Cutting device for diaper production

Abstract

The present invention relates to the technical field of diaper production equipment, and specifically to a cutting device for diaper production, characterized in that it includes a mounting frame and an upper knife roller assembly and a lower knife roller assembly arranged in the mounting frame, the lower knife roller assembly includes a lower rotating shaft, a sleeve, a lower roller body, a knife holder mechanism and a transfer adsorption shell, the lower roller body is rotatably sleeved outside the sleeve, the sleeve is arranged on the mounting frame, the lower rotating shaft is rotatably sleeved in the sleeve and one end thereof passes through the sleeve and is connected to the lower roller body, a plurality of knife holder mechanisms and a plurality of transfer adsorption shells are alternately arranged on the outer circumference of the lower roller body in sequence, and the knife holder mechanism is used to cooperate with the cutting function and to stretch the area to be cut on the diaper before cutting. The present invention facilitates further fully stretching the area to be cut on the diaper before cutting, and after cutting, it will not cause many scratches to appear at the cutting part of the diaper, effectively ensures the cutting accuracy, and better guarantees the product quality and the continuity of production.

Description

Technical Field

[0001] The present invention relates to the technical field of diaper production equipment, and in particular to a cutting device used in diaper production. Background Art

[0002] Diapers are common sanitary products in people's daily lives. They are a general term for diapers, diapers, and pull-up pants. Existing diapers are all produced on assembly lines. Existing diapers need to be cut by cutting equipment during the processing to obtain diapers of appropriate sizes. However, due to the elastic characteristics of diapers, wrinkles will be generated due to elastic shrinkage. However, traditional cutting equipment is not convenient for further partially expanding the area to be cut of the diaper when cutting. If the diaper is cut when the wrinkles are not fully expanded, more scratches will appear on the cutting part of the diaper, which will have a certain impact on the cutting accuracy and affect the overall product quality of the diaper. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a cutting device for diaper production that is convenient for further fully stretching the area to be cut on the diaper before cutting, and after cutting, will not cause many scratches on the cutting part of the diaper, effectively ensuring the cutting accuracy, and better ensuring the product quality and production continuity.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a cutting device for diaper production, comprising an installation frame and an upper knife roller assembly and a lower knife roller assembly which are arranged in the installation frame and are arranged up and down in sequence and can rotate, the upper knife roller assembly and the lower knife roller assembly have opposite rotation directions, the lower knife roller assembly comprises a lower rotating shaft, a sleeve, a lower roller body, a plurality of opening knife seat mechanisms and a plurality of transfer adsorption shells, the lower roller body is rotatably sleeved outside the sleeve, the sleeve is fixedly arranged on the installation frame, the lower rotating shaft is rotatably sleeved in the sleeve and one end thereof passes through the sleeve and is fixedly connected to the lower roller body, the number of the plurality of opening knife seat mechanisms and the plurality of transfer adsorption shells are consistent and are alternately arranged on the outer circumferential surface of the lower roller body in sequence and are combined to form a circular negative pressure adsorption cutting wheel, the opening knife seat mechanism is used to cooperate in cutting and to open the area to be cut on the diaper before cutting.

[0005] Furthermore, the opening knife seat mechanism includes two opening adsorption shells, a lower knife seat and an opening drive assembly. The two opening adsorption shells are arranged in sequence along the circumferential direction of the lower roller body, and the lower knife seat is arranged between the two opening adsorption shells. The opening drive assembly is used to drive the two opening adsorption shells to move synchronously in the opposite direction. An opening gap is provided between the opening knife seat mechanism and the transfer adsorption shell to allow the opening adsorption shell to move.

[0006] Furthermore, the expansion drive assembly includes a fixed plate, a linear guide slider, a sliding plate and an expansion drive component. The fixed plate is fixedly arranged on the outer peripheral surface of the lower roller body, the sliding plate is L-shaped, there are two sliding plates, and they are respectively slidably connected to the upper end surface of the fixed plate through corresponding linear guide sliders. The two expansion adsorption shells are respectively fixedly installed on the two sliding plates, and the expansion drive component is used to drive the two sliding plates to move synchronously in the opposite direction.

[0007] The transmission gear of the present invention is a gear selected from the group consisting of a gearbox, a gear train, a gearbox, a gearbox, a gearbox for conveying information, a gear train for conveying data, and a gearbox for conveying information.

[0008] Furthermore, after being unfolded, the annular guide groove comprises two horizontal sections and two inclined sections which are alternately arranged in sequence, the two horizontal sections are arranged in parallel and spaced apart, and the two inclined sections are used to connect the head and tail ends of the two horizontal sections.

[0009] Furthermore, the lower knife seat includes a lower seat body and a lower knife strip. The lower seat body is in an N shape and is fixedly installed on the fixed plate. The cutting surface of the lower seat body is an arc surface and is provided with a strip mounting groove adapted to the lower knife strip. The lower knife strip is fixedly installed in the strip mounting groove.

[0010] Furthermore, a transfer adsorption chamber is provided in the transfer adsorption shell, the transfer adsorption surface of the transfer adsorption shell is an arc surface and is evenly distributed with a plurality of transfer adsorption holes, a first air duct communicating with the transfer adsorption chamber is fixedly provided on the outer surface of one side of the transfer adsorption shell, an open adsorption chamber is provided in the open adsorption shell, the open adsorption surface of the open adsorption shell is an arc surface and is evenly distributed with a plurality of open adsorption holes, and a second air duct communicating with the open adsorption chamber is fixedly provided on the outer surface of one side of the open adsorption shell.

[0011] Furthermore, it also includes a negative pressure mechanism, which includes a negative pressure plate, a negative pressure cover, a negative pressure main pipe, a first negative pressure branch pipe and a second negative pressure branch pipe. The negative pressure cover is in a circular ring shape and is fixedly mounted on one end of the lower roller body and is coaxially arranged with the lower roller body. The negative pressure plate is fixedly mounted on the mounting frame and is located in the negative pressure cover. The negative pressure plate and the negative pressure cover are gap-matched and annular sealing strips are provided on both sides between the two. An annular negative pressure cavity is provided on the outer circumferential surface of the negative pressure plate. A negative pressure main pipe communicating with the annular negative pressure cavity is fixedly mounted on one side surface of the negative pressure plate. A plurality of first negative pressure branch pipes and a plurality of second negative pressure branch pipes communicating with the annular negative pressure cavity are fixedly mounted on the outer circumferential surface of the negative pressure cover. The first negative pressure branch pipe is connected to the first air duct through a first flexible pipe, and the second negative pressure branch pipe is connected to the second air duct through a second flexible pipe.

[0012] Furthermore, arc-shaped masks matching the negative pressure adsorption cutting wheel are provided on both sides of the lower part thereof, and the gap between the two is matched, and the arc-shaped masks are fixedly installed in the installation frame.

[0013] Furthermore, the upper knife roller assembly includes an upper rotating shaft, an upper roller body and an upper cutter. Both ends of the upper rotating shaft are rotatably mounted on the mounting frame through upper seat bearings. The upper roller body is fixedly sleeved on the outer side of the upper rotating shaft. There are multiple upper cutters that are fixedly mounted on the upper roller body and evenly arranged along its circumferential direction. The number of upper cutters is consistent with the number of the open knife seat mechanisms and corresponds one to one.

[0014] As can be seen from the above description, the cutting device for diaper production provided by the present invention has the following beneficial effects: by setting up the stretching knife seat mechanism, it is convenient to further fully stretch out the area to be cut on the diaper before cutting, and make the area to be cut on the diaper free of wrinkles, so that after cutting, it will not cause many scratches at the cutting part of the diaper, effectively ensuring the cutting accuracy and better ensuring the product quality, and at the same time, with the setting of the transfer adsorption shell, it is convenient to adsorb and transfer the diapers to be cut and the diapers after cutting, effectively ensuring the continuity of production and ensuring the overall production efficiency; by setting up two stretching adsorption shells, negative pressure adsorption can be performed on both sides of the area to be cut on the diaper respectively, so that when the stretching drive assembly drives the two stretching adsorption shells to move away from each other and increase the distance between them, it will have a certain effect on the area to be cut on the diaper. The corresponding local stretching effect can further partially stretch the wrinkles in the area to be cut on the diaper, thereby ensuring the flatness of the area to be cut on the diaper and effectively ensuring the subsequent cutting accuracy; when the roller rolls in the annular guide groove with the rotation of the lower roller body, the relative position between the connecting shaft and the driving shaft can be changed, so that the swing arm can swing to drive the driving shaft to rotate, thereby driving the driving gear to rotate, and then, through the meshing transmission of the driving gear and the rack, the rack can be driven to move relative to the driving gear, thereby changing the distance between the two sliding plates, that is, changing the distance between the two stretched adsorption shells. When the distance between the two stretched adsorption shells is increased, the area to be cut on the diaper can be further partially stretched, effectively avoiding wrinkles; the upper cutting knife and the lower knife strip work in coordination to achieve smooth cutting of the diaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the internal structure of the cutting device used for diaper production according to the present invention.

[0016] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0017] Figure 3 for Figure 1 Schematic diagram of the cross section along the BB direction.

[0018] Figure 4 for Figure 3 A partial enlarged schematic diagram of point C in the middle.

[0019] Figure 5 It is a schematic diagram of the partial three-dimensional structure of the support tool holder mechanism.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the groove wheel.

[0021] Figure 7 It is a partial three-dimensional structural schematic diagram of the cutting device used for diaper production of the present invention.

[0022] Figure 8 Schematic diagram of the arrangement of the sliding plate, driving gear and rack.

[0023] In the figure: 1-installation frame; 2-upper knife roller assembly; 21-upper rotating shaft; 22-upper roller body; 23-upper cutter; 3-lower knife roller assembly; 31-lower rotating shaft; 32-shaft sleeve; 33-lower roller body; 331-driving chamber; 34-opening knife seat mechanism; 341-opening adsorption shell; 3411-opening adsorption chamber; 3412-opening adsorption hole; 3413-second air duct; 342-lower knife seat; 3421-lower seat body; 3422-lower knife strip; 343-opening driving assembly; 35-transfer adsorption shell; 351-transfer adsorption chamber; 352-transfer adsorption hole; 353-first air duct; 41-fixed plate ;42-linear guide slider;43-sliding plate;44-opening drive member;441-driving gear;442-rack;443-driving shaft;444-rocker;445-roller;446-groove wheel;447-connecting shaft;5-annular guide groove;51-horizontal section;52-inclined section;6-negative pressure mechanism;61-negative pressure plate;611-annular negative pressure chamber;62-negative pressure cover;63-negative pressure main pipe;64-first negative pressure branch pipe;65-second negative pressure branch pipe;66-first flexible pipe;67-second flexible pipe;68-annular sealing strip;7-arc-shaped cover;8-gear assembly;9-opening gap. DETAILED DESCRIPTION

[0024] The present invention is further described below through specific implementation modes.

[0025] like Figures 1 to 8 As shown, the cutting device for diaper production of the present invention comprises a mounting frame 1 and an upper knife roller assembly 2 and a lower knife roller assembly 3 which are arranged in the mounting frame 1 and are arranged up and down in sequence and can rotate. The upper knife roller assembly 2 rotates in the opposite direction to the lower knife roller assembly 3. The lower knife roller assembly 3 comprises a lower rotating shaft 31, a shaft sleeve 32, a lower roller body 33, a plurality of opening knife seat mechanisms 34 and a plurality of transfer adsorption shells 35. The lower roller body 33 is rotatably sleeved outside the shaft sleeve 32. The shaft sleeve 3 2 is fixedly arranged on the mounting frame 1, the lower rotating shaft 31 is rotatably sleeved in the shaft sleeve 32 and one end thereof passes through the shaft sleeve 32 and is fixedly connected to the lower roller body 33, the number of the plurality of the stretching knife seat mechanisms 34 and the plurality of the transfer adsorption shells 35 is consistent and they are alternately arranged on the outer peripheral surface of the lower roller body 33 and are combined to form a circular negative pressure adsorption cutting wheel, the stretching knife seat mechanism 34 is used to cooperate with the cutting effect and stretch the area to be cut on the diaper before cutting.

[0026] By setting the stretching knife holder mechanism 34, it is convenient to further fully stretch the area to be cut on the diaper before cutting, and make the area to be cut on the diaper free of wrinkles. In this way, after cutting, there will not be many scratches on the cutting part of the diaper, which effectively ensures the cutting accuracy and better guarantees the product quality. At the same time, with the setting of the transfer adsorption shell 35, it is convenient to adsorb and transfer the diapers to be cut and the diapers after cutting, which effectively ensures the continuity of production and the overall production efficiency.

[0027] In addition, one end of the lower rotating shaft 31 fixedly connected to the lower roller body 33 is also rotatably connected to the mounting frame 1 through a lower seat bearing, thereby making the installation of the lower rotating shaft more stable, and a first bearing is provided between the lower roller body 33 and the sleeve 32 to ensure the smoothness of the rotation of the lower roller body 33, and a second bearing is provided between the lower rotating shaft 31 and the sleeve 32 to ensure the smoothness of the rotation of the lower rotating shaft 31. Preferably, the mounting frame 1 includes a C-shaped frame plate and a sealing plate fixedly installed on one end of the opening of the C-shaped frame plate, thereby facilitating the overall installation of the cutting device.

[0028] Correspondingly, the opening knife seat mechanism 34 includes two opening adsorption shells 341, a lower knife seat 342 and an opening drive assembly 343. The two opening adsorption shells 341 are arranged in sequence along the circumferential direction of the lower roller body 33, and the lower knife seat 342 is arranged between the two opening adsorption shells 341. The opening drive assembly 343 is used to drive the two opening adsorption shells 341 to move synchronously in the opposite direction. An opening gap 9 is provided between the opening knife seat mechanism 34 and the transfer adsorption shell 35 to allow the opening adsorption shell 341 to move. Accordingly, the area to be cut on the diaper is aligned with the opening drive assembly 343. The position of the lower knife seat 342 corresponds to that of the lower knife seat 342, and no negative pressure adsorption is generated at this position. Therefore, by setting the two expanding adsorption shells 341, negative pressure adsorption can be performed on both sides of the area to be cut on the diaper. In this way, when the expanding drive assembly 343 drives the two expanding adsorption shells 341 away from each other and increases the distance between them, it will have a corresponding local stretching effect on the area to be cut on the diaper, so as to further partially expand the wrinkles in the area to be cut on the diaper, thereby ensuring the flatness of the area to be cut on the diaper and effectively ensuring the subsequent cutting accuracy.

[0029] The expansion drive assembly 343 includes a fixed plate 41, a linear guide slider 42, a sliding plate 43 and an expansion drive member 44. The fixed plate 41 is fixedly arranged on the outer peripheral surface of the lower roller body 33. The sliding plates 43 are two and are respectively slidably connected to the upper end surface of the fixed plate 41 through the corresponding linear guide sliders 42. The two expansion adsorption shells 341 are respectively fixedly installed on the two sliding plates 43. Correspondingly, the linear guide slider 42 includes a guide rail and a slider that slide with each other. Through the setting of the linear guide slider 42, the sliding plate 43 can be adjusted. 3 plays a corresponding guiding role and effectively ensures the stability and smoothness of the sliding plate 43 when sliding, thereby ensuring the stability and smoothness of the movement of the expanded adsorption shell 341. The expanded driving member 44 is used to drive the two sliding plates 43 to move synchronously in the opposite direction, thereby changing the distance between the two sliding plates 43, that is, changing the distance between the two expanded adsorption shells 341. When the distance between the two expanded adsorption shells 341 is increased, the area to be cut on the diaper can be further partially expanded, effectively avoiding wrinkles.

[0030] Preferably, the sliding plate 43 is in an L-shape, thereby ensuring the stable installation of the expanded adsorption shell 341 and the stable installation of the rack 442 at the same time.

[0031] Correspondingly, the expansion drive member 44 includes a driving gear 441, a rack 442, a driving shaft 443, a swing rod 444, a roller 445 and a groove wheel 446. The rack 442 is two and is fixedly installed at the lower ends of the two sliding plates 43 respectively. The fixed plate 41 is provided with a rotating cavity running through the upper and lower ends thereof. The driving shaft 443 is rotatably installed in the rotating cavity. Correspondingly, a third bearing is provided between the driving shaft 443 and the fixed plate 41 to ensure the smoothness of the driving shaft 443 when rotating. The upper end of the driving shaft 443 is fixedly installed with a The driving gear 441 is meshed with the two driving gears 441 for transmission. A driving cavity 331 is provided in the lower roller body 33. A connecting port corresponding to the rotating cavity is provided on the outer peripheral surface of the lower roller body 33. The lower end of the driving shaft 443 passes downward through the connecting port and extends into the driving cavity 331 and is fixedly connected to one end of the swing rod 444. A connecting shaft 447 is fixedly provided on the bottom surface of the other end of the swing rod 444. A rotatable roller 445 is installed on the connecting shaft 447. Correspondingly, a fourth bearing is provided between the roller 445 and the connecting shaft 447. To ensure the smoothness of the rotation of the roller 445, the groove wheel 446 is fixedly sleeved on the outside of the shaft sleeve 32 and is located in the driving cavity 331. The outer circumferential surface of the groove wheel 446 is provided with an annular guide groove 5. The roller 445 is embedded in the annular guide groove 5 and the two are in rolling cooperation. When the roller 445 rolls along the annular guide groove 5, it can drive the swing rod 444 to intermittently reciprocate and swing to drive the driving shaft 443 to intermittently reciprocate. By adopting this structure, when the roller 445 rolls in the annular guide groove 5 as the lower roller body 33 rotates, The relative position between the connecting shaft 447 and the driving shaft 443 can be changed, so that the swing rod 444 can swing to drive the driving shaft 443 to rotate, thereby driving the driving gear 441 to rotate, and then, through the meshing transmission of the driving gear 441 and the rack 442, the rack 442 can be driven to move relative to the driving gear 441, and finally the two sliding plates 43 can be driven to move. No additional power input is required, and it can be achieved by relying on the rotation of the lower roller body 33, and effectively ensure the accuracy of the corresponding expansion and cutting.

[0032] Correspondingly, the lower roller body 33 includes a roller seat and a roller cover. The roller seat is provided with the driving cavity 331 opened to one end. The roller cover is fixedly installed at the opening at one end of the roller seat. In addition, the roller seat is rotatably connected to the shaft sleeve 32. The roller cover is fixedly connected to the lower rotating shaft 31 through a tightening sleeve. Therefore, when the lower rotating shaft 31 rotates, the lower roller body 33 can be driven to rotate together, and the groove wheel 446 can be easily installed in the driving cavity 331.

[0033] Correspondingly, after the annular guide groove 5 is unfolded, it includes two horizontal sections 51 and two inclined sections 52 which are alternately arranged in sequence. The two horizontal sections 51 are arranged in parallel and spaced apart. The two inclined sections 52 are used to connect the head and tail ends of the two horizontal sections 51. As a result, when the roller 445 rolls from one of the horizontal sections 51 to the other horizontal section 51 through the inclined section 52, it is convenient to make the swing rod 444 swing, thereby driving the drive shaft 443 to rotate. Therefore, when the roller 445 rolls back and forth between the two horizontal sections 51 through the inclined section 52, the intermittent reciprocating rotation of the drive shaft 443 can be realized, and the roller 445 can rotate back and forth between the two horizontal sections 51. The two expanded adsorption shells 341 switch back and forth between an expanded state moving away from each other and a retracted state moving closer to each other, and when the roller 445 rolls in the horizontal section 51, the rocker arm 444 does not swing, that is, the drive shaft 443 does not rotate at this time. At this time, the two expanded adsorption shells 341 remain in an expanded state or a retracted state. Accordingly, the length of the horizontal section 51 and the length of the inclined section 52 can be set according to actual needs to adjust the expansion time or retraction time of the two expanded adsorption shells 341, and the spacing between the two horizontal sections 51 can also be set according to actual needs to adjust the rotation angle of the drive shaft 443.

[0034] The lower knife seat 342 includes a lower seat body 3421 and a lower knife strip 3422. The lower seat body 3421 is in an N shape and is fixedly installed on the fixed plate 41. The cutting surface of the lower seat body 3421 is an arc surface and is provided with a strip-shaped mounting groove adapted to the lower knife strip 3422. The lower knife strip 3422 is fixedly installed in the strip-shaped mounting groove.

[0035] Correspondingly, a transfer adsorption chamber 351 is provided in the transfer adsorption shell 35, and the transfer adsorption surface of the transfer adsorption shell 35 is an arc surface and is evenly distributed with a plurality of transfer adsorption holes 352, and the transfer adsorption holes 352 are communicated with the transfer adsorption chamber 351, thereby the diaper can be well adsorbed on the transfer adsorption surface, and a first air duct 353 is fixedly provided on the outer surface of one side of the transfer adsorption shell 35, which is communicated with the transfer adsorption chamber 351, so as to be connected with the negative pressure source and generate negative pressure in the transfer adsorption chamber 351, and an open adsorption chamber 3411 is provided in the open adsorption shell 341, and the open adsorption surface of the open adsorption shell 341 is an arc surface and is evenly distributed with A plurality of expansion adsorption holes 3412 are provided, and the expansion adsorption holes 3412 are communicated with the expansion adsorption cavity 3411, so that the diaper can be well adsorbed on the expansion adsorption surface. At the same time, the expansion adsorption surface of the expansion adsorption shell 341 is an arc surface. Relatively speaking, the expansion adsorption surface is in a shape of one side high and the other side low, and the side away from the lower knife seat 342 is low, which is also beneficial to further improve the adsorption stability of the diaper when it is expanded. A second air duct 3413 communicated with the expansion adsorption cavity 3411 is fixedly provided on the outer surface of one side of the expansion adsorption shell 341 so as to be connected with the negative pressure source and make the expansion adsorption cavity 3411 generate negative pressure.

[0036] The cutting device also includes a negative pressure mechanism 6, which includes a negative pressure plate 61, a negative pressure cover 62, a negative pressure main pipe 63, a first negative pressure branch pipe 64 and a second negative pressure branch pipe 65. The negative pressure cover 62 is annular and fixedly mounted on one end of the lower roller body 33 and is coaxially arranged with the lower roller body 33. The negative pressure plate 61 is fixedly mounted on the mounting frame 1 and is located in the negative pressure cover 62. The negative pressure plate 61 and the negative pressure cover 62 are gap-matched and annular sealing strips 68 are provided on both sides of the two, so that the sealing between the two is ensured. , and can effectively ensure the smoothness of relative rotation between the two. An annular negative pressure cavity 611 is provided on the outer circumferential surface of the negative pressure plate 61, and the negative pressure main pipe 63 communicating with the annular negative pressure cavity 611 is fixedly installed on one side surface of the negative pressure plate 61. A plurality of first negative pressure branch pipes 64 and a plurality of second negative pressure branch pipes 65 communicating with the annular negative pressure cavity 611 are fixedly installed on the outer circumferential surface of the negative pressure cover 62. The first negative pressure branch pipe 64 is connected to the first air duct 353 through the first flexible pipe 66, and the second negative pressure branch pipe 65 is connected to the first air duct 353 through the first flexible pipe 66. The second flexible tube 67 is connected with the second air duct 3413. By installing the negative pressure cover 62 on the lower roller body 33, it can rotate with the lower roller body 33, so that the first negative pressure branch pipe 64 and the first air duct 353 and the second negative pressure branch pipe 65 and the second air duct 3413 can be well maintained in a one-to-one correspondence, so as to facilitate the stable arrangement of the first flexible tube 66 and the second flexible tube 67. In addition, the negative pressure main pipe 63 is connected with the negative pressure source, so as to maintain the negative pressure provided to the annular negative pressure chamber 611. Pressure is generated through the connection between the first negative pressure branch pipe 64, the first flexible pipe 66 and the first air duct 353, and through the connection between the second negative pressure branch pipe 65, the second flexible pipe 67 and the second air duct 3413. Therefore, during the rotation of the lower roller body 33, negative pressure can be generated in the transfer adsorption shell 35 and the expanded adsorption shell 341, and the transfer adsorption hole 352 and the expanded adsorption hole 3412 are set to achieve stable adsorption of the diaper by the transfer adsorption shell 35 and the expanded adsorption shell 341.

[0037] In addition, arc-shaped shielding plates 7 that are compatible with the negative pressure adsorption cutting wheel are provided on both sides of the lower part of the negative pressure adsorption cutting wheel, and the gap between the two is matched. The arc-shaped shielding plates 7 are fixedly installed in the mounting frame 1. In this way, it is convenient to cover the two sides of the lower part of the negative pressure adsorption cutting wheel to facilitate the release of the diaper.

[0038] Correspondingly, the upper knife roller assembly 2 includes an upper rotating shaft 21, an upper roller body 22 and an upper cutter 23. Both ends of the upper rotating shaft 21 are rotatably mounted on the mounting frame 1 through upper seat bearings. The upper roller body 22 is fixedly sleeved on the outer side of the upper rotating shaft 21. The upper cutters 23 are multiple and fixedly mounted on the upper roller body 22 and evenly arranged along its circumferential direction. The number of the upper cutters 23 is consistent with the number of the opening knife seat mechanism 34 and corresponds one to one. The upper cutter 23 cooperates with the lower knife strip 3422 to achieve cutting of diapers.

[0039] Preferably, the number of the upper cutting knife 23, the opening knife seat mechanism 34, and the transfer adsorption shell 35 are 2-3.

[0040] The cutting device also includes a rotation driving mechanism, which includes a driving motor, a belt transmission assembly and a gear assembly 8. The motor shaft of the driving motor is transmission-connected to one end of the lower rotating shaft 31 through the belt transmission assembly, and one end of the lower rotating shaft 31 is transmission-connected to one end of the upper rotating shaft 21 through the gear assembly 8, thereby facilitating the upper knife roller assembly 2 and the lower knife roller assembly 3 to rotate synchronously in the opposite direction. Correspondingly, the belt transmission assembly includes a driving pulley, a transmission belt and a driven pulley. The driving pulley is fixedly mounted on the motor shaft of the driving motor, and the driven pulley is fixedly mounted on one end of the lower rotating shaft 31. The driving pulley is transmission-connected to the driven pulley through the transmission belt. The gear assembly 8 includes a driving gear and a driven gear. The driving gear is fixedly mounted on one end of the lower rotating shaft 31, and the driven gear is fixedly mounted on one end of the upper rotating shaft 21, and the driving gear is meshed with the driven gear for transmission.

[0041] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A cutting device for diaper production, comprising a mounting frame and an upper knife roller assembly and a lower knife roller assembly which are arranged in the mounting frame and are arranged in sequence up and down and can rotate, wherein the upper knife roller assembly rotates in opposite directions to the lower knife roller assembly, and is characterized in that: The lower knife roller assembly includes a lower rotating shaft, a shaft sleeve, a lower roller body, a plurality of stretching knife seat mechanisms and a plurality of transfer adsorption shells, the lower roller body is rotatably sleeved outside the shaft sleeve, the shaft sleeve is fixedly arranged on the mounting frame, the lower rotating shaft is rotatably sleeved in the shaft sleeve and one end thereof passes through the shaft sleeve and is fixedly connected to the lower roller body, the number of the plurality of stretching knife seat mechanisms and the plurality of transfer adsorption shells is consistent and they are alternately arranged on the outer circumferential surface of the lower roller body in sequence and combined to form a circular negative pressure adsorption cutting wheel, the stretching knife seat mechanism is used to cooperate in cutting and stretch the area to be cut on the diaper before cutting, the stretching knife seat mechanism includes Two expansion adsorption shells, a lower knife seat and an expansion drive assembly, the two expansion adsorption shells are arranged in sequence along the circumferential direction of the lower roller body, the lower knife seat is arranged between the two expansion adsorption shells, the expansion drive assembly is used to drive the two expansion adsorption shells to move synchronously in the opposite direction, and an expansion gap that allows the expansion adsorption shell to move is provided between the expansion knife seat mechanism and the transfer adsorption shell, the expansion drive assembly includes a fixed plate, a linear guide slider, a sliding plate and an expansion drive member, the fixed plate is fixedly arranged on the outer peripheral surface of the lower roller body, the sliding plate is L-shaped, and the sliding plate is two and is respectively connected by sliding through the corresponding linear guide sliders The two expanded adsorption shells are connected to the upper surface of the fixed plate, and are respectively fixedly installed on the two sliding plates. The expanded driving member is used to drive the two sliding plates to move synchronously in the opposite direction. The expanded driving member includes a driving gear, a rack, a driving shaft, a rocker, a roller and a groove wheel. The rack is two and is respectively fixedly installed on the lower ends of the two sliding plates. A rotating cavity running through the upper and lower ends of the fixed plate is provided in the fixed plate. The driving shaft is rotatably installed in the rotating cavity. The upper end of the driving shaft is fixedly installed with the driving gear located between the two racks. The driving gear is meshed with the two driving gears for transmission. A driving gear is provided in the lower roller body. The cam is fixedly mounted on the outside of the drive shaft and is in contact with the drive shaft to move in a reciprocating manner, the cam being arranged on a circle with the cam being in contact with the drive shaft.

2. The cutting device for diaper production according to claim 1, characterized in that: After being unfolded, the annular guide groove comprises two horizontal sections and two inclined sections which are alternately arranged in sequence. The two horizontal sections are arranged in parallel and at intervals, and the two inclined sections are used to connect the head and tail ends of the two horizontal sections.

3. The cutting device for diaper production according to claim 1, characterized in that: The lower knife seat includes a lower seat body and a lower knife strip. The lower seat body is in an N shape and is fixedly installed on the fixed plate. The cutting surface of the lower seat body is an arc surface and is provided with a strip-shaped mounting groove adapted to the lower knife strip. The lower knife strip is fixedly installed in the strip-shaped mounting groove.

4. The cutting device for diaper production according to claim 1, characterized in that: A transfer adsorption chamber is provided in the transfer adsorption shell, the transfer adsorption surface of the transfer adsorption shell is an arc surface and is evenly distributed with a plurality of transfer adsorption holes, a first air duct communicating with the transfer adsorption chamber is fixedly provided on one side outer surface of the transfer adsorption shell, an expansion adsorption chamber is provided in the expansion adsorption shell, the expansion adsorption surface of the expansion adsorption shell is an arc surface and is evenly distributed with a plurality of expansion adsorption holes, and a second air duct communicating with the expansion adsorption chamber is fixedly provided on one side outer surface of the expansion adsorption shell.

5. The cutting device for diaper production according to claim 4, characterized in that: It also includes a negative pressure mechanism, which includes a negative pressure plate, a negative pressure cover, a negative pressure main pipe, a first negative pressure branch pipe and a second negative pressure branch pipe, the negative pressure cover is in an annular shape and is fixedly mounted on one end of the lower roller body and is coaxially arranged with the lower roller body, the negative pressure plate is fixedly mounted on the mounting frame and is located in the negative pressure cover, the negative pressure plate and the negative pressure cover are gap-matched and annular sealing strips are provided on both sides between the two, an annular negative pressure cavity is provided on the outer circumferential surface of the negative pressure plate, the negative pressure main pipe communicating with the annular negative pressure cavity is fixedly mounted on one side surface of the negative pressure plate, and a plurality of the first negative pressure branch pipes and a plurality of the second negative pressure branch pipes communicating with the annular negative pressure cavity are fixedly mounted on the outer circumferential surface of the negative pressure cover, the first negative pressure branch pipe is connected to the first air duct through a first flexible pipe, and the second negative pressure branch pipe is connected to the second air duct through a second flexible pipe.

6. The cutting device for diaper production according to claim 1, characterized in that: Arc-shaped shielding sheets adapted to the negative pressure adsorption cutting wheel are arranged on both sides of the lower part of the negative pressure adsorption cutting wheel, and the gap between the two is matched, and the arc-shaped shielding sheets are fixedly installed in the installation frame.

7. The cutting device for diaper production according to claim 1, characterized in that: The upper knife roller assembly includes an upper rotating shaft, an upper roller body and an upper cutter. Both ends of the upper rotating shaft are rotatably mounted on the mounting frame through upper seat bearings. The upper roller body is fixedly sleeved on the outer side of the upper rotating shaft. There are multiple upper cutters that are fixedly mounted on the upper roller body and evenly arranged along its circumferential direction. The number of the upper cutters is consistent with the number of the open knife seat mechanisms and corresponds one to one.

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