EP0436600A1 - Procede et dispositif d'etirage du cuir. - Google Patents

Procede et dispositif d'etirage du cuir.

Info

Publication number
EP0436600A1
EP0436600A1 EP19890910848 EP89910848A EP0436600A1 EP 0436600 A1 EP0436600 A1 EP 0436600A1 EP 19890910848 EP19890910848 EP 19890910848 EP 89910848 A EP89910848 A EP 89910848A EP 0436600 A1 EP0436600 A1 EP 0436600A1
Authority
EP
European Patent Office
Prior art keywords
leather
stretching
membrane
piece
surface layer
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
EP19890910848
Other languages
German (de)
English (en)
Other versions
EP0436600B1 (fr
Inventor
Jiri Dipl Ing Dokoupil
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.)
DOKOUPIL, JIRI
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT89910848T priority Critical patent/ATE90396T1/de
Publication of EP0436600A1 publication Critical patent/EP0436600A1/fr
Application granted granted Critical
Publication of EP0436600B1 publication Critical patent/EP0436600B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/26—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/58—Drying

Definitions

  • the invention relates to a method for stretching leather and similar flat materials, e.g. Skins, furs, but possibly also foil cuts and the like.
  • the piece of leather is brought to rest on a support surface which is easy on the leather to slide on; b) the leather piece is acted upon with at least a part of the support surface distributed in the direction against the support surface acting pressure forces; c) for stretching the leather under sliding relative to the support surface, at least approximately tangentially with respect to a leather surface and at least approximately all-sided stretching forces directed towards the edge of the leather piece are brought into effect on at least part of the second surface of the leather piece.
  • the invention is concerned with the implementation of further processing functions on the leather in connection with the stretch processing. This includes the combination of the
  • Stretching process with heating which among other things can also be used to improve the stretching results.
  • the invention comprises as a further essential subject the combination of the stretching process with a
  • Another object of the invention is to provide a
  • Stretching device for leather and the like which is particularly suitable for carrying out the method according to the invention.
  • the solution to this problem is determined by the following features; a) it is a carrying device for receiving the spread leather with one with respect to the first
  • a stretching device is provided with at least one pressing and stretching tool arranged opposite the contact surface and attacking the leather.
  • the sliding ability of the contact surface is advantageously achieved with the help of a structure or a coating made of a plastic with a self-lubricating surface, e.g. Tetrafluoroethylene.
  • a continuation of the task of the invention is directed towards the creation of a combined stretching and heat treatment device for flat material such as leather and the like.
  • the inventive solution to this problem is determined in a stretching device of the aforementioned type by providing a heating device that is operatively connected to the leather being processed. This means that not only combined treatment tasks can be solved efficiently in one machine and saving on handling and work steps, but in some cases in particular the permanent one
  • Such a treatment device is preferably carried out in such a way that the support member forming the support surface consists at least partially of highly heat-conducting material, preferably metal, and is operatively connected to a conduction or convection heating device.
  • a particularly important continuation of the task of the invention also aims at a combination of different work functions, namely that of stretching with drying.
  • the associated solution is determined by the fact that a gap space accommodating the leather piece is formed between the support surface and the stretching tool and is connected to a suction device.
  • a gap space accommodating the leather piece is formed between the support surface and the stretching tool and is connected to a suction device.
  • FIG. 1 shows an overall side view of an inventive
  • FIG. 3 shows a partial vertical section in an edge region of a
  • Membrane stretching tool with suction device and a supporting element with heating device, within a stretch drying machine on a larger scale
  • FIG. 4 shows a partial vertical section corresponding to FIG. 3, but with a modified design of the stretching tool and the support member
  • FIG. 5 again shows a partial vertical section corresponding to FIG. 3 for a membrane stretching tool and provided with a special work surface structure
  • Stretch drying machine with modified carrying device In the stretching machine according to FIG. 1, there is an overall plate-shaped and arranged along a horizontal plane
  • a stroke-lowering direction HS indicated for the sake of simplicity as a piston-cylinder arrangement, allows the stretching device to be adjusted between the raised rest position shown in FIG. 1 and a lowered working position.
  • a piece of leather (hereinafter referred to as "skin") L is spread with its first (lower) surface L1 on the support surface AF of a carrying device TRV1, which is highly slidable relative to the leather.
  • the stretching device STV1 In the lowered working position of the stretching device STV1, the underlying work surface AO of a pressure and stretching tool ASW enters with the second
  • An essential component of the pressure and stretching tool ASW is an elastic stretchable membrane M1 covering the skin, which can be erected by means of a stretching drive device DAV maintenance of the pressure forces Pa in the normal direction to your
  • the Dehn drive device DAV comprises a plurality of piston-cylinder units DZ arranged parallel to the membrane plane and distributed over the membrane circumference, the piston rods of which are fastened with rod heads SK edge of the membrane.
  • Such an arrangement is known per se from DE-OS 30 10 003 and therefore requires no further illustration and explanation here.
  • the pressure forces Pa are - as also known per se from the aforementioned DE-OS - generated by means of negative pressure in a gap SP receiving the skin.
  • This gap is formed between the contact surface AF on the one hand and the working surface AO of the membrane M1 on the other.
  • a bead-like soft body seal DR running continuously along the circumference of the membrane M1 is provided, which bears sealingly on the contact surface AF.
  • a conduction heating device HV is arranged on the underside of the support member TO1, e.g. in the
  • Supporting element is made considerably easier or even made possible because, on the one hand, in the area of rigid solids - in contrast to the soft-flexible materials required for a membrane, suitable thermal conductivity values and heat transfer values are available and, on the other hand, there is no need to consider expansion properties. So overall an intense
  • thermal connection between the heater and the leather can be achieved.
  • a convection heater may also be used.
  • a gaseous heating medium is circulated through the gap accommodating the leather.
  • FIG. 3 Another step in the invention leads - as also shown in FIG. 3 - to a stretch-drying device.
  • the gap SP is connected to a suction device SV, which enables the evaporated leather moisture to be removed quickly.
  • the connection between the suction device SV and the gap SP is established by a manifold SR with a plurality of tubular, flexible branch lines ZL and via associated connections AS and a channel system KS of the membrane M1.
  • this channel system is designed as a relief structure RS which is open in the region of the working surface AO of the membrane and has a planar network of channel-shaped depressions KV, indicated here in cross section. This results in an evenly distributed suction and steam discharge.
  • the support member TO is provided with a surface layer OST which forms the contact surface AF and is made of material which is highly slidable with respect to the leather.
  • the surface layer preferably consists of a highly slidable plastic, in particular tetrafluoroethylene.
  • the surface layer can also be provided with a fiber reinforcement. This favors a substantial further training of the surface layer
  • OSM provided a pressure sensitive adhesive layer.
  • a permeable membrane M2 with connection to a suction device is similar to FIG. 3
  • Working surface AO has a pore structure PS which is open and permeable to the leather surface and which is connected to a suction device via passages DL and connections AS.
  • the pore structure is contained in an elastically stretchable membrane surface layer OSM, which is releasably connected to a membrane base body GKM, to be precise - as with the support organ surface layer OST - by means of an adhesive layer HK.
  • a Velcro fastener arrangement KV may also be used, as shown in FIG. 5 - there for example without a permeable membrane structure and suction device - for the detachable fastening of a surface layer provided with toothing-like structure Z is indicated in the area of the membrane working surface AO.
  • Such a surface structure enables a positive transfer of the stretching forces to the leather and thus a particularly intensive stretching effect.
  • the carrying device and thus the bearing surface are enlarged here - indicated in the example on one side - beyond the floor plan of the stretching device STV. This allows the application of a skin in a freely accessible area next to the stretching device and during the processing of another skin, as well as the silky, rapid transport of the skin placed on the work area. This means a considerable advance in rationalization.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'étirage du cuir et des matériaux similaires au moyen de deux membranes élastiques pressées l'une contre l'autre par dépression et mutuellement étanches en leur extrémité et l'allongement des deux membranes avec entraînement par frottement du cuir tendu entre ces membranes nécessitent que chaque membrane comporte un dispositif d'allongement à action répartie sur l'extrémité de la membrane. L'invention a par ailleurs pour objet l'établissement d'un procédé d'étirage permettant d'obtenir un résultat de même qualité sans l'opération relativement difficile d'allongement des deux surfaces du cuir. L'invention permet d'atteindre cet objectif grâce aux caractéristiques suivantes: a) une partie au moins d'une première surface d'une pièce de cuir est disposée sur une surface d'appui assurant au cuir un glissement suffisant; b) la pièce de cuir est soumise à des forces de pression distribuées sur une partie au moins de la surface d'appui et s'exerçant dans la direction opposée à cette surface; c) pour l'étirage du cuir avec un glissement par rapport à la surface d'appui, on applique des forces d'étirement s'exerçant sur une partie au moins de la deuxième surface de la pièce de cuir et appliquées de manière au moins approximativement tangentielle par rapport à une surface du cuir et au moins approximativement sur tous les côtés vers l'extrémité de la pièce de cuir.
EP89910848A 1988-09-29 1989-08-25 Procede et dispositif d'etirage du cuir Expired - Lifetime EP0436600B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89910848T ATE90396T1 (de) 1988-09-29 1989-08-25 Verfahren und einrichtung zum strecken von leder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3833068A DE3833068A1 (de) 1988-09-29 1988-09-29 Verfahren und einrichtung zum strecken von leder
DE3833068 1988-09-29

Publications (2)

Publication Number Publication Date
EP0436600A1 true EP0436600A1 (fr) 1991-07-17
EP0436600B1 EP0436600B1 (fr) 1993-06-09

Family

ID=6363978

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89910848A Expired - Lifetime EP0436600B1 (fr) 1988-09-29 1989-08-25 Procede et dispositif d'etirage du cuir
EP89202523A Expired - Lifetime EP0365068B1 (fr) 1988-09-29 1989-08-25 Procédé et dispositif pour l'étendage du cuir

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP89202523A Expired - Lifetime EP0365068B1 (fr) 1988-09-29 1989-08-25 Procédé et dispositif pour l'étendage du cuir

Country Status (12)

Country Link
EP (2) EP0436600B1 (fr)
JP (1) JPH04500979A (fr)
KR (1) KR900702055A (fr)
CN (1) CN1020474C (fr)
BR (1) BR8907630A (fr)
CZ (1) CZ281561B6 (fr)
DE (1) DE3833068A1 (fr)
ES (1) ES2037402T3 (fr)
GR (1) GR3007294T3 (fr)
PT (1) PT91831B (fr)
WO (1) WO1990003448A1 (fr)
YU (1) YU189189A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3928095A1 (de) * 1989-08-25 1991-02-28 Dynavac Gmbh Verfahren und einrichtung zum bearbeiten von weichflexiblen flachmaterialstuecken
DE4131262A1 (de) * 1991-09-20 1993-04-01 Dokoupil Jiri Elastische membrane zur streckung und trocknung von leder
AUPO598197A0 (en) * 1997-04-03 1997-05-01 Future Tan Pty Ltd Treatment of hides
AUPO871397A0 (en) 1997-08-22 1997-09-18 Future Tan Pty Ltd Improved treatment of hides
DE19826181A1 (de) * 1998-06-14 1999-12-16 Bohumil Stupecky Vorrichtung zum Schlicken, Strecken und Trocknen von Leder und ähnlichen Flachmaterialien wie Fellen, Pelzen u. dgl.
ITVI20010220A1 (it) * 2001-10-23 2003-04-23 Cartigliano Off Spa Metodo e linea per l'allargamento continuo di pelli ed altri prodottisimilari
DK177012B1 (da) * 2003-09-19 2010-12-06 Dansk Mink Papir As Fremgangsmåde og tanemaskine til ikke-destruktiv udstrækning og fastgørelse (taning) af skind på et udspilningselement/tane
CN101830424B (zh) * 2010-04-30 2011-11-23 重庆平伟科技(集团)有限公司 一种实现连续生产的真空吸附成型方法
CN102492784B (zh) * 2011-12-30 2015-02-04 福建宝利特集团有限公司 真空吸花打样机
CN106435049A (zh) * 2016-10-24 2017-02-22 南通思瑞机器制造有限公司 一种真空干燥机展皮机构
CN107287364B (zh) * 2017-08-22 2019-05-28 何招弟 一种鹿皮缓慢风干及鹿皮拉扯两用装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE510128C (de) * 1929-01-23 1930-10-16 Walter Degel Spannvorrichtung fuer Felle, Haeute und Rohleder
GB950138A (en) * 1961-02-18 1964-02-19 Luigi Turato Process and apparatus for stretching and vacuum drying of wet dressed and/or coloured hides
DE1296736B (de) * 1962-02-09 1969-06-04 Cartigliano Off Spa Vakuumtrockenvorrichtung fuer Leder od. dgl.
FR1407169A (fr) * 1964-06-16 1965-07-30 Vide Soc Gen Du Perfectionnements aux dispositifs de séchage
ES391909A1 (es) * 1970-06-15 1973-07-01 Mascrinenfabrik Turner A G Procedimiento e instalacion para el planchado de enero.
DE3010003C2 (de) * 1980-03-15 1986-02-13 Jiří Dipl-Ing. 6251 Gückingen Dokoupil Verfahren und Vorrichtung zur Flächenvergrößerung und -trocknung von Lederstücken, Fellen und ähnlichen Materialien
DE3431353A1 (de) * 1984-08-25 1986-03-06 Helmuth 2058 Lauenburg Schmoock Verfahren und vorrichtung zum vergroessern von flaechenerstreckungen eines dehnbaren materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9003448A1 *

Also Published As

Publication number Publication date
YU189189A (en) 1990-12-31
BR8907630A (pt) 1991-07-30
CN1020474C (zh) 1993-05-05
ES2037402T3 (es) 1993-06-16
JPH04500979A (ja) 1992-02-20
KR900702055A (ko) 1990-12-05
CZ281561B6 (cs) 1996-11-13
DE3833068C2 (fr) 1992-06-11
GR3007294T3 (fr) 1993-07-30
EP0365068A1 (fr) 1990-04-25
EP0365068B1 (fr) 1992-12-09
PT91831B (pt) 1995-07-18
CZ551789A3 (en) 1996-06-12
WO1990003448A1 (fr) 1990-04-05
DE3833068A1 (de) 1990-04-05
CN1041393A (zh) 1990-04-18
EP0436600B1 (fr) 1993-06-09
PT91831A (pt) 1990-03-30

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