CN214295072U - Printing apparatus for printing in circumferential direction - Google Patents

Abstract

The utility model belongs to the technical field of print, solved current printing apparatus and had the great technical problem in occupation of land space, provided a printing apparatus who prints along circumference, equipment includes: the rotating mechanism is used for driving the printing medium to rotate around the axis of the rotating mechanism; a printing mechanism for ejecting liquid on a printing medium; the output end of the rotating mechanism is in transmission connection with the rotating mechanism, and the rotating mechanism drives the rotating mechanism to move towards or away from the printing mechanism in a circular motion mode; the printing mechanism comprises at least two printing mechanisms, each printing mechanism is used for printing partial image data of an image to be printed, the rotating mechanism drives the rotating mechanism to move to the position of each printing mechanism for printing, and then the rotating mechanism moves to the position of the next printing mechanism for printing until the printing image is generated on the surface of a printing medium. The utility model has the technical advantages of small occupied space and compact structure.

Description

Printing apparatus for printing in circumferential direction

Technical Field

The utility model relates to a print technical field, especially relate to a printing apparatus who prints along circumference.

Background

For the printing medium with the shape of a cylinder or a cone, it is difficult to print patterns or characters on the circumferential side surface, and the traditional technology only adopts screen printing, which is inefficient. In order to solve the problem of low efficiency of the traditional screen printing, the circumferential side surface of the cylinder or the cone is sprayed and printed in an ink-jet printing mode afterwards. Existing ink jet printing schemes typically utilize a single print station to sequentially ink jet print the print media. If the image to be printed needs to be printed on the printing medium step by step, a plurality of devices are needed and are arranged in a streamline form to process the printing medium in sequence, so that the occupied space is large when the devices are arranged in the streamline form, and the space required by the whole production is large; therefore, the existing printing equipment has the technical problem of large occupied space.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a printing apparatus who prints along circumference for there is the big technical problem in occupation of land space in current printing apparatus.

The embodiment of the utility model provides a printing apparatus who prints along circumference, equipment includes: the rotating mechanism is used for driving the printing medium to rotate around the axis of the rotating mechanism; a printing mechanism for ejecting liquid on a printing medium; the output end of the rotating mechanism is in transmission connection with the rotating mechanism, and the rotating mechanism drives the rotating mechanism to move towards or away from the printing mechanism in a circular motion mode; the printing mechanism comprises at least two printing mechanisms, each printing mechanism is used for printing partial image data of an image to be printed, the rotating mechanism drives the rotating mechanism to move to the position of each printing mechanism for printing, and then the rotating mechanism moves to the position of the next printing mechanism for printing until the printing image is generated on the surface of a printing medium.

Further, the printing mechanisms are provided with at least four; each of the printing mechanisms is used for ejecting liquid with different materials on a printing medium.

Further, the printing mechanism includes at least: a first printing mechanism, a second printing mechanism and a third printing mechanism; the first printing mechanism is used for preprocessing a printing medium; the second printing mechanism is used for jetting ink to a printing medium; the third printing structure is used for spraying varnish on a printing medium.

Furthermore, the number of the rotating mechanisms is consistent with that of the printing mechanisms, and each rotating mechanism corresponds to one printing mechanism.

Further, the rotating mechanism includes: a drive motor and a turntable; the turntable is connected with the rotating mechanism in a forming mode, the turntable is in transmission connection with the output end of the driving motor, and the driving motor drives the turntable to drive the rotating mechanism to move towards or away from the printing mechanism.

Further, the apparatus further comprises: and the curing mechanism is used for curing the liquid sprayed on the printing medium by the printing mechanism.

Furthermore, the number of the curing mechanisms is consistent with that of the printing mechanisms, and each curing mechanism is positioned between two adjacent printing mechanisms.

Further, the printing apparatus further includes: a fixing mechanism; the fixing mechanism is connected with the curing mechanism, the rotating mechanism and the fixing mechanism are arranged on the same central shaft, and the curing mechanism is arranged corresponding to the rotating mechanism.

Further, the printing mechanism includes: a cross beam and a printing trolley; the printing trolley is connected with the cross beam in a relative sliding mode, and the sliding direction of the printing trolley is consistent with the axis direction of the rotating shaft.

Further, the printing mechanism further includes: the lifting component is connected with the printing trolley and drives the printing trolley to lift.

To sum up, the utility model has the advantages that:

the printing device is provided with more than two printing mechanisms, the printing mechanisms are respectively used for processing the printing media step by step, and the driving mode of the printing media is a circular motion mode for transmission, so that all the printing mechanisms can be arranged in a circular array mode, the structure of the whole device is more compact, the occupied area of the whole device is smaller, the technical problem that the occupied space of the existing printing device is larger is solved, and the printing device has the advantages of smaller occupied space and compact structure.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings, and these drawings are all within the protection scope of the present invention.

Fig. 1 is a schematic perspective view of a printing apparatus according to a first embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a side view of FIG. 1;

fig. 4 is a schematic perspective view of a printing apparatus according to a second embodiment of the present invention;

FIG. 5 is a view showing a state in which a head for printing a small-sized printing medium discharges ink;

fig. 6 is a diagram showing a state in which ink is discharged from a head that prints a large-sized printing medium.

Parts and numbering in the drawings:

1. a rotation mechanism; 11. a rotating electric machine; 12. a rotating body; 2. a printing mechanism; 21. a cross beam; 22. a mounting seat; 23. a spray head; 231. a nozzle; 24. a longitudinal adjustment mechanism; 3. a rotating mechanism; 31. a drive motor; 32. a turntable; 33. a fixing mechanism; 4. a curing mechanism; 41. a curing frame; 42. a curing light; 5. a print medium.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In case of conflict, various features of the embodiments and examples of the present invention may be combined with each other and are within the scope of the present invention.

The present invention will be described in further detail with reference to fig. 1 to 6.

The utility model discloses a first embodiment provides a printing apparatus who prints along circumference, and it is shown with fig. 2 to combine, and this equipment includes: the rotating mechanism 1 is used for driving the printing medium 5 to rotate around the axis of the rotating mechanism 1; a printing mechanism 2 for ejecting liquid on a printing medium 5; the output end of the rotating mechanism 3 is in transmission connection with the rotating mechanism 1, and the rotating mechanism 3 drives the rotating mechanism 1 to move towards or away from the printing mechanism 2 in a circular motion mode; the printing mechanisms 2 are at least two, each printing mechanism 2 prints a part of image data of an image to be printed, the rotating mechanism 3 drives the rotating mechanism 1 to move to the position of each printing mechanism 2 for printing, and then the rotating mechanism moves to the position of the next printing mechanism 2 for printing until a printing image is generated on the surface of the printing medium 5.

The printing device provided by the embodiment of the utility model is suitable for the printing mode of printing along the circumferential side, for example, the printing medium 5 is a cylinder or a cone, or the printing area is a cylinder or a cone; or the printing medium 5 may be wound around a cylinder or a cone, so that the printing medium 5 is attached to the cylinder or the cone, and a printing area of the printing medium 5 forms a circumferential form, and is the printing medium 5 made of a flexible material in general, and this embodiment mainly takes the printing medium 5 as a cylinder as an example to describe in detail.

The rotating mechanism 1 comprises a rotating motor 11 and a rotating body 12, wherein the rotating motor 11 drives the rotating body 12 to rotate so as to drive the printing medium 5 to rotate, in the embodiment, the rotating body 12 is a three-jaw air chuck, and the rotating body 12 clamps the printing medium 5 so that the rotating motor 11 drives the rotating body 12 to rotate so as to drive the printing medium 5 to rotate; in other embodiments, the rotating body 12 may be a clamping mechanism such as a jaw, chuck or cylinder when the printing medium 5 is a cylinder or cone; if the printing medium 5 is made of a flexible material and needs to be attached to a cylinder or a cone, the rotator 12 may also be a cylinder or a cone, and the printing medium 5 is attached, so that the driving motor 31 drives the rotator 12 to rotate and further drives the printing medium 5 to rotate.

The rotating mechanism 3 moves in a circular motion mode, specifically, the rotating mechanism can rotate in a mode of a driving motor 31 (refer to fig. 3) and a turntable 32, the printing mechanism 2 is arranged corresponding to the circumferential side wall of the rotating mechanism 3, and the printing mechanism 2 is partially overlapped with the rotating mechanism 3, so that the structure of the whole equipment is further more compact.

Each printing mechanism 2 prints a part of image data of an image to be printed as follows: for example, it is necessary to perform a step process on the print medium 5, including step printing from the thickness direction of the print image and step printing from the length and/or width direction of the print image; the step printing from the thickness direction of the printed image can be understood as: the surface of the printing medium 5 needs to be pretreated by spraying plasma treatment liquid in sequence to form an adhesion layer; then, carrying out ink jet on the surface of the adhesion layer formed on the surface of the printing medium 5 to form an image, and then carrying out gloss oil spraying or gold stamping treatment on the image formed by the ink jet; thus, it is possible to obtain image data processed step by layer from the thickness according to the whole print image to be formed, and each printing mechanism 2 executes at least one type of image data; the length and/or width direction step printing of the printed image may be understood as: dividing the length and/or width of the printed image into a plurality of areas, printing corresponding images on each area, sequentially printing the corresponding images step by step to form local images, and finally splicing the local images to form the printed image; the rotating mechanism 1 drives the printing mechanisms 2 to move to the corresponding printing mechanisms 2 in sequence according to the image data which needs to be processed step by step, printing is completed, and finally, a printed image is formed.

Preferably, the printing device further comprises a positioning system for positioning the position of the printing medium so as to form a precise printing image on the surface of the printing medium. Specifically, the position information of the rotating mechanism may be acquired to determine the position information of the printing area of the printing medium with respect to the rotating mechanism; acquiring the outline size of a printing medium, and controlling to print a first part of image data on the printing medium to form a first image; acquiring position information of a first image, taking the first image as a reference image, confirming the position information of the next image data printing, and controlling the next part of image data to be printed until the printing is finished to form a printed image; a positioning system is added to reduce the printing error between each partial image data, so that a precise printing image is formed.

With reference to fig. 1 and 5, the printing apparatus further includes a controller electrically connected to the printing mechanism 2 for controlling the printing mechanism to operate; the printing apparatus further includes an ink bottle group in which 4 ink bottles are provided for containing red (M), yellow (Y), cyan (C), and black (K) inks, respectively; the printing mechanism 2 comprises a plurality of rows of nozzles 231 (refer to fig. 5), each row of nozzles 231 is correspondingly connected with 4 ink bottles, a required color is formed by controlling the ink output amount of each specific color so as to perform ink jet printing on the printing medium 5, namely, the color mixing of printing is realized in a single row, and for the printing medium 5 with a smaller size, one row of nozzles 231 is controlled to perform ink jet printing on the printing medium 5; more than two printing mechanisms 2 are arranged to simultaneously perform ink jet printing on different printing media 5, namely, one printing device can simultaneously process more than two printing media 5, and the processing speed is improved. A rotating mechanism 3 is arranged in a printing device, a plurality of printing media are transmitted on the rotating mechanism 3, a plurality of rotating mechanisms 1 can be arranged on the rotating mechanism 3 at equal intervals according to the intervals among the printing mechanisms 2, and the rotating mechanisms 1 and the printing mechanisms 2 are simultaneously transmitted, so that each rotating mechanism 1 corresponds to one printing mechanism 2; the printing speed is accelerated, the technical problem that the printing speed of the existing printing equipment for the printing medium 5 is too slow is solved, and the technical effect of quick printing is obtained; in other embodiments, each row of nozzles 231 may be connected to a single ink bottle, so that each row of nozzles 231 prints a single color. When two printing mechanisms 2 are arranged, the nozzle 23 of each printing mechanism 2 is connected with two ink bottles, so that the nozzle 23 can spray mixed color of two mixed colors; or the nozzle 23 of each printing mechanism 2 is communicated with one ink bottle, so that the printing pattern mixed by two colors is finally obtained; preferably, 4 printing mechanisms 2 are arranged, the nozzle 23 of each printing mechanism 2 is correspondingly communicated with one ink bottle, so that each printing mechanism 2 can spray different single colors on the printing medium 5, a mixed color is formed at last, and the printing mechanisms 2 can print different printing media simultaneously, thereby accelerating the number of printing completed in unit time.

Preferably, the printing mechanism 2 includes at least one row of nozzles 231 (see fig. 5), the row of nozzles 231 is parallel to the axial direction of the printing medium 5, the relative positions of the nozzles 231 and the printing medium 5 in the axial direction are adjustable, and each row of nozzles 231 ejects ink in the circumferential direction of the printing medium 5 independently of each other.

In this embodiment, each row of nozzles 231 operates independently, so the controller can control the number of rows of ink ejected from the head 23 according to the diameter of the print medium 5, input the diameter of the print medium 5 into the controller system, and calculate the number of rows of nozzles 231 that need to be opened; when the diameter of the printing medium 5 is small (generally, the printing medium with the diameter size smaller than 8 mm is called as a small-size printing medium), as shown in fig. 5, the controller controls the nozzles 231 of the row of printing mechanisms 2 closest to the closest printing medium 5 to jet ink to the printing medium 5, and if the size of the printing medium 5 is large, as shown in fig. 6, the nozzles 231 within a range from the surface of the printing medium 5 are controlled to spray the printing medium 5, so that the spraying to the printing medium 5 is accelerated, the rotating speed of the printing medium 5 is prevented from being large, and the ink sprayed by the nozzles 231 is less, and cannot cover the circumferential direction of the printing medium 5; in other embodiments, a distance measuring mechanism may be correspondingly disposed at each row of the nozzles 23, the distance measuring mechanism detects a distance S from a certain row of the nozzles 231 to the surface of the printing medium 5, and if S is within a preset range, preferably, S is greater than or equal to 1mm and less than or equal to 2mm, the corresponding row of the nozzles 231 is opened for inkjet printing; the distance S from the nozzle 231 to the surface of the printing medium 5 is the fall of the nozzle 231, an excessively high fall can cause ink droplets to scatter and affect the printing effect, and an excessively low fall causes the ink droplets to impact the surface of the printing medium 5 and splash, so that the fall is in a certain range, the ink droplets just fall on the surface of the printing medium 5 and do not splash, and the printing effect is further ensured; in this way, the corresponding nozzle 231 is specifically opened according to the diameter of the printing medium 5 to print on the printing medium 5. Specifically, the ink tubes to which each row of nozzles 231 is connected are provided with switching valves, and the respective switching valves are opened according to the specific size of the printing medium 5.

Because each row of nozzles 231 operates independently, the corresponding row number of nozzles 231 can be opened according to the diameter of the printing medium 5 to print the printing medium 5, if the diameter of the printing medium 5 is smaller, the row of nozzles 231 closest to the surface of the printing medium 5 is opened to perform inkjet printing on the printing medium 5, so that ink sprayed by the nozzles can better act on the printing medium 5, and the distance between the rows of nozzles does not need to be considered to cause that some rows of nozzles 231 do not print the printing medium, or the nozzles are too far away from the surface of the printing medium, so that ink drops splash to cause poor printing effect; thus enabling the printing mechanism 2 to perform ink jet printing on a printing medium 5 with a small size or a small diameter of a printing area required; the technical problem of poor printing effect when the existing printing equipment prints the printing medium 5 with smaller diameter is solved. In addition, when the size of the printing medium 5 is large, the nozzle 231 corresponding to the row from the specified distance on the surface of the printing medium 5 is opened to perform ink jet printing on the printing medium 5, so that the printing precision of the printing medium 5 can be improved, the requirement that the printing equipment can perform ink jet printing on the printing medium 5 with a small size can be met, and meanwhile, the printing size can be printed quickly and accurately.

In this embodiment, set up more than two printing mechanism 2, handle print medium 5 step by step respectively, and the mode of drive print medium 5 is the mode transmission of circular motion, consequently can set up all printing mechanism 2 with the mode of circumference array, and then make the structure of whole equipment compacter, make the area of whole equipment less, solved current printing apparatus and had the great technical problem of occupation of land space, it is less to have occupation of land space, compact structure's technical advantage.

Preferably, the printing mechanisms 2 are provided in at least four; each of the printing mechanisms 2 is for ejecting liquid different in material from each other on the printing medium 5.

In this embodiment, four printing mechanisms 2 are arranged, and four printing mechanisms 2 are uniformly arranged corresponding to the circumferential side wall of the rotating mechanism 3, so that the mechanism of the whole equipment is more compact, one printing mechanism 2 is arranged at every 90 degrees, and when the rotating device rotates for every 90 degrees, the rotating mechanism 3 rotates for a circle corresponding to one printing mechanism 2, and once printing can be completed; still be provided with material loading station and unloading station on slewing mechanism 3, material loading station and unloading station can set up in same department, and after print media 5 printed, take off print media 5, install next print media 5 of treating simultaneously, easy operation, slewing mechanism 3 circulation of being convenient for. In other embodiments, the rotating mechanism 3 may also be set to a conveying manner of a conveyor belt, and at this time, the feeding station and the discharging station are respectively located at two ends of the conveyor belt in the conveying direction; the rotating mechanisms 1 are arranged on the conveyor belt at intervals, and a space for the rotating mechanisms 1 to pass is arranged below the conveyor belt so that the rotating mechanisms 1 can return to the initial position; red (M), yellow (Y), cyan (C) and black (K) ink are respectively filled in the four printing mechanisms 2, the rotating mechanism 3 drives the printing medium 5 to sequentially pass through the lower parts of the four printing mechanisms 2, the surface of the printing medium 5 is respectively printed, after the rotating mechanism 3 rotates for a circle, the four colors are printed, and finally, a colorful printing image is formed on the surface of the printing medium 5; the liquids with different materials can be different in color or materials; the printing path may be a sequential printing or a repeated printing in the same printing mechanism 2 according to the printing requirement.

Preferably, as shown in fig. 1, the number of the rotating mechanisms 1 is the same as the number of the printing mechanisms 2, and each rotating mechanism 1 is provided corresponding to one printing mechanism 2.

In the embodiment, four rotating mechanisms 1 are arranged, and each rotating mechanism 1 is uniformly distributed in the circumferential direction of the rotating mechanism 3, so that the rotating mechanism 3 rotates by 90 degrees every time, and each rotating mechanism 1 corresponds to one printing mechanism 2; in other embodiments, the number of the rotating mechanisms 1 corresponds to the number of the printing mechanisms 2, and if the number of the printing mechanisms 2 is set to 3, three corresponding rotating mechanisms 1 are provided.

Preferably, the turning mechanism 3 includes: a drive motor 31 and a turntable 32; the turntable 32 is connected with the rotating mechanism 1, the turntable 32 is in transmission connection with the output end of the driving motor 31, and the driving motor 31 drives the turntable 32 to drive the rotating mechanism 1 to move towards or away from the printing mechanism 2.

In the embodiment, the fixing mechanism 33 is fixedly arranged below the turntable 32, the turntable 32 is arranged in a square plate-shaped structure, the four rotating mechanisms 1 are correspondingly arranged in the middle of the side length of the turntable 32, and when the printing medium 5 is positioned below the printing mechanism 2, the curing device is correspondingly positioned above the four top corners of the turntable 32; the rotating mechanism 3 further includes a divider for controlling the driving motor 31 to stop and an encoder for detecting a rotation angle signal of the turntable 32 and feeding back the angle signal to the controller.

Preferably, the printing apparatus further includes: and a curing mechanism 4 for curing the liquid ejected on the printing medium 5 by the printing mechanism 2.

In the present embodiment, the curing mechanism 4 includes a curing rack 41 and a curing lamp 42, the printing apparatus further includes a fixing mechanism 33, the fixing mechanism 33 is disposed below the rotating mechanism 3, the fixing mechanism 33 is used for installing the curing mechanism 4, specifically, the curing rack 41 is installed on the fixing mechanism 33, and the curing lamp 42 is installed on the curing rack 41, so that a space through which the printing medium 5 can rotate is formed between the curing lamp 42 and the fixing mechanism 33; the curing lamp 42 of the curing mechanism 4 is set as a UV lamp for curing, and the light direction of the UV lamp 42 is downward irradiated in the printing medium 5; in the process of transmission, the rotating mechanism 3 is arranged below the curing mechanism 4, so that the rotating mechanism 3 is used for curing the printing medium 5 in the process of conveying the printing medium, the curing mechanism 4 is used for preventing the printing effect from being influenced by gravity dripping of the ink in the transmission process, the distance between the curing mechanism 4 and the printing mechanism 2 is smaller than 150 cm, the printing mechanism 2 can be timely transmitted to the position below the curing mechanism 4 after printing is finished, and the ink on the printing medium 5 is cured.

Preferably, the number of curing mechanisms 4 corresponds to the number of printing mechanisms 2, and each curing mechanism 4 is located between two adjacent printing mechanisms 2.

In the present embodiment, when the rotating mechanism 3 is the carousel 32 type transport, the curing mechanism 4 is disposed empty between two adjacent printing mechanisms 2; the side of every printing mechanism 2 all corresponds and sets up a solidification mechanism 4, and solidification mechanism 4 solidifies the ink that forms on the surface of print media 5, avoids the ink at the in-process that moves to next printing mechanism 2 below, because the gravity of self drips or is thrown away by the rotation centrifugal force of print media 5. In addition, the curing power of all the curing mechanisms 4 is the same, and the curing mechanisms 4 respectively cure the image information printed by the printing mechanism 2 each time; as mentioned above, the layer-like image is printed step by step, each curing mechanism 4 forms a layer-like structure with a first refractive index after curing a corresponding printed image, and since the printed materials of each layer are different, the refractive indexes of the layer-like structures formed after curing are different, and after curing, all the layer-like structures with different refractive indexes are stacked together to form the printed image with the matte effect.

The curing power of the curing mechanism 4 increases in sequence along the transport direction of the printing medium 5. The transmission direction is according to the number of times of printing, namely the Nth printing of the first printing, the second printing and the third printing … …; the preferred embodiment is provided with a plurality of printing mechanisms 2, namely a first printing mechanism, a second printing mechanism, a third printing mechanism and a fourth printing mechanism, and the curing mechanism 4 is corresponding to: the first curing mechanism, the second curing mechanism, the third curing mechanism and the fourth curing mechanism adopt low-power curing lamps 42 to irradiate the printing ink in the previous three times of printing, and can also be set to be the same low-power curing power; the ink in the previous times is in the state of primary solidification, so that the ink cannot be separated from the printing medium 5 by the rotation of the printing medium 5, and the phenomenon that the next ink is inconvenient to mix with the previous ink due to the fact that the ink is too dry is avoided; at the time of the last printing, which is the fourth printing mechanism in this embodiment, the curing lamp 42 with the largest power is used to perform the final curing on the ink, so that the ink forms a stable and dry pattern on the surface of the printing medium 5.

Preferably, the printing apparatus further includes: a fixing mechanism 33; the fixing mechanism 33 is connected with the curing mechanism 4, the rotating mechanism 3 and the fixing mechanism 33 are arranged coaxially, and the curing mechanism 4 is arranged corresponding to the rotating mechanism 1.

In the embodiment, specifically, the turntable 32 and the fixing mechanism 33 are arranged concentrically, the fixing mechanism 33 is located below the turntable 32, and the fixing mechanism 33 is arranged on the driving motor 31 in a penetrating manner and is relatively fixedly connected with the driving motor 31; the turntable 32 can rotate relative to the fixing mechanism 33; that is, the turntable 32 is rotated above the fixing mechanism 33, and the area of the turntable 32 is smaller than that of the fixing mechanism 33, the rotating mechanism 1 is disposed in the circumferential direction of the turntable 32, and the turntable 32 is rotated so that the rotating mechanism 1 rotates and passes below the curing mechanism 4. In other embodiments, the fixing mechanism 33 may be located on the same plane as the turntable 32, and the curing mechanism 4 may be located lower than the rotating mechanism 1 or higher than the rotating mechanism 1.

Preferably, the printing mechanism 2 comprises: a cross beam 21, a printing trolley; the printing trolley is connected with the cross beam 21 in a relative sliding mode, and the sliding direction of the printing trolley is consistent with the axial direction of the rotating shaft.

In this embodiment, the printing cart includes a mounting seat 22 and a nozzle 23, the arrangement direction of the nozzles 231 is parallel to the central axis of the printing medium 5 and is arranged in rows, a guide rail is disposed on the cross beam 21, the nozzle 23 is formed by multiple rows of nozzles 231 which are independent of each other, the nozzle 23 is mounted on the mounting seat 22, the mounting seat 22 slides along the guide rail, the mounting seat 22 is driven by a driving method of the linear driving motor 31 to move along the guiding direction of the guide rail, so that the nozzle 23 can be slidably disposed on the cross beam 21 along the guiding direction of the guide rail, the guiding direction of the guide rail is parallel to the central axis of the printing medium 5, the nozzle 23 moves along the guiding direction of the guide rail to adjust the relative position of the nozzle 231 and the axial direction of the printing medium 5, so that the ink ejected from the nozzle 231 covers the longitudinal direction of the printing medium 5, the rotating mechanism 1 drives the printing medium 5 to rotate, so that the ink ejected from the nozzle 23 covers the circumferential direction of the printing medium 5, therefore, the ink printed by the print head 23 covers the entire circumferential side surface of the printing medium 5.

Preferably, the printing mechanism 2 further comprises: the lifting component is connected with the printing trolley and drives the printing trolley to lift.

In the present embodiment, the distance from the nozzle 231 to the printing medium 5 is adjustable. Specifically, be provided with vertical adjustment mechanism 24 between mount pad 22 and the slide rail, vertical adjustment mechanism 24 adjusts the relative position of mount pad 22 on vertical direction, vertical adjustment mechanism 24 adopts linear electric motor's drive mode to drive mount pad 22 reciprocating motion on vertical direction, and then adjusts the distance on nozzle 231 to print media 5 surface, can adjust the distance on nozzle 231 to print media 5's surface according to print media 5's size, make nozzle 231 to print media 5 surface distance at an appropriate within range, make the ink droplet can be better print media 5, and then make print mechanism 2 can adapt the print media 5 of different sizes more.

The second embodiment of the present invention is different from the first embodiment in that: the solid curing mechanism 4 is connected with the printing mechanism, specifically, as shown in fig. 4, the printing mechanism 2 further includes a mounting seat 22, the mounting seat 22 is slidably disposed on the slide rail, the nozzle 23 is mounted on the mounting seat 22, and the nozzle 23 is located above the printing medium 5; specifically, the curing mechanism 4 is arranged on the mounting seat 22, the curing mechanism 4 is positioned beside the printing nozzle 23, and the curing mechanism 4 and the nozzle 23 move together along the guide direction of the guide rail; the curing mechanism 4 moves together with the nozzle 23, the light source of the UV lamp directly irradiates the circumferential direction of the printing medium 5, and in the process of jetting ink to the printing medium 5 by the nozzle 231, the curing device cures the ink jetted from the nozzle 231 to cure the jetted ink, so that a stronger adhesive force is formed between the ink and the surface of the printing medium 5.

The third embodiment of the present invention is different from the first embodiment in that: the printing mechanism 2 includes at least: a first printing mechanism, a second printing mechanism and a third printing mechanism; the first printing mechanism is used for preprocessing a printing medium; the second printing mechanism is used for jetting ink to the printing medium; the third printing structure is used for spraying varnish on the printing medium.

In the present embodiment, the printing mechanisms 2 are provided in three; the first printing mechanism sprays plasma treatment liquid on the surface of the printing medium to form an adhesion layer on the surface of the printing medium, so that ink can be conveniently adhered to the surface of the printing medium; the second printing mechanism performs ink jet on the surface formed by the adhesion layer to form a pattern layer, wherein the ink jet comprises but is not limited to white ink or color ink; the third printing mechanism is used for spraying gloss oil on the pattern layer to form a gloss oil layer so as to carry out processes such as gold stamping and the like on the pattern layer; in the in-service use process, can add printing mechanism 2 according to the technology demand, all printing mechanism 2 equipartitions are in transmission device's transmission direction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A printing apparatus for printing circumferentially, the apparatus comprising:

the rotating mechanism is used for driving the printing medium to rotate around the axis of the rotating mechanism;

a printing mechanism for ejecting liquid on a printing medium;

the output end of the rotating mechanism is in transmission connection with the rotating mechanism, and the rotating mechanism drives the rotating mechanism to move towards or away from the printing mechanism in a circular motion mode;

the printing mechanism comprises at least two printing mechanisms, each printing mechanism is used for printing partial image data of an image to be printed, the rotating mechanism drives the rotating mechanism to move to the position of each printing mechanism for printing, and then the rotating mechanism moves to the position of the next printing mechanism for printing until the printing image is generated on the surface of a printing medium.

2. The printing apparatus for circumferential printing according to claim 1, wherein the printing mechanisms are provided in at least four; each of the printing mechanisms is used for ejecting liquid with different materials on a printing medium.

3. Printing apparatus for circumferential printing according to claim 1, wherein said printing mechanism comprises at least: a first printing mechanism, a second printing mechanism and a third printing mechanism; the first printing mechanism is used for preprocessing a printing medium; the second printing mechanism is used for jetting ink to a printing medium; the third printing structure is used for spraying varnish on a printing medium.

4. A printing apparatus for circumferential printing according to any of claims 1-3, wherein the number of said rotating mechanisms is the same as the number of said printing mechanisms, and each of said rotating mechanisms is provided for one of said printing mechanisms.

5. Printing apparatus for circumferential printing according to any of claims 1-3, wherein the rotating mechanism comprises: a drive motor and a turntable; the turntable is connected with the rotating mechanism in a forming mode, the turntable is in transmission connection with the output end of the driving motor, and the driving motor drives the turntable to drive the rotating mechanism to move towards or away from the printing mechanism.

6. A printing apparatus for circumferential printing according to any of claims 1-3, wherein the apparatus further comprises: and the curing mechanism is used for curing the liquid sprayed on the printing medium by the printing mechanism.

7. A printing apparatus for circumferential printing according to claim 6, wherein the number of said curing mechanisms is the same as the number of said printing mechanisms, each said curing mechanism being located between two adjacent said printing mechanisms.

8. The circumferentially printed printing apparatus of claim 6, further comprising: a fixing mechanism; the fixing mechanism is connected with the curing mechanism, the rotating mechanism and the fixing mechanism are arranged on the same central shaft, and the curing mechanism is arranged corresponding to the rotating mechanism.

9. Printing apparatus for circumferential printing according to claim 1, wherein the printing mechanism comprises: a cross beam and a printing trolley; the printing trolley is connected with the cross beam in a relative sliding mode, and the sliding direction of the printing trolley is consistent with the axis direction of the rotating shaft.

10. The circumferentially printed printing apparatus of claim 9, wherein the printing mechanism further comprises: the lifting component is connected with the printing trolley and drives the printing trolley to lift.

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