DE10061400C2 - Method and device for cutting wound materials - Google Patents

Abstract

The invention relates to the implementation of the method and the associated technical implementation when cutting materials wound on rolls of material, such as textile fabrics, synthetic leather, plastic and nonwoven materials. DOLLAR A The invention is characterized in that the material roll (2) to be cut is no longer cut in its compact, wound state, which in the known solutions requires appropriate storage and, if necessary, the rotation of the roll (2) and a corresponding knife depth It is only cut in layers and the material strip (2.1) cut out by the knife arrangement (1) according to the invention is wound up. After the material strip (2.1) has been cut out, the roller (2) is separated into two parts over the entire length of the roller conveyor. In addition, the material strip (2.1) that has been separated and possibly wound up (3) is available. DOLLAR A The cutting device carrying out this process consists in its innovative core of two spaced and preferably spread knives (5) or knife blades fastened in a knife holder (6), which resiliently rest on the material roll (2) at the selected interface under a minimum pressure. Due to the resilient effect of the knife support, any irregularities in the material rolls or the roller bearings can be compensated for. This knife holder (6) is attached to a holding device (4) ...

Description

The invention relates to the implementation of the method and the associated device for cutting wound materials (such as textile fabrics, synthetic leather, plastic and non-woven materials) in strips.

For cutting materials wound on rolls (tapes, webs) especially tape cutting machines and roll cutting machines of different Design known (DE 297 06 767 U1, DE 197 22 465 A1, DE 195 31 781 A1, DE 93 03 547 U1, DE 83 32 825 U1). Compare also DE 265 635 C and Textil Praxis International 1979, November, page 1468.

Such machines are manufactured for working widths up to approx. 3000 mm and rolls diameter up to approx. 500 mm; the cut materials range from plastic to Textile. All known machines have a complex structure with a large number, of functions that are not or only partially required for many cutting tasks are.

The separation processes used on these machines cut the driven rotating or at least rotatable material roll on the intended Interface radially across the entire diameter of the roll.

The knives used for this are in a cutting plane (perpendicular to the roller axis) working rotating circular knives (band cutting machines), saw knives with rotating the or pulling cut (roll cutting machines), cutting knife or long knife (Rollenabstechmaschinen).

There are differences depending on the variable core diameters of the material rolls cutting depths and thus knife geometries required.

Derived from this prior art, it is an object of the invention to unite Developing cutting technology with the guarantee of reliable Separation function the machine effort is significantly reduced.

The achievement of this task is in claims 1 and 3 is give. Developments of the invention are characterized in the subclaims.

The concept of the invention goes beyond the one-knife arrangement and requires the arrangement of two knives spaced in a knife holder (for parallel cuts) are arranged so that they are independent of the Cutting position of the knife arrangement along the roller axis - one in layers Cut off material strips.

The material roll to be cut is no longer wound in its compact form Condition cut, which is a suitable storage and with the known solutions if necessary, the rotation of the roll and a corresponding knife depth requires it is only cut in layers and by the knife according to the invention arrangement with two knives cut out strips of material. there is after cutting out a strip of material over the entire length of the Roller conveyor separated the roller into two parts. In addition, there is the separated one and possibly wound strips of material are available.

The cutting device carrying out this process consists of an innovative core two spaced and preferably spread apart fastened in a knife holder Knives or knife edges that are under one Mount the minimum pressure resiliently on the material roll. Due to the resilient effect of Knife rest can possibly irregularities of the material rolls or Roller storage can be compensated. This knife holder is along one the roller axis of the material roll movable holding device is arranged.

The set cutting depth of the two knives and the movement of the Holding arrangement during the cutting process ensure this in layers  Penetration of the cutter from the surface of the roll of material to Cut through the last layer surrounding the core of the material roll.

Further details, features and advantages of the invention result from the following description of an embodiment with reference to the associated drawing. Show it

Fig. 1 is a schematic representation of the prepared for cutting the material roll cutting device, wherein the knife with linear feed in the role penetrate,

Fig. 2, the analog schematic diagram of the seated on the roll of material cutting device in a radial advance of the knife,

Fig. 3 shows the top view of the representations according to FIGS. 1 and 2,

Fig. 4 shows an embodiment for a knife holder with associated knife arrangement.

The illustration of FIG. 1 shows the cutting apparatus according to the invention, consisting of knife assembly 1 and supporting device 4, just before the cutting starts, the settling of the knife assembly 1 that is, on the first layer of material roll 2. By moving parallel to the longitudinal axis of the material roll 2, the cutting device has assumed the position in which the roll 2 is to be separated by cutting out a strip 2.1 , cf. also the schematic representation according to FIG. 3.

The knife assembly penetrates to the existing double-knife 5 with linear feed into the roll 2 and with each revolution of the roll of material 2, a strip of material cut out in 2.1 of the length of each cut sheet. The material strip 2.1 is picked up in the direction of the arrow by a winding device which contains the winding roll 3 . The drive for the winding device is also the drive for the material roll 2 during the cutting process. That is, with the effort required for pulling and winding the cut material strip 2.1 onto the winding roll 3 , the raised material roll is simultaneously rotated past the knife arrangement lying thereon.

Fig. 2 shows the analog front view of the material roll 2 with the knife assembly 1 sitting on the top layer (position A). The cutting device 1 , 4 is in this case moved by means of a radial feed into the groove 13 of the material roll 2 formed by the pulling and winding up of the material strip 2.1 cut free in layers.

The position B shows the cutting device advanced into the roll 2 via this groove 13 , which has the width of the material strip 2.1 . The cut material strip 2.1 belonging to position B is also shown on the left side of the figure.

Fig. 3 shows the top view of the showings are for the basic operation sequence of Fig. 1 and 2.

The knife assembly of the cutting device 1 has already penetrated a few layers in the roll of material 2 and the cut-away on the respective rotations of the material roll 2 2.1 material strip was wound on the winding roll. 3 The cutting edges 2.2 of the material roll 2 , which are exposed in the groove created by the cutting process, are not touched by the cutting device 1 due to the outwardly spreading holding of the knives 5 .

The material roll 2 is supported, for example, on a roll stand 8 with roll transverse fixation and carries out a rotational movement determined in the same direction by the drive of the winding roll 3 .

FIG. 4 illustrates an embodiment for a knife arrangement 1 with a V-shaped knife holder 6 , which ensures the spread position of the two knives 5 .

The V-shaped milled base body of the knife receptacle 6 contains a wedge 9 for clamping the knives 5 inserted into the V-shaped recess of the base body and a back plate 10 with a thread for set screws.

A set screw 11 for the wedge 9 and a set screw 12 for each of the two knives 5 are available as set screws.

The cutting depth or penetration depth of the knives 5 is set via the set screws 12 in interaction with the sliding foot 7 .

Decisive for the cutting quality of the knife arrangement 1 , the cleanliness when the material strip 2.1 is cut free and the guidance of the cutting device without contact with respect to the cutting edges 2.2 after it has been immersed in the groove 13 of the material roll 2 is the parallel course of the outer cutting surfaces 5.1 of the knives 5 .

LIST OF REFERENCES

1

blade assembly

2

Roll of material, first roll

2.1

strips of material

2.2

cut edges

3

Winding roll, second roll

4

holder

5

knife

5.1

outer cutting surface

6

knife receiver

7

Glide

8th

gantry

9

wedge

10

backplate

11

Tensioning screw for wedge

9

12

Set screw for knives

5

13

Groove in material roll

Claims (8)

1. A method for cutting wound materials into strips, characterized in that by a knife arrangement ( 1 ) with two knives ( 5 ) on a rotatably mounted first roll ( 2 ), the material roll, resiliently in a cutting position adjustable along the roll axis with a low contact pressure, this roll ( 2 ) is cut in layers by the two knives ( 5 ) so that a material strip ( 2.1 ) is cut across the entire length of the material web wound on this roll ( 2 ) transversely to the axial direction of the roll ( 2 ) and is stripped off and the knife assembly (1) with the two knives (5) on the top-mounted respectively to be cut position of the roll of material (2) during the entire cutting operation, a radial movement of the uppermost layer of the uncut roll (2) to the core of Performs roll of material. 2. The method according to claim 1, characterized in that the material strip ( 2.1 ) is wound after completion of the cutting process with settlement from the correspondingly rotating first roll ( 2 ) on a second roll ( 3 ), the winding roll. 3. Device for carrying out the method according to claim 1 or 2, characterized in that the knife arrangement ( 1 ) with two knives ( 5 ) is arranged on a holding device ( 4 ) which can be moved along the roll axis of the material roll ( 2 ), the knife ( 5 ) are mounted in a spread arrangement with blades running outwards in a knife receptacle ( 6 ) and the cutting edge distance of the knives ( 5 ) is adjustable. 4. The device according to claim 3, characterized in that on the cutting side of the knife receptacle ( 6 ) a height-adjustable slide foot ( 7 ) is fixed, via which - depending on the material thickness of the roller conveyor - the cutting depth of the knife ( 5 ) is adjustable. 5. The device according to claim 3 or 4, characterized in that the setting of the penetration depth of the knife ( 5 ) via the adjusting screws ( 12 ) in interaction with the sliding foot ( 7 ). 6. Device according to one of claims 3 to 5, characterized in that the knives ( 5 ) are arranged on the outside or inside of the knife holder ( 6 ). 7. Device according to one of claims 3 to 6, characterized in that the angle between the diverging knives ( 5 ) is set so that the outer cutting surfaces ( 5.1 ) of the knives ( 5 ) run approximately parallel to each other. 8. Device according to one of claims 3 to 7, characterized in that the winding roller (3) is drivable for winding the material strip (2.1) on the second roller (3) and the layered cutting with the same drive, the first roller (2 ) is rotatable.