Cylinder rolling screen printing device

Abstract

The utility model discloses a cylinder rolling screen printing device which comprises a three-dimensional space displacement unit. The bearing unit is arranged at the movable end of the three-axis space displacement unit, and a structure for placing a cylindrical workpiece is arranged on the bearing unit; the positioning control unit is arranged on the bearing unit and controls the cylindrical workpiece located in the containing structure on the bearing unit to rotate around the axis of the cylindrical workpiece. The screen frame unit is located over the bearing unit, and the screen frame face of the screen frame unit is parallel to the axis of the cylindrical workpiece placed in the bearing unit; the screen frame moving unit is connected with the screen frame unit and controls the screen frame unit to move along the plane where the screen frame surface is located; the moving direction of the screen frame moving unit is perpendicular to the axis of the cylindrical workpiece placed in the bearing unit. The working end of the ink scraping and returning unit is located over the screen frame unit in a lifting mode. By means of the structure unit, screen printing can be conducted on the surfaces of cylindrical workpieces stably and efficiently in batches.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece screen printing, and in particular to a cylindrical rolling screen printing device. Background Art

[0002] The surface printing methods of cylindrical workpieces include conventional spraying, roller brushing, screen printing and water transfer printing. Application No. 201910434647.8 discloses an automatic glazing device for the cylindrical surface of a cylindrical workpiece, including a glazing component, a clamping component, a calendering component and a bottom plate. The clamping component includes a chuck, which can move up and down in the vertical direction under the action of a first driving mechanism, and the first support and the second support are arranged on the left and right sides of the chuck. A workpiece fixture for positioning the workpiece is also provided directly below the chuck. The glaze box can be driven by the second driving mechanism arranged on the first support to move horizontally left and right to drive the coating roller to connect with one side of the cylindrical surface of the workpiece and coat it. The pressure roller mounting seat can be driven by the third driving mechanism arranged on the second support to move horizontally left and right to drive the pressure roller to connect with the other side of the cylindrical surface of the workpiece and calender it. It realizes thorough printing of the cylindrical surface of the workpiece by roller brush spraying. The overall structure of the equipment is relatively large, with many parts and components, and the use process is complicated, and it is impossible to achieve accurate pattern printing.

[0003] Application No. 202011141168.6 discloses an automatic liquid spraying device for cylindrical workpieces and an operation method thereof, wherein the front servo motor is mounted on the front motor mounting seat, the driving pulley is mounted on the output shaft of the front servo motor, the driven pulley is mounted in the mounting hole on the base through the first bearing, the bearing seat is mounted in the center hole of the first bearing, the rear servo motor is mounted on the rear motor mounting seat, the lower end of the ball screw is mounted in the mounting hole on the driven pulley through the second bearing, and the bottom of the ball screw is connected to the output shaft of the rear servo motor, the linear guide is mounted on the pillar, the slider is mounted on the linear guide, the slide seat is mounted on the slider, the nut is mounted on the ball screw, the swing arm is mounted on the top surface of the slide seat, and the nozzle is mounted in the mounting hole on the swing arm. It realizes the printing of precise patterns through the nozzle, and the spraying efficiency is relatively high, but compared with screen printing, its efficiency is low, and the cost of using and consumables is high, which is not suitable for mass production of the same model.

[0004] Most of the existing workpieces are screen-printed manually, which greatly increases the labor intensity of workers and reduces work efficiency. On the other hand, the pungent smell of the printing material greatly affects the health of workers and easily causes safety accidents. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a cylindrical rolling screen printing device and a structural unit, which can screen print the surface of a cylindrical workpiece in batches, stably and efficiently.

[0006] The purpose of the utility model is achieved through such technical solution:

[0007] A cylindrical rolling screen printing device, comprising:

[0008] Three-dimensional spatial displacement unit;

[0009] A supporting unit is arranged at the movable end of the three-axis spatial displacement unit, and a structure for placing a cylindrical workpiece is provided on the supporting unit;

[0010] A positioning control unit is arranged on the supporting unit to control the cylindrical workpiece in the placement structure on the supporting unit to rotate around its axis;

[0011] The screen frame unit is located directly above the supporting unit, and the screen frame surface of the screen frame unit is parallel to the axis of the cylindrical workpiece placed in the supporting unit;

[0012] A screen frame moving unit is connected to the screen frame unit and controls the screen frame unit to move along the plane where the screen frame surface is located; the moving direction of the screen frame moving unit is perpendicular to the axis of the cylindrical workpiece placed in the supporting unit;

[0013] The ink scraping and returning unit has a working end which can be raised and lowered and is located just above the screen frame unit.

[0014] Furthermore, the three-dimensional space displacement unit includes:

[0015] Z-axis lifting assembly, vertical setting;

[0016] The plane moving component is arranged on the lifting end of the Z-axis lifting component; and the supporting unit is arranged on the movable end of the plane moving component.

[0017] Furthermore, the Z-axis lifting assembly includes:

[0018] Vertical manual translation stage, vertical setting;

[0019] A vertical cylinder is arranged on the lifting end of the vertical manual position table, and a plane displacement component is arranged on the telescopic end thereof;

[0020] The plane displacement component is a plane manual displacement stage.

[0021] Furthermore, the supporting unit comprises:

[0022] The supporting platform is horizontally arranged on the movable end of the three-axis spatial displacement unit;

[0023] A roller assembly is arranged on the supporting platform, and the rotation axis of the roller assembly is perpendicular to the moving direction of the screen frame moving unit;

[0024] The end top rotating assembly is arranged on the supporting platform and is located on one side of the roller assembly;

[0025] The positioning control unit is arranged on the supporting platform, facing the end top rotating assembly; the positioning control unit and the end top rotating assembly clamp the cylindrical workpiece placed on the roller assembly, and the positioning control unit controls the cylindrical workpiece to rotate around its axis on the roller assembly.

[0026] Furthermore, the end top rotating assembly comprises:

[0027] The end top frame is arranged on the supporting platform and is located on one side of the roller assembly;

[0028] The end top piece has a rear end and an end top frame that can be rotatably arranged, and a head end is provided with an end top surface, and the head end of the end top piece faces the positioning control unit; the rotating shaft of the end top piece is perpendicular to the moving direction of the screen frame moving unit.

[0029] Furthermore, the roller assembly includes at least two groups of roller members that are arranged parallel to each other and spaced apart; the roller members include:

[0030] A roller support frame is arranged on a supporting platform;

[0031] Two rollers are rotatably arranged on the roller frame; the rotating shafts of the rollers are perpendicular to the moving direction of the screen frame moving unit; the axes of the section circles of the two rollers are located directly below the axis of the end top rotating assembly;

[0032] Furthermore, the positioning control unit includes:

[0033] The positioning cylinder is arranged on the supporting platform, and its axis is colinear with the axis of the end top rotating assembly;

[0034] The rotating sleeve is coaxially arranged on the telescopic end of the positioning cylinder and directly faces the end top rotating assembly.

[0035] Furthermore, the frame unit comprises:

[0036] A net frame is arranged on the moving end of the net frame moving unit; the opposite inner sides of the net frame are provided with C-shaped grooves;

[0037] The mesh plate has two opposite ends inserted into two C-shaped grooves of the mesh frame, and the mesh plate is fixed in the mesh frame through a spiral pressing head arranged on the C-shaped groove.

[0038] Furthermore, the ink scraping and ink returning unit comprises:

[0039] The ink scraping cylinder is vertically arranged just above the screen plate and fixedly connected to the fixed end of the screen frame moving unit;

[0040] The ink scraper plate is connected to the telescopic end of the ink scraper cylinder and faces the screen plate;

[0041] The ink return cylinder is vertically arranged just above the screen plate and fixedly connected to the fixed end of the screen frame moving unit;

[0042] The ink return plate is connected to the telescopic end of the ink return cylinder and faces the screen plate; a gap is left between the ink scraper plate and the ink return plate.

[0043] Furthermore, the ink scraping cylinder and the ink returning cylinder are fixedly connected to the fixed end of the screen frame moving unit through the mounting seat and two support rods; one end of the support rod is fixedly connected to the fixed end of the screen frame moving unit; the mounting seat is slidably covered on the two support rods; and a limit lock is provided on the support rod to fix the mounting seat and the support rod relatively;

[0044] The ink scraping cylinder and the ink return cylinder are vertically arranged on the mounting seat; the ink scraping cylinder and the ink return cylinder are connected to the ink scraping plate and the ink return plate respectively through two sets of connecting frames; the connecting frames include:

[0045] A crossbar connected to the telescopic end of the ink scraping cylinder;

[0046] The upper ends of the two guide rods are respectively connected with the cross rods, and the lower ends pass through the dark rotating frame and are connected with the ink scraping plate; the guide rods are connected with the mounting frame through linear bearings for guiding sliding.

[0047] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0048] 1. The mechanism for clamping and placing the cylindrical workpiece is provided with a three-dimensional controlled displacement to realize the adjustment of the cylindrical workpiece to any position and height, thereby realizing screen printing on cylindrical workpieces of different models and specifications, and selectively performing screen printing on partial areas of the cylindrical workpiece.

[0049] 2. The screen frame moving unit drives the screen frame unit to move, so that the screen frame unit and the surface of the cylindrical workpiece move synchronously, completing continuous printing on the cylindrical surface.

[0050] 3. The use of automated unit components can realize automated silk screen printing operations, greatly reducing the labor intensity of operators and improving operating efficiency; at the same time, ensuring the stability, reliability and consistency of silk screen printing.

[0051] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings of the present utility model are as follows:

[0053] Figure 1It is a schematic diagram of the three-dimensional structure of the cylindrical rolling screen printing device in the embodiment;

[0054] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0055] Figure 3 for Figure 1 The enlarged structural diagram at B in the middle;

[0056] Figure 4 It is a front view structural schematic diagram of a cylindrical rolling screen printing device in the embodiment;

[0057] Figure 5 for Figure 4 The enlarged structural diagram at C in the middle;

[0058] Figure 6 for Figure 4 The enlarged structural diagram at D in the middle;

[0059] Figure 7 for Figure 4 The enlarged structural diagram at E in the middle;

[0060] Figure 8 It is a left-side structural schematic diagram of a cylindrical rolling screen printing device in the embodiment;

[0061] Fig. 9 It is a schematic diagram of the top view of the cylindrical rolling screen printing device in the embodiment;

[0062] In the figure: 11. Z-axis lifting assembly; 111. Vertical manual translation stage; 112. Vertical cylinder; 12. Planar moving assembly; 21. Support platform; 221. Roller frame; 222. Roller; 231. End top frame; 232. End top piece; 31. Positioning cylinder; 32. Rotating sleeve; 41. Screen frame; 411. C-shaped groove; 42. Screen plate; 43. Screw press head; 5. Screen frame moving unit; 61. Ink scraping cylinder; 62. Ink scraping plate; 63. Ink return cylinder; 64. Ink return plate; 65. Mounting seat; 66. Support rod; 67. Cross bar; 68. Guide rod; 69. Linear bearing; 70. Limit lock; 7. Cylindrical workpiece. DETAILED DESCRIPTION

[0063] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0064] Example:

[0065] like Figures 1 to 9 As shown, a cylindrical rolling screen printing device includes:

[0066] Three-dimensional spatial displacement unit;

[0067] A supporting unit is arranged at the movable end of the three-axis spatial displacement unit, and a structure for placing the cylindrical workpiece 7 is provided on the supporting unit;

[0068] A positioning control unit is arranged on the supporting unit, and controls the cylindrical workpiece 7 placed in the structure on the supporting unit to rotate around its axis;

[0069] The screen frame unit is located directly above the supporting unit, and the screen frame surface of the screen frame unit is parallel to the axis of the cylindrical workpiece 7 placed in the supporting unit;

[0070] The screen frame moving unit 5 is connected to the screen frame unit to control the screen frame unit to move along the plane where its screen frame surface is located; the moving direction of the screen frame moving unit 5 is perpendicular to the axis of the cylindrical workpiece 7 placed in the supporting unit; the screen frame moving unit 5 can select a single-axis robot or a single-axis electric cylinder or a single-axis cylinder.

[0071] The ink scraping and returning unit has a working end which can be raised and lowered and is located just above the screen frame unit.

[0072] In this embodiment, the three-dimensional space displacement unit includes:

[0073] Z-axis lifting assembly 11, arranged vertically;

[0074] The plane moving component 12 is arranged on the lifting end of the Z-axis lifting component 11 ; the supporting unit is arranged on the movable end of the plane moving component 12 .

[0075] In this embodiment, the Z-axis lifting assembly 11 includes:

[0076] A vertical manual translation stage 111 is arranged vertically;

[0077] A vertical cylinder 112 is provided on the lifting end of the vertical manual position table, and a plane displacement component is provided on the telescopic end thereof;

[0078] The plane displacement component is a plane manual displacement stage.

[0079] The height of the supporting unit can be precisely controlled by the vertical manual translation stage 111, and specifically, the vertical manual translation stage 111 can be precisely positioned by quickly positioning the vertical cylinder 112. In this embodiment, the manual translation stage is a screw mechanism with a locking function. The planar manual translation stage is a stack of two layers of screw mechanisms with locking functions, and the moving directions are perpendicular to each other.

[0080] In this embodiment, the supporting unit includes:

[0081] The supporting platform 21 is horizontally arranged on the movable end of the three-axis spatial displacement unit;

[0082] The roller 222 assembly is arranged on the supporting platform 21, and the rotation axis of the roller 222 assembly is perpendicular to the moving direction of the screen frame moving unit 5;

[0083] The end top rotating assembly is arranged on the supporting platform 21 and is located on one side of the roller 222 assembly;

[0084] The positioning control unit is arranged on the support platform 21, facing the end top rotating assembly; the positioning control unit and the end top rotating assembly clamp the cylindrical workpiece 7 placed on the roller 222 assembly, and the positioning control unit controls the cylindrical workpiece 7 to rotate around its axis on the roller 222 assembly.

[0085] The roller 222 assembly can ensure that the cylindrical workpiece 7 can rotate smoothly during the screen printing process of the cylindrical workpiece 7, thereby achieving printing on its cylindrical surface.

[0086] In this embodiment, the end top rotating assembly includes:

[0087] The end support frame 231 is arranged on the support platform 21 and is located on one side of the roller 222 assembly;

[0088] The end top piece 232 is rotatably arranged with the end top frame 231 at its rear end, and an end top surface is arranged on its head end. The head end of the end top piece 232 faces the positioning control unit; the rotating shaft of the end top piece 232 is perpendicular to the moving direction of the screen frame moving unit 5.

[0089] This function can be achieved by installing the end top piece 232 in the end top frame 231 through a slewing bearing.

[0090] In this embodiment, the roller 222 assembly includes at least two groups of rollers 222 arranged parallel to each other and spaced apart; the rollers 222 include:

[0091] The roller support frame 221 is arranged on the supporting platform 21;

[0092] Two rollers 222 are rotatably arranged on the roller frame 221; the rotating shafts of the rollers 222 are perpendicular to the moving direction of the screen frame moving unit 5; the axes of the section circles of the two rollers 222 are located directly below the axis of the end top rotating assembly;

[0093] The roller support frame 221 can adjust the opening and closing degree of its frame according to the parameters such as the diameter of the specific cylindrical workpiece 7 to be printed, so as to realize the position control of the roller 222, so as to better support the cylindrical workpiece 7. The specific roller support frame 221 can adopt the structural form of a fixed rod plus two controllable angle outriggers.

[0094] In this embodiment, the positioning control unit includes:

[0095] The positioning cylinder 31 is arranged on the supporting platform 21, and its axis is colinear with the axis of the end top rotating assembly;

[0096] The rotating sleeve 32 is coaxially rotatably arranged on the telescopic end of the positioning cylinder 31 and directly faces the end top rotating assembly.

[0097] In this embodiment, the frame unit includes:

[0098] The net frame 41 is arranged on the moving end of the net frame moving unit 5; the opposite inner sides of the net frame 41 are provided with C-shaped grooves 411;

[0099] The mesh plate 42 has two opposite ends inserted into two C-shaped grooves 411 of the mesh frame 41 , and the mesh plate 42 is fixed in the mesh frame 41 by a screw press 43 arranged on the C-shaped grooves 411 .

[0100] In this embodiment, the ink scraping and ink returning unit comprises:

[0101] The ink scraping cylinder 61 is vertically arranged just above the screen plate 42 and fixedly connected to the fixed end of the screen frame moving unit 5;

[0102] The ink scraping plate 62 is connected to the telescopic end of the ink scraping cylinder 61 and faces the screen plate 42;

[0103] The ink return cylinder 63 is vertically arranged just above the screen plate 42 and fixedly connected to the fixed end of the screen frame moving unit 5;

[0104] The ink return plate 64 is connected to the telescopic end of the ink return cylinder 63 and faces the screen plate 42 ; a gap is left between the ink scraper plate 62 and the ink return plate 64 .

[0105] In this embodiment, the ink scraping cylinder 61 and the ink returning cylinder 63 are fixedly connected to the fixed end of the screen frame moving unit 5 through the mounting seat 65 and two support rods 66; one end of the support rod 66 is fixedly connected to the fixed end of the screen frame moving unit 5; the mounting seat 65 is slidably covered on the two support rods 66; the support rods 66 are provided with limit lock buckles 69 to relatively fix the mounting seat 65 and the support rods 66;

[0106] The ink scraping cylinder 61 and the ink return cylinder 63 are vertically arranged on the mounting seat 65; the ink scraping cylinder 61 and the ink return cylinder 63 are respectively connected to the ink scraping plate 62 and the ink return plate 64 through two sets of connecting frames; the connecting frames include:

[0107] A crossbar 67 connected to the telescopic end of the ink scraping cylinder 61;

[0108] The two guide rods 68 have upper ends connected to the crossbars 67 respectively, and lower ends passing through the dark rotating frame to be connected to the ink scraper 62; the guide rods 68 are connected to the mounting frame for guiding sliding through linear bearings (not shown in the figure).

[0109] The setting of the support rod 66 realizes the control of the position of the mounting frame, thereby realizing the position control of the ink scraper plate 62 and the ink return plate 64 on the screen plate 42; by adopting the connecting frame structure, the lateral force exerted on the ink return plate 64 and the ink scraper plate 62 can be transmitted to the fixed structure rather than the shaft of the ink return cylinder 63 and the ink scraper cylinder 61.

[0110] In this embodiment, the cylindrical rolling screen printing device is used as follows: according to the size of the cylindrical workpiece 7 to be printed, the height of the support platform 21 (based on the close contact between the surface of the cylindrical workpiece 7 and the lower surface of the screen 42) and the position on the horizontal plane are adjusted by the three-dimensional spatial displacement unit, and the appropriate end top piece 232 and rotating sleeve 32 are selected.

[0111] The vertical cylinder 112 is controlled to be lowered to a predetermined height, and then the cylindrical workpiece 7 to be printed is placed on the roller 222 . The positioning cylinder 31 is controlled to extend to squeeze the two ends of the cylindrical workpiece 7 onto the rotating sleeve 32 and the end top piece 232 .

[0112] Add screen printing pigment to the screen plate 42, control the ink scraping cylinder 61 to retract so that the lower end of the ink scraping plate 62 is away from the upper surface of the screen plate 42, control the ink return cylinder 63 to extend so that the lower end of the ink return plate 64 is against the upper surface of the screen plate 42, and control the screen frame moving unit 5 to move to the left so that the screen printing pigment is coated on the upper surface of the screen plate 42.

[0113] The vertical cylinder 112 is controlled to reset, and the surface of the cylindrical workpiece 7 is now in close contact with the lower surface of the screen 42. Then the ink scraping cylinder 61 is controlled to extend so that the lower end of the ink scraping plate 62 is against the upper surface of the screen 42, and the ink return cylinder 63 is controlled to shorten so that the lower end of the ink return plate 64 is away from the upper surface of the screen 42. Then the screen frame moving unit 5 is controlled to move rightward, so that the cylindrical workpiece rolls clockwise under the pressure of the screen 42, and the synchronous ink scraping plate 62 squeezes the screen printing pigment in the screen 42 through the mesh to the surface of the cylindrical workpiece, thus completing the screen printing. Then the vertical cylinder 112 is controlled to shorten, and the positioning cylinder 31 is controlled to shorten at the same time to take out the printed cylindrical workpiece.

[0114] Repeat the above steps to achieve continuous and repeated printing.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A cylindrical rolling screen printing device, characterized in that: include, Three-dimensional spatial displacement unit; A supporting unit is arranged at the movable end of the three-axis spatial displacement unit, and a structure for placing a cylindrical workpiece is provided on the supporting unit; A positioning control unit is arranged on the supporting unit to control the cylindrical workpiece in the placement structure on the supporting unit to rotate around its axis; The screen frame unit is located directly above the supporting unit, and the screen frame surface of the screen frame unit is parallel to the axis of the cylindrical workpiece placed in the supporting unit; A screen frame moving unit is connected to the screen frame unit and controls the screen frame unit to move along the plane where the screen frame surface is located; the moving direction of the screen frame moving unit is perpendicular to the axis of the cylindrical workpiece placed in the supporting unit; The ink scraping and returning unit has a working end which can be raised and lowered and is located just above the screen frame unit.

2. The cylindrical rolling screen printing device according to claim 1, characterized in that: The three-dimensional space displacement unit comprises: Z-axis lifting assembly, vertical setting; The plane moving component is arranged on the lifting end of the Z-axis lifting component; and the supporting unit is arranged on the movable end of the plane moving component.

3. The cylindrical rolling screen printing device according to claim 2, characterized in that: The Z-axis lifting assembly comprises: Vertical manual translation stage, vertical setting; A vertical cylinder is arranged on the lifting end of the vertical manual position table, and a plane displacement component is arranged on the telescopic end thereof; The plane displacement component is a plane manual displacement stage.

4. The cylindrical rolling screen printing device according to claim 1, characterized in that: The supporting unit comprises: The supporting platform is horizontally arranged on the movable end of the three-axis spatial displacement unit; A roller assembly is arranged on the supporting platform, and the rotation axis of the roller assembly is perpendicular to the moving direction of the screen frame moving unit; The end top rotating assembly is arranged on the supporting platform and is located on one side of the roller assembly; The positioning control unit is arranged on the supporting platform, facing the end top rotating assembly; the positioning control unit and the end top rotating assembly clamp the cylindrical workpiece placed on the roller assembly, and the positioning control unit controls the cylindrical workpiece to rotate around its axis on the roller assembly.

5. The cylindrical rolling screen printing device according to claim 4, characterized in that: The end top rotating assembly comprises: The end top frame is arranged on the supporting platform and is located on one side of the roller assembly; The end top piece has a rear end and an end top frame that can be rotatably arranged, and a head end is provided with an end top surface, and the head end of the end top piece faces the positioning control unit; the rotating shaft of the end top piece is perpendicular to the moving direction of the screen frame moving unit.

6. The cylindrical rolling screen printing device according to claim 4, characterized in that: The roller assembly comprises at least two groups of roller members arranged parallel to each other and spaced apart; the roller members comprise: A roller support frame is arranged on a supporting platform; Two rollers are rotatably arranged on the roller frame; the rotating shafts of the rollers are perpendicular to the moving direction of the screen frame moving unit; the axes of the section circles of the two rollers are located directly below the axis of the end top rotating assembly.

7. The cylindrical rolling screen printing device according to claim 4, characterized in that: The positioning control unit comprises: The positioning cylinder is arranged on the supporting platform, and its axis is colinear with the axis of the end top rotating assembly; The rotating sleeve is coaxially arranged on the telescopic end of the positioning cylinder and directly faces the end top rotating assembly.

8. The cylindrical rolling screen printing device according to claim 1, characterized in that: The frame unit comprises: A net frame is arranged on the moving end of the net frame moving unit; the opposite inner sides of the net frame are provided with C-shaped grooves; The mesh plate has two opposite ends inserted into two C-shaped grooves of the mesh frame, and the mesh plate is fixed in the mesh frame through a spiral pressing head arranged on the C-shaped groove.

9. The cylindrical rolling screen printing device according to claim 1, characterized in that: The ink scraping and returning unit comprises: The ink scraping cylinder is vertically arranged just above the screen plate and fixedly connected to the fixed end of the screen frame moving unit; The ink scraper plate is connected to the telescopic end of the ink scraper cylinder and faces the screen plate; The ink return cylinder is vertically arranged just above the screen plate and fixedly connected to the fixed end of the screen frame moving unit; The ink return plate is connected to the telescopic end of the ink return cylinder and faces the screen plate; a gap is left between the ink scraper plate and the ink return plate.

10. The cylindrical rolling screen printing device according to claim 9, characterized in that: The ink scraping cylinder and the ink returning cylinder are fixedly connected to the fixed end of the screen frame moving unit through the mounting seat and two supporting rods; one end of the supporting rod is fixedly connected to the fixed end of the screen frame moving unit; the mounting seat is slidably covered on the two supporting rods; the supporting rods are provided with limit lock buckles to relatively fix the mounting seat and the supporting rods; The ink scraping cylinder and the ink return cylinder are vertically arranged on the mounting seat; the ink scraping cylinder and the ink return cylinder are connected to the ink scraping plate and the ink return plate respectively through two sets of connecting frames; the connecting frames include: A crossbar connected to the telescopic end of the ink scraping cylinder; The upper ends of the two guide rods are respectively connected with the cross rods, and the lower ends pass through the dark rotating frame and are connected with the ink scraping plate; the guide rods are connected with the mounting frame through linear bearings for guiding sliding.

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