DE1479529A1 - Method for separating foils or the like. as well as device for carrying out the process - Google Patents

Description

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Winfried Nickert, Baldham at! Whitewash, Hochrißstrasse 33

Method for separating foils or the like and device for carrying out the method

The invention relates to a method for separating films or the like as well as a device for performing the method, specifically in the context of a machine production.

Foils are kept in stock in rolls of a certain width and represent in this form the starting material for a wide variety of manufacturing processes ο This is how the Foil clamped in the machine is used, for example, to conceal already printed sheets so that they have a smooth · and Get a glossy top layer »Since the width of the sheet often does not match the width of the film, the film has to be cut accordingly special film cutting machine is used in which the roll is clamped and which has a fixed knife that engages in the tensioned film in order to cut it during the process had to switch on a special production process in order to obtain a suitable roll of film, which was then clamped into the processing machine, for example the laminating machine already mentioned.

This previously common method is, however, from a different one Basically disadvantageous The knife engaging in the tensioned film running off the roll often causes wrinkles and thus an unclean cut and, under certain circumstances, an undesirable permanent local film deformation

These disadvantages are avoided by the method according to the invention.

909820/101 ]

The invention relates to a method of the type described at the outset Art. According to the invention, the roll of film to be cut is placed in the processing machine (laminating machine, coating machine or derglo) and before unwinding by one or more hessers supported on this roll of film severed.

A particularly advantageous device for carrying out the method has a separating knife which is pivotably mounted on a lever arm and to which a coaxial support roller is assigned, the diameter of which is twice the binding ring depth of the separating knife in the film roll and which rests on the film roll ₀

The lever arm of the cutting knife is expediently mounted pivotably on an axis which is parallel to the take-up shaft of the film roll is arranged »

Further features and advantages of the invention are set out below Explained on the basis of the exemplary embodiments of the invention shown in the drawing * namely:

Fig «. 1 shows a horizontal section through an inventive Contraption,,

Figo 2 shows a vertical longitudinal section through the same device and

3 shows a simplified schematic representation of a section of a processing machine with a film roll and Separator *

According to FIGS. 1 and 2, the circular disk-shaped cutting knife 2 is attached to one side of the front end of the lever 1, while the support roller 3 is rotatably mounted on a pin 4 of the lever 1 on the opposite side of this end of the lever. In order to ensure that the support roller 3, which, as shown in FIG. 3, lies on the film roll 6 while the film 5 is running, practically no tangential force exerts on the same, the support roller 3 is used as a roller bearing It is also useful to provide the outer ring of this roller bearing with an elastic Umo jacket 7, which provides a resilient support of the cutting - "knife 2" This measure is important because the film rolls are often not completely smooth are wound up »

the small depressions at different points of its depth, Show bumps or similar deformations, an inelastic Support roller 3 was precisely these deviations from the cylindrical shape follow, and since the cutting knife 2 in turn follows the support roller 3, there would be fluctuations in the Sonittlef e and thus in the cutting force, which "reload the uniform. Could affect the run of the slide 5 «.

The cutting knife 2 is fastened to the front end of the lever 1 by means of the screws 8. Instead, only one could be used only central screw for clamping this cutting knife 2 use". If it turns out during operation that the knife edge has become blunt, you only need to loosen the screw connection of the cutting knife 2, turn it by a certain circumferential angle and tighten the screw connection again «. There is now a sharply ground cutting edge section for the further cut available. A regrinding of the cutting knife 2 therefore only needs to be carried out when all circumferential sections of the circular cutting knife are consecutively were engaged.

The lever 1 carrying the cutting knife 2 together with the support roller 3 is mounted at its other end via a sleeve 8 on the axis 9, which is parallel to the shaft 10 on which the film roll 6 sits, is arranged. After the device on the shaft 9 ia the position corresponding to the desired film width has been pushed, the pressure screw 11 is tightened and the working position of the cutting knife 2 is fixed. The one on the sleeve β free The pivotable lever 1 is then folded around so that the support roller 3 lies on the film roll 6. The device according to the invention is now in the operating position *

The method according to the invention for separating the film 5 then proceeds as follows:

First, the starting edge of that hollen section, the is not yet to be processed, connected to the roller body as a precaution, which can be done, for example, by means of an adhesive strip. In the embodiment according to FIG. 3, this is the right roll section (seen from the viewer). Then the film roll 6 is rotated a few times by $ qnd, so that the beginning

II /

of the film strip is cut and runs in the desired width. The film 5 running in this way is now inserted _{in the usual way into the part of the processing machine 9} , not shown here, for example the already mentioned meat cutting machine ₉ be switched on, and the film 5 runs continuously in the required width from the film roll 6, the cutting knife 2 constantly cutting into the rotating film roll 6 due to the weight of the device according to the invention the support roller 3 and the cutting diameter of the cutting knife 2 "It is equal to half the _{difference in diameter o} Any local deviations of the outer surface of the film roll 6 from the cylindrical shape are compensated for by the elastic coating 7 of the support roller 3"

After the left part of the film roll 6 has been cut off and processed in this way, the unwound right part can be taken back to stock and, if necessary, processed in the same way. _c , if a film is required «whose width is smaller than the width of the rest of the roll part ο

Patent claims 909820/1011 ~~

- 5 ~ ORJGUNAL INSPECTED

Claims (7)

ι, Ί 4 / y ο 2 9 Claims / I)) A method of separating sheets or the like _n characterized in Rollenforfflg in that inserted the (to be cut film roll (6) in the processing machine laminating machine, Be-layering machine or the like) and in front of the unwinding by one or more supported on this film roll separating knife (2) is severed « 2) Device for performing the method according to claim 1, characterized by a circular bevel-shaped cutting knife (2), the let [and the one coaxial support roller (3) is assigned, the outer diameter of which by twice the depth of the cutting knife (2) in the film roll (6) is smaller than the outer diameter of the same and the rests on the film roll (6) 3) Device according to claim 2 “characterized in that the lever arm (1) on an axis (9) which is arranged parallel to the take-up shaft (10) of the film roll (6) in the processing machine is, is pivoted " 4) Device according to claim 2 and 3 _S, characterized in that the lever arm (1) can be locked on its axis (9) by a pressure screw (11) 5) Device according to claim 2 to 4, characterized in that the cutting knife (2) can be locked in different angular positions and within its cutting plane «. 6) Device according to claim 2 to 5 »characterized in that the support roller (3) has an elastic casing (7)« 7) Device according to claim 2 to 6, characterized in that the support roller (3) by means of a roller bearing on a pin (4) is mounted, which is coaxial with the axis of rotation of the cutting knife (2) lies. 909820/101 1 ORIGINAL INSPECTBÄ