EP0472021A1 - Machine à timbrer pour application d'une image sous une glaçure - Google Patents

Machine à timbrer pour application d'une image sous une glaçure Download PDF

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Publication number
EP0472021A1
EP0472021A1 EP91112925A EP91112925A EP0472021A1 EP 0472021 A1 EP0472021 A1 EP 0472021A1 EP 91112925 A EP91112925 A EP 91112925A EP 91112925 A EP91112925 A EP 91112925A EP 0472021 A1 EP0472021 A1 EP 0472021A1
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EP
European Patent Office
Prior art keywords
piston
stamp
stroke
flatware
cylinder unit
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.)
Granted
Application number
EP91112925A
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German (de)
English (en)
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EP0472021B1 (fr
Inventor
Dieter Seltmann
Herbert Prell
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.)
Porzellanfabrik Schirnding AG
Original Assignee
Porzellanfabrik Schirnding AG
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Porzellanfabrik Schirnding AG filed Critical Porzellanfabrik Schirnding AG
Publication of EP0472021A1 publication Critical patent/EP0472021A1/fr
Application granted granted Critical
Publication of EP0472021B1 publication Critical patent/EP0472021B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/001—Pad printing apparatus or machines

Definitions

  • the invention relates to a stamping machine for applying an underglaze print image, in particular the company logo, to the back of flatware parts, with a stamping mechanism which has a stamp holder driven by a double stroke with stamp, a color pallet driven by a single stroke and an ink container with application roller a conveyor for the flatware parts and with a centering device for holding the individual flatware parts during the stamping process.
  • the company logo is often attached to the back of flatware parts, in particular plates, saucers or the like made of porcelain, earthenware, etc., which is done by a printing or stamping process.
  • This print is usually monochrome and is applied to the flatware part after the first firing of the flatware part before the glaze is applied so that it is arranged under the glaze and thus protected when the flatware part is fired.
  • a stamping machine of the type described at the outset which has a common drive from which the drive of the stamping unit is removed.
  • the drive of the conveyor and of the centering unit is connected to this common drive, so that synchronization is achieved in this way, at least for certain movement sequences.
  • the conveyor is driven intermittently, for which purpose a controlled clutch is switched on in the drive train in question.
  • Such a stamping machine is often connected upstream of the immersion bath for applying the glaze, so that these two operations can be carried out in one line.
  • the flatware parts are placed one after the other on the conveyor, which consists of two belts running side by side, so that a space is formed in the central area.
  • a light barrier is arranged which switches the drive of the conveyor or the clutch of the drive train of the conveyor on or off, so that in this way the flatware part itself stops the conveyor by covering the light barrier, so that the Centering device can grasp and center the flatware part.
  • the centering unit has centering rollers which are driven symmetrically transversely to the conveying direction of the conveyor, so that the flatware part can be centered in relation to the vertical longitudinal center plane of the conveyor in the conveying direction.
  • the known stamping machine has a stamping mechanism which is designed purely mechanically.
  • a shaft is continuously driven by a chain drive, on which three control disks are seated, which have a non-circular outline, so that other movements which are coordinated with one another are tapped or controlled by this rotary movement. It is the movement of a stamp holder with stamp, a color palette and an ink container with applicator roller.
  • the stamp holder with stamp is driven in the vertical direction in the form of a double stroke, the stamp coming into contact with the color palette to take over the color and secondly being placed on the bottom of the flatware part from below in order to apply the printed image there.
  • the color palette which has an ink transfer pad, is driven back and forth in the horizontal direction with a single stroke via the second control disk.
  • the third control disc is assigned to a pivoting movement of an ink container with application roller, the ink container being under the force of a leaf spring and being loaded against the control disc.
  • the pivoting movement of the ink container is used to deliver ink from the ink container to the ink pallet or its ink transfer pad during the forward stroke of the ink pallet with the application roller, which is then removed from the stamp when it comes into contact with the ink transfer pad and delivered to the flatware part during the next stroke becomes.
  • the disadvantages of this stamp machine are that inevitable wear, particularly on the control disks and / or the bearings of the stamp holder, the ink container and the ink palette has a disadvantageous effect.
  • This wear on the individual parts has a negative influence on the accuracy of the parts relative to one another, so that the printed image can only be reproducibly kept constant with difficulty.
  • an excessively thick ink application on the ink transfer pad of the color palette leads to the stamp picking up too much ink and transferring it to the flatware part, so that the printed image does not appear fine and in thin lines, but rather comparatively wide and clumsy; this is undesirable.
  • Another disadvantage is that the inevitably occurring wear is very difficult to correct, that is, it can be adjusted away.
  • the bottom of the flatware pieces is often arched at different heights, in comparison with one another in different flatware items, but also with the same flatware parts.
  • the different floor curvature depends on the respective shape, the material used, the pretreatment and other parameters.
  • the stamp is resiliently mounted on the stamp holder with the help of a spring.
  • the stroke of the stamp is limited in the known machine by the bottom of the flatware part held by the centering mechanism, the stamp from flatware part to flatware part under different conditions executes different large stroke and compresses the spring more or less. There are thus different pressing forces of the stamp when the ink is transferred to the floor, so that the printed image also looks different.
  • the invention is based on this problem and is aimed at developing a stamping machine of the type described at the outset in such a way that it produces a perfect printed image with a constant appearance over time and regardless of the stamp stroke, that is to say also of the arching of the flatware part.
  • a double-acting pneumatic piston / cylinder unit is provided as the drive for the stamp holder, that a compressible elastic member is switched on from two parts which can be moved relative to one another between the piston and the stamp and which is connected to a spring, a pressure cushion or the like.
  • a proximity switch, sensor or the like is provided on the elastic member, which emits a control pulse for switching the effective direction of the piston of the piston / cylinder unit when the parts of the elastic member move relative to each other.
  • the stamp holder with the stamp is no longer moved mechanically via a cam or control disc, but with the help of a pneumatic piston / cylinder unit, whose basic stroke can be adjusted.
  • This basic stroke is chosen to be greater than the maximum required strokes in the case of strongly curved flatware parts or also in accordance with the fixing of the flatware part by the centering mechanism.
  • An essential element of the stamping mechanism is a compressible, elastic link between the piston and the stamp. This has two telescopically displaceable parts in the axial direction of the punch holder, which in the simplest form are biased in the working direction by an interposed cylinder spring. A pressure chamber with a gas filling can also be used as a preload. A cushion made of foamed plastic or the like can also be used. A switch which is designed as a proximity switch, sensor or the like is provided on the elastic member or relative to the two parts which can be displaced relative to one another.
  • This switch is switched on in the control circuit of a control device so that its control impulse, which arises when or shortly after the stamp is placed on the bottom of the flatware part, is emitted individually into the control of the drive of the piston / cylinder unit for the stamp holder.
  • the remaining stroke in its path and thus ultimately the compression of the cylinder spring can be determined until the top dead center of the stamp holder is reached and then the return stroke of the stamp holder begins.
  • the contact pressure of the stamp on the bottom of the flatware part can be kept constant regardless of the stroke of the stamp holder with the stamp.
  • the elastic member with its tied, prestressed spring is thus used in a double function without resulting in increased mechanical effort.
  • the fineness of the printed image can be set and influenced via the timing and dimensioning of the remaining stroke. It is important that the print image is transferred uniformly, in fine lines and easily legible and completely.
  • the new stamping machine is also comparatively less prone to failure than the purely mechanical stamping machine of the prior art.
  • the guides for the punch holder are designed to be much stronger due to the use of a pneumatic piston / cylinder unit, so that broken guides are avoided. The guidance is also accurate and the maintenance effort of the device is reduced.
  • the pretension of the spring, the pressure of the pressure pad or the like should be designed to be adjustable in order to be able to determine the amount of the contact pressure.
  • two parts of the elastic member, between which the spring is held bound are set differently in their relative position to one another, so that there is a different distance for the support of the two ends of the spring. It is also possible to use washers or to replace the spring with another spring. In all these cases, it is important to set a certain preload force on the spring, which becomes effective when the stamp hits the bottom of the flatware part.
  • the force transmitted by the spring increases somewhat by further compression of the spring, so that this maximum force then shows the contact pressure with which the punch is pressed onto the bottom of the flatware part becomes. If the pretensioning force of the tethered spring is reduced, the pressing force of the stamp ultimately also decreases during the printing process. The same applies to an increase in the preload.
  • the structure of the stamp usually also has an elastic intermediate layer, the compression of which goes into the course of movement, but does not have a negative effect on the force. This intermediate layer compensates for differences if the bottom of the flatware part is not exactly perpendicular to the axis of the stroke of the stamp.
  • the prestressing force and the pressing force can thus be set, so that a desired print image is reproducibly produced in fine lines and with great uniformity over the surface, regardless of the respective stroke of the stamp holder. This applies both to the first part of the double stroke, in which the stamp comes into contact with the color palette or ink transfer pad, and to the second part of the double stroke, in which the printed image is applied to the bottom of the flatware part.
  • the two parts of the elastic member can be guided against one another so that they cannot move axially relative to one another, but no twisting occurs with respect to one another. This ensures that the proximity switch, sensor or the like always works as a sensitive component in the same place with parts of the elastic member and thus reliably generates a signal.
  • the proximity switch, sensor or the like can be set so that the signal is generated when the two parts of the elastic member have already moved apart by 0.2 mm in the axial direction. This way can also be made adjustable.
  • a double-acting, pneumatic piston / cylinder unit can also be provided as the drive for the paint container, with a compressible, elastic member consisting of two parts which can be displaced relative to one another being connected between the piston rod and the paint container, which is connected with a spring, a pressure cushion or the like Are biased.
  • the stroke of the piston / cylinder unit is adjustable or the spring can be replaced. It is possible for the compression of the spring to be variably adjustable in the working point, for example by using washers. Adjustable spring supports can also be used.
  • the stroke up to the color palette or its ink transfer pad is largely constant and does not require guidance.
  • the stroke is constant, the only task being to adjust the contact pressure of the ink transfer roller against the ink transfer pad in order to determine the amount of ink that is applied to the ink transfer pad during a working stroke.
  • this task deviates from the problem of controlling the stamp holder.
  • a stroke on the ink container is required so that the ink pallet can carry out the return stroke into the starting position away from the stamp holder without contact with the ink transfer roller, while this contact must take place during the forward stroke of the ink pallet.
  • the pneumatic piston / cylinder units for driving the paint container on the one hand and for driving the color palette on the other hand must be coordinated.
  • the contact pressure of the ink transfer roller to the ink palette can be adjusted variably in the ways described, so that the amount of ink taken over by the stamp during each printing operation can be influenced.
  • a control device is provided for the control of the individual elements and their movement sequence, a preferably adjustable timing element being provided in order to determine the remaining stroke and over the period of time between the occurrence of the impulse of the proximity switch and the reversal of the stroke of the piston / cylinder unit of the stamp holder to adjust the print image.
  • the contact pressure is made adjustable by means of test weights. By increasing the duration of the timing element, the remaining stroke is increased, so that the tied spring together more is pressed and so far the contact pressure is increased. In a similar way, influence can be exerted via a path control of the proximity switch.
  • the stamping machine has a centering mechanism with centering rollers driven in a hub-like manner for gripping and centering the flatware part.
  • the centering rollers are arranged with their strokes at an angle to the working direction and symmetrically to the axis of the punch holder, so that the centering rollers exert force components in and against the conveying direction on the flatware part. This ensures that the centering takes place not only with respect to a vertical central plane in the conveying direction of the conveyor, but also an axially symmetrical centering with respect to the axis of the punch holder and the punch. This solves the task of actually affixing the printed image in the center of the flatware part and not, for example, off-center.
  • the centering works in this way centering on a vertical axis, not on a plateau. Circular, square or octagonal flatware parts can be centered equally. The force components directed in and against the conveying direction largely compensate for the differences in the cover of the light barrier, as they occur with octagonal or square flatware parts. The centering works with significantly increased centering accuracy compared to centering in the prior art.
  • the centering rollers can each be arranged on a slide which is guided in a guide directed towards the axis of the punch holder, a double-acting pneumatic piston / cylinder unit being provided for driving the slide with the centering rollers.
  • a centering roller sits on each carriage, which is thus guided radially to the axis of the punch holder.
  • the centering rollers are moved radially inwards or radially outwards via the drive of the slides.
  • a sliding block can be provided on each slide, which engages on the one hand in a groove on a fixed base plate and on the other hand in a groove of a turntable, the turntable being driven reciprocally in its swivel angle range by the piston / cylinder unit.
  • This enables simple and even control of the slide or the centering rollers.
  • the centering rollers consist of an axis which is surrounded by a resilient material, for example foamed plastic, and which each grip or act on the edge of the flatware part.
  • the groove in the base plate is rectilinear and the groove in the turntable is curved, in each case for a slide.
  • the arc shape is chosen so that the speed of movement of the carriage and thus the centering roller increases radially from the outside inwards.
  • the pivoting angle of the piston / cylinder unit for driving the turntable can be designed to be adjustable, specifically to the respective diameter of the flatware part to be treated.
  • the clamping pressure (contact pressure) of the centering rollers can be infinitely adjustable using a pressure switch.
  • the starting position of the centering rollers is infinitely adjustable on the rotary cylinder, so that the same ways of centering take place with different article diameters.
  • the stamping machine has a housing 1 which is composed of several parts in a plate construction.
  • An upper cover wall 2 of the housing 1 is provided with an opening 3 through which the housing 1 is open at this point.
  • a color palette 4 is slidably mounted and guided.
  • the color palette 4 is driven back and forth in the single stroke according to double arrow 5.
  • a piston / cylinder unit 6 is used for this purpose, with the piston rod 7 of which an angle piece 8 is connected, which on the other hand engages the color palette 4.
  • the cylinder of the piston / cylinder unit 6 is fixedly mounted in the housing 1.
  • the basic position of the color palette 4 is shown, that is, a position which it assumes after a forward stroke after the piston rod 7 has been moved into the cylinder of the piston / cylinder unit 6.
  • the opening 3 is covered by the color palette 4 upwards.
  • a conveyor 9 is driven continuously from two spaced-apart conveyor belts according to an arrow in the working direction 10, on which individual flatware parts 11 are guided over the stamping machine at a spacing in the working direction (10).
  • the forward stroke of the piston / cylinder unit 6 can be seen relative to the working direction 10, while the reverse stroke takes place opposite to the working direction 10 if the opening 3 is to be released upwards.
  • a centering mechanism 13 which as essential components has a stationary base plate 14 and a turntable 15.
  • a piston / cylinder unit 16 or another drive motor is provided for a reciprocating angular drive of the turntable 15 relative to the base plate 14. Due to the relative movement of the turntable 15 to the base plate 14, centering rollers 17, 18 are driven back and forth radially to the vertical axis 12 in a horizontal plane, clamping the flatware part 11 centering on the vertical axis 12 during their radially inward stroke, so that the continuously continuing conveyor 9 insofar as the flatware part 11 can no longer convey. While the flatware part 11 is held by the centering mechanism 13 centered on the vertical axis 12, a printed image 19, often in the form of the company stamp, is to be printed on the underside of the bottom 20 of the flatware part 11.
  • a piston / cylinder unit 21 with its cylinder is mounted in a stationary manner, the piston rod 22 of which is used to drive a stamp holder 23.
  • All piston / cylinder units are double-acting here, i.e. H. a defined forward stroke and a defined reverse stroke can be controlled independently of one another in terms of time.
  • a stamp 24 which is moved in the form of a double stroke per working cycle in order to take up color in the first part of the double stroke and to deliver it to the bottom 20 of the flatware part in the second part of the double stroke.
  • the stamp holder 23 has a cup-shaped part 25 which is fixedly arranged on the piston rod 22. For this purpose, it is screwed onto a thread 26 on the piston rod 22 with the aid of a thread, specifically against a shoulder 27 on the piston rod 22, and fixed by a nut 28.
  • a second part 29 slidably surrounds the part 25 and is also arranged so as to be movable relative to the piston rod 22.
  • the part 29 has a thread 30 on the outer circumference, onto which a hat-shaped third part 31 is screwed with the aid of a corresponding internal thread. It can be seen that the parts 29 and 31 can be screwed into one another to a greater or lesser extent, as a result of which the compression and prestressing of a spring 32 can be adjusted.
  • the spring 32 is supported on the one hand on part 25 and on the other hand on part 31.
  • the spring 32 is mounted and arranged in this way in the manner of a tied spring.
  • the set relative position or compression of the spring 32m is countered by a locking ring 33, which is also rotatably mounted on the thread 30.
  • the parts 25 and 29 and 31 and the spring 32 form an elastic member 25, 29, 32, which can be compressed when the piston rod 22 encounters resistance when extending.
  • part 29 lifts with part 31 from part 25 and a gap 34 is formed, the gap width of which is referred to as the remaining stroke.
  • a proximity switch 35 or another sensor is fixed in place, which responds to any gap formation and delivers a control pulse to a timer 37 with a preferably adjustable time period via a line 36.
  • the timing element 37 is connected to a control device 38, which not only processes the pulse of the proximity switch 35, but also processes and coordinates the movements of all other driven parts and the signals from the various sensors, light barriers and other parts.
  • the control device 38 also controls the piston / cylinder unit 31 with respect to its forward stroke and with regard to its reverse stroke.
  • the proximity switch 35 can be set in such a way that the pulse is already indicated when a gap 34 with a gap width of only 0.2 mm has formed after the stamp 24 has hit an obstacle.
  • an anti-rotation device 39 in the form of a fixed rod 40 is provided on the part 25, which protrudes through a bore 41 in the part 29 and thus prevents the parts 25 and 29 can twist against each other.
  • the piston rod 22, which carries the punch holder 23 and the punch 24, is driven via the piston / cylinder unit 21 in the direction of a double arrow 42 in a double stroke, i.e. H. it performs two forward and two backward strokes during a work cycle.
  • the stamp 24 is interchangeably inserted in the upper region of the part 31 of the stamp holder 23.
  • the stamp 24 has a base plate 43, on which an intermediate layer 44 made of resilient material, for example foamed plastic, is built, on which in turn a rubber cliché 45 is glued, the raised surface part of which ultimately gives off the printed image 19.
  • a snap ring 46 which engages in a groove 47 in part 31, the stamp 24 can be fixed or exchanged.
  • a further piston / cylinder unit 49 with its cylinder is arranged in a stationary manner in a further vertical axis 48 or coaxially therewith, its piston rod 50 in Direction of the double arrow 51 is also vertically movable, in a single stroke with Forward stroke and reverse stroke per work cycle.
  • the piston / cylinder unit 49 is used to drive an ink container 52 in the vertical direction according to double arrow 51.
  • Ink transfer rollers 53 and 54 and an application roller 55 are arranged in the ink container 52.
  • the application roller 55 transfers ink at the appropriate time of the working cycle to an ink transfer pad 56, which is attached to the underside of the ink palette 4.
  • the ink transfer pad 56 can be made of a rubber layer.
  • a base plate 58 is screwed against a shoulder 57 by means of a thread, on which guide walls 59 and 60, which receive the paint container 52 between them, are arranged.
  • the base plate 58 or the guide walls 59 and 60 are secured on the piston rod 50 by a lower part 62 which is hollow and has an internal thread 63 corresponding to the external thread 64 of the piston rod 50.
  • the lower part 62 has an axial extension 65, which is provided with an external thread 66, on which an upper part 67 is screwed with a corresponding internal thread 68.
  • the upper part 67 has a collar 69 which engages behind a bridge 70, on the side walls 71 of which the paint container 52 is loosely placed.
  • a spring 72 is arranged in a tied manner, one or more removable or addable washers 73 being additionally included.
  • a locking screw 74 serves to counter the relative setting between the lower part 62 and the upper part 67. The described relative setting between the upper part 67 and the lower part 62 allows an idle stroke 75, namely the distance of the highest point of the application roller 55 from the ink transfer pad 56, to be set when the piston rod 50 is in its retracted basic position, as shown in FIG. 2.
  • a work cycle which ultimately leads to the application of a printed image 19 to the floor 20 of the flatware part 11 proceeds as follows: the control unit 38 controls the double-acting piston / cylinder Unit 21 in the sense of the first forward stroke of the double stroke according to double arrow 42, as a result of which the punch holder 23 with the punch 24 moves upward in the direction of the vertical axis 12. Since the ink palette 4 with the ink transfer pad 56 is in the front position, viewed in the working direction 10, in which the opening 3 is covered, the stamp 24 with its rubber cliché 45 hits the ink transfer pad 56 on which ink is located.
  • the elastic member 25, 29, 32 Since the color palette 4 cannot move upwards, the elastic member 25, 29, 32 is compressed, the spring 32 also being compressed by a small distance.
  • the gap 34 thus forms in that the part 29 lifts off from the part 25 with the proximity switch 35.
  • the degree of compression of the spring 32 determines the contact pressure with which the rubber block 45 is pressed onto the ink transfer pad 56.
  • the gap 34 that is formed triggers a pulse at the proximity switch 35, which is passed on to the control device 38 via the timing element 37, possibly modulated in time. From there, the forward stroke of the piston rod 22 is ended upwards and switched over to the return stroke downwards.
  • the second forward stroke of the stamp holder 23 moved in the double stroke is stamped with the stamp 24 on the piston / cylinder unit 21, so that the Extends piston rod 22 a second time.
  • this second upward stroke is correspondingly longer until the stamp 24 with its rubber cliché 45 strikes the floor 20 of the flatware part 11 as an obstacle, which in the meantime has been detected by the centering mechanism 13 and has been held stationary.
  • Flatware parts 11 the same or different kind, e.g. B. plates, saucers, plates, etc., can have a differently curved base 20, so that there are different sized forward strokes until the cliché 45 hits the respective floor 20.
  • the relative position of another floor is indicated in dashed lines in FIG. 1 in order to make the different strokes that are possible understandable.
  • the dashed line also shows that the bottom 20 does not always lie exactly perpendicular to the vertical axis 12, but that, in particular in the case of octagonal plates or the like, the respective flatware part 11 is once in a slightly inclined position by the centering rollers 17 and 18 of the centering mechanism 13 is held during the printing process. Such differences are mostly compensated for by the elastic intermediate layer 44.
  • the elastic member 25, 29, 32 is again compressed, as has been described previously with the aid of the ink pickup and the first part of the double stroke. Only this time the rubber cliché 45 emits the recorded color as a print image 19 to the bottom 20 of the flatware part 11.
  • the gap 34 is formed and a corresponding pulse, possibly modulated in time with the timing element 37, is sent to the control device 38 and the residual stroke is determined and the return stroke of the stamp holder 23 is initiated with stamp 24 or from the forward stroke in switched the reverse stroke.
  • the stamp holder 23 still travels the so-called residual stroke in the area of the forward stroke after hitting the flatware part, which results in the maximum compression of the spring 32 and thus the contact pressure with which the printed image 19 is formed on the bottom 20 of the flatware part 11.
  • the elastic member 25, 29, 32 is thus used twice in its function, with the particular advantage that the contact pressure during the absorption of the color on the ink transfer pad 56 and the contact pressure on the bottom 20 of the flatware part 11 match or can be adjusted differently, depending on whether a matching or a different temporal modulation is given in the two processes with the timing element 37.
  • the centering mechanism 13 releases the flatware part 11 on the one hand, so that it is guided out of the region of the vertical axis 12 by the continuously running conveyor 9.
  • the piston / cylinder unit for the paint container 52 is actuated at the same time or in timed fashion, so that an upward movement of the paint container 52 takes place with a constant, but possibly adjustable stroke.
  • the ink palette is again moved forward in the working direction 10 via the actuation of the piston / cylinder unit 6, with ink now ultimately being rolled out of the ink container 52 onto the ink transfer pad 56 via the application roller 55.
  • This process takes the form of the following:
  • the idle stroke 75 is first bridged or passed through until the application roller 55 abuts the ink transfer pad 56.
  • the total stroke of the piston rod 50 has not yet been traveled through, but this continues its intended upward stroke, so that the paint container 52 and the bridge 70 move relative to the guide walls 59 and 60 downward and the spring 72 is compressed, whereby it reaches its greatest contact force at the end of the upward stroke of the piston rod 50.
  • This movement is controlled in such a way that the surface on the ink transfer pad 56, from which the rubber plate 45 takes the ink, is acted upon by this constant contact pressure, while the ink is rolled out there via the application roller 55.
  • This contact pressure can be adjusted in different ways. This can be done either by adding or removing washers 73. Another possibility is to replace the spring 52 with a spring of a different characteristic. A third possibility is to change the stroke of the piston rod 50 so that a different compression of the spring 72 is assigned.
  • a working cycle is expediently initiated in that a flatware part 11 moves into a light barrier 76 which is arranged to be adjustable in the working direction in order to take different flatware parts 11 into account. From the Im Pulse of the light barrier 76 not only controls the centering mechanism 13, but also the movement cycle of the stamping machine.
  • FIGS. 3 and 4 show the centering mechanism 13, which as essential components have a stationary base plate 14 and the drive actuator 15 mounted above it.
  • the drive actuator 15 is connected via a shaft 77 to the piston / cylinder unit 16 in a rotationally fixed connection, which can be moved back and forth as an angular drive according to the double arrow 78 against adjustable stops 79 and 80, so that in this way a Setting and adaptation to different sizes of flatware parts 11 can be done.
  • Figure 3 shows the top view.
  • the straight grooves 82 are arranged radially to the vertical axis 12.
  • Sliding blocks 83 each pass through two mutually assigned grooves 81 and 82 and are each fastened to a carriage 84, on which a centering roller 17 and 18 is arranged via a shaft 85.
  • Each carriage 84 is guided on a rod 86, which extends parallel to a groove 82.
  • Each rod 86 is arranged on the one hand in a middle part 87 and a bearing 88, the middle part 87 being arranged concentrically to the vertical axis 12 and the bearings 88 being fastened to the base plate 14.

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  • Details Of Cutting Devices (AREA)
EP91112925A 1990-08-21 1991-08-01 Machine à timbrer pour application d'une image sous une glaçure Expired - Lifetime EP0472021B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4026331 1990-08-21
DE4026331A DE4026331A1 (de) 1990-08-21 1990-08-21 Stempelmaschine zum aufbringen eines unterglasur-druckbilds

Publications (2)

Publication Number Publication Date
EP0472021A1 true EP0472021A1 (fr) 1992-02-26
EP0472021B1 EP0472021B1 (fr) 1994-06-15

Family

ID=6412572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112925A Expired - Lifetime EP0472021B1 (fr) 1990-08-21 1991-08-01 Machine à timbrer pour application d'une image sous une glaçure

Country Status (5)

Country Link
EP (1) EP0472021B1 (fr)
BR (1) BR9103570A (fr)
DE (2) DE4026331A1 (fr)
ES (1) ES2056531T3 (fr)
PT (1) PT98733A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0626269A2 (fr) * 1993-05-04 1994-11-30 Markem Corporation Appareil d'impression à mouvement alternatif muni d'un dispositif d'encrage tangentiel
EP0709187A1 (fr) * 1994-10-29 1996-05-01 MAN Roland Druckmaschinen AG Support pour un élément de pression pouvant être séparé de et pressé contre un cylindre d'une machine d'impression
EP0879698A1 (fr) * 1997-05-21 1998-11-25 David Wang Man Ho Un dispositif et un procédé pour imprimer une pièce d'oeuvre
CN108688305A (zh) * 2018-06-27 2018-10-23 中国长江电力股份有限公司 一种螺栓防松动标记装置及使用方法
CN115253807A (zh) * 2022-07-29 2022-11-01 郑州三华科技实业有限公司 涂料调色设备

Citations (5)

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GB911534A (en) * 1958-11-14 1962-11-28 Murray Curvex Printing Ltd Improvements in or relating to apparatus adapted for use in printing designs on articles by an offset printing process
US3261286A (en) * 1964-04-21 1966-07-19 Royal China Inc Article handling machine
GB1313301A (en) * 1969-06-17 1973-04-11 Meakin Midwinter Holdings Ltd Printing apparatus
CH543393A (fr) * 1971-09-21 1973-10-31 Lilla Roger Machine à décalquer
EP0140165A2 (fr) * 1983-09-29 1985-05-08 Wilfried Philipp Machine pour l'impression au tampon

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DE2637707A1 (de) * 1976-08-21 1978-02-23 Winterling Geb Porzellanfab Verfahren und vorrichtung zum aufbringen eines stempels auf geschirr
GB8327672D0 (en) * 1983-10-15 1983-11-16 Markem Syst Ltd Printing mechanism

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB911534A (en) * 1958-11-14 1962-11-28 Murray Curvex Printing Ltd Improvements in or relating to apparatus adapted for use in printing designs on articles by an offset printing process
US3261286A (en) * 1964-04-21 1966-07-19 Royal China Inc Article handling machine
GB1313301A (en) * 1969-06-17 1973-04-11 Meakin Midwinter Holdings Ltd Printing apparatus
CH543393A (fr) * 1971-09-21 1973-10-31 Lilla Roger Machine à décalquer
EP0140165A2 (fr) * 1983-09-29 1985-05-08 Wilfried Philipp Machine pour l'impression au tampon

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0626269A2 (fr) * 1993-05-04 1994-11-30 Markem Corporation Appareil d'impression à mouvement alternatif muni d'un dispositif d'encrage tangentiel
EP0626269A3 (fr) * 1993-05-04 1996-08-14 Markem Corp Appareil d'impression à mouvement alternatif muni d'un dispositif d'encrage tangentiel.
EP0709187A1 (fr) * 1994-10-29 1996-05-01 MAN Roland Druckmaschinen AG Support pour un élément de pression pouvant être séparé de et pressé contre un cylindre d'une machine d'impression
EP0879698A1 (fr) * 1997-05-21 1998-11-25 David Wang Man Ho Un dispositif et un procédé pour imprimer une pièce d'oeuvre
CN108688305A (zh) * 2018-06-27 2018-10-23 中国长江电力股份有限公司 一种螺栓防松动标记装置及使用方法
CN115253807A (zh) * 2022-07-29 2022-11-01 郑州三华科技实业有限公司 涂料调色设备
CN115253807B (zh) * 2022-07-29 2023-08-15 郑州三华科技实业有限公司 涂料调色设备

Also Published As

Publication number Publication date
DE4026331A1 (de) 1992-02-27
PT98733A (pt) 1993-09-30
BR9103570A (pt) 1992-05-12
DE59101929D1 (de) 1994-07-21
DE4026331C2 (fr) 1992-09-03
ES2056531T3 (es) 1994-10-01
EP0472021B1 (fr) 1994-06-15

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