EP0436600B1 - Verfahren und einrichtung zum strecken von leder - Google Patents

Verfahren und einrichtung zum strecken von leder Download PDF

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Publication number
EP0436600B1
EP0436600B1 EP89910848A EP89910848A EP0436600B1 EP 0436600 B1 EP0436600 B1 EP 0436600B1 EP 89910848 A EP89910848 A EP 89910848A EP 89910848 A EP89910848 A EP 89910848A EP 0436600 B1 EP0436600 B1 EP 0436600B1
Authority
EP
European Patent Office
Prior art keywords
leather
fact
stretching
facility according
bearing
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
EP89910848A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0436600A1 (de
Inventor
Jiri 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
DOKOUPIL Jiri
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 DOKOUPIL Jiri filed Critical DOKOUPIL Jiri
Priority to AT89910848T priority Critical patent/ATE90396T1/de
Publication of EP0436600A1 publication Critical patent/EP0436600A1/de
Application granted granted Critical
Publication of EP0436600B1 publication Critical patent/EP0436600B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 film cuts and the like.
  • a device is known as the closest prior art in which the leather pieces are also clamped in a gap between two elastically stretchable membranes and stretched by simultaneous stretching of the two membranes.
  • the membranes are clamped at their edges in rigid, flat frames and are stretched in the central areas by bulging or disengaging with respect to the frame plane.
  • Correspondingly curved pressure elements with a sliding-friendly surface layer are sometimes used for this arching, the latter allowing a relative movement between the membrane and the pressure element.
  • no sliding is provided between the membranes and the leather.
  • the invention is concerned with the realization of further processing functions on the leather in connection with the stretch processing.
  • This includes the combination of the stretching process with heating, which can also be used to improve the stretching results.
  • the invention comprises as a further essential object the combination of the stretching process with drying.
  • this multiple treatment has proven to be fundamentally easy to carry out. In view of the great importance of setting certain moisture levels in the course of leather production and leather processing, this results in an extremely significant progress in rationalization. In practice it has proven to be proven advantageous to apply suction vacuum to the leather on its second surface during the stretching process.
  • Such a stretching device is distinguished from the known by advantageously simplified construction and reduced construction costs as well as increased robustness and operational safety.
  • the slidability of the contact surface is advantageously achieved with the aid 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 materials such as leather and the like.
  • the solution to this problem according to the invention is determined in a stretching device of the aforementioned type in that a heating device which is operatively connected to the leather being processed is provided.
  • a heating device which is operatively connected to the leather being processed is provided.
  • 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 in operative connection with 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.
  • an overall plate-shaped stretching device STV1 arranged along a horizontal plane is mounted on the cantilever arm A of a stationary machine frame G in a vertically adjustable manner.
  • a lifting and lowering device 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 with respect to the leather.
  • the lower working surface AO of a pressure and stretching tool ASW comes into contact with the second (upper) surface L2 of the skin.
  • the latter is firstly applied with uniformly distributed pressure forces Pa acting in the direction against the bearing surface AF and then for stretching the skin under sliding relative to the bearing surface with essentially tangential to the leather surface and on all sides to the edge of the skin directed stretching forces Ps applied.
  • An essential component of the pressure and stretching tool ASW is an elastic stretchable membrane M1 covering the skin, which is maintained by means of a stretching drive device DAV of the pressure forces Pa is extended in the normal direction to their circumferential line and the tangential stretching forces Ps are generated by frictional engagement.
  • 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 attached to the edge of the membrane with rod heads SK.
  • 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 is 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, for example in the indicated form of a hollow plate filled with a circulating heating medium, which has a good heat-conducting connection with the support member TO1.
  • the support element itself is also made of highly heat-conducting material.
  • a convection heating can optionally 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 area of the working surface AO and the membrane and which has a planar network of channel-shaped depressions KV, which is 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 a 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 an essential further development of the invention, according to which the support element TO1 has a base body GKM, to which the surface layer OST is detachably connected. This enables simple wear replacement.
  • a pressure-sensitive adhesive layer is provided for this releasable connection of the surface layer OSM.
  • a permeable membrane M2 with connection to a suction device similar to FIG. 3 is also provided in the embodiment according to FIG.
  • the membrane in the area of its working surface AO, the membrane here 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 detachably 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.
  • FIG. 6 shows a variant of the stretching or stretching / drying machine according to the invention with a carrying device TRV2, which has a band-like carrying element TO2, which is movably mounted with respect to the pressing and stretching tool ASW in the direction parallel to the bearing surface AF and is connected to a feed drive device VA .
  • the carrying device and thus the bearing surface are enlarged here - indicated in the example on one side - beyond the floor plan of the STV stretching device. This allows the application of a skin in a freely accessible area next to the stretching device and while processing another skin, as well as the subsequent, rapid transport of the skin placed on the work area. This means significant progress 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)
EP89910848A 1988-09-29 1989-08-25 Verfahren und einrichtung zum strecken von leder Expired - Lifetime EP0436600B1 (de)

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 EP0436600A1 (de) 1991-07-17
EP0436600B1 true EP0436600B1 (de) 1993-06-09

Family

ID=6363978

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89202523A Expired - Lifetime EP0365068B1 (de) 1988-09-29 1989-08-25 Verfahren und Einrichtung zum Strecken von Leder
EP89910848A Expired - Lifetime EP0436600B1 (de) 1988-09-29 1989-08-25 Verfahren und einrichtung zum strecken von leder

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89202523A Expired - Lifetime EP0365068B1 (de) 1988-09-29 1989-08-25 Verfahren und Einrichtung zum Strecken von Leder

Country Status (12)

Country Link
EP (2) EP0365068B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPH04500979A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
KR (1) KR900702055A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CN (1) CN1020474C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR8907630A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CZ (1) CZ281561B6 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3833068A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES2037402T3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GR (1) GR3007294T3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
PT (1) PT91831B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO (1) WO1990003448A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
YU (1) YU189189A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (12)

* 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
CN114766809B (zh) * 2022-05-10 2024-06-04 湖南奥郎儿童用品有限公司 一种轻便的书包及其制造设备

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

Also Published As

Publication number Publication date
YU189189A (en) 1990-12-31
PT91831A (pt) 1990-03-30
CZ551789A3 (en) 1996-06-12
EP0365068B1 (de) 1992-12-09
PT91831B (pt) 1995-07-18
CN1041393A (zh) 1990-04-18
KR900702055A (ko) 1990-12-05
ES2037402T3 (es) 1993-06-16
EP0365068A1 (de) 1990-04-25
GR3007294T3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-07-30
WO1990003448A1 (de) 1990-04-05
EP0436600A1 (de) 1991-07-17
DE3833068C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-06-11
CN1020474C (zh) 1993-05-05
DE3833068A1 (de) 1990-04-05
BR8907630A (pt) 1991-07-30
JPH04500979A (ja) 1992-02-20
CZ281561B6 (cs) 1996-11-13

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