CN112936984A - Automatic die-cutting indenting machine - Google Patents

Automatic die-cutting indenting machine Download PDF

Info

Publication number
CN112936984A
CN112936984A CN202110167386.5A CN202110167386A CN112936984A CN 112936984 A CN112936984 A CN 112936984A CN 202110167386 A CN202110167386 A CN 202110167386A CN 112936984 A CN112936984 A CN 112936984A
Authority
CN
China
Prior art keywords
driving
die
cutting
plate
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110167386.5A
Other languages
Chinese (zh)
Inventor
陈月民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Bright Point Printing & Packaging Co ltd
Original Assignee
Hangzhou Bright Point Printing & Packaging Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Bright Point Printing & Packaging Co ltd filed Critical Hangzhou Bright Point Printing & Packaging Co ltd
Priority to CN202110167386.5A priority Critical patent/CN112936984A/en
Publication of CN112936984A publication Critical patent/CN112936984A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/02Feeding or positioning sheets, blanks or webs
    • B31B50/04Feeding sheets or blanks
    • B31B50/042Feeding sheets or blanks using rolls, belts or chains
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/02Feeding or positioning sheets, blanks or webs
    • B31B50/04Feeding sheets or blanks
    • B31B50/06Feeding sheets or blanks from stacks
    • B31B50/066Feeding sheets or blanks from stacks from above a magazine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/02Feeding or positioning sheets, blanks or webs
    • B31B50/04Feeding sheets or blanks
    • B31B50/07Feeding sheets or blanks by air pressure or suction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/142Cutting, e.g. perforating, punching, slitting or trimming using presses or dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/20Cutting sheets or blanks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74Auxiliary operations
    • B31B50/92Delivering
    • B31B50/98Delivering in stacks or bundles

Landscapes

  • Making Paper Articles (AREA)

Abstract

The application relates to an automatic die-cutting indenting machine which comprises a feeding mechanism, a die-cutting mechanism and a discharging mechanism. The feeding mechanism feeds the stacked paperboards into the die cutting mechanism one by one for die cutting, and the paper after die cutting is taken out of the die cutting mechanism one by the discharging mechanism, so that efficient die cutting production is realized.

Description

Automatic die-cutting indenting machine
Technical Field
The application relates to the field of paperboard cutting, in particular to an automatic die-cutting creasing machine.
Background
The die cutting process is the most commonly used process for packaging printed matters, namely, the forming process of rolling and cutting the printed matters or other ring-packed blanks into required shapes or cutting marks by using a die cutting knife to combine into a die cutting plate according to patterns of product design requirements under the action of pressure. The indentation process is to press line marks on the plate material under the action of pressure by using a line pressing knife or a line pressing die, or to bend and form the plate material at a preset position by using a line rolling wheel. Generally, the die cutting and indentation process is a process of combining a die cutting knife and a line pressing knife in the same template and simultaneously performing die cutting and indentation processing on a die cutting machine, which is referred to as die cutting for short.
The structure of present die cutting indentator is provided with only a pay-off slip table, and its operation flow is: manually feeding by hands, firstly placing a paper board to be processed on a feeding sliding table, then pushing the feeding sliding table onto an indentation station by hands, then carrying out indentation and die cutting on the paper board by a cutting die, and manually pulling out the feeding sliding table from the indentation station to carry out finished product blanking and start a new round of feeding of the paper board to be processed after the paper board is subjected to indentation and die cutting.
The die-cutting marking press with the structure can only feed one paperboard at a time, has low production efficiency and does not meet the requirement of large-scale batch production of enterprises.
Disclosure of Invention
In order to improve production efficiency, the application provides an automatic die cutting indentator adopts following technical scheme:
the utility model provides an automatic die-cutting indenting machine, includes feed mechanism and die-cutting mechanism, feed mechanism includes first material loading subassembly and second material loading subassembly, first material loading subassembly includes the material loading frame, is used for placing the last flitch of cardboard, is used for driving the first actuating mechanism of going up the flitch and moving along vertical direction, is used for sucking up the cardboard on the flitch and transports the sucking disc mechanism on the second material loading subassembly, second material loading subassembly is including being used for transmitting the conveyer on the die-cutting mechanism with the cardboard, sucking disc mechanism includes first sucking disc group, second sucking disc group, is used for driving first driving piece that first sucking disc group moved along vertical direction, is used for driving the second driving piece that second sucking disc group moved towards the conveyer, second sucking disc group is located first sucking disc group and is close to conveyer one side.
Through adopting above-mentioned technical scheme, on putting the flitch of going up with a pile of cardboard that needs the cross cutting, the interval that drives cardboard and the first sucking disc group of the top through a actuating mechanism keeps certain. The first sucking disc group downwards sucks the uppermost paper board, then the first sucking disc group drives the paper board to move upwards until the paper board is abutted to the second sucking disc group, the second sucking disc group sucks the paper board, the first sucking disc group cancels the suction to the paper board, and then the second sucking disc group drives the paper board to move towards the conveyor until the paper board is placed on the conveyor. The paper boards are placed on the conveyor at intervals in cooperation with the conveying of the conveyor, so that the paper boards can be conveyed to the die cutting mechanism intermittently by the conveyor for die cutting. The process can ensure that the paper boards are continuously provided for the die cutting mechanism, and only a stack of paper boards needs to be manually placed on the feeding plate. Convenient operation has reduced the time of artifical material loading, has improved production efficiency.
Preferably, the conveyer is close to first material loading subassembly one end top and is equipped with drive roller set, drive roller set is including installing drive roller frame on the conveyer, rotate the axis of rotation of connecting in drive roller frame, being used for driving the axis of rotation and rotating third driving piece, fixed mounting in the epaxial drive roller of axis of rotation, be equipped with the clearance between drive roller and the conveyer.
Through adopting above-mentioned technical scheme, when second sucking disc group drive cardboard moved along the horizontal direction, only need make the cardboard move to fill in between drive roller and the conveyer can. The sheets can then be pulled by the drive of the drive rollers and conveyor away from the stack and completely onto the conveyor. Thereby reducing the amplitude of the reciprocating motion required by the second sucker group.
Preferably, first sucking disc group includes first sucking disc seat and along the first sucking disc of a plurality of conveyer width direction row terminal surface under first sucking disc seat, second sucking disc group includes second sucking disc seat and along conveyer width direction row in a plurality of second sucking disc of terminal surface under the second sucking disc seat, first sucking disc group and second sucking disc group all are located the cardboard and keep away from conveyer one end.
By adopting the technical scheme, the resistance received by lifting the edges of the paper boards is the minimum for the stacked paper boards. The first sucking disc group can suck and lift the paper board more smoothly and easily.
Preferably, the die-cutting mechanism comprises a die-cutting frame, an upper template provided with a cutter assembly, a lower template and a second driving mechanism for driving the upper template to move along the vertical direction, and the automatic die-cutting creasing machine further comprises a discharging mechanism for driving paper on the lower template to discharge.
By adopting the technical scheme, after the paperboard moves to the lower template, the second driving mechanism drives the upper template to move towards the lower template, so that die cutting is completed. After die cutting is finished, the paperboard leaves the lower template through the discharging mechanism, so that the manual labor time is reduced, and the production efficiency is improved.
Preferably, discharge mechanism includes the drive chain subassembly, and the drive chain subassembly is equipped with two and is located the lower bolster both sides respectively, the drive chain subassembly includes drive chain, is used for driving drive chain pivoted drive sprocket and is used for drive sprocket pivoted fourth driver, be equipped with the drive plate on at least one chain link of drive chain.
Through adopting above-mentioned technical scheme, after the conveyer transported the cardboard to the lower bolster, drive chain rotated, pushed the established position mutually with the cardboard until drive plate butt on the drive chain in the cardboard. Thereby ensuring that the paperboard can be ready for die cutting. And after the die cutting is finished, the driving chain continues to rotate, the driving plate continues to push the paper board forwards, and the paper board is pushed down from the lower template to finish the discharging.
Preferably, the die-cutting mechanism further comprises a third driving mechanism for driving the lower template to move along the vertical direction.
By adopting the technical scheme, after the paperboard is pushed to the accurate position by the driving plate, the paperboard is taken away from the driving chain by the lower template in an ascending manner, and the upper template is matched with the lower template in a descending manner to complete die cutting. After die cutting is completed, the lower template moves downwards to place the paper board on the driving chain. Thereby avoiding the influence on the paper board caused by die cutting of the driving chain.
Preferably, the die-cutting mechanism includes cope match-plate pattern, lower bolster and cutter unit spare, cutter unit spare includes cutter, mount pad, connecting seat and sponge strip, the cutter is equipped with a plurality of and every slice cutter length respectively with wait to cut each limit length of side the same, mount pad fixed mounting is on the cutter, and a mount pad corresponds a cutter, just the mount pad is used for installing the cope match-plate pattern towards lower bolster one side with the cutter, the length of mount pad is less than its cutter length that corresponds, the holding tank has been seted up on the connecting seat, all the mount pad all inlays and locates in the holding tank and arranges the alignment, be equipped with on the connecting seat and be used for making the mount pad fixed locking mechanical system relatively to the connecting seat, the sponge strip is equipped with two, and pastes in all mount pad up end both sides respectively.
Through adopting above-mentioned technical scheme, when the installation, install the cutter on the mount pad that corresponds earlier, then with all mount pads arrange install the holding tank of connecting seat in, install the sponge strip again on the mount pad up end, the sponge strip is located the cutter both sides. After the step is finished, the mounting seat is taken down from the connecting seat, and is sequentially mounted on the upper template according to the shape needing die cutting, so that a cutter pattern which is the same as the shape needing die cutting is formed. And the two sides of the cutter are provided with sponges.
When die cutting is carried out, when the upper die plate moves downwards, the sponge contacts the paper plate to press the paper plate, and then the sponge moves downwards continuously until the cutter contacts the paper plate to carry out die cutting on the paper plate. The sponge can play the role of pre-fixing and buffering, so that the paperboard can be better die-cut. Meanwhile, the sponge strip is installed in a mode that the sponge strip does not need to be cut according to the length of the cutter and then manually pasted to the corresponding position of the upper template in sequence. The cutter assembly can be processed more quickly.
Preferably, the cope match-plate pattern is the plank, the mount pad includes the installation department of being connected with the cutter, can dismantle the first connecting portion of being connected and be used for with the second connecting portion of cope match-plate pattern installation through joint and installation department, the second connecting portion include the screw rod, be equipped with on the cope match-plate pattern be used for with screw rod complex screw.
By adopting the technical scheme, the upper template is a wood board, so that the material cost can be reduced. When the installation seat is installed, the second connecting part can be directly connected to the upper template through threads, and then the installation part is clamped to the first connecting part, so that the operation is convenient.
Preferably, the upper die plate is provided with a groove for embedding the mounting seat, and when the mounting seat is embedded in the groove, the sponge abuts against the upper die plate.
Through adopting above-mentioned technical scheme to make cope match-plate pattern overall structure intensity increase. Meanwhile, the end face of the whole sponge strip can be abutted against the upper template, so that the sponge strip can be deformed more uniformly when the upper template moves downwards, and is abutted against the paperboard.
Preferably, first connecting portion include fixed connection in the plug connector of screw rod upper end, the caulking groove has been seted up towards plug connector one side to the installation department, the caulking groove cross-section is the polygon, the plug connector inlays and locates in the caulking groove and the caulking groove slides relatively, the plug connector outer wall is equipped with the joint arch, the caulking groove inner wall seted up with the protruding complex joint recess of joint, the joint recess is equipped with two along the caulking groove axial.
Through adopting above-mentioned technical scheme, when the installation mount pad, can insert earlier the plug connector and establish in the caulking groove, the joint arch this moment inlays and locates in the first joint recess, then directly with second connecting portion threaded connection to the cope match-plate pattern on, relative caulking groove slip plug connector again makes the joint arch inlay establish in another joint caulking groove. The installation part can move towards the upper die plate and then be embedded into the groove, and installation is completed.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the feeding, die cutting and discharging can be continuously carried out, so that the production efficiency is improved;
2. the die cutting can be stable and smooth;
3. the cutter with the sponge strips can be conveniently installed on the upper template.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
FIG. 2 is a sectional view of the first embodiment.
FIG. 3 is a cross-sectional view of a die cutting mechanism in a first embodiment.
FIG. 4 is a sectional view of a loading mechanism according to a first embodiment.
Fig. 5 is a schematic structural diagram of a feeding mechanism in the first embodiment.
FIG. 6 is a schematic view of a die cutting mechanism according to one embodiment.
FIG. 7 is a sectional view of a discharging mechanism according to the first embodiment.
FIG. 8 is a schematic structural diagram of a discharging mechanism in the first embodiment.
FIG. 9 is a schematic view showing the structure of the upper plate, the sponge strip and the cutter in the second embodiment.
Fig. 10 is a schematic structural diagram of the connecting seat, the mounting seat and the cutter in the second embodiment.
Fig. 11 is a cross-sectional view of the cutter assembly of the second embodiment except for the connecting base.
Description of reference numerals: 1. a feeding mechanism; 2. a die-cutting mechanism; 3. a discharging mechanism; 4. a die cutting frame; 5. a cutter assembly; 6. mounting a template; 7. a lower template; 8. a second drive mechanism; 9. a third drive mechanism; 10. an upper drive cylinder; 11. a push plate is arranged; 12. a push rod is arranged; 13. a lower drive cylinder; 14. a lower push plate; 15. a lower push rod; 16. a first feeding assembly; 17. a second feeding assembly; 18. a drive roller set; 19. a feeding frame; 20. feeding plates; 21. a drive chain set; 22. a first suction disc group; 23. a first driving member; 24. a second sucker group; 25. a second driving member; 26. a drive chain; 27. a drive sprocket; 28. a first chuck base; 29. a first suction cup; 30. a second sucker seat; 31. a second suction cup; 32. a drive roller frame; 33. a rotating shaft; 34. a third driving member; 35. a drive roller; 36. mounting an arm; 37. a return spring; 38. a drive chain assembly; 39. a material receiving assembly; 40. a drive chain; 41. a drive sprocket; 42. a fourth drive; 43. a material receiving frame; 44. a material collecting plate; 45. a cutter; 46. a mounting seat; 47. a connecting seat; 48. a sponge strip; 49. accommodating grooves; 50. a limit bolt; 51. a groove; 52. a screw hole; 53. a first connection portion; 54. a second connecting portion; 55. an installation part; 56. caulking grooves; 57. clamping the bulges; 58. clamping the groove; 59. a drive plate; 60. briquetting; 61. a spring lever; 62. and a baffle plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-11.
The first embodiment is as follows:
the embodiment of the application discloses an automatic die cutting indenting machine. Referring to fig. 1, an automatic die-cutting indenting machine includes a feeding mechanism 1, a die-cutting mechanism 2, and a discharging mechanism 3. The feeding mechanism 1 feeds the stacked paper boards into the die cutting mechanism 2 one by one for die cutting, and the paper after die cutting is taken out of the die cutting mechanism 2 one by the discharging mechanism 3, so that efficient die cutting production is realized.
Specifically, referring to fig. 2, the die-cutting mechanism 2 includes a die-cutting frame 4, an upper die plate 6 on which a cutter assembly 5 is mounted, a lower die plate 7, a second driving mechanism 8, and a third driving mechanism 9. The upper template 6 and the lower template 7 are both connected to the die cutting frame 4 in a sliding mode along the vertical direction. The second driving mechanism 8 drives the upper template 6 to move relative to the cutting frame 4 along the vertical direction. The third driving mechanism 9 drives the lower template 7 to move along the vertical direction relative to the die cutting frame 4.
After the feeding mechanism 1 feeds the paperboard to the lower template 7, the second driving mechanism 8 drives the upper template 6 to move downwards, and the third driving mechanism 9 drives the lower template 7 to move upwards, so that the cutter assembly 5 contacts the paperboard, and die cutting of the paperboard is completed.
Referring to fig. 2 and 3, in particular, the second driving mechanism 8 is an upper driving cylinder 10, an upper push plate 11 and an upper push rod 12. The upper push rods 12 are four and are respectively fixedly arranged at four corners of the upper push plate 11, and the upper push rods 12 are fixedly connected to the upper template 6. The upper driving cylinder 10 is arranged along the vertical direction, the cylinder body of the upper driving cylinder 10 is fixedly arranged on the die cutting frame 4, and the piston rod of the upper driving cylinder 10 is fixedly arranged on the upper push plate 11. The upper push plate 11 and the upper push rod 12 are driven by the upper driving cylinder 10 to move along the vertical direction, so that the upper template 6 is driven to move along the vertical direction.
Referring to fig. 2 and 3, the third driving mechanism 9 is a lower driving cylinder 13, a lower push plate 14, and a lower push rod 15. The lower push rods 15 are four and are respectively fixedly arranged at four corners of the lower push plate 14, and the lower push rods 15 are fixedly connected to the lower die plate 7. The lower driving cylinder 13 is arranged along the vertical direction, the cylinder body of the lower driving cylinder 13 is fixedly arranged on the die cutting frame 4, and the piston rod of the lower driving cylinder 13 is fixedly arranged on the lower push plate 14. The lower push plate 14 and the lower push rod 15 are driven by the lower driving cylinder 13 to move along the vertical direction, so that the lower template 7 is driven to move along the vertical direction.
Referring to fig. 4 and 5, the loading mechanism 1 includes a first loading assembly 16, a second loading assembly 17, and a drive roller group 18. The first feeding assembly 16 includes a feeding frame 19, a feeding plate 20 for placing the paper boards, a first driving mechanism for driving the feeding plate 20 to move in a vertical direction, and a suction cup mechanism for sucking up the paper boards on the feeding plate 20 and transporting the paper boards to the second feeding assembly 17. The second feeding assembly 17 comprises a conveyor for conveying the cardboard sheets to the die-cutting means 2. The two ends of the conveyor respectively receive the discharge end of the first feeding assembly 16 and the lower template 7.
Referring to fig. 4 and 5, the suction cup mechanism includes a first suction cup group 22, a second suction cup group 24, a first driving member 23 for driving the first suction cup group 22 to move in a vertical direction, and a second driving member 25 for driving the second suction cup group 24 to move toward the conveyor. The first suction cup set 22 and the second suction cup set 24 are both located at the end of the sheet remote from the conveyor. The second suction cup set 24 is located on the side of the first suction cup set 22 adjacent the conveyor. A drive roller set 18 is provided above one end of the conveyor adjacent the first loading assembly 16. A gap is provided between the drive roller set 18 and the conveyor.
When feeding, a stack of paper boards is placed on the feeding plate 20, and the distance between the uppermost paper board and the first suction disc group 22 is kept constant by the first driving mechanism. The first suction disc group 22 descends to suck one end of the uppermost paper board, then the first suction disc group 22 drives the paper board to move upwards until the paper board abuts against the second suction disc group 24, the second suction disc group 24 sucks the paper board, the first suction disc group 22 cancels the suction force on the paper board, and then the second suction disc group 24 drives the paper board to move towards the conveyor until the paper board enters the gap between the driving roller group 18 and the conveyor. The transmission of the conveyor and the driving of the driving roller group 18 are matched, so that the paper boards are smoothly fed onto the conveyor. And repeating the steps to enable a plurality of paper boards to be placed on the conveyor at intervals, and intermittently conveying the paper boards onto the lower template 7 by the conveyor to finish feeding.
The first suction disc group 22 sucks up one end of the paper sheet during suction, and the resistance is small. And because the second sucker group 24 only needs to drive the paper board to enter the gap between the driving roller group 18 and the conveyor, the second sucker group 24 only needs to drive the paper board to move for a small distance, the required work is small, and the action can be stably realized.
Referring to fig. 4 and 5, in particular, the first drive mechanism includes four drive chain sets 21. The four driving chain sets 21 correspond to four corners of the upper material plate 20 respectively. The drive chain set 21 includes a drive chain 26, a drive sprocket 27 and a motor. The two driving sprockets 27 are arranged along the vertical direction, and the driving chain 26 is sleeved outside the two driving sprockets 27. The motor drives one of the drive sprockets 27 to rotate. The upper plate 20 is fixedly connected to a link of the drive chain 26. The driving chain wheel 27 is driven by the motor to rotate, thereby driving the driving chain 26 to rotate. Thereby achieving driving of the upper plate 20 in the vertical direction.
Referring to fig. 4 and 5, the first suction cup group 22 includes a first suction cup holder 28, a first suction cup 29, and a first air pump. The first suction cups 29 are arranged in a plurality and are arranged on the lower end surface of the first suction cup seat 28 along the width direction of the conveyor. The first air pump is used for exhausting air in the first suction cup 29, thereby adjusting the suction force of the first suction cup 29 to the object. The first driving member 23 is an air cylinder and is disposed along a vertical direction, the cylinder body of the first driving member 23 is fixedly connected to the upper material frame 19, and the piston rod of the first driving member 23 is fixedly connected to the first chuck base 28. The first driving member 23 drives the first suction disc group 22 to move in the vertical direction by the extension and contraction of the piston rod.
Referring to fig. 4 and 5, the second suction cup group 24 includes a second suction cup holder 30, a second suction cup 31, and a second air pump. The second suction cups 31 are arranged on the lower end surface of the second suction cup seat 30 along the width direction of the conveyor. The second air pump is used for exhausting air in the first suction cup 29, thereby adjusting the suction force of the second suction cup 31 to the object. The second driving member 25 is a cylinder and is disposed along the horizontal direction, the cylinder body of the second driving member 25 is fixedly connected to the material loading frame 19, and the piston rod of the second driving member 25 is fixedly connected to the side wall of the second suction cup seat 30. The second drive 25 extends and retracts through the piston rod to move the first suction cup group 22 in a direction toward or away from the conveyor.
Referring to fig. 4 and 5, the driving roller set 18 includes a driving roller frame 32 mounted on the conveyor, a rotating shaft 33 rotatably connected to the driving roller frame 32, a third driving member 34 for driving the rotating shaft 33 to rotate, and a driving roller 35 fixedly mounted on the rotating shaft 33, wherein a gap is provided between the driving roller 35 and the conveyor. The third driving member 34 is a motor, the body of the third driving member 34 is fixedly mounted on the driving roller frame 32, and the output end of the third driving member 34 is coaxially connected to the rotating shaft 33. By rotating the drive roller 35, the paper board is driven to move towards the conveyor, so that the paper board can be stably fed onto the conveyor under the cooperation of the drive roller group 18 and the conveyor.
Referring to fig. 4 and 5, in order to ensure that the paper sheets can stably enter the gap between the driving roller set 18 and the conveyor, mounting arms 36 are fixedly mounted at both ends of the driving roller frame 32, and the mounting arms 36 are rotatably connected to the conveyor. A return spring 37 is arranged between the mounting arm 36 and the conveyor, and two ends of the return spring 37 are fixedly connected to the mounting arm 36 and the conveyor respectively. The return spring 37 keeps the drive roller group 18 in a state of being spaced from the belt surface.
As the sheet enters between the drive roller set 18 and the conveyor, the return spring 37 is stretched so that the sheet enters between the drive roller set 18 and the conveyor gap, while ensuring that the drive roller 35 is against the sheet. And thus the drive roller 35, can stably transport the board to the conveyor. After the cardboard is conveyed, the mounting arm 36 is reset under the action of the reset spring 37 to prepare for the next feeding.
Referring to fig. 4 and 5, in order to stabilize the paper placed on the feeding plate 20, a pressing block 60 is fixedly mounted on the feeding frame 19 through a spring rod 61, and the pressing block 60 is located below the spring rod 61 and suspended above the feeding plate 20. The pressing block 60 is provided with four blocks and corresponds to four corners of the feeding plate 20. When the cardboard is stacked on the upper plate 20, the pressing block 60 abuts on the upper end surface of the uppermost cardboard. So that the cardboards can be stacked on the upper material plate 20 more stably.
Referring to fig. 3 and 6, the discharging mechanism 3 includes a drive chain assembly 38 and a take-up assembly 39. The drive chain assembly 38 moves the die cut paperboard out to the lower platen 7 and onto the take-up assembly 39. The material collecting assembly 39 is used for collecting the die-cut paperboard.
Two drive chain assemblies 38 are arranged and are respectively positioned at two sides of the lower template 7. The drive chain assembly 38 includes a drive chain 40, a drive sprocket 41 for driving the drive chain 40 to rotate, and a fourth drive member 42 for driving the drive sprocket 41 to rotate. A drive plate 59 is provided on one link of the drive chain 40. The two driving chain wheels 41 are arranged along the discharging direction, and the driving chain is sleeved outside the two driving chain wheels 41. The fourth driving member 42 is a motor, and the fourth driving member 42 drives the driving sprocket 41 to rotate, so as to drive the driving chain 40 to rotate.
After the conveyer transports the paper board to the lower template 7, the driving chain 40 rotates until the driving plate 59 on the driving chain 40 abuts against the paper board, and the paper board is pushed to a preset position in front of each other. Thereby ensuring that the paperboard can be ready for die cutting. After the die cutting is finished, the driving chain 40 continues to rotate, and the driving plate 59 continues to push the paper board forwards, so that the paper board is pushed down from the lower template 7, and the discharging is finished.
Referring to fig. 7 and 8, the material receiving assembly 39 includes a material receiving frame 43, a material receiving plate 44 for placing the cardboard, and a fourth driving mechanism for driving the material receiving plate 44 to move in the vertical direction. The material receiving plate 44 is provided with a baffle plate 62 at an end remote from the drive chain assembly 38. The cardboard discharged from the lower template 7 falls onto the material collecting plate 44, and the fourth driving mechanism drives the material collecting plate 44 to move downwards, so that the uppermost cardboard placed on the material collecting plate 44 is always at the same height. The paperboard pushed from the lower template 7 can be stably stacked on the material receiving plate 44.
The fourth drive mechanism also comprises four drive chain sets 21. The four transmission chain groups 21 respectively correspond to four corners of the blanking plate. The drive chain set 21 includes a drive chain 26, a drive sprocket 27 and a motor. The two driving sprockets 27 are arranged along the vertical direction, and the driving chain 26 is sleeved outside the two driving sprockets 27. The motor drives one of the drive sprockets 27 to rotate. The blanking plate is fixedly connected to a link of the drive chain 26. The driving chain wheel 27 is driven by the motor to rotate, thereby driving the driving chain 26 to rotate. And then realize the drive to the blanking plate along vertical direction.
The implementation principle of the automatic die-cutting indenting machine in the embodiment of the application is as follows:
1. stacking the cardboards to be die-cut on the feeding plate 20;
2. the distance between the uppermost paperboard and the first sucking disk group 22 is kept constant through the first driving mechanism;
3. the first suction disc group 22 descends to suck one end of the uppermost paperboard, and then the first suction disc group 22 drives the paperboard to move upwards until the paperboard abuts against the second suction disc group 24;
4. the second suction cup group 24 sucks the paper board, the first suction cup group 22 cancels the suction force on the paper board, and then the second suction cup group 24 drives the paper board to move towards the conveyor until the paper board enters a gap between the driving roller group 18 and the conveyor;
5. the transmission of the conveyor and the driving of the driving roller group 18 are matched, so that the paper boards are smoothly fed onto the conveyor;
6. the conveyer drives the paper board to be conveyed forwards until the paper board moves onto the lower template 7;
7. the driving chain 40 rotates until the driving plate 59 on the driving chain 40 abuts against the paper board, and the paper board is pushed to a preset position in the front;
8. the third driving mechanism 9 drives the lower template 7 to move upwards to take the paperboard away from the driving chain 40, and the second driving mechanism 8 drives the upper template 6 to move downwards to enable the cutter component 5 to contact the paperboard, so that the die cutting of the paperboard is completed;
9. the lower template 7 moves downwards to place the paper boards on the driving chain 40, the driving chain 40 continues to rotate, the driving plate 59 continues to push the paper boards forwards, and the paper boards are pushed down from the lower template 7 and fall onto the material collecting plate 44;
10. the fourth driving mechanism drives the material receiving plate 44 to move downwards, so that the height of the uppermost paperboard on the material receiving plate 44 is always at the same height, and the paperboards pushed down from the lower template 7 can be stably blanked and stacked on the material receiving plate 44.
Example two:
the difference between the second embodiment and the first embodiment is that, referring to fig. 9 and 10, the cutter assembly 5 includes a cutter 45, a mounting seat 46, a connecting seat 47 and a sponge strip 48. Firstly, the sponge strips 48 are arranged on two sides of the cutting knife 45 through the matching of the connecting seat 47 and the mounting seat 46, and then the cutting knife 45 is arranged on the upper template 6. When the upper template 6 moves downwards, the sponge contacts the paperboard to press the paperboard, and then the upper template moves downwards continuously until the cutter 45 contacts the paperboard to perform die cutting on the paperboard. The sponge can play the role of pre-fixing and buffering, so that the paperboard can be better die-cut.
Specifically, referring to fig. 9, the cutting knife 45 is provided with a plurality of pieces, and the length of each piece of cutting knife 45 is the same as the side length of each side of the shape to be cut. The mounting seats 46 are fixedly mounted on the back of the cutter 45, and one mounting seat 46 corresponds to one cutter 45. The mounting seat 46 is used for mounting the cutter 45 to the side of the upper template 6 facing the lower template 7. The length of the mounting seat 46 is less than its corresponding cutter 45 length.
Referring to fig. 10, a receiving groove 49 is formed on the connecting seat 47, and the receiving groove 49 is disposed along the length direction of the connecting seat 47 and is communicated with end walls of two ends of the connecting seat 47. Coupling seat 47 is provided with a locking mechanism for fixing mounting seat 46 with respect to coupling seat 47. The locking mechanism comprises two stop bolts 50 threadedly connected to the connecting socket 47. Two limit bolts 50 are respectively located at two ends of the connecting seat 47 and cross the receiving slot 49.
When the cutter is installed, all the installation seats 46 are embedded in the accommodating grooves 49 and arranged in a straight line, and the cutters 45 are abutted to each other. And the mounting seat 46 abuts against the limit bolt 50 so as to be limited on the connecting seat 47. Two sponge strips 48 are arranged on the upper end surface of the mounting seat 46 in a bonding mode, and the two sponge strips 48 are respectively positioned on two sides of the cutting knife 45. After the step is finished, the mounting seat 46 is taken down from the connecting seat 47, the mounting seat 46 is sequentially mounted at each position of the upper template 6 according to the shape needing die cutting, the pattern of the cutter 45 which is the same as the shape needing die cutting is formed, and the operation is convenient and rapid.
Referring to fig. 11, in order to conveniently mount the mounting seat 46 on the upper mold plate 6, the upper mold plate 6 is a wood plate, and a groove 51 for embedding the mounting seat 46 is formed in the upper mold plate 6. The bottom surface of the groove 51 is provided with a screw hole 52. The mount 46 includes a mounting portion 55 to which the cutter blade 45 is connected, a first connecting portion 53, and a second connecting portion 54 for mounting with the upper die plate 6. The second connecting portion 54 is a screw, and the first connecting portion 53 is a plug rotatably connected to an upper end of the screw. The mounting portion 55 has a fitting groove 56 formed on a side thereof facing the plug, and the fitting groove 56 has a polygonal cross section. The plug-in connector is embedded in the embedding groove 56 and can slide relative to the embedding groove 56. The connector outer wall is equipped with joint arch 57, and joint arch 57 is equipped with a plurality of along connector circumference. The inner wall of the caulking groove 56 is provided with two clamping grooves 58 matched with the clamping protrusions 57, and the number of the clamping grooves 58 is two along the axial direction of the caulking groove 56.
When the installation base 46 is installed, the plug connectors can be inserted into the caulking grooves 56, the clamping protrusions 57 are embedded into the first clamping grooves 58, then the second connecting portions 54 are directly connected to the upper template 6 in a threaded mode, the plug connectors slide relative to the caulking grooves 56, and the clamping protrusions 57 are embedded into the other clamping caulking grooves 56. The mounting portion 55 is movable toward the upper platen 6 to be inserted into the groove 51, and at this time, the end surface of the entire sponge bar 48 abuts against the upper platen 6, thereby completing the mounting.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides an automatic die-cutting indentator, includes feed mechanism (1) and die-cutting mechanism (2), its characterized in that: the feeding mechanism (1) comprises a first feeding component (16) and a second feeding component (17), the first feeding assembly (16) comprises a feeding frame (19), a feeding plate (20) used for placing paperboards, a first driving mechanism used for driving the feeding plate (20) to move along the vertical direction, and a sucker mechanism used for sucking the paperboards on the feeding plate (20) and conveying the paperboards to the second feeding assembly (17), the second feeding assembly (17) comprises a conveyor for conveying the cardboard sheets onto the die-cutting mechanism (2), the sucker mechanism comprises a first sucker group (22), a second sucker group (24), a first driving piece (23) for driving the first sucker group (22) to move along the vertical direction, and a second driving piece (25) for driving the second sucker group (24) to move towards the conveyor, the second sucker group (24) is positioned on one side of the first sucker group (22) close to the conveyor.
2. An automatic die-cutting indentator as claimed in claim 1, characterized in that: the conveyer is close to first material loading subassembly (16) one end top and is equipped with drive roller set (18), drive roller set (18) are including installing drive roller frame (32) on the conveyer, rotate rotation axis (33) of connecting in drive roller frame (32), are used for drive axis of rotation (33) to rotate third driving piece (34), drive roller (35) of fixed mounting on axis of rotation (33), be equipped with the clearance between drive roller (35) and the conveyer.
3. An automatic die-cutting indentator as claimed in claim 2, characterized in that: first sucking disc group (22) include first sucking disc seat (28) and along conveyer width direction arrange in first sucking disc seat (28) a plurality of first sucking disc (29) of terminal surface down, second sucking disc group (24) include second sucking disc seat (30) and along conveyer width direction arrange in a plurality of second sucking disc (31) of terminal surface under second sucking disc seat (30), conveyer one end is kept away from to first sucking disc group (22) and second sucking disc group (24) all are located the cardboard.
4. An automatic die-cutting indentator as claimed in claim 3, characterized in that: the die-cutting mechanism (2) comprises a die-cutting frame (4), an upper template (6) provided with a cutter assembly (5), a lower template (7) and a second driving mechanism (8) used for driving the upper template (6) to move along the vertical direction, and the automatic die-cutting creasing machine further comprises a discharging mechanism (3) used for driving paper on the lower template (7) to discharge.
5. An automatic die-cutting indentator as claimed in claim 4, characterized in that: discharge mechanism (3) are equipped with two and are located lower bolster (7) both sides respectively including drive chain subassembly (38), drive chain subassembly (38) include drive chain (40), be used for drive chain (40) pivoted drive sprocket (41) and be used for drive sprocket (41) pivoted fourth driver (42), be equipped with drive plate (59) on at least one chain link of drive chain (40).
6. An automatic die-cutting indentator as claimed in claim 5, characterized in that: the die-cutting mechanism (2) further comprises a third driving mechanism (9) for driving the lower template (7) to move along the vertical direction.
7. An automatic die-cutting indentator as claimed in claim 4, characterized in that: the die cutting mechanism (2) comprises an upper template (6), a lower template (7) and a cutter assembly (5), the cutter assembly (5) comprises cutters (45), mounting seats (46), connecting seats (47) and sponge strips (48), the cutters (45) are provided with a plurality of pieces, the length of each piece of cutter (45) is the same as the length of each side of the shape to be cut, the mounting seats (46) are fixedly mounted on the cutters (45), one mounting seat (46) corresponds to one cutter (45), the mounting seats (46) are used for mounting the cutters (45) on one side of the upper template (6) facing the lower template (7), the length of the mounting seats (46) is smaller than that of the corresponding cutters (45), the connecting seats (47) are provided with accommodating grooves (49), all the accommodating seats are embedded in the accommodating grooves (49) and arranged in a straight line, and the connecting seats (47) are provided with locking mechanisms for fixing the mounting seats (46) relative to the connecting seats (47), the number of the sponge strips (48) is two, and the sponge strips are respectively stuck to two sides of the upper end face of each mounting seat (46).
8. An automatic die-cutting indentator as claimed in claim 7, characterized in that: cope match-plate pattern (6) are the plank, mount pad (46) include installation department (55) be connected with cutter (45), can dismantle first connecting portion (53) of being connected and be used for with second connecting portion (54) of cope match-plate pattern (6) installation through joint and installation department (55), second connecting portion (54) include the screw rod, be equipped with on cope match-plate pattern (6) be used for with screw rod complex screw (52).
9. An automatic die-cutting indentator as claimed in claim 8, characterized in that: the upper die plate (6) is provided with a groove (51) for embedding the mounting seat (46), and when the mounting seat (46) is embedded in the groove (51), the sponge is abutted to the upper die plate (6).
10. An automatic die-cutting indentator as claimed in claim 9, characterized in that: first connecting portion (53) include fixed connection in the plug connector of screw rod upper end, caulking groove (56) have been seted up towards plug connector one side in installation department (55), caulking groove (56) cross-section is the polygon, the plug connector inlays and locates in caulking groove (56) and caulking groove (56) slide relatively, the plug connector outer wall is equipped with joint arch (57), caulking groove (56) inner wall seted up with joint arch (57) complex joint recess (58), joint recess (58) are equipped with two along caulking groove (56) axial.
CN202110167386.5A 2021-02-07 2021-02-07 Automatic die-cutting indenting machine Pending CN112936984A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110167386.5A CN112936984A (en) 2021-02-07 2021-02-07 Automatic die-cutting indenting machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110167386.5A CN112936984A (en) 2021-02-07 2021-02-07 Automatic die-cutting indenting machine

Publications (1)

Publication Number Publication Date
CN112936984A true CN112936984A (en) 2021-06-11

Family

ID=76243059

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110167386.5A Pending CN112936984A (en) 2021-02-07 2021-02-07 Automatic die-cutting indenting machine

Country Status (1)

Country Link
CN (1) CN112936984A (en)

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03177239A (en) * 1989-12-02 1991-08-01 Canon Inc Sheet transporting device
US5547181A (en) * 1994-05-03 1996-08-20 Hewlett-Packard Company Media sheet pick and feed system
CN1350504A (en) * 1999-05-10 2002-05-22 Gbr***公司 Sheet feeding mechanism
CN1537799A (en) * 2003-04-15 2004-10-20 三星电子株式会社 Paper-feeding device of image forming equipment
JP2006055947A (en) * 2004-08-20 2006-03-02 O M Ltd Rotary die cutter
CN104368720A (en) * 2013-08-16 2015-02-25 江苏特威机床制造有限公司 Lateral discharging mechanism of bending machine
CN207058763U (en) * 2017-08-24 2018-03-02 雷天温斯顿电池(长泰)有限公司 A kind of Scissoring device of die-cutting machine
CN207120303U (en) * 2017-08-24 2018-03-20 雷天温斯顿电池(长泰)有限公司 A kind of cutting device of adjustable die-cutting machine
CN207140434U (en) * 2017-05-09 2018-03-27 浙江锐奇包装有限公司 A kind of cardboard paper feeder of packing box processing
CN108215319A (en) * 2018-02-28 2018-06-29 嘉兴市鸿业包装有限公司 A kind of overlay film paperboard form cuts process units
CN207874415U (en) * 2018-02-10 2018-09-18 东莞市超越光学制品有限公司 A kind of plastic cement lens barrel disassembling apparatus
CN108724333A (en) * 2018-07-19 2018-11-02 东莞市东电机械设备有限公司 A kind of full automatic high efficiency die-cutting machine
CN210256425U (en) * 2019-06-19 2020-04-07 滦州吉宏包装有限公司 Clear useless mechanism of cross cutting machine
CN210259872U (en) * 2019-08-10 2020-04-07 杭州朔骅包装有限公司 Intermittent type formula conveyer
CN210651068U (en) * 2019-05-08 2020-06-02 苏州领裕电子科技有限公司 Die cutting device with combined type hardware die
CN111851783A (en) * 2020-08-03 2020-10-30 深圳市润辰建设发展有限公司 Heat-insulating decorative wall and construction method thereof
CN212042389U (en) * 2020-03-20 2020-12-01 上海葛世工业自动化有限公司 Automatic discharging system for bending machine
CN212123579U (en) * 2020-04-22 2020-12-11 深圳市燕川光电有限公司 Die cutting mechanism of die cutting machine

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03177239A (en) * 1989-12-02 1991-08-01 Canon Inc Sheet transporting device
US5547181A (en) * 1994-05-03 1996-08-20 Hewlett-Packard Company Media sheet pick and feed system
CN1350504A (en) * 1999-05-10 2002-05-22 Gbr***公司 Sheet feeding mechanism
CN1537799A (en) * 2003-04-15 2004-10-20 三星电子株式会社 Paper-feeding device of image forming equipment
JP2006055947A (en) * 2004-08-20 2006-03-02 O M Ltd Rotary die cutter
CN104368720A (en) * 2013-08-16 2015-02-25 江苏特威机床制造有限公司 Lateral discharging mechanism of bending machine
CN207140434U (en) * 2017-05-09 2018-03-27 浙江锐奇包装有限公司 A kind of cardboard paper feeder of packing box processing
CN207120303U (en) * 2017-08-24 2018-03-20 雷天温斯顿电池(长泰)有限公司 A kind of cutting device of adjustable die-cutting machine
CN207058763U (en) * 2017-08-24 2018-03-02 雷天温斯顿电池(长泰)有限公司 A kind of Scissoring device of die-cutting machine
CN207874415U (en) * 2018-02-10 2018-09-18 东莞市超越光学制品有限公司 A kind of plastic cement lens barrel disassembling apparatus
CN108215319A (en) * 2018-02-28 2018-06-29 嘉兴市鸿业包装有限公司 A kind of overlay film paperboard form cuts process units
CN108724333A (en) * 2018-07-19 2018-11-02 东莞市东电机械设备有限公司 A kind of full automatic high efficiency die-cutting machine
CN210651068U (en) * 2019-05-08 2020-06-02 苏州领裕电子科技有限公司 Die cutting device with combined type hardware die
CN210256425U (en) * 2019-06-19 2020-04-07 滦州吉宏包装有限公司 Clear useless mechanism of cross cutting machine
CN210259872U (en) * 2019-08-10 2020-04-07 杭州朔骅包装有限公司 Intermittent type formula conveyer
CN212042389U (en) * 2020-03-20 2020-12-01 上海葛世工业自动化有限公司 Automatic discharging system for bending machine
CN212123579U (en) * 2020-04-22 2020-12-11 深圳市燕川光电有限公司 Die cutting mechanism of die cutting machine
CN111851783A (en) * 2020-08-03 2020-10-30 深圳市润辰建设发展有限公司 Heat-insulating decorative wall and construction method thereof

Similar Documents

Publication Publication Date Title
CN211363674U (en) Automatic paper feeding mechanism
CN108790273B (en) Paper dish forming machine
CN108746336B (en) Punching and bending device of automatic spring piece forming machine
CN109322216B (en) Pulp molding product side cut device
CN211616750U (en) Carton indentator convenient to material loading
CN112936984A (en) Automatic die-cutting indenting machine
CN111438262A (en) Automatic cutting machine
CN214266798U (en) Automatic rope threading mechanism for portable rope of packing box
CN214266778U (en) Automatic perforating device of packing box hand strap hole site
CN112454995B (en) Automatic assembling production system for handles of packing cases
CN210012329U (en) Stacking glass sheet material separating and positioning device
CN214354499U (en) Automatic reinforcing mechanism for portable rope hole of packing box
CN217428454U (en) Vertical and horizontal power supply piece assembling machine
CN219652188U (en) Automatic feeding mechanism of punching machine
CN214266797U (en) Automatic gluing mechanism for packaging box hand-held rope
CN216763783U (en) Stacking conveying device and die-cutting machine applying same
CN213170712U (en) Printing stock feeding mechanism of screen process press
CN220313482U (en) Die-cut device of antiseized stock form
CN214211362U (en) Packing box production automated inspection removing devices
CN110884212B (en) Packaging box forming machine
CN216599334U (en) Automatic press-riveting detection line for rotor core
CN220841621U (en) Feeding auxiliary platform for paperboard die cutting machine
CN214290367U (en) Automatic robot feeding and discharging stamping production line with double sliding rails
CN219968959U (en) Packaging box collet production line
CN213083622U (en) Paper bowl conveying system of noodle quantitative subpackaging device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210611

RJ01 Rejection of invention patent application after publication