DE19746734A1 - Knife folding machine - Google Patents

Abstract

The machine has a cam disc control with control paths for lifting and tilting the folding knives (14a,14b). Cam rollers (42a,42b, 43a,43b) of a roller support (6) which is connected to a movement transfer device engage in the control paths and can be deflected to transfer the lift and tilt movement to the knives. A fold height measuring device is mounted behind the knives near the upper inlet strip. A horizontal counter pressure device can be provided for single production or a vertical counter pressure device can be provided for endless production. The material is smoothed out by a calming device provided in front of the inlet table.

Description

The invention relates to knife folding direction with cam disc control of the folding knife according to the preamble of claim 1.

Knife folding devices are known, so in German utility model G 94 12 210.5 a folder direction with two motorized folding knives described that by means of cure stored on waves venscheiben vertically movable relative to each other are. Furthermore, this folding device has one Infeed table for the material to be folded and one Back pressure path on. Here the folding knife mo toric directly or over at least two Cam discs per folding knife in backdrop or column oil guides driven. During the vertical Movement of the folding knife must be done in working direction additionally pull a folding movement to the Grab material and into the table gap of the inlet to be able to press. This folding movement will here separately via eccentric discs or by motor set. The vertical movement of the knives and their Folding movement requires synchronization of the un different drives, which is particularly the case with Aim for very high folding speeds due to the different mass inertias more disadvantageous can hardly be realized. For high  Folding speeds are the traditional linear ones Guides on folding machines due to the relative Inaccuracies and the high proportion Sliding friction is less suitable. You need to a separate lubrication system. Still disadvantageous on the folding device described here is the Be the actual pleat height of the pleated blind according to the Folding process. This has the consequence that dimensional deviations of the fold package only after leaving the heating unit can be recognized and corrected. In case of a fall height of 50 mm and a material thickness of 0.2 mm this means possibly 80 running meters of committee, multiplied by the respective material width.

In the case of multi-layer pleating (3.5 layers), 200-400 m ^{2 of} rejects can arise from incorrect settings in the case of a one meter wide machine alone.

The invention has for its object the Verti Kal movements of the folding knife and their To implement folding movement directly to make it clear to achieve higher folding speeds as well Vertical as well as folding movements in their relation to each other over the entire speed range to get constant. The object of the invention is the actual fold height directly after the folds education, d. that is, before entering the Detect and display heating unit, as well as a Offer back pressure device that the high fold speeds in continuous operation than vertical Back pressure and the start-up process of the system as ho horizontal counter pressure can take into account.

The task is solved with the features of Claim 1.  

A major advantage of the measurement according to the invention Folding device is created by using Cam disks, the control tracks for both the lifting as well as for the tilting movement of the folding knife in one Cam disc included included. This will achieved that regardless of the folding speed a constant ratio of movements to each other and the swing tendency of the machine ne lowers d. H. the lifting and tilting movement of the Cutter bar is synchronized exactly mechanically. The number of cams may be more advantageous to be minimized to one.

With the knife drive according to the invention are now Folding speeds of over 150 folds per minute reachable. This means that the Transport device for the material to be folded and after the folding process according to the high Ge speed can be adjusted.

Due to the arrangement of a Wrinkle height measuring device in the area of the upper one scroll bar of the table gap and by a high-speed back pressure device the high folding speed is taken into account carried.

In addition, a material is advantageously made calming at the inlet, so that the flat material depending on its quality and properties in tightened state are fed to the folding knives can. This ensures that winding or Ma material inaccuracies before the folding process can be compensated.  

The counter pressure device provided according to the invention tations make it possible to start a horizontal counterpressure for one-off production exercise and when transitioning to Endless manufacturing is advantageously vertical Counter pressure device can be activated.

The vorese according to the development of claim 2 hene motion transmission device, which as Parallelogram is formed, it allows before partially disadvantageously completely the disadvantageous To compensate sliding friction by rolling friction, no additional lubrication is required to operate them becomes such. By using the parallelogram is still a high parallelism of the movement of the Folding knife secured.

According to the development of claim 3, is suitable the parallelogram also for center support of the Folding knife. This causes the fold to swing open prevented at high speeds. Especially with the high working widths it will is enough for the folding knife to withstand high loads be stabilized against deflection.

According to claims 4 and 5, the movement can carrying device also as a slide or Column guide to be formed.

The interaction of the horizontal and vertical Ge gene printing device according to claims 7 to 9 guaranteed even at very high folding speeds both at the time of the start and during the endless run the application of a constant Back pressure on the leaking folded material.  

The specified Ma according to claims 10 to 14 Terial calming device is used in the Folding device to pull in surface sheet in exact, to bring flat shape so that the subsequent, folding process running at high speed Inaccuracies in the surface web position or - education is not disturbed.

The combination specified according to claim 15 as Parallelogram trained motion transmission device with a hydraulic drive or a servo motor makes this possible Solution to use in folding machines that are not a cure have control.

Other characteristics, details and advantages of the Er are based on the drawing and a Embodiment explained.

Show it

Fig. 1 is a knife pleating facing in the table gap,

Fig. 2 is an illustration of the interaction of the Par allelogramms with a cam disc,

Fig. 3 is a parallelogram to the middle support,

Fig. 4 is an illustration of the control tracks in a cam disk,

Fig. 5 a height measuring Messerfaltvorrichtung with folds and counter-pressure device,

Fig. 6 is a vertical counter-pressure device,

Fig. 7a, a horizontal counter-pressure device in the specific matic longitudinal section,

Figure 7b is a detail section. S: S of the horizontal counter-pressure device,

Fig. 7c shows a top view of the tabletop its horizontal counter-pressure device,

FIG. 8a designed as a slider guide BEWE supply transmission device in a schematic sectional representation,

Figure 8b shows the slider guide as a section. A: A,

FIG. 9a is a formed as a pillar guide motion transmitting device in a schematic sectional representation,

Figure 9b, the column guide in section A:. A,

10 shows a material calming device and

Fig. 11 is a schematic representation of the Faltvorrich device.

In Fig. 1, he inventive knife folding device is shown with a view of a table gap 7 in a schematic representation. Two side parts 4 are connected via three spacer tubes 15 , one in the upper and two in the lower area, in a vibration-proof manner. An upper folding knife 14 a and a lower folding knife 14 b are fastened in a manner known per se to egg nen upper cutter bar 5 a and lower cutter bar 5 b. Above the upper cutter bar 5 a and below the lower cutter bar 5 b, an upper coupling axis 3 a and a lower coupling axis 3 b are each stored in the side parts 4 . Two right and left of the side parts 4 on a center salmon 18 , which is connected to the side parts 4 , arranged cams 8 each contain the information for the lifting and tilting movement of the folding knives 14 a and 14 b in control tracks 17 groove-shaped.

In the control tracks 17 , the course of which can be seen schematically from the Dar position of FIG. 4, the cam roller 42 a and the tilt cam roller 43 a engage for the upper region and the cam roller 42 b and tilt cam roller 43 b for the lower loading area. Both the cam rollers 42 and the tilt cam rollers 43 are held in a roller carrier 6 a and 6 b. Via a gear motor 13 , a gear 12 , a drive shaft 11 , a toothed belt 10 and a toothed belt wheel 9 which is seated on the central axis 18 , the cam 8 is set in rotating motion ver. Here, the lower and upper lift cam rollers or tilt cam rollers 42 and 43 are forcibly deflected. This movement is transmitted via a movement transmission device to the upper and lower cutter bars 5 a and 5 b.

The movement transmission device described by way of example in FIGS. 1 and 2 consists of a guide plate 40 a or 40 b and a spacer plate 41 a or 41 b. The guide plates 40 a and 40 b are rotatably supported at points B and C and the spacer plates 41 a and 41 b at points A and D of the roller carriers 6 a and b. One over the cams 8 and the cam rollers 42 a and 42 b and tilt curves roll 43 a and 43 b on the roller carrier 6 a and 6 b transmitting force leads to a deflection of the guide plates 40 a and 40 b. Due to the rigid connection to points A and B, according to the laws of a parallelogram, the guide plates 40 a and 40 b inevitably move in a straight line over a defined area. The length of the parallel path determine the leverage ratios (A, B and D) on which the guide plates 40 a and 40 b are based. The eccentricity of the control tracks 17 deflects the guide tabs 40 a and 40 b of the parallelogram. Due to the rotary movement of the cam plates 8 , there is an upward and downward movement and an additional tilting movement every 270 °. The movements are coupling axes 3a and 3b on both sides synchronized. The control tracks 17 are worked so that, for example, the cutter bar 5 a remains in its position for the period of movement of the cutter bar 5 b. This ensures that the inter mediate an upper inlet bar 21 and a lower inlet bar 22 folds do not jump out of the table gap 7 .

An upper and lower center support 2 a and 2 b are shown in section A: A in Fig. 3. With tenabützen 2 a and 2 b are each rotatably mounted on the upper coupling axis 3 a and the lower coupling axis 3 b and on the cutter bars 5 a and 5 b. The lower and the upper center support 2 a and 2 b be made up of a central support 30 and a central holder 28 .

The center bracket 30 is on one side by means of a snug fit 29 with the upper and lower Kop pelachse 3 a and 3 b and on the other side with the middle holder 28 rotatably connected, which in turn is attached at its other end to the cutter bar 5 . Thus, the center supports 2 may be a or 2 b 5 BEWE the conditions of the cutter bar a and 5 b and follow the same by appropriate determination of the geo metric dimensions a deflection of the cutter bar 5 and 5 b prevent.

The arrangement of more than one center support 2 a or 2 b is advantageously possible.

In Fig. 5 a knife folding device according to the invention is shown in schematic longitudinal section. In the area of the upper run-in bar 21 a Fal tenhöhenmeßeinrichtung 20 is arranged. A fold package 16 is pushed through the table gap 7 formed from an upper table 24 and lower table 23 . Here, the actual fold height is shown on a display 25 via a pleat height measuring device 20 before the measured pleats reach the heating area not shown here.

In the rear area of the knife folding device according to the invention, the position of the vertical and horizontal counterpressure devices 60 and 70 is shown schematically in FIG. 5. The 5 erkenntliche in Fig. Verti cal back pressure device 60 consists essentially of printing plates 62, and a pressure cylinder 66. The horizontal counter pressure device 70 comprises a pneumatic drive 77 , a counter pressure bar 72 and a starting device 79 .

For the formation of precise folds, it is necessary that the folding blades between 14 a and 14 b and the vertical and horizontal counter-pressure device 60 and 70 resulting folded package 16 throughout the manufac turing is acted upon by a constant pressure. In the start-up mode, this pressure is generated via the horizontal counterpressure device 70 and in endless operation via the vertical counterpressure device 60 .

The horizontal Ge counterpressure device 70 required for the start-up operation is shown schematically in more detail in FIGS . 7a, 7b and 7c.

During start a abgesenk ter in the rest position and level with the table top 75 back pressure bar 76 is pneumatically lifted by means of the 80 Kurzhubzylin from the rest position and in the direction of point B to the folding blades 14 a and b method fourteenth This process movement is caused by the loading of a pneumatic drive 77 mounted centrally under the table top 75 . A carriage 81 of the pneumatic drive 77 is connected directly via a support plate 74 to the counter pressure beam 76 . The parallel vertical lifting from the rest position of possible parallel guides 73 . During the movement of the counter pressure bar 76 in the horizontal direction, two linear guides 78 ensure parallel operation. Since the travel of the counter pressure bar 76 is not sufficient to directly apply the folding knife 14 a and 14 b with pressure, a starting device 79 and a Ge counter pressure bar 72 , which must correspond to the fold height to be generated in each case, between the counter pressure bar 76 and Folding knife 14 a and 14 b placed. The starting device 79 is subjected to back pressure during the start-up process, directly on the folding knives 14 a and 14 b and is limited by in the table gap 7 from above through the upper table 24 and from below through the lower table 23 . The size of the back pressure is tuned via a pressure supply 71 with a control valve. The folds generated by the movement of the folding knives 14 a and 14 b are deposited in the table gap 7 on the counter pressure bar 72 . The force of the back pressure is overcome and the back pressure bar 76 is moved back towards the rest position by the amount of twice the material thickness. If the counter pressure bar 76 has reached the lowering point A, the vertical counterpressure on the pleated package 16 is reduced. In continuous operation, the horizontal Ge counterpressure device 70 is brought into its rest position. The counter pressure bar 76 is lowered and in turn forms a plane with the table top 75 . Thus, the pleat packet 16 which is produced in endless operation can slide over it.

The vertical Gegenruckein device 60 shown in FIG. 6 allows, by vertical flat pressing on the folding package 16 between a pressure plate 62 and the table top 75, to generate a friction force which applies the necessary counter pressure. The pressure force is generated via pneumatic pressure cylinders 66 . A pressure control valve 63 allows all pressure cylinders 66 to press evenly with a constant pressure on the pleated package 16 . The printing unit consists of the pressure cylinder guide 61 and the pressure plate 62 and is mounted on the cross member 65 slidably ver. Depending on requirements, several printing units can be mounted on the cross member 65 . The cross member 65 itself is mounted on the side parts 4 adjustable in height. The connection of the pressure cylinders 66 to one another takes place via pressure lines 64 . The pressure cylinder guide 61 enables compensating movements of the printing plates 62 without lateral loads on the printing cylinder 66 .

The pressure cylinders 66 are adjusted to the respective pleat height by adjusting the height of the cross member 65 .

Fig. 8a and 8b, 8b schematically shows a slide guide 46 as a variant of the movement transmission apparatus, and Fig slider guide 46 in section A:. A.

The cams 8 contain in their control tracks 17 the information for the lifting or tilting movement of the lower cutter bar 5 b and the upper cutter bar 5 a. By means of the upper and lower cam roller 42 a and 42 b and the upper and lower Ren tilting roller 43 a and 43 b, which are connected to the upper roller carrier and lower roller carrier 6 a and 6 b, this movement information on the Transfer slide guide 46 , which in turn transmits this movement information to the carrier axes 19 . The guided in a slider guide 26 franking 46 accepts from the upper roll support and the lower roll support 6 a and 6 b, the Bewegungsin formations and outputs it to a shifter 47 further executes a linear guided movement.

In Fig. 9a and FIG. 9b is a possible variation is also shown a motion transfer means in the form of a column guide.

The cam disc 8, which is driven via the central axis 18 and which contains the movement information for the upper and lower cutter bars 5 a and 5 b in its control tracks 17 , transmits this movement information to the column guide 34 . In the franking 26 of the side parts 4 , a sliding bush 36 is guided linearly on a column 37 . The sliding book se 36 receives, as already described, its movement information from the upper roller carrier and lower roller carrier 6 a or 6 b.

A material calming device 50 is shown by way of example in FIG. 10. A flat web 51 is guided between a pressure shaft 54 and a cover plate 52 . A hose 53 arranged under the cover plate 52 brings about an elastic pressure-adjustable adaptation of the cover plate 52 to the pressure shaft 54 . Both the hose 53 and the cover plate 52 are held on a carrier 55 . The pressure force between the pressure shaft 54 and cover plate 52 is adjusted via a pressure control valve 56 . After passing through the sheet 51 through the Materialbe calming device 50 it is achieved that the sheet 51 can be inserted substantially tension-free and in the tightened state in the folding device. This ensures that winding and / or material inaccuracies and tension can be compensated for before the folding process.

In Fig. 11 is an overview of the arrangement of the control panel 1 , the material calming device 50 , the pleat height measuring device 20 and the vertical and horizontal counter pressure devices 60 and 70 are shown mathematically.

Reference list

1

Control panel

2nd

a upper center support

2nd

b lower center support

3rd

a upper coupling axis

3rd

b lower coupling axis

4th

Side panel

5

a upper cutter bar

5

b lower cutter bar

6

a upper roller support

6

b lower roller support

7

Table gap

8th

Cam

9

Timing belt wheel

10th

Timing belt

11

drive shaft

12th

transmission

13

Gear motor

14

a top folding knife

14

b lower folding knife

15

Spacer tube

16

Fold package

17th

Control track

18th

Central axis

19th

Carrier axis

20th

Wrinkle height measuring device

21

upper inlet bar

22

lower entry list

23

Under table

24th

Upper table

25th

display

26

Franking

27

Cover strip

28

Middle bracket

29

Fit

30th

Middle beam

31

holder

32

33

34

Column guide

35

Carrier axle bearings

36

Sliding bush

37

pillar

38

Carrier plate

39

40

a upper guide plate

40

b lower guide plate

41

a upper spacer

41

b lower spacer

42

a Upper cam roller

42

b Lower cam roller

43

a upper roll of tilt curve

43

b Lower roll of tilt curve

44

45

46

Slide guide

47

Slider

48

49

50

Material calming device

51

Areal track

52

Cover plate

53

tube

54

Pressure shaft

55

carrier

56

Pressure control valve

57

58

59

60

vertical back pressure device

61

Pressure control

62

printing plate

63

Pressure control valve

64

Pressure lines

65

Cross member

66

Impression cylinder

67

Cooling tap

68

Cooling exclusion

69

70

horizontal counter pressure device

71

Pressure supply

72

Counter pressure bar

73

Parallel guidance

74

Carrier plate

75

Table top

76

Back pressure bar

77

Pneumatic actuator

78

Linear guide

79

Starting device

80

Short stroke cylinder

81

carriage

82

pneumatic cylinder

Claims (15)

1. Knife folding device with cam disc control of the folding knife, infeed table and counter pressure device, characterized in that
that a cam ( 8 ) control tracks ( 17 ) for the lifting and tilting movement of the folding knife ( 14 a and 14 b), wherein in the control tracks ( 17 ) cam rollers ( 42 , 43 ) of a roller carrier ( 6 ) with a Movement transmission device is connected to the transmission of the lifting and tilting movement on the folding knife ( 14 a, 14 b) deflectable, and / or
that a pleat height measuring device ( 20 ) is arranged behind the folding knives ( 14 a, 14 b) in the region of an upper inlet strip ( 21 ),
and / or that a horizontal Gegendruckeinrich device ( 70 ) for the start-up operation or individual production as well as a vertical counterpressure device ( 60 ) is provided for the endless production and / or that a material calming device ( 50 ) is arranged in front of the inlet table. 2. Knife folding device according to claim 1, characterized in that the movement transmission device is designed as a par allelogram, which consists of a guide plate ( 40 ) and a spacer plate ( 41 ), which are each rotatably attached to a side part 4 and on the roller carrier ( 6 ). 3. Knife folding machine according to claim 1 or 2, characterized in that further parallelograms for center support ( 2 ) are arranged. 4. knife pleating according to claim 1, characterized in that the movement transmission device as a slide guide (46) tion with the Schieberfüh (46) linearly guided slide (47) is connected to the roller carriers (6) and to the cutter bar (5) connected is. 5. Knife folding device according to claim 1 or 4, characterized in that the slide guide ( 46 ) on the side part ( 4 ) be fastened. 6. Knife folding device according to claim 1, characterized in that the movement transmission device as a lenu guide ( 30 ) with a in the column guide ( 30 ) linear slide bushing ( 31 ) is formed, which is attached to the roller carrier ( 6 ) and on the carrier axis ( 19 ) is. 7. Knife folding device according to one of claims 1 to 6, characterized in that the horizontal back pressure device ( 76 ) consists of a starting device ( 77 ) and a back pressure bar ( 72 ); which can be guided in parallel via a slide guide and which can be pressed pneumatically against the pleat package 16 8. Knife folding device according to one of claims 1 to 6, characterized in that the vertical counter-pressure device consists of pneu matically actuated pressure plates ( 60 ) which are directed to the fold package ( 16 ). 9. Knife folding device according to one of claims 1 till 8, characterized, that the horizontal back pressure device and the vertical counter pressure device one after the other are switchable.   10. Knife folding device according to one of claims 1 to 9, characterized in that the material calming device ( 50 ) is arranged in front of the inlet of the surface sheet ( 51 ) in the table gap ( 7 ). 11. Knife folding device according to one of claims 1 to 10, characterized in that the material calming device ( 50 ) has a guide surface ( 52 ) for the surface web ( 51 ) and one above the guide surface ( 52 ) arranged and with it contacting pressure shaft ( 54 ) . 12. Knife folding device according to one of claims 1 to 11, characterized in that the contact pressure between the guide surface ( 52 ) and the pressure shaft ( 54 ) is adjustable. 13. Knife folding device according to one of claims 1 to 12, characterized in that for pressure control below the guide surface ( 52 ) by means of a pressure control valve ( 56 ) re gelatable compressed air reservoir ( 53 ) is arranged. 14. Knife folding device according to one of claims 1 to 13, characterized in that the compressed air reservoir ( 53 ) is formed as a hose. 15. Knife folding machine according to one of claims 1 to 14, characterized in that the movement transmission device designed as a parallelogram, if appropriate instead of a driven cam ( 8 ), is directly connected to a hydraulic drive or a servo motor.