EP1982938B1 - Method for storing flat, sheet-like semi-finished products - Google Patents

Method for storing flat, sheet-like semi-finished products Download PDF

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Publication number
EP1982938B1
EP1982938B1 EP08033515A EP08033515A EP1982938B1 EP 1982938 B1 EP1982938 B1 EP 1982938B1 EP 08033515 A EP08033515 A EP 08033515A EP 08033515 A EP08033515 A EP 08033515A EP 1982938 B1 EP1982938 B1 EP 1982938B1
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EP
European Patent Office
Prior art keywords
semi
winding core
axis
larger
finished product
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Not-in-force
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EP08033515A
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German (de)
French (fr)
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EP1982938A1 (en
Inventor
Oliver Dr. Türk
Stefan Jakobs
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POLYNT GmbH
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POLYNT GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/10—Mechanisms in which power is applied to web-roll spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/04—Kinds or types
    • B65H75/08—Kinds or types of circular or polygonal cross-section
    • B65H75/14—Kinds or types of circular or polygonal cross-section with two end flanges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/18—Form of handled article or web
    • B65H2701/184—Wound packages
    • B65H2701/1844—Parts concerned
    • B65H2701/18442—Core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/18—Form of handled article or web
    • B65H2701/184—Wound packages
    • B65H2701/1848—Dimensional aspect
    • B65H2701/18486—Non-cylindrical form, e.g. flat bobbin

Definitions

  • the invention relates to a method for stocking flat, sheet-like semi-finished products, in particular of fiber-matrix semi-finished products with thermoset or thermoplastic matrix.
  • the invention is further directed to a supply reel for flat, sheet-shaped semifinished product, in particular for fiber-matrix semifinished product with duroplastic or thermoplastic matrix, which is suitable for carrying out the method according to the invention.
  • Sheet-like fiber-matrix semi-finished products are semi-finished products which consist of reinforcing fibers, mainly glass fibers or carbon fibers, which are impregnated with a plastic matrix.
  • the matrix may be a thermoset or thermoplastic.
  • Thermoplastic matrix semi-finished fiber matrix materials are often referred to as SMC (Sheet Molding Compound).
  • Fiber-matrix semi-finished products with a thermoplastic matrix are available in particular as LFT (long-fiber reinforced thermoplastics) and as GMT (glass mat reinforced thermoplastics).
  • LFT long-fiber reinforced thermoplastics
  • GMT glass mat reinforced thermoplastics
  • thermoplastic matrix semi-finished products for door panels or luggage compartment covers for motor vehicles or the like
  • SMC is used for the production of automotive exterior parts such as, for example, trim parts of truck tractors.
  • the flat semi-finished products in which the reinforcing fibers are usually present as cut fibers, but can also occur in mat or in fabric form, can be cut and further processed by means of extrusion to finished components. This makes it particularly economical body parts for cars, sports equipment and components for the air and Aerospace industry are produced, and it is also possible to insert additional fasteners in the mold during pressing and to connect firmly in the manufacture of the component with the fiber composite material.
  • the flat material produced in long webs is usually arranged on a carrier film of polyamide or polyethylene and then either folded into cartons or wound onto a reel.
  • these have a winding core with a diameter of usually 250 mm, on which then a web length is wound with a total weight of about 350 kg.
  • each 300 to 350 kg of semi-finished supporting supply reels are supplied to the material processing producers, usually in a supply and transport shelf, which can accommodate four such roles, where then the semi-finished from the supply reel and the carrier film is withdrawn before a Section of the required length of the semifinished product in a press or the like. transformed into the finished product and cured.
  • the supply reels must be changed by the producer and processor of the material, which forces an interruption of the production. Assuming, for example, that for each component to be produced from the semifinished product an amount of 20 kg is processed and the cycle time for each component is four minutes, this requires a change of the approximately 300 kg of wound supply reels after only one hour.
  • EP 1 038 814 A2 is a winding system for sheets of thermoset compound compounds known to be used in the transport rollers for fiber-matrix semi-finished products, which have a width of 1.50 m and a diameter of the winding core of 400 to 600 mm. Due to the larger hub can be wound on such transport rollers also more web-shaped fiber-matrix semifinished than in the hitherto still mostly used 350 kg rollers.
  • the mass and size ratios in such large rolls are the same as in the standard rolls, ie, the amount of wound onto the winding core larger diameter web material is directly proportional to the volume of the winding core.
  • the object of the invention is to provide a method and a particularly suitable for carrying out supply reel, whereby a larger amount of sheet-like semifinished than in the hitherto mainly used standard containers can be stored without this undermines the basis weight constancy of wound on the reel material.
  • the supply reel according to the invention is characterized in that the winding core of the reel has a non-circular, symmetrical to two mutually perpendicular half-axes of different sizes cross-section.
  • the winding core may, for example, have a substantially elliptical or oval cross-section.
  • the size ratio of the larger half-axis to the smaller half-axis is preferably in the range of 1.25 to 3, in particular in the range between 1.35 and 2.75. It is for example possible that the larger half-axis has a length between 225 and 325 mm and the smaller half-axis has a length between 125 and 220 mm.
  • the winding core may also have an approximately diamond-shaped, rounded in the corners and / or flattened cross-section, wherein the cross section of the winding core in the apex areas of the larger half-axes preferably rounded approximately circular segment and extending in the apex areas of the smaller half-axes advantageously with approximately parallel to the larger half-axes Flattening is provided, which merge with the formation of radii or circular arcs in the adjacent sides of the diamond-shaped basic shape.
  • Such a design can be easily produced, for example, from welded steel segments.
  • Such a winding core is for example from the GB 2 296 229 A known.
  • a supply reel according to the invention can be arranged with the wound on the winding core semi-finished in a storage and / or transport rack and fixed therein against rotation.
  • a larger proportion of the weight of the wound web is removed directly into the winding core, whereby the absorbed by the material itself tensile forces are reduced and the pressure loads that the material has less than a supply reel with a cylindrical winding core on which the same amount of semifinished product is wound up.
  • the winding speed is not constant at a constant rotational speed of the reel.
  • it has been shown that such a procedure is not required in most cases, because the winding and unwinding of the material takes place even with constant drive speed for the reel with great reliability and quality.
  • 10 designates a supply reel for winding and storing a flat, sheet-like semifinished product 11, namely a thermosetting matrix fiber matrix strip arranged on a carrier film (not illustrated), as it is also known under the name "SMC” (Sheet Molding Compound ) is known.
  • SMC Sheet Molding Compound
  • the supply reel consists essentially of a central winding core 12, which is provided at its two front ends with thrust washers 13, which prevent damage to the edges of the wound on the winding core semifinished product.
  • the thrust washers are provided on the outside with hexagonal end plates, which allow not only in a particularly simple manner a correct Oriendtechnik the hub relative to the horizontal, for example, during transport and storage of the reel, but also a space-saving stacking.
  • the winding core has a non-circular cross-section, wherein it is symmetrical to two mutually perpendicular half-axes 14, 15 of different sizes.
  • the winding core 12 has an elliptical cross-section, wherein the size ratio of the larger half-axis 14 to the smaller half-axis 15 is about 1.4.
  • the length L of the larger half-axis 14 is about 275 mm in both illustrated embodiments, the length l of the smaller half-axis 15 is about 200 mm.
  • the cross-sectional shape of the winding core 12 is derived from a rhombus, the illustration in Fig.
  • the winding core is rounded in its major semiaxial 14 intersecting corner regions 17 with a comparatively large radius and in which the small half-axes 15 intersecting vertex areas 18 with parallel to the larger half-axis 14 extending flats 19, the formation of Radii 20 in the adjacent sides 21 of the diamond-shaped basic shape 16 pass.
  • the material unwound from the oval / elliptical core reel according to the present invention in an amount of almost 1,900 kg was checked for warping or deformation while being wound on the small rolls. No distortions or deformations could be detected.
  • the quality of the material was comparable to that regularly achieved by standard rolls of about 350 kg net weight.
  • the basis weight of the material unwound from the supply reel according to the invention was likewise determined at different positions of the winding core. For this purpose, each 100 cm 2 large specimens were detached from the unwound semifinished product web.
  • the basis weights determined therefrom and their deviation relative to the original weight per unit area of the material before being wound up on the supply reel according to the invention and storage over a period of five days are reproduced in Table 1. It can be seen that the deviations from the original weight, which are in the range of ⁇ 50 g per m 2 , represent an excellent value, especially considering that nearly 1,900 kg were on the supply reel according to the invention.
  • Comparable values were also obtained when the material was stored on the supply reel according to the invention over a comparatively long period of two weeks. Even in such a case, no warping and deformation of the material stored for more than two weeks when wrapping on other (standard) rolls could be detected.
  • the deviations of basis weight from baseline were between -2.2 and + 3.5%, the deviations being essentially independent of the relative position of the tested material to the spool core, and given a wound amount of 1700 kg and the comparatively long storage period as must be considered surprisingly low.
  • the invention is not limited to the illustrated and described embodiments.
  • other cross-sectional shapes of the winding core are conceivable, for example, an oval cross section, in particular those cross sections in which the ratio of the lengths of the larger half axis to the smaller half axis is still significantly greater than in the illustrated and described Examples.

Landscapes

  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Replacement Of Web Rolls (AREA)

Abstract

The method involves coiling a flat, sheet-like semi-finished product around a take-off reel (10) with roll cores (12) symmetric to semi-major axes of different dimension, where the axes are perpendicular to each other and are non-circular in cross-section. The reel is aligned after the coiling of the semi-finished product on the cores and before winding up of the product, where larger of the major axes run parallel to horizontals. The reel is arranged with the product in a bearing and/or transport cradle.

Description

Die Erfindung betrifft ein Verfahren zum Bevorraten von flächigen, bahnförmigen Halbzeugen, insbesondere von Faser-Matrix-Halbzeugen mit duroplastischer oder thermoplastischer Matrix. Die Erfindung ist ferner auf eine Vorratshaspel für flächiges, bahnförmiges Halbzeug, insbesondere für Faser-Matrix-Halbzeug mit duroplastischer oder thermoplastischer Matrix gerichtet, die für die Durchführung des erfindungsgemäßen Verfahrens geeignet ist.The invention relates to a method for stocking flat, sheet-like semi-finished products, in particular of fiber-matrix semi-finished products with thermoset or thermoplastic matrix. The invention is further directed to a supply reel for flat, sheet-shaped semifinished product, in particular for fiber-matrix semifinished product with duroplastic or thermoplastic matrix, which is suitable for carrying out the method according to the invention.

Flächige Faser-Matrix-Halbzeuge sind Halbzeuge, die aus Verstärkungsfasern, hauptsächlich Glasfasern oder Kohlestoffasern, bestehen, die mit einer Kunststoffmatrix getränkt sind. Bei der Matrix kann es sich um einen duroplastischen oder thermoplastischen Kunststoff handeln. Faser-Matrix-Halbzeuge mit duroplastischer Matrix werden oft auch als SMC (Sheet Molding Compound) bezeichnet. Faser-Matrix-Halbzeuge mit thermoplastischer Matrix gibt es insbesondere als LFT (Langfaserverstärkte Thermoplaste) und als GMT (Glasmattenverstärkte Thermoplaste) Die Faser-Matrix-Halbzeuge werden meist in automatisierten Herstellverfahren zur Herstellung von Faser-Kunststoff-Verbundbauteilen eingesetzt. So verwendet man beispielsweise Halbzeuge mit thermoplastischer Matrix für Türverkleidungen oder Gepäckraumabdeckungen für Kraftfahrzeuge od.dgl., während SMC für die Herstellung von KFZ-Außenteilen wie z.B. Verkleidungsteilen von LKW-Zugmaschinen zum Einsatz kommt. Die flächigen Halbzeuge, bei denen die Verstärkungsfasern meist als Schnittfasern vorliegen, aber auch in Matten- oder in Gewebeform vorkommen können, lassen sich zuschneiden und mittels Fließpressen zu fertigen Bauteilen weiterverarbeiten. Es können hierdurch besonders wirtschaftlich Karosserieteile für PKWs, Sportgeräte und auch Bauelemente für die Luft- und Raumfahrtindustrie hergestellt werden, wobei es auch möglich ist, beim Pressen weitere Befestigungselemente in die Pressform einzulegen und beim Herstellen des Bauteils fest mit dem Faserverbundwerkstoff zu verbinden.Sheet-like fiber-matrix semi-finished products are semi-finished products which consist of reinforcing fibers, mainly glass fibers or carbon fibers, which are impregnated with a plastic matrix. The matrix may be a thermoset or thermoplastic. Thermoplastic matrix semi-finished fiber matrix materials are often referred to as SMC (Sheet Molding Compound). Fiber-matrix semi-finished products with a thermoplastic matrix are available in particular as LFT (long-fiber reinforced thermoplastics) and as GMT (glass mat reinforced thermoplastics). The fiber-matrix semi-finished products are mostly used in automated production processes for the production of fiber-plastic composite components. For example, use is made of thermoplastic matrix semi-finished products for door panels or luggage compartment covers for motor vehicles or the like, while SMC is used for the production of automotive exterior parts such as, for example, trim parts of truck tractors. The flat semi-finished products, in which the reinforcing fibers are usually present as cut fibers, but can also occur in mat or in fabric form, can be cut and further processed by means of extrusion to finished components. This makes it particularly economical body parts for cars, sports equipment and components for the air and Aerospace industry are produced, and it is also possible to insert additional fasteners in the mold during pressing and to connect firmly in the manufacture of the component with the fiber composite material.

Bei der Herstellung derartiger Halbzeuge wird das flächige, in langen Bahnen hergestellte Material meist auf einer Trägerfolie aus Polyamid oder Polyethylen angeordnet und dann entweder in Kartons gefaltet oder auf eine Haspel aufgewickelt. Bei den derzeit im allgemeinen eingesetzten Vorratshaspeln haben diese einen Wickelkern mit einem Durchmesser von üblicherweise 250 mm, auf dem dann eine Bahnlänge mit einem Gesamtgewicht von etwa 350 kg aufgewickelt wird. Derartige, jeweils 300 bis 350 kg des Halbzeugs tragende Vorratshaspeln werden dem das Material verarbeitenden Produzenten angeliefert, meist in einem Vorrats- und Transportregal, das vier solche Rollen aufnehmen kann, wo dann das Halbzeug von der Vorratshaspel abgewickelt und die Trägerfolie abgezogen wird, bevor ein Abschnitt der erforderlichen Länge des Halbzeuges in einer Presse od.dgl. zum fertigen Produkt umgeformt und ausgehärtet wird. Sobald das auf einer Rolle aufgewickelte Material vollständig verbraucht ist, müssen die Vorratshaspeln beim Produzenten und Verarbeiter des Materials gewechselt werden, was eine Unterbrechung der Produktion erzwingt. Nimmt man beispielsweise an, daß für jedes aus dem Halbzeug herzustellende Bauteil eine Menge von 20 kg verarbeitet werden und die Taktzeit für jedes Bauteil vier Minuten beträgt, erfordert dies einen Wechsel der mit ca. 300 kg bewickelten Vorratshaspeln nach nur einer Stunde.In the production of such semi-finished products, the flat material produced in long webs is usually arranged on a carrier film of polyamide or polyethylene and then either folded into cartons or wound onto a reel. In the currently generally used supply reels these have a winding core with a diameter of usually 250 mm, on which then a web length is wound with a total weight of about 350 kg. Such, each 300 to 350 kg of semi-finished supporting supply reels are supplied to the material processing producers, usually in a supply and transport shelf, which can accommodate four such roles, where then the semi-finished from the supply reel and the carrier film is withdrawn before a Section of the required length of the semifinished product in a press or the like. transformed into the finished product and cured. Once the material wound on a roll has been completely used up, the supply reels must be changed by the producer and processor of the material, which forces an interruption of the production. Assuming, for example, that for each component to be produced from the semifinished product an amount of 20 kg is processed and the cycle time for each component is four minutes, this requires a change of the approximately 300 kg of wound supply reels after only one hour.

Bei Anordnung des Halbzeuges in Kartons, in denen das Halbzeug zickzackförmig in einer Vielzahl von Lagen angeordnet wird, kann zwar mehr Material pro Verpackungseinheit gelagert und transportiert werden, nämlich bis zu ca. 1.000 kg, diese Vorgehensweise hat aber den Nachteil, daß das Material an den Knickstellen stark verformt wird und auch dazu neigt, dort auszutrocknen, so daß Fehler in den fertigen Bauteilen auftreten, wenn nicht die Bereiche um die Faltlinien vor der Verarbeitung des Halbzeugs abgeschnitten und ungenutzt entsorgt werden. Dies führt nicht nur zu einem hohen Materialverlust, sondern begrenzt die maximale Größe der aus dem Halbzeug herzustellenden Bauteile.When the semifinished product is arranged in cartons in which the semifinished product is arranged in a zigzag shape in a plurality of layers, more material per packaging unit can be stored and transported, namely up to about 1,000 kg, but this procedure has the disadvantage that the material adhere The kinks is greatly deformed and also tends to dry out there, so that errors in the finished components occur, if not cut off the areas around the fold lines prior to processing of the semifinished product and disposed of unused. This not only leads to a high material loss, but limits the maximum size of the components to be produced from the semifinished product.

Aus der EP 1 038 814 A2 ist ein Aufwickelsystem für Bahnen aus duroplastischen Compoundmassen bekannt, bei dem Transportrollen für Faser-Matrix-Halbzeuge zum Einsatz kommen, die eine Breite von 1,50 m und einen Durchmesser des Wickelkerns von 400 bis 600 mm aufweisen. Aufgrund des größeren Wickelkerns läßt sich auf solchen Transportrollen auch mehr bahnförmiges Faser-Matrix-Halbzeug aufwickeln als bei den bislang noch meist eingesetzten 350 kg-Rollen. Die Massen- und Größenverhältnisse bei derartigen Großrollen sind dieselben wie bei den Standardrollen, d.h. die Menge des auf den Wickelkern größeren Durchmessers aufwickelbaren Bahnmaterials ist direkt proportional zum Volumen des Wickelkerns. Während bei Standardrollen bei einem Wickelkerndurchmesser von 250 mm bis zu 350 kg SMC aufgewickelt werden können, lassen sich bei einer Großrolle mit einem Kerndurchmesser von 550 mm, also einem 4,84-mal so großem Volumen des Wickelkerns, 1.694 kg bevorraten. Bei diesem Lagerprinzip, bei dem eine große Menge SMC auf einem Wickelkern mit kreisrundem Querschnitt aufgewickelt wird, besteht die Gefahr, daß infolge des hohen Gewichts und der daraus entstehenden Flächenpressungen insbesondere auf die nah am Kern aufgewickelten Teile der Bahn ein Fließen der Kunststoffmatrix einsetzt und das von der Haspel abgewickelte Halbzeug dann kein über seine gesamte Länge konstantes Flächengewicht mehr hat.From the EP 1 038 814 A2 is a winding system for sheets of thermoset compound compounds known to be used in the transport rollers for fiber-matrix semi-finished products, which have a width of 1.50 m and a diameter of the winding core of 400 to 600 mm. Due to the larger hub can be wound on such transport rollers also more web-shaped fiber-matrix semifinished than in the hitherto still mostly used 350 kg rollers. The mass and size ratios in such large rolls are the same as in the standard rolls, ie, the amount of wound onto the winding core larger diameter web material is directly proportional to the volume of the winding core. While standard rolls with a core diameter of 250 mm can be wound up to 350 kg SMC, a large roll with a core diameter of 550 mm, ie a 4.84 times as large volume of the winding core, can store 1.694 kg. In this bearing principle, in which a large amount of SMC is wound on a winding core with a circular cross-section, there is a risk that flows due to the high weight and the resulting surface pressures, especially on the wound close to the core parts of the web flow of the plastic matrix and the from the reel unwound semi-finished product then no over its entire length constant basis weight more.

Aufgabe der Erfindung ist es, ein Verfahren und eine zu dessen Durchführung besonders geeignete Vorratshaspel zu schaffen, womit eine größere Menge bahnförmigen Halbzeugs als bei den bislang hauptsächlich eingesetzten Standardgebinden bevorratet werden kann, ohne daß hierunter die Flächengewichtskonstanz des auf der Haspel aufgewickelten Materials leidet.The object of the invention is to provide a method and a particularly suitable for carrying out supply reel, whereby a larger amount of sheet-like semifinished than in the hitherto mainly used standard containers can be stored without this undermines the basis weight constancy of wound on the reel material.

Diese Aufgabe wird mit dem erfindungsgemäßen Verfahren dadurch gelöst, daß das flächige, bahnförmige Halbzeug auf eine Vorratshaspel mit einem im Querschnitt unrunden, zu zwei zueinander senkrechten Halbachsen unterschiedlicher Größe symmetrischen Wickelkern aufgewickelt wird und daß die Vorratshaspel nach dem Aufwickeln des Halbzeugs auf den Wickelkern und vor dem Abwickeln des Halbzeugs im wesentlichen so ausgerichtet wird, daß die größere der beiden Halbachsen zumindest annähernd parallel zur Horizontalen verläuft. Demgemäß ist die erfindungsgemäße Vorratshaspel dadurch gekennzeichnet, daß der Wickelkern der Haspel einen unrunden, zu zwei zueinander senkrechten Halbachsen unterschiedlicher Größe symmetrischen Querschnitt aufweist. Der Wickelkern kann beispielsweise einen im wesentlichen elliptischen oder ovalen Querschnitt haben. Das Größenverhältnis der größeren Halbachse zur kleineren Halbachse liegt vorzugsweise im Bereich von 1,25 bis 3, insbesondere im Bereich zwischen 1,35 und 2,75. Es ist beispielsweise möglich, daß die größere Halbachse eine Länge zwischen 225 und 325 mm hat und die kleinere Halbachse eine Länge zwischen 125 und 220 mm aufweist.This object is achieved by the method according to the invention in that the flat, sheet-like semi-finished product wound onto a supply reel with a non-round in cross section, symmetrical to two mutually perpendicular half-axes of different winding core is and that the supply reel is substantially aligned after winding of the semifinished product on the winding core and before unwinding of the semifinished product that the larger of the two half-axes extends at least approximately parallel to the horizontal. Accordingly, the supply reel according to the invention is characterized in that the winding core of the reel has a non-circular, symmetrical to two mutually perpendicular half-axes of different sizes cross-section. The winding core may, for example, have a substantially elliptical or oval cross-section. The size ratio of the larger half-axis to the smaller half-axis is preferably in the range of 1.25 to 3, in particular in the range between 1.35 and 2.75. It is for example possible that the larger half-axis has a length between 225 and 325 mm and the smaller half-axis has a length between 125 and 220 mm.

Der Wickelkern kann auch einen etwa rautenförmigen, in den Eckbereichen abgerundeten und/oder abgeflachten Querschnitt aufweisen, wobei der Querschnitt des Wickelkerns in den Scheitelbereichen der größeren Halbachsen vorzugsweise etwa kreissegmentförmig abgerundet und in den Scheitelbereichen der kleineren Halbachsen vorteilhafterweise mit etwa parallel zu den größeren Halbachsen verlaufenden Abflachungen versehen ist, die unter Bildung von Radien bzw. Kreisbögen in die benachbarten Seiten der rautenförmigen Grundform übergehen. Eine derartige Gestaltung läßt sich beispielsweise aus miteinander verschweißten Stahlsegmenten einfach herstellen. Ein solcher Wickelkern ist z.B. aus der GB 2 296 229 A bekannt.The winding core may also have an approximately diamond-shaped, rounded in the corners and / or flattened cross-section, wherein the cross section of the winding core in the apex areas of the larger half-axes preferably rounded approximately circular segment and extending in the apex areas of the smaller half-axes advantageously with approximately parallel to the larger half-axes Flattening is provided, which merge with the formation of radii or circular arcs in the adjacent sides of the diamond-shaped basic shape. Such a design can be easily produced, for example, from welded steel segments. Such a winding core is for example from the GB 2 296 229 A known.

Eine Vorratshaspel nach der Erfindung kann mit dem auf dem Wickelkern aufgewickelten Halbzeug in einem Lager- und/oder Transportgestell angeordnet und darin gegen Verdrehen fixiert werden. Bei der erfindungsgemäßen Lagerung des Halbzeugs auf dem Wickelkern mit unrundem, insbesondere ovalem oder elliptischem Querschnitt wird ein größerer Anteil des Gewichts der aufgewickelten Bahn unmittelbar in den Wickelkern abgetragen, womit die von dem Material selbst aufzunehmenden Zugkräfte reduziert werden und auch die Druckbelastungen, die das Material aufzunehmen hat, geringer sind als bei einer Vorratshaspel mit zylindrischem Wickelkern, auf der dieselbe Menge des Halbzeugs aufgewickelt ist.A supply reel according to the invention can be arranged with the wound on the winding core semi-finished in a storage and / or transport rack and fixed therein against rotation. In the inventive storage of the semifinished product on the winding core with non-circular, in particular oval or elliptical cross section, a larger proportion of the weight of the wound web is removed directly into the winding core, whereby the absorbed by the material itself tensile forces are reduced and the pressure loads that the material has less than a supply reel with a cylindrical winding core on which the same amount of semifinished product is wound up.

Beim Auf- und Abwickeln des Materials auf die bzw. der erfindungsgemäße(n) Vorratshaspel mit im Querschnitt unrundem Wickelkern ist die Wickelgeschwindigkeit bei konstanter Drehgeschwindigkeit der Haspel nicht konstant. Um dem zu begegnen, ist es möglich, die Vorratshaspel zum Aufwickeln und/oder zum Abwickeln des Halbzeugs auf den bzw. von dem Wickelkern mit variabler Drehgeschwindigkeit anzutreiben. Tatsächlich hat es sich aber gezeigt, daß eine derartige Vorgehensweise in den meisten Fällen nicht erforderlich ist, denn das Auf- und Abwickeln des Materials erfolgt auch bei konstanter Antriebsgeschwindigkeit für die Haspel mit großer Zuverlässigkeit und Qualität.When winding up and unwinding the material onto the supply reel (s) according to the invention with a winding core which is not round in cross-section, the winding speed is not constant at a constant rotational speed of the reel. To counter this, it is possible to drive the supply reel for winding and / or unwinding of the semifinished product on or from the winding core with variable rotational speed. In fact, it has been shown that such a procedure is not required in most cases, because the winding and unwinding of the material takes place even with constant drive speed for the reel with great reliability and quality.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und der Zeichnung, worin bevorzugte Ausführungsformen der Erfindung anhand von Beispielen näher erläutert sind. Es zeigt:

Fig. 1
eine erste Ausführungsform der erfindungsgemäßen Vorratshaspel zur Verwendung in dem erfindungsgemä-ßen Verfahren in perspektivischer Darstellung;
Fig. 2
den Gegenstand der Fig. 1 in einem Querschnitt durch den Wickelkern der Vorratshaspel;
Fig. 3
einen stark schematisierten Vergleich einer Vorratshaspel mit rundem Wickelkern im Vergleich zu einer erfindungsgemäßen Vorratshaspel vergleichbarer Kapazität;
Fig. 4
eine zweite Ausführungsform der erfindungsgemäßen Vorratshaspel in einer Fig. 2 entsprechenden Darstellung; und
Fig. 5
den Wickelkern der Vorratshaspel nach der zweiten Ausführungsform gemäß Fig. 4 in einer gegenüber dieser vergrößerten Darstellung in Stirnansicht.
Further features and advantages of the invention will become apparent from the following description and the drawings, wherein preferred embodiments of the invention are explained in more detail by way of examples. It shows:
Fig. 1
a first embodiment of the supply reel according to the invention for use in the inventive method in a perspective view;
Fig. 2
the object of Fig. 1 in a cross section through the winding core of the supply reel;
Fig. 3
a highly schematic comparison of a supply reel with a round winding core compared to a supply reel according to the invention comparable capacity;
Fig. 4
a second embodiment of the supply reel according to the invention in one Fig. 2 corresponding representation; and
Fig. 5
the winding core of the supply reel according to the second embodiment according to Fig. 4 in a relation to this enlarged view in front view.

In den Zeichnungen bezeichnet 10 eine Vorratshaspel zum Aufwickeln und Bevorraten eines flächigen, bahnförmigen Halbzeugs 11, nämlich eines auf einer Trägerfolie (nicht dargestellt) angeordneten Faser-Matrix-Streifens mit duroplastischer Matrix, wie es auch unter der Bezeichnung "SMC" (Sheet Moulding Compound) bekannt ist.In the drawings, 10 designates a supply reel for winding and storing a flat, sheet-like semifinished product 11, namely a thermosetting matrix fiber matrix strip arranged on a carrier film (not illustrated), as it is also known under the name "SMC" (Sheet Molding Compound ) is known.

Die Vorratshaspel besteht im wesentlichen aus einem zentralen Wickelkern 12, der an seinen beiden stirnseitigen Enden mit Anlaufscheiben 13 versehen ist, die eine Beschädigung der Kanten des auf dem Wickelkern aufgewickelten Halbzeugs verhindern. Die Anlaufscheiben sind außenseitig mit hexagonalen Endplatten versehen, die nicht nur in besonderes einfacher Weise eine korrekte Oriendierung des Wickelkerns relativ zur Horizontalen beispielsweise beim Transport und der Lagerung der Haspel, sondern auch ein platzsparendes Stapeln ermöglichen.The supply reel consists essentially of a central winding core 12, which is provided at its two front ends with thrust washers 13, which prevent damage to the edges of the wound on the winding core semifinished product. The thrust washers are provided on the outside with hexagonal end plates, which allow not only in a particularly simple manner a correct Oriendierung the hub relative to the horizontal, for example, during transport and storage of the reel, but also a space-saving stacking.

Wie sich am besten aus den Fig. 2 bis 5 ersehen läßt, weist der Wickelkern einen unrunden Querschnitt auf, wobei er zu zwei zueinander senkrechten Halbachsen 14, 15 unterschiedlicher Größe symmetrisch ausgestaltet ist. Bei der in den Fig. 4 und 5 dargestellten Ausführungsform hat der Wickelkern 12 einen elliptischen Querschnitt, wobei das Größenverhältnis der größeren Halbachse 14 zur kleineren Halbachse 15 etwa 1,4 beträgt. Die Länge L der größeren Halbachse 14 beträgt bei beiden dargestellten Ausführungsbeispielen etwa 275 mm, die Länge l der kleineren Halbachse 15 liegt bei etwa 200 mm. Bei dem in den Fig. 1 und 2 dargestellten Ausführungsbeispiel ist die Querschnittsform des Wickelkerns 12 von einer Raute abgeleitet, die zur Illustration in Fig. 2 gestrichelt dargestellt und mit 16 bezeichnet ist. Ausgehend von dieser Grundform einer Raute ist der Wickelkern in seinen die großen Halbachsen 14 schneidenden Eckbereichen 17 mit vergleichsweise großem Radius abgerundet und in den die kleinen Halbachsen 15 schneidenden Scheitelbereichen 18 mit parallel zu der größeren Halbachse 14 verlaufenden Abflachungen 19 versehen, die unter Bildung von Radii 20 in die benachbarten Seiten 21 der rautenförmigen Grundform 16 übergehen.How best from the Fig. 2 to 5 can be seen, the winding core has a non-circular cross-section, wherein it is symmetrical to two mutually perpendicular half-axes 14, 15 of different sizes. In the in the 4 and 5 illustrated embodiment, the winding core 12 has an elliptical cross-section, wherein the size ratio of the larger half-axis 14 to the smaller half-axis 15 is about 1.4. The length L of the larger half-axis 14 is about 275 mm in both illustrated embodiments, the length l of the smaller half-axis 15 is about 200 mm. In the in the Fig. 1 and 2 illustrated embodiment, the cross-sectional shape of the winding core 12 is derived from a rhombus, the illustration in Fig. 2 shown by dashed lines and designated 16. Starting from this basic shape of a rhombus, the winding core is rounded in its major semiaxial 14 intersecting corner regions 17 with a comparatively large radius and in which the small half-axes 15 intersecting vertex areas 18 with parallel to the larger half-axis 14 extending flats 19, the formation of Radii 20 in the adjacent sides 21 of the diamond-shaped basic shape 16 pass.

Das auf die erfindungsgemäße Vorratshaspel mit im Querschnitt unrundem Wickelkern aufgewickelte Halbzeug 11 weist auch nach längerer Bevorratungsdauer von mehreren Tagen eine gegenüber einem Wickelkern mit kreisrundem Querschnitt (links in Fig. 3) bemerkenswert hohe Flächengewichtskonstanz auf, wenn die Lagerung entsprechend dem erfindungsgemäßen Verfahren so erfolgt, daß die das Halbzeug tragende Vorratshaspel so ausgerichtet wird, daß die größere der beiden Halbachsen 14 im wesentlichen parallel zur Horizontalen 22 verläuft, wie dies in Fig. 3 dargestellt ist. In einem ersten Versuch zur Überprüfung der Leistungsfähigkeit des ovalen/elliptischen Wickelkerns wurden etwa 2.000 Kg eines Faser-Matrix-Halbzeugs (SMC) mit der Handelsbezeichnung HUP MSF 227-9010 (32287) hergestellt, wovon 1.891 Kg auf den in den Fig. 1 und 2 dargestellten Wickelkern aufgewickelt wurden. Die Vorratshaspel wurde dann erfindungsgemäß für fünf Tage in einer Ausrichtung gelagert, in der die großen Halbachsen parallel zur Horizontalen verliefen. Das Material wurde nach fünf Tagen Lagerung auf herkömmliche Haspeln mit einem Kerndurchmesser von 250 mm umgewickelt. Das Materialgewicht auf den Standard-Vorratshaspeln betrug: Rolle 1: 364,5 kg Rolle 2: 357 kg Rolle 3: 370,5 kg Rolle 4: 353 kg Rolle 5: 371 kg The semifinished product 11 wound onto the supply reel according to the invention with a winding core which is not round in cross-section, even after a longer storage period of several days, has a relation to a winding core with a circular cross section (left in FIG Fig. 3 ) remarkably high basis weight constancy, when the storage according to the method according to the invention is carried out so that the semifinished supply reel is aligned so that the larger of the two semi-axes 14 is substantially parallel to the horizontal 22, as in Fig. 3 is shown. In a first attempt to test the performance of the oval / elliptical core, about 2,000 kg of a fiber-matrix semi-finished product (SMC) under the trade name HUP MSF 227-9010 (32287) was produced, of which 1,891 kg were in the Fig. 1 and 2 wound core were wound up. The supply reel was then stored according to the invention for five days in an orientation in which the large half-axes ran parallel to the horizontal. The material was rewound after 5 days storage on conventional reels with a core diameter of 250 mm. The weight of the material on the standard reels was: Role 1: 364.5 kg Roll 2: 357 kg Roll 3: 370.5 kg Roll 4: 353 kg Roll 5: 371 kg

Das von der erfindungsgemäßen Großhaspel mit ovalem/elliptischem Wickelkern abgewickelte Material in einer Menge von beinahe 1.900 kg wurde auf Verwerfen oder Verformung überprüft, während es auf die kleinen Rollen umgewickelt wurde. Keine Verwerfungen oder Verformungen konnten festgestellt werden. Die Qualität des Materials war mit der vergleichbar, wie sie von Standardrollen mit ca. 350 kg Nettogewicht regelmäßig erzielt wird.The material unwound from the oval / elliptical core reel according to the present invention in an amount of almost 1,900 kg was checked for warping or deformation while being wound on the small rolls. No distortions or deformations could be detected. The quality of the material was comparable to that regularly achieved by standard rolls of about 350 kg net weight.

Das Flächengewicht des von der erfindungsgemäßen Vorratshaspel abgewickelten Materials wurde ebenfalls an verschiedenen Positionen des Wickelkerns ermittelt. Hierzu wurden jeweils 100 cm2 große Probestücke aus der abgewickelten Halbzeugbahn herausgelöst. Die hieraus ermittelten Flächengewichte und ihre Abweichung bezogen auf das ursprüngliche Flächengewicht des Materials vor dem Aufwickeln auf der erfindungsgemäßen Vorratshaspel und Lagern über einen Zeitraum von fünf Tagen sind in Tabelle 1 wiedergegeben. Es ist ersichtlich, daß die Abweichungen zum Ursprungsgewicht, die im Bereich von ± 50 g pro m2 liegen, einen ausgezeichneten Wert darstellen, insbesondere wenn man berücksichtigt, daß sich beinahe 1.900 kg auf der erfindungsgemäßen Vorratshaspel befunden haben. Materiallänge/Prozent Position relativ zum Wickelkern Flächengewicht/g/m2 Abweichung/ Prozent 0 Oberseite 4096 2,4 25 Oberseite 4036 0,9 50 Oberseite 3988 -0,3 50 Unterseite 3988 -0,3 75 Oberseite 3994 -0,2 75 Unterseite 3988 -0,3 The basis weight of the material unwound from the supply reel according to the invention was likewise determined at different positions of the winding core. For this purpose, each 100 cm 2 large specimens were detached from the unwound semifinished product web. The basis weights determined therefrom and their deviation relative to the original weight per unit area of the material before being wound up on the supply reel according to the invention and storage over a period of five days are reproduced in Table 1. It can be seen that the deviations from the original weight, which are in the range of ± 50 g per m 2 , represent an excellent value, especially considering that nearly 1,900 kg were on the supply reel according to the invention. Material Length / Percent Position relative to the winding core Basis weight / g / m 2 Deviation / percent 0 top 4096 2.4 25 top 4036 0.9 50 top 3988 -0.3 50 bottom 3988 -0.3 75 top 3994 -0.2 75 bottom 3988 -0.3

Vergleichbare Werte wurden auch erzielt bei Lagerung des Materials auf der erfindungsgemäßen Vorratshaspel über eine vergleichsweise lange Zeitdauer von zwei Wochen. Auch in einem solchen Fall konnte kein Verwerfen und keine Verformung des über zwei Wochen gelagerten Materials beim Umwickeln auf andere (Standard) Rollen festgestellt werden. Die Abweichungen des Flächengewichtes gegenüber dem Ausgangswert lagen zwischen -2,2 und +3,5 %, wobei die Abweichungen im wesentlichen unabhängig von der relativen Lage des untersuchten Materials zum Spulenkern waren und angesichts einer aufgewickelten Menge von 1.700 kg und des vergleichsweise langen Lagerzeitraums als überraschend niedrig angesehen werden müssen.Comparable values were also obtained when the material was stored on the supply reel according to the invention over a comparatively long period of two weeks. Even in such a case, no warping and deformation of the material stored for more than two weeks when wrapping on other (standard) rolls could be detected. The deviations of basis weight from baseline were between -2.2 and + 3.5%, the deviations being essentially independent of the relative position of the tested material to the spool core, and given a wound amount of 1700 kg and the comparatively long storage period as must be considered surprisingly low.

Die Erfindung ist nicht auf die dargestellten und beschriebenen Ausführungsbeispiele beschränkt. Insbesondere sind auch andere Querschnittsformen des Wickelkerns denkbar, beispielsweise ein ovaler Querschnitt, insbesondere auch solche Querschnitte, bei denen das Verhältnis der Längen der größeren Halbachse zur kleineren Halbachse noch deutlich größer ist als bei den dargestellten und beschriebenen Beispielen. Es hat sich gezeigt, daß es zum Aufwickeln des bahnförmigen Materials auf die erfindungsgemäße Vorratshaspel nicht unbedingt erforderlich ist, die Rotationsgeschwindigkeit der Haspel während einer Umdrehung zu variieren, um dem sich ändernden Wickelradius Rechnung zu tragen. Eine derartige Variation der Drehgeschwindigkeit der Haspel kann aber dann Sinn machen, wenn sich die Größen der beiden Halbachsen deutlich voneinander unterscheiden, um der dann etwas größeren Gefahr einer Faltenbildung beim Aufwickeln zu begegnen.The invention is not limited to the illustrated and described embodiments. In particular, other cross-sectional shapes of the winding core are conceivable, for example, an oval cross section, in particular those cross sections in which the ratio of the lengths of the larger half axis to the smaller half axis is still significantly greater than in the illustrated and described Examples. It has been found that it is not absolutely necessary for winding the web-like material on the supply reel according to the invention to vary the rotational speed of the reel during a revolution in order to take into account the changing winding radius. Such a variation of the speed of rotation of the reel can make sense, however, if the sizes of the two semi-axes clearly differ from each other to meet the then slightly greater risk of wrinkling during winding.

Claims (11)

  1. Method for storing sheet-like, web-form fibre-matrix semi-finished products having a thermosetting or thermoplastic matrix, wherein the sheet-like, web-form semi-finished product (11) is wound onto a storage reel (10) having a winding core (12) that is non-round in cross section and is symmetrical to two half-axes (14, 15) of different size that are perpendicular to one another, characterized in that the storage reel (10), after the semi-finished product (11) has been wound on to the winding core (12) and before the semi-finished product is unwound, is oriented substantially such that the larger of the two half-axes (14) extends at least approximately, parallel to the horizontal (22).
  2. Method according to Claim 1, characterized in that the storage reel (10) with the semi-finished product (11) wound onto the winding core (12) is arranged in a storage and/or transport rack and is fixed therein against twisting.
  3. Method according to Claim 1 or 2, characterized in that after the semi-finished product (11) has been partially unwound or drawn off the storage reel (10), the latter is stopped again in a position in which the larger of the two half-axes (14) of the winding core (12) is located at least approximately parallel to the horizontal (22).
  4. Method according to one of Claims 1 to 3, characterized in that the storage reel (10) for winding and/or unwinding the semi-finished product (11) onto or off the winding core (12) is driven at a variable rotational speed.
  5. Method according to one of Claims 1 to 4, characterized in that the winding core (12) has a substantially elliptical or oval cross section.
  6. Method according to one of Claims 1 to 5, characterized in that the ratio of the size of the larger half-axis (14) to the size of the smaller half-axis (15) is in the range between 1.25 and 3.
  7. Method according to Claim 6, characterized in that the ratio of the size of the larger half-axis (14) to the size of the smaller half-axis (15) is in the range between 1.35 and 2.75.
  8. Method according to one of Claims 1 to 7, characterized in that the larger half-axis (14) has a length (L) of between 225 and 325 mm and the smaller half-axis (15) has a length (1) of between 125 and 220 mm.
  9. Method according to one of Claims 1 to 8, characterized in that the winding core (12) has an approximately diamond-shaped cross section which is rounded and/or flattened in the corner regions.
  10. Method according to Claim 9, characterized in that the cross section of the winding core (12) is rounded approximately in the form of a circular segment in the apex regions (17) of the larger half-axis (14) and is provided in the apex regions (18) of the smaller half-axis (15) with flattened portions (19) that extend approximately parallel to the larger half-axis (14), said flattened portions (19) merging into the adjacent sides (21) of the diamond-shaped basic form (16), forming radii (20) or circular arcs.
  11. Method according to one of Claims 6 to 10, characterized in that the winding core (12) consists of steel segments that are welded together.
EP08033515A 2007-04-19 2008-04-09 Method for storing flat, sheet-like semi-finished products Not-in-force EP1982938B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007018921A DE102007018921A1 (en) 2007-04-19 2007-04-19 Method for stocking flat, sheet-like semi-finished products and supply reel for flat, sheet-shaped semi-finished products

Publications (2)

Publication Number Publication Date
EP1982938A1 EP1982938A1 (en) 2008-10-22
EP1982938B1 true EP1982938B1 (en) 2011-05-18

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Publication number Priority date Publication date Assignee Title
CN104176564A (en) * 2014-08-20 2014-12-03 常州常利来电子有限公司 Tin wire reel
CN111792418B (en) * 2020-07-20 2022-04-29 泉州盛协科技有限公司 A winding machine for flexible flat glass and its winding method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2299113A (en) * 1939-12-08 1942-10-20 William F Stahl Coil form and the like
DE3314489A1 (en) * 1983-04-21 1984-10-25 Continental Gummi-Werke Ag, 3000 Hannover Winding sleeve for rubber strip
GB2296229A (en) * 1994-12-20 1996-06-26 Alform Extrusions Ltd Winding drum
DE19710331C2 (en) * 1997-03-13 2001-10-04 Beiersdorf Ag Winding core
EP1038814B1 (en) 1999-03-23 2004-06-02 Menzolit-Fibron GmbH Winding system for webs of duroplastic compound
DE19913032A1 (en) * 1999-03-23 2000-09-28 Menzolit Fibron Gmbh Winding system for thermosetting compound masses, especially SMC sheets
JP4198590B2 (en) * 2001-07-11 2008-12-17 株式会社ブリヂストン Storage method for long plastic deformation member and storage device for long plastic deformation member
US20060180702A1 (en) * 2004-11-08 2006-08-17 Pfeifer Thomas A Tubular interconnecting support structure

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DE102007018921A1 (en) 2008-10-30
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