EP2942195A1 - Maschine zum bedrucken von hohlkörpern - Google Patents

Maschine zum bedrucken von hohlkörpern Download PDF

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Publication number
EP2942195A1
EP2942195A1 EP15405026.4A EP15405026A EP2942195A1 EP 2942195 A1 EP2942195 A1 EP 2942195A1 EP 15405026 A EP15405026 A EP 15405026A EP 2942195 A1 EP2942195 A1 EP 2942195A1
Authority
EP
European Patent Office
Prior art keywords
station
printing
drying
hollow articles
transport chain
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
EP15405026.4A
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English (en)
French (fr)
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EP2942195B1 (de
Inventor
Marcel Gut
Marc Schabert
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.)
Packsys Global (thailand) Ltd
Packsys Global Thailand Ltd
Original Assignee
Packsys Global (thailand) Ltd
Packsys Global Thailand Ltd
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.)
Filing date
Publication date
Application filed by Packsys Global (thailand) Ltd, Packsys Global Thailand Ltd filed Critical Packsys Global (thailand) Ltd
Publication of EP2942195A1 publication Critical patent/EP2942195A1/de
Application granted granted Critical
Publication of EP2942195B1 publication Critical patent/EP2942195B1/de
Active legal-status Critical Current
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Classifications

    • 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
    • B41F17/08—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces
    • B41F17/14—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length
    • B41F17/18—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length on curved surfaces of articles of varying cross-section, e.g. bottles, lamp glasses
    • 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
    • B41F17/002—Supports of workpieces in machines for printing on hollow articles

Definitions

  • the invention relates to a machine for printing hollow articles such as cans, tubes, cartridges, other types of containers or closures.
  • Corresponding machines are known. Often, they include offset printing stations that are integrated within machine lines that include associated stations arranged upstream or downstream, respectively.
  • An example for an upstream station is a base coating station (with a corresponding drying station).
  • Examples of downstream stations are drying or over varnish stations (with corresponding further drying stations).
  • the stations are arranged along a main transport direction. Together with further stations such as the initial forming stations as well as intermediate or final necking stations, long machine lines are assembled, all stations working simultaneously, allowing for a high throughput.
  • the stations may be stacked in order to reduce the extension of the machine line along the main transport direction.
  • intermediate storage or buffer stations as well as drying stations may be arranged above or below the other stations.
  • the chain may be provided with chain pins, whereas each pin may be accommodated within one of the hollow articles in order to hold the respective article.
  • the pins are inclined with respect to a horizontal plane in order to ensure that the articles are safely held on the chain, an angle of inclination amounts to about 2 - 15°, in particular about 6 - 8°.
  • the inclination may be achieved by having a corresponding design of the chain and pins, respectively, or by inclining the entire machines (including the transport chain linking the stations) about the corresponding angle.
  • Usual designs of decorating sections, including base coating, printing and over varnish stations feature a single transport chain linking all these stations. This means that all stations are mechanically linked, i. e. if one station is running, all stations will be running.
  • the different stations of the machine line are arranged in a common working plane, the chain or chains having an operation plane which coincides or is at least parallel with the working plane throughout the entire machine.
  • the machine comprises the following:
  • an actual manufacturing line for cans, tubes, cartridges, other types of containers or closures will include additional stations such as an extrusion press, cutting, brushing and washing machines, coating machines with corresponding dryers, a necking machine and/or a packing machine.
  • additional stations such as an extrusion press, cutting, brushing and washing machines, coating machines with corresponding dryers, a necking machine and/or a packing machine.
  • buffer storage stations accumulators
  • the selection mechanism comprises a selector station having a first transport chain both constituting an infeed and a first outfeed, a second transport chain constituting a second outfeed, and a selectively engageable transfer mechanism for removing hollow articles from the first transport chain and for feeding the removed hollow articles to the second transport chain.
  • the hollow articles may thus remain on the first transport chain, being essentially unaffected by the selector station.
  • the selection mechanism is switched to another operation mode by engaging the transfer mechanism, the hollow articles will be removed from the first transport chain and fed to the second transport chain.
  • Using two separate transport chains allows for the division of the path of the articles into two paths, furthermore, the movement of the chains in both paths may be independently controlled.
  • one of the chains may be non-active or run at a manual control or test speed whereas the other chain is running at production speed. It is preferred that the selection mechanism is built up in such a way that the transfer mechanism may be engaged or disengaged during production, i. e. the engagement (or disengagement) happens in between the arrival of two subsequent articles at the transfer mechanism. This allows for switching between one outfeed and the other without any effect on the production speed.
  • the first transport chain and the second transport chain comprise each a U-shaped section arranged in a common operation plane, where the transfer mechanism in its activated state cooperates with the U-shaped section of the first transport chain for mechanically removing hollow articles fed by the first transport chain in a lateral direction with respect to the common operation plane and for feeding the removed hollow articles to a conveyor mechanism for feeding the removed hollow articles to the second transport chain by moving the articles back against the lateral direction.
  • a side moving conveyor is used.
  • the U-shaped sections may be arranged side-by-side. Alternatively, they are arranged in a substantially vertical distance, which allows for transferring the articles by gravitation.
  • the articles may be captured at the base of the U-shaped section of the first transport chain by v-shaped baskets and moved in the lateral direction away from the first transport chain until they are completely removed from the chain pins of the first transport chain.
  • the baskets are moved in the transport direction of the first transport chain at the same speed as the first transport chain.
  • the baskets are moved further until the base of the U-shaped section of the second transport chain is reached.
  • the baskets are moved back against the lateral direction mentioned above, and the articles are synchronously fed to the chain pins of the second transport chain.
  • the movements of the baskets being synchronized to the movement of the two transport chains allows for automatically switching between the two outfeeds without any effect on processing speed and without any manual interaction.
  • the operating speed of the two transport chains is required to match as long as the hollow articles are transported from the first chain to the second.
  • the second chain may be operated by a different (in particularly lower) operating speed or even stand still.
  • the transport chains may be arranged in such a way that the base of the U-shaped section may be moved down or up (in or out of the baskets) instead of having a lateral deviation.
  • the transfer may be effected using vacuum transfer drums.
  • the transfer mechanism comprises a first drum for temporarily accommodating hollow articles, the first drum cooperating with the first transport chain, and a second drum for temporarily accommodating hollow articles, the second drum cooperating with the second transport chain, wherein hollow articles accommodated by the first drum may be selectively fed to the second drum.
  • the drums may be vacuum transfer drums that are known as such, that are designed and configured in such a way that hollow articles fed by the first transport chain may be accommodated by the first drum and transferred to the second drum and to the second transport chain in a first mode, whereas hollow articles remain on the first transport chain in a second mode.
  • the two drums may comprise carriages that are axially movable, i. e. linearly movable along an axis that is parallel to the rotation axis of the drum.
  • the carriages In a first axial position, the carriages may cooperate with the transport chain cooperating with the respective drum, in order to remove articles from the chain or to feed articles to the chain.
  • the articles In a second axial position, the articles are temporarily accommodated by the drum, independent from the respective chain.
  • At least the first drum comprises axially movable carriages for holding hollow articles, the axial movement of the carriages being selectively controlled by a first cam for feeding the hollow articles to the second drum or by a second cam for keeping the hollow articles on the first transport chain.
  • Controlling the movement of the carriages by cams, i. e. mechanically, is a simple and mechanically stable solution, which allows for high throughput.
  • a switch will be provided to select between the first cam (e. g. a cam that leads to axial displacement of the carriages in a certain sector of the drum) and the second cam (e. g. a straight cam, keeping the carriages in their first position).
  • the first printing station and the second printing station are arranged in different lateral positions with respect to a main operation plane of the transport chains. This allows for crossing the transport chains used for transporting the articles between the stations in the two modes in a region where they run in different operation planes and thus for a space-saving arrangement, where the printing stations are both arranged in a first horizontal plane and the drying stations are both arranged in a second horizontal plane, in particular above the printing stations.
  • a transport chain of the transport chain mechanism linking the selection mechanism to the first printing station includes twisted sections.
  • the chain may extend out from its main operation plane into a secondary operation plane and back into the main operation plane. This allows for transferring the articles between two laterally offset planes without having to employ additional lateral shifting mechanisms.
  • the first printing station is arranged next to the selection mechanism, and the operation plane of the infeed chain coincides with the operation plane of the outfeed chain of the selection mechanism.
  • the distance between the selection mechanism and the second printing station is larger (i. e. the second printing station is arranged in a downstream direction of the first printing station), and the second printing station has an operation plane of the infeed chain that is different from the operation plane of the outfeed chain of the selection mechanism.
  • the change of operation plane is achieved by the twisted sections mentioned above. Due to the fact that the distance is relatively large, a rather small inclination angle of the transport chain with respect to the two operation planes is needed. An angle of about 4 - 8° is adequate and may be reached by employing the twisted sections.
  • the chain may be bent. This alternative is feasible depending on the design of the chain actually used.
  • the transport chain mechanism comprises a first transport chain running through the first printing station and the first drying station and a second transport chain being different from the first transport chain running through the second printing station and the second drying station.
  • each of these transport chains may be constituted by a number of cooperating chains. Having separate chains for each of the printing and drying station pairs provides for higher flexibility in the product flow, especially in the downstream direction. As an example, if a station upstream from the selection mechanism, e. g. the drying station for the base coat, needs to be stopped, the following stations may continue running, evacuating and further processing the products without any product damage. Furthermore, it is possible to run one of the printer/dryer combinations at production speed and simultaneously the other printer/dryer combination at testing/proofing speed.
  • stations and transport chains will be supplemented by a suitable number and suitably arranged buffer storage stations in a manner known as such.
  • These buffer storage stations provide the flexibility that is needed to account for short-term fluctuations of the output of the upstream station as well as for short-term fluctuations of the capacity of the downstream station.
  • the machine comprises a first manual infeed for feeding hollow articles to the second printing station and the second drying station in the first mode and a second manual infeed for feeding hollow articles to the first printing station and the first drying station in the second mode.
  • manual infeed relates to an infeed that may be manually controlled on a demand basis.
  • the feeding of the hollow articles may be effected not only manually but in addition or exclusively by automated means. Having manual infeed for both printing and drying stations allows for proofing parallel to the production in the first as well as in the second mode.
  • the selector station comprises a manual infeed for feeding hollow articles to the second transport chain.
  • articles received from the infeed will remain on the first transport chain, and the second transport chain will be essentially unaffected and its operation may be independently controlled.
  • a certain number of hollow articles may be deviated to the printer which is in setup mode automatically by correspondingly controlling the selector station. This will lead to a certain gap in the production but allows for rapidly performing test prints without the need for manual feeding.
  • manually infeed hollow articles are processible by the second printing station and the second drying station in the first mode and by the first printing station and the first drying station in the second mode, in parallel with running production on the first printing station and the first drying station in the first mode or on the second printing station and the second drying station in the second mode. Accordingly, independent of the forthcoming switch between printing/drying stations, proofing may be effected off-line, in parallel to full production.
  • the machine preferably comprises a takeout station for selectively singling out hollow articles being processed by the second printing station and the second drying station in the first mode and by the first printing station and the first drying station in the second mode. This allows for automatically discharge sample/test print/setup/proofing articles after drying in the respective drying station. This ensures that these articles are not fed into the actual production run.
  • the takeout station may include a blower mechanism for selectively blowing out the hollow articles to be singled out from the chain pins they are held on.
  • the machine comprises the following stations:
  • Two or more of the stations mentioned may be integrated into a single unit.
  • the merging station may be designed in such a way that the incoming transport chains coming from the first and the second drying station, respectively, lie in two different planes having a lateral distance from each other, and that the hollow articles fed in from the two transport chains are moved in a lateral direction to a common outfeed plane.
  • the outfeed plane may correspond to one of the infeed planes or lie in between the infeed planes.
  • the crossing of the two chains linking the selector station with the first printing station and linking the selector station with the manual infeed station, respectively, may be arranged in the region of the manual infeed station. This is where the two chains run in different operation planes.
  • the manual infeed station is used for feeding test articles to the second printing station in the first mode of the machine. In this mode, it will be possible to run the outfeed of the manual infeed station at another speed (in particular lower speed) than the (empty) infeed chain linking the manual infeed station to the selector station. In the second mode of the machine articles arriving from the second outfeed of the selector station will be forwarded to the second printing station. In this case, the speeds of both respective chains will be identical. In the second mode, test articles may be advantageously manually infed at the selector station, to the outfeed that links it with the first printing station.
  • the selector station, the manual infeed station and the merging station may be designed in a similar way, featuring an infeed chain and an outfeed chain both comprising a U-shaped section, both sections being arranged in a common operation plane. They further include a selectively engageable transfer mechanism for removing hollow articles from the infeed chain and for feeding the removed hollow articles to the outfeed chain.
  • the station When used as the manual infeed station, the station may hand over all articles from the infeed chain to the outfeed chain in a first operating mode, whereas in a second operating mode, articles may be manually fed to the transfer mechanism, which will feed the articles to the outfeed chain.
  • the transfer mechanism is designed to move the articles in a lateral direction with respect to the operation plane of the chain(s). This allows for removing the articles from chain pins and for feeding the removed articles to the chain pins of another chain. In the context of the merging station, this allows for merging article flows arriving in different operation planes that are laterally spaced from each other.
  • Figure 1 is a block diagram of the printing section of a machine line according to the invention, e. g. a machine line for the manufacture of aluminium aerosol cans.
  • the machine line 1 comprises a number of sections related to different processing steps, such as a forming section, a cutting section, a coating section, the printing section, an over varnishing section, a necking section, a packing section etc.
  • Each section not only comprises the respective station but auxiliary devices such as conveyors, (buffer) storages (accumulators), dryers etc.
  • the printing section according to the invention and as described in the following may be used in the context of machine lines of different configurations. In principle it may replace prior art printing sections when down times due to the changeover of printing stations are to be reduced.
  • the printing section 100 of the machine line 1 comprises a selector station 110.
  • This station selectively routes the articles to a first path 101 or to a second path 102.
  • the selector station 110 comprises a manual inserting mechanism 111.
  • the selector station 110 is linked to a first printing station 151 and further to a first drying station 161.
  • the selector station 110 is linked to a manual inserting station 140, to a second printing station 152 and further to a second drying station 162.
  • the output of both drying stations 161, 162 pass a takeout station 170, where individual articles may be selectively singled out.
  • the articles that are not singled out at the takeout station 170 are further conveyed to a merging station 180, where the two paths 101, 102 are merged and the articles are delivered at a single output 181.
  • Figure 2 is a side view of the printing section.
  • Figure 3 is a top view showing the lower level of the printing section, i. e. the level of the printing stations as well as of the selector, infeed, takeout and merging stations, including the respective transport chains. The paths of the chains within the drying stations are not shown. They may be chosen according to prior art designs.
  • the Figures show in more detail the components of the printing section 100 mentioned above, in connection with Figure 1 , the main transport direction is from right to left.
  • Figures 2 and 3 show on a lower level the selector station 110, left to which the first printing station 151 is arranged. Again left, the manual inserting station 140 is arranged, followed by the second printing station 152, the takeout station 170 and the merging station 180.
  • the upper level features from right to left four drying stations.
  • the first drying station is arranged downstream of a base coating station that does not form part of the printing section.
  • the two drying stations 161, 162 are arranged to the left, followed by a further drying station arranged downstream of an over varnish station. Again, the latter does not form part of the printing section.
  • the different station and devices are linked by transport chains (cf. below, Figure 4 ).
  • the stations and devices mentioned before are linked as follows: From the rightmost drying station (which is assigned to the upstream base coating station), the articles are fed to the infeed of the selector station 110.
  • the selector station 110 features two outfeeds, one of them is linked to the first printing station 151 and further to the first drying station 161.
  • the other outfeed of the selector station 110 is linked to the manual inserting station 140, from there to the second printing station 152 and further to the second drying station 162.
  • the outputs of both drying stations 161, 162 are linked with the takeout station 170 and further with the merging station 180.
  • the transport chain 202 linking the selector station 110 with the manual inserting station 140 deviates from the main transport direction by an angle of about 5°, such that in the infeed region of the manual inserting station 140 the two transport chains 202, 204 lie in two planes that are clearly separated from each other in a lateral direction, which allows for crossing the two transport chains in this region.
  • the second printing station 152 lies in the plane that is defined by the respective transport chain, i. e. it is laterally shifted with respect to the first printing station 151. As shown in more detail below, the articles are transported back to a single common plane in the merging station 180.
  • Figure 4 is a side view of the printing section showing the involved transport chains.
  • the paths of the chains are slightly simplified. Only the lower level is displayed. Where necessary, different chains are indicated by different line styles.
  • a first chain 202 (short-dashed) links the drying station of the base coating station with the infeed of the selector station 110, the second outfeed of the selector station 110 and the infeed of the manual inserting station 140.
  • the chain 202 which includes a section that is inclined with respect to the usual operation planes of the chains, namely the section linking the second outfeed of the selector station 110 with the infeed of the manual inserting station 140 as well as the parallel section running in the opposite direction, linking the outfeed of the base coating drying station with the infeed of the selector station 110.
  • the chain 202 includes two regions 202c, 202d, in which the chain 202 is slightly twisted (2.5° per chain link).
  • region 202c is arranged at the upper end of a U-shaped section constituting the infeed and the second outfeed of the selector station 110, the other region, namely region 202d, is arranged substantially above the infeed of the manual inserting station 140.
  • a further chain 203 (solid line) links the first outfeed of the selector station 110 with the infeed of the first printing station 151.
  • Another chain 204 (solid line) links the outfeed of the first printing station 151 with the first drying station 161 and further with the takeout station 170 and the merging station 180.
  • a further chain 205 (short-dashed) links the outfeed of the manual infeed station 140 with the infeed of the second printing station 152.
  • a further chain 206 links the outfeed of the second printing station 152 with the second drying station 162 and further with the takeout station 170 and the merging station 180.
  • chain 204 linking the first printing station 151 with the takeout station 170 and the merging station 180 and chains 205, 206 linking the manual inserting station 140 with the second printing station 151 as well as the second printing station 152 with the takeout station 170 and the merging station 180 operate in parallel planes.
  • Figures 5A , B are schematic side views showing the printing section in two operating modes.
  • the first printing station is in production mode, whereas the second printing station is available for preparation, manual testing or proofing.
  • Figure 5B the second printing station is in production mode, whereas the first printing station is available for preparation, manual testing or proofing.
  • Chain segments transporting articles in production mode are indicated by solid lines
  • chain segments transporting articles for testing/proofing are indicated by dotted lines
  • chain segments where no articles are transported are indicated by dashed lines.
  • articles received from the drying station of the base coating station are fed on chain 202 to the infeed of the selector station 110. There, they are transported to the first outfeed, i. e. they are removed from chain 202 and loaded to chain 203. Subsequently, they are transported to the first printing station 151, taken over by chain 204 and fed to the drying station 161 associated to the first printing station 151. From the drying station 161, the articles pass the takeout station 170 (usually unaffected) and reach the merging station 180. There, the articles are loaded onto another chain transporting the articles to the next station. It is possible to manually feed articles in the manual inserting station 140 (arrow 141).
  • the articles are loaded onto another chain transporting the articles to the next station. It is possible to manually feed articles in the selector station 110, using the manual inserting mechanism (arrow 112). These manually fed articles are transported to the first printing station 151 by chain 203; there they are taken over by chain 204 and transported to the drying station 161 associated to the first printing station 152. From the drying station 161, the articles are transported further to the takeout station 170. There, all articles originating from the first printing station 151 and the associated drying station are blown out, e. g. into a container. They may be inspected, and the setup of the first printing station 151 may be accordingly adjusted.
  • Figure 6 is a schematic top view and a schematic side view of a selector station of the embodiment.
  • Two chains namely chain 202 coming from the accumulator and linking the selector station 110 to the second printing station, and chain 203 linking the selector station 110 to the first printing station, run in the same operation plane and constitute U-shaped sections, the bases of which being at the same height, slightly above a conveyor mechanism 120.
  • the conveyor mechanism 120 comprises v-shaped channels that are arranged in succession and parallel to each other on a belt conveyor, the longitudinal extension of the v-shaped channels being perpendicular to the transport direction.
  • the v-shaped channels are movable along their longitudinal extension and have annular end faces, such that they may engage the articles 2 held on the pins 202a, 203a of the chains 202, 203 and transport them in transport direction as well as in a perpendicular direction thereto.
  • the movement of the v-shaped channels may be controlled e. g. by selectively engageable cams or by using servo controls.
  • the transport path 121 defined by the movement of the v-shaped channels is schematically indicated.
  • the articles 2 transported on the incoming chain 202 are not affected by the selector station 110, i. e. the situation corresponds to the second operating mode as discussed above.
  • Articles 2 may be manually fed to the v-shaped channels, in a feeding region 122.
  • the channels move laterally and push the articles 2 onto the pins 203a of the first outfeed chain 203.
  • the conveyor mechanism 120 and the first outfeed chain 203 may be operated at a speed that is different from the operating speed of the chain 202 coming from the accumulator.
  • the articles 2 fed on chain 202 are grasped by the v-shaped channels, removed by lateral movement of the channels and fed back to first outfeed chain 203. Both chains and the conveyor mechanism 120 will run at the same operating speed and synchronized to each other.
  • Figures 7A , B are schematic top and side views of a merging station 180 of the embodiment in two operating modes.
  • processed articles are taken over from the first printing station
  • Figure 7B processed articles are taken over from the second printing station.
  • a chain 207 constitutes a U-shaped section, the bases of which being at the same height, slightly above a conveyor mechanism 184.
  • the transport plane of the chain 207 corresponds to the transport plane of the first drum 182.
  • the conveyor mechanism 184 comprises v-shaped channels that are arranged in succession and parallel to each other on a belt conveyor, the longitudinal extension of the v-shaped channels being perpendicular to the transport direction.
  • the v-shaped channels are movable along their longitudinal extension and may accommodate articles delivered on either the first drum 182 or the second drum 183, depending on their lateral position in the region of the drums 182, 183. They may transport them in transport direction as well as in a perpendicular direction thereto.
  • the movement of the v-shaped channels may be controlled e. g. by selectively engageable cams or by using servo controls.
  • the transport paths 185, 186 defined by the movement of the v-shaped channels are schematically indicated in Figures 7A, 7B .
  • the articles arrive on the first drum 182. They are taken over from the v-shaped channels of the conveyor mechanism 184, are transported simultaneously in the transport direction and in a lateral direction, away from the first drum 182. In a second phase, the channels move back laterally and push the articles 2 onto the pins 207a of the chain 207.
  • the articles arrive on the second drum 183. They are taken over from the v-shaped channels of the conveyor mechanism 184, are transported in the transport direction in a first phase. In a second phase, the channels move back laterally and push the articles 2 onto the pins 207a of the chain 207.
  • the selector station 120 shown in Figure 6 is very similar to the merging station 180 shown in Figures 7A, 7B .
  • Another very similar station is the manual inserting station 140 shown e. g. in Figures 2 and 4 . In principle, it corresponds to the selector station 120.
  • the manual inserting station 140 In the first operating mode, the manual inserting station 140 is used for manual insertion of articles. Accordingly, it will be configured just like the selector station 120 in Figure 6 .
  • the manual inserting station 140 forwards all articles to the second printing station. Accordingly, it will be configured similar to the configuration of the merging station 180 shown in Figure 7A , i. e. the articles will be removed by the conveyor mechanism from the incoming chain 202 and pushed on to the pins of outgoing chain 205.
  • FIGS 8A, 8B are schematic front and side views of a selector station of another embodiment of the invention. It may be used in place of the selector station 110 described above, in connection with Figure 6 . Again, a very similar station may be used in place of the merging station 180 described above, in connection with Figure 7 . The remaining components of the printing section, including the transport chains and the layout of the stations, may remain unchanged.
  • Two chains namely chain 202 coming from the accumulator and linking the selector station 310 to the second printing station, and chain 203 linking the selector station 310 to the first printing station, run in the same operation plane and constitute U-shaped sections, running along a section of the circumference of two vacuum drums 311, 312.
  • the plane defined by the chains 202, 203 coincides with the back end of the drums 311, 312, the pins holding the articles have an axial direction, i. e. extend parallel to the rotation axes of the drums 311, 312 pointing to the front surface of the drums 311, 312.
  • the chains 202, 203 and accordingly the drums 311, 312 include a slight angle with a vertical plane in order to ensure that the articles are safely held on the pins of the chains 202, 203.
  • Carriages 311a, 312a are supported on the drums in such a way that they are movable in an axial direction. Depending on their rotational position the axial position is controlled by a cam, the carriages 311 a, 312a may be displaced from a position A, in which they cooperate with the respective chain 202, 203 to a position B, in which the articles are released from the respective chain 202, 203.
  • the articles released from the chain 202 will be transferred by gravity from the first vacuum drum 311 to the second vacuum drum 312 in a region which is close to the smallest distance of the two vacuum drums 311, 312 (cf. arrow 313).
  • a second mode selectable by changing a mechanical switch, such that the carriages 311 a of the first vacuum drum 311 are controlled by a different (straight) cam, the carriages will retain their axial position, which means that the articles remain on the first transport chain 202 and will be transported to the second printing station.
  • two respective incoming vacuum drums may cooperate with a single outgoing vacuum drum.
  • the carriages of the outgoing vacuum drum will be controlled in such a way that articles may be received from the respective incoming drum. Again, control of the carriages may be effected by different cams, and a mechanical switch may be provided to select the appropriate cam.
  • the invention is not limited to the described embodiments.
  • the specific arrangement of the stations and the build-up of the individual stations may be different.
  • Additional station, in particular accumulators, may be arranged in between the described stations.
  • the invention provides a machine for printing hollow articles such as cans, tubes, cartridges or other types of containers that allows for high throughput also in case of smaller lots.

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EP15405026.4A 2014-05-02 2015-03-31 Maschine zum bedrucken von hohlkörpern Active EP2942195B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH6552014 2014-05-02

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EP2942195A1 true EP2942195A1 (de) 2015-11-11
EP2942195B1 EP2942195B1 (de) 2018-04-18

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CN (1) CN105034571B (de)
HK (1) HK1213847A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11203208B2 (en) 2016-07-08 2021-12-21 Showa Aluminum Can Corporation Printing apparatus and can body manufacturing system

Citations (2)

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EP2100733A1 (de) * 2008-03-11 2009-09-16 Polytype S.A. Modular aufgebaute Lineardruckmaschine zum Bedrucken von Hohlkörpern mit unterschiedlichen Druckverfahren

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EP2942195B1 (de) 2018-04-18
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CN105034571A (zh) 2015-11-11

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