Woven bag pad printing machine

Abstract

The invention discloses a woven bag pad printing machine which comprises a rack, and a pad printing device is arranged in the middle of the rack. The sliding seat is connected with a linear bearing; the linear bearing is detachably connected with the sliding seat; supporting seats are arranged on the two sides of the rack and provided with second air cylinders, the second air cylinders are connected with driving shafts, the driving shafts are provided with positioning plates, clamping jaws are arranged on one sides of the positioning plates, and the clamping jaws are connected with third air cylinders; a plurality of linear bearings are arranged on the guide rod; a magnetic block is arranged below the guide rod; one end of the magnetic block is connected with a cylinder IV; the third air cylinder drives the clamping jaw to clamp the exposed connecting rod, the second air cylinder drives the clamping jaw to pull out the connecting rod, the magnetic block is driven by the fourth air cylinder to drive the linear bearing to move out along the guide rod, then the magnetic block drives a new linear bearing to move to the sliding base, and the second air cylinder and the third air cylinder are matched to insert the connecting rod again to complete replacement. The pad printing machine can automatically replace the linear bearing, the service life of the bearing is prolonged, the stability of the printing quality is ensured, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention relates to a pad printing machine for woven bags. Background Art

[0002] As an indispensable precision equipment in the printing industry, pad printing machines are mainly used to print corporate trademarks or graphic logos in the field of woven bags. The movement accuracy and stability of the pad printing head, its core component, directly affect the printing quality. In the design of traditional pad printing machines, the reciprocating motion of the pad printing head is mainly achieved by sliding bearings. These sliding bearings are usually made of copper-based or composite materials, with the advantages of low cost, easy installation, and strong load-bearing capacity, and are widely used in industrial production.

[0003] At present, the installation method of sliding bearings on pad printing machines mainly adopts interference fit or press-fitting to fix the bearings on the guide rod mechanism of the pad printing head. This installation method requires professional tools for disassembly and assembly, and the installation process must be carried out strictly in accordance with the specifications to ensure that the matching clearance between the bearing and the shaft is appropriate. Under normal working conditions, the sliding bearing reduces friction through the lubricating oil film on its surface to ensure the smooth movement of the pad printing head.

[0004] However, with the continuous improvement of production efficiency requirements of modern printing technology, the working frequency of pad printing machines is getting faster and faster. During the high-speed reciprocating motion of the pad printing head, the sliding bearing is subjected to huge mechanical and thermal loads. Especially under continuous working conditions, the friction between the bearing and the shaft will generate a lot of heat, which is difficult to dissipate in time, causing the bearing temperature to continue to rise.

[0005] Increased temperature will cause a series of problems: first, overheating will cause the physical properties of the bearing material to change, affecting its load-bearing capacity and service life; second, high temperature will accelerate the oxidation and decomposition of the lubricating oil, significantly reducing the lubrication effect; third, increased temperature will also cause the fit clearance between the bearing and the shaft to change, affecting the movement accuracy.

[0006] When a bearing is damaged, the most obvious manifestation is the increase in operating noise. A damaged bearing will produce abnormal vibration and friction noise, which not only affects the working environment, but also further aggravates the wear of the bearing. More seriously, the decline in bearing performance will directly lead to a decrease in the movement efficiency of the pad printing head, affecting the production rhythm of the equipment, and may even cause substandard printing quality.

[0007] In addition, the traditional bearing replacement process is relatively complicated. When a bearing is found to be damaged and needs to be replaced, it is usually necessary to shut down the machine for maintenance, disassemble the entire pad printing head, and then use special tools to remove the old bearing and install a new bearing. This process is not only time-consuming, but also requires professional maintenance personnel to operate, resulting in large downtime losses. At the same time, since the bearing replacement process may affect the accuracy of other components, re-debugging is often required after replacement, which further prolongs the downtime of the equipment.

[0008] Therefore, it is of great practical significance to develop a pad printing machine that can quickly and automatically replace bearings. It can not only reduce the maintenance time of the equipment and improve production efficiency, but also ensure that the bearings are always kept in the best working condition, thereby improving the stability of printing quality. At the same time, the automatic replacement function can also reduce the labor intensity of maintenance personnel and reduce the risk of human operating errors. Summary of the invention

[0009] The purpose of the present invention is to provide a pad printing machine for woven bags, which can automatically replace linear bearings, extend the service life of the bearings, ensure the stability of printing quality, and reduce labor intensity.

[0010] The above technical objectives of the present invention are achieved through the following technical solutions: A pad printing machine for woven bags comprises: a frame, a pad printing device is arranged in the middle of the frame; the pad printing device comprises a pad printing head, the pad printing head is connected to a sliding seat, guide rods are slidably connected to both sides of the sliding seat, and a linear bearing is connected to the guide rod; hourglass-shaped connecting grooves corresponding to each other are arranged between the linear bearing and the sliding seat, and a connecting rod matching the shape of the connecting groove is connected in the connecting groove, and the connecting rod is used to detachably connect the linear bearing and the sliding seat; support seats are arranged on both sides of the frame, and a second cylinder is arranged in the middle of the support seat, one end of the second cylinder is connected to a driving shaft, one end of the driving shaft is arranged with a positioning plate, and one side of the positioning plate A clamping jaw is provided, and the clamping jaw is connected to cylinder three; a plurality of linear bearings arranged in sequence are provided on the guide rod, and the outer shell of the linear bearing is made of iron metal material; a magnetic block is provided under the guide rod, and one end of the magnetic block is connected to cylinder four; wherein, when the linear bearing needs to be replaced, cylinder three drives the clamping jaw to clamp the exposed connecting rod, and cylinder two drives the clamping jaw to move outward to pull out the connecting rod, and the magnetic block is driven by cylinder four to adsorb the linear bearing to be replaced and drive it to move out along the guide rod, and then the new linear bearing is driven by the magnetic block to move to the sliding seat, and finally the connecting rod is reinserted through the cooperation of cylinder two and cylinder three to complete the replacement.

[0011] The present invention is further configured such that: the length of the connecting rod is greater than the length of the connecting groove; after the connecting rod is inserted into the connecting groove, one end is exposed outside the linear bearing for clamping by the clamping claws.

[0012] The present invention is further configured as follows: it also includes a baffle, which is hinged at one end of the frame and located at one end of the guide rod through a hinge shaft; one end of the hinge shaft is connected to a bevel gear box, the bevel gear box is connected to a driving wheel, and a gear rod is meshed on one side of the driving wheel; the baffle can rotate around the hinge shaft driven by the driving wheel to open or close the end of the guide rod.

[0013] The present invention is further configured to include: a bracket, a bracket that cooperates with the guide rod is abutted on the guide rod; a driving rod, driving rods are respectively connected to both sides of the bracket; gear one, the driving rod is meshed with gear one; a rotating shaft, a rotating shaft is connected to the middle part of gear one; wherein the bracket can move along the vertical guide rod through the cooperation of gear one and the driving rod to adjust the position of the bracket.

[0014] The present invention is further configured as follows: a cylinder 1 is provided at one end of the sliding seat, and an output shaft of the cylinder 1 is fixedly connected to the sliding seat; when the linear bearing is replaced, the output shaft of the cylinder 1 supports the sliding seat to prevent the sliding seat from falling.

[0015] The present invention is further configured as follows: there are multiple pad printing heads, and the multiple pad printing heads are arranged at intervals along the length direction of the sliding seat.

[0016] The present invention is further configured such that an interference fit is adopted between the connecting rod and the connecting groove.

[0017] In summary, the present invention has the following beneficial effects: The pad printing machine provided by the present invention realizes automatic and rapid replacement of linear bearings through the bearing replacement structure design, which solves the technical problems of the traditional pad printing machine that the bearings need to be manually disassembled and assembled and the maintenance time is long. The hourglass-shaped connecting groove and the connecting rod are detachably connected, and the connecting rod is precisely clamped and pulled out in cooperation with the clamping claw mechanism, so that the bearing disassembly and assembly process is more reliable. By arranging a plurality of linear bearings with iron shells arranged in sequence on the guide rod, combined with the cooperative drive of the magnetic block and the cylinder, the bearings can be accurately transported and positioned, greatly improving the replacement efficiency. The design of the baffle mechanism and the bracket provides safety protection and stable support for the bearing replacement process. This automated bearing replacement solution shortens the traditional maintenance time of several hours to several minutes, which not only reduces the labor intensity of maintenance personnel and reduces human operating errors, but also can replace worn bearings in time, ensure the movement accuracy of the pad printing head, and improve printing quality. At the same time, the standardized replacement process extends the service life of the equipment, reduces maintenance costs, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment; Figure 2 This is a schematic diagram of the structure of the embodiment after some support seats are deleted; Figure 3 for Figure 2A magnified view of area A; Figure 4 It is a schematic diagram of the connection relationship between the linear bearing and the sliding seat; Figure 5 for Figure 4 Exploded view of; Figure 6 This is a schematic diagram of the structure after the top frame is deleted from the embodiment.

[0019] Figure numerals: 1, frame; 2, pad printing device; 3, pad printing head; 4, sliding seat; 5, guide rod; 6, linear bearing; 7, scraper; 8, ink tray; 9, cylinder one; 10, connecting groove; 11, connecting rod; 12, supporting seat; 13, cylinder two; 14, driving shaft; 15, positioning plate; 16, clamping claw; 17, cylinder three; 18, magnetic block; 19, cylinder four; 20, baffle; 21, hinge shaft; 22, bevel gear box; 23, driving wheel; 24, gear rod; 25, bracket; 26, driving rod; 27, gear one; 28, rotating shaft; 29, mounting column; 30, gear two; 31, active rod; 32, fixing plate; 33, positioning shaft. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0022] In the description of the present invention, "multiple" means two or more than two, unless otherwise clearly defined. In the present invention, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1 As shown, a pad printing machine for woven bags includes a frame 1. A pad printing device 2 is arranged in the middle of the frame 1. The pad printing device 2 includes a pad printing head 3. The pad printing head 3 can be set to at least one. The pad printing head 3 is connected to a sliding seat 4. The sliding seat 4 can drive the pad printing head 3 to move back and forth. Guide rods 5 are slidingly connected on both sides of the sliding seat 4. The sliding seat 4 is connected to a linear bearing 6 on the guide rod 5. Lubricating oil is added to the linear bearing 6 to ensure the smoothness of the reciprocating motion of the sliding seat 4.

[0025] At least one scraper 7 is also provided on one side of the sliding seat 4. An ink tray 8 is provided below the scraper 7. The scraper 7 scrapes the ink on the ink tray 8 to make the ink evenly distributed in the ink tray 8, and the ink in the ink tray 8 is dipped by the pad printing head 3 to perform pad printing on the substrate.

[0026] The above is the prior art and will not be described in detail here.

[0027] The core technical solution of this application is as follows: Since the pad printing head 3 slides back and forth very quickly, the linear bearing 6 may easily run out of lubrication or become damaged after a period of time. Therefore, the present application proposes a technical solution for automatically replacing the linear bearing 6.

[0028] like Figure 2 , Figure 3 As shown, in order to achieve the technical purpose of separating the linear bearing 6 from the sliding seat 4. A cylinder 9 is provided at one end of the sliding seat 4. The cylinder 9 is used to drive the sliding seat 4 to slide back and forth. The linear bearing 6 and the sliding seat 4 described in the present application are detachably connected. When the linear bearing 6 is separated from the sliding seat 4, the sliding seat 4 is temporarily supported by the rigid output shaft of the cylinder 9 to prevent the sliding seat 4 from falling.

[0029] like Figure 4 , Figure 5As shown, hourglass-shaped connecting grooves 10 corresponding to each other are provided between the linear bearing 6 and the sliding seat 4. A connecting rod 11 that matches the shape of the connecting groove 10 is connected in the connecting groove 10. The connecting rod 11 is inserted into the connecting groove 10 so that the sliding seat 4 and the linear bearing 6 are fixedly arranged. Among them, the connecting rod 11 and the connecting groove 10 can be arranged with a slight interference fit to improve the installation stability. In addition, the hourglass-shaped connecting rod 11 and the connecting groove 10 can increase the complexity of the connection, and can further improve the installation stability compared to ordinary round and square shapes. In addition, the length of the connecting rod 11 is greater than the length of the connecting groove 10, so that after the connecting rod 11 is inserted into the connecting groove 10, one end is exposed outside the linear bearing 6.

[0030] like Figure 2 In the present application, support bases 12 are arranged on both sides of the frame 1. The support base 12 is arranged in a "door" shape, and one end thereof is fixedly connected to the frame 1.

[0031] like Figure 3 As shown, a cylinder 2 13 is provided in the middle of the support seat 12. A driving shaft 14 is connected to one end of the cylinder 2 13. A positioning plate 15 is provided at one end of the driving shaft 14. Two rows of upper and lower clamps 16 corresponding to one end of the connecting rod 11 are provided on one side of the positioning plate 15. The clamps 16 are connected to a cylinder 3 17. The clamps 16 are driven to close and open by the cylinder 3 17.

[0032] When the linear bearing 6 needs to be replaced, the clamping jaw 16 clamps the connecting rod 11 under the action of the cylinder three 17. The cylinder two 13 works to pull the connecting rod 11 out of the connecting groove 10, thereby achieving the technical purpose of separating the sliding seat 4 from the linear bearing 6. Among them, the clamping jaw 16 and the cylinder three 17 can be mechanically connected through a connecting rod, which is a prior art and will not be described in detail.

[0033] like Figure 2 , Figure 3 As shown, for the technical purpose of replacing the original linear bearing 6 with a new linear bearing 6. The present application is provided with a plurality of linear bearings 6 arranged in sequence on the guide rod 5. Correspondingly, the outer shell of the linear bearing 6 is made of iron metal material. A magnetic block 18 is provided at the bottom of the arranged linear bearings 6. The magnetic block 18 can be adsorbed with the linear bearing 6, and the magnetism of the magnetic block 18 can overcome the friction of the weight of a linear bearing 6 to make it move on the guide rod 5, but it cannot drive multiple linear bearings 6 to move.

[0034] One end of the magnetic block 18 is connected to a cylinder 19. The cylinder 19 can drive the magnetic block 18 to move back and forth. When the cylinder 19 is working, the magnetic block 18 first passes through the linear bearing 6 closest to the cylinder 19. At this time, multiple linear bearings 6 are arranged on the guide rod 5, and the magnetism of the magnetic block 18 cannot overcome the friction of multiple linear bearings 6 to make it move. Therefore, the magnetic block 18 continues to move until it moves to the bottom of the linear bearing 6 at the end. At this time, the magnetic block 18 overcomes the friction of the linear bearing 6, so that the magnetic block 18 drives a single linear bearing 6 to move on the guide rod 5.

[0035] When the connecting rod 11 has been removed to separate the sliding seat 4 from the linear bearing 6, the magnetic block 18 drives a single new linear bearing 6 to move to the side of the linear bearing 6 that needs to be removed, so that the two are abutted. After that, since the magnetic block 18 cannot drive the two linear bearings 6 to move, it continues to move forward to the bottom of the linear bearing 6 that needs to be removed, and pushes it out of the guide rod 5. After that, the magnetic block 18 returns to the bottom of the new linear bearing 6 under the action of the cylinder four 19, and moves the linear bearing 6 to a position where the connecting groove 10 of the linear bearing 6 and the sliding seat 4 are aligned with each other. At this time, the connecting rod 11 clamped by the clamp 16 is moved again under the action of the cylinder two 13 to be inserted into the connecting groove 10, completing the replacement of the new linear bearing 6. After that, the cylinder four 19 is reset to prepare for the next replacement.

[0036] like Figure 1 , Figure 3 As shown, in order to ensure that one end of the guide rod 5 is closed when the pad printing machine works normally, the stability of the guide rod 5 is improved and the linear bearing 6 is prevented from being detached and flying out of the guide rod 5 due to the loosening of the connecting rod 11 during the pad printing process, causing a safety hazard.

[0037] The present application has a baffle 20 hingedly provided at one end of the frame 1. The baffle 20 is placed at one end of the guide rod 5. A hinge shaft 21 is provided at one end of the baffle 20. A bevel gear box 22 is connected to one end of the hinge shaft 21. The bevel gear box 22 is disposed in the support seat 12 and is fixedly connected to the support seat 12. The bevel gear box 22 is connected to a driving wheel 23. A gear rod 24 is meshed on one side of the driving wheel 23. The gear rod 24 is fixedly connected to the positioning plate 15. When the positioning plate 15 moves in a direction away from the connecting rod 11 under the action of the cylinder 2 13, the driving wheel 23 is driven to rotate clockwise. The driving wheel 23 causes the hinge shaft 21 to rotate counterclockwise through the bevel gear box 22, thereby being able to control the rotation of the baffle 20.

[0038] In the initial state, the pad printer works normally. In this process, the baffle 20 blocks one side of the guide rod 5 and is strongly magnetically connected to the guide rod 5, so that both ends of the guide rod 5 are fixed, preventing the guide rod 5 from being unstable due to unilateral fixing, causing shaking or vibration, and improving the printing quality.

[0039] When the bearing needs to be replaced, the clamping claw 16 clamps the connecting rod 11 and pulls the connecting rod 11 out of the connecting groove 10. At this time, the positioning plate 15 moves outward, causing the gear rod 24 to move away from the frame 1, thereby driving the driving wheel 23 to rotate clockwise. Through the setting of the bevel gear box 22, the hinge shaft 21 rotates counterclockwise, driving the baffle 20 to rotate counterclockwise. At this time, one end of the guide rod 5 is exposed. Under the action of the cylinder four 19, the magnetic block 18 brings the linear bearing 6 that needs to be replaced out of the guide rod 5, and allows the new guide rod 5 to enter the specified position and reinsert the connecting rod 11. Under the above setting, one end of the guide rod 5 can be stably set when the pad printing machine is working normally, thereby improving the installation stability of the guide rod 5. On the other hand, the purpose of replacing the linear bearing 6 can be achieved.

[0040] like Figure 3 , Figure 6 As shown, in order to fix the position of the linear bearing 6 on the guide rod 5 during normal operation. The present application has a bracket 25 that is in contact with the guide rod 5 and matches the guide rod 5. The bracket 25 is used to block the linear bearing 6 that is not in use. Drive rods 26 are connected to both sides of the bracket 25. The drive rod 26 is meshed with a gear 27. A rotating shaft 28 is connected to the middle of the gear 27. A mounting column 29 is connected to the bearing between the rotating shaft 28 and the support seat 12. The other end of the rotating shaft 28 is connected to a gear 2 30. An active rod 31 is meshed above the gear 2 30. The active rod 31 is fixedly connected to the positioning plate 15.

[0041] As described above, when the clamping jaws 16 clamp the connecting rod 11 and move outward, the active rod 31 is driven to move outward, and then the gear 2 30 rotates counterclockwise, and the gear 1 27 rotates counterclockwise. When the gear 1 27 rotates counterclockwise, the driving rod 26 is driven to move upward, and then the driving rod 26 drives the bracket 25 to move upward, so that the linear bearing 6 on the guide rod 5 is no longer restricted by the bracket 25 and can move on the guide rod 5.

[0042] In the initial state, the bracket 25 is located at a side of the linear bearing 6 which is not in use, and limits the linear bearing 6 to prevent the linear bearing 6 from freely moving on the guide rod 5 when the pad printing machine is working normally.

[0043] Optimized, in order to prevent the position of the bracket 25 from changing in the horizontal direction. The brackets 25 are fixedly connected with a fixing plate 32. A positioning shaft 33 is connected to the middle of the fixing plate 32. The positioning shaft 33 is slidably arranged on the frame 1, so that the bracket 25 is limited by the positioning shaft 33 and can only move in the longitudinal direction, thereby limiting the horizontal displacement of the bracket 25.

[0044] Through the above arrangement, when the linear bearing 6 on the pad printer works for a long time, due to the high internal temperature of the linear bearing 6, which may easily cause the linear bearing 6 to be damaged or the lubrication fails, the corresponding temperature sensor can sense the signal, and then the pad printer will stop. In the process of the clamp 16 moving the connecting rod 11 out of the connecting groove 10, the bracket 25 is moved up and the baffle 20 is rotated to open, preparing for the subsequent replacement process. The cylinder 4 19 drives the new linear bearing 6 to enter the specified position, and can push out the replaced linear bearing 6 at the same time.

[0045] Under the above setting, the technical purpose of automatically replacing the bearings of the pad printing machine is achieved, and the preparation work for replacing the guide rod 5 can be synchronously realized through the movement of the cylinder 2 13, which has the characteristics of low-cost automation. The designer only needs to realize the overall replacement process by designing the working procedures of the cylinder intake and exhaust.

[0046] The overall working process is as follows: 1. In the initial state, the bracket 25 is on the guide rod 5 to block the unused linear bearing 6 from moving, the baffle 20 is on one side of the guide rod 5 and is magnetically connected to the guide rod 5, the clamping jaws 16 are not clamped, and one end of the connecting rod 11 is between the clamping jaws 16 waiting to be clamped; 2. After working for a period of time, the temperature sensor senses that the temperature has risen to a threshold value that can be set to 80-90°C, and the pad printer stops; 3. The clamping jaw 16 clamps the connecting rod 11 under the action of the cylinder 3 17, and the cylinder 2 13 drives the clamping jaw 16 to move outward, so that the connecting rod 11 is separated from the linear bearing 6 and the sliding seat 4. At the same time, the gear rod 24 moves to drive the driving wheel 23 to rotate, and then drives the hinge shaft 21 to rotate through the bevel gear box 22, so that the baffle 20 flips and separates from the guide rod 5, and one end of the guide rod 5 is exposed; 4. At the same time, the active rod 31 moves outward, causing the gear 2 30 and the gear 1 27 to rotate, thereby driving the driving rod 26 and the bracket 25 to move upward, so that the linear bearing 6 on the guide rod 5 is no longer limited by the bracket 25; 5. The cylinder 4 19 works to make the new linear bearing 6 abut against the side of the linear bearing 6 to be replaced. Then, the magnetic block 18 drives the linear bearing 6 to be replaced to push out the guide rod 5. Then, the magnetic block 18 returns a short distance to the bottom of the new linear bearing 6 under the action of the cylinder 4 19, and drives the new linear bearing 6 to the specified position. 6. The second cylinder 13 works, driving the connecting rod 11 clamped by the clamping jaw 16 to re-insert into the connecting groove 10, completing the fixation between the sliding seat 4 and the new linear bearing 6; 7. The pad printing machine is restarted and the above replacement process is completely free of human intervention, thereby achieving the technical purpose of automatically replacing the linear bearing 6 of the pad printing machine.

[0047] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A woven bag pad printing machine, characterized in that: include: A frame (1), wherein a pad printing device (2) is arranged in the middle of the frame (1); The pad printing device (2) comprises a pad printing head (3), the pad printing head (3) is connected to a sliding seat (4), both sides of the sliding seat (4) are slidingly connected to guide rods (5), and the sliding seat (4) is connected to linear bearings (6) on the guide rods (5); Hourglass-shaped connecting grooves (10) corresponding to each other are arranged between the linear bearing (6) and the sliding seat (4), and a connecting rod (11) matching the shape of the connecting groove (10) is connected in the connecting groove (10), and the connecting rod (11) is used to detachably connect the linear bearing (6) and the sliding seat (4); Support seats (12) are arranged on both sides of the frame (1), a second cylinder (13) is arranged in the middle of the support seat (12), one end of the second cylinder (13) is connected to a driving shaft (14), one end of the driving shaft (14) is arranged with a positioning plate (15), one side of the positioning plate (15) is arranged with a clamping claw (16), and the clamping claw (16) is connected to a third cylinder (17); The guide rod (5) is provided with a plurality of linear bearings (6) arranged in sequence, and the outer shell of the linear bearing (6) is made of an iron metal material; A magnetic block (18) is arranged below the guide rod (5), and one end of the magnetic block (18) is connected to a cylinder four (19); When the linear bearing (6) needs to be replaced, the cylinder three (17) drives the clamp (16) to clamp the exposed connecting rod (11), and the cylinder two (13) drives the clamp (16) to move outward to pull out the connecting rod (11). The magnetic block (18) is driven by the cylinder four (19) to adsorb the linear bearing (6) to be replaced and drive it to move out along the guide rod (5), and then the new linear bearing (6) is driven by the magnetic block (18) to move to the sliding seat (4). Finally, the connecting rod (11) is reinserted through the cooperation of the cylinder two (13) and the cylinder three (17) to complete the replacement.

2. The woven bag pad printing machine according to claim 1, characterized in that: The length of the connecting rod (11) is greater than the length of the connecting groove (10). After the connecting rod (11) is inserted into the connecting groove (10), one end of the connecting rod (11) is exposed outside the linear bearing (6) to be clamped by the clamping claw (16).

3. The woven bag pad printing machine according to claim 1, characterized in that: It also includes a baffle (20), which is hingedly arranged at one end of the frame (1) through a hinge shaft (21) and is located at one end of the guide rod (5); One end of the hinge shaft (21) is connected to a bevel gear box (22), the bevel gear box (22) is connected to a driving wheel (23), and one side of the driving wheel (23) is meshed with a gear rod (24); Driven by the driving wheel (23), the baffle (20) can rotate around the hinge shaft (21) to open or close the end of the guide rod (5).

4. The woven bag pad printing machine according to claim 1, characterized in that: Also includes: A bracket (25), the guide rod (5) being in contact with the bracket (25) that matches the guide rod (5); A driving rod (26), the two sides of the bracket (25) are respectively connected to the driving rod (26); Gear 1 (27), the driving rod (26) is meshed with the gear 1 (27); A rotating shaft (28), the middle portion of the gear 1 (27) being connected to the rotating shaft (28); The bracket (25) can move vertically along the guide rod (5) through the cooperation between the gear 1 (27) and the driving rod (26) to adjust the position of the bracket (25).

5. The woven bag pad printing machine according to claim 1, characterized in that: A cylinder 1 (9) is provided at one end of the sliding seat (4), and an output shaft of the cylinder 1 (9) is fixedly connected to the sliding seat (4); When the linear bearing (6) is replaced, the output shaft of the cylinder 1 (9) supports the sliding seat (4) to prevent the sliding seat (4) from falling.

6. The woven bag pad printing machine according to claim 1, characterized in that: There are a plurality of pad printing heads (3), and the plurality of pad printing heads (3) are arranged at intervals along the length direction of the sliding seat (4).

7. The woven bag pad printing machine according to claim 1, characterized in that: An interference fit is adopted between the connecting rod (11) and the connecting groove (10).

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