EP0559166B1 - Maschine zum Strecken von Häuten - Google Patents

Maschine zum Strecken von Häuten Download PDF

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Publication number
EP0559166B1
EP0559166B1 EP93103361A EP93103361A EP0559166B1 EP 0559166 B1 EP0559166 B1 EP 0559166B1 EP 93103361 A EP93103361 A EP 93103361A EP 93103361 A EP93103361 A EP 93103361A EP 0559166 B1 EP0559166 B1 EP 0559166B1
Authority
EP
European Patent Office
Prior art keywords
stretching
roller
unit
hide
frame
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
EP93103361A
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English (en)
French (fr)
Other versions
EP0559166A1 (de
Inventor
Giocondo Baggio
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.)
Baggio Tecnologie Srl
Original Assignee
Baggio Tecnologie Srl
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 Baggio Tecnologie Srl filed Critical Baggio Tecnologie Srl
Publication of EP0559166A1 publication Critical patent/EP0559166A1/de
Application granted granted Critical
Publication of EP0559166B1 publication Critical patent/EP0559166B1/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

Definitions

  • the invention concerns a machine for the stretching hides.
  • stretching machines which consist of at least a pair of rollers for the feed of the hide to be stretched, and of a stretching roller which is positioned in contact with the surface of the hide.
  • the stretching roller presents on its external surface, a plurality of helicoidal blades which, beginning from the center of the roller, are wound following directions opposite to one another, therefore, when the stretching roller is made to rotate, its helicoidal blades cause a stretching following the orthogonal direction in relation to the feed direction itself, because of the contact of the helicoidal blades against the hide which is conveyed forward by the feeding rolls.
  • the US-A-1 715 582 discloses a leather working machine for stretching leather fixed in a working table with hide clamping means and a carriage mounted above the table supporting a pressing and stretching roller which operates an half hide each operation.
  • the FR-A-2 506 701 discloses a method for stretching and smooting hides realized by machine with more than one carriages presenting each one two stretching roller and one smooting roller. The rollers move from a starting point on the hide to one end of the hide, from this end of the hide to the opposite end of the hide, from the second end of the hide back to the starting point.
  • Another inconvenience is that, if an optimum stretching cannot be guaranteed, a sometimes considerable percentage of the surface of the hide is wasted after the drying operation.
  • the present invention is disclosed. Its main purpose is that of obtaining a stretching machine to perform a method for stretching the hides, through which, in relation to methods and machines belonging to the known technique, it is possible to obtain an improved stretching of the hide and, as a consequence an improved quality of the same after the drying process. Another purpose is to obtain a better use of the total surface of the hide.
  • the mentioned purposes are reached by the stretching machine of the invention, the main features of which are in accordance with claim 1.
  • the machine according to the invention allows an improvement of the stretching process and, as a consequence an overall improvement of the hide quality after the same has been dried.
  • the stretching machine accorto the invention As can be observed in Fig. 1, the stretching machine accorto the invention, indicated as whole with 1, consists of a conveyor belt 2 on which the hide 14 to be stretched is laid flat and which, through the advancing of the conveyor belt 2 following direction 4, is brought into the position where it will be stretched over a working bench 5 which is attached to the support base 6 of the stretching machine.
  • a frame 13 is attached to the support 6 of the machine by means of uprights 7, said frame overhanging the working bench 5 and supporting a pressing unit, indicated as a whole with 10, which is arranged at an essentially central position in relation to the working bench 5.
  • Said frame also supports a pair of stretching rollers, 8 and 9 respectively, which are parallel to the working bench 5 and arranged at opposite positions in relation to the pressing unit 10.
  • the pressing unit indicated as whole with 10 consists in turn, of a pressure roller 11 which can be displaced vertically in relation to the working bench 5 through a pair of pneumatic cylinders 12 arranged at the ends of said roller and attached to frame 13, through which, the pressing roller 11 blocks the hide 14 ready to be processed, against the surface of the working bench 5.
  • the stretching roller 8 is supported at each of its ends , by a training plate 16 fulcred through a pivot 18 on a support plate 20 which assures on frame 13 through a gear wheel 22, visible in Fig. 1, which in turn engages a rack (not visible in Fig. 1) applied on frame 13.
  • the stretching roller 9 is supported at each of its ends by a training plate 17 fulcred through a pivot 19 on a support plate 21 which assures on the same frame 13 through another gear wheel 23 engaging the same rack which is engaged by the previously mentioned gear wheel 22.
  • each stretching roller is in turn each in contact at one point, 44 and 45 respectively, with the ends 42 and 43 respectively of the stem of a pneumatic cylinders connected with the corresponding support plate 20 and 21, so that, when said cylinders are made to function by means of compressed air, each stretching roller can be displaced vertically in relation to the working bench 5, according to one of the two directions of arrows 40 and 41.
  • the support plates 20 and 21 of the stretching roller 8 and of the stretching roller 9 respectively, are joined together in correspondence with both ends of the rollers through a connecting rod 24, so that as a result, the rollers 8 and 9 are firmly connected with each other.
  • one of the support plates 20, is connected through a bracket 3, to the end of stem 26 of a pneumatic cylinder 25 attached to the frame 13 which, whenever it is supplied with compressed air, moves both the support plates 20 and 21 which are joined together, and, as a consequence, it also causes the rollers 8 and 9, which are supported by said plates, to move following the directions indicated by the arrows 27 or 28, along frame 13, subject to the movement of stem 26.
  • both stretching rollers 8 and 9 are bound to frame 13 by means of a translation kinematic unit, indicated as a whole with 70, along frame 13 itself, and comprising a pneumatic cylinder 25, whose stem 26 is mechanically connected to the support plates 20 and 21, each of them being equipped with a gear wheel, 22 and 23 respectively, engaging the rack attached to the frame 13.
  • a translation kinematic unit indicated as a whole with 70, along frame 13 itself, and comprising a pneumatic cylinder 25, whose stem 26 is mechanically connected to the support plates 20 and 21, each of them being equipped with a gear wheel, 22 and 23 respectively, engaging the rack attached to the frame 13.
  • the stretching roller 8 is connected with the support plate 20 through a vertical displacement unit, indicated as a whole with 72, and comprising a pneumatic cylinder 42 attached to the support plate 20 and whose stem is in contact with the training plate 16 at its point 44.
  • the stretching roller 9 is connected with the support plate 21 through another vertical displacement unit, indicated as a whole with 71, and comprising a pneumatic cylinder 43 attached to the support plate 21 and whose stem is in contact with the training plate 17 at its point 45.
  • Each stretching roller 8 and 9 is also equipped with a kinematic rotation unit operated by an electric motor (not represented in the Fig.) which causes each roller to rotate around its horizontal axis, 46 and 47 respectively.
  • an electric motor not represented in the Fig.
  • the stretching roller 8 is made to rotate around its axis 46 by a kinematic unit, indicated as a whole with 30, which consists of a pulley 32 keyed to the axis 46 of the roller itself, said pulley receiving through a driving belt 34, the motion of a driving pulley 36 keyed on the shaft of the driving motor.
  • the stretching roller 9 (not visible in Fig.
  • the kinematic unit 31 which comprises a pulley 33 keyed to the axis 47 of the roller itself, said pulley being made to rotate by a driving pulley 37 keyed on the axis of the driving motor through the action of a belt 35.
  • each stretching roller 8 and 9 can be displaced vertically so as to approach or move away from the working bench 5, and it can also rotate around its axis and simultaneously it can be translated along frame 13.
  • a removal unit for the hide indicated as a whole with 50, which consists of a top motor-driven conveyor belt 51 adhering to a bottom motor-driven conveyor belt 52, both belts being made to move following respectively directions 55 and 56, and allowing the removal of the hide 14 from the machine after the stretching process has been completed.
  • the working process starts when both the pressing roller 11 and the stretching rollers 8 and 9 are in the position represented in Fig. 5, that is to say, lifted away from the hide 14 so that, by operating the pneumatic cylinder 12, belonging to the pressing unit 10, the pressing roller 11 is forced against the hide 14, thus blocking the latter on the working bench 5, as can be observed in Fig. 6. Simultaneously, the stretching roller 9 is lowered too, by operating the pneumatic cylinder 43 belonging to the vertical displacement unit 71, while the stretching roller 8 remains in the lifted position.
  • portion 60 of the hide 14 begins the stretching process of portion 60 of the hide 14, such stretching occurring because of the action of the protruding helicoidal blades 41 applied on each stretching roller and visible in Fig. 3.
  • the stretching of the hide occurs only in the opposite directions of winding of the stretching rollers.
  • the stretching roller 9 As will be observed in Fig. 7, has reached its end stroke toward direction 28, and, therefore, it has completed the stretching of area 60 of the hide 14 being processed, the stretching roller 9 is lifted up by means of a pneumatic piston 43, as will be observed in Fig. 8, while the stretching roller 8 is simultaneously lowered and is in turn made to rotate around its axis through the kinematic unit 30 and simultaneously it is also displaced following the direction of arrow 27 by the action of the kinematic translation unit 70. The roller 8 therefore, starts moving following direction 27, thus causing the stretching of the part 61 of the hide 14, visible in the schematic representation of Fig. 9.
  • the stretching operation is completed when the stretching roller 8 reaches the end of its stroke and, in such a position, it is lifted up again through the action of the pneumatic cylinder 42. Simultaneously the pressing roller 11 is lifted up, too, thus achieving the configuration represented in Fig. 10, wherein the hide 14, which has been stretched, can be removed from the stretching machine.
  • the conveyor belt 2 is made to roll again in direction 4, as can be observed in Fig. 3, so that the belts 51 and 52 of the removal unit 50 catch the hide 14 which will then be removed from the machine.
  • helicoidal blades 41 wound on the surface of each roller and, beginning from the center, following opposed axial directions, they can be replaced with variously shaped rough-surfaced ribs, applied on the surface of the roller or with elements having different shape and dimensions however arranged with opposed and essentially helicoidal directions along the axial direction of the roller.
  • Said surfaces or contact elements can be arranged according to one or more principles and they may acquire any configuration and any shape.
  • the driving means of both the pressing roller 11 and the stretching rollers 8 and 9 can be of any type, such as electrical, pneumatic, hydraulic, mechanical or others.
  • stretching rollers these can be modified, too.
  • a different embodiment could foresee a single stretching roller placed at one side only in relation to the pressing unit, wherein said stretching roller always moves in the same direction in relation to the pressing unit, while the hide to be processed is placed on a rotating working bench.
  • the stretching roller performs the stretching of the hide with a back and forth movement following the same direction, wherein in the first movement it stretches half of the hide, while the other half, after the hide has been rotated by 180 degrees, is stretched during the backward movement.
  • Another different embodiment can foresee the two stretching rollers to be independent of each other, each of them possibly performing the translation movement simultaneously with the other, each being driven by its own driving means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Claims (9)

  1. Erweiterungsmaschine (1), die einen über der Werkbank (5) angeordneten Rahmen (3) einschliesst und folgende Bestandteile trägt:
    - ein Drückaggregat (10), das in einer im wesentlichen mittigen Lage im Verhältnis zur Werkbank (5) angeordnet ist und mit mindestens einem Drückelement (11) zum Festhalten des Fells (14) an der Werkbank (5) ausgerüstet ist;
    - Erweiterungswalzen, die mit Erweiterungselementen ausgerüstet und mit einem ersten kinematischen Aggregat (30, 31) mechanisch verbunden sind, das sie um ihre eigene Achse zum Drehen treibt, und mit einem zweiten kinematischen Aggregat (70) zur Versetzung entlang des Rahmens (13) ausgerüstet sind, dadurch gekennzeichnet, daß die Erweiterungswirkung von einem Paar Erweiterungswalzen (8, 9) ausgeübt wird, die parallel zur Werkbank und an gegenüberliegenden Stellungen in Verhältnis zum Drückaggregat (10) angeornet sind, wobei jede Walze (8, 9) mit einem Aggregat (72, 71) zur eigenen senkrechten Verstellung im Verhältnis zur Werkbank (5) ausgerüstet ist, indem das genannte Aggregat (72, 71) die Walze (8, 9) von dem Fell (14) entfernt hält, als die andere Walze (9, 8) am Fell haftet, um ihre eigene Achse dreht und, gleichzeitig, sich entlang des Rahmens (13) der genannten Maschine versetzt.
  2. Erweiterungsmaschine nach Anspruch 1., dadurch gekennzeichnet, daß die Werkbank (5) ein Zufuhr-Förderband (2) einschliesst, worauf das zu erweiternde Fell (14) aufgelegt wird, und das auf der Oberfläche der Werkbank (5) gleitet, wobei das Ende des genannten Förderbands (2) ein Ablade-Aggregat (50) zum Abladen der erweiteten Felle speist.
  3. Erweiterungsmaschine nach Anspruch 1., dadurch gekennzeichnet, daß das kinematische Aggregat (70) zur Versetzung der Erweiterungswalzen (8, 9) entlang des Rahmens (13), einen pneumatischen Zylinder (25) einschliesst, der am Rahmen (13) befestigt ist und dessen Schaft (26) an mindestens einer Stützplatte (20, 21) befestigt ist, wobei die genannten Stützplatten fest miteinander verbunden sind, und jede Stützplatte ein Ende jeder der genannten Erweiterungswalzen stützt, wobei jede der genannten Stützplatten mit einem Zahnrad (22, 23) versehen ist, das daran leer gekeilt ist und einer am Rahmen (13) befestigten Zahnstange angepasst ist.
  4. Erweiterungsmaschine nach Anspruch 3., dadurch gekennzeichnet, daß das Aggregat (72, 71) zur senkrechten Versetzung jeder Walze (8, 9) eine Zugplatte (16,17) einschliesst, die die Stützwalze an ihrem Ende stützt und an ihrer entsprechenden Stützplatte (20, 21), die zum Verstellungsaggregat (70) gehört, mittels eines Zapfens (18, 19) leer gekeilt ist, worum sie leerlaufen kann, als die Wirkung eines an der entsprechenden Stützplatte (20, 21) befestigten pneumatischen Zylinders (42, 43), dessen Kolbstange an einer Stelle (44, 45) mit seiner entsprechenden Zugplatte (16, 17) in Berührung ist, sie zum Drehen treibt.
  5. Erweiterungsmaschine nach Anspruch 1., dadurch gekennzeichnet, daß das kinematische Aggregat (30, 31) zur Umdrehung jeder Erweiterungswalze (8, 9) eine Keilriemenscheibe (32, 33) aufweist, die an der Achse (46, 47) der Walze gekeilt ist, die durch einen Keilriemen (34, 35) die Bewegung aus einer an einem Antriebsmotor gekeilten Keilriemenscheibe (36, 37) nimmt.
  6. Erweiterungsmaschine nach Anspruch 1., dadurch gekennzeichnet, daß das Druckelement des Drücksaggregats (10) eine Drückwalze ist (11), die sich im Verhältnis zur Werkbank (5) durch mindestens einen am Rahmen (13) befestigten pneumatischen Antriebszylinder (12) senkrecht bewegt.
  7. Erweiterungsmaschine nach Anspruch 1., dadurch gekennzeichnet, daß die Erweiterungselemente jeder Erweiterungswalze (8, 9) eine Mehrzahl von schraubenförmigen Messern (41) sind, die um ihre äussere Oberfläche in gegenüberliegenden Richtungen - von der Mitte (43) jeder Walze anfangend - angeordnet sind.
  8. Erweiterungsmaschine nach Anspruch 2., dadurch gekennzeichnet, daß das Aggregat (50) zum Abladen des Fells (14), nachdem das Erweiterungsverfahren ausgeführt worden ist, ein Paar von motorangetriebener Förderbänder (55, 56) aufweist, die aneinander anhaften und mit dem Zufuhr-Förderband (2) gefluchtet sind, da wo dieses die Stellung erreicht, wo das Fell abgeladen wird, nachdem das Erweiterungsverfahren ausgeführt worden ist.
  9. Erweiterungsmaschine nach Anspruch 3., dadurch gekennzeichnet, daß die Stützplatten (20, 21), die einzeln das Ende einer Erweiterungswalze stützen und an der gleichen Seite angeordnet sind, fest mit einander durch einen Verbindungsstab (24) verbunden sind.
EP93103361A 1992-03-05 1993-03-03 Maschine zum Strecken von Häuten Expired - Lifetime EP0559166B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI920031A IT1258110B (it) 1992-03-05 1992-03-05 Metodo per l'allargatura delle pelli e macchina allargatrice atta a realizzare tale metodo
ITVI920031 1992-03-05

Publications (2)

Publication Number Publication Date
EP0559166A1 EP0559166A1 (de) 1993-09-08
EP0559166B1 true EP0559166B1 (de) 1997-07-30

Family

ID=11424845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103361A Expired - Lifetime EP0559166B1 (de) 1992-03-05 1993-03-03 Maschine zum Strecken von Häuten

Country Status (4)

Country Link
EP (1) EP0559166B1 (de)
DE (1) DE69312529T2 (de)
ES (1) ES2107567T3 (de)
IT (1) IT1258110B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1393001B1 (it) * 2009-02-19 2012-04-02 Bauce Tri Ma S R L Metodo per l'allargatura di pelli e macchina allargatrice atta a realizzare tale metodo
IT1404081B1 (it) * 2011-01-13 2013-11-08 Dal Lago S R L Installazione di pressatura per l'asciugatura di pelli animali.
ITVE20110018A1 (it) * 2011-03-28 2012-09-29 Dal Lago S R L Macchina stenditrice di pelli animali
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE242875C (de) *
US1715582A (en) * 1927-05-14 1929-06-04 Machinery Dev Company Leather-working machine
FR2506781A1 (fr) * 1981-05-26 1982-12-03 Cabrol Pierre Procede et machine pour le travail des cuirs et peaux, utilisant des cylindres rotatifs d'etirage et de lissage

Also Published As

Publication number Publication date
ITVI920031A1 (it) 1993-09-05
EP0559166A1 (de) 1993-09-08
ES2107567T3 (es) 1997-12-01
DE69312529T2 (de) 1998-03-05
ITVI920031A0 (it) 1992-03-05
IT1258110B (it) 1996-02-20
DE69312529D1 (de) 1997-09-04

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