JP2012131203A - Cylinder screen printing device and printing method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder screen printing device and a printing method using the same which can position a printing material without being effected by end face finishing of a front edge end portion of the printing material.SOLUTION: The cylinder screen printing device including a printing cylinder 2 for performing multicolor printing of two or more colors on the printing material, and a printing plate includes: an alignment stage driven by a multiple-axis actuator for positioning the printing material on the upstream side of the printing cylinder; a vacuum means 19 mounted on the alignment stage for sucking at least a portion of a lower surface of the printing material; and an image sensor 30 for detecting the position of the printing material. An alignment mark is printed on the printing material during first color printing, and the image sensor 30 matches a registration mark registered with a printing plate position in each printing plate of the second and subsequent colors as a reference with the alignment mark printed on the printing material during the first color printing in order to perform positioning of the printing material.

Description

  The present invention relates to a cylinder type screen printing apparatus and a printing method using the same.

  Conventionally, various cylinder type screen printing apparatuses are known (for example, refer to Patent Document 1).

JP 2009-073032 A

  As is well known, a conventional cylinder-type screen printing machine presses a screen frame having a screen plate (printing plate) disposed above a rotatable printing cylinder (printing cylinder) with a squeegee to remove the printing cylinder. Printing is performed on an object to be printed placed on the surface. The substrate is transported to the printing cylinder side by a transport unit arranged on the upstream side of the printing press, and the leading edge portion and the side register portion provided in the concave portion of the printing cylinder are transported in the transport direction and Positioning in both directions perpendicular to the transport direction is performed, and printing is started.

  However, the conventional positioning method has a problem in that it depends on the accuracy of the leading edge of the substrate. That is, when the accuracy of the finishing of the front edge of the printed material is low, the printed material is positioned by the front register and the horizontal register at the front edge of which the accuracy is low. When two-color printing is performed on a substrate, there is a problem that printing of the first color and printing of the second color are shifted, and printing accuracy is lowered.

  The present invention has been made in view of the above-described problems of the prior art, and cylinder-type screen printing capable of positioning a printing material that is not affected by the end surface finish of the front edge of the printing material. An object is to provide an apparatus and a printing method using the same. In addition, the above-described front register and the side register can be used to perform positioning based on the front edge of the printed material, and the printed material is not affected by the finish of the front edge of the printed material. It is an object of the present invention to provide a cylinder-type screen printing apparatus that can perform printing and a printing method using the same.

The present invention is a cylinder-type screen printing machine having a printing cylinder and a printing plate for printing two or more colors of a printing material,
The cylinder type screen printing machine has an upstream side of the printing cylinder,
An alignment stage that is driven by a multi-axis actuator for positioning the substrate;
A vacuum means attached to the alignment stage for adsorbing at least part of the lower surface of the substrate;
An image sensor for detecting the position of the substrate,
An alignment mark is printed on the substrate when the first color is printed, and the image sensor uses the registration mark registered on the basis of the printing plate position in the second and subsequent printing plates as the first color. Provided is a cylinder-type screen printing machine characterized in that each printing of the second and subsequent colors is performed by positioning the printing material in alignment with the alignment mark printed on the printing material at the time of printing.

  The vacuum means has a vacuum surface formed with a plurality of holes for adsorbing at least part of the lower surface of the substrate.

  Further, the positioning is performed in a state where the printing material is sucked and fixed on the vacuum surface.

  Further, the cylinder type screen printing machine can be a printing machine that has a front register part and a side register part, and performs positioning based on the front edge of the printed material by the front register part and the side register part. .

  Furthermore, the present invention provides a printing method characterized in that printing is performed by positioning an object to be printed using the cylinder type screen printing machine according to any one of claims 1 to 4.

  ADVANTAGE OF THE INVENTION According to this invention, the to-be-printed material can be positioned without being influenced by the end surface finish of the front edge part of a to-be-printed material. In addition, it is possible to perform positioning based on the front edge portion of the printed material by the front register portion and the lateral register portion, and to perform positioning of the printed material that is not affected by the end surface finish of the front edge portion of the printed material. be able to.

FIG. 1 is a schematic view of a cylinder type screen printing machine according to the present invention. FIG. 2 is a schematic partial sectional view of a cylinder type screen printing machine according to the present invention. FIG. 3 is a plan view showing a transport section of the cylinder type screen printing machine according to the present invention. FIG. 4 is a schematic perspective view showing a vacuum means applicable to the present invention. FIG. 5 is a partial cross-sectional view mainly showing an alignment module applicable to the present invention. FIG. 6 is a plan view illustrating an example of an image sensor provided in a transport unit applicable to the present invention. FIG. 7 is a plan view showing an example of an image sensor applicable to the present invention. FIG. 8 is a plan view showing an example of an alignment mark applicable to the present invention. FIG. 9 is a plan view showing an example of a laser projector applicable to the present invention. FIG. 10 is a schematic view showing a part of the operation of the cylinder type screen printing machine according to the present invention. FIG. 11 is a schematic view showing another part of the operation of the cylinder type screen printing machine according to the present invention. FIG. 12 is a schematic view showing still another part of the operation of the cylinder type screen printing machine according to the present invention. FIG. 13 is a schematic view showing still another part of the operation of the cylinder type screen printing machine according to the present invention. FIG. 14 is a schematic side view showing still another part of the operation of the cylinder type screen printing machine according to the present invention. FIG. 15 is a schematic diagram showing calibration of the operation of the cylinder type screen printing machine according to the present invention. FIG. 16 is a perspective view showing an example of a screen frame and an auxiliary frame having a screen plate (printing plate) applicable to the present invention. FIG. 17 is a top view showing an example of a screen frame having a screen plate (press plate) applicable to the present invention, an auxiliary frame, and a projector. FIG. 18 is a plan view showing an example of a laser projector applicable to the present invention. FIG. 19 is a side view showing an example of a laser projector applicable to the present invention.

The best mode for carrying out a cylinder type screen printing apparatus and a printing method using the same according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a cylinder type screen printing machine according to the present invention, and FIG. 2 is a schematic partial sectional view thereof. As shown in FIGS. 1 and 2, a cylinder type screen printing machine 1 includes a rotatable printing cylinder (printing cylinder) 2 and a screen frame having a screen plate (printing plate) disposed above the printing cylinder 2. 3, a transport unit 4 disposed on the upstream side of the printing press, and a paper discharge unit 5 disposed on the downstream side of the printing press.

As shown in FIGS. 2 and 3, the printing cylinder 2 is formed with a recess 7 extending along the central axis 6 of the printing cylinder 2 (see FIG. 2), and can rotate counterclockwise in FIG. it can. As is well known, a plurality of grippers 8, nail pads 9, a front register 10, a front register sensor 17, and the like are arranged in the recess 7. The gripper 8 is rotatably supported in the recess 7, and its tip end grips the tip end portion (front edge end portion) of the printing material disposed on the outer surface of the printing cylinder 2. ing. The claw pad 9 is disposed at a position in contact with the tip of the gripper 8 in the recess 7. Further, the front register 10 is disposed at the side end of the nail pad 9 at an appropriate interval in the direction along the central axis 6 of the printing cylinder 2 (direction orthogonal to the paper surface in FIG. 2). The leading register (front edge) of the printed material conveyed from the conveying unit 4 arranged on the upstream side of the printing press 1 is brought into contact with the front register 10 to position the printed material in the conveying direction. Done. Further, the front registration sensor 17 is arranged at an appropriate interval in the direction along the central axis 6 of the printing cylinder 2. The front registration sensor 17 is a detection sensor for detecting a printed material in a state in which a front edge end is in contact with the front registration unit 10.

In addition, the conveyance unit 4 on the upstream side of the printing cylinder 2 is provided with a lateral register unit 18 on the side adjacent to the printing cylinder 2, and the lateral register unit 18 extends along the central axis 6 of the printing cylinder 2. A pair of side register portions 11 are provided at predetermined intervals in the direction. The side register unit 11 performs positioning in a direction (a direction along the central axis 6 of the printing cylinder 2 in FIG. 3) perpendicular to the conveyance direction of the substrate. Accordingly, the printing material is conveyed to the printing cylinder 2 side by the conveying unit 4 arranged on the upstream side of the printing press 1, and the front edge portion 10 provided in the concave portion 7 of the printing cylinder 2 is connected to the front registering unit 10. The lateral register unit 11 performs positioning in both the transport direction and the direction orthogonal to the transport direction, and printing is started.

The screen frame 3 disposed above the printing paper cylinder 2 is provided on the outer periphery of a screen plate (press plate) formed by a mesh corresponding to the printing pattern. As well shown in FIG. 2, a squeegee 12, a scraper 13, and the like are disposed above the screen frame 3. Further, the transport unit 4 arranged on the upstream side of the printing press 1 has a transport belt 14, and print substrates supplied one by one from a stacking unit (not shown) for stacking the print products are printed on the printing cylinder. It is designed to be transported to the second side. The paper discharge unit 5 arranged on the downstream side of the printing press has a discharge belt 15 as shown in the figure, and discharges the substrate to be printed conveyed from the printing cylinder 2 to a drying device (not shown). It is supposed to be.

As shown in FIG. 3, the transport unit 4 has a feed board 16. The printed material is conveyed by the conveying belt 14 on the feed board 16 until the front edge end portion comes into contact with the front registering portion 10. The feed board 16 includes a plurality of pressing rollers 28 and brush rollers 29. Further, a side register unit 18 having the pair of side register parts 11 is attached to the feed cylinder 16 on the printing cylinder 2 side. In addition, the printed material in a state where the front edge end portion of the printed material is in contact with the front register 10 is detected by the front register sensor 17.

The feed board 16 is provided with a vacuum means 19 at a central position in the direction along the central axis 6 of the printing cylinder 2 and at a position on the side register unit 18 side. More specifically, as shown in FIGS. 4 and 5, the vacuum means 19 has a vacuum surface 20 having a plurality of holes formed on the upper surface, which adsorbs at least a part of the lower surface of the substrate. 21, a vacuum source (not shown) communicated with the inside of the housing 21 via a vacuum hose 22, and a base plate 23 attached to the lower surface of the housing 21. Three alignment modules 25, 26, 27 are attached, and the vacuum means 19 is attached to the feed board 16 through the three alignment modules 25, 26, 27.

  The three alignment modules 25, 26, and 27 are X alignment modules 25 as uniaxial actuators for positioning the substrate in a direction orthogonal to the transport direction, that is, along the central axis 6 of the printing cylinder 2. And a Y1 alignment module 26 and a Y2 alignment module 27 as a biaxial actuator for positioning the substrate in the transport direction. Each alignment module includes a cross roller bearing, an LM actuator, an AC servo motor, and the like.

  As shown in FIGS. 3 and 6, the feed board 16 is provided with two image sensors 30 and a plurality of illumination means 31 in the vicinity of the vacuum means 19. More specifically, the feed board 16 is provided with an X-axis guide 35 extending in a direction orthogonal to the transport direction (X-axis direction). On the X-axis guide 35, the vacuum means 19 Image sensors 30 and illumination means 31 are provided on both sides in the X-axis direction, respectively. In the illustrated example, each illumination unit 31 includes a pair of illumination units and is disposed on both sides of the image sensor 30. The feed board 16 is provided with a Y-axis guide 34 extending in the transport direction (Y-axis direction). The X-axis guide 35 is attached to the Y-axis guide 34 so as to be movable in the Y-axis direction. Yes. The position of the X-axis guide 35 in the Y-axis direction is adjusted by the adjustment handle 32, and the position of the X-axis guide 35 in the Y-axis direction is fixed by the fixed handle 33. By adjusting the position of the X-axis guide 35 in the Y-axis direction by the adjustment handle 32, the position of the image sensor 30 and the illumination unit 31 in the Y-axis direction is adjusted, and the fixed handle 33 in the Y-axis direction of the X-axis guide 35 is adjusted. By fixing the position, the position of the image sensor 30 and the illumination unit 31 in the Y-axis direction is fixed. FIG. 7 shows a plan view of the image sensor 30. As shown in FIG. 7, the image sensor 30 mainly includes a lens 36, a side viewer attachment 37, an X-axis fine adjustment unit 38, a Y-axis fine adjustment unit 39, and a Z-axis fine adjustment unit 40. ing. The image sensor 30 is for detecting the position of the substrate, and as shown in FIG. 8, by detecting an alignment mark 43 formed in advance on the substrate 42, the image sensor 30 is orthogonal to the conveyance direction and the conveyance direction. The position of the substrate to be printed in the direction of printing is detected. The illustrated alignment mark 43 is a cross-shaped mark, but is not limited to this.

  Further, as shown in FIG. 9, the alignment mark pattern for the alignment mark 43 formed in advance on the printing material 42 is the screen frame 3 having a screen plate (press plate) 44 at the time of plate change at the time of multicolor printing. It is used for positioning adjustment. The screen frame 3 is arranged in an adjustable auxiliary frame (indicated by reference numeral 52 in FIGS. 16 and 17) arranged on the main body side, and is a screen at the time of plate change in multicolor printing. The positioning is adjusted with high accuracy together with the auxiliary frame so that there is no positional deviation between the frames. In this adjustment, the line pattern 46 in the X-axis direction and the line pattern 47 in the Y-axis direction projected on the screen plate 44 from the laser projector 45 arranged in the vicinity of the screen plate (press plate) 44 are used for the alignment mark 43. This can be realized by matching with the alignment mark pattern. The laser projector 45 can adjust the projection angle in order to align the line pattern with the alignment mark pattern for the alignment mark. More specifically, as shown in FIGS. 16 and 17, the auxiliary frame 52 on which the screen frame 3 having the screen plate (press plate) 44 is placed is a first receiving bolt that is a receiving bolt at three locations. 53 and 53 and a second receiving bolt 54. The screen frame 3 is positioned and fixed with respect to the auxiliary frame 52 by the first receiving bolts 53 and 53 and the second receiving bolt 54. The auxiliary frame 52 can be adjusted to a desired position by the X-axis angle adjusting means 55, the Y1-axis angle adjusting means 56, and the Y2-axis angle adjusting means 57 on the apparatus main body side. Further, the auxiliary frame 52 has a plurality of clamps 58 that hold the screen frame 3 in a positioned state with respect to the auxiliary frame 52. On the other hand, as shown in FIGS. 18 and 19, the laser projector 45 is arranged on the apparatus main body side via an LM guide 59 and a rack guide 60, and is guided using a moving knob 61 connected to a moving pinion gear 63. And can be fixed using a fixing knob 62 at a desired position. Further, the laser projector 45 includes a projector 64 for the line pattern 46 in the X-axis direction and a projector 65 for the line pattern 47 in the Y-axis direction. They are arranged in parallel so that the angle can be adjusted, and can be fixed at a desired projection angle by using an angle fixing knob 67.

  Next, the operation of the above embodiment will be described. First, a first plate (first plate) printing (first color printing) is performed using a screen frame 3 having a screen plate (press plate) 44 for first color printing having a printing pattern and an alignment mark pattern. The printed materials supplied one by one from a stacking unit (not shown) for stacking the printed materials are front edge end portions on the feed board 16 by the conveying belt 14 of the conveying unit 4 arranged on the upstream side of the printing machine 1. Is conveyed until it comes into contact with the front register 10, and when the front edge is in contact with the front register 10, positioning of the substrate to be printed is performed and stopped (stopped state). Next, in this stopped state, the lateral register 11 performs positioning in the direction orthogonal to the conveyance direction of the printed material by pulling (or pushing) in the direction orthogonal to the conveyance direction of the printed material. . The printing cylinder 2 rotates and the first color printing is performed. At the time of the first color printing, the line pattern 46 in the X-axis direction and the line pattern 47 in the Y-axis direction from the laser projector 45 are aligned with the alignment mark pattern for forming the alignment mark 43, and the laser projector 45 The projection angles of the projector 64 for the line pattern 46 in the X-axis direction and the projector 65 for the line pattern 47 in the Y-axis direction are fixed (see FIGS. 9, 18, and 19). In this first color printing, alignment marks 43 (see FIG. 8) are printed on each substrate, and alignment is performed using the printed alignment marks 43 until the final process. The alignment mark pattern is attached to each screen plate (press plate) together with the printing pattern.

  When the first color printing is completed as described above, next, as a pre-preparation step for the second color printing, registration of alignment marks for the second color printing by dummy printing is performed using another new substrate. First, the screen frame 3 having the screen plate (printing plate) 44 for the first color printing is replaced with the screen frame 3 having the screen plate (printing plate) 44 for the second color printing. The alignment mark pattern of the screen plate (press plate) 44 for second color printing is projected from the X-axis direction line pattern 46 and the Y-axis direction line projected from the laser projector 45 whose position is fixed in the first color printing step. The screen frame 3 having the screen plate (press plate) 44 for second color printing is positioned and adjusted together with the auxiliary frame so as to be aligned with the pattern 47 (see FIGS. 9, 16, 17, etc.). By this adjustment, it is possible to prevent positional deviation between the screen plates at the time of plate change at the time of multicolor printing, and thus it is possible to prevent printing deviation at the time of multicolor printing.

  Next, this substrate (only one sheet) is stacked on a stacking unit (not shown). The stacked printed materials are conveyed from the stacking unit by the conveyance belt 14 of the conveyance unit 4 arranged on the upstream side of the printing machine 1 until the front edge end contacts the front registration unit 10 on the feed board 16. When the front edge is in contact with the front register 10, positioning in the transport direction of the substrate is performed and stopped (stopped state) (see FIG. 10). Next, in this stopped state, the lateral register 11 performs positioning in the direction orthogonal to the conveyance direction of the printed material by pulling (or pushing) in the direction orthogonal to the conveyance direction of the printed material. (See FIG. 11). Thereafter, the side register 11 is moved to a position where it does not interfere with the front register 10 (see FIG. 11). Next, at least a part of the lower surface of the printed material is adsorbed by the vacuum means 19, and the printed material is adsorbed and fixed on the vacuum surface 20 (adsorbed and fixed state) (see FIG. 12). Next, the printed material attracted and fixed on the vacuum surface 20 is slightly retreated (for example, about 0.5 to 1 mm) in the direction opposite to the conveying direction (retracting direction) (small movement) (see FIG. 12). . Thereafter, the gripper 8 grips the front end portion (front edge portion) of the printing material, and at the same time, the suction fixing by the vacuum means 19 is released, and the printing cylinder 2 is rotated to perform dummy printing. That is, the printing pattern for the second color and the alignment mark are printed on the substrate (FIG. 8 shows a state where only the alignment mark is printed for convenience). Then, the printed material on which the dummy printing is performed is discharged to a drying device (not shown) by the discharge belt 15 of the paper discharge unit 5 disposed on the downstream side of the printing press, and is dried by this drying device.

  After the drying is completed, the printed material on which dummy printing has been performed is loaded again on a stacking unit (not shown), and the stacked printed material is transported from the stacking unit to the upstream side of the printing machine 1. The transport belt 14 of the section 4 is transported on the feed board 16 until the front edge end comes into contact with the front registration section 10, and when the front edge end comes into contact with the front registration section 10, positioning of the substrate to be printed is performed. Then, it is stopped (stop state) (see FIG. 10). Next, in this stopped state, the lateral register 11 performs positioning in the direction orthogonal to the conveyance direction of the printed material by pulling (or pushing) in the direction orthogonal to the conveyance direction of the printed material. (See FIG. 11). Thereafter, the side register 11 is released to a position where it does not interfere (see FIG. 11). Next, at least a part of the lower surface of the printed material is adsorbed by the vacuum means 19, and the printed material is adsorbed and fixed on the vacuum surface 20 (adsorbed and fixed state) (see FIG. 12). Next, the printed material attracted and fixed on the vacuum surface 20 is slightly retreated (for example, about 1 to 2 mm) in the direction opposite to the conveyance direction (retracting direction) (small movement) (see FIG. 12). Thereafter, as shown in FIG. 14, the printing cylinder 2 is rotated in the counterclockwise direction indicated by an arrow 50 to release the front register 10, and a screen plate (printing plate) for second color printing is indicated in the direction indicated by the arrow 51. The screen frame having is moved to the printing end position together with the auxiliary frame. Next, the position of the image sensor 30 is adjusted so that the image sensor 30 is aligned with the alignment mark (see FIG. 13), calibration is performed (see FIG. 15), and this alignment mark is registered as a second color printing registration mark. To do. This registration is performed by a control means (not shown) connected to an image sensor or the like.

  After the alignment mark for second color printing is registered by dummy printing as described above, second color printing is performed as follows. First, the alignment mark pattern attached to the screen plate (printing plate) for the second color printing is closed by an appropriate means such as a tape. As a result, the alignment mark printed by the alignment mark pattern attached to the screen plate (printing plate) for the second color printing is not printed on the substrate on which the first color printing is printed. Next, the printed material on which the first color printing is printed is stacked on a stacking unit (not shown), and the leading edge on the feed board 16 by the transport belt 14 of the transport unit 4 arranged on the upstream side of the printing machine 1. The sheet is conveyed until the portion comes into contact with the front registering portion 10, and when the front edge end portion comes into contact with the front registering portion 10, positioning of the substrate to be printed is performed and stopped (stopped state). Next, in this stopped state, the lateral register 11 performs positioning in the direction orthogonal to the conveyance direction of the printed material by pulling (or pushing) in the direction orthogonal to the conveyance direction of the printed material. . Thereafter, the side register 11 is moved to a position where it does not interfere. Next, at least a part of the lower surface of the printing material is adsorbed by the vacuum means 19 and the printing material is adsorbed and fixed on the vacuum surface 20 (adsorption fixing state). Next, the printing material attracted and fixed on the vacuum surface 20 is slightly retreated (for example, about 0.5 to 1 mm) in the direction opposite to the conveyance direction (retracting direction) (minute movement). Next, the alignment mark of the substrate printed by the first color printing is aligned with the registration mark for second color printing. By this alignment process, the first color printing and the second color printing are prevented from shifting. After this alignment process, the gripper 8 grips the leading edge (front edge) of the printed material, and at the same time, the suction fixing by the vacuum means 19 is released, and the printing cylinder 2 rotates to perform the second color printing. Is called.

  In addition, the processes after the three-color printing are performed by registering the alignment mark for the second color printing by dummy printing (preparation process of the second color printing) and the second color printing process ( This printing step) is repeated.

  In the above-described embodiment, in addition to the positioning in both directions in the conveyance direction and the direction perpendicular to the conveyance direction by the front registration unit 10 and the side registration unit 11 (that is, positioning with reference to the front edge end of the printed material). Thus, the substrate can be positioned without being affected by the end surface finish of the front edge of the substrate, but the present invention is not limited to this, and the present invention is not limited to the front edge of the substrate. It is only possible to position the substrate without being affected by the end surface finish, or a switching mode is provided to perform positioning based on the leading edge of the substrate in this switching mode. It is also possible to select whether or not to perform positioning of the printed material that is not affected by the end surface finish of the front edge of the sheet.

1 Cylinder type screen printing machine 2 Printing cylinder (printing cylinder)
Reference Signs List 3 Screen frame 4 Conveying unit 5 Discharging unit 6 Central shaft 7 Concave portion 8 Gripper 9 Nail pad 10 Front registering unit 11 Side registering unit 12 Squeegee 13 Scraper 14 Conveying belt 15 Discharge belt 16 Feed board 17 Front register sensor 18 Side registering unit Unit 19 Vacuum means 20 Vacuum surface 21 Housing 22 Vacuum hose 23 Base plate 25 X alignment module 26 Y1 alignment module 27 Y2 alignment module 28 Holding roller 29 Brush roller 30 Image sensor 31 Illuminating means 32 Adjustment handle 33 Fixed handle 34 Y axis guide 35 X Axis guide 36 Lens 37 Side viewer attachment 38 X-axis fine adjustment unit 39 Y-axis fine adjustment unit 40 Z-axis fine adjustment unit 42 Printed object 43 Alignment mark 44 Screen plate (printing plate)
45 Laser projector 46 X-axis line pattern 47 Y-axis line pattern 50 Arrow 51 Arrow 52 Auxiliary frame 53 First receiving bolt 54 Second receiving bolt 55 X-axis angle adjusting means 56 Y1-axis angle adjusting means 57 Y2-axis angle Adjusting means 58 Clamp 59 LM guide 60 Rack guide 61 Moving knob 62 Fixed knob 63 Moving pinion gear 64 Projector 65 Projector 66 Angle adjustment stand 67 Angle fixing knob

Claims (5)

A cylinder-type screen printing machine having a printing cylinder and a printing plate for performing multicolor printing of two or more colors on a substrate,
The cylinder type screen printing machine has an upstream side of the printing cylinder,
An alignment stage that is driven by a multi-axis actuator for positioning the substrate;
A vacuum means attached to the alignment stage for adsorbing at least part of the lower surface of the substrate;
An image sensor for detecting the position of the substrate,
An alignment mark is printed on the substrate when the first color is printed, and the image sensor uses the registration mark registered on the basis of the printing plate position in the second and subsequent printing plates as the first color. A cylinder-type screen printing machine characterized in that each printing of the second and subsequent colors is performed by positioning the printing material in alignment with the alignment marks printed on the printing material during printing. The cylinder-type screen printing machine according to claim 1,
The cylinder type screen printing machine, wherein the vacuum means has a vacuum surface formed with a plurality of holes for adsorbing at least a part of the lower surface of the substrate. In the cylinder type screen printing machine according to claim 1 or 2,
The cylinder-type screen printing machine is characterized in that the positioning is performed in a state where the printing material is adsorbed and fixed on the vacuum surface. In the cylinder type screen printing machine according to any one of claims 1 to 3,
The cylinder type screen printing machine has a front register part and a side register part, and is a printer that performs positioning based on the front edge of the printed material by the front register part and the side register part. Cylinder type screen printing machine. 5. A printing method, wherein the printing material is positioned and printed using the cylinder type screen printing machine according to any one of claims 1 to 4.

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