EP0142635A1 - Dispositif de commande pour une machine d'estampage - Google Patents

Dispositif de commande pour une machine d'estampage Download PDF

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Publication number
EP0142635A1
EP0142635A1 EP84110020A EP84110020A EP0142635A1 EP 0142635 A1 EP0142635 A1 EP 0142635A1 EP 84110020 A EP84110020 A EP 84110020A EP 84110020 A EP84110020 A EP 84110020A EP 0142635 A1 EP0142635 A1 EP 0142635A1
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EP
European Patent Office
Prior art keywords
drive device
embossing
electromagnet
drive
lever
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84110020A
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German (de)
English (en)
Inventor
Helmut August Michael Schöttle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adrema Maschinenbau GmbH
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Adrema Maschinenbau GmbH
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Publication date
Application filed by Adrema Maschinenbau GmbH filed Critical Adrema Maschinenbau GmbH
Publication of EP0142635A1 publication Critical patent/EP0142635A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/38—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for embossing, e.g. for making matrices for stereotypes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/0052—Machines or apparatus for embossing decorations or marks, e.g. embossing coins by pressing
    • B44B5/0057—Machines or apparatus for embossing decorations or marks, e.g. embossing coins by pressing using more than one die assembly simultaneously

Definitions

  • the invention relates to a drive device for an embossing machine, by means of which two mutually complementary embossing dies, which are opposite one another in a rest position at a rest distance, can be pressed with an embossing pressure relative to an embossing plate held between the embossing dies in an embossing position.
  • Such embossing machines are used to emboss characters or other symbols on embossing plates in the form of metal or plastic signs.
  • This can be, for example Address plates act as they are used in mail processing machines or also so-called identification cards, such as those used as credit cards.
  • the opposing embossing dies are axially displaceable in the circumferential area of two disks which are at least at a spacing from each other and are arranged in a rotationally fixed manner on a common shaft.
  • This shaft is rotatably mounted in a frame on which an actuating lever extending approximately transversely to the shaft is articulated approximately in its center on both sides of the pair of disks.
  • One free ends of the opposing actuating levers are provided with axially directed thrust bolts with which a desired pair of stamping dies can be brought into alignment by rotating the pair of disks.
  • the opposite free ends of the actuating levers run on a cam disk arranged between these free ends with an axis of rotation perpendicular to the pivot axis of the actuating levers, during the rotation of which the free ends of the actuating levers provided with the pushing bolts approximate one another and thereby insert the selected pair of stamping dies onto one between them Embossing plate can be pressed with an embossing pressure.
  • the two mutually complementary embossing stamps one of which generally has a recessed and the other a raised mirror image of the sign to be embossed , are pressed against one another with great force, so that the embossed plate arranged in between has the correct raised or recessed sign arises.
  • the forces required for embossing characters or numbers of the usual kind depend on the shape and The size of the sign as well as the hardness and thickness of the embossing plate to be embossed vary and lie approximately in a range between 1000 and 7000 N. However, the adjustment paths along which these high forces actually occur are very small because the embossing height of an individual sign is only in the Of the order of 0.5 mm. Thus, the load-bearing parts of the embossing machine such as axles, bearings and levers, as well as the drive device are only slightly loaded during a large section of the embossing cycle, while high bearing forces occur in a remaining small area of the embossing cycle and high torque must be produced by the drive device.
  • the drive device in the known embossing machine must be switchable so that the desired character can be set by rotating the pair of discs carrying the embossing dies and the embossing carrier can also be brought into the desired row and column position before the embossing process.
  • a clutch is therefore required, which must be dimensioned for the maximum torque occurring during the stamping process.
  • a drive device for an embossing machine is also known (DE-OS 31 35 505), in which the requirement of a clutch designed for high torques in the drive device is avoided in that the cam disk driving the actuating lever is permanently driven.
  • displaceable force Transfer elements instead of the push pins for the embossing dies, which are firmly connected to the free lever ends, displaceable force Transfer elements provided, which can be pushed or withdrawn by electromagnets in the power transmission path between the actuating lever and the die.
  • the embossing die When the force transmission element is in its retracted position, the embossing die is not acted on, despite the permanent drive of the actuating lever which is effected by the cam disk, so that in this retracted position of the force transmission element the desired embossing character can be set and the embossing plate guided into the desired position.
  • this known drive device must also be dimensioned for the maximum torque.
  • the relatively complex electromagnet arrangement is required for the displacement of the power transmission element.
  • the force transmission elements can only be pushed in or withdrawn at the dead center of the continuously running embossing drive, so that an average dead time of the embossing machine is required which corresponds to half the cycle time of the continuously running embossing drive.
  • the invention is based on the object of improving the load distribution in a drive device for an embossing machine of the type mentioned at the outset, while avoiding the aforementioned disadvantages, and in particular of avoiding a heavy-duty clutch.
  • this object is achieved by a first drive device having an adjustment stroke corresponding to the rest distance of the dies, less the thickness of the die, by means of which the dies can be moved relative to one another along the adjustment stroke to the die and a second drive device having a small die stroke in relation to the adjustment stroke, through which the embossing dies brought up to the embossing plate can be acted upon with the embossing pressure.
  • the first drive device serves to bring the selected stamps closer together so that they straighten the stamping plate touch.
  • the first drive device can be dimensioned so easily that it can only overcome the friction within the guides and bearings of the embossing machine and any existing restoring forces with sufficient certainty.
  • the adjustment forces to be applied along the adjustment stroke up to the point of contact with the embossing plate are scarcely more than 50 to 100 N and thus only about 0.7 to 1.5% of the maximum forces that occur when the required embossing pressure is applied.
  • the embossing force which in practice lies approximately in the range between 1000 and 7000 N, is applied by the second drive device during the embossing stroke, which is very small in relation to the adjustment stroke.
  • the second drive device must therefore be designed for high forces, but only requires a very small working stroke.
  • a preferred embodiment of the drive device is characterized in that the second drive device has as the drive source an electromagnet with an armature movable along the stamping stroke.
  • the electromagnet is particularly suitable for the application of very high forces with very small adjustment paths and leads to great operational reliability and structural simplicity of the second drive device.
  • electromagnets as drives for riveting and impact drilling devices.
  • the required high impact forces are achieved in that an armature of the electromagnet is accelerated to a high speed along a relatively long path and converts its kinetic energy into an impact pulse when it strikes a rivet or a drill.
  • this is associated with a strong noise.
  • the embossing process is carried out quasi-statically by the second drive device provided with the electromagnet, since in this electromagnet the armature only carries out the movement of a few tenths of a millimeter required for embossing the sign.
  • the very high pressure rise speed of more than 2000 N / ms and the correspondingly high acceleration of the armature its movement takes place at a relatively low speed, because practically all the energy coupled out on the moving parts is used for the stamping process. The amount of energy remaining for noise generation is therefore very low and practically negligible.
  • An embodiment of the drive device according to the invention which is particularly suitable for an embossing machine, which has two actuating levers which are at a distance from one another and are articulated on a frame of the embossing machine with an articulation point located between their free ends, and between which opposing one free ends the opposing embossing dies can be arranged and can be acted upon by means of these free ends in the direction of the embossing plate and at whose opposite other free ends the drive device acts, characterized in that the free ends of the lever arms of a toggle lever are articulated at the other free ends of the actuating lever whose joint connecting the lever arms is articulated to a pushrod provided with the armature and guided through the axis of the electromagnet of the second drive device, the free end of which is in axis by the first drive device direction is acted upon.
  • This embodiment is based on The required interaction of the first and the second drive device is ensured in a structurally simple manner in that the forces caused by the two drive
  • the first drive device has a cam disk which acts on the free end of the push rod and is driven by an electric motor via a clutch.
  • the clutch only needs to be designed for the small force required to overcome friction and restoring forces, because the first drive device only serves to overcome the adjustment stroke of the push rod, whereas the embossing pressure is applied by the second drive device.
  • the first drive device has a drive lever which is arranged approximately transversely to the axial direction of the push rod, engages with one free end at the free end of the push rod and is fixedly articulated with its other free end with respect to the frame, which is operated by an electromagnet can be acted upon in the axial direction.
  • the particular advantage of this embodiment is that the number of moving elements is reduced due to the elimination of the drive motor and the clutch. This results in lower manufacturing costs and less maintenance because there are fewer parts subject to wear. In addition, the idling noise caused by a permanently running drive motor is eliminated.
  • the toggle lever is acted upon by the restoring force of a restoring spring, by means of which the two actuating levers can be adjusted into a rest position corresponding at least to the rest distance of the dies.
  • the return spring is designed as a frame spring with its one end fixed and with its other end arranged on the joint of a further toggle lever, one lever arm with its free end at the other free end of one of the actuating arms and whose other lever arm is articulated to the frame.
  • a first and a second electromagnet of the second drive device are provided, each with an actuating member which can be displaced along a common axis by the electromagnet and has the armature, between the free ends thereof which face one another the opposing embossing dies can be arranged in the embossing position and can be brought into engagement with the actuating members at their free ends facing away from one another, and that the actuating members can be approached to one another by the adjustment stroke by the first drive device.
  • the embossing pressure is advantageously transmitted directly to the actuators of the embossing stamp, so that no intermediate, highly resilient lever system is required.
  • the two actuators can be operated independently of one another by the second drive device.
  • the first drive device has two drive levers arranged approximately opposite one another transversely to the common axis, the free ends of which are remote from the common axis are articulated with respect to the embossing machine, the opposite free ends of which can each be brought into engagement with the corresponding actuating member and which can each be acted upon with a torque acting in the direction of the stamping dies.
  • the drive levers need only be designed for the low load occurring during the adjustment stroke.
  • the drive levers are biased into their rest position by spring force against the torque acting in the direction of the dies.
  • a further embodiment of these embodiments is that the first drive device has two crank drives driven by a motor via a clutch, which are each connected via a coupling rod to a pivot point located between the ends of the drive levers. Since only the small force required for the adjustment stroke has to be applied by the engine, the clutch, the crank mechanisms and the coupling rods can be dimensioned accordingly light.
  • This embodiment is preferably designed such that the two crank drives have a different stroke.
  • one of the strokes can be dimensioned such that the embossing plane is determined by the assigned embossing stamp, in which case this embossing stamp then acts as a fixed abutment.
  • the drive levers of the first drive device are each provided with an armature plate between their ends, to which the torque can be applied by means of an electromagnet opposite the armature plate.
  • This embodiment has the advantage of a reduced number of moving parts and is therefore characterized by high operational reliability and low maintenance.
  • the actuating members are designed as push rods which are guided through the axis of the electromagnet and on which the armature designed as a radially extending plate is fixed.
  • This embodiment allows the magnetic force exerted by the electromagnet to be transmitted directly to the respective actuating member and thus ensures high efficiency on the one hand and great structural simplicity on the other hand by avoiding force transmission members.
  • a particularly effective utilization of the magnetic force is achieved in this embodiment in that the plate forming the armature is arranged on the push rod at a distance approximately corresponding to its maximum stroke from the end face of the electromagnet facing away from the die.
  • a further feature of this embodiment which is characterized by structural simplicity and low friction is further that the free ends of the drive levers which can be brought into engagement with the push rods are in each case on the face of the die facing away from the die Anchor-forming plate can be supported.
  • the armature assigned to one of the two electromagnets of the second drive device can be brought up to this electromagnet by the first drive device, and this electromagnet when its armature is applied by a first pulse is energized for a certain duration, and that the armature assigned to the other electromagnet is displaceable up to a distance corresponding to the maximum embossing stroke in front of these other electromagnets and in this position of its armature is excited by a second pulse which starts later than the first pulse and which is associated with the first Impulse ends.
  • the armature brought up to its electromagnet by the first drive device is held in place by the first pulse during its duration, so that the embossing die assigned to this armature forms a fixed abutment for the embossing, which at the same time determines the embossing plane.
  • the second stamp then applies the stamping force to the other stamping die from the other electromagnet and carries out the stamping stroke. After the completion of the two impulses, the actual stamping process is ended, so that the stamping dies can return to their rest position by elastic return forces.
  • the invention also provides that the electromagnet of the second drive device is excited by a discharge pulse from a capacitor. This measure makes it particularly easy to achieve a sufficiently rapid increase in force in the electromagnet.
  • the pulse energy is controlled as a function of the type of the embossed mark.
  • This measure makes it easy to take into account the requirement that all characters of an embossing text should have the same embossing height as possible so that a subsequent typeface of this embossing text produces a uniform typeface.
  • the very different embossing force as a result of the different character size and line length for producing the same embossing height can be achieved particularly easily by appropriately controlling the pulse energy.
  • the stamping stroke cannot be influenced in known stamping machines with eccentric or connecting rod drives.
  • the different embossing forces adapted to the character size can thereby only be achieved in that - the stamper formed of different lengths and the more or less strong spring-back of the frame is used to generate the different levels of embossing forces.
  • embossing dies of the same length can be used in the above embodiment of the invention, since the embossing force by Change in the energy supplied to the electromagnet can be changed in a simple manner depending on the selected characters.
  • the above measure can be implemented particularly advantageously in that the pulse energy is controlled in the discharge circuit by selective parallel connection of charging capacitors of different capacitance.
  • the selective switching on of a specific charging capacitor in the discharge circuit can advantageously be carried out with a thyristor.
  • An embodiment which is particularly advantageous in this context is characterized in that the pulse energy is controlled by a microprocessor.
  • the pulse energy supplied to the magnets can be changed in a simple manner.
  • an embossing machine 1 has a frame 2 with two actuating levers 3, 3 'which are approximately parallel at a distance from one another and which are located at an articulation point 6 or 6 located between their free ends 4, 5 or 4', 5 ''are pivotally mounted on the frame 2 in a common plane.
  • two disk-shaped type drums 7, 7' which are arranged at a distance parallel to one another and which are centered on an axis of rotation extending approximately perpendicular to the actuating levers 3, 3 'in the pivoting plane of the actuating levers 3, 3' 8 are attached.
  • Embossing dies 9, 9 ' are guided axially displaceably in the outer peripheral region of the type drums 7, 7'.
  • the opposing embossing dies 9, 9 ' which are aligned along an axis parallel to the axis of rotation 8, are complementary to one another, that is to say that, for example, the embossing die 9 has a raised and the embossed stamp 9' has a recessed mirror image of a character to be embossed.
  • the two die 9, 9 ' are by return springs 10, 10' biased 'a rest position, they face in an idle distance in the.
  • An embossing plate 14 to be embossed for example an address plate or an identification card, is held by a guide device (not shown) between the embossing dies 9, 9 'lying in their embossed position on the common axis line.
  • a guide device not shown
  • the embossing dies 9, 9' are pressed against the embossing plate 14 by means of the intermediate plungers 12, 12 ', so that when a sufficient embossing pressure is applied, the desired character is embossed into the embossing plate.
  • the push rod 19 engages a first drive device 23 through which the push rod 19 is axially displaceable in the direction of an extension of the toggle lever 16.
  • the adjustment stroke of this first drive device corresponds to a mutual approach of the pressure screws 11, 11 'and an associated displacement of the opposing dies 9, 9' until they come into contact with the die plate 14.
  • the first drive device 23 just overcomes the mutual idle distance Embossing dies 9, 9 'minus the thickness of the embossing plate 14. Since the embossing plate 14 has not yet been embossed, the first drive device 23 therefore only needs to overcome the friction and the restoring forces within the embossing machine 1.
  • a second drive device 24 has an electromagnet 25 through which the push rod 19 is guided centrally along its axis corresponding to the direction of action.
  • an armature 26 in the form of a radial plate is formed on the push rod 19 at a distance from the end face of the electromagnet 25 that corresponds at least to the adjustment stroke of the first drive device 23 plus a small stamping stroke the push rod 19 attached.
  • the first drive device 23 has a cam disc 27 which acts on the free end 22 of the push rod 19 and is rotatably mounted about an axis which is perpendicular to the push rod 19 and is stationary with respect to the frame 2.
  • the cam plate 27 is driven by an electric motor 29 via an electromagnetically actuated clutch 28.
  • the clutch 28 is switched on, whereby the cam 27 is rotated counterclockwise by the electric motor 29.
  • the armature 26 arranged on the push rod 19 approaches the electromagnet 25 of the second drive device.
  • the two lever arms 15, 15 'of the toggle lever 16 and also the two lever arms 20, 21 of the further toggle lever are moved in the direction of their extended position, but the adjustment stroke of the first drive device 23 only goes so far that the pressure screws 11, 11 'operated stamping dies 9, 9' touch the stamping plate 14 held between them.
  • the stamping dies 9, 9 'are thus only brought up to the stamping plate 14 by the first drive device 23.
  • the electromagnet 25 of the second drive device is supplied with an electrical pulse via a power source (not shown), as a result of which the toggle lever 16 is stretched even further and the stamping dies 9, 9 'along a small stamping stroke in relation to the adjustment stroke of the first drive device a high embossing pressure are pressed against the embossing plate 14, whereby the actual embossing takes place.
  • the further toggle lever with the lever arms 20, 21 serves to bring the lower punch 9 'in Fig. 1 during the stamping process into a defined plane with respect to the guide device (not shown) for the stamping plate 14 in order to avoid or at least prevent the stamping plate 14 from bulging to keep within the smallest possible limits.
  • FIG. 2 differs from that shown in FIG. 1 only in the design of the first drive device 23.
  • This has a drive lever 30 arranged approximately transversely to the push rod 19, which has one free end 31, which is upper in FIG. 2, at the free end 22 of the push rod 19 rests and is articulated with its other free end 32 with respect to the frame 2.
  • An anchor plate 33 is attached to the drive lever 30 between its free ends 31, 32 in opposition to one with its effective axis parallel to the axial direction of the push rod 19 of the electromagnet 34 which is fixed in relation to the frame.
  • the drive lever 30 is opposite to that in the sense of an extension of the toggle lever 16 directed direction of action of the electromagnet 34 is biased by a return spring 35 in the direction of a limit stop 36.
  • the operating sequence is the same as in the embodiment shown in FIG. 1, the electromagnet 34 first being energized to actuate the first drive device 23, as a result of which the push rod 19 is moved along the adjustment stroke by means of the drive lever 30 to such an extent that the dies 9, 9 'die Touch embossing plate 14.
  • the actual embossing then takes place, as in the embodiment shown in FIG. 1, by actuating the second drive device 24.
  • the second drive device has first and second electromagnets 37 (MI) and 37 '(M2), on a common axis corresponding to their direction of action, with which the stamping dies mounted in the type drums 7, 7' 9.9 'can be aligned by rotation about the axis of rotation 8, are arranged on both sides of the type drums 7,7'.
  • the two Electromagnets 37, 37 ' are each provided with an actuator 38, 38 ' , which is designed as a push rod 39 and 39 ', which is guided along the axis through the electromagnet 37 and 37'.
  • the push rods 39, 39 ' are each biased at their free end 40 or 40' facing away from the type drum 7 or 7 'by return springs 41 or 41' opposite to the type drums 7, 7 'in a rest position in which the the type drums 7, 7 'pointing to the other free ends 42, 42' of the push rods 39 and 39 'with little play face the free ends facing them of the dies 9 and 9', which are located at their mutual rest distance.
  • the armature designed as a radial plate is on the push rod 39 or 39 'at a distance approximately corresponding to its maximum stroke from the end face of the electromagnet 37 or 37' 43 or 43 'attached.
  • the first drive device has two drive levers 44, 44 'which are arranged approximately transversely to the common axis of the push rods 39, 39' and are at approximately parallel spacing from one another and have free ends facing away from the push rods 39, 39 ' 45 and 45 'are articulated with respect to the embossing machine 1 and their opposite free ends 46, 46' are each supported on the end face of the armature 43 or 43 'facing away from the electromagnet 37 or 37'.
  • the total stroke b of the crank mechanism or eccentric 47 ′ is smaller than the total stroke a of the crank mechanism or eccentric 47.
  • the armature 43 resting on its free end 46 is brought into direct contact with the end face of the electromagnet 37 facing the armature 43.
  • the push rod 39 moves simultaneously against the action of the return spring 41 in the direction of the die 9 and lifts it until it comes into contact with the die 14.
  • the push rod 39 ' is displaced so far in the direction of the stamping die 9' by the drive lever 44 'having the smaller stroke that there is still an air gap sufficient for the stamping stroke between the armature 43' and the end face of the electromagnet 37 '(M2 In this position, the stamp 9 'touches the stamping plate 14.
  • the electromagnet 37 (MI) of the second drive device is energized first, so that its armature 43 adheres to it. Then, after a short delay, the electromagnet 37 'of the second drive direction is also energized, as a result of which the actual stamping process takes place.
  • the electromagnet 37 thus takes on the task of a fixed abutment and therefore determines the plane in which the embossing takes place. Then the drive levers 44, 44 'move back into their rest position, the push rods 39, 39 'also return to their starting position under the action of the return springs 41, 41'.
  • the embossing dies 9, 9 'under the pretension of the return springs 10, 10' thus release the embossed embossing plate 14 so that a new character can be brought into the embossing position.
  • FIG. 5 differs from that shown in FIG. 3 only in the configuration of the first drive device.
  • the drive levers 44, 44 ' instead of coupling the drive levers 44, 44 'to the crank drives 47, 47', the drive levers 44, 44 'there are provided between their free ends with anchor plates 51 and 51', each of which is opposed to an electromagnet 52 and 52 ', respectively exerts a torque on the respective drive lever 44 or 44 'in the direction of a mutual approach of the dies 9,9'.
  • a return spring 53, 53 ' acts on the drive levers 44, 44' against the direction of action of the electromagnets 52 (M3) and 52 '(M4), which biases the drive lever 44 and 44' against a stationary stop 54 and 54 ' .
  • FIG. 6 The operating sequence of the embodiment shown in FIG. 5 is shown in detail in FIG. 6.
  • the electromagnet 52 '(M3) is first energized to initiate an embossing process, as a result of which the drive lever 44 moves counterclockwise against the action of the return springs 41 and 53, and the armature 43 and the same connected push rod 39 until the armature 43 touches the electromagnet 37 (Ml) of the second drive device.
  • the electromagnet 37 (Ml) is energized and holds its armature 43.
  • the electromagnet 52 (M3) is switched off, so that the drive lever 44 returns under the action of its return spring 53 to its initial position limited by the stop 54.
  • the stamp 9 is thus in its working position in which it touches the stamping plate 14.
  • the electromagnet 52 '(M4) of the first drive device is also energized, as a result of which its drive lever 44' displaces the push rod 39 'with the armature 43' to such an extent that the die 9 'is likewise the die plate 14 touches.
  • the electromagnet 37' in this position there is a sufficiently large distance between the armature 43 'and the end face of its electromagnet 37' (M2) that the actual stamping stroke is carried out by subsequently energizing the electromagnet 37 'of the second drive device .
  • the electromagnet 52 '(M4) of the first drive device is switched off shortly after the electromagnet 37' (M2) of the second drive device has been energized, as a result of which the drive lever 44 'is released and is returned to the stop 54' under the action of its return spring 53 '.
  • the electromagnets 37, 37 'of the second drive device are also switched off, as a result of which the armatures 43 and 43' are released.
  • the embossing force F required to achieve a uniform embossing height for all characters to be embossed varies depending on the size of the character to be embossed or the line length.
  • the embossing force F for different types of material of the embossing plates 14 is shown in FIG. 7 as a function of the different characters plotted on the abscissa.
  • the required embossing force increases in the direction of the letters "M” and "W”.
  • the control of the embossing force as a function of the character to be embossed takes place in the embodiments shown in FIGS. 1, 2, 3 and 5 by a suitable control of the power supply for the electromagnets 25 and 37, 37 'of the second drive device.
  • FIGS. 8 and 9 An embodiment of a power supply for the drive device shown in FIG. 5 is shown in FIGS. 8 and 9.
  • pulse capacitors 56, 57, 58 with protective and decoupling resistors 59, 60, 61 are connected in series and then in parallel in a charging circuit fed from the AC network via a rectifier diode 55.
  • the Pulse capacitors 56, 57, 58 are thus charged to the peak value of the AC voltage in the charging circuit.
  • a discharge circuit for the pulse capacitors 56, 57, 58 consists of the two electromagnets 37, 37 'connected in series, this series circuit having one end directly connected to the common connection point of the pulse capacitors 56, 57, 58 and the other end over each a thyristor 62, 63, 64 is led to the connection of the pulse capacitors 56, 57, 58 opposite the common connection point.
  • the electromagnets 37, 37 ' are also bridged by a free-wheeling diode 65 and 65', which are opposite to the excitation current of the electromagnets 37, 37 'and prevent overvoltages when the electromagnets 37, 37' are switched off. Furthermore, a pre-excitation circuit is connected to the electromagnet 37, which is formed from a protective diode 66, a switching transistor 67 and a low-voltage power supply unit consisting of a full-wave rectifier circuit 68 and a smoothing capacitor 69. Through this pre-excitation circuit, the electromagnet 37 receives the pre-excitation energy required for holding on to its armature 43 described in connection with FIG. 5 before the actual embossing process is triggered.
  • the electromagnets 37, 37 ' can be selectively supplied with the discharge pulse from the pulse capacitors 56, 57, 58. If the capacitance of the pulse capacitors 56, 57, 58 is selected in the ratio 1 to 2 to 4 in the exemplary embodiment shown in FIG. 8, the pulse energy can thus be controlled in the ratio 1 to 7 by the optional firing of the thyristors 62, 63, 64 will. In this way, a range of variation which is generally completely sufficient is obtained in order to adapt the embossing force to the selected character and to obtain a uniform embossed image.
  • the fineness of the gradation can be increased as desired by adding further pulse capacitors and thyristors. For example, due to the slight additional effort of adding a further thyristor and a further pulse capacitor with eight times the capacitance of the smallest stage, the pulse energy can be changed in a ratio of 1 to 15.
  • the electromagnets 52, 52 'of the first drive device are supplied with energy from a further low-voltage power supply unit having a full-wave rectifier circuit 70 and a smoothing capacitor 71, to which the electromagnets 52, 52' are connected via a switching transistor 72 and 72 ', respectively.
  • the electromagnets 52, 52 ' are bridged with free-wheeling diodes 73 and 73', respectively.
  • the control of the switching transistor 67 serving for pre-excitation, the switching transistors 72, 72 'for the operation of the first drive device and the thyristors 62, 63, 64 serving for the actual stamping process is expediently carried out, for example, by a microprocessor, since the switching processes are then achieved with simple means in any time sequence can be.
  • the switching sequence described in connection with the embodiment of FIG. 5 can be controlled.

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  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Printers Characterized By Their Purpose (AREA)
EP84110020A 1983-08-24 1984-08-22 Dispositif de commande pour une machine d'estampage Withdrawn EP0142635A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833330563 DE3330563A1 (de) 1983-08-24 1983-08-24 Antriebsvorrichtung fuer eine praegemaschine
DE3330563 1983-08-24

Publications (1)

Publication Number Publication Date
EP0142635A1 true EP0142635A1 (fr) 1985-05-29

Family

ID=6207344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110020A Withdrawn EP0142635A1 (fr) 1983-08-24 1984-08-22 Dispositif de commande pour une machine d'estampage

Country Status (3)

Country Link
EP (1) EP0142635A1 (fr)
JP (1) JPS6071276A (fr)
DE (1) DE3330563A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462201A4 (en) * 1989-03-06 1993-05-19 National Business Systems, Inc. Improved card embossing machine and method
EP0445225A4 (en) * 1988-11-23 1993-05-19 Datacard Corporation Card embossing apparatus and method
WO2008003777A3 (fr) * 2006-07-07 2008-12-31 Muehlbauer Ag Installation d'estampage et procédé d'estampage de cartes
IT202000029363A1 (it) * 2020-12-01 2022-06-01 Annarita Borrelli Dispositivo per la realizzazione di una marcatura a rilievo

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4678355A (en) * 1985-07-02 1987-07-07 Xerox Corporation Print tip contact sensor for quiet impact printer
CA1325921C (fr) * 1985-12-12 1994-01-11 Data Card Corporation Machine a estamper, a entrainement direct par solenoides
FR2608257B1 (fr) * 1986-12-12 1989-05-19 Inst Francais Du Petrole Procede pour bruler du gaz et bruleur a gaz a jet axial et jet divergent
US5320435A (en) * 1988-06-09 1994-06-14 Datacard Corporation Direct solenoid drive imprinting mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348821A1 (fr) * 1976-04-20 1977-11-18 Rapid Data Syst Int Machine de marquage en relief
DE1952938B2 (de) * 1968-10-21 1979-05-23 Data Card Corp., St. Paul, Minn. (V.St.A.) Verfahren zum Prägen eines flachen Gegenstandes sowie Vorrichtung zur Durchführung dieses Verfahrens
DE3135505A1 (de) * 1980-10-20 1982-08-12 Data Card Corp., 55343 Minnetonka, Minn. Vorrichtung zum antrieb einer praegevorrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1722627U (de) * 1956-02-22 1956-05-17 Wuertt Spindel Fabrik G M B H Lagerung der zwillingswalzen von streckwerken auf ringspinnmaschinen.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1952938B2 (de) * 1968-10-21 1979-05-23 Data Card Corp., St. Paul, Minn. (V.St.A.) Verfahren zum Prägen eines flachen Gegenstandes sowie Vorrichtung zur Durchführung dieses Verfahrens
FR2348821A1 (fr) * 1976-04-20 1977-11-18 Rapid Data Syst Int Machine de marquage en relief
DE3135505A1 (de) * 1980-10-20 1982-08-12 Data Card Corp., 55343 Minnetonka, Minn. Vorrichtung zum antrieb einer praegevorrichtung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445225A4 (en) * 1988-11-23 1993-05-19 Datacard Corporation Card embossing apparatus and method
EP0462201A4 (en) * 1989-03-06 1993-05-19 National Business Systems, Inc. Improved card embossing machine and method
US5503514A (en) * 1989-03-06 1996-04-02 National Business Systems, Inc. Card embossing machine and method
WO2008003777A3 (fr) * 2006-07-07 2008-12-31 Muehlbauer Ag Installation d'estampage et procédé d'estampage de cartes
US8205547B2 (en) 2006-07-07 2012-06-26 Muehlbauer Ag Embossing apparatus, and method for embossing cards
IT202000029363A1 (it) * 2020-12-01 2022-06-01 Annarita Borrelli Dispositivo per la realizzazione di una marcatura a rilievo

Also Published As

Publication number Publication date
DE3330563A1 (de) 1985-03-14
JPS6071276A (ja) 1985-04-23

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