Environment-friendly vest pocket surface printing machine

Abstract

The utility model relates to the technical field of printing, in particular to an environment-friendly vest pocket surface printing machine which comprises a base and supporting legs, the lower end of the base is fixedly connected with the multiple supporting legs, a vest pocket moving structure is arranged in a second shell, the outer wall of a first bent block is fixedly connected with a first electric telescopic rod, and the outer wall of a second bent block is fixedly connected with a second electric telescopic rod. Through cooperation of a vest bag moving structure and a second shell, an output shaft of a first motor rotates to drive a second disc to rotate, an intermittent reciprocating conveying mode can reduce displacement of environment-friendly vest bags in the printing process, the risk of deviation of printed patterns is reduced, the working efficiency of the environment-friendly vest bag surface printing machine is improved, and the printing quality of the environment-friendly vest bag surface printing machine is improved. Through cooperation of the tension adjusting structure and the first shell, the first disc rotates to drive the first bevel gear to rotate, it is ensured that the environment-friendly vest pocket is kept flat in the printing process, the tension can be changed to meet different requirements during printing, and therefore the limitation of the environment-friendly vest pocket surface printing machine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to an environmentally friendly vest bag surface printing machine. Background Art

[0002] Special printing of plastic packaging bags refers to other printing methods that are different from traditional printing methods, including inkjet printing, gold and silver ink printing, barcode printing, liquid crystal printing, magnetic printing, pearlescent printing, hot stamping electrochemical aluminum, etc.

[0003] For example, an environmentally friendly vest bag surface printing machine with the authorization announcement number "CN221272341U" drives the smoothing rollers on the left and right sides to move synchronously as the movable plate moves downward. When the smoothing rollers contact the surface of the vest plastic bag, they roll to both sides, thereby smoothing the surface of the vest plastic bag and preventing wrinkles on the vest plastic bag that affect the quality of the printing. However, when the printing machine prints the environmentally friendly vest bag, the telescopic cylinder drives the movable plate downward, and the plastic bag is subjected to external force. The uneven friction of the conveying rollers will cause the vest plastic bag to shift, resulting in a reduction in the working quality of the environmentally friendly vest bag surface printing machine. At the same time, the adaptability of the environmentally friendly vest bag surface printing machine to vest plastic bags of different materials and thicknesses is limited. Different plastic bags require different tensions when printing to ensure the best printing effect, which increases the limitations of the printing machine. Utility Model Content

[0004] The purpose of the utility model is to solve the problems that when the printing machine prints the environmentally friendly vest bag, the vest plastic bag is displaced, resulting in a decrease in the working quality of the environmentally friendly vest bag surface printing machine and its adaptability to vest plastic bags of different materials and thicknesses is limited. Different plastic bags require different tensions during printing to ensure the best printing effect, which makes the printing machine have limitations. The utility model proposes an environmentally friendly vest bag surface printing machine.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An environmentally friendly vest bag surface printing machine is designed, including a base and supporting legs. The lower end of the base is fixedly connected to a plurality of supporting legs. The right end of the left supporting leg is fixedly connected to a first shell through a protrusion. A tension adjustment structure is provided inside the first shell. A second shell is provided inside the base. A vest bag moving structure is provided inside the second shell. A first bending block is fixedly connected to the left side of the rear end of the base. A first electric telescopic rod is fixedly connected to the outer wall of the first bending block. The output end of the first electric telescopic rod is fixedly connected to a rectangular frame.

[0007] Preferably, the tension adjustment structure includes a first disc, an outer wall of the first disc is rotatably connected to the first shell through a bearing, the rotating shaft of the first disc is fixedly connected to the first bevel gear, the first bevel gear is meshingly connected to the second bevel gear, the lower end of the rotating shaft of the second bevel gear is rotatably connected to the first shell through a bearing, the upper end of the rotating shaft of the second bevel gear is fixedly connected to the threaded rod, the upper end of the rotating shaft of the threaded rod is rotatably connected to the first shell through a bearing, the threaded rod is threadedly connected to the nut, the left end of the nut slides on the sliding rod processed in the first shell, the right end of the nut is fixedly connected to the vertical rod, the outer wall of the vertical rod is slidably connected to the first shell, and the upper end of the vertical rod is fixedly connected to a support plate.

[0008] Preferably, the inner wall of the rectangular frame is rotatably connected to the first circular roller via a bearing, and the inner wall of the base is rotatably connected to the second circular roller via a bearing.

[0009] Preferably, the vest bag moving structure includes a first motor, the outer wall of the first motor is fixedly connected to the second shell, the output shaft of the first motor is rotatably connected to the second shell through a bearing, the output shaft of the first motor is fixedly connected to the second disc, the protrusion of the second disc is fitted with the cylinder, the end of the cylinder is fixedly connected to the third disc, the rotating shaft of the third disc is fixedly connected to the gear, both ends of the gear rotating shaft are rotatably connected to the second shell through bearings, the gear is meshed with the rack, the rack is slidably connected to the round rod processed in the second shell through the protrusion at the lower end, the left end of the rack is fixedly connected to the cross bar, and the cross bar is slidably connected to the protrusion processed in the second shell and the second shell respectively.

[0010] Preferably, the left end of the cross bar is fixedly connected to the third shell, the upper end of the third shell is fixedly connected to the second motor, the output shaft of the second motor is fixedly connected to the stud, both ends of the stud are rotatably connected to the third shell through bearings, the stud is threadedly connected to the threaded block, and the threaded block is slidingly connected to the vertical rod processed in the third shell through the protrusion at the right end, the left end of the threaded block is fixedly connected to the clamping block, and the outer wall of the clamping block is slidably connected to the third shell.

[0011] Preferably, the rear end of the base is fixedly connected to a second bent block, the outer wall of the second bent block is fixedly connected to the second electric telescopic rod, the output end of the second electric telescopic rod is installed with a printing mold, the rear end of the base is fixedly connected to a third bent block, the upper end of the third bent block is fixedly connected to the third motor, the output shaft of the third motor is rotatably connected to the third bent block through a bearing, and the output shaft of the third motor is installed with fan blades.

[0012] The utility model proposes an environmentally friendly vest bag surface printing machine, which has the following beneficial effects: through the cooperation of the vest bag moving structure and the second shell, the output shaft of the first motor rotates to drive the second disc to rotate, the rotation of the second disc drives the cylinder to rotate through its own protrusion, the rotation of the cylinder drives the third disc to rotate, the rotation of the third disc drives the gear to rotate, the rotation of the gear drives the rack to slide in the second shell through the protrusion at the lower end, the sliding of the rack drives the cross bar to move, the output shaft of the first motor rotates to drive the cross bar to move back and forth intermittently, and the intermittent reciprocating conveying method can reduce the displacement of the environmentally friendly vest bag during the printing process, reduce the risk of deviation in the printing pattern, and improve the working efficiency of the environmentally friendly vest bag surface printing machine.

[0013] Through the cooperation of the tension adjustment structure and the first shell, the rotation of the first disc drives the rotation of the first bevel gear, the rotation of the first bevel gear drives the rotation of the second bevel gear, the rotation of the second bevel gear drives the rotation of the threaded rod, and the rotation of the threaded rod drives the threaded block to slide on the slide rod processed on the first shell through the protrusion at the left end, so that the vertical rod drives the support plate to move, and the rotation of the first disc drives the support plate to move, so as to ensure that the environmentally friendly vest bag remains flat during the printing process, so that the tension can be changed to meet different needs during printing, thereby reducing the limitations of the surface printing machine of the environmentally friendly vest bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 Front cross-sectional view of

[0016] Figure 3 for Figure 2 A partial front cross-sectional view of the second shell;

[0017] Figure 4 for Figure 3 Left sectional view of

[0018] Figure 5 for Figure 1 A front cross-sectional view of the tension adjustment structure;

[0019] Figure 6 for Figure 2 A partial front cross-sectional view of the third shell;

[0020] Figure 7 It is a stereogram of the second disk, the cylinder, and the third disk;

[0021] Figure 8 This is a three-dimensional diagram of the third disk and cylinder.

[0022] In the figure: 1. base, 2. supporting leg, 3. first shell, 4. tension adjustment structure, 401. first disc, 402. first bevel gear, 403. second bevel gear, 404. threaded rod, 405. nut, 406. vertical rod, 407. support plate, 5. second shell, 6. vest bag moving structure, 601. first motor, 602. second disc, 603. third disc, 604. cylinder, 605. gear, 606. rack, 607. cross bar, 7. fan blade, 8. third shell, 9. second motor, 10. stud, 11. threaded block, 12. clamping block, 13. first bent plate, 14. first electric telescopic rod, 15. rectangular frame, 16. first round roller, 17. second round roller, 18. second bent block, 19. second electric telescopic rod, 20. printing mold, 21. third bent block, 22. third motor. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] Refer to the attached Figure 1-8 In this embodiment, an environmentally friendly vest bag surface printing machine includes a base 1 and support legs 2. The lower end of the base 1 is fixedly connected to multiple support legs 2. The right end of the left support leg 2 is fixedly connected to a first shell 3 through a protrusion. The first shell 3 is provided with a tension adjustment structure 4 inside. The base 1 is provided with a second shell 5 inside. The second shell 5 is provided with a vest bag moving structure 6 inside.

[0025] A first curved block 13 is fixedly connected to the left side of the rear end of the base 1, and a first electric telescopic rod 14 is fixedly connected to the outer wall of the first curved block 13. The model of the first electric telescopic rod 14 is selected according to actual needs and can be selected to meet work needs. The output end of the first electric telescopic rod 14 is fixedly connected to the rectangular frame 15. The output end of the first electric telescopic rod 14 moves to drive the rectangular frame 15 to move. The inner wall of the rectangular frame 15 is rotatably connected to the first circular roller 16 through a bearing. The first circular roller 16 rotates in the rectangular frame 15 through the bearing. The inner wall of the base 1 is rotatably connected to the second circular roller 17 through a bearing. The second circular roller 17 rotates in the base 1 through the bearing.

[0026] The left end of the crossbar 607 is fixedly connected to the third housing 8. The movement of the crossbar 607 drives the third housing 8 to move. The upper end of the third housing 8 is fixedly connected to the second motor 9. The model of the second motor 9 is selected according to actual needs and can be selected to meet the working needs. The output shaft of the second motor 9 is fixedly connected to the stud 10. The rotation of the output shaft of the second motor 9 drives the stud 10 to rotate.

[0027] Both ends of the stud 10 are rotatably connected to the third housing 8 through bearings. The stud 10 rotates in the third housing 8 through the bearings. The stud 10 is threadedly connected to the threaded block 11. The rotation of the stud 10 drives the threaded block 11 to move. The threaded block 11 is slidably connected to the vertical rod processed in the third housing 8 through the protrusion at the right end. The threaded block 11 slides on the vertical rod processed in the third housing 8 through the protrusion at the right end.

[0028] The left end of the threaded block 11 is fixedly connected to the clamping block 12. The movement of the threaded block 11 drives the clamping block 12 to move. The outer wall of the clamping block 12 is slidably connected to the third shell 8. The clamping block 12 slides in the third shell 8. The rear end of the base 1 is fixedly connected to the second bent block 18. The outer wall of the second bent block 18 is fixedly connected to the second electric telescopic rod 19. The model of the second electric telescopic rod 19 is selected according to actual needs and can be selected to meet work needs.

[0029] The output end of the second electric telescopic rod 19 is equipped with a printing mold 20. The movement of the output end of the second electric telescopic rod 19 drives the printing mold to move. The rear end of the base 1 is fixedly connected to a third bending block 21. The outer wall of the third bending block 21 is equipped with a heating block. The heating block is composed of a resistance wire and a switch. The upper end of the third bending block 21 is fixedly connected to a third motor 22. The third motor 22 is a servo motor.

[0030] The output shaft of the third motor 22 is rotatably connected to the third bending block 21 through a bearing. The output shaft of the third motor 22 rotates in the third bending block 21 through a bearing. The output shaft of the third motor 22 is equipped with fan blades 7. The rotation of the output shaft of the third motor 22 drives the fan blades 7 to rotate.

[0031] Refer to the attached Figure 1 、 Figure 2 and Figure 5 The tension adjustment structure 4 includes a first disc 401, the outer wall of the first disc 401 is rotatably connected to the first housing 3 via a bearing, a handle is installed on the outer wall of the first disc 401, the first disc 401 rotates within the first housing 3 via the bearing, the rotating shaft of the first disc 401 is fixedly connected to the first bevel gear 402, and the rotation of the first disc 401 drives the first bevel gear 402 to rotate;

[0032] The first bevel gear 402 is meshed with the second bevel gear 403. The rotation of the first bevel gear 402 drives the second bevel gear 403 to rotate. The number of teeth of the first bevel gear 402 is twice that of the second bevel gear 403. The lower end of the rotating shaft of the second bevel gear 403 is rotatably connected to the first housing 3 through a bearing. The second bevel gear 403 rotates on the first housing 3 through a bearing. The upper end of the rotating shaft of the second bevel gear 403 is fixedly connected to the threaded rod 404. The rotation of the second bevel gear 403 drives the threaded rod 404 to rotate. The upper end of the rotating shaft of the threaded rod 404 is rotatably connected to the first housing 3 through a bearing. The threaded rod 404 rotates in the first housing 3 through a bearing. The threaded rod 404 is threadedly connected to the nut 405. The rotation of the threaded rod 404 drives the nut 405 to move. The left end of the nut 405 slides on the slide rod processed in the first housing 3, and the nut 405 slides on the slide rod processed in the first housing 3;

[0033] The right end of the nut 405 is fixedly connected to the vertical rod 406. The movement of the nut 405 drives the vertical rod 406 to move. The outer wall of the vertical rod 406 is slidingly connected to the first shell 3. The vertical rod 406 slides in the first shell 3. The upper end of the vertical rod 406 is fixedly connected to the support plate 407. The movement of the vertical rod 406 drives the support plate 407 to move.

[0034] Refer to the attached Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 and Figure 8 : The vest bag moving structure 6 includes a first motor 601, the outer wall of the first motor 601 is fixedly connected to the second shell 5, the first motor 601 is a servo motor, the output shaft of the first motor 601 is rotatably connected to the second shell 5 through a bearing, and the output shaft of the first motor 601 rotates within the second shell 5 through a bearing;

[0035] The output shaft of the first motor 601 is fixedly connected to the second disc 602. The rotation of the output shaft of the first motor 601 drives the second disc 602 to rotate. The protrusion of the second disc 602 fits into the cylinder 604. The rotation of the second disc 602 drives the cylinder 604 to rotate through its own protrusion. The end of the cylinder 604 is fixedly connected to the third disc 603. The rotation of the cylinder 604 drives the third disc 603 to rotate.

[0036] The rotating shaft of the third disk 603 is fixedly connected to the gear 605. The rotation of the third disk 603 drives the gear 605 to rotate. Both ends of the rotating shaft of the gear 605 are rotatably connected to the second housing 5 through bearings. The gear 605 rotates within the second housing 5 through the bearings. The gear 605 is meshed with the rack 606. The rotation of the gear 605 drives the rack 606 to move.

[0037] The rack 606 is slidably connected to the round rod processed in the second shell 5 through the protrusion at the lower end. The rack 606 slides on the round rod processed in the second shell 5 through the protrusion at the lower end. The left end of the rack 606 is fixedly connected to the cross bar 607. The sliding of the rack 606 drives the cross bar 607 to move. The cross bar 607 is slidably connected to the protrusion processed in the second shell 5 and the second shell 5 respectively. The cross block 607 slides on the protrusion processed in the second shell 5 and slides in the second shell 5.

[0038] Working principle:

[0039] Printing of eco-friendly vest bags:

[0040] The placement stage of the eco-friendly vest bag:

[0041] The operator places the uncut eco-friendly vest bag on the second round roller 17, starts the first electric telescopic rod 14, and the output end of the first electric telescopic rod 14 moves to drive the rectangular frame 15 to move, and the rectangular frame 15 moves to drive the first round roller 16 to move downward (as shown in FIG. Figure 2 ) until the outer wall of the first round roller 16 is tightly against the eco-friendly vest bag, the first electric telescopic rod 14 is closed. Due to the clamping of the eco-friendly vest bag by the first round roller 16 and the second round roller 17, the eco-friendly vest bag will not be wrinkled during the transportation process;

[0042] Connect the external power supply of the first motor 601, start the first motor 601, and the output shaft of the first motor 601 rotates clockwise to drive the second disc 602 to rotate (as shown in FIG. Figure 4 ), the second disc 602 rotates and drives the cylinder 604 to rotate through its own protrusion, the cylinder 604 rotates and drives the third disc 603 to rotate, the third disc 603 rotates and drives the gear 605 to rotate, the gear 605 rotates and drives the rack 606 to slide in the second housing 5 through the protrusion at the lower end. Since the second disc 602 is in an eccentric position of the third disc 603, when the second disc 602 rotates the third disc 603 to the highest point, the protrusion of the second disc 602 no longer fits the cylinder 604 on the third disc 603, and the second disc 602 rotates again (as shown in FIG. Figure 3 ) position, the third disc 603 can be rotated again, so that the rotation of the second disc 602 drives the third disc 603 to rotate intermittently, the sliding of the rack 606 drives the cross bar 607 to make intermittent reciprocating motion, and the movement of the cross bar 607 drives the third shell 8 to move, thereby driving the two clamping blocks 12 in the third shell 8 to move, until the clamping blocks 12 move to the environmentally friendly vest bag, and then the first motor 601 is turned off;

[0043] Connect the external power supply of the second motor 9 and start the second motor 9. The output shaft of the second motor 9 rotates to drive the stud 10 to rotate. The rotation of the stud 10 drives the threaded block 11 to move. The movement of the threaded block 11 drives the two clamping blocks 12 to move relative to each other until the inner wall of the clamping block 12 is tightly against the eco-friendly vest bag. Then, turn off the second motor 9 to complete the clamping of the eco-friendly vest bag.

[0044] The printing stage of the eco-friendly vest bag;

[0045] Start the first motor 601, the output shaft of the first motor 601 rotates counterclockwise, and the first motor 601 moves the eco-friendly vest bag to the right in the above manner until the rightmost end of the eco-friendly vest bag moves out of the rightmost end of the support plate 407, and the handle on the first disc 401 is turned. The first disc 401 rotates and drives the first bevel gear 402 to rotate (as shown in FIG. Figure 5 ), the first bevel gear 402 rotates to drive the second bevel gear 403 to rotate. Since the number of teeth of the first bevel gear 402 is twice that of the second bevel gear 403, it is more labor-saving and easy to turn the handle. The rotation of the second bevel gear 403 drives the threaded rod 404 to rotate. The rotation of the threaded rod 404 drives the left end of the threaded block 405 to slide on the slide rod processed by the first shell 3, so that the vertical rod 406 drives the supporting plate 407 to move upward. The more the supporting plate 407 moves upward, the tighter the environmentally friendly vest bag is. When the environmentally friendly vest bag reaches the required tension, stop rotating the handle on the first turntable 401 to complete the tension adjustment of the environmentally friendly vest bag;

[0046] Start the second electric telescopic rod 19, the output end of the second electric telescopic rod 19 moves to drive the printing mold 20 to move downward, and the printing mold 20 presses the environmentally friendly vest bag downward. Due to the self-locking characteristics of the threaded rod 404, the support plate 407 will not move downward due to the downward pressure of the printing mold 20, and the support plate 407 plays a limiting role for the environmentally friendly vest bag when the printing mold 20 presses down. After the printing is completed, the output end of the second electric telescopic rod 19 moves to drive the printing mold 20 to move upward. At this time, the protrusion on the second disc 602 is raised again. The third motor 22 contacts the cylinder 604 on the third disc 603 for the second time, and the environmentally friendly vest bag moves to the right to under the fan blade 7 through the above connection method, and the heating block on the third bending block 21 is started. The heating block is composed of a resistance wire and a switch. The heating block generates heat, and the external power supply of the third motor 22 is connected. The third motor 22 is started, and the output shaft of the third motor 22 rotates to drive the fan blade 7 to rotate, so that the fan blade 7 blows hot air to the environmentally friendly vest bag, thereby drying the print on the environmentally friendly vest bag, avoiding blurring of the paint flow, and completing the printing on the environmentally friendly vest bag.

[0047] The stage of taking out the eco-friendly vest bag;

[0048] Repeat the above operation until the printing of the environmentally friendly vest bag is completed, start the third motor 8, and the third motor 8 moves the two clamping blocks 12 in the opposite direction of the above movement direction. The third motor 8 uses the above connection method to move the two clamping blocks 12 away from the environmentally friendly vest bag, turn off the third motor 8, rotate the handle on the first disc 401 in the opposite direction, and the first disc 401 moves the support plate 407 back to its original position in the above method, start the first point electric telescopic rod 14, and the output end of the first electric telescopic rod 14 moves to drive the first round roller 16 back to its original position, take out the printed environmentally friendly vest bag, and turn off the first electric telescopic rod 14 to complete the processing of the environmentally friendly vest bag surface printing machine.

[0049] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. An environmentally friendly vest bag surface printing machine, comprising a base (1) and support legs (2), wherein the lower end of the base (1) is fixedly connected to a plurality of support legs (2), characterized in that: The right end of the left support leg (2) is fixedly connected to a first shell (3) through a protrusion, a tension adjustment structure (4) is provided inside the first shell (3), a second shell (5) is provided inside the base (1), a vest bag moving structure (6) is provided inside the second shell (5), a first bent block (13) is fixedly connected to the left side of the rear end of the base (1), a first electric telescopic rod (14) is fixedly connected to the outer wall of the first bent block (13), and an output end of the first electric telescopic rod (14) is fixedly connected to a rectangular frame (15).

2. The environmentally friendly vest bag surface printing machine according to claim 1, characterized in that: The tension adjustment structure (4) comprises a first disc (401), the outer wall of the first disc (401) is rotatably connected to the first housing (3) via a bearing, the rotation shaft of the first disc (401) is fixedly connected to the first bevel gear (402), the first bevel gear (402) is meshedly connected to the second bevel gear (403), the lower end of the rotation shaft of the second bevel gear (403) is rotatably connected to the first housing (3) via a bearing, and the upper end of the rotation shaft of the second bevel gear (403) is fixedly connected to the threaded rod. (404) is fixedly connected, the upper end of the rotating shaft of the threaded rod (404) is rotatably connected to the first shell (3) through a bearing, the threaded rod (404) is threadedly connected to the nut (405), the left end of the nut (405) slides on a sliding rod processed in the first shell (3), the right end of the nut (405) is fixedly connected to the vertical rod (406), the outer wall of the vertical rod (406) is slidably connected to the first shell (3), and the upper end of the vertical rod (406) is fixedly connected to a support plate (407).

3. The environmentally friendly vest bag surface printing machine according to claim 1, characterized in that: The inner wall of the rectangular frame (15) is rotatably connected to the first round roller (16) via a bearing, and the inner wall of the base (1) is rotatably connected to the second round roller (17) via a bearing.

4. The environmentally friendly vest bag surface printing machine according to claim 1, characterized in that: The vest bag moving structure (6) includes a first motor (601), the outer wall of the first motor (601) is fixedly connected to the second shell (5), the output shaft of the first motor (601) is rotatably connected to the second shell (5) through a bearing, the output shaft of the first motor (601) is fixedly connected to a second disc (602), the protrusion of the second disc (602) is in contact with a cylinder (604), the end of the cylinder (604) is fixedly connected to a third disc (603), and the third disc ( The rotating shaft of the gear (603) is fixedly connected to the gear (605), and both ends of the rotating shaft of the gear (605) are rotatably connected to the second shell (5) through bearings. The gear (605) is meshed with the rack (606), and the rack (606) is slidably connected to the round rod processed in the second shell (5) through the protrusion at the lower end. The left end of the rack (606) is fixedly connected to the cross bar (607), and the cross bar (607) is slidably connected to the protrusion processed in the second shell (5) and the second shell (5) respectively.

5. The environmentally friendly vest bag surface printing machine according to claim 4, characterized in that: The left end of the cross bar (607) is fixedly connected to the third housing (8), the upper end of the third housing (8) is fixedly connected to the second motor (9), the output shaft of the second motor (9) is fixedly connected to the stud (10), both ends of the stud (10) are rotatably connected to the third housing (8) through bearings, the stud (10) is threadedly connected to the threaded block (11), the threaded block (11) is slidably connected to the vertical rod processed in the third housing (8) through the protrusion at the right end, the left end of the threaded block (11) is fixedly connected to the clamping block (12), and the outer wall of the clamping block (12) is slidably connected to the third housing (8).

6. The environmentally friendly vest bag surface printing machine according to claim 1, characterized in that: The rear end of the base (1) is fixedly connected to a second curved block (18), the outer wall of the second curved block (18) is fixedly connected to a second electric telescopic rod (19), the output end of the second electric telescopic rod (19) is installed with a printing mold (20), the rear end of the base (1) is fixedly connected to a third curved block (21), the upper end of the third curved block (21) is fixedly connected to a third motor (22), the output shaft of the third motor (22) is rotatably connected to the third curved block (21) through a bearing, and the output shaft of the third motor (22) is installed with a fan blade (7).

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