DE1264237B - Knife roller - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B 26d

German class: 55 e- 5/09

Number: 1264237

File number: P 36590 VII b / 55 e

Filing date: April 22, 1965

Open date: March 21, 1968

Knife rollers are known with a longitudinal slot running parallel to their axis of rotation, a holder arranged in this longitudinal slot for the knife edge and in the plane of the Knife edge and transversely acting screws for fastening the knife edge (German Auslegeschrift 1074 392).

A construction is known from US Pat. No. 2,478,820, which has been used in for over 15 years Cloth folding devices are used. The folded ribbons, generally made of paper, used to The production of the cloths are used by the interaction of two rollers in the transverse direction severed. One of these rollers is usually a larger roller around which the belt is partially is wound and in its surface a knife extending in the longitudinal direction which is commonly referred to as an "anvil knife". The other roller carries one at an angle set cutting edge, which is also known as a »flight knife«.

The invention is based on the knowledge that the flight knife is arranged along a real helix must be when an undesirable interference between the flight knife and the anvil knife should be avoided. In the known knife arrangement angled to the knife shaft axis undesired disturbances result, which led to a limitation of the working speed. Until now Therefore this cutting device was limited to speeds below about 130 to 170 m / min, while in accordance with the present invention the same machine can achieve continuous operating speeds in excess of about 300 m / min can. The main object of the invention is therefore to create an especially for a flight knife assembly suitable machine with which this advantageous speed can be achieved.

This object is achieved in that the slot has a cylindrical extension at each end for a guide piece which is rotatably arranged in this and has a slot for the ends of the knife holder has and that additional screws are provided for fixing the guide piece.

Preferably the slot terminates in a narrower slot for the ends of the cutting edge.

The holder expediently has an upwardly U-shaped cross section, the upper surface of the foot part is inclined to the bottom surface of the foot part and the ends of the bottom part with the Screws are fitted with transverse slots. These slots make by clamping action Knife roller

Applicant:

Paper Converting Machine Company, Inc.,

Green Bay, Wis. (V. St. A.)

Representative:

Dipl.-Ing. RH Bahr, Dipl.-Phys. E. Betzier
and Dipl.-Ing. W. Herrmann-Trentepohl,
Patent Attorneys, 4690 Herne, Freiligrathstr. 19th

Named as inventor:
Ernst Daniel Nystrand,
Green Bay, Wis. (V. St. A.)

Claimed priority:

V. St. v. America July 2, 1964 (379 947)

an attachment of the holder in the second cutting edge within the guide pieces is possible.

The invention will now be explained in more detail with reference to the drawings, in which shows
F i g. 1 the device according to the invention,

F i g. FIG. 2 is an enlarged partial sectional view taken along line 2-2 of FIG. 1,

F i g. 3 shows an enlarged partial section along the line 3-3 in FIG. 1,

4 shows the flight knife in an arrangement corresponding to an approximately real helix,

Fig. 5 is a perspective view of one of the guide piece,

F i g. 6 shows a plan view of the flight knife roller with the flight knife arrangement as previously in FIG Fig. 4 reproduced,

7 shows a section along the line 8-8 in FIG. 6,

8 shows a perspective illustration partly broken off and partly shown in dashed lines of the knife holder.

With 10 in Fig. 3 is the anvil knife, 11 denotes the more flexible flight knife.

In Fig. 1, reference numerals 12 and 13 denote side frames of a cutting machine high-speed belts. The side frames 12 rotatably support an anvil roller 14 for this purpose

809 519/367

3 4

and a flight knife roller 15. The anvil roller 14 and a clamping piece 29, which is only shown in FIGS. 3 and 6 is driven by a gear 16, is indicated. Both are in the reproduced which meshes with a spur gear 17, which is 1.5 to 1.6 mm thick as part of the embodiment. So that the flight knife roller 15 is provided. The tooth - the cutting edge of the flying knife 11 in the wheels 16 and 17 are arranged from a not shown center of the holder 24,
Neten motor driven off. ^; The anvil roller 14 The slot 28 is in the reproduced Ausist a double roller with two anvil cutting guide form 16.8 mm deep and the upper surface at 10 a and 10 b. ^. ,. runs parallel to the upper surfaces of the

The gears 16 'and 17 are usually so con-upright parts 25 and 26, these par-

Structured that their tooth numbers are like 2: 1 or 1: 1 io allelic surfaces angled to the soil surface

behavior. In any case, the flight knife 27 & the holder 24 are arranged. At either end

supporting roller, d. H. the roller 15, smaller. This is the holder, for example as with 30, 1.6 mm

Surface speed of the flight knife 11 is cut wide to avoid the jamming of

higher than the surface speed of the Am holder 24, cutter or knife 11 and filler 29

knives 10 a and 10 b. 15 support. The slope between the top

The operation of the cutting edges 10 and 11 on and the lower surfaces of the holder 24 is through the severing of a tape can be seen from the Fig.2 difference between the front and rear and 3. The cutting edge 11 runs faster than determined knife radii. Thus, the bottom surface lies the cutting edge 10, and that which is furthest away from the surface of 27 b in a plane parallel to the roller axis and roller, i.e. the one according to FIG just moderately clamped.

detected by the cutting edge 10. The further circulation In Fig. 5, reference numeral 31 denotes a brings each successive point on the guide piece, the one with an offset, to the side Cut 11 in contact with a corresponding running slot 32 with an additional out point on the cutting edge 10, so that there is a further recess at 33. A guide piece 31 striding or shearing action is achieved. This is in the cylindrical opening or recess is in general, also the operation of the front 34 (Fig. 6) at the left end of the slot 23 assembly U.S. Patent 2,478,240. In animals. An identical guide piece is 180 ° In this construction, the progressive cut is twisted in the right cylindrical recess imperfect, because the flight knife 11 is not arranged closely 30 35 in which the other end of the is approximated enough to a real helix. Knife 11 is clamped.

The tape is in its position on the surface. The guide pieces 31 sit immovably inside

the anvil roller 14 in a known manner by the Va- half of the cylindrical recesses 34 and 35

held kuum. their place and be in clamping engagement with the

For the development of the cut, the flight 35 holder 24 is pressed by screws 36 with HiMe,

knife 11 relative to the surface 20 of the flight knife which are screwed inside the roller 15

roller 15 tilted (Fig. 7). From Fig. 7 recognizes (see. Fig. 2). For this purpose the roller 15 is at

one that the left part 21 of the flight knife 11 is provided higher 37 with threaded holes. Furthermore, the

than the right part 22-, whereby the left part is the 'guide piece 31 relative to the surface of the roller

leading or first engaging end of the flight 4 ° 15 by axially extending screws 38 (cf.

knife 11 forms when severing. F i g. 7), which are threadedly engaged in

To generate the. Longitudinal bevel according to FIG. 7 of the roller 15 are mounted in channels at 39. One is the roller 15 with a longitudinal slot 23, the partial washer 38 a sits between each guide in FIGS. 2 and 3 can be seen. piece31 and the screw 38.
The slot 23 is offset from the line L , which 45 connects the intermediate parts of the holder 24 and thus the centers of the rollers 14 and 15 (cf. cutting edge 11 are suitably carried out in FIG. 2). The offset of the slot 23 arises in order to achieve a real helix. The through from Fig. 6. A holder is installed in the slot 23 by means of opposing screws, which is designated generally by 24 and at 40 and 41 (FIG. 6). For this purpose, from the perspective illustration according to 5 ° roller 15 with openings at 42 and 43 for Auf-Fig. The holder 24 has essentially five pairs of screws from the borrowed U-shaped cross-section and consists of screw units 40 and 41,
upstanding walls 25 and 26 and a die or knife 11 is clamped over the perspective drawn foot part 27. The upper lower half of its width. The surface 27 a of the .Foot part 27 is opposite the 55 cutting edge has a certain amount of deflection bottom surface 27 b of the holder and thus the roller 15 availability, is 1.5 to 1.6 mm thick, 33 mm wide and "inclined, so that the longitudinal edge is produced, the length of which is selected in such a way that it can be seen to correspond to the width of the band that is to be severed, in particular from FIG

The knife holder preferably measures when results are obtained when the cutting edge is made of

Typical embodiment of the object of the invention 60 material with a Rockwell hardness of 60 to 62

Stand 9.5 mm in thickness and about 32 cm in the made.

Height with a length corresponding to the length of the bending of the flight knife 11 over its

Cutting edge or knife 11 and consists of cold entire length used to be quite difficult. at

drawn steel in normalized condition. The arrangement according to the invention can

Distance of the upstanding parts 25 and 26 to 65 but the cylindrical guide pieces 31 on each

Formation of the slot 28 is 3.2 mm, the end of the slot 23 with the bent

Is rolled into the middle of the holder. Inner “cutter holder 24 (see FIG. 4) turn itself and

half of the slot 28, the flight knife 11 is aligned before the clamping screws 36, 40

and 41 are tightened. The two guide pieces 31 in the cylindrical recesses 34 and 35 can be made exactly similar to each other, the guide piece with the upper The end is turned down. In the embodiment shown, the guide pieces a diameter of 6.35 mm and a length of 6.35 mm. The slot 32 is 9.5 mm wide, the Length corresponds to the full length of the guide piece and the slot extends over 6.35 mm the center line. The additional recess 33 is a 1.6 mm saw cut 6.35 mm deep. Of the larger slot 32 is offset by half the distance with respect to the center line of the guide piece, which is necessary to achieve the correct helix angle.

The problems associated with the prior art arise in the construction according to the invention during clamping caused by the flight knife 11 being clamped near each end was no longer open, as the knife ends are pivoted.

Claims (3)

Patent claims: 1. Knife roller with a longitudinal slot running parallel to its axis of rotation, a in this longitudinal slot arranged holder for the knife edge and in the plane of the knife edge and transversely acting screws for fastening the knife edge, thereby characterized in that the slot (23) has a cylindrical extension (34, 35) for a rotatably arranged in this guide piece (31) with a slot (32) for the Has ends of the knife holder (24) and that additional screws (36, 40, 41) for fixing of the guide piece (31) are provided. 2. knife roller according to claim 1, characterized in that the slot (32) in one narrower slot (33) for the ends of the cutting edge (11) runs out. 3. knife roller according to claim 1, characterized in that the holder (24) one after has a U-shaped cross-section open at the top, the upper surface (27 a) of the foot part (27) to the bottom surface (27 &) of the foot part is inclined and the ends of the bottom part (27) with the Screws (36) are equipped with transverse slots (30). Considered publications:
German publication No. 1074 392. 1 sheet of drawings 309 519/367 3.68 © Bundesdruckerei Berlin