ES2360624T3 - STAMPING AND TROQUELING MACHINE. - Google Patents

Abstract

The machine (100) has a sheet transporting device including a separate drive. A stamping die (2) is directly moved using three hydraulic cylinders (4). The hydraulic cylinders are individually controlled, where transverse movement of the hydraulic cylinders is cam controlled. The hydraulic cylinders are provided in a lower part of the machine, where the hydraulic cylinders engage downwards at the stamping die.

Description

Stamping and stamping machine.

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The present invention relates to a machine sheet press and stamping machine according to the preamble of claim 1. A machine of this type is published in the WO99 / 28118A.

As stamping, shearing is designated with geometric cut shapes closed themselves, which can be shaped circular, oval or polygonal as well as fantasy forms of everything kind. Also the practices exercised in the subsequent processing of forms such as punch stamping, removal of corners and stamping of records belong to this field. The stamping is done against a stamping base, in part they are also shear processes (see, Druckweiterverarbeitung, Ausbildungsleitfaden für Buchbinder, Bundesverband Druck e. V., 1996, pages 351 and following).

Packaging materials of paper, cardboard, Cardboard or corrugated cardboard are mainly stamped in the format of sheet. But during the stamping process they are introduced additionally also striated lines or blind prints in The final products. This complex process makes it indispensable stamp the sheets individually. Since in the products final is about demanding packaging with respect to realizations techniques and graphics (for example, cosmetic packaging, cigarettes, pharmacy, food products, etc.), not only pose special requirements to packaging materials proper, but to achieve optimal results are stamping tools with tolerances are also necessary minimum and stamping machines that work so extraordinarily accurate and reliable.

These requirements are met in a manner optimal through flatbed stamping. In this case, the printed and stacked sheets on a loading platform are driven to the stamping machine. On the machine it is done in a individualization facility first the individualization of the sheets to be stamped, which are aligned then below in exact fit in an installation of alignment, are received by a carriage of tweezers and are positioned exactly in the stamping installation. The clamp trucks they can be moved in this case in endless chains through the machine or, instead, can be operated by means of linear drives.

The stamping installation is constituted usually by a resting table provided with a counter plate and by a mobile table up and down by means of a elevator drive perpendicular to the counter plate and that It is provided with stamping and striating tools. TO through this upward and downward movement the final products from sheets driven form synchronized between table surfaces and printed to it Time the stretch marks needed for clean folding.

In a following clipping installation you Eliminates waste mechanically through tools trimmers According to the equipment of the machine, it they can finally separate the final products stamped into a final product separation facility planned for such finish.

It is known from document DE 30 44 083 A1 a drive for a stamping and stamping machine sheets The machine described there has a fixed lower table and a mobile top table up and down for stamping of sheets of paper, cardboard and the like. Table movement upper moving up and down is done on rollers, which are arranged on two eccentric trees arranged on the table. The upper table is supported with spring force against the rollers on the eccentric shaft. Through a rotating movement of eccentric trees moves the table upper perpendicularly to the lower table. Through eccentric drive results in temporary development a essentially sinusoidal table lifting motion higher.

It is known from document DE 33 13 790 C2 another drive for a stamping and stamping machine sheets The crucible printing press presents a first crucible fixedly arranged in a machine frame and a second crucible which can be approximated towards the first one, which is adjustable in the approach direction by means of four angled levers that they articulate in this crucible. The cranked levers are support in each case through a support joint against the machine frame and are driven by means of a cam drive

In known drives, the movement of generated lift is coupled, due to a drive common, with the transport movement. In this solution is a inconvenient employment conditioned by the design of large masses in the area of the eccentric system or the lever system and the reduced flexibility in the control of lifting movement with relation to the transport movement and, therefore, the possibility of optimization of the stamping process.

An alternative solution for the application of stamping force is described in the German utility model DE-GM 76 11 968; but in this case the sheets do not They are transported. A hydraulic cylinder that is in the bottom of the machine and that is arranged in the center with regarding the stamping tool acts by means of a symmetric lever and by means of two guided bars on the table Top of a picture. In this solution they are an inconvenience Expensive design for the transmission of force and possibility reduced for the adaptation of the stamping force.

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The problem of the present invention is to create a stamping and die cutting machine, which has several mechanization stations, whose career is independent of transport route of the sheets.

This problem is solved by means of a stamping and die cutting machine sane with the claim 1.

In the embodiment according to the invention, the adjustable tools are moved by means of separate drives. This makes it possible to control Separate separate drives. Through a circuit of position regulation is then possible to control individually the lifting movement of each tool.

In a preferred embodiment, the Separate drives are hydraulic cylinders. Not to have that move the pressure connections at the same time cylinders, the piston is fixed in the moving part and in the cylinder in the frame. The adjustable tool can be moved in this case to through one or several hydraulic cylinders; in the case of several cylinders, material irregularities can be compensated or local material faults, especially when the cylinder Hydraulic can be freely positioned in the adjustable crucible and, if necessary, it is designed very differently. Also a regulation individual position and pressure can limit the time of machine equipment when changing tasks. In this case, it is possible to drive through the hydraulic cylinders or the upper table or, instead, the lower table.

More advantageously, the settings Individual tools are determined based on a global angle of the machine, which is generated, for example, through a generator of theoretical value.

For position adjustment you can employ, for example, a resistance control, in which the flow Admission to the cylinders is regulated by means of valves.

In an embodiment especially preferred, a position control is used to control the position displacement, which regulates the flow of admission to the cylinders to through an adjustment pump. Due to the omission of the valves for the regulation of the intake flow and the output flow of the pressure medium to the cylinders is thus possible to improve performance

In an alternative embodiment, dispenses with hydraulics. The lifting movement of the Adjustable tool is performed in a known way through eccentric drives or elbow lever drives. The large power flow is carried out from the drive of the press towards the eccentric trees; only a portion Small power must go through mechanical synchronization. Synchronization is carried out more advantageously through a connecting gear between the press drive and a shaft central.

In an alternative advantageous configuration, the synchronization is done through the drive motors individually regulated as servo drives. In this way, simple synchronization is possible.

Also possible are combinations of mechanically and hydraulically operated tools.

In an embodiment especially preferred, the transport device is configured for the sheet transport through mechanization stations individual as linear drive.

In the drawings forms of preferred embodiment of the stamping and stamping machine of according to the invention.

Figure 1 shows the structure of principle of a stamping and stamping machine in representation schematic

Figure 2 shows a stamping station and die-cutting with hydraulically operated adjustable crucible in schematic representation

Figure 3 shows the individual cycles of movement of several stamping and stamping stations with hydraulically operated adjustable tools on behalf schematic

Figure 4 shows a representation schematic of the control of the movement cycles individual.

Figure 5 shows a representation schematic of driven press drives mechanically.

Figure 6 shows a representation synchronization of press drives mechanically operated

Figure 7 shows a regulation circuit closed for activation of press drives mechanically operated

Figure 1 shows the structure of principle of a 100 stamping and stamping machine for stamping, trimming and deposition of paper sheets, cardboard and the like The stamping and stamping machine 100 has, for example, a printing marker 1, two stations of stamping and / or die cutting 2, 2 ', a trimmer station 3 and a projecting arm 4, which are supported and surrounded by a housing of 5 common machine.

The sheets 6 are individualized through a printing marker 1 from a stack and are led to through a feeding table 16 towards the stamping machine and 100 sheet die cutter and are grabbed by tweezers by their front edge and are conducted intermittently in the direction of transport of sheets F through different Stations 2, 2 ', 3 and 4 of the stamping and stamping machine 100. The clamps are fixed in this case on clamp bars, these are fixed in carriages of clamps 8 and these are fixed of new in a transport system 7.

Stamping and / or stamping stations 2, 2 'are constituted by a lower table 9 and an upper table 10. The lower table 9 is fixedly housed in the frame of the machine and is provided with a counter plate, not represented in detail, for stamping blades. The upper table is housed in a mobile way vertically and is provided with stamping blades and grooving blades.

The carriages of calipers 8 with the calipers transport sheet 6 from the stamping stations and the slotting stations 2, 2 'to trimmer station 3 Next, it is equipped with trimmer tools. In the trimmer station 3 the pieces of scrap of sheet 6 that is not needed with the help of trimmer tools, whereby scrap pieces 11 fall in a carriage 12 of the type of container inserted under the station.

From trimmer station 3, lavender arrives to the outgoing arm 4, where the sheet or else is just simply deposited or, instead, a separation is made at the same time in individual final products. The projecting arm 4 can also contain a loading platform 13, on which they are stacked the individual sheets in the form of a stack 14, so that after reaching a certain height of the pile, the loading platforms with stacked sheets 14 can be removed outside the area of the stamping and stamping machine 100

Figure 2 shows one of the two stations of 2, 2 'machining, for example stamping stations or die cutters, of a sheet stamping and stamping machine 100 according to the invention. The sheet 6 to be processed is transported through transport facility 7, 8 in the direction of transport of the sheet F to the station 2, 2 'processing. The processing stations have a Adjustable upper table 10 and a lower table 9 fixed in the housing. Four hydraulic cylinders 16 for the application of the force of stamping on the stamping tool are in the bottom of the machine. The hydraulic cylinders 16 are connected, on the one hand, with the upper table 10 and are housed, on the other hand, in the housing of the printing machine and sheet die cutter. The hydraulic cylinders 16 perform a stamping stroke h, through which the top table 10 is move to the lower fixed table 9.

Figure 3 shows the movement cycles Individuals from various processing stations with crucibles adjustable hydraulically operated. The upper tables 10, 10 ', 10 '' are driven in each case by one or several cylinders hydraulic 16 (in the embodiment example two are shown cylinders, respectively). To not move at the same time the pressure connections in the cylinders, the piston is fixed in the moving part (here on the top table 10, 10 ', 10' '), the cylinder It is fixed on the machine frame. The top tables 10, 10 ', 10' 'describe in each case a movement in the Z coordinate, so that the movements z, z ', z' 'from a table superior to other can be controlled individually, depending on the task to perform and the momentary situation in the station mechanization. The movements of the clamp trucks 8, 8 ', 8' 'are represent by means of the arrows x, x ', x' '.

In figure 4 it is represented Schematic control of individual components. From a generator of theoretical value 17, which generates the angle of global reference of the machine \ alpha_ {ref}, which reference the machine cycle and machine positions, it is generated individually a theoretical reference value:

z2_ {ref}

for the top table 10 of the station 2,

z2 'ref

for the top table 10 'from the station 2,

z2 '' ref

for the top 10 '' station table 2

and so on.

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Starting from this central value generator theoretical 17 is therefore defined a reference value "angle of the machine ", which serves for individual stations as well as for the drive system, which may be constituted, for example, by several linear drives, such as magnitude of entry for their respective regulation. About the reference value Theoretical generated are then regulated the upper tables in the position regulation circuit. The regulation of such individual hydrostatic drives are known and described, for example, in the writings on hydraulics: Murrenhoff, H .: Grundlagen der Fluidtechnik, Vol. 1: Hidraulik, 4th edition, 2005; Murrenhoff, H .: Servohydraulik, 2nd edition, 2002.

Instead of a mobile top table 10, 10 ', 10 '' a mobile lower table 9, 9 ', 9' 'can also be used. Instead of two cylinders 16 a cylinder can be used, but also more than two cylinders for the drive. 16 cylinders They can be positioned more or less freely on the top table. The cylinders can be designed of different power. The cylinders can be individually regulated in position and pressure, to react to irregularities or local faults of material. For position adjustment, a displacement control (regulation of the input flow in the cylinder through an adjustment pump) or a control of resistance (regulation of the inlet flow to the cylinder through valves).

An alternative offers the use of several mechanical and synchronized press drives with each other.

Figures 5 and 6 show in representation 2 and 2 'stamping and stamping stations schematically, respectively, mechanically actuated, in front of which other stations may be arranged respectively discretionary in the direction of arrow A or they may be arranged behind them in the direction of arrow B. The stamping and stamping stations 2 and 2 ', respectively, represented as well as possible stations placed in front of or behind, they present for each crucible 10, 10 'adjustable in each case a press drive 19, 19 ', which is constituted so known, not represented in detail, by a flying disk, coupling and connection to the gear, which moves the upper table 10, 10 'by means of eccentric trees 22, 22'. The drive of press is activated in this case, for example, by means of a reduction gear 20, 20 'by a drive motor 18, 18'. He power flow is performed in this case from the flying disk directly to the crucible. For synchronization of individual press drives is provided a gear small 26, 26 ', which does not have to transmit large powers and that connects the press drives 19, 19 ', for example, with a central tree 21 for synchronization.

Alternatively, it is also possible to provide synchronization through regulated drive motors individually as servo drives for the flying disc.

Figure 7 shows the regulation circuit for the activation of press drives. As shown clearly, both regulation of the number of revolutions as well as a position adjustment.

Through the regulation circuit according to the Figure 7, the regulation variable \ alpha_ {ex} follows the value theoretical \ alpha_ {ref}. In this case, the variable is used \ omega_ {ref} in the form of a theoretical value circuit for the Drag error prevention. \ omega_ {ref} is the first derived from the theoretical value α_ {ref} according to time.

The comparison of the values α_ {ex} and α_ {ref} is done through a subtraction member. TO through a proportional member (25) following the intensification of deviation from the \ alpha_ {diff} regulation and is added as \ omega_ {ref} to \ omega_ {ref}, this sum is subtracted \ omega_ {ex}, to generate a deviation from the regulation \ omega_ {diff}. This deviation from the \ omega_ {diff} regulation is further processed, for example, through a Pl member (23) for the prevention of remaining regulatory deviations with with respect to a theoretical value of the torque M_ {ref}. The functions transmission (27), (28) symbolize the dynamic behavior of the current regulator (motor regulator) and mechanical system to regulate The state of motion (\ alpha_ {ex} and \ omega_ {ex}) It is detected by a position sensor. The output of this sensor from position is the position value \ alpha_ {ex}. \ alpha_ {ex} is conducted as recognition value to the subtraction member (S1) for comparison with α_ {ref}. Also, in the differentiator (24) is formed the temporal derivative α_ {ref}, to be conducted as \ omega_ {ex} to the subtraction member (S2).

List of reference signs

one

Print Marker

2, 2 ', 2' '

Machining station

3

Trimmer station

4

Outgoing arm

5

Machine housing

6

Sheet

7

Transport system

8, 8 ', 8' '

Caliper Cart

9, 9 ', 9' '

Bottom table

10, 10 ', 10' '

Top table

eleven

Scrap pieces

12

Car

13

Loading platform

14

Battery

fifteen

Sheet of advance of the sheets

16, 16 ', 16' '

Hydraulic cylinder

17

Theoretical value generator

18, 18 '

Drive motor

19, 19 '

Press drive

20, 20 '

Reduction gear

twenty-one

Central tree

22, 22 '

Eccentric trees

2. 3

Proportional / integral regulator

24

Differentiator

25

Proportional Regulator

26, 26 '

Connection gear between drive press and the central tree

27

Motor regulator

28

Mechanics

29

Position sensor

100

Stamping and stamping machine sheets

TO

Arrow

B

Arrow

F

Direction of transport of the specifications

x, x ', x' '

Caliper carriage movement

z, z ', z' '

Move up the table top

\ alpha_ {ref}

Machine angle of reference

\ alpha_ {diff}

Regulation deviation

\ omega_ {ref}

Reference speed of the machine

\ omega_ {ref}

Regulation deviation

α_ {ex}

Eccentric Tree Angle

\ omega_ {ex}

Number of revolutions of the tree eccentric

S1, S2

Subtraction member

Claims (22)

1. Sheet printing and stamping machine for the processing of paper, cardboard and similar sheets with several processing stations, which have a fixed tool in the frame and an adjustable tool and with a transport device for the transport of the sheets to through the individual processing stations, characterized in that the individual tools are moved, respectively, through separate drives, so that the upward movement of the adjustable tool of each processing station is individually adjustable. 2. Stamping and die cutting machine according to claim 1, characterized in that the separate drives are hydraulic cylinders. 3. Sheet-stamping and stamping machine according to claim 1 or 2, characterized in that the pistons of the hydraulic cylinders are fixed in the adjustable tool and the cylinders are fixed in the frame. 4. Sheet press stamping and punching machine according to one of the preceding claims, characterized in that the theoretical value for the movement of the adjustable tool is determined individually based on a global angle of the machine, which is generated by a value generator theoretical. 5. Sheet press stamping and punching machine according to one of the preceding claims, characterized in that the upper table has the adjustable tool. 6. Stamping and die cutting machine according to one of the preceding claims, characterized in that the lower table has the adjustable tool. 7. Stamping and die cutting machine according to one of the preceding claims, characterized in that the adjustable tool is moved by means of at least one hydraulic cylinder. 8. Stamping and punching machine according to one of the preceding claims, characterized in that the adjustable tool is moved by means of several hydraulic cylinders. 9. Sheet-stamping and stamping machine according to claim 8, characterized in that the hydraulic cylinders can be freely positioned with respect to their point of attack on the adjustable tool. 10. Sheet-stamping and stamping machine according to claim 8, characterized in that the cylinders can be designed of different power. 11. Sheet-stamping and stamping machine according to claim 8, characterized in that the cylinders are individually regulated with respect to position and pressure. 12. Printing machine and sheet punching machine according to one of the preceding claims, characterized in that a position control uses a displacement control. 13. Sheet-stamping and stamping machine according to one of claims 1 to 10, characterized in that resistance control is used for position adjustment. 14. Stamping and punching machine according to claim 1, characterized in that the adjustable tool is actuated, respectively, by means of a fly disk drive. 15. Sheet press stamping and punching machine according to claim 14, characterized in that the power flow is coupled from the fly disk directly with the tool. 16. Sheet-stamping and stamping machine according to claim 15, characterized in that a small gear is provided for the synchronization of the different drives, which does not have to transmit large powers. 17. Sheet-stamping and stamping machine according to claim 16, characterized in that the gear is configured as a central shaft. 18. Sheet-stamping and stamping machine according to claim 15, characterized in that the synchronization is carried out through individually regulated drive motors as servo drives for the flying discs. 19. Sheet-stamping and stamping machine according to claim 1, characterized in that at least one adjustable tool is mechanically actuated. 20. Sheet-stamping and stamping machine according to claim 1, characterized in that at least one adjustable tool is hydraulically operated. 21. Sheet-stamping and stamping machine according to one of the preceding claims, characterized in that the transport device for transporting the sheets through the individual machining stations is constituted by at least one linear drive. 22. Stamping and stamping machine according to one of the preceding claims, characterized in that the processing stations comprise at least one stamping and / or stamping station.