DE2305653B1

DE2305653B1 - METHOD OF WINDING A MULTILAYER TAPE STRIP ON A CYLINDRICAL FLANGED REEL

Info

Publication number: DE2305653B1
Application number: DE19732305653
Authority: DE
Inventors: Stefan Berger
Original assignee: JUWEL FILMTECHNIK INGE BERGER
Current assignee: JUWEL FILMTECHNIK INGE BERGER
Priority date: 1973-02-06
Filing date: 1973-02-06
Publication date: 1974-03-14
Also published as: DE2305653A1; DE2305653C2

Description

Dem Erfindungsgedanken liegen umfangreiche Versuche zugrunde, in deren Verlauf mittels einer Aufwickelvorrichtung, die derjenigen für elektrische Spulen angenähert ist, systematisch unterschiedliche Relativwerte der Randüberlappungsbreite eingestellt wurden. Es zeigte sich hierbei, daß bei Einstellung einer zu großen Randüberlappungsbreite der Tonbandstreifen das Bestreben zeigt, sich auf einer bestimmten Windung mehrlagig aufzubauen und dann zusammenzufallen, wodurch zwangläufig ein Verklemmen des Streifens beim Abwickeln an dieser Stelle entsteht. Bei Einstellung einer zu geringen Randüberlappungsbreite besteht die Möglichkeit, insbesondere unter Berücksichtigung der Eigenelastizität des Tonbandstreifens, daß die Randüberlappungsbreite einer bestimmten betrachteten Windung durch Abgleiten verschwindet und in einer benachbarten Windung dafür eine stärkere Randüberlappungsbreite entsteht, was ebenfalls schädlich ist, weil sich hierdurch eine ungleichmäßige Bewicklung und damit wiederum die Gefahr eines Verklemmens des Tonbandstreifens ergibt. Lediglich in dem ertindungsgemäß ermittelten Randüberlappungsbereich ergab sich eine stabile Bewicklung, welche die notwendige Sicherheit gegenüber einem Verklemmen des Tonbandstreifens beim Abwickeln erbrachte. The concept of the invention is based on extensive experiments in the course of which by means of a winding device that of the one for electrical Coils is approximated, systematically different relative values of the edge overlap width were discontinued. It turned out that when one was employed, too large a Edge overlap width of the tape strips shows the tendency to focus on a certain Build up winding in several layers and then collapse, which inevitably leads to a Jamming of the strip when unwinding occurs at this point. When hiring there is a possibility that the edge overlap width is too small, especially under Consideration of the inherent elasticity of the tape strip that the edge overlap width of a certain considered turn disappears by sliding and in one adjacent turn creates a greater edge overlap width, which is also the case is harmful because this results in an uneven winding and in order to in turn there is a risk of the tape strip jamming. Only in the edge overlap area determined according to the invention resulted in a stable one Wrapping that provides the necessary security against jamming of the tape strip provided during unwinding.

Gemäß einer bevorzugten Anwendungsform des erfindungsgemäßen Verfahrens beträgt die Breite des Tonbandstreifens 0,785 + 0,02 - 0,04 mm. Als erfindungsgemäß günstige Randüberlappungsbreite jeder einzelnen Windung ergab sich für einen solchen Tonbandstreifen ein Wertebereich von 0,70 bis 0,74 mm, besser 0,71 bis 0,72 mm. According to a preferred embodiment of the method according to the invention the width of the tape strip is 0.785 + 0.02 - 0.04 mm. As according to the invention favorable edge overlap width of each individual turn resulted for such a Tape strips have a value range of 0.70 to 0.74 mm, better 0.71 to 0.72 mm.

Weist der Flanschspulenkörper einen Durchmesser von 115 mm, eine lichte axiale Bewicklungsbreite von 20 mm und eine radiale Flanschbreite von zumindest 5 mm auf, so kann ein solcher Flanschspulenkörper mit einem Tonbandstreifen von mehr als 1100 mm bewickelt werden, wobei der Spulendurchmesser im bewickelten Zustand 125 mm beträgt. If the flange bobbin has a diameter of 115 mm, a clear axial winding width of 20 mm and a radial flange width of at least 5 mm, such a flanged bobbin with a tape strip of more than 1100 mm can be wound, the spool diameter in the wound state 125 mm.

Das erfindungsgemäße Verfahren läßt sich vorteilhaft durch geringfügige Abwandlung einer üblichen Aufwickelvorrichtung durchführen, die einen Schneidkopf zum Auftrennen eines Tonbandes in mehrere Tonbandstreifen gleicher Breite sowie eine entsprechende Anzahl von Haltern für Flanschspulenkörper umfaßt, wobei die Flanschspulenkörper über zumindest eine Rutschkupplung mit einer auf den unbewickelten Spulendurchmesser bezogenen, gegenüber der Vorschubgeschwindigkeit des Schneidkopfes höheren Umfangsgeschwindigkeit angetrieben sind, um die einzelnen Tonbandstreifen stets unter einer gewissen Spannung während des Aufwickelvorgangs zu halten. Die Vorrichtung ist dabei so abgewandelt, daß zumindest eine den Tonbandstreifen zugeordnete Verlegevorrichtung mit ihrer periodisch reversierbaren Verlegegeschwindigkeit in Axialrichtung der Flanschspulenkörper auf einen geringeren Wert als die Mindestverlegegeschwindigkeit beim nichtüberlappenden Aufwickeln von Tonbandstreifen eingestellt ist. The process according to the invention can be advantageously carried out by minor Carry out modification of a conventional winding device, which has a cutting head for cutting a tape into several tape strips of the same width and comprises a corresponding number of holders for flange bobbins, the Flanged bobbin via at least one slip clutch with one on the unwound Relative to the reel diameter, compared to the feed speed of the cutting head higher peripheral speed are driven to the individual tape strips always kept under a certain tension during the winding process. the The device is modified so that at least one of the tape strips is assigned Laying device with its periodically reversible laying speed in Axial direction of the flange bobbin to a value lower than the minimum laying speed is set for non-overlapping winding of tape strips.

Die Erfindung ist nachstehend an Hand der Zeichnung näher erläutert, welche ein Ausführungsbeispiel eines zylindrischen Flanschspulenkörpers im Axialschnitt sowie in bruchstückweiser Darstellung zeigt, auf dem drei Lagen eines Tonbandstreifens nach dem erfindungsgemäßen Verfahren gewickelt sind. The invention is explained in more detail below with reference to the drawing, which shows an embodiment of a cylindrical flange bobbin in axial section and shows in fragmentary representation, on which three layers of a tape strip are wound by the method according to the invention.

Die Ausstellwinkel der Flächen der Windungen des Tonbandstreifens sind der besseren Übersicht halber übertrieben steil dargestellt. Es versteht sich auch, daß beim Überwickeln einer Lage des Tonbandstreifens eventuell vorhandene kleine Hohlräume zusammengedrückt werden.The angles of exposure of the surfaces of the turns of the tape strip are shown exaggeratedly steep for the sake of clarity. It goes without saying also that when overwinding a layer of the tape strip that may be present small cavities are squeezed together.

Von dem in der Zeichnung dargestellten Spulenkörper S ist lediglich ein kleiner axialer Bereich nahe einem von zwei Flanschen F veranschaulicht (der FlanschF selbst ist ebenfalls mit einer reduzierten radialen Flanschbreite abgebrochen dargestellt). Of the bobbin S shown in the drawing is only illustrates a small axial area near one of two flanges F (the FlangeF itself is also broken off with a reduced radial flange width shown).

Auf den Flanschspulenkörper S ist ein Tonbandstreifen TS gewickelt, bei dem die einzelnen Windungen innerhalb jeder Wicklungslage die vorangehend bereits angegebenen Werte einer RandüberlappungsbreiteR aufweisen. Die BreiteB des Tonbandstreifens beträgt, wie bereits erwähnt wurde, bevorzugt 0,785 mm, wobei mehrere Tonbandstreifen gleichzeitig durch Auftrennen eines demgegenüber breiteren Tonbandes in einem einzigen Arbeitsgang mittels eines an sich bekannten Schneidkopfes gewonnen werden. A tape strip TS is wound on the flange spool S, in which the individual turns within each winding layer are the previous ones have specified values of an edge overlap width R. The width B of the tape strip is, as already mentioned, preferably 0.785 mm, with several tape strips at the same time by splitting a, in contrast, wider tape into a single one Operation can be obtained by means of a cutting head known per se.

Die in der Zeichnung dargestellte und nach dem erfindungsgemäßen Verfahren erzielbare Bewicklung erweist sich als sehr stabil und zeigt keinerlei Neigung zum unregelmäßigen Zusammenfallen und damit zum Verklemmen des Tonbandstreifens TS. The shown in the drawing and according to the invention Process achievable wrapping proves to be very stable and does not show any Tendency to collapse irregularly and thus to jamming of the tape strip TS.

Claims

Claims: 1. Method for multi-layer helical winding a narrow tape strip with a standardized width of less than 1 mm and a usual thickness on a cylindrical flange bobbin, its axial The width of the wrapping is many times greater than the width of the strip, characterized in that that the tape strip with an edge overlap width of each individual turn from 89 to 94010 of the strip width, better 91 to 93 0 / o, is wound.

2. The method according to claim 1, characterized in that at one standardized width of the tape strip of 0.8 + 0.0 to 0.02 mm and a thickness of about 35 u the edge overlap width in the individual turn 0.70 to 0.74 mm, better 0.71 to 0.72mm.

3. Application of the method according to claim 1 or 2 to a tape strip with a width of 0.785 + 0.02 - 0.04 mm.

The invention relates to a method for multi-layer helical Winding up a narrow strip of tape with a standardized width of less than 1 mm and a normal thickness on a cylindrical flange bobbin, whose axial winding width is many times greater than the width of the strip is.

At present, feature films with a soundtrack are being made on a large scale a blank tape strip provided, which has a standardized width of 0.8 + 0.0 - 0.1 mm. A tape strip of such width can do without Difficulties in a continuous process on films of a standard width glued in an area between the individual images and the image perforation and recorded when the film is running. The blank tape strips must wound on cylindrical flange bobbins are available in known devices to be able to carry out the sticking process on the cinema film.

Usually the tape strips are on flange spools wound, their axial winding width (apart from a slight clear Oversize) corresponds to the width of the strip. So it is very axial short flange bobbins, which flanges with a relatively very large The outer radius must have a sufficient length of the unrecorded tape strip to accommodate, which is present on the flange spool in the form of a spiral However, it is taking into account the given tape strength as well as one maximum permissible outer radius of the flange bobbin for processing in the known gluing devices not possible, more than about 200 m of the tape strip to be accommodated on a flange bobbin. It must accordingly be the gluing device frequently stopped after unwinding a tape from a Flanged bobbin a insert new flange bobbin in the device.

It is already known (German Patent 860 870) on one Flanged bobbin of a given maximum outer radius a greater length of a Tape tape with a width of 2 to 4 mm to accommodate by the axial Wrapping width of the flange spool using a laying device manufactured many times larger than the strip width and the tape strip inside each layer in a large number of turns with strip contact of the individual turns is wound up, similar to the winding of an electrical coil in layers Copper wire. It has been shown, however, that this type of winding can be used for widths of the tape strip of less than 1 mm is very difficult to control because the tape strips have a tendency to jam when unwinding and thus to tear shows. A tearing of the tape strip must be avoided under all circumstances because there is no gap between the tape strips and no interfering noise is practically impossible when the movie is running.

For this reason, only a few tape strips have been used so far a width of less than 1 mm on a cylindrical flange bobbin with a plurality of turns of the tape strip contained within a winding layer wound up, the tape strips by hand by very experienced staff was relocated. In spite of the most careful laying of the tape, however, was able to this manual winding process because of the associated risk of tearing Handling and the need to employ very experienced staff is not a comprehensive one Find entry into technology.

The object of the invention is to create a compared to the prior the technique improved method, which a multilayer winding of a narrow Tape strips less than 1 mm wide on a cylindrical flange spool allows, with a plurality of turns of the within each winding layer Tape strips can be accommodated next to each other. This is achieved by that the tape strip in an edge overlap width of each individual turn from 89 to 94% of the strip width, better 91 to 93%, is wound.