EP0538925B1 - Air-cooled oven, in particular for packaging products with heat-shrinkable film - Google Patents

Air-cooled oven, in particular for packaging products with heat-shrinkable film Download PDF

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Publication number
EP0538925B1
EP0538925B1 EP92202986A EP92202986A EP0538925B1 EP 0538925 B1 EP0538925 B1 EP 0538925B1 EP 92202986 A EP92202986 A EP 92202986A EP 92202986 A EP92202986 A EP 92202986A EP 0538925 B1 EP0538925 B1 EP 0538925B1
Authority
EP
European Patent Office
Prior art keywords
oven
tunnel
air
heat
jacket
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.)
Expired - Lifetime
Application number
EP92202986A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0538925A1 (en
Inventor
Pietro Di Bernardo
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.)
Interdibipack SpA
Original Assignee
Interdibipack SpA
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 Interdibipack SpA filed Critical Interdibipack SpA
Publication of EP0538925A1 publication Critical patent/EP0538925A1/en
Application granted granted Critical
Publication of EP0538925B1 publication Critical patent/EP0538925B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65B53/063—Tunnels

Definitions

  • This invention relates to an air-cooled oven intended particularly but not exclusively for packaging products with heat-shrinkable film.
  • These comprise a first stage in which the product is wrapped and possibly sealed in a film of heat-shrinkable material, and a second stage in which the product wrapped in the film is fed into a hot air circulation oven which shrinks the film onto the product or products to be packaged.
  • Ovens of this type consist structurally of a metal chamber or tunnel provided internally with electrical resistance elements for heating the air, which is circulated by one or more fans.
  • the product or products to be packaged are fed, wrapped in the film, through the tunnel by a roller or belt conveyor.
  • the temperature of the working environment in the vicinity of the oven can consequently become unbearable, and the oven can represent a source of danger to persons who accidentally touch its walls, by causing serious burns.
  • a further drawback of ovens of known type is that the conveyor rollers or belt extending through the tunnel are subjected to heating, with the result that the film wrapping the package tends to melt, hence sticking to the rollers and running down. This results in improper conveyor operation and an imperfect final package.
  • the main object of the present invention is to obviate the aforesaid drawbacks of the known art, this object being attained according to the invention by an oven, particularly for packaging products with heat-shrinkable film, having the features exposed in claim 1.
  • the dependent claims concern preferred embodiments of the oven.
  • the air-cooled oven consists structurally of a metal chamber or tunnel 10 mounted on a base frame 11 which rests on legs 12.
  • the base frame also carries a conveyor for passing the products to be packaged (not shown) through the tunnel 10, this tunnel in the illustrated embodiment consisting of a series of rollers 13 driven by a motor 14.
  • the tunnel 10 comprises an inner hot air circulation jacket 15 covered externally with a layer of insulating material 16, and an outer cold air circulation jacket 17.
  • the reference numeral 18 indicates a series of air-heating electrical resistance elements provided in the side of the inner jacket 15.
  • a motor 19 mounted on the top of the tunnel 10 drives a first fan 20 for hot air circulation, housed within the inner jacket 15, and a second fan 21 for cold air circulation, housed within the outer jacket 17.
  • said two fans are keyed onto the same exit shaft 22 of the motor 19.
  • the air heated within the inner jacket 15 by the electrical resistance elements 18 is fed by the fan 20 into the heated compartment 23 of the tunnel 10 through a series of apertures 24 provided in the side walls of the inner jacket 15.
  • the ventilation air is drawn in by the fan 21 through a series of apertures 25 provided in the roof of the tunnel 10, and is circulated through the outer jacket 17 in the directions indicated by the arrows 26, to be then discharged through a series of apertures 27 provided at the base of the tunnel in the frame 11, as clearly shown in Figures 2 and 3.
  • the ventilation air grazes the conveyor rollers 13, so maintaining them at a temperature such as to prevent the package film melting.
  • the outer wall of the tunnel 10 remains during its entire operating period always at a low non-dangerous temperature which has no effect on the surrounding environment, even if operation is continuous for several hours.
  • the ventilation air discharged through the apertures 27 can be piped to the outside of the working environment.
  • the air-cooled oven according to the invention can be constructed at minimum cost compared with an insulated oven, as it is necessary to merely provide the second fan 21 and the apertures 25, 27 for intake and discharge of ventilation air respectively. This is because the outer jacket 17 is already provided, it being necessary merely to increase its height to enable it to contain the fan 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vacuum Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Packages (AREA)
EP92202986A 1991-10-15 1992-09-29 Air-cooled oven, in particular for packaging products with heat-shrinkable film Expired - Lifetime EP0538925B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI912723A IT1251929B (it) 1991-10-15 1991-10-15 Forno raffreddato ad aria, in particolare per il confezionamento di prodotti con film termoretraibile.
ITMI912723 1991-10-15

Publications (2)

Publication Number Publication Date
EP0538925A1 EP0538925A1 (en) 1993-04-28
EP0538925B1 true EP0538925B1 (en) 1996-06-12

Family

ID=11360866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92202986A Expired - Lifetime EP0538925B1 (en) 1991-10-15 1992-09-29 Air-cooled oven, in particular for packaging products with heat-shrinkable film

Country Status (5)

Country Link
EP (1) EP0538925B1 (it)
DE (1) DE69211479T2 (it)
DK (1) DK0538925T3 (it)
ES (1) ES2091398T3 (it)
IT (1) IT1251929B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013141811A1 (en) * 2012-03-23 2013-09-26 Lijun Duan An open-style heat-shrink wrapping system for the protection of luggage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011052101B4 (de) * 2011-07-25 2023-10-05 Krones Aktiengesellschaft Schrumpfvorrichtung mit Gebindekühlung
DE102013101782A1 (de) * 2013-02-22 2014-08-28 Khs Gmbh Schrumpftunnelanlage sowie ein zugehöriges Verfahren zum Aufschrumpfen einer Schrumpffolie auf Packformationen
CN106586126A (zh) * 2016-11-17 2017-04-26 长兴向荣模具有限公司 一种新型热收缩膜包装设备
DE102020208108A1 (de) * 2020-06-30 2021-12-30 Krones Aktiengesellschaft Schrumpftunnel und Verfahren zum Aufschrumpfen von thermoplastischem Verpackungsmaterial
CN118405309A (zh) * 2024-07-02 2024-07-30 中策橡胶集团股份有限公司 一种轮胎封膜包装机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378989A (en) * 1965-02-24 1968-04-23 Doughboy Ind Inc Packaging machinery
AU1413566A (en) * 1966-11-18 1969-03-13 W. R. Grace Australia Packaging
US3744146A (en) * 1970-06-02 1973-07-10 Mill Eng Inc Shrink tunnel
DE3924871A1 (de) * 1989-07-27 1991-02-07 Dieter Kicherer Verfahren zum schrumpfen von folien sowie schrumpftunnel insbesondere zur durchfuehrung des verfahrens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013141811A1 (en) * 2012-03-23 2013-09-26 Lijun Duan An open-style heat-shrink wrapping system for the protection of luggage

Also Published As

Publication number Publication date
ITMI912723A1 (it) 1993-04-15
IT1251929B (it) 1995-05-27
DE69211479T2 (de) 1997-02-06
DK0538925T3 (da) 1996-10-28
EP0538925A1 (en) 1993-04-28
ES2091398T3 (es) 1996-11-01
ITMI912723A0 (it) 1991-10-15
DE69211479D1 (de) 1996-07-18

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