Lower suction nozzle paper feeding mechanism of paper feeding machine of die-cutting machine

Abstract

The utility model discloses a lower suction nozzle paper feeding mechanism of a paper feeding machine of a die-cutting machine. The lower suction nozzle paper feeding mechanism comprises a paper feeding part, the paper feeding part comprises a supporting cross beam located between the left wall plate and the right wall plate, a fixing shaft inserted in the two middle fixing plates, a power assembly installed at the right end of the fixing shaft and a suction nozzle assembly installed between the two middle fixing plates. The suction nozzle assembly comprises two suction nozzle shaft sliding rails symmetrically installed on the two middle fixing plates, two suction nozzle shaft sliding blocks installed on the two suction nozzle shaft sliding rails respectively, two suction nozzle shaft fixing blocks installed on the two suction nozzle shaft sliding blocks respectively, and a suction nozzle shaft installed between the two suction nozzle shaft fixing blocks. The suction nozzles are evenly installed on the top face of the suction nozzle shaft, one ends of the two suction nozzle swing arms are connected with the corresponding suction nozzle shaft fixing blocks through corresponding suction nozzle connecting rods, and the other ends of the two suction nozzle swing arms are installed on the two sides of the fixing shaft respectively. The paper is adsorbed through the suction nozzle, and the purposes of high-precision paper conveying, rapid paper adjustment and high production efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to a lower suction nozzle paper feeding mechanism of a die-cutting machine paper feeder, belonging to the technical field of die-cutting machine paper feeders. Background Technology

[0002] At present, die-cutting paper feeders are widely used in packaging, printing and other industries. The working process mainly involves paper conveying and positioning, as well as subsequent die-cutting. Specifically: (1) Paper conveying: The paper feeder conveys the paper to the front and side guides for initial positioning through the paper feeding section; (2) Secondary positioning: The paper is then sent to the die-cutting mechanism by the toothed rack for secondary positioning to ensure the accuracy of die-cutting; (3) Die-cutting process: In the die-cutting mechanism, the die-cutting knife, steel knife, hardware mold, etc. are used to apply a certain pressure through the printing plate to cut the cardboard or corrugated paper into a specific shape; (4) Post-processing: After the die-cutting is completed, the paper is conveyed to the waste removal mechanism by the toothed rack to remove the unwanted parts, and then enters the paper receiving section to complete the entire die-cutting operation.

[0003] In particular, the paper feeding mechanism of the die-cutting machine is mainly responsible for the automatic paper feeding function. Through precise mechanical control and sensor technology, it ensures the accurate delivery and positioning of the paper, thereby improving the production efficiency and processing accuracy of the die-cutting machine.

[0004] However, the paper feeding mechanisms on the market have the following technical defects: 1) The corrugated and printed paper after the die-cutting machine is mounted mostly adopts a mechanically driven front-edge paper feeding mechanism, resulting in low production efficiency and insufficient processing accuracy; 2) Some models rely on manual paper feeding and experience-based debugging, which is time-consuming and labor-intensive; 3) They cannot be quickly adjusted when changing paper, resulting in low production efficiency and difficulty in adapting to the operation mode changes of various paper types.

[0005] In conclusion, although the paper feeding mechanism technology of die-cutting machine paper feeders has developed, there are still shortcomings that need further optimization and improvement. Summary of the Invention

[0006] To address the aforementioned technical problems, this utility model provides a lower suction nozzle paper feeding mechanism for a die-cutting machine paper feeder. The lower suction nozzle, driven by a servo motor, is used to pick up paper, thereby achieving the technical objectives of high-precision paper feeding, rapid paper adjustment, high production efficiency, and long service life.

[0007] To achieve the above technical objectives, this utility model provides a lower suction nozzle paper feeding mechanism for a die-cutting machine paper feeder, including a paper feeding part; the paper feeding part includes a support beam located between the left and right wall panels, two support side plates respectively installed at the left and right ends of the support beam, two intermediate fixing plates symmetrically installed on the rear side of the support beam, a fixing shaft inserted in the two intermediate fixing plates, a power assembly installed at the right end of the fixing shaft, and a suction nozzle assembly installed between the two intermediate fixing plates;

[0008] The suction nozzle assembly includes two suction nozzle shaft slide rails symmetrically mounted on the inner sides of two intermediate fixed plates, two suction nozzle shaft sliders respectively mounted on the two suction nozzle shaft slide rails, two suction nozzle shaft fixing blocks respectively mounted on the inner sides of the two suction nozzle shaft sliders, a suction nozzle shaft mounted between the two suction nozzle shaft fixing blocks, and several suction nozzles evenly mounted on the top surface of the suction nozzle shaft. One end of each suction nozzle is connected to two suction nozzle swing arms corresponding to the suction nozzle shaft fixing blocks via a corresponding suction nozzle connecting rod, and the other ends of the two suction nozzle swing arms are respectively mounted on both sides of the fixed shaft.

[0009] The power component drives the fixed shaft to swing back and forth, thereby causing the suction nozzle to move back and forth along the two suction nozzle shaft slide rails, following the two suction nozzle shaft sliders.

[0010] Furthermore, the power assembly of this utility model includes a servo motor installed below the support beam, a camshaft fixing plate installed on the support beam and located to the right of the right middle fixing plate, a camshaft inserted in the right middle fixing plate and the camshaft fixing plate, a gas distribution valve installed below the right middle fixing plate, and a swing frame and rocker arm installed at the right end of the fixing shaft, and the gas source is connected to each nozzle through the gas distribution valve.

[0011] The right end of the camshaft is connected to the output shaft of the servo motor via a synchronous belt; the left end of the camshaft is connected to the drive shaft of the gas distribution valve via a chain; a left cam and a right cam are installed in the middle of the camshaft, and the flanges of the left cam and the right cam are staggered.

[0012] The swing frame is provided with a lower support arm, an upper front support arm and an upper rear support arm; a spring stop block is installed on the lower support arm, and a swing frame bearing is installed on the upper front support arm, with the swing frame bearing located below the left cam and in contact with the contour curve of the left cam; the upper rear support arm is connected to the middle of the rocker arm.

[0013] A rocker arm bearing is installed at the top of the rocker arm, which is located behind the right cam and contacts the contour curve of the right cam; a support block is installed at the bottom of the rocker arm, and a spring is installed on the front side of the support block through a guide shaft, with the spring located behind the spring stop block.

[0014] The contact between the flange of the left cam and the swing arm bearing, and the contact between the flange of the right cam and the rocker arm bearing, alternate, thereby driving the fixed shaft to swing back and forth synchronously.

[0015] Furthermore, this utility model also includes a reset assembly installed on the left end of the fixed shaft; the reset assembly includes a reset spring swing arm with one end installed on the left end of the fixed shaft, and the other end of the reset spring swing arm is connected to the rear side of the support beam through a reset spring.

[0016] Furthermore, the paper feeding unit also includes a proximity switch installed on the outer side of the camshaft fixing plate and located behind the right end of the camshaft, and a switch trigger installed on the right end of the camshaft.

[0017] Furthermore, the present invention further includes a suction nozzle assembly, which includes a suction nozzle connecting plate installed on the bottom surface of the two middle suction nozzles, a suction nozzle slider installed on the bottom surface of the suction nozzle connecting plate, a suction nozzle slide rail inserted in the suction nozzle slider, and a suction nozzle slide rail mounting seat installed on the rear side of the support beam, wherein both ends of the suction nozzle slide rail are installed in the suction nozzle slide rail mounting seat.

[0018] Furthermore, the paper feeding unit of this utility model also includes an upper slide rail installed on the inner side of each wall panel and a lower slide rail with a rack on the bottom surface, two slide rail bearings installed on the outer side of each support side panel and a gear located below the two bearings, and the two slide rail bearings are located between the corresponding upper slide rail and lower slide rail, and the gear meshes with the rack on the corresponding lower slide rail.

[0019] Furthermore, the paper feeding unit also includes a rear stop gauge installed in the middle of the top surface of the support beam, two side-aligning paperboard slide rails installed on both sides of the top surface of the support beam, and two side-aligning paperboards respectively installed on the corresponding side-aligning paperboard slide rails.

[0020] Furthermore, this utility model also includes a guide rail section installed behind the paper feeding section; the guide rail section includes two round rods installed between the left and right wall panels and a lead screw located between the two round rods, two reduction motors respectively installed at both ends of the lead screw, two side guide fixing blocks respectively fitted on both sides of the two round rods and the lead screw, a side guide plate and a three-axis cylinder installed on each side guide fixing block, and the three-axis cylinder is respectively connected to the outer side of the corresponding side guide plate.

[0021] Furthermore, the stop section of this utility model also includes a front gauge fixing block fitted between the two round rods and the lead screw, a lifting reducer installed above the front gauge fixing block, an upper bevel gear installed on the output shaft of the lifting reducer, a rotating shaft fixing block installed on the upper part of the front gauge fixing block, a front gauge slide rail installed on the lower part of the front gauge fixing block, a slider with internal threads installed in the front gauge slide rail, a rotating shaft with external threads inserted into the slider with internal threads and the rotating shaft fixing block, a lower bevel gear installed at the top of the rotating shaft with external threads, and a front gauge plate installed on the slider with internal threads, wherein the upper bevel gear and the lower bevel gear mesh with each other.

[0022] Furthermore, the stop section of this utility model also includes a scale mounting plate installed on one side of the front gauge slide rail, a scale installed on the scale mounting plate, and a pointer installed on one side of the front gauge plate, with the pointer located behind the scale.

[0023] In summary, this utility model uses a servo motor with a suction system to drive a lower suction nozzle to adsorb paper, and adopts digital signal servo control for paper feeding, up and down jogging engagement rollers, and paper feeding beater alignment. It has the advantages of high-precision paper feeding, rapid paper adjustment, high production efficiency, and long service life.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] 1. The paper feeding mechanism has been optimized, reducing reliance on manual labor and increasing the level of automation.

[0026] 2. The conveying mechanism has been improved, enabling rapid positioning and adjustment during paper changes, thus increasing production efficiency.

[0027] 3. Enhanced machine adaptability to meet the operational needs of various paper types. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the paper feeding section in this utility model;

[0029] Figure 2 This is a schematic diagram of the paper feeding section after the left and right wall panels have been removed in this utility model.

[0030] Figure 3 This is a schematic diagram of the power assembly of the paper feeding section in this utility model. Figure 1 ;

[0031] Figure 4 This is a schematic diagram of the power assembly of the paper feeding section in this utility model. Figure 2 ;

[0032] Figure 5 This is a schematic diagram of the structure of the suction nozzle assembly and the reset assembly of the paper feeding section in this utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the guide gauge part in this utility model;

[0034] Figure 7 for Figure 6 A partially enlarged schematic diagram of point A after the removal of the front guide plate at point A;

[0035] Figure 8 A schematic diagram of the paper feeder of the die-cutting machine using this utility model;

[0036] In the diagram: 1. Paper feeding section; 11. Servo motor; 111. Lower synchronous belt pulley; 12. Camshaft; 120. Left cam; 121. Right cam; 122. Camshaft fixing plate; 123. Upper synchronous belt pulley; 124. Upper driven sprocket; 125. Proximity switch bracket; 13. Gas distribution valve; 131. Lower driven sprocket; 14. Swing frame; 141. Rocker arm; 142. Rocker arm bearing; 143. Support block; 144. 145. Guide shaft; 146. Spring; 147. Spring stop; 150. Swing frame bearing; 151. Intermediate fixing plate; 152. Suction nozzle; 153. Suction nozzle shaft; 154. Suction nozzle shaft fixing block; 155. Suction nozzle shaft slider; 156. Suction nozzle shaft slide rail; 157. Suction nozzle connecting rod; 158. Suction nozzle swing arm; 159. Suction nozzle connecting plate; 160. Suction nozzle slider; 161. Suction nozzle slide rail mounting base. 162. Fixed shaft; 163. Return spring swing arm; 164. Return spring; 2. Wall panel; 21. Support beam; 22. Support side plate; 23. Upper slide rail; 24. Lower slide rail; 25. Slide rail bearing; 26. Gear; 27. Slide rail locking block; 28. Rear stop gauge; 29. ​​Side aligning cardboard; 291. Side aligning cardboard slide rail; 3. Stop gauge section; 31. Round rod; 32. Gear motor; 33. Motor cover; 34. 35. Front guide plate, 36. Side guide plate, 37. Side guide fixing block, 38. Three-axis cylinder, 39. Lead screw, 40. Lifting reducer, 41. Upper bevel gear, 42. Lower bevel gear, 43. Rotary shaft fixing block, 44. Rotary shaft with external thread, 45. Front guide slide rail, 46. Slider with internal thread, 47. Scale mounting plate, 48. Scale, 49. Pointer, 50. Front guide fixing block, 61. Conveying section, 72. Paper feeding side aligning section. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0038] In the description of this application, terms such as "connection" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Those skilled in the art will understand the specific meaning of these terms in this application according to the specific circumstances.

[0039] In the description of this application, terms such as "up", "down", "left", "right", "front", and "back" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] like Figures 1 to 5 As shown, the paper feeding mechanism of the paper feeder of the die-cutting machine of this utility model includes a paper feeding part 1; the paper feeding part 1 includes a support beam 21 located between the left and right wall panels 2, two support side plates 22 respectively installed at the left and right ends of the support beam 21, two intermediate fixing plates 150 symmetrically installed on the rear side of the support beam 21, a fixing shaft 162 inserted in the two intermediate fixing plates 150, a power assembly installed at the right end of the fixing shaft 162, and a suction nozzle assembly installed between the two intermediate fixing plates 150, which are described in detail below.

[0041] like Figure 2 , Figure 3 , Figure 5 As shown, the suction nozzle assembly includes two suction nozzle shaft slide rails 155 symmetrically mounted on the inner sides of two intermediate fixed plates 150, placed one in front of the other; two suction nozzle shaft sliders 154 respectively mounted on the two suction nozzle shaft slide rails 155; two suction nozzle shaft fixing blocks 153 respectively mounted on the inner sides of the two suction nozzle shaft sliders 154; suction nozzle shafts 152 respectively mounted at both ends in the corresponding suction nozzle shaft fixing blocks 153; a plurality of suction nozzles 151 evenly mounted on the top surface of the suction nozzle shafts 152; two suction nozzle connecting rods 156 respectively mounted at one end on the inner side of the corresponding suction nozzle shaft fixing blocks 153; and two suction nozzle swing arms 157 respectively connected at one end to the other end of the corresponding suction nozzle connecting rods 156, with the other ends of the two suction nozzle swing arms 157 respectively mounted on both sides of the fixed shaft 162.

[0042] The power component drives the fixed shaft 162 to swing back and forth, so that the suction nozzle 151 moves back and forth along the two suction nozzle shaft slide rails 155, following the two suction nozzle shaft sliders 154.

[0043] In practice, the suction nozzle 151 is connected to an external air source (usually a negative pressure air source), creating a negative pressure inside the nozzle 151 to adsorb paper. When the suction nozzle 151 moves near the paper, the paper is adsorbed onto it due to the negative pressure inside. Furthermore, the fixed shaft 162 rotates in both directions under the drive of the power assembly, causing the two suction nozzle swing arms 157 on it to swing. This, in turn, drives the two suction nozzle shaft sliders 154 to move back and forth along the two suction nozzle shaft slide rails 155 via the two suction nozzle shaft fixing blocks 153. This causes the suction nozzle shaft 152 and its several suction nozzles 151 to move synchronously back and forth, allowing the suction nozzles 151 to sequentially adsorb different parts of the paper and deliver them. As the fixed shaft 162 continues to swing, the suction nozzles 151 deliver the adsorbed paper to the next processing position or output area.

[0044] like Figure 2 , Figure 3 , Figure 4 As shown, the power assembly includes a servo motor 11 installed on the lower right side of the support beam 21, a camshaft fixing plate 122 installed on the rear side of the support beam 21 and located to the right of the right middle fixing plate 150, a camshaft 12 inserted into the right middle fixing plate 150 and the camshaft fixing plate 122, a gas distribution valve 13 installed below the right middle fixing plate 150, and a swing frame 14 and a rocker arm 141 installed on the right end of the fixed shaft 162. The gas source is connected to each nozzle 151 via the gas distribution valve 13.

[0045] Among them, such as Figure 2 , Figure 4 As shown, an upper synchronous pulley 123 is installed on the right end of the camshaft 12, and a lower synchronous pulley 111 is installed on the output shaft of the servo motor 11. The upper synchronous pulley 123 and the lower synchronous pulley 111 are connected by a synchronous belt. An upper driven sprocket 124 is installed on the left end of the camshaft 12, and a lower driven sprocket 131 is installed on the transmission shaft of the gas distribution valve 13. The upper driven sprocket 124 and the lower driven sprocket 131 are connected by a chain. The portion of the camshaft 12 located between the right middle fixing plate 150 and the camshaft fixing plate 122 is equipped with a left cam 120 and a right cam 121.

[0046] like Figure 3 , Figure 4 As shown, the swing frame 14 is provided with a lower support arm, an upper front support arm and an upper rear support arm; a spring stop block 146 is installed on the lower support arm, a swing frame bearing 147 is installed on the upper front support arm, and the swing frame bearing 147 is located below the left cam 120 and in contact with the contour curve of the left cam 120; the upper rear support arm is connected to the middle part of the rocker arm 141.

[0047] like Figure 3 , Figure 4 As shown, a rocker arm bearing 142 is installed at the top of the rocker arm 141. The rocker arm bearing 142 is located behind the right cam 121 and is in contact with the contour curve of the right cam 121. A support block 143 is installed at the bottom of the rocker arm 141. A guide shaft 144 is installed on the front side of the support block 143. A spring 145 is fitted at the front end of the guide shaft 144, and the spring 145 is located behind the spring stop block 146.

[0048] In practice, the servo motor 11 is a motor capable of precisely controlling position and speed. It drives the camshaft 12 to rotate via a synchronous belt, thereby causing the left cam 120 and the right cam 121 to rotate synchronously. The left cam 120 and the right cam 121 are rotating components with elliptical flanges, so that their rotation will change their positions relative to the swing frame 14 and the rocker arm 141, and determine the movement trajectory of the suction nozzle 151. Furthermore, the flanges of the left cam 120 and the right cam 121 are staggered, as detailed below.

[0049] First, the right cam 121 rotates, and its contour curve remains in contact with the rocker arm bearing 142 at the top of the rocker arm 141. When the contour curve of the flange of the right cam 121 contacts the rocker arm bearing 142, it pushes the rocker arm bearing 142 and the top of the rocker arm 141 backward, causing the rocker arm 141 to rotate the swing frame 14 backward by a certain angle. This, in turn, causes the fixed shaft 162 to rotate backward by a certain distance, which in turn causes the two suction nozzle swing arms 157 on the fixed shaft 162 to swing backward by a certain distance. This causes the two suction nozzle swing arms 157 to move the suction nozzle shaft 152 and the suction nozzles 151 on it backward by a certain distance along the two suction nozzle slide rails 155. During this process, the spring 145 at the bottom of the rocker arm 141 and the spring stop 146 in front of the spring 145 play a buffering role. Furthermore, the contour curve of the non-flange of the left cam 120 is set to contact the swing frame bearing 147.

[0050] Secondly, when the contour curve of the flange of the left cam 120 contacts the swing arm bearing 147, it will push the swing arm bearing 147 and the swing arm 14 forward, causing the swing arm 14 to rotate forward by a certain angle. This will cause the fixed shaft 162 to rotate forward synchronously by a certain distance, which in turn will cause the two suction arm swing arms 157 on the fixed shaft 162 to swing forward by a certain distance. This will cause the two suction arm swing arms 157 to drive the suction shaft 152 and the suction nozzles 151 on it to move forward synchronously by a certain distance along the two suction rails 155. During this process, the contour curve of the non-flange of the right cam 121 is set to contact the rocker arm bearing 142.

[0051] In this way, driven by the servo motor 11, the contour curve of the left cam 120 flange contacts the swing frame bearing 147, and the contour curve of the right cam 121 flange contacts the rocker arm bearing 142, which alternately causes the swing frame 14 to rotate back and forth at a small angle, thereby driving the fixed shaft 162 to rotate back and forth synchronously, and then driving the suction shaft 152 and the suction nozzle 151 on it to move back and forth synchronously along the two suction nozzle slide rails 155, completing the linear reciprocating motion of the suction nozzle 151.

[0052] like Figure 5 As shown, the present invention also includes a reset assembly installed on the left end of the fixed shaft 162; the reset assembly includes a reset spring swing arm 163 with one end installed on the left end of the fixed shaft 162, a reset spring 164 with one end connected to the other end of the reset spring swing arm 163, and the other end of the reset spring 164 is connected to the rear side of the support beam 21.

[0053] In practice, when the flange of the right cam 121 contacts the rocker arm bearing 142, the fixed shaft 162 swings backward, and the return spring arm 163 also swings backward synchronously, stretching the return spring 164. When the flange of the right cam 121 leaves the rocker arm bearing 142, the fixed shaft 162 returns to its original position with the assistance of the return spring 164, ensuring that the contour curve of the right cam 121 remains in contact with the rocker arm bearing 142.

[0054] When the flange of the left cam 120 contacts the swing frame bearing 147, the fixed shaft 162 swings forward, and the return spring arm 163 swings forward synchronously, compressing the return spring 164. When the flange of the left cam 120 leaves the swing frame bearing 147, the fixed shaft 162 returns to its original position with the assistance of the return spring 164, ensuring that the contour curve of the left cam 120 remains in contact with the swing frame bearing 147.

[0055] In other embodiments, such as Figure 2 , Figure 5 As shown, the suction nozzle assembly also includes a suction nozzle connecting plate 158 installed on the bottom surface of the two middle suction nozzles 151, a suction nozzle slider 159 installed on the bottom surface of the suction nozzle connecting plate 158, a suction nozzle slide rail 160 inserted in the suction nozzle slider 159, and a suction nozzle slide rail mounting seat 161 installed on the rear side of the support beam 21, with both ends of the suction nozzle slide rail 160 installed in the suction nozzle slide rail mounting seat 161.

[0056] In other embodiments, such as Figure 3 As shown, the paper feeding unit 1 also includes a proximity switch bracket 125 mounted on the outer side of the camshaft fixing plate 122 and located behind the right end of the camshaft 12, a proximity switch mounted on the proximity switch bracket 125, and a switch trigger mounted on the right end of the camshaft 12.

[0057] In practical implementation, the proximity switch detects the real-time position of the camshaft 12 in a non-contact manner. When the camshaft 12 rotates until the switch trigger at its right end aligns with the proximity switch, the proximity switch triggers a signal to control the suction nozzle 151 to perform the action of adsorbing or releasing paper, ensuring that the movement trajectory of the suction nozzle 151 during paper picking and feeding is accurately synchronized. Furthermore, the switch trigger can be a metal part (such as iron or steel) that rotates synchronously with the camshaft 12. Once the switch trigger enters the sensing range of the proximity switch, the inductive proximity switch detects the presence of the metal object through electromagnetic induction and triggers a signal to control the start / stop or position synchronization of the paper picking / feeding action.

[0058] In other embodiments, such as Figure 1 , Figure 2 As shown, the paper feeding unit 1 also includes a rear stop 28 installed in the middle of the top surface of the support beam 21, two side-aligning paperboard slide rails 291 installed on both sides of the top surface of the support beam 21, and two side-aligning paperboards 29 respectively installed on the corresponding side-aligning paperboard slide rails 291.

[0059] In practice, the rear guide rail 28 ensures the accurate rear position of the paper, and the two side alignment plates 29 adjust the left and right rear position of the paper according to the paper size, thus limiting the paper's movement distance in the feeding direction during the paper feeding process. By adjusting the positions of the rear guide rail 28 and the two side alignment plates 29, the paper's feeding length and position can be precisely controlled.

[0060] In other embodiments, such as Figure 1 , Figure 2 As shown, the paper feeding unit 1 also includes an upper slide rail 23 installed on the inner side of each wall panel 2 and a lower slide rail 24 with a rack on the bottom surface, two slide rail bearings 25 installed on the outer side of each support side panel 22 and a gear 26 located below the two bearings 8, and the two slide rail bearings 25 are located between the corresponding upper slide rail 23 and lower slide rail 24, and the gear 26 meshes with the rack on the corresponding lower slide rail 24.

[0061] In practice, the paper feeding section 1 slides more smoothly back and forth by means of two slide rail bearings 25 sliding between the upper slide rail 23 and the lower slide rail 24, and the gear 26 engaging with the rack on the bottom surface of the lower slide rail 24.

[0062] In other embodiments, the paper feeding unit 1 further includes a slide rail locking block 27 and a locking handle installed on the top of each support side plate 22, and the upper slide rail 23 is inserted into the slide rail locking block 27.

[0063] In practice, after the paper feeding unit 1 slides back and forth along the upper slide rail 23 and the lower slide rail 24 to a suitable position, the position of each support side plate 22 is fixed by the slide rail locking block 27 and the locking handle, thereby fixing the position of the paper feeding unit 1 as a whole and preventing it from sliding.

[0064] In other embodiments, such as Figure 6 As shown, the paper feeding mechanism of the paper feeder of the die-cutting machine of this utility model also includes a baffle part 3 installed behind the paper feeding part 1; the baffle part 3 includes two round rods 31 installed between the left and right wall plates 2 and a lead screw 38 located between the two round rods 31, two reduction motors 32 respectively installed at both ends of the lead screw 38, two side guide fixing blocks 36 respectively fitted on both sides of the two round rods 31 and the lead screw 38, a side guide plate 35 and a three-axis cylinder 37 installed on each side guide fixing block 36, and the three-axis cylinder 37 is respectively connected to the outer side of the corresponding side guide plate 35.

[0065] In practical implementation, the two round rods 31 are key support components of the guide rail section 3. They are arranged parallel to each other vertically, providing stable support and rotation axis for other components. Two geared motors 32 drive two side guide fixing blocks 36 to slide left and right along the two round rods 31 via lead screws 38, thereby realizing the lateral movement of the two side guide plates 35 and precisely adjusting the spacing between the inner sides of the two side guide plates 35 according to paper size or process requirements. Two three-axis cylinders 37 drive the two side guide plates 35 to perform a rapid and powerful aligning action through air pressure, thereby ensuring that the paper is fully aligned before being fed into the next process.

[0066] In other embodiments, such as Figure 6 As shown, the stop section 3 also includes a front gauge fixing block 49 fitted between the two round rods 31 and the lead screw 38, a lifting reducer 39 installed above the front gauge fixing block 49, a motor cover 33 installed on the outer periphery of the lifting reducer 39, an upper bevel gear 40 installed on the output shaft of the lifting reducer 39, a rotating shaft fixing block 42 installed on the upper part of the front gauge fixing block 49, a front gauge slide rail 44 installed on the lower part of the front gauge fixing block 49, a slider 45 with internal threads installed in the front gauge slide rail 44, a rotating shaft 43 with external threads inserted into the slider 45 with internal threads and the rotating shaft fixing block 42, a lower bevel gear 41 installed on the top of the rotating shaft 43 with external threads, and a front gauge plate 34 installed on the slider 45 with internal threads, wherein the upper bevel gear 40 and the lower bevel gear 41 mesh with each other.

[0067] In practice, the lifting reducer 39 drives the upper bevel gear 40 to rotate. The upper bevel gear 40, through the meshing lower bevel gear 41, drives the externally threaded shaft 43 to rotate within the internally threaded slider 45. This drives the internally threaded slider 45 to move up and down along the front guide rail 44, thereby moving the front guide plate 34 on the internally threaded slider 45 up and down to the appropriate height. In particular, the design of the upper bevel gear 40 and the lower bevel gear 41 allows the rotational motion of the lifting reducer 39 to be converted into the vertical motion of the front guide plate 34, thereby achieving the lifting adjustment of the paper's leading edge and precise positioning in the vertical direction.

[0068] In other embodiments, the stop section 3 further includes a scale mounting plate 46 mounted on one side of the front guide rail 44, a scale 47 mounted on the scale mounting plate 46, and a pointer 48 mounted on one side of the front guide plate 34, with the pointer 48 located behind the scale 47.

[0069] In practice, scale 47 provides a measurement reference, while pointer 48 indicates the current position or degree of adjustment. Operators can observe the position of pointer 48 on scale 47 to check the lifting height of the front guide plate 34, and make fine adjustments to the front guide plate 34 to ensure accurate positioning of the paper during the die-cutting process.

[0070] As can be seen from the above, the paper feeding unit 1 of this utility model achieves precise paper adsorption, feeding, and positioning through the coordinated work of components such as the servo motor 11, left and right cams 121 and 120, rocker arm 141, swing arm 14, and suction nozzle 15. This system is typically used in highly automated equipment such as die-cutting machines and printing presses to improve production efficiency and processing accuracy. Figure 7 As shown, the paper feeding part 1 and the guide rail part 3 of this utility model are applied to the paper feeder of a die-cutting machine. The paper feeder of the die-cutting machine also includes a conveying part 5 located behind the guide rail part 3 and a paper feeding side alignment part 6 located behind the conveying part 5.

[0071] In summary, the paper feeding mechanism of the paper feeder of the die-cutting machine of this utility model uses negative pressure (suction) to stably grasp and move the paper. This design helps to ensure that the paper remains flat during the conveying process, reduces positioning errors caused by paper warping or slippage, and improves the overall production efficiency and processing quality of the die-cutting machine.

[0072] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, based on the ideas of this utility model, modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the ideas and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A downstacker paper feed mechanism for a die cutter paper feed machine, characterized by, The paper feeding part comprises a support beam between left and right wallboards, two support side plates respectively installed at the left and right ends of the support beam, two middle fixed plates symmetrically installed on the rear side of the support beam, a fixed shaft inserted in the two middle fixed plates, a power assembly installed at the right end of the fixed shaft, and a suction nozzle assembly installed between the two middle fixed plates. The suction nozzle assembly comprises two front and rear suction nozzle shaft sliding rails symmetrically installed on the inner side of the two middle fixed plates, two suction nozzle shaft sliding blocks respectively installed on the two suction nozzle shaft sliding rails, two suction nozzle shaft fixed blocks respectively installed on the inner side of the two suction nozzle shaft sliding blocks, a suction nozzle shaft installed between the two suction nozzle shaft fixed blocks, a plurality of suction nozzles uniformly installed on the top surface of the suction nozzle shaft, two suction nozzle swing arms having one end connected to the corresponding suction nozzle shaft fixed block through a corresponding suction nozzle connecting rod, and the other end of the two suction nozzle swing arms being respectively installed on the two sides of the fixed shaft. The power assembly drives the fixed shaft to swing forward and backward, thereby driving the suction nozzle to move forward and backward along the two suction nozzle shaft sliding rails with the two suction nozzle shaft sliding blocks.

2. The lower suction shoe feed mechanism of a die cutting machine feed mechanism according to claim 1, wherein, The power assembly comprises a servo motor installed below the support beam, a camshaft fixed plate installed on the support beam and located to the right of the right middle fixed plate, a camshaft inserted in the right middle fixed plate and the camshaft fixed plate, a gas distribution valve installed below the right middle fixed plate, and a swing frame and a rocker arm installed at the right end of the fixed shaft, and the gas source is connected to each suction nozzle through the gas distribution valve. The right end of the camshaft and the output shaft of the servo motor are connected through a synchronous belt; the left end of the camshaft and the transmission shaft of the gas distribution valve are connected through a chain; the middle part of the camshaft is provided with a left cam and a right cam, and the flanges of the left cam and the right cam are staggered. The swing frame is provided with a lower support arm, an upper front support arm and an upper rear support arm; the lower support arm is provided with a spring stopper; the upper front support arm is provided with a swing frame bearing; the swing frame bearing is located below the left cam and is in contact with the profile curve of the left cam; the upper rear support arm is connected to the middle part of the rocker arm. The top end of the rocker arm is provided with a rocker arm bearing; the rocker arm bearing is located behind the right cam and is in contact with the profile curve of the right cam; the bottom end of the rocker arm is provided with a support block; the front side of the support block is provided with a spring through a guide shaft; the spring is located behind the spring stopper. The contact between the flange of the left cam and the swing frame bearing, and the contact between the flange of the right cam and the rocker arm bearing, are alternately performed, thereby driving the fixed shaft to swing synchronously forward and backward.

3. A kiss cut lower suction pick-up mechanism for a die cutter according to claim 2, wherein, The paper feeding part further comprises a reset assembly installed at the left end of the fixed shaft; the reset assembly comprises a reset spring swing arm having one end installed on the left end of the fixed shaft, and the other end of the reset spring swing arm being connected to the rear side of the support beam through a reset spring.

4. A kiss cut lower suction jaw feed mechanism for a die cutter as claimed in claim 2 or 3, wherein, The paper feeding part further comprises a proximity switch installed on the outer side of the camshaft fixed plate and located behind the right end of the camshaft, and a switch trigger installed at the right end of the camshaft.

5. A kiss cut lower suction pick-up mechanism for a die cutter according to any one of claims 1-3, wherein, The suction nozzle assembly further comprises a suction nozzle connecting plate installed on the bottom surface of the middle two suction nozzles, a suction nozzle sliding block installed on the bottom surface of the suction nozzle connecting plate, a suction nozzle sliding rail inserted in the suction nozzle sliding block, a suction nozzle sliding rail mounting seat installed on the rear side of the support beam, and the two ends of the suction nozzle sliding rail being installed in the suction nozzle sliding rail mounting seat.

6. A kiss cut lower suction pick-up mechanism for a die cutter according to any one of claims 1-3, wherein, The paper feeding part further comprises upper slide rails installed on the inner side of each wall plate, lower slide rails with a rack on the bottom surface, two slide rail bearings installed on the outer side of each support side plate, and a gear below the two bearings, and the two slide rail bearings are located between the corresponding upper slide rail and lower slide rail, and the gear is engaged with the rack on the corresponding lower slide rail.

7. A kiss cut lower suction pick-up mechanism for a die cutter according to any one of claims 1-3, wherein, The paper feeding part further comprises a rear stop gauge installed on the top surface of the support cross beam, two side paper alignment rails installed on both sides of the top surface of the support cross beam, and two side paper alignment plates respectively installed on the corresponding side paper alignment rails.

8. A kiss cut lower suction pick-up mechanism for a die cutter according to any one of claims 1-3, wherein, The paper feeding part further comprises a stop gauge part installed behind the paper feeding part; the stop gauge part comprises two round rods installed between the left and right wall plates, a lead screw between the two round rods, two reduction motors respectively installed on both ends of the lead screw, two side gauge fixing blocks respectively sleeved on both sides of the two round rods and the lead screw, a side gauge plate and a three-axis air cylinder respectively installed on each side gauge fixing block, and the three-axis air cylinder is connected to the outer side of the corresponding side gauge plate.

9. A kiss cut lower suction pick-up mechanism for a die cutter according to claim 8, wherein, The stop gauge part further comprises a front gauge fixing block sleeved between the two round rods and the lead screw, a lifting reduction machine installed above the front gauge fixing block, an upper bevel gear installed on the output shaft of the lifting reduction machine, a rotating shaft fixing block installed on the upper part of the front gauge fixing block, a front gauge slide rail installed on the lower part of the front gauge fixing block, a sliding block with internal threads installed in the front gauge slide rail, a rotating shaft with external threads inserted into the sliding block with internal threads and the rotating shaft fixing block, a lower bevel gear installed on the top end of the rotating shaft with external threads, and a front gauge plate installed on the sliding block with internal threads, and the upper bevel gear and the lower bevel gear are engaged with each other.

10. The lower suction shoe feed mechanism of a die cutting machine feed mechanism according to claim 8, wherein, The stop gauge part further comprises a scale installation plate installed on one side of the front gauge slide rail, a scale installed on the scale installation plate, and a pointer installed on one side of the front gauge plate, and the pointer is located behind the scale.

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