DE2060731A1 - Device for surface treatment of bodies with an oval cross section (circular arc shape), especially for screen printing machines - Google Patents

Description

Werner Kammann, 980 Bünde-Westf., Elsemühlenweg 9o

"Device for the surface treatment of oval (circular arc-shaped) cross-section Bodies, especially for screen printing machines "

The invention relates to a device for surface treatment of bodies with an oval cross-section (circular arc-shaped), in particular for single-color or multi-color printing in one Screen printing machine.

In the screen printing machines that have become known in various designs so far, bodies of oval cross-section are by means of a swivel device with a certain radius on the printing stencil, so that only a partial area their surface, which has a radius of curvature corresponding to the set pivot radius, is printed. Thieves-

209826/0278

Printing of two opposing surfaces of an oval (circular arc-shaped) body requires in a disadvantageous manner two separate prints.

It is also known to print the oval body from both sides in a machine, where two in a complex manner separate swivel devices connected by a complicated body transfer, two printing templates and two Squeegees are provided. Long set-up or changeover times are required in this design, and the Body transfer to print errors due to register tolerances.

The object of the invention is to create a simple and cost-saving built-up device for double-sided surface treatment of bodies with an oval cross-section (circular arc-shaped), which eliminates the previous shortcomings.

Another object of the invention is to provide an oval (circular arc-shaped ) To print the body with one clamping while avoiding misprints in one operation and thus the Reduce printing time. With a printing stencil and one or two squeegees, the surfaces of the body with both Images are printed in the same color or in different colors.

Furthermore, the device should pick up and print the bodies both semi-automatically and fully automatically, and be efficient Enable way of working.

According to the invention is a device for surface treatment of bodies with an oval (circular) cross-section, in particular for single-color or multi-color printing in a screen printing machine by one the body for treating two opposing, preferably its two opposing longer (larger) cross-sectional sides (lateral surfaces) in a body holder and with the two Casing surfaces one after the other on the machining tool

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(Printing stencil) or transmission device (intermediate carrier ) leading and processing facility marked. The processing facility is synchronous designed for the movement of the printing stencil or transmission device and coupled with this in terms of movement.

It is preferred that the processing device with a one

he

To equip body posture for body recording having control part, which is mounted pivotably about a pivot axis, with this pivot axis on one driven by the pressure template Drive wheel or a transmission wheel is held and by a stationary, in a control path of the control part bordering control axis on a bilateral approach of the body to the printing stencil and the body rolling the movement path causing the printing stencil is positively guided.

The control part is held with its control path on the control axis by compressive or tensile stress and thus shows a flawless restraint.

Two opposite one another are advantageously used to hold the body Recordings (bottom and top mounts) provided, the bottom mount being driven by the control part and the tip pick-up is synchronously carried along by the bottom pick-up. There is also the option of both recordings to be provided on each control unit and by a transmission gear both recordings are displayed at the same time; "- ■" ■ ··> ·

There is also the possibility of providing only one body holder, for example a push-on mandrel, on which the to printing body is clipped on.

For printing the two sides of the body in different colors, it is preferred to use a printing stencil divided into two fields two associated squeegees are to be provided, which alternate

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BATH ORIGINAL

-Ij-.

dependence on the printing stencil movement in the working position and their switching occurs when the body is turned from one side to the other.

Further features of the invention emerge from the other subclaims.

The subject matter of the invention extends not only to the features of the individual claims, but also to their combination.

The device according to the invention enables a simpler, more cost-saving and a double-sided surface treatment, in particular printing in cross-section, in a trouble-free manner Circular arc-shaped bodies, the surface treatment of the two body surfaces advantageously in a body restraint takes place and thus misprints are excluded - since the body remains in a restraint for both sides, there are transfer times excluded and the printing time shortened.

The body to be printed is in its received position by the unwinding device according to the invention with its two Pages brought up to the printing stencil in a flawless manner and depending on the printing template movement and on this processed - registration tolerances are therefore ruled out.

The bodies can be semi- or fully automatic in a favorable manner insert it into the unwinder and remove it again.

By reducing the screen stroke, which is usually possible with screen printing machines with a reciprocating screen the device can be quickly converted to one-sided, known circular arc printing for decorating additional colors on only one side with a correspondingly smaller sieve, as the decor requirements in practice show.

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209826/0278

BAD ORJÖfNÄL.

In the case of printing units placed one behind the other, so-called • traaeen, so don’t need to run along empty-handed or disengaged if gftas or partially unilaterally Surface treatment desired 1st «'

Due to the closed · construction of the Binrlehtusg, sugehorit * u only one template «ad XsJmI» lets see the Kinba «in called · üniyerealmasohinen for ru »4e» flat, conical, ssw. Realize body-consciousness, without dta üniYeraaleharekter sohr £ nken *>

209826 / 027Ö BAD ORIGINAL · · · ■

Exemplary embodiments of the invention are shown in the drawings. Show it :

Fig. 1 is a perspective view of a screen printing machine with a reciprocable underneath Printing stencil with fixed squeegee arranged unwinding device for oval (circular arc-shaped) bodies, with two opposite, body holding rings arranged on a control part,

Fig. 2 is a side view of the same screen printing machine with unwinding device,

3 shows a schematic representation of the unwinding device with control part and printing stencil in the initial printing position one side of the body,

4 shows a schematic representation of the processing device in body reversal position to change body side,

5 shows a schematic representation of the unwinding device in the final printing position of the other side of the body,

6 is a perspective view of the screen printing machine with a modified unwinding device;

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BATH ORIGINAL

7 is a side view of the screen printing machine according to FIG Fig. 6,

Fig. 8 is a schematic representation of a modified one Settlement facility,

Fig. 9 is a sectional front view of two print fields having printing stencil with two associated, alternately working squeegees in working position the one squeegee,

Fig. Io is a front view in section of the same printing stencil with the squeegees in squeegee change position,

11 is a front view of the same printing stencil in the working position of the other doctor blade,

12 shows a side view of a mandrel as a body holder with body, partially cut.

An inventive apparatus for surface treating _s of in cross-section circular arc-shaped (oval) bodies Io, particularly for single- or multi-color printing in a screen printing machine has below a machining tool, for instance below a reciprocating or rotating stencil sheet 11 with a fixed blade 12, a body Io for treating (printing) two opposite (the two longer or shorter) cross-sectional sides (lateral surfaces) loa, lob receiving in a body holder 13a, 13b

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BAO ORIGINAL

and with the two lateral surfaces loa, lob one after the other to the machining tool 11 or a transmission device, such as intermediate carrier? as well as on this unwinding (rolling) device I ¹ I ₃ IS.

The processing device 15 is synchronous with the movement of the Formed printing stencil 11 and rigidly connected to the printing stencil 11 so that the movement of the respective Body Io dependent? from the stencil movement .

) The processing device 15 has a body removal effecting, Exchangeable control part 16 movable about a pivot axis 2o; the axis pivotably holding the control part 16 2o is according to Pig. I and 2 for example on a lever 21 of a shaft 17 rotatable about a central shaft 17 extending in the longitudinal direction of the body, exchangeable Drive wheel 18 attached and according to the embodiment of Fig. 6 and 7 are mounted on a transmission wheel 19 which is rotatable about the central shaft 17 with an exchangeable drive wheel 18. The control part pivot axis 2o can be spaced from the central rotating shaft 17 for different sized development radii adjust.

The control part 16 is by means of a fixed control axis 22 on a body surface loa, lob to be printed in each case the printing stencil 11 leading up and the body rolling on the printing stencil 11 forcibly guided movement path. The control part 16 has one of the curvature of the two body surfaces to be printed loa, lob adapted and a pivoting of the Control part 16 about its axis 2o for alternately bringing the body Io to the printing stencil 11 control path provided 23, which is formed by a recess in the control part 16; the control path 23 shows two opposite, corresponding of the body shell surfaces to be printed loa, lob oppositely curved control surfaces, which at their two curvature

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each end in a pivoting of the control part or the end position of the body as well as the initial position run out for printing resulting slot, these two slots running with their lengths in the same direction can be kept different lengths in order to continue pivoting between the pressure of the two body surfaces loa, lob in the initial pressure position than when pivoting back, preferably with the template moving back and forth, into the starting position.

The control part 16 is preferably by means of tensile or compressive stress by a spring 24, 25 with its control path 23 on a guide roller 22 forming the fixed control axis held, so that a perfect curve sequence of the control part 16 is guaranteed; the control part 16 is through this Spring force with its curved path (unwinding path 23) is always held (pulled) against the guide roller 22 and it arises thus a precise sequence of movements (processing path) for the with this control part 16 through the receptacle 13 during the Surface treatment connected body Io.

The control part 16 and the wheel 18 causing its rotational movement is provided interchangeably and is replaced by a respective one Control part 16 corresponding to surface curvatures and wheel 18 adjusted to these surface curvatures can be replaced. In the execution of the unwinding device 14 according to FIGS. 1 and 2, this is movable to and fro with a toothed rack 26 Printing stencil 11 meshing drive gear 18 on a Hollow shaft 27 is mounted and takes the axis of rotation on a lever 21 connected to the gear 18 or some other type of part 2o, so that between this drive gear 18 and the Control part 16 has a movement-related connection (rotary movement). The guide roller 22 is supported on a with a die

209826/0278

The non-rotatable central axis, which extends through the hollow shaft 27, is rigidly connected to the bearing part 28 and is on this bearing part 28 adjustable at a distance from the central shaft 17.

The body holder (floor receptacle) 13a, which preferably accommodates the floor area of the body Io, is connected to the control part 16 by a connection axis 29. To this connecting shaft 29 move rigidly connected to the control part 16 accesses a guided in a bearing body 3o the screen printing machine transmission rod 31 (guide shaft), on which there is a body counter support 13b, preferably ψ a tip receiving, equipped boom 32b attached. The transmission rod 31 can be moved up and down and is held pivotably in the bearing body 3o and is pressed downwards under tension by a spring force (compression spring) 25, so that by this spring force 25 the control part 16 with its path of movement 23 on the Control axis (guide roller) 22 is held.

The two opposing body mountings 13a, 13b are thus supported by the transmission rod 31 and the boom 32 moved synchronously.

In the modified version of the unwinding device 15 according to FIGS. 6 and 7, the hollow shaft 27 with the superimposed Printing stencil rack 26 meshing drive wheel 18 and at the axial distance in front of it is the one that receives the axis of rotation 2o Transfer gear 19 arranged - both gears 18, 19 are rigidly connected to each other and on the same Shaft 27 supported.

Through this hollow shaft 27, in accordance with the embodiment according to FIGS. 1 and 2, a non-rotatable shaft 17, on which the bearing body engages 28 is attached to the adjustable control shaft 22.

The one connected to the transmission gear 19 by the axis 2o

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Sfreu part 16 is in a direction of curvature of the movement path 23 lying end area provided rotatable about the axis 2o and at its other end area engages a tension spring 24 with a End at; the other end of this tension spring 24 is connected by a lever 33 to the transmission gear 19 and below Tension held. By means of this tension spring 24, the control part 16 with its cam track 23 is always held against the control axis 22. On the control part 16, a base mount 13a and a tip mount opposite thereto are fixedly connected to it 13b is also attached to a control part 16, which is held rotatably and pivotably on a transmission gear 19 in accordance with the other control part.

For uniform movement of both body supports 13a, 13b the two opposing gears 19 are connected to one another in terms of movement by gears 34 (gears).

The one for printing in the two body holders 13a, 13b Manually or automatically introduced body Io is controlled by the one or both control parts 16 at the start of printing in the manner shown in FIG position shown under the printing stencil 11 held. The printing stencil 11 moving in the direction of the arrow transmits its Displacement movement by the drive wheel 18 in a rotary movement on the control part 16, which is by the spring 24, 25 with his Cam track 23 is always held on the fixed control axis 22 when its body surface to be printed slides off corresponding curvature surface the body Io on the printing template 11 shifts. During this printing process, the control part 16 does not move relative to the drive system (gear 18, 19). After the end of printing the first body side loa, however, the control part 16 comes over its curve shape with the end-side Slot to the control axis 22, which turns around (pivoted) about its axis of rotation 2o - see Fig. 4 - and automatically gets into the initial pressure position for the second side of the body lob and wiedp? relatively persistent.

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Now the second side of the body lob is rolled on the printing stencil 11 for printing; if this is done, the moves reciprocating printing stencil 11 in the opposite direction and the control part 16 pivots into the initial printing position return. The dead weight of the control part 16 with mounting bracket 13a, 13b and body Io as well as the squeegee pressure that occurs are absorbed by the guide roller 22.

If the one receiving the guide roller 22 in the printing end position, the circumferential control part pivot axis 2o averted slot of the control part movement path 23 designed so long, that its end extends on the guide roller circular path - the end of the slot lies on the guide roller circular path, when the control part 16 with its slot end on a passing through the central axis 17 and the pivot axis 2o Straight line - so the processing device 14, 15 can also be driven continuously, e.g. with round sieves, whereby then during the longer pivoting time to the initial pressure position In contrast to the swiveling between the prints, the printing body swivel can take place in the position according to Fig. 4, but rotated further by 180 ° (in a Position of the control part 16).

The embodiment w with a driven counterholder 13b according to FIGS. 6 and 7 is preferably used for automatic operation and the embodiment according to FIGS. 1 and 2 without a driven counterholder is used for the semi-automatic operation for manual body insertion by an operator to achieve the required freedom 13b provided.

The two opposite body holders 13a, 13b can be axially in an embodiment not shown Provide rotatable to the control part 16 and e.g. by a positively driven control lever or the like. before and after printing in a horizontal takeover and delivery position, for example

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$ 1

bring so that the oval (circular arc-shaped) body is Io by means of an intermittent, stationary transport device in the body take-over and release area, such as chains with carriers, the processing device 14,15 can be fed.

In addition, a continuous body supply can also be provided be, e.g. input in position according to Fig. 3 and delivery in Position according to FIG. 5, during the relative rest during the reversal the reciprocating stencil movement. This is usually done by reducing the sieve stroke Screen printing machines with reciprocating stencil possible is - the pressure body position according to Fig. 3 as the initial pressure position only viewed on one side with the end of printing according to FIG. 4, before the reversal begins - this is how the unwinding device just adjust by shortening the sieve stroke on one-sided pressure with a correspondingly smaller sieve and / or one-sided additional Make decorations.

In the further embodiment shown schematically in FIG of the unwinding device 35, the bodies to be printed lozum rolling on the printing stencil 11 are pivotable about the center 17 and held in their receptacles 13a, 13b so as to be linearly displaceable for page change. The schematic representation shows one oval (circular arc-shaped) body Io with its large Settlement circle 36 in its two positions, each the opposite sides loa, lob form a sector of a circle.

The receptacle for the body holder is arranged on a wheel 37 rotatable about the axis 17 and is used for rolling the body Io twisted. After printing on the first body side loa, the recording is made on a linear path 38 through point 17 move and the other side of the body lob reaches the large development circle 36, where now by turning the wheel 37 this side put praise in the pressure area and the body io is rolled on the printing stencil 11.

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The mount for the body holder is in guides of the wheel 37 held displaceably and the Aufnähmeverschrift can by pneumatic, hydraulic or mechanical devices be moved.

The entire processing device 14, 15 is more preferred Way about an axis running transversely to the longitudinal axis of the body (axis of rotation), so that in this device 14,15 also conical oval body Io can be printed. Furthermore, the device 1 * 1.15 can be moved up and down, Execute height adjustable as well as set up on the printing stencil center position.

For printing the two opposite each other in different colors Body surfaces loa, lob a printing stencil 39 divided into two printing fields 39a, 39b is provided, the two Squeegees 4o, 4l are assigned, which are alternately brought into working position in their field 39a, 39b. The two squeegees 4o, 4l are shifted diagonally upwards to the working position and waiting position, which occurs during the swiveling time of the body Io from one print side to the other - erfo ^; the moves a squeegee 41 from the previous working position into the waiting position and the other squeegee 4o that has been waiting until now reaches the Working position (see Fig. 9 to 11). The control of this doctor blade 4o, 41 is dependent on the printing stencil displacement movement.

The processing device according to the invention is in particular ' intended for screen printing machines - but it can also be used for scarfing or other surface treatment will.

By choosing a different size of the driving wheels and transmission wheels, Curved design of the control path on the control section and arrangement of the control section swivel axis, the various

2O9826 / Q270

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The most varied of oval (circular arc-shaped) cross-sectional shapes and sizes on the surface.

Pig. 12 shows an embodiment of a body mount. To hold the body Io during the pressing is here a conical push-on mandrel 42 is provided, onto which the body Io is pushed and held by clamping. The cross-sectional shape of the conical plug-on mandrel 42 can be circular, oval or be angular; If necessary, the push-on mandrel 42 can be designed to be adjustable. The body holders 13a, 13b, 42 are exchangeable intended.

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Claims (1)

Claims Device for surface treatment of bodies with an oval cross-section (circular arc-shaped), in particular for or multicolored printing in a screen printing machine by one the body for treating two opposite, preferably its two opposite longer (larger) cross-sectional sides (lateral surfaces) in a body holder receiving and with the two lateral surfaces one after the other to the processing tool (printing stencil) or transfer device (Dye subcarrier) leading as well as at this shifting device. 2. Device according to claim 1, characterized in that the processing device (14, 15) is synchronous with the movement of the printing stencil (11) and is coupled in terms of movement to the printing stencil (11). 3. Apparatus according to claim 1 and 2, characterized in that the processing device (14, 15) is a replaceable Has control part (16) which is driven around a pivot axis (2o) of the printing unit (11) and around a central axis (17) rotatable wheel (18,19) or wheel (18) and lever (21) pivoted and supported by a Fixed control axis (22) on one of the body surfaces to be printed (loa, lob) on the printing stencil (11) approaching and is positively guided on this rolling trajectory. 4. Device according to claims 1 to 3, characterized in that that the control part (16) of the unwinding device (14, 15) with a recess formed by a, - 16 - 209826/0278 corresponding to the curvature of the two body surfaces to be printed (loa, lob) and the pivoting of the Control part (16) about its pivot axis (2o) causing control path (23) is equipped. Device according to claims 1 to 4, characterized in that the control path (23) of the control part (16) zva. has opposing control surfaces that are opposite to each other according to the body surfaces (loa, lob), which at their two ends of curvature terminate in a slot which causes the control part (16) to pivot or which results in the end position of the body, and both of which have different slots with their longitudinal direction in one direction Have lengths, with the unwinding device also being progressively drivable by making the slot of the side opposite the pivot axis (2o) of the control part (16) correspondingly long. Device according to Claims 1 to 5, characterized in that that the control part (16) under compressive or tensile stress, preferably by a spring (24, 25) one of the fixed control axis forming guide roller (22) is held and with its control path (23) rolls on this guide roller (22). 7. Device according to claims 1 to 6, characterized in that that the unwinding device (15) of a stationary mounted on a central hollow shaft (27) replaceable drive gear (18) is driven. 8. Device according to claims 1 to 6, characterized in that that the swivel axis (2o) of the control part - 17 209826/0278 (16) of the unwinding device (14, 15) adjustable, preferably radially adjustable on a transmission gear (19) or is attached to a lever (21), which is interchangeable with one driven by the printing unit (11) Drive gear (18) on a common hollow shaft (27) is arranged. Device according to Claims 1 to 8, characterized in that that the drive wheel (18) or the drive wheel (18) and the transmission wheel (19) or wheel (18) and lever (21) carrying hollow shaft (27) is passed through by a fixed axis (17), on whose end on the body side of a bearing body which holds the guide roller (22) adjustable at a distance from the axis (17) (28) is attached. Io. Device according to Claims 1 to 9, characterized in that that on the control part (16) of the unwinding device (14, 15) an end region of the body (lo), preferably the interchangeable body holder (13a) which accommodates the floor area, is fixed in a rigid manner, which is synchronized in motion with an exchangeable body receptacle (13b) holding the other body end area is. 11. Device according to claims 1 to Io, characterized in that that around a connecting the floor bracket (13a) to the control part (16) of the unwinding device (14) Axis (29) one of the control part (16) movable up and down and pivotable, in a bearing body (3o) slidably and pivotably held guide axis (31) grips, which carry the tip holder (13b) - 18 209826/0278 '^7> * ^m ■■ ■■ - ■' ■: - ■■■ "- (I- !! -« illS ¹ »F ·! ■ ·;! ■■■: ■ ·: ' in ■■ - the boom (32) and which by a compression spring (25) holds the control part (16) on the guide roller (22) under compressive stress. 12. Device according to claims 1 to Io, characterized in that the bottom and top holder (13a, 13b) of the unwinding device (15) are each attached to a transmission wheel (19) and these two transmission wheels. (19) are coupled to one another so that they can move freely by means of intermediate gears (3 ^{1 O)} 13. Device according to claims 1 to Io and 12, characterized characterized in that the two opposite control parts (16) of the processing device (15) through each one acting on the transmission wheel (19) at one end and attached at the other end to the area of the control part (16) opposite the pivot axis (2o) Tension spring (24) are held under tension on the guide roller (22). lh. Device according to claims 1 to 13, characterized in that the two opposite interchangeable body receptacles (13a, 13b) are designed to be axially rotatable and lockable with respect to the control part (16) for different body input and output positions with automatic body feed. 15. The device according to claim 1, characterized in that that the processing device (35) the to be printed Holds body (Io) pivotable for rolling and linearly displaceable to change sides. - 19 209826/0278 l6. Device according to claim 1 and 15, characterized in that the unwinding device (35) on one with the wheel (37) coupled in terms of movement to the printing stencil (11), a holder that receives the body (Io) possesses, which is displaceable in a linear guide (38) is provided. 17. Device according to claims 1 to 1β, characterized gekennzächnet that the processing device (14, 15, 35) is vertically and / or laterally displaceable and / or pivotable for conically oval bodies about an axis extending transversely to the longitudinal direction of the body. l8. Device according to Claims 1 to 17, characterized in that that the settlement facility (14,15) through Stencil stroke reduction with the reciprocating drive also for one-sided surface treatment of im Cross-section of oval (circular arc-shaped) bodies (Io) can be used. characterized 19 · device according to claims 1 to l8, / by an in two printing fields (39a, 39b) subdivided printing stencil (39), the two each provided for one field (39a, 39b) and squeegees (4o, 4l) that can be brought into the working position depending on the stencil movement are assigned, which are alternately designed to be vertically displaceable. 2o. Device according to Claims 1 to 19, characterized by a conical push-on mandrel (42) as a body holder ( -recording ). 209826/0278 Leeward