EP0128056A1 - Verfahren und Vorrichtung zum Schrumpfen von einem mit einer Schrumpfhaube überzogenen Stapel - Google Patents

Verfahren und Vorrichtung zum Schrumpfen von einem mit einer Schrumpfhaube überzogenen Stapel Download PDF

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Publication number
EP0128056A1
EP0128056A1 EP84400802A EP84400802A EP0128056A1 EP 0128056 A1 EP0128056 A1 EP 0128056A1 EP 84400802 A EP84400802 A EP 84400802A EP 84400802 A EP84400802 A EP 84400802A EP 0128056 A1 EP0128056 A1 EP 0128056A1
Authority
EP
European Patent Office
Prior art keywords
cover
load
hot gas
vertical axis
distance
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Withdrawn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
EP84400802A
Other languages
English (en)
French (fr)
Inventor
Louis Hugon
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.)
Pakem A Responsabilite Ltee Ste
Original Assignee
Pakem A Responsabilite Ltee Ste
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 Pakem A Responsabilite Ltee Ste filed Critical Pakem A Responsabilite Ltee Ste
Publication of EP0128056A1 publication Critical patent/EP0128056A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/066—Mobile frames, hoods, posts or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/001—Arrangements to enable adjustments related to the product to be packaged

Definitions

  • the invention relates to a method for the retraction of a plastic cover covering a load of any shape and palletized and an automatic machine for carrying out the method.
  • the distance between the heat sources allowing the shrinkage of the cover and the vertical axis of the load is fixed and therefore, the distance between the cover and the heat sources cannot be kept substantially constant.
  • this distance cover-heat source is very important because if the cover is too close to the heat source, it undergoes deterioration and if the cover is too far from the heat source, the shrinkage of the cover is bad .
  • the invention aims to overcome these drawbacks.
  • An object of the invention is therefore to provide a method and a device for retracting a cover allowing correct retraction of the plastic cover covering a load having any volume.
  • the invention provides a method for the retraction of a plastic cover covering a load of any volume and palletized, in which a hot gas is sent, on the cover, on adjacent areas of the cover.
  • a hot gas is sent, on the cover, on adjacent areas of the cover.
  • the hot gas can be sent simultaneously to all the adjacent areas of the cover. But it is also possible to send, if desired, the hot gas successively to the adjacent areas of the cover.
  • the gas flow is sent to the sides of the load in parallel directions.
  • these directions are horizontal.
  • gas flow is sent to the top of the load, in directions parallel and inclined with respect to the horizontal, in the direction of the load.
  • the invention further relates to a device for the retraction of a plastic cover covering a load of any volume and palletized. It comprises in combination a load receiving table, of vertical axis, one or more hot gas spray nozzles associated with at least one bracket and directed substantially towards the vertical axis of the table, and means for controlling the distance between the cover and the nozzle (s) and means for adjusting this distance.
  • the device comprises means for moving an area with respect to the nozzle opposite this area.
  • Means for driving the table in rotation about its vertical axis allow this relative movement. Or, the latter is obtained by means of driving, along a determined path, the stem.
  • the single figure is an elevational view of an embodiment of the device according to the invention.
  • a cover 1 is retracted from a plastic material, for example from a retractable and self-adhesive synthetic material, which covers a load 2.
  • This load 2 has any volume.
  • the lower face 3 of which is for example rectangular or square and the upper face 4 of which is also rectangular or square, but the sides of which are lower than the sides of the lower face 3.
  • e can be equal to e l in the lower zone of the load and equal to e 2 in the upper zone of load 2, with e 2 e 1 .
  • the load 2 rests on a pallet 5 which itself is arranged for example on a load support table 6.
  • the sheath 1 which covers the load 2 can cover the lateral faces of the load 2 only or can cover the lateral faces of the load and its upper face 4.
  • a hot gas is sent to the cover 1, and in particular to zones Z 1 , 2 2 .... Z N adjacent to the cover 1.
  • the zones Z 1 , Z 2 .... Z n are the peripheries of the truncated pyramids, each upper face of which is the lower face of the upper truncated pyramid.
  • the distance under which the hot gas is sent is controlled and kept strictly constant.
  • the hot gas is sent via one or more nozzles T 1 , T 2 ... T N. These nozzles project hot gas onto the respective zones Z 1 , Z 2 .... Z n .
  • Each nozzle T 1 .... T N is associated with a bracket 7 and is directed substantially towards the vertical axis XX of the table 5.
  • Each nozzle T 1 , T 2 .... T N can slide along the gallows 7.
  • zones Z 1 , Z 2 ?? Z N are delimited. higher or lower.
  • the distance L between the bracket 7 and the vertical axis XX of the table is constant.
  • the distance d between the nozzle T and the sheath 1 is strictly constant. This distance d is predetermined as a function of the nature of the sheath, the temperature of the hot gases, in particular.
  • the distance d under which the hot gas is sent to the sheath 1 is controlled and for this purpose the distance D N is varied between the source of hot gas and the bracket 7.
  • d L - D N -e N
  • D N the distance between the sheath and the vertical axis decreases.
  • the hot gas can be sent successively to adjacent areas of the cover.
  • the hot gas is sent simultaneously to all the adjacent areas of the cover 1.
  • the device comprises means 8 for controlling the distance d between the cover 1 and the nozzles T 1 ?? T N and means 9 for adjusting this distance.
  • the control means 8 can for example be constituted by feelers 20 (only one of which is shown in the figure) or by photoelectric devices.
  • the device comprises means 11 for varying the distance d between the zones and the nozzles.
  • These variation means 11 can for example be constituted by jacks 12 1 , 12 2 .... 12 N which allow the nozzles T 1 , T 2 , .... T N to approach or move away from the cover 1.
  • displacement means 13 make it possible to vary the relative position of a zone Z with respect to the nozzle T N opposite this zone.
  • the displacement means 13 are, according to a first embodiment of the invention, constituted by rotation drive means 14 of the table 6, around its vertical axis XX.
  • the rotation drive means 14 have the function of scrolling the entire zone Z N in front of the corresponding nozzle T N.
  • the load 2 remains fixed and the device comprises drive means 15 along a determined path of the bracket 7.
  • the movement of the bracket 7 around the load 2 is manual or guided according to a pre-established route.
  • Each nozzle T N has a horizontal axis YY placed in a radial plane of the device, passing through the vertical axis.
  • this YY axis can possibly tilt relative to the horizontal This is more particularly the axis of the nozzle T N opposite the upper face 4 of the cover 1.
  • the cover resting on the upper face of the load can be retracted. So we can send the stream. of gas on the sides of the load in parallel, preferably horizontal, directions. It is also possible to send the gas flow in a direction inclined to the vertical.
  • brackets 7, 7 ' can be approached or removed from the load by jacks 16, 16'.
  • the nozzles T 1 ... T N can be movable along a vertical axis YY of the bracket 7.
  • One or more vertically moving nozzles can be provided.
  • 7,7 'brackets can be adjusted to operate simultaneously or independently for separate palletized loads and of different volume.
  • nozzles of each bracket operate to retract the same palletized load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP84400802A 1983-05-25 1984-04-19 Verfahren und Vorrichtung zum Schrumpfen von einem mit einer Schrumpfhaube überzogenen Stapel Withdrawn EP0128056A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8308643A FR2546479B1 (fr) 1983-05-25 1983-05-25 Procede et dispositif ameliore pour la retraction d'une housse en matiere plastique recouvrant une charge
FR8308643 1983-05-25

Publications (1)

Publication Number Publication Date
EP0128056A1 true EP0128056A1 (de) 1984-12-12

Family

ID=9289163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400802A Withdrawn EP0128056A1 (de) 1983-05-25 1984-04-19 Verfahren und Vorrichtung zum Schrumpfen von einem mit einer Schrumpfhaube überzogenen Stapel

Country Status (2)

Country Link
EP (1) EP0128056A1 (de)
FR (1) FR2546479B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990011223A1 (en) * 1989-03-17 1990-10-04 Ole Bressendorf A method and an apparatus for shrinking of wrapping films
EP0397579A1 (de) * 1989-05-11 1990-11-14 Sleever International Company Verfahren zum Kontrollieren der Temperatur eines an beiden Enden offenen Tunnelofens und dazugehörige Vorrichtung
WO2001014803A1 (en) * 1999-08-19 2001-03-01 Cpfilms Inc. Method and apparatus for improved fitting of heat shrinkable film

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826358A1 (de) * 1988-06-02 1989-12-07 Moellers Maschf Gmbh Vorrichtung zum heissschrumpfen einer folie um einen zu verpackenden gegenstand
DE8807204U1 (de) * 1988-06-02 1988-09-15 Maschinenfabrik Möllers GmbH u. Co, 4720 Beckum Vorrichtung zum Heißschrumpfen einer Folie um einen zu verpackenden Gegenstand

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2158936A5 (de) * 1971-10-25 1973-06-15 Ahrendt & Birkendahl Ohg
FR2416169A1 (fr) * 1978-02-06 1979-08-31 Msk Verpackung Syst Gmbh Installation de retraction pour l'emballage d'objets, au moyen d'une feuille retractable
FR2463726A1 (fr) * 1979-08-24 1981-02-27 Pakem Procede et machine pour la retraction d'une housse en matiere plastique recouvrant une charge palettisee

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2158936A5 (de) * 1971-10-25 1973-06-15 Ahrendt & Birkendahl Ohg
FR2416169A1 (fr) * 1978-02-06 1979-08-31 Msk Verpackung Syst Gmbh Installation de retraction pour l'emballage d'objets, au moyen d'une feuille retractable
FR2463726A1 (fr) * 1979-08-24 1981-02-27 Pakem Procede et machine pour la retraction d'une housse en matiere plastique recouvrant une charge palettisee

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990011223A1 (en) * 1989-03-17 1990-10-04 Ole Bressendorf A method and an apparatus for shrinking of wrapping films
EP0397579A1 (de) * 1989-05-11 1990-11-14 Sleever International Company Verfahren zum Kontrollieren der Temperatur eines an beiden Enden offenen Tunnelofens und dazugehörige Vorrichtung
US5031298A (en) * 1989-05-11 1991-07-16 Sleever International Company Method of controlling constant temperature inside a shrink-fitting tunnel
WO2001014803A1 (en) * 1999-08-19 2001-03-01 Cpfilms Inc. Method and apparatus for improved fitting of heat shrinkable film
US6304720B1 (en) * 1999-08-19 2001-10-16 Cpfilms Inc. Heat shrinking heat gun with fan-shaped nozzle with temperature and/or airflow variation along the nozzle

Also Published As

Publication number Publication date
FR2546479A1 (fr) 1984-11-30
FR2546479B1 (fr) 1986-06-06

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: HUGON, LOUIS