DE3416614A1 - EMBOSSING AND CUTTING MACHINE FOR STRIPED MATERIAL - Google Patents

Description

APPLICANT

MANUEL TORRES MARTINEZ Sancho el Fuerte, 21 Pamplona SPAIN

OBJECT

Embossing and cutting machine for strip-shaped material

PRIORITY

May 6, 1983 No. 522 170 SPAIN

341661 A

Preparation and cutting machine for strip-shaped material

The invention relates to an embossing and cutting machine for strip-shaped material in the preamble of claim 1 specified type.

The final operations in handling cardboard or similar material to make packaging or the like consist in cutting off a one-piece element that forms the packaging, and the formation of a number of embossed lines or areas of reduced thickness in the surface of the Materials that act like hinges and allow the different levels of the packaging to be stored, to form a packaging element with a given volume and given dimensions.

The cutting of the cardboard starting strip and the manufacture the mentioned embossing lines for folding takes place in an embossing and cutting machine, the opposite one has cutting disks arranged on parallel axes which come into contact with one another on their circumference and act in the manner of rotating scissors, which the cardboard strips or the like into elements with smaller Dimensions divided. Furthermore, the machine has a number of embossing disks, which are conjugated on the circumference Have profile in the manner of a tongue and groove. These discs act simultaneously on the upper and

. lower part of the strip and create a zone of reduced thickness, along which the packaging is later folded with high accuracy.

Based on this basic construction, a continuous embossing process on a cardboard strip or the like at the same time allows cutting, so that from a strip with considerable Width can be cut out for 'several packaging parts at the same time Variety of machines designed for this purpose.

In a practical implementation of such machines, cutting disks are on rigid parallel axes as well Arranged embossing disks in any axial position with the help of any blocking devices are set, which usually allow the wedging of a disc, a roller or the like on an axis. These known devices generally require manual actuation for positioning and subsequent definition of the cutting and embossing disks. Because this process of defining or positioning the width of the cut part as well as the position of the various slices with high precision determined by the marking lines, this positioning of the discs is a costly and difficult manual operation, on which the quality of production depends. This process continues to require a significant amount of time which the machine must be put out of operation.

In practice, with few exceptions, the print runs on the packaging are very small, which means that they are changed frequently

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the positions of the various disks, which requires the downtimes of the machine can be increased considerably and become uneconomical the machine results. This is due to the low flexibility of the basic construction of such machines, which are intended for very large editions and thus lengthy and complicated processes when moving from one format to require another for packaging.

In addition to the low adaptability, the construction of the known machines, in which the Axis carrying cutting and embossing disks extends from one side of the machine to the other, further disadvantages on:

- Alternating and combined bending and torsional loads arise in the axes or shafts, whereby these stresses are concentrated at individual points at which the panes are fastened, so that in many cases it is necessary that the axles or shafts are oversized, resulting in complex, space-consuming machines that are costly to construct and accessories are;

- The manual alignment and arrangement of the discs results in a low level of accuracy, so that there is also a Production with insufficient precision results in increased and uneven wear certain parts of the machine that are essential, such as the cutting discs.

These disadvantages result in connection with the large amount of space required the machine and its high energy consumption mean that such machines are unreliable and precise are, whereby the production of packaging and the like is very expensive.

The invention is based on the object of creating an embossing and cutting machine of the type mentioned above, which allows for a very quick change from one packaging format to another with little space requirement Enables downtimes.

This object is achieved by the features specified in the characterizing part of claim 1.

Advantageous refinements and developments of the invention emerge from the subclaims.

The machine according to the invention has a frame in which at least one pair of cutting knives supporting Blocks and a pair of blocks carrying dies are arranged. The pairs of blocks are opposite each other arranged at upper and lower positions and have a central axis about which they tilt can. Drive shafts, which transmit the drive movement to the cutting or embossing disks, are arranged on both sides of this central axis and parallel to it. When a block is tilted or pivoted about the central axis, one of the axes becomes the corresponding one Disks brought into a working position, while the other axis is brought into a rest position in which a corresponding positioning of the disks take place

can, so that the change in the distances between the cutting and embossing disks to change the format of the Packaging can be done without wasting time by simply tilting the blocks in the opposite direction can.

Each block stores and holds the corresponding cutting or embossing disks with the help of a pair of parallel plates that hold the roller bearings for a disc arranged between them. Through each group of this parallel arrangements runs the drive shaft, which provides the rotation to all pulleys of this part of the Block transfers. These cutting or embossing units do not have a rigid connection to the block, but are attached to parallel rods that are parallel run to the drive shaft, the attachment is made with the help of sliding pads that change the enable axial position and always maintain exact parallelism between the various washers, which are non-rotatably connected to the corresponding drive shaft.

The central axis around which each block swings or tilts is formed by a threaded spindle, which with the help of their rotation in one direction or the other causes axial displacement of devices, the rods wear under the action of a pressurized fluid are extendable. These rods can be projected with a neck or an extension of the units carrying the disks come into engagement such that they are in one direction or the other axially shifted when in a

• a

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Rest position, whereby the exact distance is set for the production of a certain type of packaging can be.

Each cutting or embossing unit has a locking device in the manner of a locking lever between the side plates on, which is hinged in its central part and which operates a spring via one end, which is in the Meaning of a release of its other end acts on which a brake shoe is located. With the help of this brake shoe the cutting or embossing unit can be in its final axial position by the action of a pneumatic chamber be set that the brake pad made of elastomeric material against a toothed track presses.

Due to the design of the machine according to the invention, the cutting and embossing axes are mounted on shafts, which transmit the rotary motion to the disks, while the cutting and embossing disks themselves are independent of this Drive shaft are mounted so that it is only subjected to torsion. This will make everyone else Eliminates forces that affect the accuracy and precision of the machine. The drive shaft only has in the form of a splined shaft on which the discs can be displaced in the axial direction.

The machine according to the invention has, inter alia, the the following advantages:

- The cutting and embossing disks are combined in blocks arranged in pairs, the above

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and underneath the cardboard strip or similar material are arranged. The blocks can be pivoted about a central axis in such a way that a group of cutting and embossing units is in the operating position, while another group is in a rest position is arranged in which the individual disks to predetermined axial distances for a other production can be discontinued;

the individual disks are held and stored independently of one another on parallel plates, the one Form a cutting or embossing unit that rests on the blocks $

the entire series of cutting and embossing units arranged parallel to one another is attached to their disks traversed by a splined shaft which only transmits rotary motion to the discs;

each cutting and embossing unit can be moved in the axial direction by the action of some rods, which are engaged for a given time and move with the threaded spindle located in the center move, which forms the axis about which the block can be pivoted;

each cutting and embossing unit has a locking part by which it is clearly set in the correct axial position;

the drive shafts, which are driven simultaneously with the help of a lateral chain and pinion drive, can be decoupled from the rotary movement,

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thereby reducing the energy consumption and the wear and tear of those disks that are not in the Operating position are located;

- the cutting disks, which in pairs cause the strip of material to be cut when they come into contact with one another, have a slight axial displaceability in at least one of the blocks and in each cutting unit, which is controlled by the action of a membrane to which a fluid pressure is applied and other elastic devices counteracts. In this way, the knives that are not in use can be separated from each other, so that there is no wear, and it is still possible to control the contact pressure between the knives, if these are in operation.

The advantages and properties of the machine according to the invention described above enable a controlled Operation and exact positioning of the individual independent elements of the machine with an automatic central control with the help of a numerical control device or the like, so that a previously results in unachievable flexibility. The machine according to the invention can operate continuously work without stopping even with very small production series, which are therefore very much reduced Costs can be produced, their price being comparable to very large production runs.

Furthermore, the machine has a significantly improved precision and reliability, although its

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Drive shafts can be made much lighter, and due to the reduced mass there is a rapid response to the movement processes, so that overall a more economical operation results.

The invention is explained in more detail below with reference to the drawings.

In the drawing show:

Fig. 1 is a cross-sectional view of an embodiment the embossing and cutting machine,

Fig. 2 is an enlarged partial view of FIG. 1, the attachment of an embossing disk in the corresponding Block shows

Fig. 3 is a partial sectional view of the embodiment the embossing and cutting machine from which the various axes of a block are stored on the side parts of the frame of the machine and the construction of the facilities which transfer the driving forces to these axes,

Fig. M- a partial sectional view of a pair of the cutting parts in the operating position,

5 shows a partial sectional view of a pair of the cutting parts in a rest position,

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Figure 6 is a sectional view of a pair of the embossing members in the operating position,

Figure 7 is a schematic view of one side of the machine with the kinematic chain, which drives the spindle shafts,

8 is a schematic profile view showing various Positions of a number of disks along their respective drive axes shows,

Figure 9 is a schematic view of the other side of the machine with the kinematic chain that drives the drive axles.

In the drawings, an embodiment of an embossing and cutting machine shown, which is used, for example, for the production of packaging. Essentially points this machine above and below a cardboard strip running through it, disc-shaped cutting and Embossing elements, which are arranged as desired and which are an unwound element in the cardboard strip Form specified packaging, which is already separated and provided with embossed lines on which the folding edges the packaging.

The embodiment of the machine has a frame 1 which has essentially two vertical parallel surfaces, between which, according to FIG. 1, a number of Blocks 2 is arranged, which is supported by a support axis 3

are supported around which the blocks can tilt.

Vie this from Pig. 1 can be seen, everyone wears these Blocks 2 both a number of cutting disks 5 as also a number of embossing disks 6. The former are formed by a sharp cutting knife that is opposed to the upper one with an identical cutting knife or lower block cooperates to burn the strip of cardboard running through the machine, while · on the other hand, the embossing disks 6 have a conjugate profile on their periphery, which when acted upon on the cardboard strip this is permanently deformed, so that an area with a reduced thickness is created, on which the box is subsequently folded to form the corresponding packaging.

Each block 2 carries two drive axles 4-, which are to each other and are parallel to the support axis 3 and with the help of which the rotation of one or the other group of disks is caused carried by each block 2. The possibility of tilting the blocks · 2 about their axis 3 With the aid of a linear actuator, as can be seen from FIG. 1, each pair of blocks 2 has a number of disks which act on the cardboard strip, while the other group of disks is in a rest position in which it can be prepared so that it is at different distances between the different discs to effect, can be brought to cutting and embossing for to carry out a different type of packaging without the continuous process of cutting and embossing before its termination is disturbed.

An essential feature of this embodiment of the machine consists in that the cutting disks 5 and the embossing disks 6 are mounted directly on each block 2, however, each disk group of the pair, which is located on this block 2, with the drive axle 4 in connection stands, which is formed by a grooved element and the axial displacement of all on it Allows discs so that they reach their correct position, the drive axle 4- then in a new way Way transmits a torque that is required for the rotation of the corresponding disk group.

The mounting of each disk, both the cutting disks and the embossing disks 6, on the corresponding one Block 2 takes place in a completely independent way because each disc is held between two side plates 7, the one opening for the passage of the drive axle 4- and have suitable distances for the support bearings of this disc. Each cutting disk 5 and each embossing disk 6 forms with its side plates 7 a one-piece unit according to FIG. 2, which in turn has two open sliding bearings 8 is supported, which encompass two parallel sliding guide rods that are firmly connected to the block 2. on In this way, the unit or assembly for both the embossing disks and the cutting disks can be in Shift the axial direction in order to follow the desired cutting width of the strip and the Determine the position of the various embossing lines.

Under one of the sliding guide rods 9, a chamber made of elastic material is arranged, which with compressed air is filled and which acts in the manner of a buffer 10 that

picks up slight differences in terms of parallelism this sliding guide rods 9 can be present.

So that each of the described cutting or embossing units works properly, it is necessary that it in the manner shown in FIGS. 4 to 6 with respect to their position with respect to their counterpart in the opposite block 2 are precisely defined can, whereby it is imperative that this position is clearly determined without any possibility there is an axial displacement during operation of the disks. On the other hand it must be possible to move these discs when they are in their rest position and it is desired to their position change. This is achieved in a simple manner by the action of a locking lever 11, which is in each cutting or Embossing unit is provided and is formed by a one-piece element which at its central part between is hinged to the respective side panels 7 of this unit.

As can be seen from Fig. 2, one end of the locking lever 11 actuates a release spring 12, which in.einer Blind bore of a removable part or extension 16 is arranged, which is defined between the side plates 7 is. This spring 12 causes the pressing of a rolling element 13 against a path, which in turn against a Buffer 19 is supported.

The rolling element 13 has at a point that the opposite rolling support causing ball, a

Elastomer disc 14, which is pressed against the internal teeth of a plate 15 and acts as a brake shoe, the plate 15 being one of the slide guide rods 9 carries on.

When the discs are in their operative position, the blocking pad 19 is filled with pressurized fluid filled, which causes a movement of the locking lever 11 about its axis, whereby the release spring 12 exerted force is overcome and the rolling element and thus the elastomer disk 14 against the toothed Plate 15 is pressed. In this way it is achieved that the actuated disk unit is properly fixed in its axial position.

If it is necessary to change this position, it is sufficient to use the ones in the blocking pad 19 Reduce pressure so that the release spring 12 is effective ■ and the braking effect is eliminated, reducing the axial movement the cutting and embossing units on the sliding guide rods 9 becomes possible.

As can be seen from FIGS. 4, 5 and 6, increases the locking lever 11 between the side plates 7 of the embossing units and the cutting units a predetermined posi tion in such a way that it meets the above requirements, d. H. when this locking lever 11 is in its position is set, the axial positions of each unit along the drive axis 4 are set. Like this from the upper part of FIGS. 4 and 5 can be seen, on the other hand the cutting units arranged in the upper block 2 have a certain play in the axial direction

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between the locking bar 11 and the side plates 7 which hold these upper cutting disks.

• As can also be seen from FIG. 1, the Locking lever 11 in the upper cutting block 2 has a slightly different shape, which has an inlet for a pressure flow medium and a shallow cylindrical chamber 22 which suitably includes a membrane 23 elastic material and with a circular shape. As can be seen from a renewed consideration of Fig. 4- and 5 can be seen, an element is connected to the locking lever 11, which receives a spring 24 in a blind hole, which has the effect that the unit formed from the side plates 7 and the cutting disk 5 according to FIG. assumes a position with a slight axial displacement, which is sufficient so that the cutting disks do not come together come into contact, so that a defusing results when these disks 5 are not with the cardboard strip are engaged.

If, on the other hand, it is desired that a pair of cutting disks 5 is effective, it is only as shown in FIG. required to supply pressure to the chamber 22, whereby the diaphragm 23 is deformed and the spring force of the spring 24- overcomes, which leads to an axial displacement of the upper disk, which is connected to the lower cutting disk 5 in Is brought into contact.

This solution is also made possible by adjusting the pressure of the flow medium that is in the chamber 22 ! is effective to set the force with which the two cutting disks 5 come into contact, so that with one

minimal wear and tear sufficient pressure when cutting of the cardboard strip is achieved.

From the above description it can be seen that the various embossing and cutting units are independent Elements are blocked in the desired axial position and freely displaced within each block 2 when in a rest position, to fit them to the dimensions of any production adapt. As will be explained below, this shift takes place in a completely automatic manner Way that can also be controlled by numerical controls, so that the cutting disks 5 and the embossing disks 6 can be adjusted to desired with a previously unattainable speed and accuracy Manufacture cardboard packaging.

From Fig. 2 it can be seen that a threaded spindle 20 is arranged in the middle of each block 2, which forms part of the support and tilt axis 3 of the block 2. On each threaded spindle 20 are one or more in the center arranged carriages 17 are screwed, which slide through the central part of the block 2 without rotation, so that it is possible that the rotation of the threaded spindle 20 is an axial displacement of this Carriage 17 in one direction or the other, however always causes in the axial direction. In its part guided through the block-2, the carriage 17 has several Rods 18, normally withdrawn by the action of a coaxial spring, before a pressurized fluid is fed, and then with respect to a projection 16 or a protruding element

are extended, which is formed according to FIG. 2 on each cutting or embossing unit.

The rotation of the threaded spindle 20, which is suitably surrounded by a protective device 21, which it protects against the ingress of dust and foreign bodies that can impair their precision, it enables in Connection to the projecting position of a rod 18, along a desired cutting or embossing device of each block in a completely automatic manner and with a great precision and operating speed to move, with successive forwards and backwards movements of the carriage 17, which is arranged in the middle with protruding or non-protruding rod 18 allow any positioning in a minimum of time carry out a group of cutting disks 5 or 6 embossing disks on the drive axis 4-, wherein it is possible to move the entire group of discs together and each unit in the correct position to let stand.

Each splined drive shaft 4 is shown in FIG Fig. 8 has a sufficient length dimension so that it is possible, at one of its ends, all of the cutting or Arrange embossing units that are at a given dimension the packaging from the cardboard strip do not have to carry out any surface treatment.

From FIG. 3 it can be seen how these drive shafts 4 are fastened to each block 2. It is ^ER: know that the drive shaft 4 · or rather its extension inside a gearbox two

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Has plates 29, one of which, the outermost, can rotate freely with respect to this drive shaft 4, while the other is connected to her. Between these plates 29 is a loose gear 28 with a in the middle arranged recess in which the entire unit is supported by clutch disks from bronze or the like.

The freewheeling gears 28 of each drive shaft 4 mesh with a pinion 27 which is connected to an outer ring gear 26 by the holding and tilting axis 3. As can be seen from FIG. 9, the ring gears 26 of the upper ones are in each cutting or embossing block 2 and lower support and tilt axes 3 in engagement with one another. Here are the ring gears 26 with the help of a Chain or belt transmission or the like between the cutting and embossing blocks and with an electric motor connected that drives the entire unit. The rotation of this motor via the transmission described and in the directions of rotation shown in FIG. 9 continuously set the free-running gears 28 in rotation, these Rotation is only transmitted to the corresponding drive shaft 4 when pressure is applied to a piston 31 acts, which is in communication with an inlet 32 and with a corresponding line, this being Pressure acts on one of the plates 29, whereby the entire group of the plates 29, the clutch disks and the idle gear 28 is connected to one another and the corresponding drive shaft 4 in rotation is moved.

As can be seen from Fig. 3, the

Threaded spindle 20 has a central position coaxially to the support and tilt axes 3 and is with one of these Connected axes on which the block 2 is attached via appropriate rolling bearings that tilt as well as a allow free rotation of each support and tilt axis 3. The threaded spindle 20 and the associated support and Tilting axis 3 form a unit on which a ring gear 25 can be attached outside of frame 1.

As can be seen from Fig. 7 , the ring gear 25 is in engagement with its counterpart in the upper block and a chain or other transmission is formed between the cutting blocks and the embossing blocks, with a further transmission between one of the threaded spindles 20 and one underlying electric motor is provided, which sets all threaded spindles 20 in rotation, with the result that this, in combination with the rods 18, enables perfect positioning of each cutting or embossing unit, always in a simultaneous manner between the threaded spindles of the same block.

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Claims (1)

34166H Patent attorneys : "::". '.' . : "::. *!" Di * p; lUlng. Curt Wallach European patent agent; · * '""''''" ^l CTHtflVilng. Günther Koch European patent attorneys Dipl.-Phys. Dr.Tino Haibach Dipl.-Ing. Rainer Feldkamp D-8000 Munich 2 · Kaufingerstraße 8 · Telephone (0 89) 2 60 80 78 ■ Telex 5 29 513 wakai d Date: Our sign; I7 913 F / Nu Embossing and cutting machine for strip-shaped material Patent claims: 1. Embossing and cutting machine for strips Material of cardboard or the like, with pairs of upper and lower cutting or embossing disks for the strip-shaped material, thereby characterized in that the machine has a frame (1) with a number of equal Block pairs (2) has that each of these blocks (2) has two drive shafts (4-) which are parallel . run to a central axis (1) around which each block (2) occurs simultaneously with the tilting of the other Block of the pair can tilt that by this tilting the drive shafts supporting the disks (5 »6) the upper and lower blocks of each pair are moved towards and away from each other, at least one pair of drive shafts remaining in the active cutting or embossing position, while at least one other pair remains in a position of rest in which a change in distance can take place between the levels of action of each disc, so that there is a separation in each block of the functions is achieved in which the drive shafts (4 ·) exclusively precision functions such as For example, meet the drive and the leadership when changing the working level, while the other functions such as holding each disc (5, 6) in its working plane with the help of setting and holding devices (11 to 19) fulfilled by the construction of the block (2) itself which is connected to the frame (1) of the machine, but can tilt in relation to it. 2. Machine according to claim 1, characterized that each drive shaft carrying the disks (5, 6) is wedged in a rotationally fixed manner with the disks in the radial direction and a displacement of the discs along the drive shaft (4-) allows each disc (5 »6) to be between two Side plates (7) is centered and that devices (11 to 19) for fixing the discs (5> 6) in a predetermined position and for the selective displacement of these disks (5 »6) when changing the working level for setting the machine to the level required for a specific work process Conditions are provided. 5. Machine according to claim 1 or 2, characterized characterized in that the devices for fixing each disc (5 »6) by a Locking lever (11) are formed, which is fixed between the side plates (7) of each disc (5, 6) and shifts with these that this one _ 3 - Locking lever (11) has a head made of elastomeric material (14), over which it is connected to a toothed track (15) can be brought into engagement that this head with the help of a pressure device (19) in any any position of the discs (5, 6) along the width of the machine can be actuated to the locking lever to set against the toothed web (15) on the elastomer material (14), and that on this Way the disc is held in a selected position. 4-, machine according to one of the preceding claims, characterized in that the pressing devices (19) for the head of the locking lever (11) are formed against the toothed track (15) by a pneumatic hose (19), whose Inflating said pressing causes the head of the locking lever (11) an element (13) with rounded Has surface for contact with the pneumatic hose (19) and that the head of the The opposite end of the locking lever (11) is exposed to the action of elastic devices (12), which cause a position reset of the locking lever (11) at the end of the braking process. 5. Machine according to one of the preceding claims, characterized in that to carry out the selective displacement of each disc (5 »6) in one direction or the other a retractable element (18) is provided which is extended at a predetermined point in time and ~ ': l Γ:: Vl 34166U - Zj. - comes into engagement with an approach (16) of the individual cutting or embossing units to this approach and thus to move the entire cutting and embossing unit into the desired position. 6. Machine according to claim 5 »characterized that the retractable element (18) acting on the end of each cutting or embossing unit is the rod (18) of a fluid operated Is cylinder, which is displaceable with the help of a threaded spindle (20) on a The central axis is arranged parallel to the drive shafts (4) of each block carrying the disks (2) is arranged. 7 · Machine according to claim 5 or 6, characterized characterized in that a mechanical drive (25) for the displacement and the actuation the retractable element (18) is provided which acts on the end of each cutting or embossing unit, so that an automatic shift of these units regardless of the number of discs and the Size of these shifts is possible. 8. Machine according to one of the preceding claims, characterized in that Adjusting devices (22, 23 »24) for selective Adjustment and regulation of the contact pressure between each corresponding pair of cutting discs (5) are provided and that this contact pressure depending on the operating condition and the State of wear of the cutting disks (5) and the like controlled or canceled in the idle state of the disks. 9. Machine according to claim 8, characterized in that the devices designed to regulate the contact pressure between the cutting disks (5) in the locking lever (11) are, which is arranged with a certain play between the side plates of the disc (5) that continues the control devices (22, 23) counteracting elastic devices (24 ·) are arranged, so that a displacement of the side plates (7) and thus the associated disc (5) to one side in Depending on the pressure in the control devices (22, 23) is possible, this pressure for the individual disks can be controlled independently and can be canceled when the disks are at rest «. 10. Machine according to claim 8 or 9> characterized in that the locking lever an inlet line for compressed air to a chamber (22) having an elastic membrane (23) is provided, which is supported against the side plates (7), while the elastic means (24) are formed by a spring. 11. Machine according to one of the preceding claims, characterized in that the side plates (7) of each disc with the help of two slide guide rods (9) and open bearings (8) Z-'UZ ^: 'O ^: r 34166 H are led. 12. Machine according to one of the preceding claims, characterized in that Drive devices are provided which are connected to the drive shafts via coupling devices (28 to 32) (4) connectable to drive the active disks while those in the rest position Disks are disengaged. 13. Machine according to one of the preceding claims, characterized in that the drive shafts (4) have a longitudinal dimension Excessive with respect to the width of the strip-shaped material, so that at least at one end of the drive shafts, a storage space is formed for cutting or embossing disks (5, 6) that are not required will. 14. Machine according to one of the preceding claims, characterized in that for tilting each block (2) with respect to the frame (1) Actuating pressure cylinders acting in the opposite direction to the machine are provided.