CN113306197B

CN113306197B - Indentation method and indentation equipment for corrugated board

Info

Publication number: CN113306197B
Application number: CN202110633576.1A
Authority: CN
Inventors: 朱梁帅
Original assignee: Huai'an Forster Packaging Co ltd
Current assignee: Huai'an Forster Packaging Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2024-06-11
Anticipated expiration: 2041-06-07
Also published as: CN113306197A

Abstract

The invention provides an indentation method and indentation equipment of corrugated boards, wherein the indentation method comprises the following steps: transporting the corrugated boards one by one at a constant speed; the corrugated board is turned over from top to bottom, glue is distributed and film is coated on the film coating surface of the corrugated board in sequence in the turning over process, the corrugated board is turned over 180 degrees finally, and the film coating surface is turned over upwards to form an indentation surface; processing continuous indentation lines on the indentation surface of the corrugated board; stacking the paperboard after indentation. According to the invention, the compressive strength of the creasing part of the corrugated board is improved, the rapid creasing processing of the corrugated board is realized, the automation degree of the creasing equipment is higher, the corrugated board is not required to be carried frequently, the labor intensity is reduced, and the processing efficiency is improved.

Description

Indentation method and indentation equipment for corrugated board

Technical Field

The invention relates to the field of paperboard processing, in particular to an indentation method and indentation equipment for corrugated paperboard.

Background

The corrugated board can be folded into a corrugated carton by die-cutting the corrugated board and expanding the corrugated board into a predetermined shape, then pressing the corrugated board at a proper position of the corrugated board, and then turning the corrugated board along the pressed indentation line. At present, in the use process of the corrugated paper box, the situation that the crease of the corrugated paper board is damaged often occurs. The reason is that the indentation part of the corrugated board has lower strength and is easy to crush after being acted by the pressure of objects in the box for a long time. In order to solve the problem of insufficient strength of the creasing part of the corrugated board, it is considered to paste a strip film or paper at the corresponding position of the back of the creasing part of the corrugated board.

Patent application number 2018108863318 discloses a novel cardboard surface indentation device, pastes the scotch tape in corrugated container board's one side, and the another side carries out the indentation, can strengthen corrugated container board indentation position's compressive strength, but the device still has following not enough: (1) Only one corrugated board can be creased at a time, the processing efficiency is low, and the method is not suitable for creasing and processing of corrugated boards in batches; (2) The feeding and the discharging of the corrugated board are needed to be carried out manually, and the transparent adhesive tape is needed to be pulled to or separated from the corrugated board before and after indentation, so that the labor intensity is high, and the degree of automation is low.

Disclosure of Invention

The invention aims to provide an indentation method and indentation equipment for corrugated boards, which are used for improving the compressive strength of indentation parts of the corrugated boards and realizing rapid indentation processing of the corrugated boards.

The indentation method of the corrugated board provided by the invention comprises the following steps:

S1, paperboard feeding: transporting the corrugated boards one by one at a constant speed;

S2, conveying paper boards: the corrugated board is turned over from top to bottom, glue is distributed and film is coated on the film coating surface of the corrugated board in sequence in the turning over process, the corrugated board is turned over 180 degrees finally, and the film coating surface is turned over upwards to form an indentation surface;

S3, indentation of the paperboard: processing continuous indentation lines on the indentation surface of the corrugated board;

S4, stacking the paperboards: stacking the paperboard after indentation.

Preferably, the specific step S1 includes:

S11, bearing the paperboards stacked into a stack through the cross beam, and pushing the corrugated paperboards at the lowest layer of the stack out of the cross beam forwards in the transverse direction through the pushing block.

S12, enabling the pushing block to move backwards in the transverse direction, and resetting to an initial position after jacking up the material pile in the moving process.

Preferably, the specific step S2 includes:

S21, enabling corrugated boards to horizontally enter a board inlet formed by the conveying belt and the conveying roller.

S22, after the paper board enters the paper board inlet, the paper board is clamped by the conveying belt and the conveying roller and is attached to the curved surface of the conveying roller, and the paper board is turned downwards from top to bottom.

S23, in the process of overturning the corrugated board downwards, glue is spread on the film-covered surface of the corrugated board through a glue spreading device, and strip films or papers are adhered on the film-covered surface of the corrugated board through the film spreading device.

S24, the paperboard passes through the paperboard outlet, is turned upwards from the laminating surface to the indentation surface after being separated from the conveying roller, and is conveyed to the indentation station by the conveying belt.

Further, in S23, before the glue spreading device spreads glue on the film-covered surface of the corrugated board, the corrugated board is dedusted by the dedusting wheel.

The invention also provides indentation equipment of the corrugated board, which comprises a frame, a paper supply device, a conveying device, a gluing device, a laminating device and an indentation device, wherein the paper supply device, the conveying device, the gluing device, the laminating device and the indentation device are arranged on the frame; the paper feeding device is arranged at the top of the frame and is used for feeding out the corrugated boards one by one and feeding the corrugated boards onto the conveying device at a constant conveying speed; the conveying device is used for receiving the paper board conveyed by the paper feeding device, conveying the paper board to the indentation device and overturning the corrugated paper board by 180 degrees in the conveying process; the gluing device is positioned at the outer side of the conveying roller and is used for distributing glue on the corrugated board in the overturning movement process of the corrugated board; the film coating device is positioned below the gluing device and comprises a plurality of film coating mechanisms, and the film coating mechanisms correspond to the glue guns and are used for pasting strip films or paper on corrugated boards; the indentation device is arranged at the bottom of the frame and is used for processing indentation lines on the indentation surface of the corrugated board.

Further, the paper feeding device comprises a plurality of cross beams and a plurality of pushing blocks, corrugated boards in a material pile form are borne on the cross beams, and the pushing blocks are used for pushing out the corrugated boards at the lower layer of the material pile one by one; the cross beams extend transversely, a plurality of cross beams are distributed at intervals in the longitudinal direction, one side of each cross beam is provided with a fixed block, and stacked corrugated paper boards are propped against one side surface of each fixed block; the other side of the cross beam is provided with clamping plates which extend transversely, part of the clamping plates are positioned above the cross beam, and two adjacent clamping plates are matched with the cross beam to form a space for accommodating a corrugated board stock pile; the clamping plate is provided with a stop block, the stop block is positioned on the inner side of the clamping plate, and a gap is reserved between the stop block and the cross beam, and the gap can only allow one corrugated board to pass through.

Further, the pushing blocks are positioned between two matched cross beams, the pushing blocks are connected through a connecting rod, the connecting rod can transversely move along a conveying track, the conveying track transversely extends, and the pushing blocks are fixedly arranged at the bottoms of the cross beams; the pushing block is provided with a pushing surface and an arc surface, the pushing surface and the arc surface are both positioned above the cross beam, the pushing surface is positioned at the front end of the pushing block and is a plane which can be contacted with corrugated paper boards, and the arc surface is positioned at the rear end of the pushing block.

Further, the conveying device comprises a first paper supply belt, a conveying roller, a plurality of guide wheels and a plurality of conveying belts; the first paper feeding belt is positioned at the downstream of the paper feeding device, extends along the transverse direction and can receive corrugated boards separated from the cross beam; the conveying roller is positioned at the downstream of the first paper supply belt, extends longitudinally in the axial direction and is in transmission connection with the driving mechanism and is driven to rotate by the driving mechanism; the guide wheels are positioned outside the conveying roller, are staggered in the height direction and are longitudinally and alternately distributed, and the guide wheels positioned at different height positions are in transmission connection through a conveying belt; the corrugated board feeding device is characterized in that a gap for clamping corrugated boards is formed between the conveying belt and the conveying roller, a board inlet and a board outlet are formed in a matched mode, the board inlet is formed in the top of the conveying roller, and the board outlet is formed in the bottom of the conveying roller.

Further, the gluing device comprises a plurality of glue guns and a glue tank, wherein the glue guns are positioned on the outer side of the conveying belt and have a preset distance from the conveying roller; the glue gun is communicated with the glue tank and is provided with a nozzle which can be contacted with the corrugated board.

Further, the film coating device is positioned below the gluing device and comprises a plurality of film coating mechanisms, the film coating mechanisms correspond to the glue guns, and the film coating mechanisms comprise a material tray, an upper movable arm and a movable wheel; the upper telescopic cylinder, the cutting knife and the compression wheel; the material tray is rotationally connected to the frame, and a strip film or paper for laminating is wound around the periphery of the material tray; the upper end of the upper movable arm is hinged on the frame, and the lower end of the upper movable arm can be close to or far away from the conveying roller; the movable wheel is rotatably connected to the lower end of the upper movable arm, an arc-shaped clamping plate is further formed on the upper movable arm, and a channel for a strip-shaped film or paper to pass through is formed between the arc-shaped clamping plate and the movable wheel in a matched mode; the compression wheel is positioned below the movable wheel and can be close to or far away from the conveying roller; the cutting knife is positioned between the movable wheel and the pressing wheel and is used for cutting off the strip-shaped film or paper between the movable wheel and the pressing wheel.

Further, the conveying device further comprises a dust removing wheel, the dust removing wheel is located above the glue gun, a dust removing brush is arranged on the peripheral wall of the dust removing wheel, and the dust removing brush can be in contact with the film covering surface of the corrugated board.

According to the technical scheme, the invention has the advantages and positive effects that:

According to the invention, rapid creasing processing of corrugated boards is realized, the automation degree of the creasing equipment is higher, the corrugated boards are not required to be carried frequently, the labor intensity is reduced, and the processing efficiency is improved.

The strip-shaped film or paper is stuck on one surface of the corrugated board through the gluing device and the laminating device, and then an indentation is processed on the other surface of the corrugated board through the indentation device.

The corrugated board is conveyed by matching the conveying belt and the conveying roller, and is turned 180 degrees compared with the original state in the conveying process, so that the phenomenon of warping deformation of the corrugated board caused by long-time stacking can be avoided, and the quality of the corrugated board is guaranteed; on the other hand, in the conveying process, glue distribution and film coating processing can be respectively carried out at the corresponding positions of the corrugated board through the glue coating device and the film coating device, the process connection is smooth, and the processing efficiency is high; on the other hand, before the indentation device acts on the corrugated board, the movement guiding effect can be achieved on the corrugated board through the conveying belt and the conveying roller, the indentation link board is prevented from tilting or shifting in position, and the indentation processing effect is guaranteed.

Drawings

Fig. 1 is a schematic view of a paperboard indentation apparatus in accordance with an embodiment of the invention.

Fig. 2 is a schematic view of a paperboard indentation apparatus in accordance with another embodiment of the invention.

FIG. 3 is a schematic view of the structure of the conveying roller according to the present invention.

Fig. 4 is a schematic front view of the paper feeding device according to the present invention.

Fig. 5 is a schematic top view of the paper feeder of the present invention.

Fig. 6 is a schematic structural view of a portion of the second conveyor belt according to the present invention.

Fig. 7 is a schematic view of the structure of the portion of the conveying device in the present invention.

FIG. 8 is a schematic view of the structure of the part of the indentation apparatus of the present invention.

FIG. 9 is a schematic flow chart of the indentation method of the present invention.

The reference numerals are explained as follows: 101. corrugated board; 102. a cardboard inlet; 103. a paperboard outlet; 1. a conveying roller; 11. a roller shaft; 111. an air intake passage; 12. an air inlet nozzle; 13. a sleeve; 131. a connecting pipe; 132. a sleeve; 1321. an air outlet hole; 133. a second annular shoulder; 14. a sealing block; 141. a locking bolt; 142. a first annular shoulder; 15. an elastic tube; 16. sealing cover; 2. a paper feeding device; 21. a stop block; 22. a first paper supply tape; 23. a second paper supply tape; 231. a support; 232. a telescopic bracket; 233. a gear; 234. a lifting driving motor; 235. a rack; 236. a connecting piece; 237. a fixing part; 238. a movable part; 239. a spring; 24. a clamping plate; 25. a pushing block; 26. a fixed block; 27. a connecting rod; 29. a cross beam; 3. a conveying device; 31. a guide wheel; 32. a dust removal wheel; 33. a conveyor belt; 4. a gluing device; 41. a glue gun; 5. an indentation device; 51. a lower telescopic cylinder; 52. an indentation wheel; 53. a lower movable arm; 54. an indentation wheel shaft; 55. a pressure bearing wheel; 6. a stacking table; 7. a frame 7; 8. a film covering device; 81. a material tray; 82. an upper movable arm; 83. a movable wheel; 84. an upper telescopic cylinder; 85. a cutting knife; 86. and (5) a compression wheel.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the application, are intended to be within the scope of the claimed application based on embodiments of the present application.

Example 1

Referring to fig. 1 and 7, the paperboard indentation apparatus of the present embodiment is used to make one or more indentations in corrugated paperboard 101 (sheet). The paperboard indentation equipment in the embodiment comprises a frame 7, a paper feeding device 2, a conveying device 3, a gluing device 4, a laminating device 8 and an indentation device 5 which are arranged on the frame 7.

Referring to fig. 1, the paper feeding device 2 is mounted on top of the frame 7 for feeding out corrugated cardboards 101 one by one and feeding them onto the conveying device 3 at a constant conveying speed. Referring to fig. 4 and 5, the paper feeding device 2 includes a plurality of cross beams 29 and a plurality of pushing blocks 25, the cross beams 29 are loaded with corrugated boards 101 in a material pile form, and the pushing blocks 25 are used for pushing out the corrugated boards 101 in the lower layer of the material pile one by one.

For convenience of description about positional relationship, in the present embodiment, the horizontal conveyance direction of the corrugated board 101 is defined as the transverse direction, the horizontal direction perpendicular to the transverse direction is defined as the longitudinal direction, the face of the corrugated board on which the strip film or paper is stuck is defined as the lamination face, and the face of the corrugated board creasing line is defined as the creasing face.

The cross beams 29 extend transversely, a plurality of cross beams 29 are distributed at intervals in the longitudinal direction, one side of each cross beam 29 is provided with a fixed block 26, and stacked corrugated boards 101 are abutted against one side surface of each fixed block 26; the other side of the beam 29 is provided with clamping plates 24, the clamping plates 24 extend transversely, are partially positioned above the beam 29, and two adjacent clamping plates 24 and the beam 29 are matched to form a space for accommodating a stack of corrugated boards 101. When the pushing block 25 pushes the corrugated board 101, the clamping plate 24 can guide the corrugated board 101 to move so that the corrugated board 101 can move transversely on a preset track. The clamping plate 24 is provided with a stop block 21, and the stop block 21 is positioned on the inner side of the clamping plate 24 and has a gap with the cross beam 29, and the gap can only allow one corrugated board 101 to pass through.

The pushing blocks 25 are positioned between two cross beams 29 which are matched with each other, the pushing blocks 25 are connected through a connecting rod 27, the connecting rod 27 can transversely move along a conveying track, and the conveying track transversely extends and is fixedly arranged at the bottom of the cross beam 29; the pushing block 25 has a pushing surface and an arc surface, both of which are located above the beam 29, the pushing surface is located at the front end of the pushing block 25 and is a plane that can contact with corrugated board, and the arc surface is located at the rear end of the pushing block 25.

The connecting rod 27 is moved forward and laterally along the conveying track when the corrugated board 101 is supplied, and the pushing block 25 pushes the single corrugated board 101 at the lowest layer of the stack along the clamping plate 24 when the pushing surface of the pushing block 25 contacts the corrugated board 101. After the corrugated board 101 passes through the gap between the stop block 21 and the cross beam 29 and moves onto the conveying device 3, the connecting rod 27 moves backwards and transversely along the conveying track, after the arc surface of the pushing block 25 contacts with the corrugated board 101 at the lowest layer of the material stack, the pushing block 25 jacks up the corrugated board 101 and moves backwards continuously until the corrugated board moves to the initial position, and the feeding process of the single corrugated board 101 is completed at one time.

The conveying device 3 is used for receiving the paper board conveyed by the paper feeding device 2, then conveying the paper board onto the indentation device 5, and turning the corrugated paper board 101 180 degrees in the conveying process. Referring to fig. 1 and 7, conveyor 3 includes a first paper supply belt 22, a conveyor roller 1, a plurality of guide wheels 31, and a plurality of conveyor belts 33.

The first paper feeding strip 22 is located downstream of the cross member 29, extends in the lateral direction, and is capable of receiving corrugated board 101 after being separated from the cross member 29.

The conveying roller 1 is located below the cross beam 29 and downstream of the first paper feeding belt 22, and the conveying roller 1 extends longitudinally in the axial direction and is in transmission connection with a driving mechanism, and is driven to rotate by the driving mechanism.

The guide wheels 31 are located at the outer side of the conveying roller 1, are distributed in a staggered mode in the height direction, are distributed at intervals in the longitudinal direction, the guide wheels 31 located at different height positions are connected in a transmission mode through a conveying belt 33, and the conveying belt 33 adopts a ring-like belt and can rotate through the guide wheels 31. The conveying belt 33 is provided with a clamping part (in dynamic change) matched with the conveying roller 1 in shape, and a gap is formed between the clamping part and the conveying roller 1, so that the corrugated board 101 is clamped and driven to move along the curved surface of the conveying roller 1. A paperboard inlet 102 and a paperboard outlet 103 are also formed between the conveying belt 33 and the conveying roller 1 in a matched manner, the paperboard inlet 102 is positioned at the top of the conveying roller 1, and the paperboard outlet 103 is positioned at the bottom of the conveying roller 1; the corrugated board 101 separated from the paper feeding device 2 enters a gap between the conveying belt 33 and the conveying roller 1 through the board inlet 102, passes through the board outlet 103 and is completely separated from the conveying roller 1. Hereinafter, an operation of the conveying device 3 for conveying the corrugated cardboard 101 will be described.

After the paper board is pushed out by the pushing block 25, the paper board firstly breaks away from the cross beam 29 and moves onto the first paper feeding belt 22, the paper board is conveyed to the paper board inlet 102 by the first paper feeding belt 22, is clamped by the conveying belts 33 and the conveying rollers 1 when passing through the paper board inlet 102, moves downwards along the gap between the conveying belts 33 and the conveying rollers 1, gradually turns over in the moving process, turns over for 180 degrees right after passing through the paper board outlet 103, and moves continuously along the approximately horizontal part of the conveying belts 33 towards the direction approaching the indentation device 5.

Referring to fig. 1 and 7, the glue spreading device 4 is located at the outer side of the conveying roller 1, and is used for spreading glue on the corrugated board 101 during the overturning movement of the corrugated board 101. The glue application device 4 in this embodiment comprises a plurality of glue guns 41 and a glue tank (not shown).

The glue gun 41 is positioned outside the conveying belt 33 and is at a preset distance from the conveying roller 1; the glue gun 41 is in communication with the glue tank and has a nozzle capable of contacting the corrugated board 101; glue in the glue tank can be sprayed out through the nozzle, so that uniform glue distribution on the corrugated board 101 is realized.

Further, the conveying device 3 further comprises a dust removing wheel 32, the dust removing wheel 32 is located above the glue gun 41, a dust removing brush is mounted on the peripheral wall of the dust removing wheel, and the dust removing brush is used for removing impurities such as dust on the surface of the corrugated board before gluing and laminating, so that the laminating effect of the corrugated board and the strip-shaped film or paper is guaranteed.

The film coating device 8 is located below the glue coating device 4, and the film coating device 8 includes a plurality of film coating mechanisms, and a plurality of film coating mechanisms correspond to a plurality of glue guns 41, and are used for adhering strip films or papers on the corrugated board 101. Referring to fig. 7, the film laminating mechanism in the present embodiment includes a tray 81, an upper movable arm 82, a movable wheel 83, an upper telescopic cylinder 84, a cutter 85, and a pinch roller 86.

The tray 81 is rotatably connected to the frame 7, and has an axis extending in a longitudinal direction, and a strip film or paper for film coating is wound around the periphery.

The upper end of the upper movable arm 82 is hinged on the frame 7, and the lower end is in transmission connection with the movable end of the upper telescopic cylinder 84, so that the upper movable arm can be close to or far away from the conveying roller 1.

The movable wheel 83 is rotatably connected to the lower end of the upper movable arm 82, and the axis thereof extends longitudinally; the upper movable arm 82 is further formed with an arc-shaped clamping plate 24, and a channel for a strip-shaped film or paper to pass through is formed between the arc-shaped clamping plate 24 and the movable wheel 83 in a matching manner.

The pinch roller 86 is located below the movable roller 83, the pinch roller 86 rotates on a wheel seat (not labeled), and the wheel seat is connected with the movable end of the pinch telescopic cylinder, so that the pinch roller 86 can be close to or far away from the conveying roller 1.

The cutting knife 85 is located between the movable wheel 83 and the pressing wheel 86, connected with the movable end of the cutting telescopic cylinder, and used for cutting the strip-shaped film or paper between the movable wheel 83 and the pressing wheel 86.

Here, the operation of the glue applicator 4 and the film applicator 8 to manufacture the corrugated board 101 will be described.

In the process that the corrugated board 101 passes through the gluing device 4, the nozzle of the glue gun 41 sprays glue on the corrugated board 101; the upper telescopic cylinder 84 drives the upper movable arm 82 to move towards the direction approaching to the conveying roller 1, so that the strip-shaped film or paper outside the arc-shaped clamping plate 24 and the movable wheel 83 is contacted with the glue on the corrugated board 101, and the strip-shaped film or paper can be driven by the corrugated board 101 to move downwards; the gap between the pressing wheel 86 and the conveying roller 1 is adjusted by the pressing cylinder, so that the pressing wheel 86 presses the strip-shaped film or paper on the corrugated board 101. After a strip-shaped film or paper is covered on the corrugated board 101 for a preset length, stopping the movement of the conveying roller 1 and the conveying belt 33, driving the upper movable arm 82 to reset through the upper telescopic cylinder 84, tightening the strip-shaped film or paper between the movable wheel 83 and the pressing wheel 86, cutting the strip-shaped film or paper between the pressing wheel 86 and the movable wheel 83 through cutting the telescopic cylinder, resetting the pressing wheel 86, and moving the conveying roller 1 and the conveying belt again; after the corrugated board 101 with the film is coated passes through the board outlet 103 between the conveying roller 1 and the conveying belt 33, the strip film or paper is just positioned on the lower surface of the corrugated board 101, and is driven by the conveying belt 33 to be conveyed towards the direction approaching to the indentation device 5.

Referring again to fig. 7, the creasing device 5 is used for creasing the corrugated board 101 separated from the conveying roller 1, and creasing lines are formed on the upper surface, i.e. the creasing surface, of the corrugated board 101. The indentation device 5 comprises a plurality of indentation components, the plurality of indentation components are in one-to-one correspondence with the glue gun 41 and the film covering mechanism, and the indentation components comprise an indentation wheel 52, a lower movable arm 53, an indentation wheel shaft and a pressure-bearing wheel 55.

The pressure-bearing wheel 55 is rotatably connected to the frame 7 and is located between two adjacent conveyor belts 33, the highest point of the top of the pressure-bearing wheel is located below the upper surface of the conveyor belt 33 at the paperboard outlet 103, and a preset distance is formed between the two conveyor belts, and the preset distance is equivalent to the thickness of the strip-shaped film or paper. The pressing wheel 55 in this embodiment is used to match with the creasing wheel 52 to crease the corrugated board.

One end of the lower movable arm 53 is hinged on the frame 7, the other end is in transmission connection with the movable end of the lower telescopic cylinder 51, and the lower telescopic cylinder 51 drives the lower telescopic cylinder to approach or be far away from the pressure bearing wheel 55; the indentation wheel shaft is rotationally connected to the lower movable arm 53, the axis extends longitudinally, and the indentation wheel shaft is driven to rotate by an indentation motor; a plurality of creasing wheels 52 are mounted on the creasing-wheel axle at intervals above the pressure-bearing wheel 55.

The telescopic amount of the movable end of the lower telescopic cylinder 51 is controlled according to the thickness of the corrugated board 101 so as to adjust the distance between the creasing wheel 52 and the pressure-bearing wheel 55; the creasing wheel 52 is driven to rotate by a creasing motor, and the creasing wheel 52 is matched with the pressure-bearing wheel 55 to form a continuous creasing line on the corrugated board 101.

The corrugated cardboard 101 leaving the creasing device 5 will continue to move along the conveyor belt 33 for a distance and eventually be deposited onto the stacking table 6 where it is stacked in stacks.

The indentation equipment in this embodiment is firstly through gluing device 4 and tectorial membrane device 8 with strip film or paper paste on the surface of corrugated container board 101, and the rethread indentation device 5 is processed out the indentation at the other surface of corrugated container board 101, because with strip film or paper setting at the opposite face of indentation line, has promoted the compressive strength of corrugated container board 101 indentation position, prevents that the phenomenon of damage or crush appears in indentation position, helps prolonging corrugated container board's life, guarantees the result of use.

According to the invention, the corrugated board 101 is conveyed by the conveyer belt 33 and the conveyer roller 1, and the corrugated board 101 is turned 180 degrees compared with the original state in the conveying process, so that the phenomenon of warping deformation of the corrugated board 101 caused by long-time stacking can be avoided, and the quality of the corrugated board 101 can be ensured; on the other hand, in the conveying process, glue distribution and film coating processing can be respectively carried out at the corresponding positions of the corrugated board through the glue coating device and the film coating device, the process connection is smooth, and the processing efficiency is high; on the other hand, before the indentation device 5 acts on the corrugated board 101, the movement guiding effect can be achieved on the corrugated board 101 through the conveying belt 33 and the conveying roller 1, the indentation link board is prevented from tilting or shifting, and the indentation processing effect is guaranteed.

Example 2

Fig. 2 is a schematic structural view of a paperboard indentation apparatus of a modification, and the paperboard indentation apparatus shown in fig. 2 is suitable for paperboard indentation processing of different thicknesses. The difference from embodiment 1 is that the paperboard indentation apparatus in this embodiment adjusts the conveying device 3, and the structures of the paper feeding device 2, the glue spreading device 4, the film covering device 8 and the indentation device 5 are identical to those in embodiment 1, so that description is omitted here for the sake of brevity.

The conveying device 3 in this embodiment further includes a second paper supply belt 23, and a position adjusting mechanism for adjusting the height position of the second paper supply belt 23.

The second paper supply strip 23 is located between the first paper supply strip 22 and the transport cylinder 1 and is adjustable in height for receiving corrugated board 101 which is separated from the first paper supply strip 22.

Referring to fig. 6, the position adjusting mechanism in the present embodiment adjusts the position of the second paper feeding belt 23 in height by using a rack and pinion mechanism, and the height of the second paper feeding belt 23 is adjusted by the position adjusting mechanism according to the thickness of the corrugated board 101, so that the corrugated board 101 can be horizontally guided into the board entrance 102 formed between the conveyor belt 33 and the conveyor roller 1.

The position adjusting mechanism comprises a lifting driving motor 234, a support 231, a telescopic support 232 and a gear rack mechanism, wherein the support 231 is arranged on the telescopic support 232, a plurality of rotating rollers which are distributed along the transverse interval are rotationally connected on the support 231, the rotating rollers are rotationally connected through a second paper supply belt 23, the second paper supply belt 23 adopts an annular belt, and the rotating rollers rotate.

The rack and pinion mechanism includes a fixed portion 237, a movable portion 238, a gear 233, a rack 235, and a lift drive motor 234; the fixing part 237 is arranged on the frame 7, and the middle part is provided with a shaft hole in a penetrating way; one end of the movable part 238 is fixedly connected to the support 231, the other end of the movable part passes through the fixed part 237 through the shaft hole, and a spring 239 is arranged between the fixed part 237 and the movable part 238; the rack 235 is connected to the frame 7 in a vertically sliding manner, and is fixedly connected with the movable part 238 through the connecting piece 236, the gear 233 is rotatably connected to the frame 7 and is in meshed transmission with the rack 235, and the lifting driving motor 234 is in driving connection with the gear 233 and is used for driving the gear 233 to rotate.

The position adjusting mechanism drives the gear 233 to rotate through the lifting driving motor 234, the gear 233 rotates to drive the rack 235 to move in the height direction, and the moving direction of the rack 235 can be switched by changing the rotating direction of the gear 233, so that the rack 235 moves upwards or downwards. The support 231 connected to the rack 235 can be adjusted by controlling the rotation of the gear 233 by the elevation driving motor 234, thereby adjusting the distance between the first paper feeding belt 22 and the second paper feeding belt 23, so that the corrugated board 101 can be horizontally introduced into the gap between the conveyor belt 33 and the conveyor bowl 1 through the board entrance 102.

Of course, the position adjusting mechanism may adjust the position of the second paper feeding belt 23 in height by a transmission mechanism such as a worm gear or a ball screw, and the structure of the mechanism such as the worm gear or the ball screw is not illustrated in the present specification, but it should be noted that the above mechanisms are designed so that the corrugated board 101 can be horizontally guided into the board entrance 102 formed between the conveyor belt 33 and the conveyor roller 1. The worm and gear mechanism and the ball screw mechanism are both transmission structures, and specifically comprise a fixed part 237 and a movable part 238, the structures of the fixed part 237 and the movable part 238 are identical to those of a gear rack, and the details are not repeated here, and the difference is that the worm and gear mechanism adopts a rotating worm wheel to drive the movable part 238 to move upwards or downwards so as to adjust a support 231 connected with the movable part 238; the ball screw mechanism drives the movable portion 238 to move by using a screw nut that moves up and down, and can adjust the seat 231 connected to the movable portion 238.

Before the first corrugated cardboard sheet 101 enters the gap between the conveyor belt 33 and the conveyor roller 1 through the cardboard entrance 102, the gap between the conveyor belt 33 and the conveyor roller 1 needs to be adjusted according to the thickness of the corrugated cardboard sheet 101. The present embodiment adopts a method of adjusting the gap between the conveyor belt 33 and the conveyor roller 1 by changing the size of the conveyor roller 1, and the structure of the conveyor roller 1 in the present embodiment will be described next.

Referring to fig. 3, the transfer drum 1 includes a drum shaft 11, an air inlet nozzle 12, a sleeve 13, an elastic tube 15, and two sealing caps 16.

The roll shaft 11 has an air intake passage 111 open at one end, the air intake passage 111 extending in the longitudinal direction, the air intake passage 111 communicating with the air intake nozzle 12.

The sleeve 13 is sleeved on the periphery of the roller shaft 11 and is in a hollow tubular structure, an air flow channel is arranged in the sleeve 13, and the air flow channel is communicated with the air inlet channel 111 of the roller shaft 11 through a hollow connecting pipe 131; the peripheral walls of the sleeve 13 extend outwardly to form a second annular shoulder 133.

The elastic tube 15 is sleeved on the periphery of the sleeve 13 and is of a hollow tubular structure, the inner peripheral walls at two ends of the elastic tube 15 extend outwards to form a first annular groove, and the outer peripheral walls at two ends of the elastic tube 15 extend inwards to form a second annular groove.

The two sealing covers 16 are respectively sleeved on the second annular groove of the elastic tube 15, the sealing covers 16 are of a cylindrical structure with one end open, the middle part of each sealing cover is provided with a shaft hole for the roller shaft 11 to pass through in a penetrating manner, a sealing cavity is formed among the sealing covers 16, the elastic tube 15 and the sleeve 13, and the sealing block 14 is accommodated in the sealing cavity in a sealing manner; the sleeve 13 and the elastic tube 15 are matched to form an air chamber 132, an air outlet hole 1321 communicated with the air chamber 132 and the air flow channel is formed in the peripheral wall of the sleeve 13, and the air outlet hole 1321 is positioned between the two second annular shoulders 133;

The sealing block 14 is in a hollow tubular structure, a first annular shoulder 141 is formed outwards on the peripheral wall of the sealing block 14, and the first annular shoulder 141 is arranged in the first annular groove; the sealing cover 16, the sealing block 14 and the second annular shoulder 133 are positioned by a locking bolt 141, specifically, a threaded hole is formed in the second annular shoulder 133, the threaded hole does not penetrate through the second annular shoulder 133, and one end of the locking bolt 141 sequentially passes through the sealing cover 16 and the sealing block 14 and enters the threaded hole of the second annular shoulder 133.

Next, a mode of adjusting the size of the conveying roller 1 will be described.

Air is blown into the air inlet channel 111 of the roller shaft 11 through the air inlet nozzle 12, and the air sequentially passes through the air inlet channel 111, the connecting pipe 131, the air channel, the sleeve 13 and the air chamber 132 of the elastic pipe 15, and the elastic pipe 15 is expanded by air pressure. The air pressure in the air chamber 132 can be adjusted according to the thickness of the corrugated board 101, so that the expansion degree of the elastic tube 15 is adjusted, the conveying roller 1 and the conveying belt 33 are adapted to corrugated boards 101 with different thicknesses, the application range of the conveying device 3 is improved, and the size of the conveying roller 1 is controlled by adopting the air pressure, so that the adjustment is convenient and trouble is saved.

Through establish sleeve 13 at roller axle 11 periphery cover, locate sleeve 13 with elasticity pipe 15 cover again, compare in the mode that sleeve 13 was located to direct elasticity pipe 15 cover, reduced the size of the air chamber 132 that is used for adjusting elasticity pipe 15 expansion degree, it is more rapid to adjust elasticity pipe 15 expansion degree, also can reduce the consumption to the air supply.

The cooperation of elastic tube 15 and second annular shoulder 133 forms the first seal to air chamber 132, has carried out the second seal to air chamber 132 through the sealing block, has promoted the gas tightness to air chamber 132 through double seal, prevents to take place the deformation because of the air leakage in air chamber 132 leads to elastic tube 15, makes conveyor 3 to work steadily for a long time.

The outer surface of the corrugated board 101 entering the gap between the conveying belt 33 and the conveying roller 1 through the board inlet 102 is always in contact with the conveying belt 33 no matter how the thickness of the corrugated board 101 changes, so that the structure and the control mode of the gluing device 4 and the laminating device 8 do not need to be adjusted any more, and the control is simpler.

According to the thickness of the corrugated board 101, the clearance between the creasing wheel 52 and the pressure-bearing wheel 55 is controlled by adjusting the expansion and contraction amount of the movable end of the lower expansion cylinder 51 of the creasing device 5, so as to process the crease with a preset depth on the corrugated board 101.

Referring to fig. 9, the creasing method of the paperboard creasing apparatus of this embodiment includes the steps of:

S1, paperboard feeding: the corrugated cardboards are conveyed at a constant speed one by one.

S11, enabling the connecting rod to move forwards transversely along the conveying track, and when the pushing surface of the pushing block is contacted with the corrugated boards, the single corrugated board at the lowest layer of the material stack is pushed forwards along the clamping plate by the pushing block.

S12, enabling the connecting rod to transversely move backwards along the conveying track after the corrugated board passes through a gap between the stop block and the cross beam and moves on the first paper supply belt, and jacking the corrugated board by the pushing block after the arc surface of the pushing block is contacted with the corrugated board at the lowest layer of the material stack, and continuing to move backwards until the corrugated board moves to the initial position.

S2, conveying paper boards: and (3) turning the paper from top to bottom, sequentially carrying out glue spreading and film coating on the film coating surface of the corrugated board in the turning process, and finally turning the corrugated board 180 degrees from the film coating surface to the indentation surface (the corrugated board is upward before entering the board inlet, and upward when passing through the board outlet).

S21, conveying corrugated boards to the paper board inlet through the first paper supply belt, clamping by the conveying belts and the conveying rollers when the corrugated boards pass through the paper board inlet, moving downwards along a gap between the conveying belts and the conveying rollers, and gradually overturning in the moving process.

S22, when the corrugated board passes through the glue gun, the glue is sprayed on the corrugated board through the nozzle of the glue gun, and the upper telescopic cylinder drives the upper movable arm to move towards the direction close to the conveying roller, so that the arc-shaped clamping plate and the strip-shaped film or paper on the outer side of the movable wheel are in contact with the glue on the corrugated board, the film coating is realized, and the lower movable arm is driven by the corrugated board to move downwards.

S23, adjusting a gap between the compression wheel and the conveying roller through a compression cylinder to enable the compression wheel to compress the strip-shaped film or paper on the corrugated board; after the strip-shaped film or paper covers the corrugated board for a preset length, the conveying roller and the conveying belt are stopped moving, the upper movable arm is driven to reset through the upper telescopic cylinder, the strip-shaped film or paper is stretched between the movable wheel and the pressing wheel, the strip-shaped film or paper between the pressing wheel and the movable wheel is cut off through the cutting telescopic cylinder, the pressing wheel is reset, and the conveying roller and the conveying belt are moved again.

S24, after the corrugated board with the film is coated passes through the board outlet, the film coated surface of the corrugated board is downward, the indentation surface is upward, and the corrugated board is conveyed by the conveying belt to a direction close to the indentation device.

S3, indentation of the paperboard: a continuous embossing line is formed on the embossing surface of the corrugated board.

The creasing motor drives the creasing wheel to rotate, and the creasing wheel acts on corrugated boards on the conveyor belt in the rotating process, so that a section of continuous creasing lines are formed on the corrugated boards.

S4, stacking the paperboards: the corrugated board continues to move along the conveying belt for a certain distance after being separated from the indentation device, and is finally put on a stacking table, and is stacked on the stacking table to form a material stack.

While the application has been described in detail with reference to the examples, it will be apparent to those skilled in the art that the foregoing description of the preferred embodiments of the application may be modified or equivalents may be substituted for elements thereof, and that any modifications, equivalents, improvements or changes will fall within the spirit and principles of the application.

Claims

1. A method of creasing corrugated board, comprising the steps of:

s2, conveying paper boards: the corrugated board horizontally enters a board inlet formed by the conveying belt and the conveying roller, wherein before the first corrugated board enters a gap between the conveying belt and the conveying roller through the board inlet, the gap between the conveying belt and the conveying roller needs to be adjusted according to the thickness of the corrugated board; after entering the paperboard inlet, the paperboard is clamped by the conveying belt and the conveying roller and is attached to the curved surface of the conveying roller, and the paperboard is turned downwards from top to bottom; in the process of overturning the corrugated board downwards, glue is spread on the film-covered surface of the corrugated board through a glue spreading device, and a strip-shaped film or paper is stuck on the film-covered surface of the corrugated board through the film spreading device; the paperboard passes through the paperboard outlet, is turned upwards from the laminating surface to the indentation surface after being separated from the conveying roller, and is conveyed to the indentation station by the conveying belt; wherein:

The conveying roller comprises a roller shaft, an air inlet nozzle, a sleeve, an elastic tube and two sealing covers, wherein the roller shaft is provided with an air inlet channel with an opening at one end, the air inlet channel extends longitudinally, the air inlet channel is communicated with the air inlet nozzle, the sleeve is sleeved on the periphery of the roller shaft and is in a hollow tubular structure, an air flow channel is arranged in the sleeve, and the air flow channel is communicated with the air inlet channel of the roller shaft through a hollow connecting tube; the outer peripheral walls at two ends of the sleeve extend outwards to form a second annular shoulder, the elastic tube is sleeved on the outer periphery of the sleeve and is of a hollow tubular structure, the inner peripheral walls at two ends of the elastic tube extend outwards to form a first annular groove, the outer peripheral walls at two ends of the elastic tube extend inwards to form a second annular groove, two sealing covers are respectively sleeved on the second annular grooves of the elastic tube, each sealing cover is of a tubular structure with one open end, the middle part of each sealing cover is provided with a shaft hole for a roller shaft to pass through in a penetrating manner, a sealing cavity is formed among each sealing cover, each elastic tube and each sleeve, and sealing blocks are accommodated in the sealing cavities in a sealing manner; the sleeve and the elastic tube are matched to form an air chamber, an air outlet hole communicated with the air chamber and the air flow channel is formed in the peripheral wall of the sleeve, and the air outlet hole is positioned between the two second annular shoulders; the sealing block is of a hollow tubular structure, a first annular shoulder is formed outwards on the peripheral wall of the sealing block, and the first annular shoulder is arranged in the first annular groove;

S4, stacking the paperboards: stacking the paperboard after indentation.

2. The method for creasing corrugated board according to claim 1, wherein the specific step S1 includes:

S11, bearing paperboards stacked into a material pile through a cross beam, and pushing the corrugated paperboard at the lowest layer of the material pile out of the cross beam forwards in the transverse direction through a pushing block;

3. The method for creasing corrugated board according to claim 2, wherein the corrugated board is dedusted by a dedusting wheel before the glue coating device is used for coating the film-coated surface of the corrugated board.