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WO2012110525A2 - Package comprising a thermoformed bag, method for producing the same and semifinished package - Google Patents

Package comprising a thermoformed bag, method for producing the same and semifinished package Download PDF

Info

Publication number
WO2012110525A2
WO2012110525A2 PCT/EP2012/052531 EP2012052531W WO2012110525A2 WO 2012110525 A2 WO2012110525 A2 WO 2012110525A2 EP 2012052531 W EP2012052531 W EP 2012052531W WO 2012110525 A2 WO2012110525 A2 WO 2012110525A2
Authority
WO
WIPO (PCT)
Prior art keywords
bag
front side
deep drawing
deep
rear side
Prior art date
Application number
PCT/EP2012/052531
Other languages
German (de)
French (fr)
Other versions
WO2012110525A3 (en
Inventor
Christian Fenn-Barrabass
Arnold Schneider
Manfred Marz
Original Assignee
Huhtamaki Ronsberg Zn Der Huhtamaki Deutschland Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huhtamaki Ronsberg Zn Der Huhtamaki Deutschland Gmbh & Co. Kg filed Critical Huhtamaki Ronsberg Zn Der Huhtamaki Deutschland Gmbh & Co. Kg
Publication of WO2012110525A2 publication Critical patent/WO2012110525A2/en
Publication of WO2012110525A3 publication Critical patent/WO2012110525A3/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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • B29C51/105—Twin sheet thermoforming, i.e. deforming two parallel opposing sheets or foils at the same time by using one common mould cavity and without welding them together during thermoforming
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81419—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled and flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—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
    • 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
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • 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
    • B29C66/70—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
    • B29C66/70—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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—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 structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—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 structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • B29C66/72341—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 structure of the material of the parts to be joined being multi-layered comprising a barrier layer for gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/851—Bag or container making machines
    • B29C66/8511—Bag making machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • 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
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B31B2160/102—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents obtained from essentially rectangular sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness

Definitions

  • the present invention relates to a method for producing a packaging bag having at least one front side of the bag and one backside of the bag of each flexible film material, comprising the steps of deep drawing the bag front, deep drawing the bag back, connecting the bag front side and the bag back.
  • the present invention further relates to a bag-holding device, as may be used in carrying out the above-mentioned method, namely of flexible sheet material having at least a front side of the bag and a back side of a bag, which are connected along a connecting surface with both the front side of the bag and the back of the bag are bulged with respect to the connecting surface to provide a later bag internal volume.
  • the bag front side and the bag back side are thermoformed separately from one another to be able to provide a packaging volume in the inner bag area after uniting of the front side of the bag and the back of the bag to a semi-finished bag between the bag front side and the bag back side.
  • the deep-drawing operations of the front side of the bag and the back of the bag must be precisely matched to be able to add the two sides of the bag exactly to form a bag.
  • the step of connecting the front side of the bag and the back of the bag to at least one semi-finished bag product is also subject to high accuracy requirements.
  • the accuracy requirements when connecting the front and back of the bag are not without to meet further, since the already deep-drawn sides of the bag have a three-dimensional shape with low wall thickness. The bag sides are thus difficult to handle with the required accuracy.
  • the bag front side and the bag back side are connected to each other during the deep drawing step.
  • a thermoforming tool exerts pressure on the two sides of the bag anyway for deep drawing, which can be used at a suitable location, such as the edge of the bag sides, for simultaneous connection of the bag sides.
  • the two sides of the bag are deflected with respect to their connecting surface to the same side, wherein usually the mutually facing surface inner regions of the two sides of the bag abut each other.
  • the semi-finished bag product obtained after the deep-drawing step comprises a bag-side composite bulged to only one side.
  • deep drawing is preferably referred to in the present application, a “troughs” in which is used with moderate deep drawing depths and relatively large transition radii between adjacent deep-drawn surfaces.
  • the method comprises, after deep drawing, a step of moving apart facing surface areas of the front of the bag and the back of the bag to form a bag volume.
  • the step of moving apart of inner surface areas comprises applying negative pressure to a surface outer region of a side of the bag front and bag back.
  • suction tools may be brought into engagement with surface outward areas from at least one side or even both sides of the bag front and back of the bag to then separate portions of the bag front and back of the bag to form a bag volume therebetween by applying vacuum and movement separating the two bags move.
  • the step of moving surface interior regions apart may include applying overpressure to at least one surface interior region of a front and back side of the bag, preferably on the inside surface of both the front of the bag and the back of the bag.
  • an open end of a pressurized fluid line in particular a compressed air line
  • a pressurized fluid line in particular a compressed air line
  • the pressurized fluid under pressure
  • a step of connecting comprising sections of flexible sheet material.
  • the flexible film material ensures with appropriate coating for a good connectivity formed from individual Folienmaterialflecken Beutelvorder- and bag backs.
  • the separation of face-to-face surface areas to form a bag volume can be easily achieved.
  • Both the front side of the bag and the back of the bag are preferably formed of flexible film material, which may preferably be a multilayer film laminate for providing defined properties.
  • An external layer can be a sealable thermoplastic layer.
  • the film laminate may comprise barrier layers, for example oxygen barrier layers and / or UV barrier layers.
  • oxygen barrier layers may be metal layers, in particular aluminum layers, or ethylene vinyl alcohol collagen.
  • the film laminate may have further layers with print job, layers with Abdecklack or other coating to protect the print job.
  • at least one plastic layer of the foil laminate is uniaxially stretched in order to give the pouch packaging formed therefrom a defined tear-open behavior.
  • Further layers of the plastic laminate can be formed from polyester, polyamide or polyols, for the reasons given above, preferably with monoaxial stretching.
  • the pouch front side and the pouch back side are preferably formed from the same foil material.
  • a particularly simple method for connecting sections of flexible material is to produce at least one sealed seam, ie the melting or softening of a thermoplastic outer layer of flexible film material and the joining of these melted or softened Folienmatenal Schemee under pressure.
  • a so-called "fin-seal” offers, in which the later inner surface areas of the formed of sheet material bag front side and the bag back are sealed together.
  • the sealing seam can be provided such that it initially encloses a desired inner area of the bag on two or three sides.
  • a particularly large prey volume can be achieved if the sealed seam is a marginal seal, ie if it contains the edge of the pouch.
  • By deep drawing surface portions of the bag package are distorted, in particular stretched. Due to the bag semi-finished product or packaging bag bulging in relation to the connecting surface along which the bag front side and the bag rear side are connected, subsequent printing of the semi-finished bag or packaging bag after the deep-drawing step is associated with great difficulties.
  • the application of necessary information to the outside of the packaging can be ensured in the inventive method by comprising the application of a distorted along at least one distortion axis printed image on at least one side of the bag front and bag back before deep drawing such that the printed image by deep drawing together with the elastic material carrying it along the distortion axis is equalized to an image having substantially uniform proportions in the extension surface of the flexible material carrying it.
  • the object of the present invention discussed at the outset is also solved by a bag semi-finished product of the type mentioned in the introduction, in which the bag front side and the bag back side are bulged with respect to the connecting surface to the same side.
  • the common buckling of the bag front and the bag back with respect to the bonding surface is the result of the above-described manufacturing method for manufacturing the bag.
  • the mutually facing free surface inner regions of the bag front side and the bag back at least partially, preferably completely, abut each other.
  • the connecting surface, along which the bag front side and the bag back side are connected have a three-dimensional shape and in particular may have curved and kinked areas, however, a substantially flat connecting surface for reasons of particularly simple manufacturability is preferred.
  • the semi-finished bag product can have a limited bag volume exclusively by way of three edge-sealing sections which enclose an angle with one another in pairs. Nevertheless, it should not be ruled out that the bag semi-finished product has a bottom section which is sealed between the front of the bag and the rear of the bag to form a later bag in a section between the front of the bag and the rear of the bag.
  • the semi-finished bag areas of undeformed, so not deep-drawn, flexible film material on the bag front side and / or the bag back has.
  • such an undeformed portion is provided in a longitudinal end region of the bag semi-finished product in order to be able to provide, for example, a tear-off section and / or the floor section described above, undisturbed and undeformed.
  • FIG. 1 is a perspective three-dimensional view of a schematic bag packaging, as it can be produced by the method according to the invention, optionally using the semi-finished bag according to the invention,
  • FIG. 2a shows an inventive embodiment of a bag semi-finished product in plan view
  • FIG. 2b shows the view of the bag semi-finished product of Fig. 2a in the direction B
  • FIG. 4 shows the bag semi-finished product of FIG. 3 immediately before the start of the deep-drawing step, FIG.
  • FIG. 6 shows the bag semi-finished product of FIG. 5 after a removal of surface areas of the sides of the bag facing one another and FIG. 6
  • Fig. 7 shows a finished bag after filling and sealing.
  • a bag packaging shown in perspective is generally designated 10.
  • the pouch packaging 10 comprises a pouch front side 12 and a pouch back side 14, each preferably made of flexible film material, which are connected to one another along a circumferential marginal seam 16.
  • the marginal seam 16 extends from the pouch packaging edge 18 to the dashed line to the inside.
  • the front side 12 of the bag and the rear side 14 of the bag are provided in a manner known per se with an outer layer (more precisely, a layer forming the innermost layer of the later bag package 10), which seals the front side of the bag 12 and the back of the bag 14 in the area of the marginal seam 16 softened or melted and joined together under pressure.
  • the surface inner regions of the pouch front 12 and the pouch back 14, not shown in FIG. 1 are not connected to one another, unlike in the region of the marginal seam 16, so that a pouch volume is provided here can be.
  • the flexible films of the bag front 12 and the bag back 14 have been thermoformed in a central region 24 such that both the bag front 12 and the bag back 14 are remote from the interface 22 in which the marginal seal 16 is located are bulging.
  • the pouch packaging 10 is essentially undeformed.
  • a notch 30 is provided in the region of the undeformed head-side longitudinal end 26 as a tear-in or tear-open aid for the pouch packaging 0.
  • the flexible film material of the bag front 12 and the bag back 14 is uniaxially stretched and arranged with the stretching direction parallel to the head-side edge sealing portion 16b so that tearing of the bag package 10 on the tear aid 30 leads to crack propagation through the stretching direction parallel to the head-side edge sealing portion 16b.
  • the bottom-side edge sealing portion 16c is preferably executed parallel to the head-side edge sealing portion 16b, although this need not necessarily be so.
  • the marginal seal portion 16a provided with the tear-open aid 30 is parallel to the longitudinal margin seal portion 16d which is free of tearing-in, which, however, does not necessarily have to be the case.
  • the flexible film material used to form the pouch packaging 10 may be multi-layered and may therefore comprise, in addition to the already described sealing layer on the inside of the pouch, further plastic layers, for example oriented polyamide, oriented polypropylene, polyethylene trepphthalate and the like.
  • a barrier layer with oxygen barrier properties may be provided, such as a metal layer, in particular an aluminum layer, or a layer of ethylene vinyl alcohol.
  • a bag blank 40 is roughly illustrated, from which the later bag 10 of FIG. 1 may arise.
  • the front side of the bag and the rear side of the bag are preferably in the form of substantially flat, rectangular film material patches, which are connected to one another via the previously described edge sealing sections 16a, 16c and 16d.
  • the head-side edge-sealing portion 16b will be realized only at a later time to allow filling of the bag package. Furthermore, the front side of the bag 12 has a printing 42, which is distorted starting from a central area to the edge sealing portions 16a and 16b, more precisely: compressed.
  • the distortion axes along which the packaging blank 40 is stretch-formed in the subsequent deep-drawing step are substantially orthogonal to the respective wrapping edges in the region of their respective longitudinal center.
  • the distortion axes are indicated by vi to v4 in Fig. 2a.
  • an elongation of the material along a distortion mixing axis which results from a combination of the respective corner closest distortion axes.
  • FIG. 3 shows a deep-drawing tool 44 cut in a sectional plane parallel to the mold-closing direction of the deep-drawing tool 44.
  • the deep-drawing mold 44 comprises a mold top part 46 with a frame part 48 and a deep-drawing die 50 movably received on it along the mold closing direction F.
  • the thermoforming mold 44 further comprises a mold bottom 52 having a cavity 54 provided therein, which is formed substantially complementary to the punch effective surface 56.
  • the thickness of the preferably uniform film material for the bag front 12 and the bag back 14 is substantially negligible compared to the dimensions of the bag blank 40 or the later bag package 10 orthogonal to the thickness direction.
  • the mold cavity 54 has the shape of a negative truncated pyramid with a substantially rectangular base.
  • the active surface 56 of the deep-drawing die 50 has the shape of a truncated pyramid.
  • the corners shown between adjacent surface areas are only schematic. In fact, adjacent deep-drawn areas are preferably connected to each other via relatively large transition radii, which are particularly preferably several millimeters.
  • FIG. 3 extends essentially through the bag blank 40 in the region of the lettering 42 shown in FIG. 2 a.
  • the bag blank 40 rests on corresponding support edges of the mold base 52 surrounding the mold cavity 54.
  • the edge seal portion 16c located in front of the drawing plane of FIG. 3 also rests on a support portion of the mold base 52. The same applies to the still unsealed head portion 26 of the bag blank 40th
  • the upper mold part 46 is lowered so far in the mold closing direction F to the lower mold part 52 that an outer edge region of the bag blank 40 is clamped and fixed between the frame 48 of the upper mold part 46 and the lower mold part 52.
  • edge-sealing sections 6a, 16c and 16d should not have been produced in an alternative solution of the method presented here by way of example when inserting the bag front 12 and the bag back 14, said edge-sealing sections can also be produced by the frame 48 and the mold bottom 52, for example in the frame 48 and / or in the lower mold part 52 corresponding heating devices are provided for heating the edge portion of the bag blank 40 clamping tool section.
  • the deep-drawing die 50 in FIG. 4 touches the side of the bag facing it, here: the front side of the bag 12.
  • FIG. 6 shows how the deep-drawing die 50 has been moved relative to the frame 48 counter to the mold closing direction F in order to move the mutually facing surface inner regions 58 of the bag front 12 and 60 of the bag back 14 away from each other.
  • vacuum channels may be provided in the deep-drawing die 50 and in the lower mold part 52 (not shown in FIG. 6), which may open in the surface 52 of the active surface 56 of the deep-drawing die 50 closest to the lower mold part 52 and in the cavity 54 of the lower mold part 52 Bag front side 12 and the bag rear 14 to grip with negative pressure and to remove by relative movement of thermoforming punch 50 and mold base 52 from each other to make a bag volume 62 for filling the bag available.
  • connection surface 22 oriented orthogonally to the plane of the drawing of FIG. 6 can be seen.
  • Fig. 7 the finished filled and fully sealed bag 10 is shown.
  • the lettering 42 Due to the elongation that occurred during the deep-drawing process, the lettering 42 is rectified. Since the compressed representation of the originally applied lettering 42 of the flat bag blank 40 is matched to the strain occurring during the deep-drawing process, the lettering 42 on the finished bag packaging 10 appears undistorted. Notwithstanding the simple embodiment of a four-edge sealed bag shown here, the bag package 10 can also be designed as a stand-up pouch, then, for example, a bottom can be sealed at the ground-level longitudinal end 28.
  • Fig. 7 it can be seen that the originally upwardly open bag blank 40 has received its final marginal sealing portion 16b, which completely closes the bag package 10.
  • the tear-open aid 30 is provided in such a way that a tear can be introduced with it directly underneath the edge-rail portion 16b and the bag-type packaging 10 can thereby be opened.

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Abstract

A method for producing a packaging bag (10) having at least a bag front side (12) and a bag rear side (14), each of flexible sheet material, comprises the following steps: thermoforming the bag front side (12), thermoforming the bag rear side (14), joining the bag front side (12) and the bag rear side (14), wherein the thermoforming of the bag front side (12) and of the bag rear side (14) is performed in a joint thermoforming step on sides already joined together: bag front side (12) and bag rear side (14), or during a step of joining the bag front side (12) and the bag rear side (14).

Description

Verpackung aus tiefgezogenem Beutel, Verfahren zur Herstellung derselben und Verpackung Halbzeug  Thermoformed bag packaging, process for making same and packaging semi-finished product
Beschreibung description
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Verpackungsbeutels mit wenigstens einer Beutelvorderseite und einer Beutelrückseite aus jeweils flexiblem Folienmaterial, welches folgende Schritte umfasst: Tiefziehen der Beutelvorderseite, Tiefziehen der Beutelrückseite, Verbinden von Beutelvorderseite und Beutelrückseite. Die vorliegende Erfindung betrifft weiter ein Beutelhaltezeug, wie es bei der Durchführung des oben genannten Verfahrens verwendet werden kann, nämlich aus flexiblem Folienmaterial mit wenigstens einer Beutelvorderseite und einer Beutelrückseite, welche längs einer Verbindungsfläche mit einander verbunden sind, wobei sowohl die Beutelvorderseite als auch die Beutelrückseite bezüglich der Verbindungsfläche zur Bereitstellung eines späteren Beutelinnenvolumens ausgebeult sind. The present invention relates to a method for producing a packaging bag having at least one front side of the bag and one backside of the bag of each flexible film material, comprising the steps of deep drawing the bag front, deep drawing the bag back, connecting the bag front side and the bag back. The present invention further relates to a bag-holding device, as may be used in carrying out the above-mentioned method, namely of flexible sheet material having at least a front side of the bag and a back side of a bag, which are connected along a connecting surface with both the front side of the bag and the back of the bag are bulged with respect to the connecting surface to provide a later bag internal volume.
Bei herkömmlichen Verfahren zur Herstellung eines Verpackungsbeutels, wie sie derzeit im Stand der Technik ausgeführt werden, werden Beutelvorderseite und Beutelrückseite getrennt voneinander tiefgezogen, um nach der Vereinigung von Beutelvorderseite und Beutelrückseite zu einem Beutelhalbzeug zwischen Beutelvorderseite und Beutelrückseite ein Verpackungsvolumen im Beutelinnenbereich bereitstellen zu können. In conventional methods for producing a packaging bag, as currently carried out in the prior art, the bag front side and the bag back side are thermoformed separately from one another to be able to provide a packaging volume in the inner bag area after uniting of the front side of the bag and the back of the bag to a semi-finished bag between the bag front side and the bag back side.
Dieses Verfahren weist Nachteile auf: Zum einen müssen die Tiefziehvorgänge von Beutelvorderseite und Beutelrückseite genau aufeinander abgestimmt sein, um die beiden Beutelseiten exakt zu einem Beutel fügen zu können. Darüber hinaus ist auch der Schritt des Verbindens von Beutelvorderseite und Beutelrückseite zu wenigstens einem Beutelhalbzeug mit hohen Genauigkeitsanforderungen belastet. Überdies sind die Genauigkeitsanforderungen beim Verbinden von Beutelvorder- und Beutelrückseite nicht ohne weiteres zu erfüllen, da die bereits tiefgezogenen Beutelseiten eine dreidimensionale Gestalt bei geringer Wandstärke aufweisen. Die Beutelseiten sind somit nur mit Schwierigkeiten mit der erforderlichen Genauigkeit handhabbar. On the one hand, the deep-drawing operations of the front side of the bag and the back of the bag must be precisely matched to be able to add the two sides of the bag exactly to form a bag. In addition, the step of connecting the front side of the bag and the back of the bag to at least one semi-finished bag product is also subject to high accuracy requirements. Moreover, the accuracy requirements when connecting the front and back of the bag are not without To meet further, since the already deep-drawn sides of the bag have a three-dimensional shape with low wall thickness. The bag sides are thus difficult to handle with the required accuracy.
Es ist daher Aufgabe der vorliegenden Erfindung, das gattungsgemäße Verfahren zur Vermeidung bzw. Abschwächung der oben genannten Nachteile zu verbessern. It is therefore an object of the present invention to improve the generic method for avoiding or mitigating the above-mentioned disadvantages.
Diese Aufgabe wird erfindungsgemäß bei einem gattungsgemäßen Verfahren dadurch gelöst, dass das Tiefziehen der Beutelvorderseite und der Beutelrückseite in einem gemeinsamen Tiefziehschritt an bereits mit einander verbundenen Seiten: Beutelvorderseite und Beutelrückseite, oder während eines Schrittes einer Verbindung von Beutelvorderseite und Beutelrückseite ausgeführt wird. This object is achieved in a generic method in that the thermoforming of the bag front side and the bag back in a common deep drawing step on already connected sides: bag front and back of the bag, or during a step of connecting the bag front and back of the bag is performed.
Dadurch, dass Beutelvorderseite und Beutelrückseite gemeinsam tiefgezogen werden, entfällt eine exakte Abstimmung der gemäß dem Stand der Technik getrennten Tiefziehschritte miteinander. As a result of the fact that the front side of the bag and the back of the bag are deep-drawn together, an exact coordination of the deep-drawing steps separated according to the prior art is eliminated.
Dann, wenn Beutelvorderseite und Beutelrückseite vor dem Tiefziehschritt bereits miteinander verbunden sind, sind die Beuteivorderseite und Beutelrückseite bereits definiert zueinander ausgerichtet, wobei diese Ausrichtung durch den Tiefziehschritt nicht mehr gestört werden kann. Then, when the bag front side and the bag back side are already connected to each other before the deep drawing step, the prey rear side and the rear side of the bag are already aligned with each other, this alignment can not be disturbed by the deep drawing step.
Gleiches gilt für den Fall, dass die Beutelvorderseite und die Beutelrückseite während des Tiefziehschritts miteinander verbunden werden. Dies ist möglich, da zum Tiefziehen ohnehin ein Tiefziehwerkzeug Druck auf die beiden Beutelseiten ausübt, welcher an geeigneter Stelle, etwa dem Rand der Beutelseiten, auch zum gleichzeitigen Verbinden der Beutelseiten miteinander genutzt werden kann. Nach dem gemeinsamen Tiefziehschritt sind die beiden Beutelseiten bezüglich ihrer Verbindungsfläche zur selben Seite hin ausgelenkt, wobei üblicherweise die aufeinander zu weisenden Oberflächeninnenbereiche der beiden Beutelseiten aneinander anliegen. Mit anderen Worten: Das nach dem Tiefziehschritt erhaltene Beutelhalbzeug umfasst einen zu lediglich einer Seite hin ausgebeulten Beutelseitenverbund. The same applies to the case that the bag front side and the bag back side are connected to each other during the deep drawing step. This is possible because a thermoforming tool exerts pressure on the two sides of the bag anyway for deep drawing, which can be used at a suitable location, such as the edge of the bag sides, for simultaneous connection of the bag sides. After the common deep drawing step, the two sides of the bag are deflected with respect to their connecting surface to the same side, wherein usually the mutually facing surface inner regions of the two sides of the bag abut each other. In other words, the semi-finished bag product obtained after the deep-drawing step comprises a bag-side composite bulged to only one side.
Mit„Tiefziehen" ist in der vorliegenden Anmeldung bevorzugt ein„Mulden" bezeichnet, bei welchem mit moderaten Tiefziehtiefen und verhältnismäßig großen Übergangsradien zwischen benachbarten tiefgezogenen Flächen gearbeitet wird. By "deep drawing" is preferably referred to in the present application, a "troughs" in which is used with moderate deep drawing depths and relatively large transition radii between adjacent deep-drawn surfaces.
Um ein gewünschtes Beutelvolumen zwischen den aufeinander zu weisenden Oberflächeninnenbereichen bereitstellen zu können, ist es jedoch vorteilhaft, wenn die Beutelvorderseite und die Beutelrückseite zu unterschiedlichen Seiten bezogen auf ihre Verbindungsfläche vorstehen. Um dies zu erreichen, kann vorgesehen sein, dass das Verfahren nach dem Tiefziehen einen Schritt eines Auseinanderbewegens von aufeinander zu weisenden Oberflächeninnenbereichen der Beutelvorderseite und der Beutelrückseite zur Bildung eines Beutelvolumens umfasst. However, in order to be able to provide a desired bag volume between the facing inner surface portions, it is preferable that the bag front side and the bag back side project to different sides with respect to their joining surface. To achieve this, it may be provided that the method comprises, after deep drawing, a step of moving apart facing surface areas of the front of the bag and the back of the bag to form a bag volume.
Dies kann in einer konstruktiven Ausgestaltung des Verfahrens dadurch erfolgen, dass der Schritt des Auseinanderbewegens von Oberflächeninnenbereichen ein Anlegen von Unterdruck an einen Oberflächenaußenbereich einer Seite aus Beutelvorderseite und Beutelrückseite umfasst. Beispielsweise können Saugwerkzeuge mit Oberflächenaußenbereichen von wenigstens einer Seite oder sogar von beiden Seiten aus Beutelvorderseite und Beutelrückseite in Wirkungseingriff gebracht werden, um dann durch Anlegen von Unterdruck und einer die beiden Beuteiseiten trennenden Bewegung Abschnitte der Beutelvorderseite und Beutelrückseite unter Bildung eines Beutelvolumens zwischen diesen voneinander weg zu bewegen. Zusätzlich oder alternativ kann der Schritt des Auseinanderbewegens von Oberflächeninnenbereichen ein Anlegen von Überdruck an wenigstens einen Oberflächeninnenbereich einer Seite aus Beutelvorderseite und Beutelrückseite, vorzugsweise an den Oberflächeninnenbereich sowohl der Beutelvorderseite als auch der Beutelrückseite umfassen. Beispielsweise kann ein offenes Ende einer Druckfluidleitung, insbesondere Druckluftleitung, zwischen die aufeinander zu weisenden Oberflächeninnenbereiche der Beutelseiten eingefahren werden, woraufhin man unter, bezogen auf den Umgebungsdruck, unter Überdruck stehendes Druckfiuid in den Raum zwischen Beutelvorderseite und Beutelrückseite einleitet. Dadurch werden bei entsprechender Beweglichkeit von Beutelvorderseite und Beutelrückseite diese abschnittsweise voneinander weg bewegt, so dass es wieder zur Bildung eines Beutelvolumens zwischen den aufeinander zu weisenden Oberflächeninnenbereichen der Beutelvorderseite und der Beutelrückseite kommt. This can be done in a constructive embodiment of the method in that the step of moving apart of inner surface areas comprises applying negative pressure to a surface outer region of a side of the bag front and bag back. For example, suction tools may be brought into engagement with surface outward areas from at least one side or even both sides of the bag front and back of the bag to then separate portions of the bag front and back of the bag to form a bag volume therebetween by applying vacuum and movement separating the two bags move. Additionally or alternatively, the step of moving surface interior regions apart may include applying overpressure to at least one surface interior region of a front and back side of the bag, preferably on the inside surface of both the front of the bag and the back of the bag. For example, an open end of a pressurized fluid line, in particular a compressed air line, can be retracted between the mutually facing surface inner areas of the bag sides, whereupon the pressurized fluid, under pressure, is introduced into the space between the front of the bag and the back of the bag. As a result, with appropriate mobility of the front side of the bag and the rear side of the bag, the latter are moved away from each other in sections, so that again a bag volume is formed between the mutually facing inner surface areas of the front side of the bag and the rear side of the bag.
Um sicherzugehen, dass die Beutelvorderseite und die Beutelrückseite einfach und sicher miteinander verbunden werden können und um darüber hinaus die notwendige Beweglichkeit zur Bildung eines Beutelvolumens nach dem Tiefziehvorgang gewährleisten zu können, kann weiter vorgesehen sein, dass es vor oder während des Tiefziehens einen Schritt eines Verbindens von Abschnitten aus flexiblem Folienmaterial umfasst. Gerade das flexible Folienmaterial sorgt bei entsprechender Beschichtung für eine gute Verbindbarkeit von aus einzelnen Folienmaterialflecken gebildeten Beutelvorder- und Beutelrückseiten. Darüber hinaus kann die Trennung von aufeinander zu weisenden Oberflächeninnenbereichen zur Bildung eines Beutelvolumens einfach erreicht werden. To ensure that the front of the bag and the back of the bag can be easily and securely connected to each other and also to ensure the necessary mobility to form a bag volume after the deep-drawing process can be further provided that before or during the deep drawing a step of connecting comprising sections of flexible sheet material. Especially the flexible film material ensures with appropriate coating for a good connectivity formed from individual Folienmaterialflecken Beutelvorder- and bag backs. In addition, the separation of face-to-face surface areas to form a bag volume can be easily achieved.
Sowohl die Beutelvorderseite wie auch die Beutelrückseite ist vorzugsweise aus flexiblem Folienmaterial gebildet, welches zur Bereitstellung definierter Eigenschaften bevorzugt ein Folienlaminat mit mehreren Lagen sein kann. Eine außen liegende Lage kann dabei eine siegelfähige Thermoplastlage sein. Weiter kann das Folienlaminat Barrierelagen umfassen, etwa Sauer- stoffbarrierelagen oder/und UV-Barrierelagen. Bekannte Sauerstoffbarriere- lagen können Metalllagen, insbesondere Aluminiumlagen, oder Ethylenvinyl- alkohollagen sein. Both the front side of the bag and the back of the bag are preferably formed of flexible film material, which may preferably be a multilayer film laminate for providing defined properties. An external layer can be a sealable thermoplastic layer. Furthermore, the film laminate may comprise barrier layers, for example oxygen barrier layers and / or UV barrier layers. Known oxygen barrier layers may be metal layers, in particular aluminum layers, or ethylene vinyl alcohol collagen.
Das Folienlaminat kann weiter Lagen mit Druckauftrag, Lagen mit Abdecklack oder einem sonstigen Überzug zum Schutze des Druckauftrags aufweisen. Vorzugsweise ist wenigstens eine Kunststoff läge des Folienlaminats unaxial gereckt, um der daraus gebildeten Beutelverpackung ein definiertes Aufreißverhalten zu verleihen. Weitere Lagen des Kunststofflaminats können aus Polyester, Polyamid oder Polyo!efinen gebildet sein, aus den oben genannten Gründen vorzugsweise mit monoaxialer Reckung. The film laminate may have further layers with print job, layers with Abdecklack or other coating to protect the print job. Preferably, at least one plastic layer of the foil laminate is uniaxially stretched in order to give the pouch packaging formed therefrom a defined tear-open behavior. Further layers of the plastic laminate can be formed from polyester, polyamide or polyols, for the reasons given above, preferably with monoaxial stretching.
Aus Gründen einer einfachen Herstellbarkeit der gewünschten Beutelverpackung sind die Beutelvorderseite und die Beutelrückseite vorzugsweise aus demselben Folienmaterial gebildet. For reasons of ease of manufacture of the desired pouch packaging, the pouch front side and the pouch back side are preferably formed from the same foil material.
Ein besonders einfaches Verfahren zur Verbindung von Abschnitten aus flexiblem Material liegt in der Herstellung wenigstens einer Siegelnaht, also dem Aufschmelzen oder Erweichen einer thermoplastischen Außenlage von flexiblem Folienmaterial und dem Verbinden dieser aufgeschmolzenen oder erweichten Folienmatenalbereiche unter Druck. Besonders einfach, aber für Beutelverpackungen ausreichend, bietet sich die Herstellung einer so genannten„Fin-Siegelnaht" an, bei welcher die späteren Innenflächenbereiche der aus Folienmaterial gebildeten Beutelvorderseite und der Beutelrückseite miteinander gesiegelt werden. A particularly simple method for connecting sections of flexible material is to produce at least one sealed seam, ie the melting or softening of a thermoplastic outer layer of flexible film material and the joining of these melted or softened Folienmatenalbereiche under pressure. Particularly simple, but sufficient for bag packaging, the production of a so-called "fin-seal" offers, in which the later inner surface areas of the formed of sheet material bag front side and the bag back are sealed together.
Bei dem Verbinden von Abschnitten aus flexiblem Material kann die Siegelnaht derart vorgesehen werden, dass sie einen gewünschten Beutelinnenbereich zunächst an zwei oder an drei Seiten einfasst. Somit verbleibt immer noch ein ungesiegelter bzw. unverbundener Bereich, durch welchen ein so gebildeter Beutelrohling vor seinem endgültigen Verschließen befüllt werden kann. Ein besonders großes Beuteivolumen kann dann erreicht werden, wenn die Siegelnaht eine Randsiegelnaht ist, d. h. wenn sie den Rand des Beutels enthält. Durch das Tiefziehen werden Flächenabschnitte der Beutelverpackung verzerrt, insbesondere gedehnt. Aufgrund des gegenüber der Verbindungsfläche, längs welcher die Beutelvorderseite und die Beutelrückseite miteinander verbunden sind, ausgebeulten Beutelhalbzeugs oder Verpackungsbeutels, ist ein nachträgliches Bedrucken des Beutelhalbzeugs bzw. des Verpackungsbeutels nach dem Tiefziehschritt mit großen Schwierigkeiten verbunden. Allerdings ist es üblich, auf Verpackungen wenigstens Angaben über den Inhalt derselben anzugeben, insbesondere dann, wenn die Beutelvorderseite und die Beutelrückseite blickdicht sind und die verpackte Ware nicht ohne weiteres von außen ohne Öffnen der Verpackung erkennbar ist. When connecting sections of flexible material, the sealing seam can be provided such that it initially encloses a desired inner area of the bag on two or three sides. Thus, there still remains an unsealed or unconnected area through which a so-formed bag blank can be filled prior to its final closure. A particularly large prey volume can be achieved if the sealed seam is a marginal seal, ie if it contains the edge of the pouch. By deep drawing surface portions of the bag package are distorted, in particular stretched. Due to the bag semi-finished product or packaging bag bulging in relation to the connecting surface along which the bag front side and the bag rear side are connected, subsequent printing of the semi-finished bag or packaging bag after the deep-drawing step is associated with great difficulties. However, it is customary to state on packaging at least information about the content of the same, especially if the front side of the bag and the back of the bag are opaque and the packaged goods can not be readily seen from the outside without opening the package.
Das Aufbringen von notwendigen Informationen auf die Verpackungsaußenseite kann bei dem erfindungsgemäßen Verfahren dadurch sichergestellt werden, dass es vor dem Tiefziehen das Aufbringen eines längs wenigstens einer Verzerrungsachse verzerrten Druckbildes auf wenigstens eine Seite aus Beutelvorderseite und Beutelrückseite derart umfasst, dass das Druckbild durch das Tiefziehen zusammen mit dem es tragenden flexiblen Material längs der Verzerrungsachse zu einem Bild mit im Wesentlichen gleichmäßigen Proportionen in der Erstreckungsfläche des es tragenden flexiblen Materials entzerrt wird. The application of necessary information to the outside of the packaging can be ensured in the inventive method by comprising the application of a distorted along at least one distortion axis printed image on at least one side of the bag front and bag back before deep drawing such that the printed image by deep drawing together with the elastic material carrying it along the distortion axis is equalized to an image having substantially uniform proportions in the extension surface of the flexible material carrying it.
Weiter wird die eingangs diskutierte Aufgabe der vorliegenden Erfindung auch gelöst durch ein Beutelhalbzeug der eingangs genannten Art, bei welchem die Beutelvorderseite und die Beutelrückseite bezüglich der Verbindungsfläche zur selben Seite ausgebeult sind. Furthermore, the object of the present invention discussed at the outset is also solved by a bag semi-finished product of the type mentioned in the introduction, in which the bag front side and the bag back side are bulged with respect to the connecting surface to the same side.
Die gemeinsame Ausbeulrichtung von Beutelvorderseite und Beutelrückseite bezüglich der Verbindungsfläche ist Resultat des oben beschriebenen Herstellungsverfahrens zur Herstellung des Beutels. The common buckling of the bag front and the bag back with respect to the bonding surface is the result of the above-described manufacturing method for manufacturing the bag.
Um sicherzustellen, dass das Beutelhalbzeug nur minimalen Stauraum benötigt und somit effektiv transportiert und gelagert werden kann, kann vorge- sehen sein, dass die aufeinander zu weisenden freien Oberflächeninnenbe- reiche der Beutelvorderseite und der Beutelrückseite wenigstens abschnittsweise, vorzugsweise vollständig, aneinander anliegen. To ensure that the semi-finished bag product requires only minimal storage space and can thus be transported and stored effectively, it is possible to provide can be seen that the mutually facing free surface inner regions of the bag front side and the bag back at least partially, preferably completely, abut each other.
Zwar soll nicht ausgeschlossen sein, dass die Verbindungsfläche, längs welcher die Beutelvorderseite und die Beutelrückseite miteinander verbunden sind, eine dreidimensionale Gestalt aufweisen und insbesondere gekrümmte und geknickte Bereiche aufweisen kann, so ist jedoch eine im Wesentlichen ebene Verbindungsfläche aus Gründen der besonders einfachen Herstellbarkeit bevorzugt. Although it should not be ruled out that the connecting surface, along which the bag front side and the bag back side are connected, have a three-dimensional shape and in particular may have curved and kinked areas, however, a substantially flat connecting surface for reasons of particularly simple manufacturability is preferred.
Weiter kann das Beutelhalbzeug ein ausschließlich durch drei paarweise miteinander einen Winkel einschließende Randsiegelabschnitte begrenztes Beutelvolumen aufweisen. Dennoch soll nicht ausgeschlossen sein, dass das Beutelhalbzeug zur Bildung eines späteren Standbeutels in einem Abschnitt zwischen der Beutelvorderseite und der Beutelrückseite einen Bodenabschnitt aufweist, welcher zwischen Beutelvorderseite und Beutelrückseite eingesiegelt ist. Furthermore, the semi-finished bag product can have a limited bag volume exclusively by way of three edge-sealing sections which enclose an angle with one another in pairs. Nevertheless, it should not be ruled out that the bag semi-finished product has a bottom section which is sealed between the front of the bag and the rear of the bag to form a later bag in a section between the front of the bag and the rear of the bag.
Unabhängig vom Vorhandensein eines Bodenabschnitts kann es vorteilhaft sein, wenn das Beutelhalbzeug Bereiche aus unverformtem, also nicht tiefgezogenem, flexiblen Folienmaterial an der Beutelvorderseite oder/und der Beutelrückseite aufweist. Vorzugsweise ist ein derartiger unverformter Abschnitt in einem Längsendebereich des Beutelhalbzeugs vorgesehen, um beispielsweise einen Aufreißabschnitt oder/und den oben beschriebenen Bodenabschnitt, ungestört und unverformt bereitstellen zu können. Regardless of the presence of a bottom portion, it may be advantageous if the semi-finished bag areas of undeformed, so not deep-drawn, flexible film material on the bag front side and / or the bag back has. Preferably, such an undeformed portion is provided in a longitudinal end region of the bag semi-finished product in order to be able to provide, for example, a tear-off section and / or the floor section described above, undisturbed and undeformed.
Die vorliegende Erfindung wird nachfolgend anhand der beiliegenden Figuren dargestellt. Es stellt dar: Fig. 1 eine perspektivische dreidimensionale Darstellung einer schematisierten Beutelverpackung, wie sie mit dem erfindungsgemäßen Verfahren, ggf. unter Verwendung des erfindungsgemäßen Beutelhalbzeugs, herstellbar ist, The present invention will now be described with reference to the accompanying figures. It shows: 1 is a perspective three-dimensional view of a schematic bag packaging, as it can be produced by the method according to the invention, optionally using the semi-finished bag according to the invention,
Fig. 2a eine erfindungsgemäße Ausführungsform eines Beutelhalbzeugs in der Draufsicht, 2a shows an inventive embodiment of a bag semi-finished product in plan view,
Fig. 2b die Ansicht des Beutelhalbzeugs von Fig. 2a in Blickrichtung B, 2b shows the view of the bag semi-finished product of Fig. 2a in the direction B,
Fig. 3 das Beutelhalbzeug der Fig. 2a und 2b vor einem Tiefziehvorgang, in ein Tiefziehwerkzeug eingelegt, 3, the semi-finished bag of Fig. 2a and 2b before a deep-drawing process, inserted into a thermoforming tool,
Fig. 4 das Beutelhalbzeug von Fig. 3 unmittelbar vor Beginn des Tiefziehschrittes, 4 shows the bag semi-finished product of FIG. 3 immediately before the start of the deep-drawing step, FIG.
Fig. 5 das Beutelhalbzeug von Fig. 4 nach Absenken des Tiefziehstempels in eine Tiefziehform, 5 after lowering the thermoforming stamp into a thermoforming mold,
Fig. 6 das Beutelhalbzeug von Fig. 5 nach einem Entfernen von aufeinander zu weisenden Oberflächeninnenbereichen der Beutelseiten und FIG. 6 shows the bag semi-finished product of FIG. 5 after a removal of surface areas of the sides of the bag facing one another and FIG
Fig. 7 einen fertigen Beutel nach Befüllung und Versiegelung. Fig. 7 shows a finished bag after filling and sealing.
In Fig. 1 ist eine perspektivisch dargestellte Beutelverpackung allgemein mit 10 bezeichnet. In Fig. 1, a bag packaging shown in perspective is generally designated 10.
Die Beutelverpackung 10 umfasst eine Beutelvorderseite 12 und eine Beutelrückseite 14, jeweils vorzugsweise aus flexiblem Folienmaterial, welche längs einer umlaufenden Randsiegelnaht 16 miteinander verbunden sind. Die Randsiegelnaht 16 erstreckt sich dabei vom Beutelverpackungsrand 18 bis zu der gestrichelten Linie nach Innen. Zur Herstellung dieser Siegelverbindung sind die Beutelvorderseite 12 und die Beutelrückseite 14 in an sich bekannter Weise mit einer außen liegenden (genauer: einer die innerste Lage der späteren Beutelverpackung 10 bildenden) Siegelschicht versehen, welche beim Verbinden von Beutelvorderseite 12 und Beutelrückseite 14 im Bereich der Randsiegelnaht 16 erweicht oder aufgeschmolzen und unter Druck miteinander verbunden werden. In dem von der Randsiegelnaht 16 umschlossenen Innenbereich 20 der Beutelverpackung 10 sind die in Fig. 1 nicht dargestellten aufeinander zu weisenden Oberflächeninnenbereiche der Beutelvorderseite 12 und der Beutelrückseite 14, anders als im Bereich der Randsiegelnaht 16, nicht miteinander verbunden, so dass hier ein Beutelvolumen bereitgestellt werden kann. The pouch packaging 10 comprises a pouch front side 12 and a pouch back side 14, each preferably made of flexible film material, which are connected to one another along a circumferential marginal seam 16. The marginal seam 16 extends from the pouch packaging edge 18 to the dashed line to the inside. To produce this sealing connection, the front side 12 of the bag and the rear side 14 of the bag are provided in a manner known per se with an outer layer (more precisely, a layer forming the innermost layer of the later bag package 10), which seals the front side of the bag 12 and the back of the bag 14 in the area of the marginal seam 16 softened or melted and joined together under pressure. In the inner region 20 of the pouch packaging 10 enclosed by the marginal seal 16, the surface inner regions of the pouch front 12 and the pouch back 14, not shown in FIG. 1, are not connected to one another, unlike in the region of the marginal seam 16, so that a pouch volume is provided here can be.
Zur Bereitstellung des Beutelvolumens wurden die flexiblen Folien der Beutelvorderseite 12 und der Beutelrückseite 14 in einem mittleren Bereich 24 einem Tiefziehvorgang unterzogen, so dass sowohl die Beutelvorderseite 12 wie auch die Beutelrückseite 14 bezüglich der Verbindungsfläche 22, in welcher die Randsiegelnaht 16 liegt, von dieser weg ausgebeult sind. To provide the bag volume, the flexible films of the bag front 12 and the bag back 14 have been thermoformed in a central region 24 such that both the bag front 12 and the bag back 14 are remote from the interface 22 in which the marginal seal 16 is located are bulging.
Im Bereich der Randsiegelnaht 16 sowie im Bereich des kopfseitigen Längsendes 26 und des bodenseitigen Längsendes 28 ist die Beutelverpackung 10 im Wesentlichen unverformt. In the area of the edge seam 16 and in the region of the head-side longitudinal end 26 and the bottom-side longitudinal end 28, the pouch packaging 10 is essentially undeformed.
Im längsseitigen Randsiegelabschnitt 16a ist im Bereich des unverformten kopfseitigen Längsendes 26 eine Kerbe 30 als Ein- bzw. Aufreißhilfe der Beutelverpackung 0 vorgesehen. In the longitudinal edge sealing portion 16a, a notch 30 is provided in the region of the undeformed head-side longitudinal end 26 as a tear-in or tear-open aid for the pouch packaging 0.
Vorzugsweise ist das flexible Folienmaterial der Beutelvorderseite 12 und der Beutelrückseite 14 uniaxial gereckt und mit der Reckrichtung parallel zum kopfseitigen Randsiegelabschnitt 16b angeordnet, so dass ein Einreißen der Beutelverpackung 10 an der Einreißhilfe 30 zu einer durch die Reckrichtung geführten Rissausbreitung parallel zum kopfseitigen Randsiegelabschnitt 16b führt. Der bodenseitige Randsiegelabschnitt 16c ist vorzugsweise parallel zum kopfseitigen Randsiegelabschnitt 16b ausgeführt, wenngleich dies nicht zwingend so sein muss. Preferably, the flexible film material of the bag front 12 and the bag back 14 is uniaxially stretched and arranged with the stretching direction parallel to the head-side edge sealing portion 16b so that tearing of the bag package 10 on the tear aid 30 leads to crack propagation through the stretching direction parallel to the head-side edge sealing portion 16b. The bottom-side edge sealing portion 16c is preferably executed parallel to the head-side edge sealing portion 16b, although this need not necessarily be so.
Ebenso ist der mit der Einreißhilfe 30 versehene Randsiegelnahtabschnitt 16a in dem dargestellten Beispiel parallel zu dem einreißhilfefreien Längs- randsiegelabschnitt 16d parallel, was jedoch wiederum nicht zwingend der Fall sein muss. Likewise, in the example shown, the marginal seal portion 16a provided with the tear-open aid 30 is parallel to the longitudinal margin seal portion 16d which is free of tearing-in, which, however, does not necessarily have to be the case.
Das zur Bildung der Beutelverpackung 10 verwendete flexible Folienmaterial kann mehrlagig sein und kann daher neben der bereits beschriebenen Siegellage auf der Beutelinnenseite weitere Kunststofflagen umfassen, beispielsweise aus orientiertem Polyamid, orientiertem Polypropylen, Polyethy- lentrephtalat und dergleichen. Weiter kann zur vorteilhaften Verpackung von Lebensmitteln in der Beutelverpackung 10 eine Barrierelage mit Sauerstoffbarriereeigenschaften vorgesehen sein, wie etwa eine Metall-, insbesondere Aluminiumlage, oder eine Lage aus Ethylenvinylalkohol. The flexible film material used to form the pouch packaging 10 may be multi-layered and may therefore comprise, in addition to the already described sealing layer on the inside of the pouch, further plastic layers, for example oriented polyamide, oriented polypropylene, polyethylene trepphthalate and the like. Furthermore, for the advantageous packaging of foodstuffs in the pouch packaging 10, a barrier layer with oxygen barrier properties may be provided, such as a metal layer, in particular an aluminum layer, or a layer of ethylene vinyl alcohol.
In Fig. 2a ist grobschematisch ein Beutelrohling 40 dargestellt, aus welchem die spätere Beutelverpackung 10 von Fig. 1 entstehen kann. In Fig. 2a, a bag blank 40 is roughly illustrated, from which the later bag 10 of FIG. 1 may arise.
Die Beutelvorderseite und die Beutelrückseite liegen zu Beginn des Herstellungsverfahrens der Beutelverpackung 10 vorzugsweise als im Wesentlichen ebene, rechteckige Folienmaterialflecken vor, welche über die bereits beschriebenen Randsiegelabschnitte 16a, 16c und 16d miteinander verbunden sind. At the beginning of the manufacturing process of the bag package 10, the front side of the bag and the rear side of the bag are preferably in the form of substantially flat, rectangular film material patches, which are connected to one another via the previously described edge sealing sections 16a, 16c and 16d.
Der kopfseitige Randsiegelabschnitt 16b wird erst zu einem späteren Zeitpunkt verwirklicht werden, um eine Befüllung der Beutelverpackung zu gestatten. Weiterhin weist die Beutelvorderseite 12 eine Bedruckung 42 auf, welche ausgehend von einem zentralen Bereich zu den Randsiegelabschnitten 16a und 16b verzerrt, genauer: gestaucht, aufgetragen ist. Die Verzerrungsachsen, längs welchen der Verpackungsrohling 40 in dem nachfolgenden Tiefziehschritt unter Dehnung umgeformt wird, liegen im Wesentlichen orthogonal zu den jeweiligen Verpackungsränden im Bereich von deren jeweiliger Längsmitte. The head-side edge-sealing portion 16b will be realized only at a later time to allow filling of the bag package. Furthermore, the front side of the bag 12 has a printing 42, which is distorted starting from a central area to the edge sealing portions 16a and 16b, more precisely: compressed. The distortion axes along which the packaging blank 40 is stretch-formed in the subsequent deep-drawing step are substantially orthogonal to the respective wrapping edges in the region of their respective longitudinal center.
Die Verzerrungsachsen sind mit vi bis v4 in Fig. 2a angedeutet. In den Bereichen der Ecken des Beutelrohlings 40 ergibt sich beim Tiefziehen des Beutelrohlings 40 eine Dehnung des Materials längs einer Verzerrungsmischachse, welche sich aus einer Kombination der der jeweiligen Ecke nächstliegenden Verzerrungsachsen ergibt. The distortion axes are indicated by vi to v4 in Fig. 2a. In the areas of the corners of the bag blank 40 results in deep drawing of the bag blank 40, an elongation of the material along a distortion mixing axis, which results from a combination of the respective corner closest distortion axes.
In Fig. 3 ist ein Tiefziehwerkzeug 44 in einer zur Formschließrichtung des Tiefziehwerkzeugs 44 parallelen Schnittebene geschnitten dargestellt. FIG. 3 shows a deep-drawing tool 44 cut in a sectional plane parallel to the mold-closing direction of the deep-drawing tool 44.
Die Tiefziehform 44 umfasst ein Formoberteil 46 mit einem Rahmenteil 48 und einem daran längs der Formschließrichtung F beweglich aufgenommenen Tiefziehstempel 50. The deep-drawing mold 44 comprises a mold top part 46 with a frame part 48 and a deep-drawing die 50 movably received on it along the mold closing direction F.
Die Tiefziehform 44 umfasst weiter ein Formunterteil 52 mit einer darin vorgesehenen Kavität 54, welche im Wesentlichen komplementär zur Stempelwirkfläche 56 ausgebildet ist. Die Dicke des vorzugsweise einheitlichen Folienmaterials für die Beutelvorderseite 12 und die Beutelrückseite 14 ist im Vergleich zu den Abmessungen des Beutelrohlings 40 oder der späteren Beutelverpackung 10 orthogonal zur Dickenrichtung im Wesentlichen vernachlässigbar. The thermoforming mold 44 further comprises a mold bottom 52 having a cavity 54 provided therein, which is formed substantially complementary to the punch effective surface 56. The thickness of the preferably uniform film material for the bag front 12 and the bag back 14 is substantially negligible compared to the dimensions of the bag blank 40 or the later bag package 10 orthogonal to the thickness direction.
Die Formkavität 54 weist die Gestalt eines negativen Pyramidenstumpfs mit im Wesentlichen rechteckiger Grundfläche auf. Ebenso weist die Wirkfläche 56 des Tiefziehstempels 50 die Gestalt eines Pyramidenstumpfs auf. Die zwischen benachbarten Flächenbereichen dargestellten Ecken sind nur schematisch. Tatsächlich sind benachbarte tiefgezogene Flächenbereiche bevorzugt über verhältnismäßig große Übergangsradien miteinander verbunden, die besonders bevorzugt mehrere Millimeter betragen. The mold cavity 54 has the shape of a negative truncated pyramid with a substantially rectangular base. Likewise, the active surface 56 of the deep-drawing die 50 has the shape of a truncated pyramid. The corners shown between adjacent surface areas are only schematic. In fact, adjacent deep-drawn areas are preferably connected to each other via relatively large transition radii, which are particularly preferably several millimeters.
Die Querschnittsebene von Fig. 3 verläuft im Wesentlichen im Bereich des in Fig. 2a dargestellten Schriftzugs 42 durch den Beutelrohling 40. The cross-sectional plane of FIG. 3 extends essentially through the bag blank 40 in the region of the lettering 42 shown in FIG. 2 a.
Mit seinen bereits erzeugten Randsiegelabschnitten 16a und 16d liegt der Beutelrohling 40 auf entsprechenden, die Formkavität 54 umgebenden Auflagerändern des Formunterteils 52 auf. Der vor der Zeichenebene von Fig. 3 gelegene Randsiegelabschnitt 16c liegt ebenfalls auf einem Auflageabschnitt des Formunterteils 52 auf. Gleiches gilt für den noch ungesiegelten Kopfabschnitt 26 des Beutelrohlings 40. With its already produced edge sealing portions 16a and 16d, the bag blank 40 rests on corresponding support edges of the mold base 52 surrounding the mold cavity 54. The edge seal portion 16c located in front of the drawing plane of FIG. 3 also rests on a support portion of the mold base 52. The same applies to the still unsealed head portion 26 of the bag blank 40th
In Fig. 4 ist das Formoberteil 46 so weit in Formschließrichtung F zum Formunterteil 52 hin abgesenkt, dass ein Außenrandbereich des Beutelrohlings 40 zwischen dem Rahmen 48 des Formoberteils 46 und des Formunterteils 52 eingeklemmt und fixiert ist. 4, the upper mold part 46 is lowered so far in the mold closing direction F to the lower mold part 52 that an outer edge region of the bag blank 40 is clamped and fixed between the frame 48 of the upper mold part 46 and the lower mold part 52.
Sofern die Randsiegelabschnitte 6a, 16c und 16d bei einer alternativen Lösung des hier beispielhaft vorgestellten Verfahrens beim Einlegen der Beutelvorderseite 12 und der Beutelrückseite 14 noch nicht erzeugt sein sollten, können die genannten Randsiegelabschnitte auch durch den Rahmen 48 und das Formunterteil 52 erzeugt werden, wenn beispielsweise in dem Rahmen 48 oder/und im Formunterteil 52 entsprechende Heizvorrichtungen zur Erwärmung des den Randbereich des Beutelrohlings 40 klemmenden Werkzeugabschnitts vorgesehen sind. Insofar as the edge-sealing sections 6a, 16c and 16d should not have been produced in an alternative solution of the method presented here by way of example when inserting the bag front 12 and the bag back 14, said edge-sealing sections can also be produced by the frame 48 and the mold bottom 52, for example in the frame 48 and / or in the lower mold part 52 corresponding heating devices are provided for heating the edge portion of the bag blank 40 clamping tool section.
Der Tiefziehstempel 50 berührt in Fig. 4 mit seinem am weitesten zum Formunterteil 52 hin vorstehenden Abschnitt die ihm zugewandte Beutelseite, hier: die Beutelvorderseite 12. The deep-drawing die 50 in FIG. 4, with its section furthest to the lower mold part 52, touches the side of the bag facing it, here: the front side of the bag 12.
In Fig. 5 ist zu erkennen, wie der Tiefziehstempel 50 ausgehend von der in Fig. 4 gezeigten Stellung in Formschließrichtung F unter tiefziehender Ver- formung des Beutelrohlings 40 in die Formkavität 54 hinein abgesenkt wurde. 5, it can be seen how the deep-drawing die 50, starting from the position shown in FIG. 4 in the form-closing direction F, is subjected to deep drawing. formation of the bag blank 40 has been lowered into the mold cavity 54 into it.
Dabei wurden vor allen Dingen die in Fig. 5 zur Formschließrichtung F geneigten Flächenbereiche des Beutelrohlings 40 gedehnt. In this case, in particular the surface areas of the bag blank 40 which are inclined in FIG. 5 to the mold closing direction F were stretched.
In Fig. 6 ist dagegen dargestellt, wie der Tiefziehstempel 50 relativ zum Rahmen 48 entgegen der Formschließrichtung F bewegt wurde, um die aufeinander zu weisenden Oberflächeninnenbereiche 58 der Beutelvorderseite 12 und 60 der Beutelrückseite 14 voneinander weg zu bewegen. On the other hand, FIG. 6 shows how the deep-drawing die 50 has been moved relative to the frame 48 counter to the mold closing direction F in order to move the mutually facing surface inner regions 58 of the bag front 12 and 60 of the bag back 14 away from each other.
Hierzu können in dem Tiefziehstempel 50 und im Formunterteil 52 Unterdruckkanäle vorgesehen sein (in Fig. 6 nicht dargestellt), welche in dem dem Formunterteil 52 nächstgelegenen Flächenabschnitt der Wirkfläche 56 des Tiefziehstempels 50 und in der Kavität 54 des Formunterteils 52 münden können, um Abschnitte der Beutelvorderseite 12 und der Beutelrückseite 14 mit Unterdruck zu greifen und durch Relativbewegung von Tiefziehstempel 50 und Formunterteil 52 voneinander zu entfernen, um ein Beutelvolumen 62 zur Befüllung des Beutels nutzbar zu machen. For this purpose, vacuum channels may be provided in the deep-drawing die 50 and in the lower mold part 52 (not shown in FIG. 6), which may open in the surface 52 of the active surface 56 of the deep-drawing die 50 closest to the lower mold part 52 and in the cavity 54 of the lower mold part 52 Bag front side 12 and the bag rear 14 to grip with negative pressure and to remove by relative movement of thermoforming punch 50 and mold base 52 from each other to make a bag volume 62 for filling the bag available.
In Fig. 6 ist überdies die orthogonal zur Zeichenebene der Fig. 6 orientierte Verbindungsfläche 22 zu erkennen. In FIG. 6, moreover, the connection surface 22 oriented orthogonally to the plane of the drawing of FIG. 6 can be seen.
In Fig. 7 ist die fertig befüllte und vollständig versiegelte Beutelverpackung 10 dargestellt. In Fig. 7, the finished filled and fully sealed bag 10 is shown.
Aufgrund der beim Tiefziehvorgang eingetretenen Dehnung ist der Schrift- zug 42 entzerrt. Da die gestauchte Darstellung des ursprünglich aufgetragenen Schriftzugs 42 des ebenen Beutelrohlings 40 auf die sich beim Tiefziehvorgang einstellende Dehnung abgestimmt ist, erscheint der Schriftzug 42 an der fertigen Beutelverpackung 10 unverzerrt. Abweichend von der hier dargestellten einfachen Ausführungsform eines Vier-Rand-Siegelbeutels kann die Beutelverpackung 10 auch als Standbeutel ausgebildet sein, dann kann beispielsweise an dem bodennahen Längsende 28 ein Boden eingesiegelt sein. Due to the elongation that occurred during the deep-drawing process, the lettering 42 is rectified. Since the compressed representation of the originally applied lettering 42 of the flat bag blank 40 is matched to the strain occurring during the deep-drawing process, the lettering 42 on the finished bag packaging 10 appears undistorted. Notwithstanding the simple embodiment of a four-edge sealed bag shown here, the bag package 10 can also be designed as a stand-up pouch, then, for example, a bottom can be sealed at the ground-level longitudinal end 28.
In Fig. 7 ist zu erkennen, dass der ursprünglich nach oben offene Beutelrohling 40 seinen abschließenden Randsiegelabschnitt 16b erhalten hat, welcher die Beutelverpackung 10 vollständig verschließt. Die Aufreißhilfe 30 ist derart vorgesehen, dass mit ihr ein Riss unmittelbar unterhalb des Randsie- gelabschnitts 16b eingeleitet und dadurch die Beutelverpackung 10 geöffnet werden kann. In Fig. 7 it can be seen that the originally upwardly open bag blank 40 has received its final marginal sealing portion 16b, which completely closes the bag package 10. The tear-open aid 30 is provided in such a way that a tear can be introduced with it directly underneath the edge-rail portion 16b and the bag-type packaging 10 can thereby be opened.

Claims

Ansprüche claims
1 . Verfahren zur Herstellung eines Verpackungsbeutels (10) mit wenigstens einer Beutelvorderseite ( 2) und einer Beutelrückseite (14) aus jeweils flexiblem Folienmaterial, welches folgende Schritte umfasst: 1 . Method for producing a packaging bag (10) having at least one front side of a bag (2) and one bag rear side (14) made of respectively flexible film material, comprising the following steps:
Tiefziehen der Beutelvorderseite (12),  Thermoforming the front of the bag (12),
Tiefziehen der Beutelrückseite (14),  Deep drawing the bag back (14),
Verbinden von Beutelvorderseite (12) und Beutelrückseite (14), dadurch gekennzeichnet, dass das Tiefziehen der Beutelvorderseite (12) und der Beutelrückseite (14) in einem gemeinsamen Tiefziehschritt an bereits mit einander verbundenen Seiten: Beutelvorderseite (12) und Beutelrückseite (14), oder während eines Schrittes einer Verbindung von Beutelvorderseite (12) und Beutelrückseite (14) ausgeführt wird.  Connecting the front side of the bag (12) and the back of the bag (14), characterized in that the deep drawing of the front side of the bag (12) and the rear side of the bag (14) in a common deep drawing step on already connected sides: bag front (12) and bag back (14), or during a step of connecting the bag front side (12) and the bag back side (14).
2. Verfahren nach Anspruch 1 , 2. The method according to claim 1,
dadurch gekennzeichnet, dass es nach dem Tiefziehen einen Schritt eines Auseinanderbewegens von aufeinander zu weisenden Oberflächeninnenbereichen (58, 62) der Beutelvorderseite (12) und der Beutelrückseite (14) zur Bildung eines Beutelvolumens umfasst.  characterized in that it comprises, after deep drawing, a step of moving apart facing surface portions (58, 62) of the bag front (12) and the bag back (14) to form a bag volume.
3. Verfahren nach Anspruch 2, 3. The method according to claim 2,
dadurch gekennzeichnet, dass der Schritt des Auseinanderbewegens von Oberflächeninnenbereichen (58, 62) ein Anlegen von Unterdruck an einen Oberflächenaußenbereich wenigstens einer Seite aus Beutelvorderseite (12) und Beutelrückseite (14) umfasst.  characterized in that the step of moving surface interior regions (58, 62) comprises applying vacuum to an exterior surface area of at least one of the bag front (12) and bag back (14) sides.
4. Verfahren nach Anspruch 2 oder 3, 4. The method according to claim 2 or 3,
dadurch gekennzeichnet, dass der Schritt des Auseinanderbewegens von Oberflächeninnenbereichen (58, 62) ein Anlegen von Überdruck an wenigstens einen Oberflächeninnenbereich (58, 62) einer Seite aus Beutelvorderseite (12) und Beutelrückseite (14), vorzugsweise an den  characterized in that the step of moving apart interior surface areas (58, 62) applies overpressure to at least one interior surface area (58, 62) of one of the bag front (12) and bag back (14) sides, preferably the front
Oberflächeninnenbereich (58, 62) sowohl der Beutelvorderseite (12) als auch der Beutelrückseite (14) umfasst. Surface inside region (58, 62) of both the bag front side (12) and the bag back (14).
Verfahren nach einem der vorhergehenden Ansprüche, Method according to one of the preceding claims,
dadurch gekennzeichnet, dass es vor oder während des Tiefziehens einen Schritt eines Verbindens von Abschnitten aus flexiblem Folienmaterial umfasst. characterized in that before or during the deep drawing it comprises a step of joining sections of flexible film material.
Verfahren nach Anspruch 5, Method according to claim 5,
dadurch gekennzeichnet, dass das Verbinden von Abschnitten aus flexiblem Material die Herstellung wenigstens einer Siegelnaht (16), insbesondere Fin-Siegelnaht, umfasst. characterized in that the joining of sections of flexible material comprises the production of at least one sealed seam (16), in particular fin-sealed seam.
Verfahren nach Anspruch 5 oder 6, Method according to claim 5 or 6,
dadurch gekennzeichnet, dass das Verbinden von Abschnitten aus flexiblem Material die Herstellung einer den Beutelinnenbereich an zwei oder drei Seiten einfassenden Siegelnaht (16), insbesondere Randsiegelnaht (16), zur wenigstens abschnittsweisen Verbindung von Beutelvorderseite (12) und Beutelrückseite (14) umfasst. characterized in that the joining of sections of flexible material comprises the production of a sealing seam (16), in particular marginal sealing seam (16) which encloses the inner area of the bag on two or three sides, for at least sectionally connecting the front side of the bag (12) and the back of the bag (14).
Verfahren nach einem der Ansprüche 5 bis 7, Method according to one of claims 5 to 7,
dadurch gekennzeichnet, dass das Verbinden von Abschnitten aus flexiblem Material ein Anbringen eines Beutelbodens an die Beutelvorderseite (12) und die Beutelrückseite (14) umfasst. characterized in that joining portions of flexible material comprises attaching a bag bottom to the bag front (12) and the bag back (14).
Verfahren nach einem der vorhergehenden Ansprüche, Method according to one of the preceding claims,
dadurch gekennzeichnet, dass es vor dem Tiefziehen das Aufbringen eines längs wenigstens einer Verzerrungsachse (vi , v2, v3, v4) verzerrten Druckbildes (42) auf wenigstens eine Seite aus Beutelvorderseite (12) und Beutelrückseite (14) derart umfasst, dass das Druckbild (42) durch das Tiefziehen zusammen mit dem es tragenden flexiblen Material längs der Verzerrungsachse (vi , v2, v3, v4) zu einem Bild mit im Wesentlichen gleichmäßigen Proportionen in der Erstreckungsfläche des es tragenden flexiblen Materials entzerrt wird. characterized in that before deep drawing it comprises the application of a printed image (42) distorted along at least one distortion axis (vi, v2, v3, v4) to at least one side of the front of the bag (12) and the rear of the bag (14) such that the printed image ( 42) by deep drawing together with the flexible material carrying it along the warp axis (vi, v2, v3, v4) into an image substantially equal proportions in the extension surface of the flexible material carrying it is equalized.
Beutelhalbzeug (40) aus flexiblem Folienmaterial mit wenigstens einer Beutelvorderseite (12) und einer Beutelrückseite (14), welche längs einer Verbindungsfläche (22) mit einander verbunden sind, wobei sowohl die Beutelvorderseite (12) als auch die Beutelrückseite (14) bezüglich der Verbindungsfläche (22) zur Bereitstellung eines späteren Beutelinnenvolumens ausgebeult sind, A bag stock (40) of flexible sheet material having at least one bag front (12) and a bag back (14) joined along a connecting surface (22) with both the bag front (12) and bag back (14) relative to the connecting surface (22) bulged to provide a later bag internal volume,
dadurch gekennzeichnet, dass die Beutelvorderseite (12) und die Beutelrückseite (14) bezüglich der Verbindungsfläche (22) zur selben Seite ausgebeult sind.  characterized in that the bag front side (12) and the bag rear side (14) are bulged with respect to the connecting surface (22) to the same side.
Beutelhalbzeug nach Anspruch 10, Bag semifinished product according to claim 10,
dadurch gekennzeichnet, dass die aufeinander zu weisenden freien Oberflächeninnenbereiche (58, 62) der Beutelvorderseite (12) und der Beutelrückseite (14) wenigstens abschnittsweise, vorzugsweise vollständig, aneinander anliegen. 12. Beutelhalbzeug nach Anspruch 0 oder 1 1 ,  characterized in that the mutually facing free surface inner regions (58, 62) of the bag front side (12) and the bag back (14) at least partially, preferably completely, abut each other. 12. bag semifinished product according to claim 0 or 1 1,
dadurch gekennzeichnet, dass die Verbindungsfläche (22) im Wesentlichen eben ist.  characterized in that the connecting surface (22) is substantially planar.
Beutelhalbzeug nach einem der Ansprüche 10 bis 12, Bag semifinished product according to one of claims 10 to 12,
dadurch gekennzeichnet, dass es einen zumindest abschnittsweise zwischen der Beutelvorderseite (12) und der Beutelrückseite (14) gelegenen Bodenabschnitt aufweist.  characterized in that it comprises at least partially between the bag front side (12) and the bag rear side (14) located bottom portion.
14. Beutelhalbzeug nach einem der Ansprüche 10 bis 13, 14. bag semifinished product according to one of claims 10 to 13,
dadurch gekennzeichnet, dass es zur Ausbildung eines Aufreißabschnitts (26) einen Abschnitt, vorzugsweise einen Längsendbereich (26) mit unverformtem flexiblem Folienmaterial an Beutelvorderseite (12) oder/und Beutelrückseite (14) aufweist.  characterized in that it has a section, preferably a longitudinal end region (26) with an undeformed flexible film material on the front of the bag (12) and / or the back of the bag (14) to form a tear-open section (26).
PCT/EP2012/052531 2011-02-15 2012-02-14 Package comprising a thermoformed bag, method for producing the same and semifinished package WO2012110525A2 (en)

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DE102011004173A DE102011004173A1 (en) 2011-02-15 2011-02-15 Thermoformed bag packaging, process for making same and packaging semi-finished product

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9757890B2 (en) 2014-02-18 2017-09-12 Technoflex Method for producing at least one flexible plastic container

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3017564B1 (en) * 2014-02-18 2016-09-16 Technoflex PROCESS FOR MANUFACTURING AT LEAST ONE PLASTIC SOFT CONTAINER
DE102022129393A1 (en) 2022-11-08 2024-05-08 Audi Aktiengesellschaft Cell separator for arrangement between two battery cells, method for producing a cell separator and method for producing a battery module

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1567337A (en) * 1976-12-21 1980-05-14 Aluminiumwerke Ag Rorschach Method of and apparatus for producing a receptance
JP3063236B2 (en) * 1991-06-20 2000-07-12 凸版印刷株式会社 Food preservation method, container used therefor, and method of manufacturing container

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9757890B2 (en) 2014-02-18 2017-09-12 Technoflex Method for producing at least one flexible plastic container

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