EP1472948A1 - Ofen für die Stabilisierung von Schuhoberteilen - Google Patents

Ofen für die Stabilisierung von Schuhoberteilen Download PDF

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Publication number
EP1472948A1
EP1472948A1 EP03425285A EP03425285A EP1472948A1 EP 1472948 A1 EP1472948 A1 EP 1472948A1 EP 03425285 A EP03425285 A EP 03425285A EP 03425285 A EP03425285 A EP 03425285A EP 1472948 A1 EP1472948 A1 EP 1472948A1
Authority
EP
European Patent Office
Prior art keywords
oven
conveyor belt
shoe
temperature
chamber
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Withdrawn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
EP03425285A
Other languages
English (en)
French (fr)
Inventor
Mario De Fulgentis
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.)
Officina Meccanica Bdf SpA
Original Assignee
Officina Meccanica Bdf 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 Officina Meccanica Bdf SpA filed Critical Officina Meccanica Bdf SpA
Priority to EP03425285A priority Critical patent/EP1472948A1/de
Publication of EP1472948A1 publication Critical patent/EP1472948A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D95/00—Shoe-finishing machines
    • A43D95/12—Devices for conditioning, tempering, or moistening
    • A43D95/125—Devices for conditioning, tempering, or moistening with means, e.g. transport chains, for continuously transferring shoes through the devices
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D95/00—Shoe-finishing machines
    • A43D95/10—Drying or heating devices for shoes

Definitions

  • the present invention relates to an oven for the stabilisation of shoe uppers mounted on lasts, and in particular to an oven for the stabilisation of shoes of the type in which uppers are glued to insoles.
  • oven stabilisation is a step in the shoe manufacturing process during which the upper, already mounted on a last and fixed to the insole, undergoes thermal treatment. Such treatment causes the release, in a relatively short time, of the internal stresses of the upper resulting from its being mounted on the last and allows therefore the permanent moulding of the upper itself, so that the inner last can be removed during subsequent manufacturing steps.
  • Shoe stabilisation normally takes place in hot-air ovens, through which the last-mounted shoes are conveyed on suitable conveyor belts.
  • the hot air temperature inside the oven which is generally between 70° and 200°C, is adjusted according to the oven length, the transit speed of shoes inside the oven, the type of leather, and the degree of humidity of the heating air.
  • the stabilisation process is the more speedy and effective, the higher the treating temperature within the oven, obviously taking into consideration the upper temperature limits imposed by the different types of leather or shoes. There is therefore an economic interest in devising high-temperature stabilisation processes that can reduce the overall shoe manufacturing time.
  • the ungluing of the shoe upper from the insole is of course an absolutely injurious event for the shoe manufacturing process, both when it affects the whole shoe upper and is therefore immediately visible to the operative, and when it affects only a single portion, even a limited one, of the shoe upper, and is therefore less easily detectable. In the former case, this causes a disruption to the production line, meaning that it will be necessary to manually recycle shoes that have been found defective sending them back to the gluing step, and a general slowing down of production.
  • the object of the present invention is therefore to offer an improved oven for the stabilisation of shoe uppers which is free from the drawbacks described above.
  • Such an oven would allow the treatment of shoes at temperatures higher than those so far thought possible in traditional ovens, because of the ungluing of shoe uppers, and would prevent such a phenomenon from occurring.
  • said cooling system comprises a chamber in which a cooling liquid is circulated, said chamber being the supporting surface of the conveyor belt.
  • the above said cooling liquid is preferably air.
  • the conveyor belt is manufactured with a low thermal conductivity material, such as a fibre material.
  • the belt is of a mesh-type or made of an open-weave fabric and the chamber which makes up its supporting surface is drilled so that cooling air can circulate through said belt and cool the bottom part of the shoe uppers mounted on lasts and resting on the belt.
  • the general design of the shoe stabilisation oven according to the present invention can be seen clearly in fig. 1 and comprises mainly the following elements, which are already present in stabilisation ovens of known design: a centrifugal fan V which blows into the oven the hot air produced in a heat exchanger (not shown); a hot air plenum box P connected to the outlet of fan V by a main pipe A; a member of secondary pipes C which connect the plenum box P to hot air flow distributors D, which are positioned all along the oven chamber F; two conveyor belts for the last-mounted uppers (located in the space between pipes C in fig.
  • the oven for the stabilisation of shoe uppers comprises a cooling system for the bottom part of the last-mounted uppers to be stabilised. Thanks to this, during their crossing of the oven, said bottom part, which is precisely the one where the gluing between upper and insole has taken place, is maintained within a temperature range distinctively lower than the operating temperature of the oven, which temperature will reach instead the rest of the shoe upper, as desired.
  • a special cooling system for the bottom part of last-mounted shoe uppers is shown in the drawings as an example. Such system should obviously not be interpreted as limiting the scope of the invention, as the desired cooling can be obtained with equivalent systems, too, regardless of the fact that the cooling liquid is a liquid or a gas.
  • the cooling system described here runs along the whole forward branch of the two conveyor belts and can employ either conductive-type, or mixed-type (conductive and convective) cooling.
  • the system comprises a fan 1 which draws room temperature air, or air which has previously been cooled by a suitable cooling device, and blows it, by means of a main pipe 2 and secondary pipes 3, into two fairly low-hight cooling chambers 4, each of which runs along the whole area occupied by a relative conveyor belt, within oven chamber F, and whose top wall acts as supporting surface of said conveyor belt.
  • the upper surface of chambers 4 is provided with a series of holes (not shown in the drawings) which are evenly distributed over the whole surface thereof. This allows the air blown from pipes 3 into chambers 4 to come out of said holes and cool directly the bottom part of the last-mounted shoe uppers resting on said belt where it mixes with the hot air in the oven.
  • the cooling air of course cools down the conveyor belt in the areas where it is not covered by the lasts, too, so preventing it from overheating due to the hot air jets coming from the distributors. Indirect heating of the shoe uppers by heat conduction through the belt (which is a particularly pressing problem when the belt is made of mesh) is also avoided.
  • cooling chambers 4 In a second embodiment of cooling chambers 4, which is instead suitable for use with conveyor belts made of continuous materials, the upper surface of chambers 4 is closed and the cooling air let into them from pipes 3 comes out from the opposite ends of chambers 4 through vents 5 located in their side walls, directly outside the oven chamber F.
  • cooling of the bottom part of last-mounted shoe uppers occurs exclusively by conduction, through the conveyor belt.
  • the conveyor belt is, in fact, generally cooled thanks to its continuous contact with the cooled surface of chamber 4 and this in turn prevents the temperature of the bottom part of the last-mounted shoe uppers resting on the belt from rising over the desired level.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP03425285A 2003-05-02 2003-05-02 Ofen für die Stabilisierung von Schuhoberteilen Withdrawn EP1472948A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03425285A EP1472948A1 (de) 2003-05-02 2003-05-02 Ofen für die Stabilisierung von Schuhoberteilen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03425285A EP1472948A1 (de) 2003-05-02 2003-05-02 Ofen für die Stabilisierung von Schuhoberteilen

Publications (1)

Publication Number Publication Date
EP1472948A1 true EP1472948A1 (de) 2004-11-03

Family

ID=32982041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425285A Withdrawn EP1472948A1 (de) 2003-05-02 2003-05-02 Ofen für die Stabilisierung von Schuhoberteilen

Country Status (1)

Country Link
EP (1) EP1472948A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102008156A (zh) * 2010-10-29 2011-04-13 兰顺辉 前段蒸软烘干机
WO2014062808A1 (en) * 2012-10-19 2014-04-24 Nike International Ltd. Energy efficient infrared oven

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE276521C (de) *
DE1180275B (de) * 1960-05-25 1964-10-22 Svit Np In der Massenfertigung von Schuhen verwendbarer Gliederkettenfoerderer mit Heizeinrichtungen
GB1472647A (en) * 1975-10-30 1977-05-04 Salient Eng Ltd Finishing treatments for footwear
EP0512526A1 (de) * 1991-05-08 1992-11-11 IRON FOX S.r.L. Automatisierte, integrierte und werkzeugausgestattete Fertigungsstrasse zum Herstellen, insbesondere zum Kleben von Schuhen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE276521C (de) *
DE1180275B (de) * 1960-05-25 1964-10-22 Svit Np In der Massenfertigung von Schuhen verwendbarer Gliederkettenfoerderer mit Heizeinrichtungen
GB1472647A (en) * 1975-10-30 1977-05-04 Salient Eng Ltd Finishing treatments for footwear
EP0512526A1 (de) * 1991-05-08 1992-11-11 IRON FOX S.r.L. Automatisierte, integrierte und werkzeugausgestattete Fertigungsstrasse zum Herstellen, insbesondere zum Kleben von Schuhen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102008156A (zh) * 2010-10-29 2011-04-13 兰顺辉 前段蒸软烘干机
WO2014062808A1 (en) * 2012-10-19 2014-04-24 Nike International Ltd. Energy efficient infrared oven
CN104718421A (zh) * 2012-10-19 2015-06-17 耐克创新有限合伙公司 节能红外烤箱
US9945610B2 (en) 2012-10-19 2018-04-17 Nike, Inc. Energy efficient infrared oven

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