EP1035057A2 - Sheet processing method - Google Patents

Abstract

The sheets are fed in line into the processing machine where a first cutting cylinder (21) trims off the trailing edge of each sheet. The sheets then pass a first inspection station (4) and are rotated so that the freshly cut edge leads. This provides a second trim for the new trailing edge, using a second cutting cylinder (57) followed by a second inspection station (6). The sheets are trimmed longitudinally after the first cross cut and the two streams are transported in parallel. The parallel feeds also pass a second edge trim which sets the width of the sheets.

Description

The invention relates to a method for processing Arch according to the preamble of claim 1.

DE-PS 15 11 067 describes a device for Cutting sheets from a web. In doing so, a path cut into partial webs and these partial webs will be redirected to different planes before cross cutting. A distance of the tracks in the axial direction is at this device is not formed.

DE 31 15 688 C2 shows a device for separating of benefits to be solved from a material web and Waste. The benefit is made using a knife roller cut the web of material, the course of the cut but is essentially transverse to the direction of transport.

DE-AS 10 88 798 describes a device for Separation of a web into partial webs. These partial webs are spaced from one another by means of guide surfaces and by means of a cross cutting device in sheets cut up. These sheets fall on one in piles Lay-on table.

DE-PS 1 175 695 shows a processing cylinder two gripper systems. These two gripper systems are articulated coupled and together movable or swiveling.

These two gripper systems are in the axial direction not movable relative to each other.

DE 24 17 614 B2 describes a device for Laying out products on one Web rotary printing machine. Doing so Paddlewheels placed next to each other Products transported using a product carrier.

During the transport of the products on the Product carriers grip each side edge a gripper that adjusts the Products to form a distance across Transport direction moved away from each other.

DE 91 16 439 U1 discloses a method for Processing of sheets, but not of substrates, d. H. Webs which are loaded or cut by means of cutting devices be cut and a quality control by means of CCD area scan cameras.

DE-PS 549 439 discloses a method for transportation of sheets in a sheet processing machine in which the arches into at least one longitudinal section A plurality of part-sheets lying side by side divided be, the partial sheets in the processing machine be moved away from each other in the axial direction, so that between the adjacent partial sheets Distance is formed.

The invention has for its object a method to create sheets for editing.

This object is achieved by the features of claim 1 solved.

The advantages that can be achieved with the invention exist especially in that in a

Sheet processing machine a cross cutting of the beginning and end of a sheet is done without manual intervention. Integrated inspection devices make it possible to check both the print quality itself and the cutting register in the sheet processing machine. In this way, the front and back sides of the sheet, which are printed in face and reverse printing, for example, can be checked at the same time.
The interaction of the cross-cutting devices with a chain conveyor enables simple adjustment of the cutting register, which is advantageously carried out by a position-controlled electric motor driving a cutting cylinder.
A longitudinal cutting device is assigned to a processing cylinder of the sheet processing machine, so that the sheet is cut "inline" into two or more partial sheets. These sheets can be placed on stacks which can be selected, for example, by means of the inspection device, ie sorted stacks with "good" and reject sheets are formed. This has the advantage that if the partial sheet is defective, the entire sheet is not discarded.

In addition, the side by side influence each other Partial sheet during further transport or at Processing, especially during the inspection, not.

With this sheet processing machine all sides of an arch cut and this in partial arch cut up. All cuts made and the Fine and reverse printing are made using Inspection facilities checked and on selectable Stacked.

This sheet processing machine introduces "inline" Majority of machining operations resulting in a Production increase and a reduction in manual work. In addition, the quality of the so created products increased.

The sheet processing machine is in the drawing shown and is described in more detail below.

Fig. 1

eine schematische Seitenansicht einer Bogenbearbeitungsmaschine;

Fig. 2

eine schematische Darstellung der Bearbeitungsschritte in der Bogenbearbeitungsmaschine;

Fig. 3

eine schematische Draufsicht auf Stapel eines Auslegers der Bogenbearbeitungsmaschine;

Fig. 4

eine vergrößerte, schematische Seitenansicht eines Bearbeitungszylinders der Bogenbearbeitungsmaschine nach Fig. 1;

Fig. 5

eine vergrößerte, schematische Draufsicht des Bearbeitungszylinders der Bogenbearbeitungsmaschine nach Fig. 1 und Fig. 5.

Show it

Fig. 1

a schematic side view of a sheet processing machine;

Fig. 2

a schematic representation of the processing steps in the sheet processing machine;

Fig. 3

is a schematic plan view of a stack of a boom of the sheet processing machine;

Fig. 4

an enlarged, schematic side view of a processing cylinder of the sheet processing machine of FIG. 1;

Fig. 5

3 shows an enlarged, schematic top view of the processing cylinder of the sheet processing machine according to FIGS. 1 and 5.

A sheet processing machine 1 for cross and longitudinal cutting of sheets 2 has integrated inspection devices 3, 4, 6. The sheets 2 are preferably printed sheets of paper, for example securities. This sheet processing machine 1 is constructed, for example, as follows:
A feeder 7 essentially has a first stack 8, a sheet separating device 9 and a feed table 11. This feeder 7 is followed by a system 12, which is designed, for example, as a vibration system. A first chain conveyor 13 interacts with this vibrating system 12. This chain conveyor 13 has a pair of revolving chains 14, on which axially extending chain gripper systems 16 are attached. The chains 14 are deflected by a first 17 and a second sprocket shaft 18. Between the first 17 and second sprocket shafts 18, the chains 18 run at least partially along a straight line. Viewed in the direction of transport T, the first inspection device 3 is arranged after the first sprocket shaft 17. This inspection device 3 has a suction box 19, the working surface facing the chain gripper systems 16 of which is at least partially transparent. Lighting devices (not shown) are arranged under this transparent work surface.

A first cross cutting device 21 is connected downstream of this suction box 19.
The cross cutting device 21 has a rotating cutting cylinder 22 and a fixed counter knife 24 fastened to a cross member 23. The cutting cylinder 22 is at least provided with an axially extending pit, into which a chain gripper system 16 running past can dip. A width of the pit in the circumferential direction is larger than a width required by the chain gripper system 16, so that chain gripper systems 16 and cutting cylinders 22 passing by for the cutting register adjustment can be shifted in phase relative to one another. In the present example, arms rotating on both sides are provided, between which an axially extending cross member for receiving a cutting knife 26 is arranged.
The cutting cylinder 22 has a drive that is phase-adjustable with respect to the chain conveyor 13, which in the present example is advantageously designed as a separate, position-controlled electric motor.
The counter knife 24 is arranged slightly inclined with respect to the axis of rotation of the cutting cylinder 22, ie the counter knife 24 includes an opening angle alpha with the transport direction T which is not equal to 90 °, for example 89 °. This results, for example, in an angle of inclination of the counter knife 24 to the axis of rotation of the cutting cylinder 22 of 1 °. In addition, the counter knife 24 is slightly rotated about its longitudinal axis, ie the counter knife 24 has a slight twist.

The electric drive of the cutting cylinder 22 follows the chain conveyor 13 with identical Peripheral speed, so that ultimately by swirl and superimposed transport speed an exact right-angled section of the arch 2 is formed.

The axially extending cutting knife 26 of the Cutting cylinder 22 is with respect to the axis of rotation of the Cutting cylinder 22 slightly inclined and has a twist in the longitudinal direction. The cutting knife 26 of the Cutting cylinder 22 and the counter knife 24 are adapted to each other.

Instead of the fixed counter knife 24 there is also a rotating counter cylinder possible, for example a Counter knife 24 for making a silhouette or has a counter bar. It is also possible Cutting knife 26 and counter knife 24 parallel to Axis of rotation of the cutting cylinder 22 and without swirl to execute. The cutting cylinder 22 or counter cylinder can also have a plurality of cutting knives 26.

This cross cutting device 21 is in the range of Chain conveyor 13, a second inspection device 4 downstream. This second inspection device 4 consists essentially of a sensor 27, Lighting devices 30 and a suction box 35.

At the chain conveyor 13 one closes Turning device 28. This turning device 28 consists essentially of in the present example a storage drum 29 and a turning drum 31. The storage drum 29 has "double" circumference and is therefore with two controllable, offset by 180 mutually arranged gripper systems 32 and two opposite suction systems 33 equipped. On

Distance in circumferential direction between gripper systems 32 and suction systems 33 is to a length of transporting sheet 2 adjustable. The suction systems 33 are in the circumferential direction and in the axial direction movable.

The turning drum 31 has two adjacent, controllable gripper systems 34, 36 which are arranged pivotably about their longitudinal axis.
Turning drum 31 and storage drum 29 are phase-adjustable to one another.

The turning device 28 is a cylinder 37, for. B. a Machining cylinder 37 with a cooperating Slitter 38 connected downstream. This Machining cylinder 37 has, for example, at least double the scope and four independently controllable as gripper systems 39, 41, 42, 43 trained holding systems 39, 41, 42, 43. This Holding systems 39, 41, 42, 43 can also be used as suction cups be trained. Two of these gripper systems 39, 41 and 42, 43 each lie in the axial direction a center of the machining cylinder 37 approximately Axially symmetrical in a cylinder pit next to each other and are relative to each other in the axial direction slidable. In the present example, one of the two axially adjacent gripper systems 39 or 42 arranged in the axial direction and that second gripper system 41 or 43 relative to the first Gripper system 39 or 42 z. B. by means of curve 40 and Cam rollers 45 slidable. But both can also Gripper systems 39; 41 and 42; 43 can be moved. A first pair of two designed in this way Gripper systems 39, 41 are offset by 180 ° second pair of these gripper systems 42, 43 opposite.

The one assigned to the machining cylinder 37 Longitudinal cutting device 38 with a plurality of Cutting wheels 44 is short in the sheet transport direction T. arranged after the turning drum 31. This Longitudinal cutting device 38 has in the present Example an axially extending traverse 46, on the three independently operable and axial Slidable cutting wheels 44 are arranged.

After the processing cylinder 37, a second chain conveyor 47 with two rotating chains 48 is arranged. A plurality of chain gripper systems 49 are arranged on these chains 48. These chain gripper systems 49 consist of two chain gripper systems lying side by side in the axial direction, which are arranged approximately symmetrically with respect to the center of the machine and can be actuated independently of one another. Instead of the processing cylinder 37, the chain conveyor 47 can also have chain gripper systems that can be moved relative to one another in the axial direction.
More than two gripper systems 39; 41 and 42; 43 ie any number can be moved. in the

Case of three axially side by side For example, the gripper systems in the middle arranged gripper system stationary in the axial direction and the two outer gripper systems from the middle one be pushed away.

The chains 48 are deflected by a first and a second sprocket shaft 51, 52. A center 53 formed by the first sprocket shaft 51 and the machining cylinder 37 closes an opening angle Beta less than 180 °, z. B. 155 °.
After this sprocket shaft 51, a suction box 56 is arranged in the chain conveyor 47 below the chain 48. This suction box 56 is followed by a second cross-cutting device 57, which is constructed identically to the first cross-cutting device 21. The cross-cutting devices 21, 57 serve to cut the ends 71, 72 of the sheets 2, 82, 83. This second cross-cutting device 57 is followed by the third inspection device 6 with a sensor 58, lighting devices 59 and a suction box 61.
Then there is an arm 62 in the area of the chain conveyor 47. This arm 62 has six stacks 63, 64, 66-69, two of which are in pairs next to each other and the resulting three pairs of stacks 63, 64 and 66, 67 and 68, 69 are arranged one behind the other. The stacks 63, 64 and 66, 67 arranged side by side of the first two pairs of stacks each have common lifting devices, so that one pair of stacks is raised and lowered together. In the third pair of stacks, separate lifting devices are provided for the two stacks 67, 68 lying next to one another, so that the two stacks 67, 68 can be raised and lowered independently of one another.

Among gripper systems or chain gripper systems are a plurality of grippers, one on one Longitudinal axis pivotable shaft are arranged understand.

The functioning of the sheet processing machine 1 is as follows:

A sheet 2, in particular a paper sheet printed in face and reverse printing, is fed from the first stack 8 to the feed table 11 by means of the sheet separating device 9. From this feed table 11, the sheet 2 is gripped by the vibrating system 12 and transferred to a chain gripper system 16 in the region of the first sprocket shaft 17 of the first chain conveyor 13. This chain gripper system 16 transports the sheet 2 along the "straight" part of the chain conveyor 13 to the first inspection device 3. By means of the first inspection device 3, the sheet 2 is segment-wise damaged, such as. B. cracks and holes examined. The watermark of sheet 2 is also inspected by transmitted light. The sheet 2 is guided by the suction box 19 of the first inspection device 3 which is subjected to negative pressure.
The chain gripper system 16 transports the sheet 2 through the cross-cutting device 21 to the second inspection device 4. There the sheet 2 is sucked in by the suction box 35 of the second inspection device 4 in the area 71 of the sheet 2. One end 72 of the sheet 2 is still in the cross-cutting device 21, in which a narrow, axially extending strip 73 is cut from the end 72 thereof. The transport speed of the chain conveyor 13 and the peripheral speed of the cutting knife 26 are adapted to one another, so that the end 72 of the sheet 2 is cut at right angles to the transport direction T.
This sheet 2, which has a first cut 74, is now inspected by the second inspection device 4. A front side (face side) of the sheet 2 and a new edge of the sheet 2 (cutting register) resulting from the trimmed end 72 are checked.
The chain gripper system 16 then transfers this sheet 2 with its start 71 to a gripper system of the storage drum. This storage drum 29 transports the sheet 2 in the direction of the turning drum 31. If the end 72 of this sheet now reaches the area of the suction systems 33 of the storage drum 29, these suck the trimmed end 72. Thereupon, the suction systems 33 move approximately arrow-shaped away from the center of the storage drum 29 and thus tighten the sheet 2 both in the circumferential direction and in the direction of the lateral edges of the sheet 2.
The phase shift between the turning drum 31 and the storage drum 29 is set to the length of the sheets 2 to be processed. The storage drum 29 transports the start 71 of the sheet 2 through the gap between the turning drum 31 and the storage drum 29 until the suction systems 33 reach this gap. The trimmed end 72 of the sheet 2 is gripped by the first gripper system 34 of the turning drum 31 and released by the suction system 33 by switching off the negative pressure. The two gripper systems 34, 36 of the turning drum 31 then pivot towards one another and the trimmed end 72 is transferred from the first gripper system 34 to the second gripper system 36. The gripper systems 34, 36 pivot back into their original position in their further course.

The trimmed end 72 is now gripped in advance in the transport direction T by the gripper system 36 and the untrimmed beginning 71 trailing.
The sheet 2 is transferred from the turning drum 31 to a pair of gripper systems 39, 41 or 42, 43 of the processing cylinder 37. On the processing cylinder 37, the sheet 2 is provided with three cuts 76, 77, 78 in the longitudinal direction - ie in the transport direction T. By means of the second and third cuts 76, 77, narrow strips 79, 81 are cut off from both longitudinal sides of the sheet 2.
Gripper division of the gripper systems 39, 41, 42, 43 of the processing cylinder 37 and the width and position of the sheet 2 are matched to one another such that the two cut strips 79, 81 are not gripped by grippers.

The fourth cut 78 separates the sheet 2 in the middle into two partial sheets 82, 83. Again, there is no gripper in the area of the cut 78.
If these three longitudinal cuts 76, 77, 78 are complete, even with the maximum length of the sheet 2, the two partial sheets 82, 83 are moved apart in the axial direction. For this purpose, in the present example, a gripper system 41 or 43 or 39 or 42 executes a stroke in the axial direction by means of a cam roller which interacts with a cam disk.
Only after the two partial sheets 82, 83 have been moved away from one another are these two partial sheets 82, 83 transferred in the region of the first sprocket shaft 51 to a chain gripper system 49 of the second chain conveyor 47. The gripper system 41 or 43 of the processing cylinder 37 is moved back into its starting position before the next whole sheet 2 is taken over.
The spaced partial sheets 82, 83 are transported further in a common transport direction or plane.
From this chain gripper system 49, the two partial sheets 82, 83 are fed to the second cross-cutting device 57. To calm the sheet 2, it is sucked in along the suction box 56 upstream of the cross-cutting device 57 and the end 72 of the partial sheets 82, 83 located in the chain gripper system 49 is already guided over the suction box 61 of the third inspection device 6. The trailing start 71 of the sheet 2, ie the two pulled-apart partial sheets 82, 83, is cut off by means of a fifth cut 84 in the axial direction at right angles to the transport direction T, a strip 86. The sheet 2 is now trimmed on all sides and separated into two partial sheets 82, 83.
A back side (reverse side) of the sheet 2, ie the back sides of the two partial sheets 82, 83, together with the trimmed edges in the longitudinal direction and the trailing start 71 of the sheet 2, ie the trailing, axially trimmed ends of the partial sheets 82, 83 by means of the inspection device 6 controls.

The inspection devices 4, 6 control this Cutting register of sheets 2; 82; 83, d. H. the location at least one trimmed edge, preferably all trimmed edges of sheet 2; 82; 83 regarding one Reference marking, for example within a Printed image. Preferably the entire sheet including the entire printed image.

Transported by the inspection device 6 Chain conveyor 47 which is trimmed on all sides and on Front and back checked partial sheets 82, 83 too the six stacks 63, 64, 66-69 of the boom 62. There, the partial sheets 82, 83 can optionally on one of the six stacks 63, 64, 66-69 are placed. Here preferably take the first four stacks 63, 64, 66, 67 so-called "good" sheets and the last two juxtaposed stacks 67, 68 reject sheets on.

Instead of sheets 2, 82, 83 it is also possible, for example, to cut or cut printed webs, ie printing materials, and then to check them using one or more inspection devices 3, 4, 6. The cutting devices 1, 38, 57 can then be arranged, for example, in the region of a folder of a web-fed rotary printing press.
There, a web is cut into several partial webs in the longitudinal direction, for example, and then cut into signatures in the transverse direction. The cutting register can be checked after each cut or after the web has been completely cut in signatures.

The inspection devices 3, 4, 6 include preferably one or more CCD area cameras that inspect the sheets as a whole.

Reference list

1

Sheet processing machine

2nd

arc

3rd

Inspection facility, first

4th

Inspection device, second

5

-

6

Inspection facility, third

7

Investors

8th

Stack (7)

9

Sheet separation device (7)

10th

-

11

Feed table

12th

investment

13

Chain conveyor

14

Chain

15

-

16

Chain gripper system

17th

Sprocket shaft, first (16)

18th

Sprocket shaft, second (16)

19th

Suction box (3)

20th

-

21

Cross cutting device

22

Cutting cylinder (21)

23

Traverse (21)

24th

Counter knife (21)

25th

-

26

Cutting knife (22)

27

Sensor (4)

28

Turning device

29

Storage drum (28)

30th

-

31

Turning drum

32

Gripper system (29)

33

Suction system (29)

34

Gripper system, first (31)

35

Suction box (4)

36

Grapple system, second (31)

37

Machining cylinder

38

Rip cutter

39

Gripper system (37)

40

Curve

41

Gripper system (37)

42

Gripper system (37)

43

Gripper system (37)

44

Cutting wheel (38)

45

Cam roller

46

Traverse (38)

47

Chain conveyor

48

Chains (47)

49

Chain gripper system (47)

50

-

51

Sprocket shaft, first (47)

52

Sprocket shaft, second (47)

53

Head Office (37; 51)

54

Head Office (37; 44)

55

-

56

Suction box

57

Cross cutting device

58

Sensor (6)

59

Lighting device (6)

60

-

61

Suction box (6)

62

boom

63

Stack, first (62)

64

Second stack (62)

65

-

66

Stack, third (62)

67

Stack, fourth (62)

68

Fifth stack (62)

69

Sixth stack (62)

70

-

71

Beginning (2)

72

End (2)

73

Stripes

74

Cut, first

75

-

76

Cut, second

77

Cut, third

78

Cut, fifth

79

Stripes

81

Stripes

82

Partial sheet (2)

83

Partial sheet (2)

84

Cut, fifth

85

-

86

Stripes

T

Direction of transport

alpha

Opening angle (53; 54)

Claims (1)

Process for processing printing material (2; 82; 83) whereby the printing material (2; 82; 83) first by means of Cutting devices (21; 38; 57) cut or cut is characterized in that a Cutting register of the printing material (2; 82; 83) by means of an inspection device (3; 4; 6) controls becomes.

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