DE7916770U1 - HEATABLE KNIFE ARRANGEMENT IN A ROLL CUTTING MACHINE - Google Patents

Description

HEATABLE KNIFE ARRANGEMENT IN A ROLLER CUTTING MACHINE

The invention relates to a knife arrangement in a roll cutting machine, with paired upper and lower knives that work on a lower knife shaft or a for this purpose adjustable upper cutter shaft are axially adjustable.

The object of the invention is to make such a conventional knife arrangement useful for slitting Paper or plastic film that is coated or impregnated with an adhesive.

For this purpose, the adhesive must be softened by heating aes upper knife during the cutting process, so that the material to be cut does not get caught between the knife edges and tear.

For a squeeze knife holder it is from this side

Verbal agreements, especially by telephone. ^ Require written confirmation.

Postal check account Fiankfurt / fvUn *] r. 141046-602

Offenlegungsschrift 2716703 known a radiant heater to be accommodated in the filter housing; However, not all types of adhesive films can be cut long with Instead, sensitive foils have to be cut in a roll cutting machine of the type mentioned at the outset are cut, the upper knife of which is not individually fitted with knife holders but together the upper knife shaft raits against the Lower blades are employed.

Ura, here too, economical individual heating of the upper knives According to the invention, a knife arrangement is also available of the type mentioned at the outset suggested that above the upper auger shaft and parallel to it a shaft is lockably mounted, are arranged axially adjustable on the pivot arms, on each of which a radiant heater so uptight that he is the cutting edge of an employee Oberme3sers spills over part of their ümfangea.

This shaft is rotated in the same direction with the adjusting movement of the upper blade shaft so that all radiant heaters simultaneously aer Anstollbewegung their associated öDerraesser can follow · \ x * \ r \: ch heating is not delayed the Anstellvorgang duj?.

The radiant heater can be a resistive element in a known manner be, preferably surrounded by a reflector, or it can be designed as an induction coil. The latter results in particularly low-loss heating, because the heat is practically only generated in the thin cutting area of the nibbler .

Further embodiments of the invention relate to the longitudinal direction and swivel direction adjustable interchangeable attachment of the connection end of the radiant heater its associated swivel arm.

The invention should be further explained with reference to the exemplary embodiment shown schematically in the figures. Show it

1 shows an end view of a pair of blades with an associated heating device and

Fig. 2 shows a section in the plane II / II Fig. 1

The sleeve-shaped lower cutter 3 sit axially adjustable on the lower cutter shaft 1, the upper cutter 5 with their hubs 4 axially adjustable on the upper cutter shaft 2. The latter is set against the lower cutter shaft 1 in the operating position shown, and the additional shaft 14 according to the invention is in the counter-clockwise direction with the rotated on her adjustable swivel arms 10 downwards, so that the radiant heater 7 fixed thereon each overlap the cutting edge 6 of the associated outer cutter 5 on part of its circumference.

The radiant heater 7 shown consists of the tubular resistance element 8 and the reflector 9, which is fixed at the connection end with the screw connection 11 on the weaker lower part of the swivel arm 10. By loosening the screw connection 11, the reflector 9 can be folded up, for example in order to be able to replace the heating resistor 8. The latter is also rotatably attached to the thinner lower part of the swivel arm 10, in a transverse bore of the cylindrical block 12, and can be displaced therein and locked by the screw 13. 0er cylindrical block 12 is axially connected by the screw / 15 to the swivel arm 10, so that in the operating position shown for all pairs of knives, each heating element 8 and its reflector 9 can be individually adjusted with the smallest possible movement gap relative to the cutting edge of the associated upper knife 5.

Claims (4)

EXPECTATIONS 1. Knife arrangement in a slitter winder, with paired upper and lower knives, which are axially adjustable on a submarine shaft or a parallel upper cutter shaft that can be adjusted to it, characterized in that a shaft (14) is mounted in a lockable manner above the upper cutter shaft (2) and parallel to it is, on the swivel arm «(10) are axially adjustable, on each of which a radiant heat body (7) so is jammed that it reaches over the cutting edge (6) of a employed upper knife (5) over part of its circumference, 2. Messsranordnung according to claim 1, characterized in that that the radiant heater (7) is a resistance element " ment (3) and surrounded by a reflector (9) 1st. 3. Knife arrangement according to claim 1, characterized in that the radiant heater is an induction coil. 4. Sea arrangement na * one or more of the preceding Claims, characterized in that the radiant heater (7) at the connector end with clamping screws (11) or (15) pivotable and (13) longitudinally displaceable on his Swivel arm (10) is fixed.