CN107932584B

CN107932584B - Sheet cutter

Info

Publication number: CN107932584B
Application number: CN201711480178.0A
Authority: CN
Inventors: 郑晓东; 刘思培; 林洪亮
Original assignee: Jiangxi Haiyuan Composite Material Technology Co ltd
Current assignee: Jiangxi Haiyuan Composite Material Technology Co ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2023-07-25
Anticipated expiration: 2037-12-29
Also published as: CN107932584A

Abstract

The invention relates to a sheet cutting machine which comprises a frame, a winding mechanism, a feeding table, a longitudinal cutting knife mechanism, a main driving mechanism and a transverse cutting knife mechanism, wherein the feeding table, the longitudinal cutting knife mechanism, the main driving mechanism and the transverse cutting knife mechanism are fixed on the frame and are sequentially arranged from front to back; the longitudinal cutter mechanism comprises a cutter holder, a first pneumatic shearing cutter and a lower cutter roller, wherein two ends of the cutter holder are horizontally fixed on the frame, the first pneumatic shearing cutter is fixed on the cutter holder, the lower cutter roller is fixed below the cutter holder, a hob is arranged on the lower cutter roller corresponding to the first pneumatic shearing cutter, the first pneumatic shearing cutters are arranged in one-to-one correspondence with the hob, and when the material is cut, the first pneumatic shearing cutter is matched with the hob to complete longitudinal cutting, and the lower cutter roller is synchronously driven by the main driving mechanism; the sheet enters the longitudinal cutter mechanism after passing through the feeding table, and the longitudinal cutting is completed.

Description

Sheet cutter

Technical Field

The invention relates to a sheet cutter, and belongs to the field of sheet cutters.

Background

The invention relates to a sheet cutter which is equipment for carrying out double-sided film tearing and accurately cutting off a sheet material aiming at a similar double-sided film SMC sheet material. The prior art discloses a sheet cutting machine, such as an SMC sheet automatic film tearing cutting machine with a publication number of CN102773873A, which comprises a film tearing and feeding device, a cutting device and a sheet taking device, wherein the film tearing and feeding device comprises an upper film tearing roller, a lower film tearing roller, a main sheet feeding roller and a slave sheet feeding roller which are arranged in a film tearing and feeding frame, the upper film tearing roller and the lower film tearing roller are matched with an upper film and a lower film, the main sheet feeding roller and the slave sheet feeding roller are matched with a middle core material, and each roller is driven by a servo motor through a transmission mechanism; the cutting device comprises a cutting bracket, wherein a screw rod, a slide rod and a slide block are arranged in the cutting bracket, the screw rod is driven by a second servo motor, the lower part of the slide block is connected with a blade, and the blade is driven by a third motor to rotate; the sheet taking device comprises a sheet taking frame, at least more than two sheet taking rollers are arranged in the sheet taking frame, the sheet taking rollers are matched with the cut core material, the sheet taking rollers are driven by a motor through a transmission chain, a sheet taking plate is arranged below the sheet taking rollers, and the sheet taking plate is driven by a sheet taking sliding mechanism to take out the cut formed core material. The technical scheme has the following problems: 1. the cutting device can only cut transversely, and the process is single; 2. when the sheet is cut, the angle and stability of the tearing film are disturbed; 3. the film winding shafts are fixed in a cantilever shaft mode, namely one end of each film winding shaft is installed on the frame, the other end of each film winding shaft is supported through a swinging hook, and the upper swinging hook and the lower swinging hook respectively use an air cylinder and combine with mechanical limiting to realize unhooking and shaft end supporting functions. When the film winding shaft works normally, the air cylinder is required to always support the film winding shaft by air pressure, and due to the pulsation of an air source, when the air cylinder is slightly out of air, the film winding shaft in high-speed operation is caused to shake, even automatic unhooking is caused, the swing hook cannot support the shaft end, and potential safety hazards exist.

Disclosure of Invention

In order to solve the technical problems, the invention provides a sheet cutter which not only can transversely cut but also can longitudinally cut, can improve the film tearing angle, eliminates unsmooth feeding of a belt material caused by sticking of a plastic film, and can realize the function of supporting a shaft end without cylinder force when a film rolling device works.

The technical scheme of the invention is as follows:

the sheet cutting machine comprises a frame, a winding mechanism, a feeding table, a longitudinal cutter mechanism, a main driving mechanism and a transverse cutter mechanism, wherein the feeding table, the longitudinal cutter mechanism, the main driving mechanism and the transverse cutter mechanism are fixed on the frame and are sequentially arranged from front to back;

the longitudinal cutter mechanism comprises a cutter holder, a first pneumatic shearing cutter and a lower cutter roller, wherein two ends of the cutter holder are horizontally fixed on the frame, the first pneumatic shearing cutter is fixed on the cutter holder, the lower cutter roller is fixed below the cutter holder, a hob is arranged on the lower cutter roller corresponding to the first pneumatic shearing cutter, the first pneumatic shearing cutters are arranged in one-to-one correspondence with the hob, and when the material is cut, the first pneumatic shearing cutter is matched with the hob to complete longitudinal cutting, and the lower cutter roller is synchronously driven by the main driving mechanism; the sheet enters a longitudinal cutter mechanism after passing through a feeding table to finish longitudinal cutting;

the main driving mechanism provides sheet advancing power and synchronously drives the lower cutter roller; after the longitudinally cut sheet material passes through the main driving mechanism, when the sheet material needs to be transversely cut, the transverse cutting mechanism completes the transverse cutting of the sheet material;

and the film on the sheet is adhered to the sheet and sequentially passes through the feeding table, the slitting knife mechanism and the main driving mechanism, and then the film is torn and wound through the winding mechanism, so that the film and the sheet are separated.

More preferably, the slicing machine further comprises a material pressing mechanism, wherein the material pressing mechanism is arranged between the main driving mechanism and the transverse cutter mechanism, the material pressing mechanism comprises a lower roller and an upper pressing roller, the upper pressing roller is provided with pressing force by a first air cylinder, and the first air cylinder is arranged above the upper pressing roller; when the main driving mechanism feeds, the upper pressing roller is in a loosening state to ensure smooth feeding, the upper pressing roller presses the sheet during cutting, the transverse cutting knife mechanism transversely cuts off the sheet, a film on the sheet is attached to the sheet and sequentially passes through the feeding table, the longitudinal cutting knife mechanism, the main driving mechanism and the pressing mechanism, and the film is torn and wound through the winding mechanism, so that separation of the film and the sheet is realized.

More preferably, the main driving mechanism comprises a driving roller and a driven pressing roller which are arranged in parallel up and down, the driven pressing roller provides pressing force through a second air cylinder, and the second air cylinder is arranged above the driven pressing roller; the driving roller is driven by a servo motor to provide sheet advancing power, and synchronously drives the lower cutter roller.

More preferably, the transverse cutter mechanism comprises a motor, a synchronous belt sliding table, a sliding seat, a second pneumatic shearing blade and a long cutter bar, wherein the synchronous belt sliding table is horizontally arranged, two ends of the synchronous belt sliding table are fixed on the frame, the synchronous belt sliding table is powered by the motor, the sliding seat is connected with the synchronous belt sliding table, the second pneumatic shearing blade is fixed on the sliding seat, and the second pneumatic shearing blade is driven to transversely slide through the synchronous belt sliding table; the long cutter bar is arranged below the synchronous belt sliding table and matched with the second pneumatic shearing knife to finish transverse cutting; the long knife bar is fixed on the frame through a knife locking frame, and the knife locking frame is horizontally arranged and two ends of the long knife bar are fixed on the frame.

More preferably, the transverse cutting knife mechanism further comprises a bearing plate, two ends of the bearing plate are fixed on the frame, a through hole for matching the second pneumatic shearing knife to transversely slide is transversely formed in the bearing plate, the locking knife rest is arranged below the bearing plate, and the long knife bar is arranged below the through hole.

More preferably, the film winding mechanism comprises two film winding shafts, a third cylinder, a rocker, a parallel four-bar mechanism and a limiting device, wherein a paper tube is sleeved on the film winding shafts, one end of the third cylinder is installed on one side surface of the frame, the other end of the third cylinder is movably connected with one end of the rocker and the parallel four-bar mechanism, the other end of the rocker is movably connected with the frame, the parallel four-bar mechanism is installed on the frame and on the same side as the third cylinder, one end of the two film winding shafts is fixed on the other side surface of the frame, the other end of the two film winding shafts is supported by the parallel four-bar mechanism, the rocker and the parallel four-bar mechanism are driven to rotate when the third cylinder contracts, and the limiting device is adjacently arranged beside the rocker and controls the stop position of the rocker, so that the film winding mechanism can utilize the dead center characteristic of the parallel four-bar mechanism to support the film winding shafts.

More preferably, the parallel four-bar mechanism comprises two swinging hooks which are arranged in parallel up and down, a connecting rod and a supporting rod, wherein the two swinging hooks are both in rotary connection with the frame, the other end of the film winding shaft is supported by the hook head of the swinging hook, the upper end and the lower end of the connecting rod are respectively and movably connected with the tail end of the swinging hook, the lower end of the connecting rod is also movably connected with one end of the supporting rod, and the other end of the supporting rod is movably connected with the third cylinder and one end of the rocking rod; when the two film winding shafts are in a working state, the parallel four-bar mechanism supports the two film winding shafts, and the connecting bars and the supporting rods are positioned on the same straight line and perpendicular to the ground.

More preferably, the film winding mechanism further comprises a first motor, a coupler, a connecting disc and a torque retainer which are sequentially and fixedly connected, wherein the first motor is used for driving the film winding shaft, and the shaft end of the film winding shaft is connected with the torque retainer; the film winding shaft is fixed on the frame through a bearing and a bearing seat, two nuts are arranged at the shaft end of the film winding shaft, a stop washer is arranged between the two nuts, the film winding shaft and the bearing are positioned through the two nuts, and the shaft end of the film winding shaft is prevented from being separated from the bearing due to vibration during working.

More preferably, the film winding mechanism further comprises two transition rollers, wherein two ends of each transition roller are fixed on the frame and are positioned behind the film winding shaft, so that the film is firstly wound on the film winding shaft after passing through the transition rollers, and the transition rollers are used for guiding the trend of the film.

More preferably, two limit baffles are arranged on the feeding table, a chute is horizontally and transversely arranged on the feeding table, the limit baffles are fixed on the chute, and the distance between the two limit baffles is adjusted by adjusting the fixed positions of the limit baffles on the chute, so that sheets with different widths are matched, and the sheet travelling process is prevented from deviating.

The invention has the following beneficial effects:

1. the longitudinal cutter mechanism is arranged, a plurality of first pneumatic shearing cutters can be arranged according to the process requirements, and the longitudinal cutting of the sheet is realized;

2. the invention is provided with the transverse cutter mechanism to realize transverse cutting of the sheet;

3. the invention is provided with the material pressing mechanism, improves the film tearing angle, and eliminates unsmooth feeding of the belt material caused by poor film tearing due to the sticking of the plastic film;

4. the film winding mechanism is arranged, a single cylinder is adopted to drive the parallel four-bar mechanism, the function of supporting the shaft end is achieved through the dead point characteristic when the parallel four-bar mechanism is collinear, and the supporting function is kept without using cylinder force; meanwhile, the torque retainer is connected with the film winding shaft, when the diameter of the film winding is increased, the film winding speed is higher than the feeding speed of the main driving mechanism, and the film automatically slides to ensure the feeding precision.

Drawings

FIG. 1 is a front view of the sheeter cutter of the present invention;

FIG. 2 is a side cross-sectional view of the die cutter of the present invention;

FIG. 3 is a rear view of the die cutter of the present invention;

FIG. 4 is a schematic view of a slitter mechanism of the die cutter of the present invention;

FIG. 5 is a schematic view of a cross cutter mechanism and a swage mechanism of the sheeter cutter of the present invention;

FIG. 6 is a schematic view of a cross cutter mechanism of the sheeter cutter of the present invention;

FIG. 7 is a schematic view of a film winding mechanism of the die-cutting machine of the present invention;

FIG. 8 is a schematic view of a limiting device of a film winding mechanism of the sheet cutter of the present invention;

FIG. 9 is a schematic diagram of the connection of the film winding shaft and the torque holder of the die cutter of the present invention;

FIG. 10 is a schematic view of the torque holder of the die cutter of the present invention;

FIG. 11 is a schematic view of the mechanism of the receiving plate of the slicing machine of the present invention.

The reference numerals in the drawings are as follows:

10. a frame; 20. a film rolling mechanism; 21. a film winding shaft; 211. a bearing; 212. a bearing seat; 213. a second nut; 214. a stop washer; 215. a paper tube; 216. a first motor; 22. a third cylinder; 23. a rocker; 24. a parallel four bar linkage; 241. a swinging hook; 242. a connecting rod; 243. a support rod; 25 limit devices, 251 and fixing seats; 252. a bolt; 253. a first nut; 26. a coupling; 27. a connecting disc; 28. a torque retainer; 29. a transition roller; 30. a feeding table; 31. a limit baffle; 32. a chute; 40. a slitting knife mechanism; 41. a holder; 42. a first pneumatic shear blade; 43. a hob; 44. a lower cutter drum; 50. a main driving mechanism; 51. a driving roller; 52. driven compaction roller; 53. a second cylinder; 54. a servo motor; 60. a transverse cutter mechanism; 61. a motor; 62. a synchronous belt sliding table; 63. a slide; 64. a second pneumatic shearing knife; 65. a long knife bar; 66. locking a tool rest; 67. a receiving plate; 671. a through hole; 70. a material pressing mechanism; 71. a lower drum; 72. an upper pressing roller; 73. a first cylinder.

Detailed Description

Referring to fig. 1 to 11, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Embodiment one:

referring to fig. 1 to 4, a sheet cutter includes a frame 10, a film winding mechanism 20, and a feeding table 30, a slitting cutter mechanism 40, a main driving mechanism 50, and a transverse cutter mechanism 60 which are fixed on the frame 10 and are sequentially arranged from front to back, wherein the film winding mechanism 20 is fixed on the front portion of the frame 10 and is arranged in parallel with the feeding table 30; referring to fig. 4, the slitter mechanism 40 includes a knife holder 41, a first pneumatic shear 42, and a lower cutter drum 44, wherein two ends of the knife holder 41 are horizontally fixed on the frame 10, the first pneumatic shear 42 is fixed on the knife holder 41, the lower cutter drum 44 is fixed below the knife holder 41, a hob 43 is disposed on the lower cutter drum 44 corresponding to the first pneumatic shear 42, the first pneumatic shear 42 is disposed in one-to-one correspondence with the hob 43, and during blanking, the first pneumatic shear 42 cooperates with the hob 43 to complete longitudinal cutting, and the lower cutter drum 44 is synchronously driven by the main driving mechanism 50; the sheet material passes through the feeding table 30 and then enters the longitudinal cutter mechanism 40 to finish longitudinal cutting; the main driving mechanism 50 provides sheet advancing power and synchronously drives the lower cutter drum 44; after passing through the main driving mechanism 50, the longitudinally cut sheet is transversely cut by the transverse cutter mechanism 60 when transverse cutting is required; after the film on the sheet is attached to the sheet and sequentially passes through the feeding table 30, the slitting cutter mechanism 40 and the main driving mechanism 50, the film is torn and wound by the film winding mechanism 20, so that the film and the sheet are separated.

Preferably, two limit baffles 31 are arranged on the feeding table 30, a chute 32 is horizontally and transversely arranged on the feeding table 30, the limit baffles 31 are fixed on the chute 32, and the distance between the two limit baffles 31 is adjusted by adjusting the fixed positions of the limit baffles 31 on the chute 32, so that sheets with different widths are matched, and the sheet travelling process is prevented from deviating.

The working principle of the embodiment is as follows:

referring to fig. 2 with emphasis, the horizontal arrow in fig. 2 indicates the path of the sheet, and the upward and downward arrows indicate the path after the film has been torn. The sheet enters the slitter mechanism 40 from the loading table 30, and the number of first pneumatic shears 42 on the slitter mechanism 40 is process dependent (the number of first pneumatic shears 42 is 4, the sheet can be cut into 5 rows, and two adjacent rows are removable material flashes). Since the working principle of pneumatic rolling determines that the lower cutter roller 44 of the slitter mechanism 40 needs to be synchronous with the main driving mechanism 50, a synchronous belt mechanism can be adopted for transmission, and the first pneumatic shearing knife 42 cooperates with the hob 43 in the lower cutter roller 44 for cutting materials. After the sheet is longitudinally cut, the sheet continuously advances forward under the drive of the main driving mechanism 50, passes through the transverse cutter mechanism 60, and is continuously torn and wound through the film winding mechanism 20, when the sheet needs to be transversely cut, the main driving mechanism 50 stops working, and the transverse cutter mechanism 60 transversely cuts. Thus, the die-cut is capable of achieving longitudinal cutting, transverse cutting, and film-tearing winding of the sheet material according to the process design.

Embodiment two:

the main difference between this embodiment and the first embodiment is that:

first, referring to fig. 5, the slicing machine further includes a pressing mechanism 70, the pressing mechanism 70 is disposed between the main driving mechanism 50 and the transverse cutter mechanism 60, the pressing mechanism 70 includes a lower roller 71 and an upper pressing roller 72, the upper pressing roller 72 is provided with a pressing force by a first cylinder 73, and the first cylinder 73 is disposed above the upper pressing roller 72; when the main driving mechanism 50 feeds, the upper pressing roller 72 is in a loose state to ensure smooth feeding, and when transverse cutting is needed, the upper pressing roller 72 presses the sheet, the transverse cutting mechanism 60 cuts the sheet transversely, and the film on the sheet is attached to the sheet and sequentially passes through the feeding table 30, the slitting mechanism 40, the main driving mechanism 50 and the pressing mechanism 70, and the film is torn and wound by the film winding mechanism 20, so that separation of the film and the sheet is realized. Another equivalent alternative to the lower 71 and upper 72 pinch rollers is to pinch the sheet with rectangular tubes, in particular: the material pressing mechanism comprises a lower rectangular pipe and an upper pressing rectangular pipe, and the rectangular pipe is provided with a transition round angle.

Referring to fig. 3 and 6, the transverse cutter mechanism 60 includes a motor 61, a synchronous belt sliding table 62, a sliding seat 63, a second pneumatic shearing tool 64 and a long cutter bar 65, wherein the synchronous belt sliding table 62 is horizontally disposed and both ends of the synchronous belt sliding table are fixed on the frame 10, the synchronous belt sliding table 62 is powered by the motor 61, the sliding seat 63 is connected with the synchronous belt sliding table 62, the second pneumatic shearing tool 64 is fixed on the sliding seat 63, and the second pneumatic shearing tool 64 is driven to transversely slide by the synchronous belt sliding table 62; the long cutter bar 65 is arranged below the synchronous belt sliding table 62 and is matched with the second pneumatic shearing knife 64 to finish transverse cutting; the long knife bar 65 is fixed on the frame 10 through a knife locking frame 66, the knife locking frame 66 is horizontally arranged, and two ends of the long knife locking frame 66 are fixed on the frame 10.

When the sheet needs to be transversely cut, the main driving mechanism 50 stops working, the upper pressing roller 72 of the pressing mechanism 70 presses the sheet through the first air cylinders 73 (two first air cylinders 73 are generally arranged), the second pneumatic shearing knife 64 moves on the synchronous belt sliding table 62 through the sliding seat 63, the motor 61 drives the synchronous belt sliding table 62, and the second pneumatic shearing knife 64 is matched with the long knife bar 65 to cut the sheet up and down.

More preferably, the transverse cutting mechanism 60 further includes a receiving plate 67, two ends of the receiving plate 67 are fixed on the frame 10, a through hole 671 for matching with the second pneumatic shearing blade 64 to slide transversely is formed in the receiving plate 67, the locking blade carrier 66 is disposed below the receiving plate 67, and the long blade 65 is disposed below the through hole 671 (see fig. 11). The sheet is cut transversely by the receiving plate 67 to maintain a horizontal flat cut surface, i.e. the sheets on both sides of the cut line lie on the same horizontal plane.

The pressing mechanism is matched with the transverse cutter mechanism 60, so that the film tearing angle is improved, and the defect that the feeding of the belt materials is not smooth due to the fact that plastic films are adhered, namely the film is not good is overcome.

Third, referring to fig. 2, the main driving mechanism 50 includes a driving roller 51 and a driven pressing roller 52 that are disposed in parallel, the driven pressing roller 52 provides a pressing force through a second air cylinder 53, and the second air cylinder 53 is disposed above the driven pressing roller 52; the driving roller 51 is driven by a servo motor 54 to provide sheet advancing power, and the driving roller 51 synchronously drives the lower cutter roller 44. In operation, the driven compaction roller 52 provides compaction force by the second air cylinders 53 (two second air cylinders 53 are generally arranged), and the feeding size is accurately controlled through the main driving mechanism 50.

Embodiment III:

referring to fig. 7 to 10, the present embodiment provides a preferred implementation manner of the film winding mechanism, which can overcome the problem that the film winding shaft 21 shakes or even unhooks due to the air source pulsation of the air cylinder, so that the swing hook 241 cannot support the shaft end, and potential safety hazards exist; when the diameter of the rolled film is increased, the rolled film automatically slips when the feeding speed of the main driving mechanism is higher than the feeding speed, and the like, and the method is as follows:

referring to fig. 1 and 7, the film winding mechanism 20 includes two film winding shafts 21, a third cylinder 22, a rocker 23, a parallel four-bar mechanism 24, and a limiting device 25, wherein the film winding shaft 21 is sleeved with a paper tube 215, one end of the third cylinder 22 is mounted on one side of the frame 10, the other end of the third cylinder is movably connected with one end of the rocker 23 and the parallel four-bar mechanism 24, the other end of the rocker 23 is movably connected with the frame 10, the parallel four-bar mechanism 24 is mounted on the frame 10 and is on the same side as the third cylinder 22, one end of the two film winding shafts 21 is fixed on the other side of the frame 10, the other end of the parallel four-bar mechanism 24 is supported by the rocker 23, the parallel four-bar mechanism 24 is driven to rotate when the third cylinder 22 is contracted, the limiting device 25 is adjacently arranged beside the rocker 23, and the stop position of the rocker 23 is controlled by the limiting device 25, so that the film winding mechanism 20 can support the film winding shaft 21 by utilizing the dead center characteristic of the parallel four-bar mechanism 24.

The film winding mechanism 20 is operated by winding protective films on two sides of a sheet on a paper cylinder 215 of the film winding shaft 21, and a third cylinder 22 drives the parallel four-bar mechanism 24 and the rocker 23, and the stop position of the rocker 23 is controlled by the rocker 23 and a limiting device 25, so that the film winding mechanism 20 can achieve the effect of supporting the other ends of the two film winding shafts 21 by utilizing the dead center characteristic of the parallel four-bar mechanism 24 at the stop position, the supporting function is kept without using cylinder force, and the hidden trouble that the shaft ends cannot be supported due to automatic unhooking when the third cylinder 22 is slightly released is avoided. When the paper tube 215 needs to be disassembled, the film winding shaft 21 stops rotating, and the third cylinder 22 drives the parallel four-bar mechanism 24 and the rocker 23, so that the other ends of the two film winding shafts 21 are simultaneously separated from the parallel four-bar mechanism 24, the paper tube 215 is pulled out, and the paper tube 215 is quickly replaced.

Referring to fig. 7, the parallel four-bar linkage 24 includes two swing hooks 241 disposed in parallel up and down, a connecting rod 242 and a supporting rod 243, wherein the two swing hooks 241 are rotatably connected with the frame 10, the hook head of the swing hook 241 supports the other end of the film winding shaft 21, the upper end and the lower end of the connecting rod 242 are respectively movably connected with the tail end of the swing hook 241, the lower end of the connecting rod 242 is also movably connected with one end of the supporting rod 243, and the other end of the supporting rod 243 is movably connected with the third cylinder 22 and one end of the rocker 23; when the two film winding shafts 21 are in a working state, the parallel four-bar mechanism 24 supports the two film winding shafts 21, and the connecting bar 242 and the supporting bar 243 are positioned on the same straight line and perpendicular to the ground. The stop position of the rocker 23 is adjusted through the rocker 23 and the limiting device 25, so that the connecting rod 242 and the supporting rod 243 are ensured to be collinear, and the function of supporting the shaft ends of the two film winding shafts 21 is achieved by utilizing the dead point characteristic when the connecting rod 242 and the supporting rod 243 are collinear. When the paper tube 215 needs to be replaced, the third air cylinder 22 contracts, the rocker 23 and the support rod 243 are driven, the position of the support rod 243 moves obliquely upwards, the connecting rod 242 is pushed to move upwards, under the action of the lever principle, the hook head of the swing hook 241 moves downwards, and the other ends of the two film winding shafts 21 are unhooked, so that the paper tube 215 can be replaced without disassembling the two film winding shafts 21. Preferably, the two film winding shafts 21 are air expansion shafts, when in operation, the air expansion shafts are used for inflating and expanding the paper cylinder 215 to wind films, when in disassembly, the air expansion shafts are used for deflating, and the third air cylinder 22 drives the swing hook 241 to unhook, so that the upper paper cylinder 215 and the lower paper cylinder 215 can be rapidly pulled out for replacement.

Referring to fig. 8, the limiting device 25 specifically includes a fixing base 251, a bolt 252 for pushing against the rocker 23, and a first nut 253, wherein the fixing base 251 is fixed on the frame 10, the bolt 252 passes through the fixing base 251 and is in threaded connection with the fixing base 251, the first nut 253 is sleeved on the bolt 252, and the position of the bolt 252 is locked and fixed by the first nut 253. When the parallel four-bar mechanism 24 supports the two film winding shafts 21 to work, the position of the rocker 23 is adjusted through the adjusting bolt 252, so that the alignment of the connecting rod 242 and the supporting rod 243 is ensured, and the function of supporting the shaft ends of the two film winding shafts 21 is achieved by utilizing the dead point characteristic when the connecting rod 242 and the supporting rod 243 are aligned.

Referring to fig. 9 and 10, the film winding mechanism 20 further includes a first motor 216, a coupling 26, a connection disc 27 and a torque retainer 28, which are fixedly connected in sequence, wherein the shaft end of the film winding shaft 21 is connected with the torque retainer 28; the film winding shaft 21 is fixed on the frame 10 through a bearing 211 and a bearing seat 212, two second nuts 213 are arranged at the shaft ends of the film winding shaft 21, a stop washer 214 is arranged between the two second nuts 213, the film winding shaft 21 and the bearing 211 are positioned through the two second nuts 213, and the shaft ends of the film winding shaft 21 are prevented from being separated from the bearing 211 due to vibration during operation. Through the torque retainer 28 pre-adjusts the torque, when the film winding shaft 21 works, the film material is continuously wound on the film winding shaft 21, the diameter of the whole film winding shaft 21 (containing the film material) is increased, and the film winding speed is automatically slipped when being greater than the feeding speed of the main driving mechanism, so that the feeding precision is ensured.

Referring to fig. 1 and 2, the film winding mechanism 20 is used for guiding the film laminating direction through two transition rollers 29, specifically: the two ends of the transition roller 29 are fixed on the frame 10 and located at the rear of the film winding shaft 21, so that the film firstly passes through the transition roller 29 and then is wound on the film winding shaft 21.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A sheet cutter, characterized in that: the automatic film rolling machine comprises a frame (10), a film rolling mechanism (20), and a feeding table (30), a slitting cutter mechanism (40), a main driving mechanism (50) and a transverse cutter mechanism (60) which are fixed on the frame (10) and are sequentially arranged from front to back, wherein the film rolling mechanism (20) is fixed at the front part of the frame (10) and is arranged in parallel with the feeding table (30) up and down;

the longitudinal cutter mechanism (40) comprises a cutter holder (41), a first pneumatic cutter (42) and a lower cutter roller (44), wherein two ends of the cutter holder (41) are horizontally fixed on the frame (10), the first pneumatic cutter (42) is fixed on the cutter holder (41), the lower cutter roller (44) is fixed below the cutter holder (41), a hob (43) is arranged on the lower cutter roller (44) at a position corresponding to the first pneumatic cutter (42), the first pneumatic cutter (42) is arranged in one-to-one correspondence with the hob (43), and when the cutter is used for cutting, the first pneumatic cutter (42) and the hob (43) are matched to complete longitudinal cutting, and the lower cutter roller (44) is synchronously driven by the main driving mechanism (50); the sheet enters a longitudinal cutter mechanism (40) after passing through a feeding table (30) to finish longitudinal cutting;

the main driving mechanism (50) provides sheet advancing power and synchronously drives the lower cutter roller (44); after passing through the main driving mechanism (50), the longitudinally cut sheet is transversely cut by the transverse cutter mechanism (60) when transverse cutting is required;

after the film on the sheet is attached to the sheet and sequentially passes through the feeding table (30), the slitting knife mechanism (40) and the main driving mechanism (50), the film is torn and wound by the film winding mechanism (20), so that the film and the sheet are separated; the film winding mechanism (20) comprises two film winding shafts (21), a third air cylinder (22), a rocker (23), a parallel four-bar mechanism (24) and a limiting device (25), wherein a paper cylinder (215) is sleeved on the film winding shafts (21), one end of the third air cylinder (22) is installed on one side surface of the frame (10), the other end of the third air cylinder is movably connected with one end of the rocker (23) and the parallel four-bar mechanism (24), the other end of the rocker (23) is movably connected with the frame (10), the parallel four-bar mechanism (24) is installed on the frame (10) and is on the same side as the third air cylinder (22), one end of the two film winding shafts (21) is fixed on the other side surface of the frame (10), the other end of the parallel four-bar mechanism (24) is supported, the rocker (23) is driven to rotate when the third air cylinder (22) contracts, the limiting device (25) is adjacent to the rocker (23) and the parallel four-bar mechanism (24) is movably connected with the frame (10), and the film winding mechanism (20) can be supported by the aid of the limiting device (25).

2. A sheet cutter as defined in claim 1 wherein: the automatic feeding device is characterized by further comprising a material pressing mechanism (70), wherein the material pressing mechanism (70) is arranged between the main driving mechanism (50) and the transverse cutter mechanism (60), the material pressing mechanism (70) comprises a lower roller (71) and an upper pressing roller (72), the upper pressing roller (72) is provided with a pressing force by a first air cylinder (73), and the first air cylinder (73) is arranged above the upper pressing roller (72); when the main driving mechanism (50) feeds, the upper pressing roller (72) is in a loosening state to ensure smooth feeding, the upper pressing roller (72) presses the sheet during blanking, the transverse cutter mechanism (60) transversely cuts off the sheet, a film on the sheet is attached to the sheet and sequentially passes through the feeding table (30), the longitudinal cutter mechanism (40), the main driving mechanism (50) and the pressing mechanism (70), and the film is torn and wound through the film winding mechanism (20), so that separation of the film and the sheet is realized.

3. A sheet cutter as defined in claim 1 wherein: the main driving mechanism (50) comprises a driving roller (51) and a driven pressing roller (52) which are arranged in parallel up and down, the driven pressing roller (52) provides pressing force through a second air cylinder (53), and the second air cylinder (53) is arranged above the driven pressing roller (52); the driving roller (51) is driven by a servo motor (54) to provide sheet advancing power, and the driving roller (51) synchronously drives the lower cutter roller (44).

4. A sheet cutter as defined in claim 1 wherein: the transverse cutter mechanism (60) comprises a motor (61), a synchronous belt sliding table (62), a sliding seat (63), a second pneumatic cutter (64) and a long cutter bar (65), wherein the synchronous belt sliding table (62) is horizontally arranged, two ends of the synchronous belt sliding table are fixed on the frame (10), the synchronous belt sliding table (62) is powered by the motor (61), the sliding seat (63) is connected with the synchronous belt sliding table (62), and the second pneumatic cutter (64) is fixed on the sliding seat (63) and drives the second pneumatic cutter (64) to transversely slide through the synchronous belt sliding table (62); the long cutter bar (65) is arranged below the synchronous belt sliding table (62) and matched with the second pneumatic shearing knife (64) to finish transverse cutting; the long knife bar (65) is fixed on the frame (10) through a knife locking frame (66), and the knife locking frame (66) is horizontally arranged and two ends of the knife locking frame are fixed on the frame (10).

5. A sheet cutter as defined in claim 4 wherein: the transverse cutting mechanism (60) further comprises a bearing plate (67), two ends of the bearing plate (67) are fixed on the frame (10), a through hole (671) for matching the second pneumatic shearing knife (64) to transversely slide is transversely formed in the bearing plate (67), the knife locking frame (66) is arranged below the bearing plate (67), and the long knife bar (65) is arranged below the through hole (671).

6. A sheet cutter as defined in claim 1 wherein: the parallel four-bar mechanism (24) comprises two swinging hooks (241) which are arranged in parallel up and down, a connecting rod (242) and a supporting rod (243), wherein the two swinging hooks (241) are both rotationally connected with the frame (10), the other end of the film winding shaft (21) is supported by the hook head of the swinging hooks (241), the upper end and the lower end of the connecting rod (242) are respectively and movably connected with the tail end of the swinging hooks (241), the lower end of the connecting rod (242) is also movably connected with one end of the supporting rod (243), and the other end of the supporting rod (243) is movably connected with the third cylinder (22) and one end of the rocking rod (23); when the two film winding shafts (21) are in a working state, the parallel four-bar mechanism (24) supports the two film winding shafts (21), and the connecting bar (242) and the supporting bar (243) are positioned on the same straight line and are perpendicular to the ground.

7. A sheet cutter as defined in claim 1 wherein: the film winding mechanism (20) further comprises a first motor (216), a coupler (26), a connecting disc (27) and a torque retainer (28) which are sequentially and fixedly connected, wherein the first motor is used for driving the film winding shaft (21), and the shaft end of the film winding shaft (21) is connected with the torque retainer (28); the film winding shaft (21) is fixed on the frame (10) through a bearing (211) and a bearing seat (212), two second nuts (213) are arranged at the shaft ends of the film winding shaft (21), a stop washer (214) is arranged between the two second nuts (213), the film winding shaft (21) and the bearing (211) are positioned through the two second nuts (213), and the shaft ends of the film winding shaft (21) are prevented from being separated from the bearing (211) due to vibration during operation.

8. A sheet cutter as defined in claim 1 wherein: the film winding mechanism (20) further comprises two transition rollers (29), two ends of each transition roller (29) are fixed on the frame (10) and located behind the film winding shaft (21), so that the film is firstly passed through each transition roller (29) and then wound on the film winding shaft (21), and each transition roller (29) is used for guiding the trend of the film.

9. A sheet cutter as defined in claim 1 wherein: set up two limit baffle (31) on material loading platform (30), spout (32) are transversely seted up to material loading platform (30) level, limit baffle (31) are fixed in on spout (32), through the adjustment limit baffle (31) fixed position on spout (32), the distance between two limit baffle (31) is adjusted to match different broad width sheets, prevent sheet advancing process off tracking.