegelwerkzeug weist zwei Siegelflächen 2 und 3 auf, die in der gleichen Ebene liegen und durch eine Längsnute 4 voneinander getrennt sind. In der Längsnut 4 ist ein Profil 5 aus einem gummielastischen Material eingelegt, dessen in der Figur nach unten weisende Fläche eine weitere Siegelfläche 6 bildet. Der Körper des Siegelwerkzeugs 1 besteht vorzugsweise aus einem Metall, beispielsweise einer Legierung, die als Hauptbestandteil Stahl, Kupfer oder Aluminium enthält. Der Werkstoff, aus dem das Profil 5 besteht, muss so wärmebeständig sein, dass er der Temperatur, auf welche das Siegelwerkzeug 1 aufgeheizt wird, über lange Zeit standhält. Ausserdem muss dieser Werkstoff gummielastisch komprimierbar sein, wie des nachstehend an Hand der Fig. 2 erläutert wird. Wie aus Fig. 1ersichtlich, ist der Querschnitt der Längsnut 4 im Wesentlichen trapezförmig. Auch der Querschnitt des Profils 5 ist im Beispiel gemäss Fig. 1trapezförmig, so dass das Profil 5 in der Längsnut 4 formschlüssig festgehalten wird. Ausserdem ist in Fig. 1 noch ein Gegenwerkzeug 7 schematisch dargestellt, das im einfachsten Fall eine glatte Oberfläche hat, um die zu siegelnden Teile, insbesondere Folien 8, 9, zwischen dem Siegelwerkzeug 1 und dem Gegenwerkzeug 7 zu klemmen, wie dies nachstehend noch eingehender beschrieben wird. Fig. 1 shows a sectional view of a first embodiment of an inventive sealing tool 1. The body 15 of the sealing tool 1 has not shown means for heating or cooling of the sealing tool 1. The sealing tool has two sealing surfaces 2 and 3, which lie in the same plane and are separated by a longitudinal groove 4. In the longitudinal groove 4, a profile 5 is inserted from a rubber-elastic material, which in the figure downwardly facing surface forms a further sealing surface 6. The body of the sealing tool 1 is preferably made of a metal, for example an alloy containing as a main component steel, copper or aluminum. The material of which the profile 5 is made, must be so heat-resistant that it can withstand the temperature to which the sealing tool 1 is heated for a long time. In addition, this material must be elastically compressible, as will be explained below with reference to FIG. 2. As can be seen from Fig. 1, the cross section of the longitudinal groove 4 is substantially trapezoidal. In the example according to FIG. 1, the cross-section of the profile 5 is also trapezoidal, so that the profile 5 is held positively in the longitudinal groove 4. In addition, a counter tool 7 is shown schematically in Fig. 1, which in the simplest case has a smooth surface to clamp the parts to be sealed, in particular films 8, 9, between the sealing tool 1 and the counter tool 7, as will be discussed in more detail below is described.

[0014] Fig. 2 zeigt die Vorrichtung nach Fig. 1in einem gegenüber Fig. 1vergrösserten Massstab. Dabei ist links in der Figur die Siegelvorrichtung in geöffnetem Zustand dargestellt und rechts in geschlossenem Zustand während eines Siegelvorganges. Wie die Figur zeigt, ist das Profil 5 in der genannten Längsnut 4 formschlüssig aufgenommen. Links in der Figur wird mit der Bezugszahl 11 das Mass gezeigt, um welches das Profil 5 mit seiner Siegelfläche 6 bei unbelastetem Werkzeug über die Siegelflächen 2, 3 hinaus ragt. Mit der Bezugszahl 10 ist ein Raum bezeichnet, in den das Profil 5 bei Verformung durch Druck auf die Siegelfläche 6 ausweichen kann. Rechts in Fig. 2 ist Die Siegelvorrichtung geschlossen dargestellt, wie das während eines Siegelvorgangs der Fall ist. Das heisst, dass die Siegelflächen 2 und 3 so weit an das Gegenwerkzeug 7 angenähert sind, dass die Folien 8 und 9 mit verhältnismässig schwachem Druck gegeneinander gepresst werden. Verhältnismässig schwach heisst in diesem Zusammenhang, dass die Folien 8, 9 auch in plastifiziertem Zustand nicht so stark gequetscht werden, dass die eingangs beschriebenen unerwünschten Wirkungen eintreten. Auf diese Weise wird eine Siegelnaht mit einer guten mechanischen Festigkeit erhalten. In diesem Zustand ist das Profil 5 so weit elastisch komprimiert, dass seine Siegelfläche 6 mit den Siegelflächen 2 und 3 praktisch bündig ist. Die Rückstellkraft des Profils 5 hat zur Folge, dass der auf die Folien 8, 9 ausgeübte Druck im Bereich der Siegelfläche 6 grösser ist als im Bereich der benachbarten Siegelflächen 2 und 3. In der Folge kommt es im Bereich der Siegelfläche 6 zu einem Fliessen des plastifizierten Folienmaterials in Richtung der Folienebene, also in Fig. 2horizontal, weil das Material unter der Siegelfläche 6 durch den verstärkten Druck etwas verdrängt wird. Dies hat eine Durchmischung des Materials beider Folien zur Folge, wodurch die erwünschte Dichtheit der Siegelnaht erhalten wird. Fig. 2 shows the device according to Fig. 1 in a comparison with Fig. 1vergrösserten scale. The sealing device is shown on the left in the figure in the open state and right in the closed state during a sealing process. As the figure shows, the profile 5 is positively received in said longitudinal groove 4. On the left in the figure, the reference numeral 11 shows the dimension around which the profile 5 with its sealing surface 6 protrudes beyond the sealing surfaces 2, 3 when the tool is unloaded. Reference numeral 10 designates a space into which the profile 5 can deflect when deformed by pressure on the sealing surface 6. Right in Fig. 2, the sealing device is shown closed, as is the case during a sealing process. This means that the sealing surfaces 2 and 3 are so far closer to the counter tool 7 that the films 8 and 9 are pressed against each other with relatively low pressure. Relatively weak in this context means that the foils 8, 9 are not so strongly squeezed even in the plasticized state that the unwanted effects described in the introduction occur. In this way, a sealed seam having a good mechanical strength is obtained. In this state, the profile 5 is elastically compressed so far that its sealing surface 6 is practically flush with the sealing surfaces 2 and 3. The restoring force of the profile 5 has the consequence that the pressure exerted on the films 8, 9 pressure in the region of the sealing surface 6 is greater than in the region of the adjacent sealing surfaces 2 and 3. As a result, in the region of the sealing surface 6 to a flow of the plasticized sheet material in the direction of the film plane, ie in Fig. 2horizontal, because the material under the sealing surface 6 is slightly displaced by the increased pressure. This results in a thorough mixing of the material of both films, whereby the desired tightness of the sealed seam is obtained.

[0015] Das Ausführungsbeispiel gemäss Fig. 3ist ähnlich aufgebaut wie das anhand der Fig. 1 und 2 erläuterte Beispiel. An Stelle eines Profils 5 mit trapezförmigem Querschnitt ist in diesem Beispiel ein Profil 5 mit einem kreisrunden Querschnitt eingebaut. Ein solches Profil hat den Vorteil, dass die Siegelfläche anfänglich sehr klein ist, indem praktisch nur eine Mantellinie des einen kreiszylinderförmigen Körper bildenden Profils 5 mit der zu siegelnden Folie 8 in Berührung kommt, was eine relativ hohe Flächenpressung zur Folge hat. Mit dem Annähern des Siegelwerkzeugs 1 zum Gegenwerkzeug 7 und der gleichzeitigen elastischen Verformung des Profils 5 nimmt die Siegelfläche 6 zu und folglich der durch diese auf die Folien ausgeübte Druck ab. So wird rasch die erwünschte Durchmischung des Materials der beiden Folien erreicht, ohne dass dabei die Folien zu stark gequetscht und dadurch geschwächt werden. Ein ähnlicher Effekt kann beispielsweise auch durch eine dreieckförmige Querschnittsform des Profils 5 erreicht werden, wobei die Spitze des Dreiecks gegen das Gegenwerkzeug 7 weist. The exemplary embodiment according to FIG. 3 is constructed in a similar way to the example explained with reference to FIGS. 1 and 2. Instead of a profile 5 with a trapezoidal cross section, a profile 5 with a circular cross section is installed in this example. Such a profile has the advantage that the sealing surface is initially very small, by practically only one surface line of a circular cylindrical body forming profile 5 comes into contact with the film to be sealed 8, resulting in a relatively high surface pressure result. With the approach of the sealing tool 1 to the counter tool 7 and the simultaneous elastic deformation of the profile 5, the sealing surface 6 increases and consequently the pressure exerted by the latter on the films. Thus, the desired thorough mixing of the material of the two films is achieved quickly, without causing the films are too crushed and thus weakened. A similar effect can be achieved, for example, by a triangular cross-sectional shape of the profile 5, wherein the tip of the triangle faces the counter-tool 7.

[0016] Als Werkstoffe für das Profil eignen sich beispielsweise Silikonkautschuk VMQ oder Fluorkautschuk. Auch so genanntes metallisches Glas ist als Material für das Profil 5 geeignet. Es ist unerlässlich, dass der Werkstoff des Profils 5 eine Wärmebeständigkeit hat, um bei der Arbeitstemperatur des Siegelwerkzeuges 1 keinen Schaden zu nehmen. Zudem ist es erwünscht, dass der Werkstoff auch eine gute Wärmeleitfähigkeit hat. Obwohl die genannten Werkstoffe keine besonders gute Wärmeleitfähigkeit haben, wird bei der erfindungsgemässen Vorrichtung durch die benachbarten Siegelflächen 2 und 3 sowie gegebenenfalls auch durch das gegenwerkzeug 7 genügend Wärme eingebracht, um die beschriebene vorteilhafte Wirkung zu erzielen. Zusätzlich sind auch Massnahmen bekannt, mit denen sich die Wärmeleitfähigkeit der genannten Werkstoffe verbessern lässt. Ein Beispiel ist in der eingangs zitierten EP538 636A1 angegeben. Suitable materials for the profile are, for example, silicone rubber VMQ or fluororubber. Also so-called metallic glass is suitable as material for the profile 5. It is indispensable that the material of the profile 5 has a heat resistance so as not to be damaged at the working temperature of the sealing tool 1. In addition, it is desirable that the material also has a good thermal conductivity. Although the materials mentioned have no particularly good thermal conductivity, sufficient heat is introduced in the device according to the invention by the adjacent sealing surfaces 2 and 3 and possibly also by the counter-tool 7 in order to achieve the described advantageous effect. In addition, measures are also known with which the thermal conductivity of the materials mentioned can be improved. An example is given in the cited EP538 636A1.

[0017] Fig. 4 zeigt eine Variante des anhand der Fig. 3beschriebenen Beispiels. Dabei sind im Werkzeugkörper 15 zwei Profile 5 parallel nebeneinander angeordnet. Ferner ist in diesem Beispiel das Gegenwerkzeug 7 gleich ausgebildet wie das Siegelwerkzeug 1. Nach einer weiteren, nicht dargestellten Ausführungsart kann zwischen den beiden Profilen 5 eine nicht dargestellte Trenneinrichtung, beispielsweise ein Messer vorgesehen sein, beispielsweise um mit der Vorrichtung gesiegelte Produkte gleichzeitig von einer Bahn abzutrennen. Fig. 4 shows a variant of the described with reference to FIG. 3 example. In this case, two profiles 5 are arranged parallel to each other in the tool body 15. Further, in this example, the counter-tool 7 is the same as the sealing tool 1. According to another, not shown embodiment, a separating device, not shown, for example, a knife may be provided between the two profiles 5, for example, sealed with the device products simultaneously from a web separate.

[0018] Die in Fig. 5 illustrierte Ausführungsart der Vorrichtung ist zum Einschweissen eines Einschweissteils 13 zwischen zwei Folien 8 und 9 bestimmt. Wie die Figur deutlich zeigt, kann das Gegenwerkzeug 7 prinzipiell gleich aufgebaut sein wie das Siegelwerkzeug 1. Alle Siegelflächen haben dabei eine entsprechend der Form des Einschweissteils 13 angepasste Kontur. The illustrated in Fig. 5 embodiment of the device is intended for welding a Einschweissteils 13 between two sheets 8 and 9. As the figure clearly shows, the counter-tool 7 can in principle be of the same design as the sealing tool 1. All sealing surfaces have a shape that matches the shape of the welding-in part 13.

[0019] Wie Fig. 6 zeigt, können das Siegelwerkzeug 1 und das Gegenwerkzeug 7 auch als Rollen ausgebildet sein, um endlose Siegelnähte, beispielsweise an den Rändern von Folienbahnen 8, 9 herzustellen. Das Siegelwerkzeug 1 und das gegenwerkzeug 7 sind dabei auf Achsen 12 in Richtung der Pfeile 14 drehbar angeordnet. In Analogie zu den Fig. 1 bis 3 und 7 kann selbstverständlich als Gegenwerkzeug 7 alternativ auch eine glatte oder gerippte Rolle ohne eingesetztes Profil verwendet werden. As shown in FIG. 6, the sealing tool 1 and the counter tool 7 may also be formed as rollers to produce endless sealing seams, for example at the edges of film webs 8, 9. The sealing tool 1 and the counter tool 7 are rotatably arranged on axes 12 in the direction of the arrows 14. By analogy with FIGS. 1 to 3 and 7, of course, a smooth or ribbed roll without an inserted profile can alternatively also be used as the counter-tool 7.

[0020] Schliesslich zeigt Fig. 7, dass sowohl die Siegelflächen 2 und 3 als auch die Siegelfläche des Gegenwerkzeugs 7 Rippen aufweisen können. Dabei sind vorzugsweise einander gegenüberliegende Rippen des Siegelwerkzeugs 1 und des Gegenwerkzeugs 7 derart gegeneinander versetzt sein, dass die Folien bei geschlossenem Werkzeug zickzackförmig umgelenkt und nicht in ihrer Dicke geschwächt werden. Finally, Fig. 7 shows that both the sealing surfaces 2 and 3 and the sealing surface of the counter tool 7 may have ribs. In this case, preferably opposing ribs of the sealing tool 1 and the counter tool 7 are offset from each other in such a way that the films are deflected zigzag shape with the tool closed and not weakened in thickness.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

[0021] <tb>1<sep>Siegelwerkzeug <tb>2<sep>Siegelfläche <tb>3<sep>Siegelfläche <tb>4<sep>Längsnut <tb>5<sep>Profil <tb>6<sep>Siegelfläche <tb>7<sep>Gegenwerkzeug <tb>8<sep>erste Folie <tb>9<sep>zweite Folie <tb>10<sep>Raum <tb>11<sep>Distanz <tb>12<sep>Achse <tb>13<sep>Einschweissteil <tb>14<sep>Drehrichtung <tb>15<sep>Werkzeugkörper[0021] <Tb> 1 <sep> sealing tool <Tb> 2 <sep> sealing surface <Tb> 3 <sep> sealing surface <Tb> 4 <sep> longitudinal groove <Tb> 5 <sep> Profile <Tb> 6 <sep> sealing surface <Tb> 7 <sep> counter tool <tb> 8 <sep> first slide <tb> 9 <sep> second slide <Tb> 10 <sep> Room <Tb> 11 <sep> Distance <Tb> 12 <sep> axis <Tb> 13 <sep> welding part <Tb> 14 <sep> direction of rotation <Tb> 15 <sep> tool body

Claims (11)

1. Siegelvorrichtung zum Siegeln von Folien (8, 9) aus Kunststoff untereinander oder von Folien (8, 9) mit Einschweissteilen (13), bestehend aus einem Siegelwerkzeug (1) und einem Gegenwerkzeug (7), dadurch gekennzeichnet, dass das Siegelwerkzeug (1) mindestens zwei Siegelflächen (2, 3, 6) aufweist, dass eine erste Siegelfläche (6) und eine zweite Siegelfläche (2, 3) an unterschiedlichen Werkzeugteilen (5, 15) ausgebildet sind und dass der Werkstoff des die erste Siegelfläche (6) tragenden Werkzeugteils (5) weicher ist als der Werkstoff des die zweite Siegelfläche (2, 3) tragenden Werkzeugteils (15).1. A sealing device for sealing foils (8, 9) made of plastic with one another or of foils (8, 9) with weld-in parts (13), consisting of a sealing tool (1) and a counter-tool (7), characterized in that the sealing tool ( 1) at least two sealing surfaces (2, 3, 6), that a first sealing surface (6) and a second sealing surface (2, 3) on different tool parts (5, 15) are formed and that the material of the first sealing surface (6 ) carrying the tool part (5) is softer than the material of the second sealing surface (2, 3) supporting the tool part (15). 2. Siegelvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Werkstoff des die erste Siegelfläche (6) tragenden Werkzeugteils (5) gummielastisch verformbar ist.2. Sealing device according to claim 1, characterized in that the material of the first sealing surface (6) carrying the tool part (5) is elastically deformable. 3. Siegelvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Werkstoff des die erste Siegelfläche (6) tragenden Werkzeugteils (5) ein Elastomer ist.3. Sealing device according to claim 2, characterized in that the material of the first sealing surface (6) carrying the tool part (5) is an elastomer. 4. Siegelvorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der die erste Siegelfläche (6) tragende Werkzeugteil (5) ein Profil ist, das in einer Nut (4) des die zweite Siegelfläche (2, 3) tragenden Werkzeugteils (15) aufgenommen ist.4. Sealing device according to one of the preceding claims, characterized in that the first sealing surface (6) carrying the tool part (5) is a profile in a groove (4) of the second sealing surface (2, 3) supporting the tool part (15). is included. 5. Siegelvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass zwei Profile (5) parallel nebeneinander angeordnet sind.5. Sealing device according to claim 4, characterized in that two profiles (5) are arranged parallel to each other. 6. Siegelvorrichtung nach einem der Ansprüche 4 bis 5, dadurch gekennzeichnet, dass das Profil (5) einen rechteckigen, quadratischen, trapezförmigen, dreieckigen, ovalen oder kreisrunden Querschnitt hat.6. Sealing device according to one of claims 4 to 5, characterized in that the profile (5) has a rectangular, square, trapezoidal, triangular, oval or circular cross-section. 7. Siegelvorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die erste Siegelfläche (6) zwischen der zweiten Siegelfläche (2) und einer parallel zu dieser angeordneten dritten Siegelfläche (3) verläuft.7. Sealing device according to one of the preceding claims, characterized in that the first sealing surface (6) extends between the second sealing surface (2) and a third sealing surface (3) arranged parallel thereto. 8. Siegelvorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die zweite Siegelfläche (2, 3) mit Rippen ausgestattet ist.8. Sealing device according to one of the preceding claims, characterized in that the second sealing surface (2, 3) is provided with ribs. 9. Siegelvorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Gegenwerkzeug (7) mindestens zwei Siegelflächen aufweist, wobei die erste Siegelfläche und die zweite Siegelfläche des Gegenwerkzeugs an unterschiedlichen Werkzeugteilen ausgebildet sind und wobei der Werkstoff des die erste Siegelfläche tragenden Werkzeugteils weicher ist als der Werkstoff des die zweite Siegelfläche tragenden Werkzeugteils.9. Sealing device according to one of the preceding claims, characterized in that the counter-tool (7) has at least two sealing surfaces, wherein the first sealing surface and the second sealing surface of the counter-tool are formed on different tool parts and wherein the material of the first sealing surface bearing tool part is softer as the material of the second seal surface bearing tool part. 10. Siegelvorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Siegelwerkzeug (1) und das Gegenwerkzeug (7) als um jeweils eine Achse (12) drehbare Rollen ausgebildet sind und dass die Siegelflächen (2, 3, 6) am Aussenumfang der betreffenden Rolle angeordnet sind.10. Sealing device according to one of the preceding claims, characterized in that the sealing tool (1) and the counter tool (7) are designed as rotatable about one axis (12) rollers and that the sealing surfaces (2, 3, 6) on the outer circumference of relevant role are arranged. 11. Verfahren zum Siegeln von Folien (8, 9) aus Kunststoff untereinander oder von Folien (8, 9) mit Einschweissteilen (13), unter Verwendung einer Siegelvorrichtung, bestehend aus einem Siegelwerkzeug (1) und einem Gegenwerkzeug (7), wobei das Siegelwerkzeug (1) mindestens zwei Siegelflächen (2, 3, 6) aufweist, wobei die erste Siegelfläche (6) und die zweite Siegelfläche (2, 3) an unterschiedlichen Werkzeugteilen (5, 15) ausgebildet sind und wobei der Werkstoff des die erste Siegelfläche (6) tragenden Werkzeugteils (5) weicher ist als der Werkstoff des die zweite Siegelfläche (2, 3) tragenden Werkzeugteils (15), dadurch gekennzeichnet, dass das Siegelwerkzeug (1) und das Gegenwerkzeug (7) unter Zwischenlage zu siegelnder Folien (8, 9) so weit gegeneinander bewegt werden, dass der die erste Siegelfläche (6) tragende Werkzeugteil(5) unter Anlage an einer der Folien (8, 9) elastisch deformiert wird und die zweite Siegelfläche (2, 3) an der ihr zugewandten Folie anliegt.11. A method for sealing films (8, 9) made of plastic with each other or of films (8, 9) with Einschweissteilen (13), using a sealing device consisting of a sealing tool (1) and a counter tool (7), wherein the Sealing tool (1) has at least two sealing surfaces (2, 3, 6), wherein the first sealing surface (6) and the second sealing surface (2, 3) on different tool parts (5, 15) are formed and wherein the material of the first sealing surface (6) supporting tool part (5) is softer than the material of the second sealing surface (2, 3) supporting the tool part (15), characterized in that the sealing tool (1) and the counter tool (7) with interposition to be sealed films (8 , 9) are moved against each other so far that the tool part (5) carrying the first sealing surface (6) is elastically deformed under contact with one of the films (8, 9) and the second sealing surface (2, 3) on the film facing it is applied.
CH01134/09A 2009-07-20 2009-07-20 Sealing apparatus and method. CH701562B1 (en)

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US2767769A (en) * 1953-10-20 1956-10-23 Goodrich Co B F Heat-sealing thermoplastics
US2987107A (en) * 1959-02-27 1961-06-06 Amsco Packaging Machinery Inc Rotary heat-sealing apparatus
GB1294736A (en) * 1969-10-15 1972-11-01 Hesser Ag Maschf Device for continuously producing welding or sealed seams on thermoplastic wrapping films
US5015223A (en) * 1989-12-06 1991-05-14 Zip-Pak, Incorporated Hotseal jaws and cutoff knife assembly for processing thermoplastic film bag making material
WO1991007860A1 (en) * 1989-11-10 1991-05-30 Storland Plc Heat sealing
EP0538636A1 (en) * 1991-10-23 1993-04-28 Robert Bosch Gmbh Process and apparatus for welding packaging material
DE9402600U1 (en) * 1994-02-17 1994-08-04 Hamba-Maschinenfabrik Hans A.Müller GmbH & Co KG, 42275 Wuppertal Closing head for internally hot-melt adhesive lid foils on food containers
WO1996005046A1 (en) * 1994-08-10 1996-02-22 E.I. Du Pont De Nemours And Company Improved device for heat sealing film edges and methods relating thereto
GB2320909A (en) * 1996-09-13 1998-07-08 Lako Tool & Manufacturing Inc Crimper assembly for sealing overlapping portions of a sheet of packaging material
WO2009048714A1 (en) * 2007-10-11 2009-04-16 Illinois Tool Works Inc. Method of producing a hermetic reclosable package using seal bars with non-parallel geometry

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767769A (en) * 1953-10-20 1956-10-23 Goodrich Co B F Heat-sealing thermoplastics
US2987107A (en) * 1959-02-27 1961-06-06 Amsco Packaging Machinery Inc Rotary heat-sealing apparatus
GB1294736A (en) * 1969-10-15 1972-11-01 Hesser Ag Maschf Device for continuously producing welding or sealed seams on thermoplastic wrapping films
WO1991007860A1 (en) * 1989-11-10 1991-05-30 Storland Plc Heat sealing
US5015223A (en) * 1989-12-06 1991-05-14 Zip-Pak, Incorporated Hotseal jaws and cutoff knife assembly for processing thermoplastic film bag making material
EP0538636A1 (en) * 1991-10-23 1993-04-28 Robert Bosch Gmbh Process and apparatus for welding packaging material
DE9402600U1 (en) * 1994-02-17 1994-08-04 Hamba-Maschinenfabrik Hans A.Müller GmbH & Co KG, 42275 Wuppertal Closing head for internally hot-melt adhesive lid foils on food containers
WO1996005046A1 (en) * 1994-08-10 1996-02-22 E.I. Du Pont De Nemours And Company Improved device for heat sealing film edges and methods relating thereto
GB2320909A (en) * 1996-09-13 1998-07-08 Lako Tool & Manufacturing Inc Crimper assembly for sealing overlapping portions of a sheet of packaging material
WO2009048714A1 (en) * 2007-10-11 2009-04-16 Illinois Tool Works Inc. Method of producing a hermetic reclosable package using seal bars with non-parallel geometry

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