Full-automatic production equipment for internally-separated and stacked napkins

Abstract

The invention belongs to the technical field of napkin production equipment, and discloses full-automatic production equipment for internally-separated and stacked napkins, the full-automatic production equipment comprises a feeding frame, a first rack and a second rack which are sequentially arranged in the X-axis direction, a paper material sequentially penetrates through the feeding frame, the first rack and the second rack in the X-axis direction, a feeding device is mounted on the feeding frame, and a discharging device is mounted on the second rack. A printing device, a slitting device and a folding device which are sequentially arranged in the X-axis direction are installed on the first rack, and a cutting device, a folding device and a discharging device are installed on the second rack. According to the napkin post-processing and packaging device, integrated configuration of the whole post-processing procedure is achieved, full-automatic operation of napkin post-processing and packaging procedures is achieved, manual participation is not needed, the napkin processing efficiency is greatly improved, and the product quality and safety of napkins are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of napkin production equipment, and in particular to a fully automatic production equipment for inner-folded napkins. Background Art

[0002] As a daily consumer product, the production process and flow of napkins need to balance efficiency, quality, and cost control. Its production process can be divided into raw material pretreatment, pulping and modulation, paper machine forming, post-processing, and packaging. Among them, the post-processing and packaging step mainly includes steps such as printing, slitting, folding, cutting, doubling, discharging, and packaging.

[0003] In the Chinese utility model patent with the patent application number 202323516332.9, a tissue production embossing and folding machine is proposed. This patent realizes the automatic embossing, folding, and splitting of tissues. The main problems of this patent are: this patent can only perform the folding work of shaping the tissues, while generally, after napkins are cut into pieces, they need to be doubled once. This patent requires an additional independent folding and splitting device to achieve this, which not only slows down the production efficiency of napkins but also increases the additional investment in equipment purchase costs. Moreover, for traditional folding and splitting equipment, napkins are output in rows, and manual participation is required to stack and package them, which is not only inefficient but also unhygienic, affecting the product quality and safety of napkins. Summary of the Invention

[0004] The main technical problem to be solved by the present invention is to provide a fully automatic production equipment for inner-folded napkins, which realizes an integrated configuration of the entire post-processing process, realizes the full automation of the post-processing and packaging processes of napkins, eliminates the need for manual participation, greatly improves the processing efficiency of napkins, and ensures the product quality and safety of napkins.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A fully automatic production equipment for inner-folded napkins, including a loading rack, a first rack, and a second rack arranged in sequence along the X-axis direction. The paper material passes through the loading rack, the first rack, and the second rack in sequence along the X-axis direction. A loading device is installed on the loading rack, and a printing device, a slitting device, and a folding device arranged in sequence along the X-axis direction are installed on the first rack. A cutting device, a doubling device, and a discharging device are installed on the second rack; The cutting device includes a paper feeding suction roller, a lower cutting roller, and a paper discharging suction roller that are sequentially arranged along the paper feeding direction. The paper feeding suction roller, the lower cutting roller, and the paper discharging suction roller are all rotatably installed on the second frame. The paper material sequentially bypasses the paper feeding suction roller, the lower cutting roller, and the paper discharging suction roller along an S-shaped route. An obliquely arranged upper cutting roller is provided above the lower cutting roller. The upper cutting roller and the lower cutting roller cooperate to perform knife alignment cutting on the paper material. One end of the upper cutting roller is rotatably installed on the second frame and is connected with a knife lifting component; The folding device includes a folding component and a paper blocking component arranged below the paper discharging suction roller. The folding component folds the napkins in the X-axis direction and is driven by a reciprocating driving component to perform reciprocating motion. The paper blocking component is arranged on the discharging side of the paper discharging suction roller; The discharging device includes a material receiving component and an intermediate supporting component arranged below the folding component. A feeding component is connected at the discharging position of the material receiving component. A two-way discharging conveyor is connected at the conveying end of the feeding component.

[0006] The following is a further optimization of the above technical solution by the present invention: The folding component includes a plurality of fork-shaped members that are sequentially arranged at intervals along the Y-axis direction. The ends of all the fork-shaped members away from the paper discharging suction roller are commonly fixed on a folding shaft rod. The folding shaft rod extends along the Y-axis direction and is rotatably installed inside the second frame. A plurality of annularly arranged slots are sequentially arranged at intervals along the axial direction on the peripheral wall of the paper discharging suction roller. The slots and the fork-shaped members are arranged in one-to-one correspondence. The other ends of the fork-shaped members are all inserted into the corresponding slots.

[0007] Further optimization: The reciprocating driving component includes a first crank arm and a first rocker arm that are hinged together. The paper discharging suction roller drives the first crank arm to rotate through a second gear transmission component. The end of the first rocker arm away from the first crank arm is fixedly connected to the folding shaft rod.

[0008] Further optimization: A counter for counting the number of napkins falling is installed on the second frame. The paper discharging suction roller is in transmission connection with the input shaft of the counter through a second belt transmission component.

[0009] Further optimization: The paper blocking component includes a plurality of paper blocking rods that are sequentially arranged at intervals along the Y-axis direction. The paper blocking rods and the fork-shaped members are arranged in an alternating manner. Each paper blocking rod is arranged between two adjacent slots. The ends of the paper blocking rods away from the paper discharging suction roller are commonly fixed on a paper blocking cross beam. The paper blocking cross beam extends along the Y-axis direction and is fixed at both ends on the second frame.

[0010] Further optimization: The material receiving component includes a material receiving cross beam that is slidably installed inside the second frame along the Z-axis direction. The material receiving cross beam is driven by a first lifting driving mechanism to move in the Z-axis direction. A plurality of material receiving claws that are sequentially arranged at intervals along the Y-axis direction are fixed on the rear side wall of the material receiving cross beam. The material receiving claws are arranged directly below the folding component.

[0011] Further optimization: The middle supporting component includes a lifting frame slidably mounted inside the second rack along the Z-axis direction. The lifting frame is driven by a second lifting driving mechanism to move in the Z-axis direction. A translation cross beam is slidably mounted on the lifting frame along the X-axis direction. A plurality of receiving claws are fixedly arranged on the rear side wall of the translation cross beam at intervals along the Y-axis direction. The receiving claws are arranged on the front side of the material receiving claws, and all the receiving claws and the material receiving claws are arranged in an interleaved manner.

[0012] Further optimization: A fourth driving motor is fixedly installed at the front end of the lifting frame. A second crank arm and a second rocker arm are jointly arranged between the fourth driving motor and the translation cross beam. One end of the second crank arm is fixedly connected to the motor shaft of the fourth driving motor. The other end of the second crank arm is hinged to one end of the second rocker arm, and the other end of the second rocker arm is hinged to the translation cross beam.

[0013] Further optimization: The lower cutting roller extends along the Y-axis direction. A plurality of lower cutting knives are fixedly arranged at equal intervals along the axial direction on the peripheral wall of the lower cutting roller. An upper cutting knife is fixedly arranged at the lower position on the peripheral wall of the upper cutting roller. The upper cutting knife extends along the axis direction of the upper cutting roller. The cutting edge of the upper cutting knife is a spiral twisted plate-shaped cutting edge, and the shape of the cutting edge of the upper cutting knife is adapted to the cutting path of the lower cutting knife.

[0014] Further optimization: The knife lifting component includes a knife lifting oil cylinder arranged outside the second rack. The cylinder body of the knife lifting oil cylinder is hinged to the outer wall of the second rack. A knife lifting arm is arranged between the piston rod of the knife lifting oil cylinder and the shaft rod of the upper cutting roller. One end of the knife lifting arm is fixedly installed on the shaft rod of the upper cutting roller, and the other end of the knife lifting arm is hinged to the piston rod of the knife lifting oil cylinder.

[0015] The present invention adopts the above technical solutions and has the following beneficial effects: The present invention internally arranges the folding device for napkins, realizes an integrated configuration for all post-processing procedures of napkins, and there is no need to additionally add equipment for folding napkins. Thus, the entire post-processing procedure of napkins can be fully automated inside the equipment without manual participation. This not only solves the problem of slow production efficiency caused by excessive manual participation, realizes the high-efficiency and high-quality production of napkins, reduces the labor and equipment cost input in the entire production process, but also avoids the problem of affecting the product quality and safety of napkins due to manual participation. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative labor, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the overall structure in the embodiment of the present invention; Figure 2 Schematic diagram of the installation structure of the second rack in the embodiment of the present invention; Figure 3 For Figure 2 Front view schematic diagram; Figure 4 For Figure 3 Rear view schematic diagram; Figure 5 For Figure 4 Top view schematic diagram; Figure 6 For Figure 5 Cross-sectional view taken along the A-A direction in Figure 7 Schematic diagram of the cooperation between the stacking device and the paper output suction roller in the embodiment of the present invention; Figure 8 For Figure 7 Bottom view schematic diagram; Figure 9 Schematic diagram of the structure of the discharging device in the embodiment of the present invention; Figure 10 Schematic diagram of the cooperation between the upper cutting roller and the lower cutting roller in the embodiment of the present invention; Figure 11 Schematic diagram of the structure of the lower cutting roller in the embodiment of the present invention; Figure 12 Schematic diagram of the structure of the loading rack in the embodiment of the present invention; Figure 13 For Figure 12 Bottom view schematic diagram; Figure 14 For Figure 13 Cross-sectional view taken along the B-B direction in Figure 15 Schematic diagram of the structure of the first rack in the embodiment of the present invention; Figure 16 For Figure 15 Front view schematic diagram; Figure 17 For Figure 16 Cross-sectional view taken along the C-C direction in Figure 18 Schematic diagram of the structure of the printing device in the embodiment of the present invention; Figure 19 is Figure 18 the front view schematic diagram; Figure 20 is the structural schematic diagram of the slitting device and the folding device in the embodiment of the present invention.

[0018] In the figure: 1. Loading rack; 101. Circular paper roll; 102. Support shaft; 103. Limit block; 104. Support roller; 2. First frame; 201. First driving motor; 202. Sixth driving motor; 203. First transmission shaft; 204. Fifth belt transmission component; 205. Sixth belt transmission component; 206. Third gear transmission component; 207. Second transmission shaft; 208. Seventh belt transmission component; 209. Eighth belt transmission component; 3. Second frame; 301. Reducer; 302. First belt transmission component; 303. First gear transmission component; 4. Paper feeding suction roller; 5. Lower cutting roller; 501. Lower cutter; 6. Paper discharging suction roller; 601. Slot; 7. Upper cutting roller; 701. Upper cutter; 8. Knife lifting component; 801. Knife lifting oil cylinder; 802. Knife lifting arm; 9. Folding component; 901. Fork; 902. Folding shaft rod; 10. Paper blocking component; 1001. Paper blocking rod; 1002. Paper blocking cross beam; 11. Reciprocating driving component; 1101. First crank arm; 1102. First rocker arm; 1103. Second gear transmission component; 1104. Counter; 1105. Second belt transmission component; 12. Material receiving component; 1201. Material receiving cross beam; 1202. Material receiving claw; 1203. Second driving motor; 1204. Third belt transmission component; 13. Middle supporting component; 1301. Lifting frame; 1302. Translating cross beam; 1303. Supporting claw; 1304. Third driving motor; 1305. Fourth belt transmission component; 1306. Fourth driving motor; 1307. Second crank arm; 1308. Second rocker arm; 14. Feeding component; 1401. Feeding rack; 1402. Conveyor belt; 15. Bidirectional discharging conveyor; 16. Pushing component; 1601. Truss; 1602. Z-direction oil cylinder; 1603. X-direction oil cylinder; 1604. Pushing plate; 17. Loading component; 1701. Loading arm; 1702. First hinge shaft; 1703. Loading oil cylinder; 1704. Shaft placing groove; 18. Traction assembly; 1801. Traction frame; 1802. Driving roller; 1803. Driven roller; 1804. Fifth drive motor; 1805. Second hinge shaft; 1806. Adjusting oil cylinder; 1807. Slide seat; 1808. First adjusting screw 19. First wall panel; 1901. Slide cavity; 1902. Upper mounting seat; 1903. Lower mounting seat 20. Upper printing roller 21. Lower printing roller 22. Gap adjusting assembly; 2201. Upper wedge block; 2202. Lower wedge block; 2203. Second adjusting screw 23. Lifting assembly; 2301. Lifting oil cylinder; 2302. Lifting arm; 2303. Pulling arm 24. Second wall panel 25. Slitting assembly; 2501. Slitting shaft rod; 2502. Slitting roller; 2503. Slitting gap 26. Slitting knife 27. Position adjusting seat 28. Position adjusting assembly; 2801. Third adjusting screw; 2802. Adjusting handle; 2803. Threaded section; 29. Folding assembly 29. Folding assembly; 2901. Guide paper inclined plate; 2902. Connecting arm; 2903. Paper stacking bottom plate; 2904. Paper stacking upper plate; 2905. Connecting frame 30. Pressing assembly; 3001. Front pressing roller; 3002. Rear pressing roller Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figures 1 - 20 Collectively shown, an automatic production device for inner-folded napkins includes a loading rack 1, a first rack 2, and a second rack 3 arranged in sequence along the X-axis direction. The paper material passes through the loading rack 1, the first rack 2, and the second rack 3 in sequence along the X-axis direction. A loading device is installed on the loading rack 1, and a printing device, a slitting device, and a folding device arranged in sequence along the X-axis direction are installed on the first rack 2. A cutting device, a folding device, and an unloading device are installed on the second rack 3.

[0021] In the present invention, an automated folding device dedicated to the folding of napkins is innovatively built-in, eliminating the need to purchase additional napkin folding equipment, significantly reducing the labor and equipment cost expenditures in the production process, and remarkably enhancing the economic benefits of napkin production.

[0022] Meanwhile, all the post-processing procedures of the napkins are integrated into one, and the entire fully automated processing flow of the post-processing procedures of the napkins can be completed inside the equipment. There is no need for manual intervention throughout the process, achieving truly efficient, precise, and unmanned production.

[0023] Thus, the problem of low production efficiency of napkins caused by excessive manual intervention is effectively solved, achieving the production goals of high efficiency and high quality of napkins. At the same time, the potential risks that manual participation may bring to the quality and safety of napkin products are also avoided, effectively ensuring the quality and safety of the finished napkins.

[0024] As Figures 1 - 6 As commonly shown, the cutting device includes a paper feeding suction roller 4, a lower cutting roller 5, and a paper discharging suction roller 6 arranged in sequence along the paper material conveying direction. The paper feeding suction roller 4, the lower cutting roller 5, and the paper discharging suction roller 6 are all rotatably installed on the second frame 3.

[0025] In this embodiment, a plurality of suction holes for adsorbing napkins are provided on the circumferential walls of the paper feeding suction roller 4 and the paper discharging suction roller 6, and an air suction source (not shown in the figure) is connected to the inside of both the paper feeding suction roller 4 and the paper discharging suction roller 6.

[0026] In this embodiment, the adsorption principle of the suction holes on the paper feeding suction roller 4 and the paper discharging suction roller 6 and the internal structure thereof both constitute the prior art and are well-known to those of ordinary skill in the art, so they will not be elaborated here.

[0027] As Figures 2 - 4 As commonly shown, a first driving motor 201 is installed on the outside of the first frame 2, a speed reducer 301 is fixedly installed on the outside of the second frame 3. The input end of the speed reducer 301 is in transmission connection with the output end of the first driving motor 201, and the output end of the speed reducer 301 is in transmission connection with the lower cutting roller 5 through a first belt transmission assembly 302. The lower cutting roller 5 drives the paper feeding suction roller 4 and the paper discharging suction roller 6 to rotate through a first gear transmission assembly 303.

[0028] In this embodiment, the paper feeding suction roller 4 rotates in the same direction as the lower cutting roller 5, and the paper discharging suction roller 6 rotates in the opposite direction to the lower cutting roller 5.

[0029] As Figure 2 and Figure 6As shown together, the paper stock sequentially bypasses the paper feeding suction roller 4, the lower cutting roller 5, and the paper discharging suction roller 6 along an S-shaped route. An upper cutting roller 7 is obliquely arranged above the lower cutting roller 5, and the upper cutting roller 7 and the lower cutting roller 5 cooperate to perform knife alignment cutting on the paper stock.

[0030] As Figures 1 - 6 As shown together, the lower cutting roller 5 extends along the Y-axis direction, and a plurality of lower cutting blades 501 are fixedly arranged on the peripheral wall of the lower cutting roller 5 at equal intervals along the axial direction. An upper cutting blade 701 is fixedly arranged at a lower position on the peripheral wall of the upper cutting roller 7, and the upper cutting blade 701 extends along the axial direction of the upper cutting roller 7.

[0031] As Figure 10 and Figure 11 As shown together, the cutting edge of the upper cutting blade 701 is a helically twisted plate-shaped cutting edge, and the shape of the cutting edge of the upper cutting blade 701 is adapted to the cutting path of the lower cutting blade 501.

[0032] In this embodiment, the upper cutting blade 701 is obliquely and helically arranged, reducing the stress on the upper cutting blade 701 and the lower cutting blade 501 during cutting, avoiding the continuous occurrence of rattling sounds during the cutting process, and thus extending the service life of the upper cutting blade 701 and the lower cutting blade 501.

[0033] As Figure 2 and Figure 3 As shown together, one end of the upper cutting roller 7 is rotatably installed on the second frame 3 and is connected with a knife lifting assembly 8.

[0034] Among them, the knife lifting assembly 8 includes a knife lifting oil cylinder 801 arranged outside the second frame 3. The cylinder body of the knife lifting oil cylinder 801 is hinged and installed on the outer wall of the second frame 3. A knife lifting arm 802 is arranged between the piston rod of the knife lifting oil cylinder 801 and the shaft rod of the upper cutting roller 7. One end of the knife lifting arm 802 is fixedly installed on the shaft rod of the upper cutting roller 7, and the other end of the knife lifting arm 802 is hinged and connected with the piston rod of the knife lifting oil cylinder 801.

[0035] In this embodiment, the setting of the knife lifting assembly 8 is used to perform intermittent reciprocating adjustment on the upper cutting blade 701 in the Z-axis direction, avoiding the situation of accidental injury caused by the contact between the upper cutting blade 701 and the paper stock.

[0036] As Figures 6 - 8 As shown together, the folding device includes a folding assembly 9 and a paper blocking assembly 10 arranged below the paper discharging suction roller 6. The folding assembly 9 folds the napkin paper in the X-axis direction and is driven by a reciprocating driving assembly 11 to perform reciprocating motion. The paper blocking assembly 10 is arranged on the discharging side of the paper discharging suction roller 6.

[0037] In this embodiment, the folding assembly 9 is used to fold the napkin paper adsorbed on the paper discharging suction roller 6 in the X-axis direction.

[0038] Moreover, the folding assembly 9 and the paper blocking assembly 10 cooperate to play a role. They can not only limit the rear end of the napkin, ensuring the smooth progress of the napkin folding process, but also prevent the napkin from continuing to rotate with the paper output suction roller 6, peeling the folded napkin from the paper output suction roller 6, making it fall onto the lower discharging device, and realizing the automatic transmission to the packaging equipment.

[0039] As Figures 1 - 8 collectively shown, the folding assembly 9 includes a plurality of fork-shaped members 901 arranged at intervals in the Y-axis direction in sequence.

[0040] In this embodiment, the fork-shaped member 901 is arranged in an S shape.

[0041] As Figure 7 and Figure 8 collectively shown, one ends of all the fork-shaped members 901 away from the paper output suction roller 6 are fixedly connected to a folding shaft rod 902 in common. The folding shaft rod 902 extends in the Y-axis direction and is rotatably installed in the second frame 3. A plurality of annular slots 601 are arranged at intervals along the axial direction on the peripheral wall of the paper output suction roller 6. The slots 601 are arranged in one-to-one correspondence with the fork-shaped members 901, and the other ends of the fork-shaped members 901 are inserted into the corresponding slots 601.

[0042] As Figure 4 and Figure 7 collectively shown, the reciprocating driving assembly 11 includes a first crank arm 1101 and a first rocker arm 1102 which are hinged together. The paper output suction roller 6 drives the first crank arm 1101 to rotate through a second gear transmission assembly 1103. One end of the first rocker arm 1102 away from the first crank arm 1101 is fixedly connected to the folding shaft rod 902.

[0043] As Figure 2 、 Figure 3 and Figure 8 collectively shown, a counter 1104 for counting the number of napkins falling is installed on the second frame 3. The paper output suction roller 6 is in transmission connection with the input shaft of the counter 1104 through a second belt transmission assembly 1105.

[0044] In this embodiment, the counter 1104 calculates the number of napkins falling according to the number of rotation circles of the paper output suction roller 6, and controls the action of the discharging device according to the counting of the counter 1104.

[0045] As Figure 7 and Figure 8As commonly shown, the paper blocking assembly 10 includes a plurality of paper blocking rods 1001 arranged at intervals in the Y-axis direction. The paper blocking rods 1001 are arranged in a staggered manner with the fork 901 one by one. Each paper blocking rod 1001 is arranged between two adjacent slots 601. The ends of the paper blocking rods 1001 far from the paper outlet suction roller 6 are commonly fixed on a paper blocking cross beam 1002. The paper blocking cross beam 1002 extends in the Y-axis direction and fixes both ends on the second frame 3.

[0046] In this embodiment, the core function of the paper blocking rod 1001 is to accurately limit the rear end of the napkin.

[0047] On the one hand, it can cooperate with the fork 901 to jointly complete the folding operation of the napkin, ensuring that the folding process is stable and meets the process requirements; on the other hand, it can effectively prevent the napkin from continuously rotating upward with the paper outlet suction roller 6, and then smoothly peel the napkin from the circumferential wall of the paper outlet suction roller 6, laying a foundation for the subsequent process.

[0048] As Figure 2 and Figure 9 As commonly shown, the discharging device includes a material receiving component 12 and an intermediate supporting component 13 arranged below the folding component 9. A feeding component 14 is connected at the discharging position of the material receiving component 12, and a two-way discharging conveyor 15 is connected at the conveying end of the feeding component 14.

[0049] As Figure 2 、 Figure 3 、 Figure 4 and Figure 9 As commonly shown, the material receiving component 12 includes a material receiving cross beam 1201 slidably installed inside the second frame 3 in the Z-axis direction. The material receiving cross beam 1201 is driven by a first lifting driving mechanism to move in the Z-axis direction. A plurality of material receiving claws 1202 arranged at intervals in the Y-axis direction are fixed on the rear side wall of the material receiving cross beam 1201. The material receiving claws 1202 are arranged directly below the folding component 9.

[0050] In this embodiment, the first lifting driving mechanism includes a second driving motor 1203 fixed on the outside of the second frame 3. The second driving motor 1203 drives the material receiving cross beam 1201 to perform lifting actions in the Z-axis direction through a third belt transmission component 1204.

[0051] Among them, the middle support component 13 includes a lifting frame 1301 slidably installed inside the second rack 3 in the Z-axis direction. The lifting frame 1301 is driven by a second lifting drive mechanism to move in the Z-axis direction. A translation cross beam 1302 is slidably installed on the lifting frame 1301 in the X-axis direction. A number of receiving claws 1303 are fixed on the rear side wall of the translation cross beam 1302 at intervals in the Y-axis direction. The receiving claws 1303 are arranged on the front side of the material receiving claw 1202, and all the receiving claws 1303 and the material receiving claw 1202 are arranged in a staggered manner.

[0052] In this embodiment, the second lifting drive mechanism includes a third drive motor 1304 fixed on the second rack 3. The third drive motor 1304 drives the translation cross beam 1302 to perform lifting actions in the Z-axis direction through a fourth belt transmission component 1305.

[0053] As Figure 2 and Figure 9 Collectively shown, a fourth drive motor 1306 is fixedly installed at the front end of the lifting frame 1301. A second crank arm 1307 and a second rocker arm 1308 are jointly arranged between the fourth drive motor 1306 and the translation cross beam 1302. One end of the second crank arm 1307 is fixedly connected to the motor shaft of the fourth drive motor 1306. The other end of the second crank arm 1307 is hinged to one end of the second rocker arm 1308. The other end of the second rocker arm 1308 is hinged to the translation cross beam 1302.

[0054] As Figure 9 Shown, the feeding component 14 includes a feeding frame 1401 extending in the X-axis direction. A number of conveyor belts 1402 are rotatably installed on the feeding frame 1401 at intervals in the Y-axis direction. The feeding end of the conveyor belt 1402 is connected to the feeding front ends of the two conveying directions of the two-way discharging conveyor 15.

[0055] In this embodiment, the installation structure and driving principle of the conveyor belt 1402, as well as the structure and working principle of the two-way discharging conveyor 15, all belong to the prior art and are well known to those of ordinary skill in the art, and will not be elaborated here.

[0056] As Figure 3 and Figure 4 Collectively shown, a pushing component 16 is arranged above the rear end of the feeding component 14.

[0057] The pushing component 16 includes a truss 1601 fixed on the second rack 3. Two Z-direction oil cylinders 1602 are fixed on the truss 1601. An X-direction oil cylinder 1603 is installed on the piston rod of each Z-direction oil cylinder 1602. A pushing plate 1604 is fixed on the piston rod of each X-direction oil cylinder 1603.

[0058] In this embodiment, the paper stock for processing napkins is wound into a large-diameter circular paper roll 101.

[0059] As Figure 1 and Figure 12 collectively shown, a loading device is installed on the loading rack 1, and the loading device is used to lift and place the circular paper roll 101 of the napkins at a fixed position on the loading rack 1.

[0060] As Figure 1 and Figure 12 collectively shown, the loading device includes a loading component 17 provided at the front end of the loading rack 1, which is used for quickly loading the circular paper roll 101 without the need for manual lifting for loading.

[0061] Among them, the loading component 17 includes two loading arms 1701 respectively provided on both sides of the loading rack 1. The lower ends of the two loading arms 1701 are rotatably installed at the lower end of the front side of the loading rack 1 through a first hinge shaft 1702. The middle of each loading arm 1701 is jointly hinged and installed with a loading oil cylinder 1703 on the outer wall of the loading rack 1, and a shaft placement groove 1704 is provided on the rear wall of the upper end of each loading arm 1701.

[0062] In this embodiment, since a support shaft 102 passes through the axis of the circular paper roll 101, the two shaft placement grooves 1704 are respectively used to place the two ends of the support shaft 102.

[0063] In the present invention, the installation structure of the circular paper roll 101 on the support shaft 102 is prior art and is well known to those of ordinary skill in the art, and will not be elaborated here.

[0064] At the same time, an L-shaped limit block 103 is fixed at the upper ends of the two side walls of the loading rack 1. An opening is provided at the front end of the limit block 103. When the loading arm 1701 rotates to the rearmost position, the size and height of the opening of the shaft placement groove 1704 are adapted to the opening on the front side of the limit block 103, so that the support shaft 102 can smoothly roll from the shaft placement groove 1704 onto the limit block 103.

[0065] Moreover, a support roller 104 is rotatably installed at the top of both side walls of the loading rack 1. The axis of the support roller 104 extends along the X-axis direction, and the height of the support roller 104 is adapted to the height of the opening on the limit block 103.

[0066] In this embodiment, the peripheral wall of the support shaft 102 presses on the inner wall of the opening on the limit block 103 and the peripheral wall of the support roller 104, and can rotate on its own within the opening and on the support roller 104.

[0067] As Figures 12 - 14As shown together, the feeding device further includes a traction assembly 18 disposed at the lower end inside the feeding rack 1. The traction assembly 18 is used to traction the paper material of the napkin forward and enable the paper material to be output in a proper direction.

[0068] As Figure 12 and Figure 14 As shown together, the traction assembly 18 includes a traction rack 1801 disposed inside the feeding rack 1. An active roller 1802 and a driven roller 1803 are respectively rotatably installed at both ends of the traction rack 1801. The active roller 1802 is drivingly connected to a fifth driving motor 1804.

[0069] As Figure 13 and Figure 14 As shown together, both the rear end of the active roller 1802 and the traction rack 1801 are rotatably installed on the feeding rack 1 through a second hinge shaft 1805. An adjusting oil cylinder 1806 is jointly hinged and installed between the rear end of the traction rack 1801 and the feeding rack 1. The adjusting oil cylinder 1806 is disposed below the traction rack 1801, and its hinge point with the traction rack 1801 is located below the second hinge shaft 1805.

[0070] As Figure 12 As shown, both ends of the driven roller 1803 are respectively rotatably installed on a sliding seat 1807. Each sliding seat 1807 is slidably installed at the front end of the traction rack 1801 along the X-axis direction. A first adjusting screw 1808 is rotatably installed on the sliding seat 1807, and the first adjusting screw 1808 is installed on the traction rack 1801 in a threaded connection manner.

[0071] In this embodiment, by setting the adjusting oil cylinder 1806 and the hinged traction rack 1801, the staff can freely adjust the tension of the paper material according to the actual situation to ensure that the paper material obtains sufficient tension during traction, which not only avoids problems such as paper material deviation, uneven surface or large slitting deviation caused by paper material relaxation, but also avoids the occurrence of paper breakage caused by excessive paper material tension.

[0072] As Figures 15 - 19 As shown together, the printing device includes two first wallboards 19 fixed to the top of the first rack 2. A printing upper roller 20 and a printing lower roller 21 are disposed between the first wallboards 19. The printing upper roller 20 and the printing lower roller 21 both extend along the Y-axis direction and are rotatably installed on the first wallboards 19. A printing gap (not shown in the figure) is formed between the printing upper roller 20 and the printing lower roller 21. The paper material passes through the printing gap along the X-axis direction to realize the automatic printing work of the paper material.

[0073] As Figures 15 - 17As commonly shown, a sixth driving motor 202 and a first transmission shaft 203 are installed inside the first frame 2. The sixth driving motor 202 drives the first transmission shaft 203 to rotate through a fifth belt transmission assembly 204. The first transmission shaft 203 drives the printing upper roller 20 to rotate through a sixth belt transmission assembly 205. The printing upper roller 20 drives the printing lower roller 21 to rotate through a third gear transmission assembly 206.

[0074] As Figures 18 - 19 As commonly shown, each first wallboard 19 is provided with a sliding cavity 1901 extending in the Z-axis direction. An upper mounting seat 1902 and a lower mounting seat 1903 are arranged up and down in each sliding cavity 1901. Both ends of the printing upper roller 20 are rotatably mounted on the upper mounting seat 1902, and both ends of the printing lower roller 21 are rotatably mounted on the lower mounting seat 1903.

[0075] Among them, the size of the printing gap is manually adjusted through a gap adjusting assembly 22, so that the printing device in the present invention can be adapted to the production and processing of napkins with different thicknesses, ensuring the clarity and integrity of the patterns printed on the napkins.

[0076] As Figure 16 and Figure 17 As commonly shown, the gap adjusting assembly 22 includes an upper wedge block 2201 and a lower wedge block 2202 arranged up and down. The upper wedge block 2201 is fixedly mounted on the bottom of the upper mounting seat 1902. The lower wedge block 2202 is slidably mounted on the top of the lower mounting seat 1903 in the X-axis direction. The inclined surface at the bottom of the upper wedge block 2201 and the inclined surface at the top of the lower wedge block 2202 have opposite inclined directions and are in contact with each other. A second adjusting screw 2203 is jointly arranged between the lower wedge block 2202 and the corresponding first wallboard 19. The second adjusting screw 2203 extends in the X-axis direction. The second adjusting screw 2203 is threadedly connected to the lower wedge block 2202 and rotatably connected to the first wallboard 19.

[0077] To Figure 17 shown as an example, the method for adjusting the printing gap is described as follows: When it is necessary to increase the printing gap, the second adjusting screw 2203 is rotated to move the lower wedge block 2202 in the direction opposite to the paper material conveying direction. The top inclined surface of the lower wedge block 2202 pushes the upper wedge block 2201 upward, realizing the lifting of the printing upper roller 20, and the printing gap is increased.

[0078] When it is necessary to reduce the printing gap, the lower wedge block 2202 is moved in the paper feeding direction by reversely rotating the second adjusting screw rod 2203. The upper wedge block 2201 loses the upward thrust and will fall downward under the action of its own gravity, and the bottom inclined plane always adheres to the top inclined plane of the lower wedge block 2202, realizing the downward movement of the printing upper roller 20 and reducing the printing gap.

[0079] As Figure 18 and Figure 19 collectively shown, a lifting assembly 23 is jointly provided between the printing upper roller 20 and the first wallboard 19 for lifting the height of the printing upper roller 20.

[0080] Among them, the lifting assembly 23 includes two lifting oil cylinders 2301 extending in the Z-axis direction. The cylinder body of the lifting oil cylinder 2301 is hinged and installed on the first wallboard 19. A lifting arm 2302 is jointly hinged between the piston rod of the lifting oil cylinder 2301 and the top of the first wallboard 19. A pulling arm 2303 is jointly hinged and installed between the lifting arm 2302 and the mounting upper seat 1902.

[0081] When the napkin paper to be produced does not need printing, control the piston rod of the lifting oil cylinder 2301 to extend outwards, drive the free end of the lifting arm 2302 to lift upwards, and further drive the mounting upper seat 1902 to lift upwards, so that the printing upper roller 20 is far away from the printing lower roller 21. In this state, when the paper passes through the inside of the printing gap, it will not contact the printing upper roller 20 and the printing lower roller 21, thus avoiding the printing operation.

[0082] Therefore, the present invention is not only applicable to the production of napkin paper that needs printing processing, but also can be flexibly applied to the processing and production of napkin paper without the printing process, and has wide applicability.

[0083] As Figures 15 - 17 and Figure 20 collectively shown, the slitting device includes two relatively arranged second wallboards 24. A slitting assembly 25 and a slitting knife 26 are installed up and down between the two second wallboards 24.

[0084] As Figure 20 shown, the slitting assembly 25 includes a slitting shaft rod 2501 rotatably installed between the second wallboards 24. The slitting shaft rod 2501 extends in the Y-axis direction. At least two slitting rollers 2502 are fixedly arranged at intervals on the slitting shaft rod 2501. There is a slitting gap 2503 between adjacent two slitting rollers 2502. The position of the slitting knife 26 corresponds to the position of the slitting gap 2503.

[0085] In this embodiment, the slitting knife 26 can be driven by existing linear driving devices such as electric slide rails, lead screw nut mechanisms, and oil cylinders to perform a linear motion in the Y-axis direction, and at the same time, the slitting knife 26 can also be driven by an existing linear driving device to perform a lifting motion in the Z-axis direction.

[0086] As Figures 15 - 17 and Figure 20 collectively shown, the folding device includes two position adjustment seats 27 that are arranged at intervals left and right in the Y-axis direction. The position adjustment seats 27 are slidably mounted between the two second wall panels 24 in the Y-axis direction, and each position adjustment seat 27 is adjusted in position through a position adjustment assembly 28.

[0087] As Figure 20 shown, the position adjustment assembly 28 includes a third adjustment screw 2801 that is rotatably mounted on the second wall panel 24 in the Y-axis direction. One end of the third adjustment screw 2801 extending outside the second wall panel 24 is fixed with an adjustment knob 2802, and the other end of the third adjustment screw 2801 is provided with a threaded section 2803. The position adjustment seats 27 are all mounted on the corresponding threaded section 2803 in a threaded connection manner. The staff can adjust the position of the position adjustment seat 27 by rotating the third adjustment screw 2801 according to the specification size of the paper material used and the predetermined slitting position.

[0088] As Figure 20 shown, a folding assembly 29 is jointly provided between the position adjustment seat 27 and the slitting roller 2502.

[0089] Among them, the folding assembly 29 includes a paper guiding inclined plate 2901 that is obliquely downwardly inclined in the X-axis direction. The paper guiding inclined plate 2901 is fixedly connected to the position adjustment seat 27 through a connecting arm 2902. There is a paper passing gap (not shown in the figure) between the upper end of the paper guiding inclined plate 2901 and the peripheral wall of the slitting roller 2502. The lower end of the paper guiding inclined plate 2901 is fixed with a paper stacking bottom plate 2903 that extends in the X-axis direction. At least two paper stacking upper plates 2904 are arranged above the paper stacking bottom plate 2903, and all the paper stacking upper plates 2904 are connected to the position adjustment seat 27 through a connecting frame 2905.

[0090] In this embodiment, there are folding gaps between the top of the paper stacking bottom plate 2903 and the paper stacking upper plates 2904, and between different paper stacking upper plates 2904.

[0091] In this embodiment, the shapes of the paper guiding inclined plate 2901, the paper stacking bottom plate 2903, and the paper stacking upper plates 2904, and the sizes of the gaps can all be replaced and adjusted as needed.

[0092] As Figures 15 - 17As commonly shown, a second transmission shaft 207 is rotatably installed in the first frame 2. The first transmission shaft 203 drives the second transmission shaft 207 to rotate through a seventh belt transmission assembly 208, and the second transmission shaft 207 drives a slitting shaft rod 2501 to rotate through an eighth belt transmission assembly 209.

[0093] As Figure 15 shown, a pressing assembly 30 is provided at the top of the rear end of the first frame 2.

[0094] Among them, the pressing assembly 30 includes two pressing front rollers 3001 extending along the Y-axis direction. The two pressing front rollers 3001 are coaxially arranged, and their positions correspond to the paper outlet position of the folding assembly 29. A pressing rear roller 3002 extending along the Y-axis direction is provided at the rear side of the pressing front roller 3001. The paper material bypasses the pressing front roller 3001 and the pressing rear roller 3002 in an S shape to press the folded paper material along the crease.

[0095] In this embodiment, both the pressing front roller 3001 and the pressing rear roller 3002 are rotatably installed on the first frame 2.

[0096] In this embodiment, the structures and transmission principles of each belt rotating assembly and gear transmission assembly belong to the prior art and are well known to those of ordinary skill in the art, so they will not be elaborated here.

[0097] The process of using the present invention to complete the full-automatic post-processing of napkins is as follows: S1. Control the piston rod of the loading oil cylinder 1703 to extend outwards, push the loading arm 1701 to rotate forward and finally to the material discharging position. The operator can place the round paper roll 101 placed on the transfer cart (not shown in the figure) between the two loading arms 1701, so that the two ends of the support shaft 102 are placed in the corresponding shaft placing grooves 1704. S2. Control the piston rod of the loading oil cylinder 1703 to retract inwards, drive the loading arm 1701 to rotate upwards and finally make the shaft placing groove 1704 connect with the opening of the limiting block 103, then the round paper roll 101 can be pushed onto the loading rack 1, and the two ends of the support shaft 102 are respectively pressed on the circumferential walls of the corresponding support rollers 104, realizing the loading of the round paper roll 101. S3. The free end of the paper material first extends forward, first bypasses the driven roller 1803 for turning, makes the paper material extend backward and bypasses the driving roller 1802 for turning, makes the paper material extend upwards, and enters the printing gap between the printing upper roller 20 and the printing lower roller 21 in a suitable direction, completing the automatic printing work of the paper material. S4. The paper material after completing the printing work passes through the gap between the slitting knife 26 and the slitting roller 2502, and winds around the slitting roller 2502. The paper material is slit into two along the X-axis direction by the slitting knife 26. S5. Two paper materials respectively pass through two paper passing gaps and enter below the paper stacking bottom plate 2903, and are attached to the bottom surface of the paper stacking bottom plate 2903. Then, they pass through the corresponding folding gaps according to a predetermined shape, and the side edges of the paper stacking bottom plate 2903 and the paper stacking upper plate 2904 are used to complete the folding work of the paper materials; S6. The folded paper materials pass through the pre-pressing front roller 3001 and the pre-pressing rear roller 3002, and the paper materials are pressed along the creases. Then, they sequentially bypass the paper feeding suction roller 4, the lower cutting roller 5, and the paper discharging suction roller 6 in an S shape, and pass through the cutting gap between the upper cutting roller 7 and the lower cutting roller 5; S7. During the telescopic movement of the piston rod of the lifting knife oil cylinder 801, the upper cutting roller 7 continuously rotates reciprocally under the power transmission of the lifting knife arm 802, so that the upper cutting knife 701 continuously repeats the actions of lifting and falling at intervals. When the lower cutting knife 501 of the lower cutting roller 5 leaves the cutting position, the upper cutting knife 701 is lifted. When the lower cutting knife 501 of the lower cutting roller 5 rotates to the cutting position, the upper cutting knife 701 falls. The lower cutting roller 5 continues to rotate to ensure that the lower cutting knife 501 and the upper cutting knife 701 perform point-to-point knife alignment cutting, and the paper materials passing through the cutting gap are cut at equal intervals, and the paper materials are cut into square napkins; S8. The cut napkins are adsorbed on the paper discharging suction roller 6 and rotate with it to the folding position below. At the same time, the paper discharging suction roller 6 drives the fork 901 to swing up and down with it through power transmission. During the upward swing of the fork 901, one end of the napkin will be lifted and folded along the X-axis direction. Then, under the blocking of the paper blocking assembly 10, the folded napkins are peeled off and fall onto the receiving claw 1202 below; S9. The counter 1104 calculates the falling quantity of the napkins through the number of rotation circles of the paper discharging suction roller 6. When the count of the counter 1104 reaches the preset value, the second driving motor 1203 drives the receiving claw 1202 to fall through power transmission. At the same time, the fourth driving motor 1306 drives the receiving claw 1303 to move backward along the X-axis direction to the receiving position through power transmission to temporarily receive the falling napkins; S10. The receiving claw 1202 finally falls to the discharging height and is inserted between the conveyor belts 1402. The conveyor belts 1402 are used to convey the two stacks of napkins on the receiving claw 1202 backward and away. The receiving claw 1202 that completes the discharging action is driven by the second driving motor 1203 to rise again, and at the same time, the third driving motor 1304 drives the receiving claw 1303 to fall through power transmission; S11. After the receiving claw 1303 and the material receiving claw 1202 pass through each other in an interleaved manner, the napkin on the receiving claw 1303 is transferred to the material receiving claw 1202. Then, the material receiving claw 1202 continues to rise until it reaches the material receiving height. Driven by the third driving motor 1304 and the fourth driving motor 1306, the receiving claw 1303 returns to the waiting position to wait for the next action. S12. The conveyor belt 1402 conveys the napkin backward to the pushing position. Driven by the Z-direction oil cylinder 1602 and the X-direction oil cylinder 1603, the pushing plate 1604 descends to the pushing height and pushes the napkin from the conveyor belt 1402 to the two-way discharging conveyor 15. Then, the pushing plate 1604 returns to the initial position to wait for the next action. S13. The two-way discharging conveyor 15 conveys two stacks of napkins in opposite directions to the corresponding packaging equipment for automatic packaging.

[0098] Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic production equipment for internally folded napkins, comprising a loading rack (1), a first rack (2) and a second rack (3) arranged in sequence along the X-axis direction, and the paper material passes through the loading rack (1), the first rack (2) and the second rack (3) in sequence along the X-axis direction, characterized in that, A feeding device is installed on the feeding rack (1), and a printing device, a slitting device, and a folding device are installed on the first rack (2) in sequence along the X-axis direction. A cutting device, a stacking device, and a discharging device are installed on the second rack (3). The cutting device includes a paper feeding suction roller (4), a lower cutting roller (5), and a paper discharging suction roller (6) arranged in sequence along the paper feeding direction. The paper feeding suction roller (4), the lower cutting roller (5), and the paper discharging suction roller (6) are all rotatably installed on the second rack (3). The paper material bypasses the paper feeding suction roller (4), the lower cutting roller (5), and the paper discharging suction roller (6) in an S-shaped route. An obliquely arranged upper cutting roller (7) is arranged above the lower cutting roller (5). The upper cutting roller (7) and the lower cutting roller (5) cooperate to perform knife alignment cutting on the paper material. One end of the upper cutting roller (7) is rotatably installed on the second rack (3) and is connected with a knife lifting assembly (8). The stacking device includes a folding assembly (9) and a paper blocking assembly (10) arranged below the paper discharging suction roller (6). The folding assembly folds the napkins in the X-axis direction and is driven by a reciprocating driving assembly (11) to perform reciprocating motion. The paper blocking assembly (10) is arranged on the discharging side of the paper discharging suction roller (6). The discharging device includes a material receiving assembly (12) and a middle supporting assembly (13) arranged below the folding assembly (9). A feeding assembly (14) is connected at the discharging position of the material receiving assembly (12). A two-way discharging conveyor (15) is connected at the conveying end of the feeding assembly (14).

2. The fully automatic production equipment for an internally folded napkin according to claim 1, wherein, The folding assembly (9) includes a plurality of fork tines (901) arranged at intervals in the Y-axis direction. One ends of all the fork tines (901) away from the paper discharging suction roller (6) are commonly fixed on a folding shaft rod (902). The folding shaft rod (902) extends in the Y-axis direction and is rotatably installed in the second rack (3). A plurality of annular slots (601) are arranged at intervals along the axial direction on the peripheral wall of the paper discharging suction roller (6). The slots (601) are arranged in one-to-one correspondence with the fork tines (901). The other ends of the fork tines (901) are inserted into the corresponding slots (601).

3. The fully automatic production equipment for an internally folded napkin according to claim 2, characterized in that, The reciprocating driving assembly (11) includes a first crank arm (1101) and a first rocker arm (1102) hinged together. The paper discharging suction roller (6) drives the first crank arm (1101) to rotate through a second gear transmission assembly (1103). One end of the first rocker arm (1102) away from the first crank arm (1101) is fixedly connected with the folding shaft rod (902).

4. The full-automatic production equipment for internally-folded napkins according to claim 3, characterized in that, A counter (1104) for counting the number of napkins falling is installed on the second rack (3). The paper discharging suction roller (6) is in transmission connection with the input shaft of the counter (1104) through a second belt transmission assembly (1105).

5. The fully automatic production equipment for an internally stacked tissue paper according to claim 2, characterized in that, The paper stop assembly (10) comprises a plurality of paper stop rods (1001) arranged in sequence at intervals along the Y-axis direction. The paper stop rods (1001) and the shift forks (901) are arranged in a staggered manner. Each paper stop rod (1001) is arranged between two adjacent slots (601). One end of the paper stop rod (1001) away from the paper discharge suction roller (6) is fixed to a paper stop crossbeam (1002). The paper stop crossbeam (1002) extends along the Y-axis direction and has its two ends fixed to the second frame (3).

6. The full-automatic production equipment for an internally folded napkin according to claim 1, characterized in that, The material receiving assembly (12) comprises a material receiving beam (1201) slidably mounted on the inner side of the second frame (3) along the Z-axis direction, the material receiving beam (1201) being driven by a first lifting drive mechanism to move in the Z-axis direction, a plurality of material receiving claws (1202) arranged in sequence and spaced apart along the Y-axis direction being fixed to the rear side wall of the material receiving beam (1201), the material receiving claws (1202) being arranged directly below the folding assembly (9).

7. An automatic production equipment for internally folded napkins according to claim 6, characterized in that, The center support assembly (13) comprises a lifting frame (1301) slidably mounted on the inner side of the second frame (3) along the Z-axis direction, the lifting frame (1301) is driven by the second lifting drive mechanism to move in the Z-axis direction, a translation beam (1302) is slidably mounted on the lifting frame (1301) along the X-axis direction, a plurality of receiving claws (1303) arranged in sequence and spaced apart along the Y-axis direction are fixed to the rear side wall of the translation beam (1302), the receiving claws (1303) are arranged in front of the material receiving claws (1202), and all the receiving claws (1303) and the material receiving claws (1202) are arranged in a staggered manner.

8. An automatic production equipment for an internally folded napkin according to claim 7, characterized in that, A fourth drive motor (1306) is fixedly mounted on the front end of the lifting frame (1301); a second crank arm (1307) and a second rocker arm (1308) are provided between the fourth drive motor (1306) and the translation beam (1302); one end of the second crank arm (1307) is fixedly connected to the motor shaft of the fourth drive motor (1306); the other end of the second crank arm (1307) is hingedly mounted to one end of the second rocker arm (1308); and the other end of the second rocker arm (1308) is hingedly mounted on the translation beam (1302).

9. An automatic production equipment for internally folded napkins according to claim 1, characterized in that, The lower cutting roller (5) is arranged to extend along the Y-axis direction, and a plurality of lower cutting knives (501) are fixed on the peripheral wall of the lower cutting roller (5) at equal intervals along the axial direction. An upper cutting knife (701) is fixed at a lower position on the peripheral wall of the upper cutting roller (7), and the upper cutting knife (701) is arranged to extend along the axial direction of the upper cutting roller (7). The blade of the upper cutting knife (701) is a spirally twisted plate-shaped blade, and the blade shape of the upper cutting knife (701) is adapted to the cutting path of the lower cutting knife (501).

10. The full-automatic production equipment for an internally-folded napkin according to claim 1, characterized in that The lifting knife assembly (8) includes a lifting knife oil cylinder (801) arranged outside the second frame (3). The cylinder block of the lifting knife oil cylinder (801) is hinged and installed on the outer wall of the second frame (3). A lifting knife arm (802) is arranged between the piston rod of the lifting knife oil cylinder (801) and the shaft rod of the upper cutting roller (7). One end of the lifting knife arm (802) is fixedly installed on the shaft rod of the upper cutting roller (7), and the other end of the lifting knife arm (802) is hinged to the piston rod of the lifting knife oil cylinder (801).

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