EP0307679B1 - Web roll support - Google Patents

Web roll support Download PDF

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Publication number
EP0307679B1
EP0307679B1 EP88113865A EP88113865A EP0307679B1 EP 0307679 B1 EP0307679 B1 EP 0307679B1 EP 88113865 A EP88113865 A EP 88113865A EP 88113865 A EP88113865 A EP 88113865A EP 0307679 B1 EP0307679 B1 EP 0307679B1
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EP
European Patent Office
Prior art keywords
web roll
winding
bearing
winding roller
winding roll
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
EP88113865A
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German (de)
French (fr)
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EP0307679A1 (en
Inventor
Ludger Nobbe
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Priority to AT88113865T priority Critical patent/ATE72553T1/en
Publication of EP0307679A1 publication Critical patent/EP0307679A1/en
Application granted granted Critical
Publication of EP0307679B1 publication Critical patent/EP0307679B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle

Definitions

  • the invention relates to a winding roller bearing, consisting of two support arms attached to a machine frame with upwardly open bearing shells, which have bearing surfaces in the form of approximately centrally divided hollow cylinders, with a device that slows down the rolling rotational movement of the winding roller.
  • the braking device consists of a belt attached at one end to the machine frame, which is placed over part of the circumference of the winding roller in such a way that the other end hangs freely over it, with a weight attached to this free end .
  • a more complicated unwinding roller brake is known with a brake band that wraps around the winding reel tele, which is connected instead of a weight with a traction device that tensions the brake band during operation with variable traction.
  • the braking force acting on the winding roll can be set such that it remains essentially constant even when the winding roll diameter decreases.
  • the known winding roller braking devices may work satisfactorily, as long as the winding roller with continuous rotation is handled.
  • a similarly discontinuous mode of operation results if material web lengths are drawn off at intervals from the winding roll to fill up a material web storage device, from which the material web is then removed in time with the processing. If a winding roll accelerated in cycles or in short successive intervals is braked by a brake band acting on its circumference, the outer layers of the winding roll can shift relative to one another, particularly in the case of smooth web material. As a result of this shifting or sliding, especially of layers that have become loose, they can migrate laterally, so that there is an inclined run-in of the web into the machine, which can lead to considerable wrinkling. Often an inclined web can no longer be processed, so that malfunctions can occur.
  • the object of the invention is therefore to provide a winding roller bearing of the type mentioned, which enables simple and quick change of winding rollers and with a simply constructed winding roller brake is provided, which brakes the winding roller shaft with weight-proportional braking force.
  • this object is achieved in a winding roller bearing of the generic type in that the bearing surface consists of a layer of a polyurethane elastomer consisting of a combination of ethylene glycol adipic acid polyester with naphthalene-1,5-diisocyanate.
  • Polyurethane elastomers have good wear properties and high coefficients of friction, which are fundamental for solving the task.
  • a polyurethane elastomer that can be used according to the invention is, for example, the polyurethane elastomer commercially available under the trademark Vulkollan, which has a relatively high coefficient of friction, so that the shaft, which is mounted on a bearing surface made of Vulkollan, is braked.
  • the winding roll mounted in the bearing according to the invention is braked the more the larger its winding diameter. This corresponds to the requirements because a larger braking force must be applied to brake a winding roll with a larger diameter than to brake a winding roll with a smaller diameter.
  • the winding roller bearing according to the invention thus also very simply creates a winding roller brake acting on the winding shaft, the braking force of which is proportional to the roller diameter.
  • a material of high abrasion resistance with a high coefficient of friction is to be used for the bearing surfaces.
  • the machine frame 1 of a machine for producing sacks or bags from tubular film web made of thermoplastic material pulled off a winding roll is provided with two cantilevered arms 2 parallel to one another. These arms 2 have recesses in the region of their ends. In the area of these recesses, bearings 3 are screwed to the arms 2, which are provided with semicircular recesses. These recesses are designed with strips 4 made of Vulkollan, on which the actual winding shaft 5 rests. The winding roller 7 is clamped to the winding shaft 5 via mandrels 6. A web 8 is discontinuously drawn off from this winding roll.
  • the strip 4 forming the bearing surface can also consist of another material, preferably polyurethane, instead of Vulkollan. Any material is suitable as a bearing material that, like Vulkollan, has a high coefficient of friction with high abrasion resistance.

Abstract

The web roll support consists of two supporting arms (2), which are fixed to a machine frame (1) and are provided with open-top bearing shells (3) having bearing faces in the form of hollow cylinders which have been cut approximately down the middle. For the purpose of providing a web roll brake which retards the web roll shaft (5) with weight-proportional braking force, the bearing surfaces consist of a layer of Vulkollan (4) or another material having similarly good wear resistance and similarly high coefficients of friction. <IMAGE>

Description

Die Erfindung betrifft eine Wickelrollenlagerung, bestehend aus zwei an einem Maschinengestell befestigten Tragarmen mit nach oben hin offenen Lagerschalen, die Lagerflächen in Form von etwa mittig geteilten Hohlzylindern aufweisen, mit einer die Abrolldrehbewegung der Wickelrolle abbremsenden Einrichtung. Bei üblichen Wickelrollenlagerungen dieser Art besteht die Bremseinrichtung aus einem mit ihrem einen Ende an dem Maschinengestell befestigten Gurt, der derart über einen Teil des Umfangs der Wickelrolle gelegt ist, daß dessen anderes Ende frei über diese herabhängt, wobei an dieses freie Ende ein Gewicht angehängt ist. Aus der DE-PS 12 52 705 ist eine komplizierter aufgebaute Abwickelrollenbremse mit einem die Wickelrolle telweise umschlingenden Bremsband bekannt, das statt mit einem Gewicht mit einer Zugvorrichtung verbunden ist, die das Bremsband während des Betriebes mit veränderbarer Zugkraft spannt. Durch diese veränderbare Zugkraft kann die auf die Wickelrolle wirkende Bremskraft derart eingestellt werden, daß diese auch bei Abnahme des Wickelrollendurchmessers im wesentlichen konstant bleibt. Die bekannten Wickelrollenbremseinrichtungen mögen zufriedenstellend arbeiten, solange die Wickelrolle mit kontinuierlicher Drehung abgewickelt wird. Es gibt jedoch Anwendungsfälle, in denen die Materialbahn von der Wickelrolle aufgrund einer taktweisen nachfolgenden Verarbeitung intermittierend oder diskontinuierlich abgezogen wird, was bedeutet, daß die Wickelrolle bei jedem Takt beschleunigt und wieder zum Stillstand gebracht werden muß. Eine ähnlich diskontinuierliche Arbeitsweise ergibt sich, wenn in Intervallen von der Wickelrolle Materialbahnlängen zur Auffüllung eines Materialbahnspeichers abgezogen werden, aus dem dann die Materialbahn im Takt der Verarbeitung entnommen wird. Wird eine taktweise oder in kurz aufeinanderfolgenden Intervallen beschleunigte Wickelrolle durch ein auf deren Umfang wirkendes Bremsband abgebremst, so können sich insbesondere bei glattem Bahnmaterial die äußeren Lagen der Wickelrolle gegeneinander verschieben. Durch dieses Verschieben oder Verrutschen insbesondere lose gewordener Lagen können diese seitlich auswandern, so daß sich ein schräger Einlauf der Bahn in die Maschine ergibt, der zu erheblichen Faltenbildungen führen kann. Häufig kann eine schrägeinlaufende Bahn nicht mehr verarbeitet werden, so daß es zu Störungen kommen kann. Um ein Verschieben und Auswandern der äußeren Lagen der Wickelrolle durch deren Abbremsen an deren Umfang zu vermeiden, kann diese über die Wickelrollenwelle abgebremst werden. Bei einer aus der DE-PS 33 35 968 bekannten Wickelrollenbremse dieser Art wirken die Auflagerreaktionen über eine Pendelachse und einen kippbaren Hebel auf eine Bremsscheibe, die über eine mit einem Bremsbelag versehene Gegenscheibe die Wickelrollenwelle mit einer Bremskraft abbremst, die proportional zu dem Gewicht der Wickelrolle ist. Diese bekannte Wickelrollenbremse ist jedoch kompliziert in ihrem Aufbau und ein Wechsel der Wickelrollen erfordert einen erheblichen Aufwand.The invention relates to a winding roller bearing, consisting of two support arms attached to a machine frame with upwardly open bearing shells, which have bearing surfaces in the form of approximately centrally divided hollow cylinders, with a device that slows down the rolling rotational movement of the winding roller. In conventional winding roller bearings of this type, the braking device consists of a belt attached at one end to the machine frame, which is placed over part of the circumference of the winding roller in such a way that the other end hangs freely over it, with a weight attached to this free end . From DE-PS 12 52 705 a more complicated unwinding roller brake is known with a brake band that wraps around the winding reel tele, which is connected instead of a weight with a traction device that tensions the brake band during operation with variable traction. By means of this variable tensile force, the braking force acting on the winding roll can be set such that it remains essentially constant even when the winding roll diameter decreases. The known winding roller braking devices may work satisfactorily, as long as the winding roller with continuous rotation is handled. However, there are applications in which the material web is intermittently or intermittently removed from the winding roll due to a cyclical subsequent processing, which means that the winding roll must be accelerated and brought to a standstill at each cycle. A similarly discontinuous mode of operation results if material web lengths are drawn off at intervals from the winding roll to fill up a material web storage device, from which the material web is then removed in time with the processing. If a winding roll accelerated in cycles or in short successive intervals is braked by a brake band acting on its circumference, the outer layers of the winding roll can shift relative to one another, particularly in the case of smooth web material. As a result of this shifting or sliding, especially of layers that have become loose, they can migrate laterally, so that there is an inclined run-in of the web into the machine, which can lead to considerable wrinkling. Often an inclined web can no longer be processed, so that malfunctions can occur. In order to avoid displacement and migration of the outer layers of the winding roll by braking them on their circumference, it can be braked via the winding roll shaft. In a winding roller brake of this type known from DE-PS 33 35 968, the bearing reactions act via a pendulum axis and a tiltable lever on a brake disc, which brakes the winding roller shaft with a braking force, which is proportional to the weight of the winding roller, via a counter disc provided with a brake pad is. However, this known winding roller brake is complicated in its construction and changing the winding rollers requires considerable effort.

Aufgabe der Erfindung ist es daher, eine Wickelrollenlagerung der eingangs angegebenen Art zu schaffen, die einen einfachen und schnellen Wechsel von Wickelrollen ermöglicht und mit einer einfach aufgebauten Wickelrollenbremse versehen ist, die die Wickelrollenwelle mit gewichtsproportionaler Bremskraft abbremst.The object of the invention is therefore to provide a winding roller bearing of the type mentioned, which enables simple and quick change of winding rollers and with a simply constructed winding roller brake is provided, which brakes the winding roller shaft with weight-proportional braking force.

Erfindungsgemäß wird diese Aufgabe bei einer Wickelrollenlagerung der gattungsgemäßen Art dadurch gelöst, daß die Lagerfläche aus einer Schicht aus einem Polyurethan-Elastomer, bestehend aus einer Kombination von Äthylenglykol-Adipinsäure-Polyester mit Naphthalin-1,5-diisocyanat, besteht. Polyurethan-Elastomere weisen eine gute Verschleißeigenschaft und hohe Reibwerte auf, die für die Lösung der Aufgabe grundlegend sind. Ein erfindungsgemäß einsetzbares Polyurethan-Elastomer ist beispielsweise das unter dem Warenzeichen Vulkollan handelsübliche Polyurethan-Elastomer, das einen verhältnismäßig hohen Reibwert besitzt, so daß die Welle, die auf einer aus Vulkollan bestehenden Lagerfläche gelagert ist, abgebremst wird. Da die Reibkraft gewichtsproportional ist, wird die in dem erfindungsgemäßen Lager gelagerte Wickelrolle desto stärker abgebremst je größer ihr Wickeldurchmesser ist. Dies entspricht den Erfordernissen, weil zum Abbremsen einer Wickelrolle mit größerem Durchmesser eine größere Bremskraft als zum Abbremsen einer Wickelrolle mit kleinerem Durchmesser aufgewendet werden muß. Die erfindungsgemäße Wickelrollenlagerung schafft somit auf einfachste Weise gleichzeitig auch eine auf die Wickelwelle wirkende Wickelrollenbremse, deren Bremskraft proportional zum Rollendurchmesser ist.According to the invention, this object is achieved in a winding roller bearing of the generic type in that the bearing surface consists of a layer of a polyurethane elastomer consisting of a combination of ethylene glycol adipic acid polyester with naphthalene-1,5-diisocyanate. Polyurethane elastomers have good wear properties and high coefficients of friction, which are fundamental for solving the task. A polyurethane elastomer that can be used according to the invention is, for example, the polyurethane elastomer commercially available under the trademark Vulkollan, which has a relatively high coefficient of friction, so that the shaft, which is mounted on a bearing surface made of Vulkollan, is braked. Since the frictional force is proportional to the weight, the winding roll mounted in the bearing according to the invention is braked the more the larger its winding diameter. This corresponds to the requirements because a larger braking force must be applied to brake a winding roll with a larger diameter than to brake a winding roll with a smaller diameter. The winding roller bearing according to the invention thus also very simply creates a winding roller brake acting on the winding shaft, the braking force of which is proportional to the roller diameter.

Das Warenzeichen Vulkollan ist die Sammelbezeichnung für eine hochwertige Gruppe von kautschukelastischen Kunststoffen aus Desmophen 2000 (Äthylenglykol-Adipinsäure-Polyester, [HO(CH2).0.0C(CH2)4C0].[0.(CH2)2.0.0C(CH2)4C0]n0.(CH2)20H in Kombination mit Desmodur 15 = Naphthalin-1,5-diisocyanat). Statt Vulkollan kann auch ein anderes Material mit ähnlich guten Verschleißeigenschaften und ähnlich hohen Reibwerten verwendet werden. Erfindungsgemäß ist für die Lagerflächen ein Material von hoher Abriebfestigkeit bei hohem Reibwert zu verwenden.The Vulkollan trademark is the collective name for a high-quality group of rubber-elastic plastics made from Desmophen 2000 (ethylene glycol adipic acid polyester, [HO (CH2) .0.0C (CH2) 4C0]. [0. (CH2) 2.0.0C (CH2) 4C0 ] n0. (CH2) 20H in combination with Desmodur 15 = naphthalene-1,5-diisocyanate). Instead of Vulkollan, another material with similarly good wear properties and similarly high coefficients of friction can be used. According to the invention, a material of high abrasion resistance with a high coefficient of friction is to be used for the bearing surfaces.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

Fig. 1
eine perspektivische Ansicht der in Tragarmein eines Maschinengestells gelagerten Wickelrollenwelle mit auf dieser gehalterten Wickelrolle,
Fig. 2
eine Seitenansicht einer Wickelrollewellenlagerung und
Fig. 3
eine Draufsicht auf die Wickelrollenwellenlagerung nach Fig. 2.
An embodiment of the invention is described below the drawing explained in more detail. In this shows
Fig. 1
2 shows a perspective view of the winding roller shaft mounted in the support arm of a machine frame with the winding roller held thereon,
Fig. 2
a side view of a winding roller shaft bearing and
Fig. 3
3 shows a plan view of the winding roller shaft bearing according to FIG. 2.

Das Maschinengestell 1 einer Maschine zur Herstellung von Säcken oder Beuteln aus von einer Wickelrolle abgezogenen Schlauchfolienbahn aus thermoplastischem Kunststoffmaterial ist mit zwei zueinander parallelen auskragenden Armen 2 versehen. Diese Arme 2 weisen im Bereich ihrer Enden Ausnehmungen auf. Im Bereich dieser Ausnehmungen sind Lager 3 mit den Armen 2 verschraubt, welche mit halbkreisförmigen Ausnehmungen versehen sind. Diese Ausnehmungen sind mit Streifen 4 aus Vulkollan ausgelegt, auf denen die eigentliche Wickelwelle 5 aufruht. Über Spanndorne 6 ist die Wickelrolle 7 mit der Wickelwelle 5 verspannt. Von dieser Wickelrolle wird eine Bahn 8 diskontinuierlich abgezogen.The machine frame 1 of a machine for producing sacks or bags from tubular film web made of thermoplastic material pulled off a winding roll is provided with two cantilevered arms 2 parallel to one another. These arms 2 have recesses in the region of their ends. In the area of these recesses, bearings 3 are screwed to the arms 2, which are provided with semicircular recesses. These recesses are designed with strips 4 made of Vulkollan, on which the actual winding shaft 5 rests. The winding roller 7 is clamped to the winding shaft 5 via mandrels 6. A web 8 is discontinuously drawn off from this winding roll.

Der die Lagerfläche bildende Streifen 4 kann statt aus Vulkollan auch aus einem anderen Material, vorzugsweise Polyurethan bestehen. Als Lagermaterial ist jedes Material geeignet, das ähnlich wie Vulkollan bei hoher Abriebfestigkeit einen hohen Reibwert aufweist.The strip 4 forming the bearing surface can also consist of another material, preferably polyurethane, instead of Vulkollan. Any material is suitable as a bearing material that, like Vulkollan, has a high coefficient of friction with high abrasion resistance.

Claims (1)

  1. Winding roll mounting, comprising two supporting arms (2) fastened to a machine stand (1), with upwardly open bearing shells (3), which have bearing surfaces in the form of approximately centrally split hollow cylinders, a device retarding the unrolling rotational movement of the winding roll (7), characterised in that the bearing surfaces are composed of a layer (4) of a polyurethane elastomer, comprising a combination of poly (ethylene glycol) adipate with naphthalene 1,5 diisocyanate.
EP88113865A 1987-09-14 1988-08-25 Web roll support Expired - Lifetime EP0307679B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88113865T ATE72553T1 (en) 1987-09-14 1988-08-25 WINDING ROLL STORAGE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8712432U 1987-09-14
DE8712432U DE8712432U1 (en) 1987-09-14 1987-09-14

Publications (2)

Publication Number Publication Date
EP0307679A1 EP0307679A1 (en) 1989-03-22
EP0307679B1 true EP0307679B1 (en) 1992-02-12

Family

ID=6812070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88113865A Expired - Lifetime EP0307679B1 (en) 1987-09-14 1988-08-25 Web roll support

Country Status (3)

Country Link
EP (1) EP0307679B1 (en)
AT (1) ATE72553T1 (en)
DE (2) DE8712432U1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103979331A (en) * 2014-05-29 2014-08-13 昆山宝锦激光拼焊有限公司 Rust prevention paper spreading frame
CN109928243B (en) * 2019-04-24 2023-12-08 浙江精力玛智能机械有限公司 Cloth feeding structure of cloth spreading machine
CN111807121A (en) * 2020-07-31 2020-10-23 杭州丙甲科技有限公司 Device for spreading a packaging sheet into a three-dimensional packaging material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335968C1 (en) * 1983-10-04 1985-06-05 Kunz Maschinen- und Apparatebau GmbH, 7850 Lörrach Storage device for an up and down winding

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU541626B2 (en) * 1980-08-15 1985-01-17 David & Sue Baker Pty. Ltd. Unwinding fencing material
DE8509152U1 (en) * 1985-03-27 1985-07-18 Vereinigte Aluminium-Werke AG, 1000 Berlin und 5300 Bonn Support element for hanging up film rolls

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335968C1 (en) * 1983-10-04 1985-06-05 Kunz Maschinen- und Apparatebau GmbH, 7850 Lörrach Storage device for an up and down winding

Also Published As

Publication number Publication date
ATE72553T1 (en) 1992-02-15
DE3868372D1 (en) 1992-03-26
EP0307679A1 (en) 1989-03-22
DE8712432U1 (en) 1987-11-12

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