EP2179824A1 - Dispositif pour poinçonner des séries de microperforations dans un matériau sous forme de film - Google Patents

Dispositif pour poinçonner des séries de microperforations dans un matériau sous forme de film Download PDF

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Publication number
EP2179824A1
EP2179824A1 EP08167425A EP08167425A EP2179824A1 EP 2179824 A1 EP2179824 A1 EP 2179824A1 EP 08167425 A EP08167425 A EP 08167425A EP 08167425 A EP08167425 A EP 08167425A EP 2179824 A1 EP2179824 A1 EP 2179824A1
Authority
EP
European Patent Office
Prior art keywords
support surface
film material
needles
polymer film
needle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08167425A
Other languages
German (de)
English (en)
Inventor
Adrianus Johanus Maria Hofstee
Roger Wardenburg
Paul Malgo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wardenburg Malgo Engineering BV
Ulma Packaging BV
Original Assignee
Wardenburg Malgo Engineering BV
Ulma Packaging BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wardenburg Malgo Engineering BV, Ulma Packaging BV filed Critical Wardenburg Malgo Engineering BV
Priority to EP08167425A priority Critical patent/EP2179824A1/fr
Publication of EP2179824A1 publication Critical patent/EP2179824A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/24—Perforating by needles or pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed

Definitions

  • the present invention relates to a device and a method for producing a series of microperforations in film material.
  • EP-A1-1.714.885 discloses a packaging apparatus which makes deep-drawn containers which are filled and sealed with a sealing film.
  • the apparatus comprises a perforation device for providing said sealing film with series of perforations with a cross section of 20-50 microns. The device is not further described.
  • US-5,720,915 discloses an apparatus for perforating the smooth surface of open-cell plastic foam sheets.
  • a thermoforming unit is provided with needles which are movable in a mould block. The needles are biased to be retracted in the mould block, and can be activated to extend out of the mould block for perforating the surface of a plastic foam sheet. The needles are not intended for perforating though the sheet.
  • the invention aims to provide a device which can apply series of perforations to film material.
  • Another or alternative object of the invention is to provide a device which can apply series of perforations to film material at high speed.
  • a device for punching series of perforations in a length of film material like a polymer foil, comprising a planar support surface for supporting said film material, a needle frame mounted reciprocatingly movable above said support surface, said needle frame holding a series of needles with their needle tips towards said support surface and which are mounted in said needle frame to be substantially freely movable in their longitudinal direction, said device further comprising an actuator for reciprocate said needle frame towards said support surface for bringing the tips of said needles in contact with said support surface.
  • the invention further provides to a method for punching series of microperforations in a length of polymer film, wherein a part of said polymer film is advanced over a planar support surface and is rested on said planar support surface, a frame provided with a series of needles which are free moveable in their longitudinal direction is moved downward with the tips of the needles piercing the part of polymer film until they rest on said planar support surface, said frame is moved upward away from said polymer film until said needles are free from said polymer film, and said punctured part of polymer film is advanced further until a new part of un-punctured polymer film rests on said planar support surface.
  • the invention further relates to a polymer film material for use in food packaging, said film material having a food side directed towards the food to be packed, and an outside directed away from said food, said film material having a thickness of about 10-50 microns and comprising about 1-1600 microperforations per square metre, wherein said microperforations are about 50-300 microns in cross section and are tapered towards the outside.
  • This method, device provides the possibility of making well-defined microperforations in a film material at high speed and without damaging the film material.
  • the method and device provide a specific polymer film material which has unique properties, in particular in the field of food packaging.
  • the tips of the needles are defined as the part at the end of a needle which is substantially conical.
  • the film material can be a single layer material, but also be a multi layer laminate.
  • the film material will be a polymer film, for instance used as a sealing film, for instance used in food packaging.
  • the film material can comprise a thermoplastic polymer, for instance polyethylene (PE), polypropylene (PP), polyester like PET, polyamide (PA) polymer.
  • said needle frame is biased away from said support surface. In this way, the working speed increases.
  • each needle has a weight near said end away from said tip, for urging said needle towards said support surface.
  • the device further comprises a transporter for advancing a band of said film material through said device over said support surface.
  • the device further comprising a controller for instructing said transporter to advance said film material a predefined length over said support surface, stopping said film material, and for after stopping said film material activating said actuator to move said needle frame in the direction of said support surface for said needles to puncture said film material.
  • said support surface comprises a layer of compressible material.
  • said layer of compressible material comprises a top layer rubber-like material, in an embodiment a layer of polyurethane, for instance a layer of material commercially known as habasiet®. It was found that better results could be obtained with a material which elastically deforms a little when the needles are pushed onto the material.
  • said tips of the needles are adapted to make perforations have a cross section for providing a liquid-tight film material, pref of about 50-300 micron.
  • liquid-tight means that when water is applied on the film, the water will not drip through the microperforations.
  • the microperforations are of such size, however, that water will pass through or evaporate in the form of moisture.
  • said needles are positioned in said frame and the length of said tips are adapted to have the tips extend through the film material.
  • the length of the tip is larger than the thickness of the film material. The tip does not penetrate the film material completely, but the end of the tip extends out of the film material. In that way, a tapered perforation is made.
  • said needles are positioned in said needle frame to produce a matrix of perforations.
  • said film material is for sealing a product, and said film material has a product side directed towards the product to be sealed, and an outside directed away from said product, and said film material is provided in said device with its outside on said planar support surface and said device punctures said film from the product side.
  • This provides microperforations which are tapered or conical towards the outside. I.e., the cross section at the product side is larger than the cross section at the outside of the film material. It was found that this resulted in an optimal moisture transmission. The microperforations were drip-proof.
  • the invention also pertains to such film material, and to a packaging sealed with said film material.
  • said microperforations have cross section of 50-300 micron. It was found that such a cross section provides drip-proof perforations but which allow moisture to pass.
  • said polymer film preferably thermoplastic polymer film, has a thickness of about 10-50 micron.
  • the method results in about 1-1600 perforations per square meter.
  • the number depends on the packaging.
  • said polymer film is for sealing a product, and said polymer film has a product side directed towards the product to be sealed, and an outside directed away from said product, and said film material is advanced with its outside on said planar support surface and punctured from the product side. It was found that with this method, tapered microperforations could be obtained with the best performance.
  • the invention further pertains to an apparatus comprising one or more of the characterising features described in the description and/or shown in the attached drawings, and to a method comprising one or more of the characterising features described in the description and/or shown in the attached drawings.
  • Figure 1 shows a device for puncturing a series of perforations in the length of film material 3.
  • the device has a transport unit 2.
  • this may be a transport band which transports the film material through the device.
  • This transport band runs over a support providing plate 4.
  • the film material 3 is transported using an external transport device.
  • the transport unit 2 has guiding rolls which transport the film material 3 over a support surface.
  • the puncturing device 1 further has a support frame 5 onto which the transport unit is mounted.
  • mounted to frame 5 are actuators 8 which are mounted to move a needle frame 6 in a reciprocating manner up and down to the planar support surface 4.
  • Frame 5 further comprises a plate 10 mounted between needle frame 6 and the support surface 4.
  • the needle frame 6 is mounted biased away from plate 10 using springs 9 positioned between needle plate 6 and frame plate 10.
  • Needle plate 6 holds needles 7 which have a longitudinal axis 9. These needles are held in such a way that they can move freely in upwards direction along longitudinal axis L.
  • Figure 2 shows the device of Figure 1 in a transverse cross section.
  • the band of transport band 2 has been removed in order to view to transport rolls 11 and 12.
  • FIG. 3 shows the detail already indicated in Figure 1 .
  • the frame plate 10 is attached to frame 5 of the device which is the earth bounded reference frame.
  • the needle frame 6 is spring-coupled to this frame plate 10 to be able to move to and away from this frame plate 10.
  • Needle plate 6 is provided with microperforations which hold a holder 13 for a needle 12.
  • Attached on top of holder 13 is a weight 14.
  • a stop 15 is attached to holder 13 between weight 14 and needle plate 6, and a stop 15.
  • the needle assembly 7 does move freely upwards with respect to needle plate 6.
  • the position of needle assembly stop 15 together with the distance between the needle plate 6 and frame plate 10 define the depth with which the needle 12 can puncture a foil 3.
  • actuators 8 are adapted to have a pushing member 17 which can move up and down in order to urge needle plate 6 towards frame plate 10.
  • the length of part 17 can be modified in order to adjust the penetration depth of needle 12.
  • support plate 6 has a support plate layer of compressible material 17. It was found that when using a compressible material, such as a rubbery polyurethane layer, it was possible to puncture for instance a polymer film using needle 12 in such a way that well defined, round microperforations can be made.
  • Figure 4 shows a top view of the device for puncturing a series of perforations 1. Again, the same reference numbers as before are used.
  • the needle frame and weight on the needles and the vertical positions of the needles is set in such a way that a part of the tips remains out of the film material.
  • the tip preferably does not fully puncture the film material.
  • This provides a film material with tapered holes. It was found that such holes provide a valve action, thus allowing a proper moisture balance in a packaging for for instance food products. For instance for fresh fruit.
  • the transport unit transports the film material a working length into the device.
  • the actuator then urges the needle frame down.
  • the needles this puncture the film material.
  • the actuator releases the film frame.
  • the needles thus come free from the film material, because the needle frame is pushed up by the biasing force of the springs.
  • the transporter advances the film material a working length in order to provide a fresh, un-punctured length of material. This process is repeated of a full length of film material.
  • the device can easily be incorporated in a packaging line. For instance, the device can be placed in a deep-draw packaging line, Vertical form fill and seal machines, Topseal machines, flowwrappers, L bar sealers.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP08167425A 2008-10-23 2008-10-23 Dispositif pour poinçonner des séries de microperforations dans un matériau sous forme de film Withdrawn EP2179824A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08167425A EP2179824A1 (fr) 2008-10-23 2008-10-23 Dispositif pour poinçonner des séries de microperforations dans un matériau sous forme de film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08167425A EP2179824A1 (fr) 2008-10-23 2008-10-23 Dispositif pour poinçonner des séries de microperforations dans un matériau sous forme de film

Publications (1)

Publication Number Publication Date
EP2179824A1 true EP2179824A1 (fr) 2010-04-28

Family

ID=40394335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08167425A Withdrawn EP2179824A1 (fr) 2008-10-23 2008-10-23 Dispositif pour poinçonner des séries de microperforations dans un matériau sous forme de film

Country Status (1)

Country Link
EP (1) EP2179824A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3808552A1 (fr) * 2019-10-17 2021-04-21 Cuki Cofresco S.r.l. Procédé et appareil de fabrication de plateaux d'aluminium microperforés pour produits alimentaires

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718077A1 (fr) * 1994-12-23 1996-06-26 Hoechst Aktiengesellschaft Procédé et dispositifs pour perforer des surfaces lisses à cellules fermées de feuilles en mousse à cellules ouvertes
EP1714885A1 (fr) 2005-04-19 2006-10-25 Multivac Sepp Haggenmüller GmbH & Co. KG Machine d'emballage
EP1757375A1 (fr) * 2004-05-20 2007-02-28 Orient Instrument Computer Co., Ltd Dispositif de destruction d'un support d'enregistrement
EP1839825A1 (fr) * 2006-03-29 2007-10-03 Groz-Beckert KG Procédé et appareil de production pour des feuilles perforées

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718077A1 (fr) * 1994-12-23 1996-06-26 Hoechst Aktiengesellschaft Procédé et dispositifs pour perforer des surfaces lisses à cellules fermées de feuilles en mousse à cellules ouvertes
US5720915A (en) 1994-12-23 1998-02-24 Depron B.V. Processes and apparatuses for perforating smooth, closed-cell surfaces of open-cell plastic foam sheets
EP1757375A1 (fr) * 2004-05-20 2007-02-28 Orient Instrument Computer Co., Ltd Dispositif de destruction d'un support d'enregistrement
EP1714885A1 (fr) 2005-04-19 2006-10-25 Multivac Sepp Haggenmüller GmbH & Co. KG Machine d'emballage
EP1839825A1 (fr) * 2006-03-29 2007-10-03 Groz-Beckert KG Procédé et appareil de production pour des feuilles perforées

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3808552A1 (fr) * 2019-10-17 2021-04-21 Cuki Cofresco S.r.l. Procédé et appareil de fabrication de plateaux d'aluminium microperforés pour produits alimentaires

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