EP0136654A2 - Tunnel de rétrécissement - Google Patents

Tunnel de rétrécissement Download PDF

Info

Publication number
EP0136654A2
EP0136654A2 EP84111455A EP84111455A EP0136654A2 EP 0136654 A2 EP0136654 A2 EP 0136654A2 EP 84111455 A EP84111455 A EP 84111455A EP 84111455 A EP84111455 A EP 84111455A EP 0136654 A2 EP0136654 A2 EP 0136654A2
Authority
EP
European Patent Office
Prior art keywords
fan
shrink tunnel
shrink
tunnel according
nozzle
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.)
Granted
Application number
EP84111455A
Other languages
German (de)
English (en)
Other versions
EP0136654B1 (fr
EP0136654A3 (en
Inventor
Karl-Heinz Kallfass
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.)
KALLFASS VERPACKUNGSMASCHINEN GmbH
Original Assignee
KALLFASS VERPACKUNGSMASCHINEN GmbH
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 KALLFASS VERPACKUNGSMASCHINEN GmbH filed Critical KALLFASS VERPACKUNGSMASCHINEN GmbH
Priority to AT84111455T priority Critical patent/ATE31515T1/de
Publication of EP0136654A2 publication Critical patent/EP0136654A2/fr
Publication of EP0136654A3 publication Critical patent/EP0136654A3/de
Application granted granted Critical
Publication of EP0136654B1 publication Critical patent/EP0136654B1/fr
Expired 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

  • the invention relates to a shrink tunnel according to the preamble of claim 1.
  • DE-OS 19 45 047 of the applicant provides a portal-like air guidance duct inserted into the tunnel cover, through which a conveying device extends and which has numerous adjustable openings on its circumference is through the air.
  • the air is recirculated to the portal in the transport direction at the front and rear.
  • the hot air is supplied via a fan under the transport device with an upstream boiler room with U-shaped tubular heaters.
  • Similar arrangements, also with overhead fan and air supply only from below or from above and below through numerous slots, have become known from US Pat. Nos. 3,389,478 and 3,430,358.
  • DE-OS 1 511 562 also describes such an arrangement.
  • the aim is to be able to design the air duct so that the shrink film shrinks as evenly as possible around the object to be packaged, with as many individual inlet openings which are as adjustable as possible, with an air duct which preferred the struck the packaging object in the respective area as vertically as possible so as not to cause any displacement of the film during the shrinking on the object due to the flow of air.
  • the object of the invention is to provide a shrink tunnel which enables a good and uniform shrinking effect with simplified air guidance.
  • the ring nozzle could also be square or rectangular, it is preferably circular and the return flow opening lies centrally therein. This results in ideal flow conditions.
  • the ring nozzle is provided with an axial alignment with the fan wheel of the fan on the outer circumference of the outlet guide channel of the fan wheel designed as a radial fan, preferably arranged within the shrink tunnel, and the return flow opening is preferably directly the fan suction opening.
  • the fan is thus arranged within the shrink tunnel, and the ring nozzle and the backflow opening are part of the outlet guide duct.
  • Heaters designed as electric tubular heaters can be arranged in the outlet guide channel, which are preferably arranged as meandering, zigzag or undulating circular or spiral sections around the fan wheel.
  • the housing parts delimiting the annular nozzle which form the fan housing, consist of two shell-shaped sheet-metal parts arranged one inside the other, of which the inner contains the preferably flow-shaped or nozzle-shaped return flow opening. Except for the housing parts directly belonging to the fan, namely the outlet guide duct and the central suction opening, no air duct ducts are required. In addition, the entire unit is arranged within the actual tunnel walls, so that they can be used for pure insulation. This results in considerable savings in production and, above all, energy savings in operation, because the mass to be heated is also very small and there is no need to heat or isolate air duct parts located outside the shrink tunnel. This means that heating to operating temperature is possible in some cases in a third of the previous time.
  • the ring nozzle advantageously has a large nozzle cross section for low air speeds.
  • the fan with its fan housing containing the ring nozzle, backflow opening and heating and a possibly insulated base part and the fan motor arranged on the outside of the base part, can preferably form a structural unit, the base part preferably being insertable in an opening of the shrink tunnel wall.
  • the air leaving a radial fan has a peripheral speed component, it is usually ensured in radial fans that the component is designed appropriately for the outlet guide channel, in particular with guide vanes, that this component is canceled.
  • the guide vanes in the heating or annular nozzle area, as a result of which the annular nozzle would be subdivided into small individual chambers one behind the other, the embodiment in which the outlet guide channel is designed without guide vanes is preferred. It has been found that the peripheral component of the flow improves the heat transfer between the hot air and the shrink film without undesirable turbulence occurring.
  • An embodiment is particularly preferred in which at least one ring nozzle arrangement is provided on the upper shrink tunnel wall.
  • This air duct with a warm air curtain running downwards is particularly advantageous.
  • an arrangement with two opposing lateral ring nozzles can be provided for predominantly vertical objects, for example in rows of bottles, while with a preferred shrinkage in the lower region an annular nozzle would have to be arranged below the air-permeable conveyor.
  • the length of the shrink tunnel with only one ring nozzle to provide unit but could also be arranged in series for several applications several ring nozzle units.
  • the inner housing part at its inner edge, which borders the return flow opening and adjoins the annular bulge, cooperates with an annular rim of the fan wheel to form a gap which is connected to the part of the outlet guide duct which is within the recess, a den is formed within the outlet guide duct Efficiency of the fan increasing backflow, for which no additional measures are necessary due to the favorable design of the fan housing described.
  • the arrangement of the heater meets ideal heat transfer conditions directly on the outer circumference of the fan blades and can therefore work with low surface temperatures despite a high relative heating surface load. Due to their design as a meandering arch or circle, the heaters lie like a grille in front of the outlet of the radial fan wheel and are flowed across for best heat transfer.
  • the shrink tunnel 11 shown is used for the heat treatment of a shrink film, i.e. a pre-stretched film that shrinks to a large extent under heat treatment and tightly encloses objects to be packaged, not shown.
  • the shrink tunnel 11 has a rectangular housing in the form of a box with inlet and outlet openings 41, which are closed by flexible curtains 42.
  • a transport device 17 Through the shrink tunnel interior 16, the objects are conveyed on a transport device 17, which can consist, for example, of bars guided on both sides on circulating chains.
  • the housing 12 of the shrink tunnel consists of an outer housing 13 and an inner housing 14 with insulation 15 interposed therebetween, which, apart from an area to be explained on the top 19 of the housing, encloses the entire tunnel.
  • a hot air flow is maintained in the tunnel interior 16 by a hot air unit 20 which has a fan 21 which contains the fan wheel 22 of a radial fan which has a lower middle suction opening and radial blades 23 arranged on the outer circumference.
  • the vertical fan shaft 25 is driven by a fan motor 24.
  • the motor 24 is mounted on a base plate 38 which is connected to the outer housing part 27 of a fan housing 26 via stud bolts 39. Insulation 15 is also inserted between the base plate and the outer housing part.
  • the outer housing part 27 has the shape of an inverse plate or bowl made of sheet metal.
  • An inner housing part 28 is arranged in it, which also consists of deformed sheet metal and has a somewhat flatter bowl shape, which has a bulge 31 that bulges downward in the middle, the inner edge of which delimits a central backflow opening 32.
  • This housing part thus has the shape of a rotating body, the cross-sectional area of which is approximately S-shaped.
  • the two housing parts 27, 28 are also connected to one another via stud bolts 37 and accommodate the fan wheel 22 in such a way that the space enclosed between them forms the outlet guide duct 35 of the fan.
  • heaters 36 are arranged, which consist of electric tubular heaters which are bent in the form of a wave band, which in turn is bent into a circular arc or spiral section shape, so that they are arranged around the circumference of the fan wheel and directly from that Any air escaping from the fan wheel can be flown across.
  • the outlet guide channel 35 which is relatively wide in this area, narrows as it follows the circular shape of the two housing parts to form an annular nozzle 30, the annular outlet opening of which directs the flow vertically.
  • the flow channel between the outlet guide channel 35 and the ring nozzle thus has the shape of a nozzle which narrows and deflects by 90 ° at the same time, but which rotates in a ring around the entire fan housing.
  • the fan housing 26 takes up a very important part, namely the largest part, of an inner tunnel wall, namely the upper wall 19. In the transverse direction, it almost reaches the side walls 18, while in the longitudinal direction it is not too far from the inlet and outlet openings 41.
  • the ring nozzle thus comprises a substantial part of a tunnel wall surface, so that in the example shown the entire tunnel interior 16 is covered by its flow. Even in the case of the arrangement of several ring nozzles, they are arranged in such a way that they essentially maintain their own flow pattern in the sense of an almost closed system, i.e.
  • Each ring nozzle is assigned its own return flow opening, and there is advantageously only a relatively small amount of air exchange between the flow systems of the individual hot air units, and this would also make it possible to set different speeds and / or temperatures for multiple hot air units in the same shrink tunnel.
  • the regulation can be carried out very easily via the speed of the motor 24 and / or a stepless, stepped or clocked regulation of the electrical heating.
  • temperature sensors can be arranged in the outlet guide channel.
  • the entire fan 21 with motor and fan wheel, the fan housing 26 and the base plate 38, including the insulation, forms a functional, preassembled structural unit which can be inserted from below into a cutout 46 provided in the upper tunnel wall 19, because the base plate 38 is screwed onto protruding outer wall sections 47.
  • the base plate with the interposed insulation and the outer fan housing part then forms a circular part of the insulated outer wall, which is only interrupted by the guide tube for the fan shaft 25.
  • the shrink tunnel can therefore be completely double-walled.
  • the upper housing part of the shrink tunnel can normally be removed in order to be able to service the transport device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Processing Of Terminals (AREA)
  • Radiation-Therapy Devices (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP84111455A 1983-10-01 1984-09-26 Tunnel de rétrécissement Expired EP0136654B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111455T ATE31515T1 (de) 1983-10-01 1984-09-26 Schrumpftunnel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3335790A DE3335790A1 (de) 1983-10-01 1983-10-01 Schrumpftunnel
DE3335790 1983-10-01

Publications (3)

Publication Number Publication Date
EP0136654A2 true EP0136654A2 (fr) 1985-04-10
EP0136654A3 EP0136654A3 (en) 1985-05-08
EP0136654B1 EP0136654B1 (fr) 1987-12-23

Family

ID=6210753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111455A Expired EP0136654B1 (fr) 1983-10-01 1984-09-26 Tunnel de rétrécissement

Country Status (5)

Country Link
US (1) US4597193A (fr)
EP (1) EP0136654B1 (fr)
JP (1) JPS6090116A (fr)
AT (1) ATE31515T1 (fr)
DE (2) DE3335790A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0466525A1 (fr) * 1990-12-07 1992-01-15 Balair Systems Limited Procédé et dispositif pour l'emballage de produits
RU2488529C1 (ru) * 2011-12-19 2013-07-27 Общество с ограниченной ответственностью "Торговый дом "Пакверк" Способ нагрева термоусадочной пленки в термотоннеле упаковочной линии
CN108750221A (zh) * 2018-06-04 2018-11-06 华联机械集团有限公司 一种新型的热收缩机加热装置
CN113532033A (zh) * 2021-06-07 2021-10-22 李荣庆 一种绝缘陶瓷均匀上色烘干设备

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3632448A1 (de) * 1986-09-24 1988-04-07 Pharma Rechenzentrum Gmbh Verfahren zur rechnergesteuerten zusammenstellung von verschiedenen artikeln von auftraegen und vorrichtung zur durchfuehrung des verfahrens
JPS63190010U (fr) * 1987-05-27 1988-12-07
GB2246110B (en) * 1990-12-07 1995-02-15 Balair Systems Ltd Method and apparatus for the packaging of products
US5899048A (en) * 1993-09-23 1999-05-04 W.R. Grace & Co.-Conn. Shrink tunnel
DE19920057A1 (de) * 1999-05-03 2000-11-09 Kallfass Gmbh Verfahren und Vorrichtung zur Verpackung von Gegenständen in Schrumpffolie
US6623352B2 (en) * 1999-05-21 2003-09-23 Vortex Holding Company Vortex air barrier
FR2821285B1 (fr) * 2001-02-23 2003-11-28 Saint Gobain Seva Dispositif de soufflage d'un fluide sur au moins une face d'un element mince, et unite de soufflage associe
USD481049S1 (en) 2002-09-12 2003-10-21 Lantech Management Corp. And Lantech Holding Corp. Shrink wrap tunnel
US6772575B2 (en) 2002-12-30 2004-08-10 Lantech Management Corp. And Lantech Holding Corp. Shrink wrap apparatus and method of shrink wrapping products
US6744976B1 (en) * 2003-02-06 2004-06-01 Benison & Co., Ltd. Hot airflow generation device
US7297904B2 (en) * 2003-09-18 2007-11-20 Premark Feg Llc Convection oven and related air flow system
US8051630B2 (en) * 2005-04-19 2011-11-08 Multivac Sepp Haggenmueller Gmbh & Co. Kg Device for shrinking packagings
DE102008019774A1 (de) 2008-04-18 2009-10-29 Beck Packautomaten Gmbh & Co. Kg Schrumpftunnel
DE102009003575A1 (de) * 2009-03-06 2010-09-09 Krones Ag Vorrichtung und Verfahren zur Wärmebehandlung von Verpackungsgütern
NL2006752C2 (en) * 2011-05-10 2012-11-13 Fuji Seal Europe Bv Apparatus and method for heat shrinking a film wrapping an object.
CN105637225B (zh) * 2013-07-19 2017-10-13 南洋理工大学 通风设备
EP3274146B1 (fr) * 2015-03-25 2021-11-03 Corning Incorporated Systèmes et procédés de séchage de la peau d'un objet en céramique cellulaire
BE1023137B9 (nl) * 2015-05-27 2016-12-08 Mivas Vzw Inrichting voor het verpakken van een product in een krimpfolie.
JP2020041737A (ja) * 2018-09-10 2020-03-19 光洋サーモシステム株式会社 熱処理装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1002980A (en) * 1963-02-12 1965-09-02 Grace W R & Co A method and apparatus for heat shrinking packaging film
US3378989A (en) * 1965-02-24 1968-04-23 Doughboy Ind Inc Packaging machinery
US3389478A (en) * 1966-03-03 1968-06-25 Anderson Electric Corp Apparatus for thermally conditioning articles and the like
AU1413566A (en) * 1966-11-18 1969-03-13 W. R. Grace Australia Packaging
US3430358A (en) * 1967-01-30 1969-03-04 Doughboy Ind Inc Shrink tunnel with conveyer and air directing means
DE6801652U (de) * 1968-10-10 1969-01-23 Nuetro Hirsch & Co Vorrichtung zum verpacken von stueckguetern auf einem grundrahmen
DE1945047A1 (de) * 1969-09-05 1971-04-01 Kallfass Karl Heinz Schrumpftunnel zur Waermebehandlung von mit Schrumpffolie umgebenen Guetern
NO127044C (fr) * 1971-02-10 1975-04-22 Fernholt & Giertsen
SE450912B (sv) * 1981-02-19 1987-08-10 Nobuyoshi Kuboyama Forfarande och apparat for att astadkomma luftcirkulation och konvektion i en vermealstrande anordning

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0466525A1 (fr) * 1990-12-07 1992-01-15 Balair Systems Limited Procédé et dispositif pour l'emballage de produits
RU2488529C1 (ru) * 2011-12-19 2013-07-27 Общество с ограниченной ответственностью "Торговый дом "Пакверк" Способ нагрева термоусадочной пленки в термотоннеле упаковочной линии
CN108750221A (zh) * 2018-06-04 2018-11-06 华联机械集团有限公司 一种新型的热收缩机加热装置
CN113532033A (zh) * 2021-06-07 2021-10-22 李荣庆 一种绝缘陶瓷均匀上色烘干设备

Also Published As

Publication number Publication date
JPS6090116A (ja) 1985-05-21
EP0136654B1 (fr) 1987-12-23
DE3335790A1 (de) 1985-04-18
ATE31515T1 (de) 1988-01-15
US4597193A (en) 1986-07-01
DE3468200D1 (en) 1988-02-04
EP0136654A3 (en) 1985-05-08

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