Printing machine and printing method

Abstract

To provide a printing machine that can efficiently perform printing.SOLUTION: A printing machine 110 is provided with: a first top surface printing part 210 that prints a top surface of a work-piece arranged on a first arrangement part on a first rotating member; a first top surface drying part 220 that dries ink on the top surface of the work-piece printed by the first top surface printing part 210; a second top surface printing part 240 that prints a memory, a character, a number or a sign, with ink of a color different from a color of the ink, on the top surface of the work-piece whose ink is dried by the first top surface drying part 220; a second top surface drying part 250 that dries the ink on the top surface of the work-piece printed by the second top surface printing part 240; a first photographing part 260 that photographs the printed work-piece; and a first control part 270 that comprises a first storage part that stores data including an image of the printed work-piece and a first determination part that determines whether a printed state of the work-piece photographed by the first photographing part is acceptable or not.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a printing machine and a printing method. [Background technology]

[0002] Conventionally, printing of pressure gauges used in small manifold regulators and the like has not been automated, and workers have had to print them manually (silkscreen printing).

[0003] Patent Document 1 discloses a printing device and a method for producing printed matter that can easily correct misalignment between a workpiece and a print pattern and that has good production efficiency for printed matter.

[0004] Specifically, a rotary table unit that sequentially moves the workpiece to first to third positions determined around the rotation axis of the rotary table; a workpiece placement unit that places a workpiece on the rotary table at a first position; a work position adjusting unit that can adjust the position of the work on the rotary table at a second position; a screen printing unit that performs screen printing on the workpiece at a third position; an observation means for observing a pattern printed on a workpiece; A printing device is disclosed that includes a control unit that compares the observed print pattern with a pre-stored reference pattern and operates a work position adjustment unit so as to reduce the deviation between the two patterns. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2011-56761 A Summary of the Invention [Problem to be solved by the invention]

[0006] With conventional pressure gauge printing, not only is the top surface printed in solid color, but the pressure gauge's scale is printed on the top surface after the solid printing (two-color printing on the top surface), and then the product is visually inspected.

[0007] However, in the past, each process was performed by individual workers, who performed screen printing and inspection by hand, which resulted in poor work efficiency.

[0008] Furthermore, when screen printing pressure gauges, the printing angle of the markings is also regulated by JIS standards, requiring high printing precision.

[0009] In particular, the pressure gauges used in small manifold regulators have very small printed areas, making it difficult to print accurately.

[0010] As a result, the number of prints per day was limited to around 2,000.

[0011] SUMMARY OF THE INVENTION A primary object of the present invention is to provide a printing press that prints efficiently.

[0012] Another object of the present invention is to efficiently screen print pressure gauges.

[0013] Another object of the present invention is to provide a printing method that allows for efficient printing. [Means for solving the problem]

[0014] A printing machine according to a first aspect of the present invention is a printing machine that prints on a workpiece having a top surface using UV ink, the printing machine including a first printing machine that prints on the top surface of the workpiece, The first printing machine includes a first rotating member that is a turntable for moving a workpiece, the first rotating member has a first placement portion equipped with a first workpiece jig for placing a workpiece; The first printing press is a first lift prevention sensor that detects lifting of a workpiece placed on the first workpiece jig; a first top surface printing unit that prints a top surface of a workpiece placed on the first workpiece jig of the first placement unit on the first rotating member; A first top surface drying unit that dries the ink on the top surface of the work printed by the first top surface printing unit; A second top surface printing unit that prints a memory, a letter, a number, or a symbol on the top surface of the workpiece on which the ink has been dried by the first top surface drying unit, using an ink of a different color from the ink; A second top surface drying unit that dries the ink on the top surface of the work printed by the second top surface printing unit; a first imaging unit that captures an image of the printed work; A first control unit including a first storage unit that stores data including an image of the work in a printed state, and a first determination unit that determines whether the print state of the work photographed by the first imaging unit is good or bad; a first discarding unit that discards the workpiece determined to be a defective product by the first determining unit; a first delivery unit to which the workpiece determined to be a non-defective product by the first determination unit is delivered; the first rotating member has a first placement portion for placing a workpiece; the first placement unit includes a first work placement sensor that detects that a work has been placed on the first work jig; The first top surface drying unit includes a first UV irradiation device that irradiates UV light onto the top surface of the workpiece printed with UV ink by the first top surface printing unit, The second top surface drying unit includes a second UV irradiation device that irradiates UV light onto the top surface of the workpiece printed with UV ink by the second top surface printing unit, The first determination unit is a printing machine that determines pass / fail by comparing an image of the work stored in the first storage unit with an image captured by the first imaging unit.

[0015] The turntable having the first placement section rotates, and the workpiece placed on the first placement section is printed, so that the top surface of the workpiece can be printed efficiently.

[0016] A printing machine according to a second aspect of the present invention is a printing machine that prints on a workpiece having a side surface using UV ink, and the printing machine includes a second printing machine that prints on the side surface of the workpiece, The second printing machine includes a second rotating member that is a rotating member for moving a workpiece, the second rotating member has a plurality of rod-shaped protrusions extending radially from a center thereof, and a second placement section provided with a second workpiece jig for placing a workpiece at the tip of the protrusions; The second printing press is a second side surface printing unit that prints a side surface of a workpiece placed on the second workpiece jig of the second placement unit provided on the second rotating member; a first side drying unit that dries the ink on the side of the work printed by the second side printing unit; A second side printing unit that prints a mark, a letter, a number, or a symbol on the side of the work on which the ink has been dried by the first side drying unit using an ink of a different color from the ink; a second side drying unit that dries the ink on the side of the work printed by the second side printing unit; a second imaging unit that captures an image of the printed workpiece; A second control unit including a second storage unit that stores data including an image of the work in a printed state, and a second judgment unit that judges whether the print state of the work photographed by the second imaging unit is good or bad; a second discarding unit that discards the workpiece determined to be a defective product by the second determining unit; a second delivery unit to which the workpiece determined to be a non-defective product by the second determination unit is delivered; The first side drying unit includes a third UV irradiation device that irradiates UV light onto the side of the workpiece printed with UV ink by the first side printing unit, The second side drying unit includes a fourth UV irradiation device that irradiates UV light onto the side of the workpiece printed with UV ink by the second side printing unit, The second determination unit is a printing machine that determines pass / fail by comparing an image of the work stored in the second storage unit with an image captured by the second imaging unit.

[0017] The second rotating member having the second placement section rotates, and the workpiece placed in the second placement section is printed, thereby making it possible to efficiently print the side surface of the workpiece.

[0018] A printing machine according to a third aspect of the present invention is a printing machine that prints on a workpiece having a top surface and a side surface using UV ink, and the printing machine includes a first printing machine that prints on the top surface of the workpiece and a second printing machine that prints on the side surface of the workpiece, The first printing machine includes a first rotating member that is a turntable for moving a workpiece, the first rotating member has a first placement portion equipped with a first workpiece jig for placing a workpiece; The first printing press is a first lift prevention sensor that detects lifting of a workpiece placed on the first workpiece jig; a first top surface printing unit that prints a top surface of a workpiece placed on the first workpiece jig of the first placement unit on the first rotating member; A first top surface drying unit that dries the ink on the top surface of the work printed by the first top surface printing unit; A second top surface printing unit that prints a memory, a letter, a number, or a symbol on the top surface of the workpiece on which the ink has been dried by the first top surface drying unit, using an ink of a different color from the ink; A second top surface drying unit that dries the ink on the top surface of the work printed by the second top surface printing unit; a first imaging unit that captures an image of the printed work; A first control unit including a first storage unit that stores data including an image of the work in a printed state, and a first determination unit that determines whether the print state of the work photographed by the first imaging unit is good or bad; a first discarding unit that discards the workpiece determined to be a defective product by the first determining unit; a first delivery unit to which the workpiece determined to be a non-defective product by the first determination unit is delivered; the first rotating member has a first placement portion for placing a workpiece; the first placement unit includes a first work placement sensor that detects that a work has been placed on the first work jig; The first top surface drying unit includes a first UV irradiation device that irradiates UV light onto the top surface of the workpiece printed with UV ink by the first top surface printing unit, The second top surface drying unit includes a second UV irradiation device that irradiates UV light onto the top surface of the workpiece printed with UV ink by the second top surface printing unit, The first determination unit compares the image of the workpiece stored in the first storage unit with the image captured by the first imaging unit to determine whether the workpiece is good or bad, The second printing machine includes a second rotating member that is a rotating member for moving a workpiece, the second rotating member has a plurality of rod-shaped protrusions extending radially from a center thereof, and a second placement section provided with a second workpiece jig for placing a workpiece at the tip of the protrusions; The second printing press is a second side surface printing unit that prints a side surface of a workpiece placed on the second workpiece jig of the second placement unit provided on the second rotating member; a first side drying unit that dries the ink on the side of the work printed by the second side printing unit; A second side printing unit that prints a mark, a letter, a number, or a symbol on the side of the work on which the ink has been dried by the first side drying unit using an ink of a different color from the ink; a second side drying unit that dries the ink on the side of the work printed by the second side printing unit; a second imaging unit that captures an image of the printed workpiece; A second control unit including a second storage unit that stores data including an image of the work in a printed state, and a second judgment unit that judges whether the print state of the work photographed by the second imaging unit is good or bad; a second discarding unit that discards the workpiece determined to be a defective product by the second determining unit; A second delivery unit to which the workpiece determined to be a non-defective product by the second determination unit is delivered, The first side drying unit includes a third UV irradiation device that irradiates UV light onto the side of the workpiece printed with UV ink by the first side printing unit, The second side drying unit includes a fourth UV irradiation device that irradiates UV light onto the side of the workpiece printed with UV ink by the second side printing unit, The second determination unit is a printing machine that determines pass / fail by comparing an image of the work stored in the second storage unit with an image captured by the second imaging unit.

[0019] A turntable having a first placement section rotates, the workpiece placed in the first placement section is printed, and a second rotating member having a second placement section rotates, the workpiece placed in the second placement section is printed, thereby enabling efficient printing of the top and sides of the workpiece.

[0020] A printing method according to a fourth aspect of the present invention is a printing method of a printing machine that prints on a workpiece having a top surface using UV ink, the printing machine including a first printing machine that prints on the top surface of the workpiece, The first printing machine includes a first rotating member that is a turntable for moving a workpiece, the first rotating member has a first placement portion equipped with a first workpiece jig for placing a workpiece; The printing process by the first printing machine is a detection step using a first lift prevention sensor to detect lifting of the workpiece placed on the first workpiece jig; a first top surface printing process for printing a top surface of a workpiece placed on the first workpiece jig in the first placement section; a first top surface drying process for drying the ink on the top surface of the workpiece printed in the first top surface printing process; A second top surface printing process of printing a memory, a letter, a number, or a symbol with an ink of a different color from the ink on the top surface of the workpiece after the ink has dried in the first top surface drying process; A second top surface drying process for drying the ink on the top surface of the work printed in the second top surface printing process; a first imaging step of imaging the printed workpiece; a first storage step of storing data including an image of the workpiece in a printed state; a first determination step of determining whether the print state of the work photographed by the first imaging step is good or bad; a first discarding step in which the workpiece determined to be a defective product by the first determining step is discarded; a first delivery process in which the workpiece determined to be a non-defective product by the first determination process is delivered; The first top surface drying step includes a first UV irradiation step of irradiating UV light onto the top surface of the workpiece printed with UV ink in the first top surface printing step, The second top surface drying process includes a second UV irradiation process of irradiating UV light onto the top surface of the workpiece printed with UV ink in the second top surface printing process, In the first determination step, the image of the work stored in the first storage step is compared with the image captured in the first imaging step to determine whether the work is good or bad.

[0021] Such a printing method provides the same effects as the printing machine according to the first aspect.

[0022] A printing method according to a fifth aspect of the present invention is a printing method of a printing machine that prints on a workpiece having a side surface using UV ink, the printing machine including a second printing machine that prints on the side surface of the workpiece, The second printing machine includes a second rotating member that is a rotating member for moving a workpiece, the second rotating member has a plurality of rod-shaped protrusions extending radially from a center thereof, and a second placement section provided with a second workpiece jig for placing a workpiece at the tip of the protrusions; The printing process by the second printing machine is A second side surface printing process of printing a side surface of a workpiece placed on the second workpiece jig in the second placement section; a first side drying step for drying the ink on the side of the work printed in the second side printing step; A second side printing process of printing a mark, a letter, a number, or a symbol with an ink of a different color from the ink on the side of the work on which the ink has dried in the first side drying process; a second side drying step of drying the ink on the side of the work printed in the second side printing step; a second imaging step of imaging the printed workpiece; a second storage step of storing data including an image of the workpiece in a printed state; A second determination step of determining whether the print state of the work photographed in the second imaging step is good or bad; a second discarding step in which the workpiece determined to be a defective product in the second determining step is discarded; a second delivery process in which the workpiece determined to be a non-defective product in the second determination process is delivered; The first side drying step includes a third UV irradiation step of irradiating UV light onto the side of the workpiece printed with UV ink in the first side printing step, The second side drying step includes a fourth UV irradiation step of irradiating UV light onto the side of the workpiece printed with UV ink in the second side printing step, In the second judgment step, the image of the work stored in the second storage step is compared with the image captured in the second imaging step to judge whether the work is good or bad.

[0023] Such a printing method provides the same effects as the printing machine according to the second aspect.

[0024] A printing method according to a sixth aspect of the present invention is a printing method of a printing machine that prints on a workpiece having a top surface and a side surface using UV ink, the printing machine including a first printing machine that prints on the top surface of the workpiece and a second printing machine that prints on the side surface of the workpiece, The first printing machine includes a first rotating member that is a turntable for moving a workpiece, the first rotating member has a first placement portion equipped with a first workpiece jig for placing a workpiece; The printing process by the first printing machine is a detection step using a first lift prevention sensor to detect lifting of the workpiece placed on the first workpiece jig; a first top surface printing process for printing a top surface of a workpiece placed on the first workpiece jig in the first placement section; a first top surface drying process for drying the ink on the top surface of the workpiece printed in the first top surface printing process; A second top surface printing process of printing a memory, a letter, a number, or a symbol with an ink of a different color from the ink on the top surface of the workpiece after the ink has dried in the first top surface drying process; A second top surface drying process for drying the ink on the top surface of the work printed in the second top surface printing process; a first imaging step of imaging the printed workpiece; a first storage step of storing data including an image of the workpiece in a printed state; a first determination step of determining whether the print state of the work photographed by the first imaging step is good or bad; a first discarding step in which the workpiece determined to be a defective product by the first determining step is discarded; a first delivery process in which the workpiece determined to be a non-defective product by the first determination process is delivered; The first top surface drying step includes a first UV irradiation step of irradiating UV light onto the top surface of the workpiece printed with UV ink in the first top surface printing step, The second top surface drying process includes a second UV irradiation process of irradiating UV light onto the top surface of the workpiece printed with UV ink in the second top surface printing process, In the first determination step, the image of the workpiece stored in the first storage step is compared with the image captured in the first imaging step to determine whether the workpiece is good or bad; The second printing machine includes a second rotating member that is a rotating member for moving a workpiece, the second rotating member has a plurality of rod-shaped protrusions extending radially from a center thereof, and a second placement section provided with a second workpiece jig for placing a workpiece at the tip of the protrusions; The printing process by the second printing machine is A second side surface printing process of printing a side surface of a workpiece placed on the second workpiece jig in the second placement section; a first side drying step for drying the ink on the side of the work printed in the second side printing step; A second side printing process of printing a mark, a letter, a number, or a symbol with an ink of a different color from the ink on the side of the work on which the ink has dried in the first side drying process; a second side drying step of drying the ink on the side of the work printed in the second side printing step; a second imaging step of imaging the printed workpiece; a second storage step of storing data including an image of the workpiece in a printed state; A second determination step of determining whether the print state of the work photographed in the second imaging step is good or bad; a second discarding step in which the workpiece determined to be a defective product in the second determining step is discarded; a second delivery process in which the workpiece determined to be a non-defective product in the second determination process is delivered; The first side drying unit includes a third UV irradiation device that irradiates UV light onto the workpiece printed with UV ink by the first side printing unit, The second side drying unit includes a fourth UV irradiation device that irradiates UV light onto the workpiece printed with UV ink by the second side printing unit, In the second judgment step, the image of the work stored in the second storage step is compared with the image captured in the second imaging step to judge whether the work is good or bad.

[0025] Such a printing method provides the same effects as the printing machine according to the third aspect. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a schematic plan view of a printing press according to an embodiment of the present invention; [Figure 2] FIG. 2 is a partial perspective view of the printing press according to the embodiment. [Figure 3] FIG. 2 is a partial perspective view of the printing press according to the embodiment. [Figure 4] FIG. 2 is a partial perspective view of the printing press according to the embodiment. [Figure 5] FIG. 2 is a conceptual diagram of a printing press according to the embodiment. [Figure 6] FIG. 2 is a conceptual diagram of a printing press according to the embodiment. [Figure 7] FIG. 2 is a schematic plan view of the printing press according to the embodiment. [Figure 8] FIG. 2 is a conceptual diagram of a printing press according to the embodiment. [Figure 9] FIG. 2 is a conceptual diagram of a printing press according to the embodiment. [Figure 10] 1 is a schematic plan view of a printing press according to an embodiment of the present invention; [Figure 11] FIG. 2 is a partial perspective view of the printing press according to the embodiment. [Figure 12] FIG. 2 is a conceptual diagram of a printing press according to the embodiment. [Figure 13] FIG. 2 is a schematic plan view of the printing press according to the embodiment. [Figure 14] FIG. 2 is a conceptual diagram of a printing press according to the embodiment. [Figure 15] 10 is a flowchart of a printing method according to the embodiment. [Figure 16] 10 is a flowchart of a printing method according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0027] An example of the present invention will now be described with reference to the drawings.

[0028] First Embodiment The printing press 100 according to this embodiment includes a first printing press 110 and a second printing press. The printing press 100 according to this embodiment is capable of printing 4,000 or more workpieces A per day, enabling efficient printing.

[0029] The first printing machine 110 prints the top surface of the work A, and the second printing machine 120 prints the side surface of the work A.

[0030] <1st printing press 110> As shown in FIGS. 1 to 6, the first printing press 110, which is the printing press 100 according to this embodiment, has a first rotating member 200, which is a turntable for moving the work A. a first top surface printing unit 220 that prints the top surface of the work A placed on the first placement unit 210 on the first rotating member 200; a first top surface drying unit 230 that dries the ink on the top surface of the work A printed by the first top surface printing unit 220; a second top surface printing unit 240 that prints marks, letters, numbers, symbols, etc. on the top surface of the work A after the ink has been dried by the first top surface drying unit 230; a second top surface drying unit 250 that dries the ink on the top surface of the work A printed by the second top surface printing unit 240; a first imaging unit 260 that captures an image of the printed work A; a first control unit 270 that determines whether the print state of the work A photographed by the first imaging unit 260 is good or bad; a first disposal unit 280 in which the work A determined to be a defective product by the first control unit 270 is disposed of; and a first delivery section 290 to which the work A determined to be a non-defective product by the first control section 270 is delivered.

[0031] The first printing machine 110 is surrounded by a transparent cover, which prevents dust and other foreign matter from entering when work A is being printed.

[0032] The workpiece A according to this embodiment is a cover case for a pressure gauge having a top surface and side surfaces that are generally circular in plan view.

[0033] The first rotating member 200 has a circular shape in a plan view, rotates clockwise around the center of the circle as an axis, and has a plurality of first placement portions 210 on which the workpiece A is placed.

[0034] In this embodiment, the first arrangement portions 210 are provided at ten locations on the first rotating member 200 (first arrangement portions 210a to 210j).

[0035] The first placement section 210 includes a first workpiece jig 211 for fitting the workpiece A, Squeegee guides 212 are provided at both ends of the first work jig 211 (both ends in the radial direction of the first rotating member 200), and a first workpiece placement sensor 213 that detects that workpiece A has been placed on the first workpiece jig 211.

[0036] The first workpiece jig 211 is provided with a positioning unit (not shown) that performs positioning when the workpiece A is placed.

[0037] The first workpiece jig 211 has a positioning portion (not shown) for positioning the workpiece A.

[0038] The workpiece A has a depression or a protrusion for performing alignment corresponding to the alignment portion (not shown). In this embodiment, the workpiece A has a depression for performing alignment.

[0039] Specifically, a positioning pin is used in the positioning portion (not shown), and a notch (not shown) into which the positioning pin can be fitted is provided in the work A. The shape of the work A may be any shape.

[0040] The squeegee guide 212 guides a first squeegee 223, which will be described later.

[0041] A first workpiece placement sensor 213 is disposed in the first placement section 210, and the first workpiece placement sensor 213 detects whether or not the workpiece A is placed on the first workpiece jig 211.

[0042] When the first workpiece placement sensor 213 detects that the workpiece A has been placed on the first workpiece jig 211, the first control unit 270 is notified of this information.

[0043] A first lift prevention sensor 215 that prevents work A from lifting up is placed between the point where the worker places work A on the first work jig 211 of the first placement section 210 and the point where the first top surface printing section 220 is placed.

[0044] When the workpiece A fitted in the first workpiece jig 211 is floating above the first workpiece jig 211, the first floating prevention sensor 215 detects the workpiece A when the first rotating member 200 rotates.

[0045] In this embodiment, a contact sensor is used as the first lift-up prevention sensor 215, and when the workpiece A comes into contact with the first lift-up prevention sensor 215, the first lift-up prevention sensor 215 detects the workpiece A.

[0046] When the first lift-up prevention sensor 215 detects the workpiece A, the information is notified to the first control unit 270, and the first control unit 270 issues an error notification and stops the rotation of the first rotating member 200.

[0047] The first top surface printing unit 220 performs solid printing on the circular top surface of the work A. Specifically, the first top surface printing unit 220 performs silk screen printing. Note that the first top surface printing unit 220 may be capable of pad printing (pad printing, tampon printing) and inkjet printing in addition to screen printing.

[0048] The first top surface printing unit 220 includes a first screen plate 221 that is placed on the first placement unit 210 that has been moved by the rotation of the first rotating member 200; a first filling section 222 that fills ink onto the first screen plate 221; a first squeegee 223 and a first doctor 224 for applying ink to the top surface of the work A from above the first screen 221; The first drive unit 225 drives the first squeegee 223 and the first doctor 224 up and down and left and right.

[0049] The workpiece A in the first placement section 210 placed below the first screen plate 221 is coated with ink together with the first screen plate 221 by the first squeegee 223 .

[0050] In this embodiment, the first screen 221 is a screen that can print the top surface of the work A in solid form.

[0051] The first filling unit 222 fills the first screen plate 221 with ink before the first squeegee 223 and the first doctor blade 224 are driven.

[0052] The first squeegee 223 applies ink to the top surface of the workpiece A.

[0053] The first doctor 224 is where so-called ink return takes place.

[0054] The first driving section 225 drives the first squeegee 223 and the first doctor 224 independently up and down.

[0055] Furthermore, the first driving section 225 can simultaneously drive the first squeegee 223 and the first doctor 224, which are a unit, up and down and left and right.

[0056] The first control unit 270 controls the first drive unit 245, thereby controlling the up / down and left / right movement of the entire first top surface printing unit 220.

[0057] The first drive unit 225 can be manually moved.

[0058] That is, the operator can manually drive the first squeegee 223 and the first doctor blade 224 to make fine adjustments without using the first control unit 270.

[0059] When the first placement unit 210 is positioned below the first screen plate 221 (when the work A is positioned below the first screen plate 221), the first drive unit 245 moves the first squeegee 223 and the first doctor 224 up, down, left and right, and the first top surface printing unit 220 uses the first squeegee 223 and the first doctor 224 to print (solid print) the top surface of the work A together with the first screen plate 221.

[0060] When the first squeegee 223 is lowered and movable, the first doctor 224 is raised, and when the first doctor 224 is lowered and movable, the first squeegee 223 is raised.

[0061] In this embodiment, printing is performed on the top surface of the workpiece A when the first top surface printing unit 220 moves in the rotation direction (travel direction) of the first rotating member 200, that is, when the first squeegee 223 descends and moves in the travel direction.

[0062] The first top surface drying unit 230 dries the top surface of the work A that has been printed by the first top surface printing unit 220.

[0063] The first top surface drying section 230 has a first hot air control section 231 and a first hot air nozzle 232, and the first hot air control section 231 can set the temperature and air volume.

[0064] In this embodiment, hot air is blown from the first hot air nozzle 232 of the first top surface drying unit 230 onto the workpiece A printed by the first top surface printing unit 220 to dry it.

[0065] In this embodiment, the first hot air nozzles 232 are provided in two locations, and hot air is blown from different directions onto the top surface of the workpiece A to dry it. The first hot air nozzles 232 may be provided in one location, or in three or more locations.

[0066] In addition, the top surface of work A may be dried from directly above.

[0067] Alternatively, the first hot air control section 231 and the first control section 270 may be included in each other.

[0068] That is, the first control unit 270 may control the first top surface drying unit 230.

[0069] The second top surface printing unit 240 performs further printing (screen printing) on ​​the top surface of the work A that has been solid printed by the first top surface printing unit 220.

[0070] In this embodiment, the top surface of the work A that has been solid printed by the first top surface printing unit 220 is printed with symbols, numbers, symbols, logos, etc. in a color different from the color used by the first top surface printing unit 220.

[0071] The configuration of the second top surface printing unit 240 is the same as the configuration of the first top surface printing unit 220, and therefore a description thereof will be omitted. Note that the second top surface printing unit 240 may be capable of pad printing (pad printing, tampo printing) and ink jet printing in addition to screen printing.

[0072] The second top surface drying section 250 is a section where the top surface of the work A on which memory marks and the like have been printed by the second top surface printing section 240 is dried.

[0073] The configuration of the second top surface drying section 250 is the same as that of the first top surface drying section 230, and therefore a description thereof will be omitted.

[0074] The second top surface drying section 250, like the first top surface drying section 230, has a second hot air control section 251 and a second hot air nozzle 252, and the second hot air control section 251 can set the temperature and air volume.

[0075] In this embodiment, the second hot air nozzles 252 are provided in two locations, and hot air is blown onto the top surface of the workpiece A from different directions to dry it.

[0076] The first hot air control section 231 and the second hot air control section 251 may be the same.

[0077] Similarly to the first hot air control section 231, the second hot air control section 251 may be included in the first control section 270.

[0078] The first imaging unit 260 is where an image of the printed work A is taken.

[0079] In this embodiment, the image of work A captured by the first imaging unit 260 is compared with an image of work A previously stored in the first control unit 270, and the first control unit 270 determines whether the work is a good product or not by comparing the images.

[0080] The first control unit 270 includes a first rotating member control unit 271 that controls the driving of the first rotating member 200, a top surface printing control unit 272 that controls the driving of the first top surface printing unit 220 and the second top surface printing unit 240; A first storage unit 273 that stores an image of the top surface of a non-defective two-color printed workpiece A; a first determination unit 274 which is a determination unit that compares the image of the work A stored in the first storage unit 273 with the image of the work A captured by the first imaging unit 260 to determine whether or not the work A is a non-defective product; a first display unit 275 that is a display unit for an operator to perform settings and adjustments; and a first counting unit 276 that counts the number of non-defective or defective works A.

[0081] The first workpiece placement sensor 213 is a sensor that detects whether or not the workpiece A is fitted in the first workpiece jig 211 of the first placement section 210.

[0082] If the workpiece A is not fitted in the first workpiece jig 211, the first control unit 270 issues an error signal or displays an error on the display screen of the first display unit 275.

[0083] The first lift-up prevention sensor 215 is a sensor that detects whether or not the workpiece A fitted in the first workpiece jig 211 is lifted up.

[0084] In this embodiment, if the workpiece A is floating, it is detected by contacting the first floating prevention sensor 215.

[0085] When the first lift-up prevention sensor 215 detects that the workpiece A has lifted up, the first control unit 270 brings the rotation of the first rotating member 200 to an emergency stop.

[0086] Specifically, when the first lift-up prevention sensor 215 detects that the workpiece A has lifted up, the first rotating member control unit 271 of the first control unit 270 stops driving the first rotating member 200.

[0087] The first rotating member control unit 271 starts and stops the rotational drive of the first rotating member 200.

[0088] The first rotating member control unit 271 can control the rotation speed of the first rotating member 200.

[0089] The top surface printing control unit 272 controls the movement of the first top surface printing unit 220 in the x-axis, y-axis, and z-axis.

[0090] Furthermore, the top surface printing control unit 272 controls the first drive unit 225 to move the first squeegee 223 and the first doctor 224 up and down independently.

[0091] The top surface printing control unit 272 also controls the amount of ink filled by the first filling unit 222 and the timing of filling.

[0092] The first storage unit 273 stores an image of the top surface of the work A that has been accurately printed.

[0093] In this embodiment, the first storage unit 273 stores image data of a work A in a printed state that can be used for a screen printing plate.

[0094] The first judgment unit 274 compares the image or data of the top surface of the work A stored in the first memory unit 273 with the image of the top surface of the work A photographed by the first imaging unit 260 to determine whether the work is good or bad.

[0095] Specifically, the first determination unit 274 determines whether there is any misalignment in the printing, and whether the printed workpiece A has any scratches or stains.

[0096] More specifically, the first determination unit 274 determines whether or not the total area of ​​scratches on the workpiece A is within a preset allowable range.

[0097] The first display section 275 is where the operator can make settings and check the settings etc. In this embodiment, the first display section 275 is a touch panel.

[0098] The first counting section 276 counts the number of good or bad works A.

[0099] This has the advantage that the number of printed works A can be easily determined.

[0100] The first disposal unit 280 removes and discards the workpiece A that the first judging unit 274 has judged to be defective.

[0101] Specifically, the first disposal unit 280 has a first defective product removal arm 281 for removing the workpiece A, and the first defective product removal arm 281 grips the workpiece A and moves the defective product to a disposal location.

[0102] The first delivery section 290 takes out the work A that has been determined to be non-defective by the first determination section 274 and moves it to a delivery location.

[0103] Specifically, the first delivery section 290 has a first non-defective product take-out arm 291 for taking out the workpiece A, and the first non-defective product take-out arm 291 grips the workpiece A and moves the non-defective product to the delivery location.

[0104] The first non-defective product removal arms 291 can be arranged in a regular line at the delivery location.

[0105] The first defective product take-out arm 281 and the first non-defective product take-out arm 291 may be the same member, and in this embodiment they are the same member.

[0106] The workpiece A taken out by the first transport section 290 is transported to the second printing machine 120 by the first transport section 290.

[0107] <2nd printing press 120> As shown in FIGS. 7 to 9, the second printing press 120, which is the printing press 100 according to this embodiment, has a second rotating member 300, which is a rotating member for moving the workpiece A. a first side surface printing unit 320 that prints the side surface of the work A placed on the second placement unit 310 on the second rotating member 300; a first side surface drying unit 330 that dries the ink on the side surface of the work A printed by the first side surface printing unit 320; a second side printing unit 340 that prints markings, letters, numbers, symbols, etc. on the side of the work A after the ink has been dried by the first side drying unit 330; a second side surface drying unit 350 that dries the ink on the side surface of the work A printed by the second side surface printing unit 340; a second imaging unit 360 that captures an image of the printed work A; A second control unit 370 that determines whether the print state of the work A photographed by the second imaging unit 360 is good or bad; a second disposal unit 380 in which the work A determined to be a defective product by the second control unit 370 is disposed of; and a second delivery section 390 to which the work A determined to be a non-defective product by the second control section 370 is delivered.

[0108] The second printing machine 120 is surrounded by a transparent cover, which prevents dust and other foreign matter from entering when the work A is being printed.

[0109] The workpiece A according to this embodiment is a cover case for a pressure gauge having a top surface and side surfaces that are generally circular in plan view.

[0110] The second rotating member 300 has a plurality of rod-shaped protrusions extending radially from the center, rotates clockwise around the center of the circle as its axis, and has a plurality of second placement portions 310 at its tip on which the work A is placed.

[0111] The second placement unit 310 can rotate (spin) in the direction of travel, and when printing the side of the workpiece A, the second placement unit 310 rotates in the direction of travel, making it possible to print the entire peripheral side of the workpiece A fixed to the second placement unit 310.

[0112] In this embodiment, the second arrangement portions 310 are provided at ten locations on the second rotating member 300.

[0113] The second placement section 310 includes a second workpiece jig 311 for fitting the workpiece A at its tip, and a first / second workpiece placement sensor 313 that detects that workpiece A has been placed on the second workpiece jig 311.

[0114] The second arrangement section 310 may be provided with a squeegee guide.

[0115] The second workpiece jig 311 is provided with a positioning section 314 that performs positioning when the workpiece A is placed.

[0116] The second workpiece jig 311 has a positioning portion 314 for positioning the workpiece A.

[0117] The workpiece A has a depression or protrusion for performing alignment corresponding to the alignment portion 314.

[0118] Specifically, a positioning pin is used in the positioning portion 314, and the work A is provided with a notch (not shown) into which the positioning pin can be fitted.

[0119] A first and second workpiece placement sensor 313 is disposed in the second placement section 310, and the first and second workpiece placement sensor 313 detects whether or not the workpiece A is placed on the second workpiece jig 311.

[0120] When the first / second workpiece placement sensor 313 detects that the workpiece A is placed on the second workpiece jig 311, the second control unit 370 is notified of this information.

[0121] A second lift prevention sensor 315 that prevents work A from lifting up is placed between the point where the worker places work A on the second work jig 311 of the second placement section 310 and the point where the first side printing section 320 is placed.

[0122] When the workpiece A fitted in the second workpiece jig 311 is floating above the second workpiece jig 311, the second floating prevention sensor 315 detects the workpiece A when the second rotating member 300 rotates.

[0123] In this embodiment, the second lift-up prevention sensor 315 is a contact sensor, and when the workpiece A comes into contact with the second lift-up prevention sensor 315, the second lift-up prevention sensor 315 detects the workpiece A.

[0124] When the second lift-up prevention sensor 315 detects the workpiece A, the information is notified to the second control unit 370, and the second control unit 370 issues an error notification and stops the rotation of the second rotating member 300.

[0125] The first side surface printing unit 320 performs solid printing on the side surface of the workpiece A. Specifically, the first side surface printing unit 320 performs silk screen printing. Note that the first side surface printing unit 320 may be capable of pad printing (pad printing, tampo printing) and ink jet printing in addition to screen printing.

[0126] The first side surface printing unit 320 includes a second screen plate 321 that is placed on the second placement unit 310 that has been moved by the rotation of the second rotating member 300; a second filling section 322 for filling ink onto the second screen plate 321; a second squeegee 323 and a second doctor 324 for applying ink to the top surface of the work A from above the second screen 321; and a second driving unit 325 for driving the second squeegee 323 and the second doctor 324 up and down and left and right.

[0127] The workpiece A in the second placement section 310 placed below the second screen plate 321 is coated with ink together with the second screen plate 321 by the second squeegee 323 .

[0128] In this embodiment, the second screen 321 is a screen that can print the side surface of the workpiece A in solid form.

[0129] The second filling section 322 fills the second screen plate 321 with ink before the second squeegee 323 and the second doctor blade 324 are driven.

[0130] The second squeegee 323 applies ink to the side surface of the workpiece A.

[0131] The second doctor 324 is where so-called ink return takes place.

[0132] The second drive unit 325 drives the second squeegee 323 and the second doctor 324 independently up and down.

[0133] Further, the second driving section 325 can simultaneously drive the second squeegee 323 and the second doctor 324, which are a unit, up and down and left and right.

[0134] The second control unit 370 controls the second drive unit 345, thereby controlling the up / down and left / right movement of the entire first side surface printing unit 320.

[0135] The second drive unit 325 can be manually moved.

[0136] That is, the operator can manually drive the second squeegee 323 and the second doctor blade 324 and make fine adjustments without using the second control unit 370.

[0137] When the second placement unit 310 is positioned below the second screen plate 321 (when the workpiece A is positioned below the second screen plate 321), the second drive unit 345 moves up, down, left and right, and the first side printing unit 320 uses the second squeegee 323 and the second doctor 324 to print (solid print) the side of the workpiece A together with the second screen plate 321.

[0138] When the second squeegee 323 is lowered and movable, the second doctor 324 is raised, and when the second doctor 324 is lowered and movable, the second squeegee 323 is raised.

[0139] In this embodiment, when the second squeegee 232 descends and moves in the forward direction to print, the second placement section 310 rotates under the second screen plate 321 while moving in the forward direction to print the entire side of the workpiece A.

[0140] Specifically, the second placement unit 310 rotates while moving at the same speed as the second squeegee 232, and prints on the entire side surface of the workpiece A.

[0141] In this embodiment, the rotation direction of the second rotating member 300 is clockwise in a plan view, and since the second arrangement section 310 passes below the second screen plate 321, the rotation direction of the second arrangement section 310 is also clockwise.

[0142] The first side surface drying section 330 dries the side surface of the workpiece A that has been printed by the first side surface printing section 320 .

[0143] The first side surface drying section 330 dries the side surface of the workpiece A that has been printed by the first side surface printing section 320 .

[0144] The first side surface drying section 330 has a third hot air control section 331 and a third hot air nozzle 332, and the third hot air control section 331 can set the temperature and air volume.

[0145] In this embodiment, the third hot air nozzles 332 are provided in two locations, and hot air is blown onto the side peripheral surface of the workpiece A from different directions to dry it.

[0146] In this embodiment, hot air is blown from the third hot air nozzle 332 of the first side surface drying section 330 onto the workpiece A printed by the first side surface printing section 320 to dry it.

[0147] The third hot air control section 331 and the second control section 370 may be included in the configuration.

[0148] That is, the first side surface drying section 330 may be controlled by the second control section 370.

[0149] The second side surface printing unit 340 performs further printing (screen printing) on ​​the side surface of the work A that has been solid printed by the first side surface printing unit 320. Note that the second side surface printing unit 340 may be capable of pad printing (pad printing, tampo printing) and ink jet printing in addition to screen printing.

[0150] In this embodiment, on the side of the work A that has been solid printed by the first side printing unit 320, markings, numbers, symbols, logos, etc. are printed in a color different from the color used by the first side printing unit 320.

[0151] The configuration of the second side surface printing section 340 is the same as the configuration of the first side surface printing section 320, and therefore a description thereof will be omitted.

[0152] By printing memory, numbers, symbols, logos, etc. on the side of work A, it has the effect of being visible from the side when using work A.

[0153] The second side surface drying section 350 is where the side surface of the work A on which the markings and the like have been printed by the second side surface printing section 340 is dried.

[0154] The second side surface drying section 350 has a fourth hot air control section 351 and a fourth hot air nozzle 352, and the fourth hot air control section 351 can set the temperature and air volume.

[0155] In this embodiment, the fourth hot air nozzles 352 are provided in two locations, and hot air is blown onto the side peripheral surface of the work A from different directions to dry it.

[0156] The third hot air control section 331 and the fourth hot air control section 351 may be the same.

[0157] The fourth hot air control section 351 may be configured to be included in the second control section 370, similar to the third hot air control section 331.

[0158] The configuration of the second side surface drying section 350 is the same as the configuration of the first side surface drying section 330, and therefore a description thereof will be omitted.

[0159] The second imaging unit 360 is where an image of the printed work A is taken.

[0160] In this embodiment, the image of work A captured by the second imaging unit 360 is compared with an image of work A previously stored in the second control unit 370, and the second control unit 370 determines whether the work is a good product or not by comparing the images.

[0161] The second control unit 370 includes a second rotating member control unit 371 that controls the driving of the second rotating member 300, a side surface printing control unit 372 that controls the driving of the first side surface printing unit 320 and the second side surface printing unit 340; A second storage unit 373 that stores an image of the side surface of the two-color printed work A that is a non-defective product; a second determination unit 374 which is a determination unit that compares the image of the work A stored in the second storage unit 373 with the image of the work A captured by the second imaging unit 360 to determine whether the work A is a non-defective product; a second display unit 375 that is a display unit for an operator to perform settings and adjustments; and a second counting unit 376 that counts the number of good or bad works A.

[0162] The second workpiece placement sensor 313 is a sensor that detects whether or not the workpiece A is fitted in the second workpiece jig 311 of the second placement section 310.

[0163] If the workpiece A is not fitted in the second workpiece jig 311, the second control unit 370 issues an error signal or displays an error message on the display screen of the second display unit 375.

[0164] The second lift-up prevention sensor 315 is a sensor that detects whether or not the workpiece A fitted in the second workpiece jig 311 is lifted up from the jig.

[0165] In this embodiment, if the workpiece A is floating, it is detected by contacting the second floating prevention sensor 315.

[0166] When the second lift-up prevention sensor 315 detects that the workpiece A has lifted up, the second control unit 370 brings the rotation of the second rotating member 300 to an emergency stop.

[0167] Specifically, when the second lift-up prevention sensor 315 detects that the workpiece A has lifted up, the second rotating member control unit 371 of the second control unit 370 stops the driving of the second rotating member 300.

[0168] The second rotating member control section 371 starts and stops the rotational drive of the second rotating member 300.

[0169] The second rotating member control unit 371 can control the rotation speed of the second rotating member 300.

[0170] The side surface printing control unit 372 controls the movement of the first side surface printing unit 320 in the x-axis, y-axis, and z-axis.

[0171] Furthermore, the side printing control unit 372 controls the second drive unit 325, and can move the second squeegee 323 and the second doctor blade 324 up and down independently.

[0172] The side printing control unit 372 also controls the amount of ink filled by the second filling unit 322 and the timing of filling.

[0173] The second storage unit 373 stores an image of the side surface of the work A that has been accurately printed.

[0174] In this embodiment, the second storage unit 373 stores image data of a work A in a printed state that can be used for a screen printing plate.

[0175] The first storage unit 273 and the second storage unit 373 may be the same storage device.

[0176] The second judgment unit 374 compares the image or data of the top surface of the work A stored in the second memory unit 373 with the image of the top surface of the work A photographed by the second imaging unit 360 to determine whether the work is good or bad.

[0177] Specifically, the second determination unit 374 determines whether there is any misalignment in the printing, and whether the printed workpiece A has any scratches or stains.

[0178] More specifically, the second determination unit 374 determines whether or not the total area of ​​scratches on the workpiece A is within a preset allowable range.

[0179] The second display section 375 is where the operator can make settings and check the settings etc. In this embodiment, the second display section 375 is a touch panel.

[0180] The second counting section 376 counts the number of good or bad works A.

[0181] This has the advantage that the number of printed works A can be easily determined.

[0182] The second disposal unit 380 removes and discards the workpiece A that the second judging unit 374 judges to be defective.

[0183] Specifically, the second disposal unit 380 has a second defective product removal arm 381 for removing the workpiece A, and the second defective product removal arm 381 grips the workpiece A and moves the defective product to a disposal location.

[0184] The second delivery section 390 takes out the work A that the second judging section 374 judges to be a non-defective product and moves it to the delivery location.

[0185] Specifically, the second delivery section 390 has a second non-defective product take-out arm 391 for taking out the workpiece A, and the second non-defective product take-out arm 391 grips the workpiece A and moves the non-defective product to the delivery location.

[0186] The second non-defective product removal arms 391 can be arranged in a regular line at the delivery location.

[0187] The second defective product take-out arm 381 and the second non-defective product take-out arm 391 may be the same member, and in this embodiment they are the same member.

[0188] The workpiece A taken out by the second transport section 390 is transported by the second transport section 390 to the location where the finished product will be placed.

[0189] Second Embodiment The second embodiment is configured to use UV ink (ultraviolet curable ink) as the ink, whereby the first top surface drying section 230, the second top surface drying section 250, the first side surface drying section 330, and the second side surface drying section 350 cure the UV ink by UV irradiation, thereby drying the top surface and side surface of the workpiece A. Specifically, this is as follows. Note that a description of the same configuration as the first embodiment will be omitted.

[0190] As shown in FIGS. 10 to 14, the first top surface drying unit 230 according to this embodiment includes a first UV irradiation device 233 that performs UV irradiation, and a first cooling device 234 for cooling the work A.

[0191] The first UV irradiation device 233 uses a UV lamp to irradiate the top surface of the workpiece A coated with UV ink with UV light.

[0192] Examples of UV lamps include high-pressure mercury lamps, metal halide lamps, and UV-LED lamps.

[0193] The UV ink applied to workpiece A is hardened by irradiating it with UV light.

[0194] The first cooling device 234 is an air-cooling type, and cools the UV-irradiated workpiece A with air.

[0195] In this embodiment, the first top surface drying unit 230 is controlled by a first control unit 270.

[0196] Next, the second top surface drying unit 250 according to this embodiment includes a second UV irradiation device 253 that performs UV irradiation, and a second cooling device 254 for cooling the work A.

[0197] The specific configuration of the second top surface drying section 250 is the same as that of the first top surface drying section 230, and therefore a description thereof will be omitted.

[0198] If the first top surface drying section 230 and the second top surface drying section 250 have such a configuration, the present invention can be implemented when the ink is UV ink.

[0199] Next, the first side surface drying section 330 according to this embodiment includes a third UV irradiation device 333 that performs UV irradiation, and a third cooling device 334 for cooling the work A.

[0200] The third UV irradiation device 333 uses a UV lamp to irradiate the side surface of the work A on which the UV ink has been applied with UV light.

[0201] Examples of UV lamps include high-pressure mercury lamps, metal halide lamps, and UV-LED lamps.

[0202] The UV ink applied to workpiece A is hardened by irradiating it with UV light.

[0203] The third cooling device 334 is an air-cooling type, and cools the UV-irradiated workpiece A with air.

[0204] The first side surface drying section 330 according to this embodiment is controlled by a second control section 370.

[0205] Next, the second side surface drying section 350 according to this embodiment includes a fourth UV irradiation device 353 that performs UV irradiation, and a fourth cooling device 354 for cooling the work A.

[0206] The specific configuration of the second side surface drying section 350 is the same as that of the first side surface drying section 353, and therefore a description thereof will be omitted.

[0207] If the first side surface drying section 330 and the second side surface drying section 350 have such a configuration, the present invention can be implemented when the ink is UV ink.

[0208] <Manufacturing method for work A with printed top and side surfaces> As shown in FIG. 15, work A is fitted into a first work jig 211 in a first placement section 210 in which a squeegee guide 212 is provided (first work placing step, step S11).

[0209] Next, the first top surface printing unit 220 performs solid printing on the top surface of the workpiece A using the first squeegee 223 and the first doctor 224 (first top surface printing step, step S12).

[0210] The first top surface printing unit 220 disposed above the first rotating member 200 is fixed during printing, and performs screen printing by moving a first squeegee 223 and a first doctor 224 up and down and left and right.

[0211] Next, the first top surface drying unit 230 dries (including hardening) the top surface of the printed workpiece A (first top surface drying step, first UV irradiation step, step S13).

[0212] In this embodiment, when the first placement section 200 is at the positions 200d and 200e, the first top surface drying section 230 dries (including hardens) the top surface of the workpiece A.

[0213] Next, the second top surface printing unit 240 prints marks, letters, etc. on the top surface of the solid-printed work A (second top surface printing step, step S14).

[0214] The configuration of the second top surface printing unit 240 is similar to the configuration of the first top surface printing unit 220.

[0215] Next, the second top surface drying unit 250 dries (including hardening of the UV ink) the top surface of the printed workpiece A (second top surface drying step, second UV irradiation step, step S15).

[0216] The second top surface drying section 250 has the same configuration as the first top surface drying section 230.

[0217] In this embodiment, when the first placement section 200 is at the positions 200g and 200h, the second top surface drying section 250 dries the top surface of the workpiece A (including curing the UV ink).

[0218] Next, the first imaging unit 260 captures an image of the printed workpiece A (first imaging step, step S16).

[0219] Next, the first determination section 274 compares the video captured by the first imaging section 260 with the video stored in the first storage section 273 to determine whether the video is good or bad (first determination step, step S17).

[0220] Next, if the first judging section 274 judges the work A to be defective, the first discarding section 280 discards the work A (first discarding step, step S18).

[0221] Next, if the first judging section 274 judges the work A to be a non-defective product, the first delivery section 290 delivers the work A (first delivery step, step S19).

[0222] As shown in Fig. 16, the same steps as above are performed on the side surface (peripheral side surface) of the work A. That is, the following steps are further performed.

[0223] The workpiece A is fitted into the second workpiece jig 311 of the second placement section 310 (workpiece setting step, step S21).

[0224] The first side surface printing unit 320 performs solid printing on the side surface of the workpiece A using the second squeegee 323 and the second doctor blade 324 (first side surface printing step, step S22).

[0225] Next, the first side surface drying section 330 dries (including hardening of the UV ink) the printed side surface (peripheral side surface) of the workpiece A (first side surface drying step, third UV irradiation step, step S23).

[0226] Next, the second side surface printing unit 340 prints markings, characters, etc. on the side surface (peripheral side surface) of the work A that has been solid printed (second side surface printing step, step S24).

[0227] The configuration of the second side surface printing section 340 is similar to the configuration of the first side surface printing section 320.

[0228] Next, the second side surface drying section 350 dries (including hardening of the UV ink) the printed side surface (peripheral side surface) of the workpiece A (second side surface drying step, fourth UV irradiation step, step S25).

[0229] The second side surface drying section 350 has the same configuration as the first side surface drying section 330.

[0230] Next, the second imaging unit 360 captures an image of the printed workpiece A (second imaging step, step S26).

[0231] Next, the second determination unit 374 compares the image captured by the second imaging unit 360 with the image stored in the second storage unit 373 to determine whether the image is good or bad (second determination step, step S27).

[0232] Next, if the second judging section 374 judges the work A to be defective, the second discarding section 380 discards the work A (second discarding step, step S28).

[0233] Next, if the second judging section 374 judges the work A to be non-defective, the second delivery section 390 delivers the work A (second delivery step, step S29).

[0234] The present invention can be implemented in various forms with various improvements, modifications, or variations added thereto without departing from the spirit of the invention. [Explanation of symbols]

[0235] 100...Printing machine 110…1st printing press 120…Second printing press 200...First rotating member 210…1st placement part 211...First workpiece jig 212...Squeegee guide 213...First workpiece placement sensor 215...First anti-lift sensor 220...First top printing section 230...First top drying section 240...Second top printing section 250...Second top drying section 260...First imaging unit 270...First control section 271...First rotating member control section 272...Top surface printing control unit 273...1st memory section 274...1st judgment section 275...1st display section 280...1st Disposal Department 290…1st delivery department 300...Second rotating member 310…Second placement part 320...1st side printing section 330...First side drying section 340…Second side printing section 350…Second side drying section 360...Second imaging unit 370...Second control section 380...Second Disposal Section 390…Second delivery department

Claims

1. A printing machine that prints on a workpiece having a top surface using UV ink, the printing machine including a first printing machine that prints on the top surface of the workpiece; The first printing machine includes a first rotating member that is a turntable for moving a workpiece, the first rotating member has a first placement portion equipped with a first workpiece jig for placing a workpiece; The first printing press comprises: a first lift prevention sensor that detects lifting of a workpiece placed on the first workpiece jig; a first top surface printing unit that prints a top surface of a workpiece placed on the first workpiece jig of the first placement unit on the first rotating member; a first top surface drying unit that dries the ink on the top surface of the work printed by the first top surface printing unit; a second top surface printing unit that prints a mark, a letter, a number, or a symbol on the top surface of the workpiece on which the ink has been dried by the first top surface drying unit, using an ink of a different color from the ink; a second top surface drying unit that dries the ink on the top surface of the work printed by the second top surface printing unit; a first imaging unit that captures an image of the printed workpiece; A first control unit including a first storage unit that stores data including an image of the work in a printed state, and a first determination unit that determines whether the print state of the work photographed by the first imaging unit is good or bad; a first discarding unit that discards the workpiece determined to be a defective product by the first determining unit; a first delivery unit to which the workpiece determined to be a non-defective product by the first determination unit is delivered, the first rotating member has a first placement portion for placing a workpiece; the first placement unit includes a first work placement sensor that detects that a work has been placed on the first work jig; The first top surface drying unit includes a first UV irradiation device that irradiates UV light onto the top surface of the workpiece printed with UV ink by the first top surface printing unit, The second top surface drying unit includes a second UV irradiation device that irradiates UV light onto the top surface of the workpiece printed with UV ink by the second top surface printing unit, The first judgment unit is a printing machine that compares an image of the work stored in the first storage unit with an image captured by the first imaging unit to determine whether the work is good or bad.

2. A printing machine that prints on a workpiece having a side surface using UV ink, the printing machine including a second printing machine that prints the side surface of the workpiece; The second printing machine includes a second rotating member that is a rotating member for moving a workpiece, the second rotating member has a plurality of rod-shaped protrusions extending radially from a center thereof, and a second placement portion provided with a second workpiece jig for placing a workpiece at the tip of the protrusions; The second printing press is a first side surface printing unit configured to print a side surface of a workpiece placed on the second workpiece jig of the second placement unit provided on the second rotating member; a first side surface drying unit that dries the ink on the side surface of the work printed by the first side surface printing unit; a second side printing unit that prints a mark, a letter, a number, or a symbol on the side of the workpiece on which the ink has been dried by the first side drying unit, using an ink of a different color from the ink; a second side drying unit that dries the ink on the side of the work printed by the second side printing unit; a second imaging unit that captures an image of the printed workpiece; A second control unit includes a second storage unit that stores data including an image of the workpiece in a printed state, and a second determination unit that determines whether the print state of the workpiece photographed by the second imaging unit is good or bad; a second discarding unit that discards the workpiece determined to be a defective product by the second determining unit; a second delivery unit to which the workpiece determined to be a non-defective product by the second determination unit is delivered, The first side drying unit includes a third UV irradiation device that irradiates UV rays onto the side of the workpiece printed with UV ink by the first side printing unit, The second side drying unit includes a fourth UV irradiation device that irradiates UV light onto the side of the workpiece printed with UV ink by the second side printing unit, The second judgment unit is a printing machine that judges whether the workpiece is good or bad by comparing an image of the workpiece stored in the second storage unit with an image captured by the second imaging unit.

3. A printing method for a printing machine that prints on a workpiece having a top surface using UV ink, the printing machine including a first printing machine that prints on the top surface of the workpiece, The first printing machine includes a first rotating member that is a turntable for moving a workpiece, the first rotating member has a first placement portion equipped with a first workpiece jig for placing a workpiece; The printing process by the first printing press includes: a detection step using a first lift-up prevention sensor to detect lift-up of the workpiece placed on the first workpiece jig; a first top surface printing step of printing a top surface of a workpiece placed on the first workpiece jig in the first placement unit; a first top surface drying step of drying the ink on the top surface of the workpiece printed in the first top surface printing step; a second top surface printing step of printing a mark, a letter, a number, or a symbol on the top surface of the workpiece after the ink has dried in the first top surface drying step using an ink of a different color from the ink; a second top surface drying step of drying the ink on the top surface of the workpiece printed in the second top surface printing step; a first imaging step of imaging the printed workpiece; a first storage step of storing data including an image of the workpiece in a printed state; a first determination step of determining whether the print state of the work photographed by the first imaging step is good or bad; a first discarding step in which the workpiece determined to be a defective product by the first determining step is discarded; a first delivery process in which the workpiece determined to be a non-defective product by the first determination process is delivered; The first top surface drying step includes a first UV irradiation step of irradiating UV light onto the top surface of the workpiece printed with UV ink in the first top surface printing step, The second top surface drying process includes a second UV irradiation process of irradiating UV light onto the top surface of the workpiece printed with UV ink in the second top surface printing process, A printing method for a printing press in which the first judgment step compares the image of the work stored in the first storage step with the image captured in the first imaging step to determine whether the work is good or bad.

4. A printing method for a printer that prints on a workpiece having a side surface using UV ink, wherein the printer includes a second printer that prints on the side surface of the workpiece; The second printing machine includes a second rotating member that is a rotating member for moving a workpiece, the second rotating member has a plurality of rod-shaped protrusions extending radially from a center thereof, and a second placement portion provided with a second workpiece jig for placing a workpiece at the tip of the protrusions; The printing process by the second printing machine includes: a second side surface printing step of printing a side surface of the workpiece placed on the second workpiece jig in the second placement section; a first side surface drying step for drying the ink on the side surface of the workpiece printed in the second side surface printing step; a second side printing step of printing a mark, a letter, a number, or a symbol on the side of the work on which the ink has dried in the first side drying step using an ink of a different color from the ink; a second side surface drying step of drying the ink on the side surface of the workpiece printed in the second side surface printing step; a second imaging step of imaging the printed workpiece; a second storage step of storing data including an image of the workpiece in a printed state; a second determination step of determining whether the print state of the work photographed in the second imaging step is good or bad; a second discarding step in which the workpiece determined to be a defective product in the second determining step is discarded; a second delivery process in which the workpiece determined to be a non-defective product in the second determination process is delivered; The first side surface drying step includes a third UV irradiation step of irradiating UV light onto the side surface of the workpiece printed with UV ink in the first side surface printing step, The second side drying step includes a fourth UV irradiation step of irradiating UV light onto the side of the workpiece printed with UV ink in the second side printing step, A printing method for a printing press in which the second judgment step compares the image of the work stored in the second storage step with the image captured in the second imaging step to determine whether the work is good or bad.

Images