CN114771022A

CN114771022A - Paperboard folding and creasing device and method

Info

Publication number: CN114771022A
Application number: CN202210377651.7A
Authority: CN
Inventors: 杨本纯; 周成喜; 杨辉民
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-07-22
Anticipated expiration: 2042-04-12
Also published as: CN114771022B

Abstract

The application relates to a paperboard folding and creasing device and method, which are applied to the field of corrugated paper packaging box production. The paper conveying plate of the conveying belt sequentially passes through the spraying mechanism and the indentation mechanism, the indentation mechanism comprises a rolling component and a pressing cutter component, the pressing cutter component is arranged on the rolling component, and the paper plate penetrates through the rolling component. This application has the folding effect more regular of department of cardboard behind the indentation.

Description

Paperboard folding and creasing device and method

Technical Field

The application relates to the field of corrugated paper packaging box production, in particular to a paperboard folding indentation device and method.

Background

Corrugated cartons are one of the common outer packages, and usually, corrugated cardboards are pre-printed with creases and then folded and formed along the creases according to a certain shape.

The method for producing the corrugated case generally adopts the mode of indentation to stamp out dents for folding on a corrugated board along folding positions, a cutter used for indentation exerts certain pressure on the corrugated board in the indentation process, the corrugated board is easy to crack and collapse and other phenomena are caused when the corrugated board is dry, and after the corrugated case is folded, the crease is not only unattractive, but also the corrugated case is easy to crack along the crease in the corrugated case folding forming process, thereby influencing the quality of the corrugated case finished product.

In the related technology, a spray head is generally used for spraying atomized water or steam water along the position of the crease, the crease is soaked and then is flatly pressed by a pressing plate, so that the surface of the paperboard is pressed with the crease, the paperboard near the crease is prevented from being brittle and cracking in the creasing process, and the quality of the finished corrugated carton is improved.

In view of the above-mentioned related art, the inventors found that the following drawbacks exist: the paperboard near the indentation still collapses after being pressed in the process of creasing by adopting flat pressing, so that the whole indentation inclines, and the product quality is influenced.

Disclosure of Invention

In order to solve the problem of irregular creasing, the application provides a paperboard folding creasing device and method.

In a first aspect, the application provides a cardboard folding indentation device, adopts the following technical scheme:

the utility model provides a creasing device is folded to cardboard, includes conveyer belt, spraying mechanism and indentation mechanism, conveyer belt conveying board passes through spraying mechanism and indentation mechanism in proper order, indentation mechanism includes rolling press subassembly and pressing knife subassembly, pressing knife subassembly is located on the rolling press subassembly, the cardboard passes the rolling press subassembly.

Through adopting above-mentioned technical scheme, spray through the position that spraying mechanism prepared the indentation on the cardboard before the indentation for the cardboard is moist can not appear that the indentation department collapses the condition of walking the shape at the in-process of follow-up indentation, and the folding department of cardboard after the indentation is more regular. Use the rolling component simultaneously, the cardboard is between the rolling component, along with the rotation of rolling component, indentation on the cardboard for the indentation is convenient more fast, and uses the rolled mode at the indentation in-process, is difficult to appear the phenomenon that the fracture sinks than the mode indentation department of concora crush, and the folding back quality of cardboard is better.

Optionally, the rolling assembly comprises a first compression roller and a second compression roller, the pressing cutter assembly comprises an indentation cutter and a cutter die, the indentation cutter is arranged on the outer wall of the first compression roller, the cutter die is arranged on the outer wall of the second compression roller, the indentation cutter is inserted into the cutter die, a cutter groove is formed in the cutter die, and the indentation cutter is inserted into the cutter groove.

Through adopting above-mentioned technical scheme, indentation sword on rolling assembly pushes in the sword inslot with the part that needs the extrusion crease on the cardboard when rolling assembly carries the cardboard forward and forms the crease, because the cardboard has absorbed water smoke and has become moist, can not be because too dry and the fracture at the in-process cardboard of extrusion crease, and the width and the degree of depth in sword groove are controllable, can select the sword groove of different specifications according to the thickness of different cardboard, and adaptability is wide.

Optionally, the spraying mechanism comprises a plurality of nozzles, the nozzles are communicated with a water source through a hose, and the nozzles spray water mist to wet the paperboard.

Through adopting above-mentioned technical scheme, spraying mechanism places before the rolling press subassembly, at first sprays when the conveyer belt is carried and wets, and the shower nozzle can preset in the top that the cardboard passes through the route, and the spraying can be moist with the cardboard that passes through like this, and convenient follow-up indentation operation that carries on, and the shower nozzle can directly spout vapor or atomized water, and water is vaporific suspension for treat that the cardboard of indentation can not absorb too much moisture and soft rot, the cardboard quality after the indentation is good.

Optionally, a pre-pressing mechanism is arranged between the spraying mechanism and the conveying belt, the pre-pressing mechanism comprises a first pre-pressing roller and a second pre-pressing roller, pre-pressing ridges are arranged on the first pre-pressing roller along the circumferential direction of the first pre-pressing roller, and the pre-pressing ridges abut against the paperboard.

Through adopting above-mentioned technical scheme, protruding stupefied through preliminary pressing, the shallow trace of impressing in advance before the spraying of spraying mechanism, send into spraying mechanism after the extrusion in, the water smoke that so adheres to on the cardboard surface can concentrate on the shallow trace because the existence of shallow trace, make the atomizing back again in the water that condenses can flow in the shallow trace on the cardboard like this, can not soak normal cardboard around, not only the cracked possibility of indentation department is little behind the cardboard indentation, and because atomized water is most concentrated on in the shallow trace, little to cardboard intensity influence on every side, folding behind the formation carton better quality.

Optionally, the shower nozzle is fixed on the pre-pressing convex arris, and the shower nozzle includes a plurality of nozzles, and is a plurality of the nozzle is evenly laid along the protruding stupefied length direction of pre-pressing on the pre-pressing convex arris, sets up the cavity in the first pre-pressing roller, and the nozzle communicates with the cavity, is equipped with the water inlet that is used for annotating water to the cavity on the first pre-pressing roller, is equipped with the valve of control water inlet break-make on the water inlet.

Through adopting above-mentioned technical scheme, spray water smoke through the nozzle promptly when the pre-compaction forms the shallow trace, soak shallow trace department, because the nozzle can be very accurate spray water smoke to shallow trace department on the protruding stupefied of pre-compaction, reduce the influence of water smoke to other parts of cardboard, still have fine intensity after the cardboard is folded.

Optionally, a pre-pressing groove is formed in the first pre-pressing roller along the circumference of the first pre-pressing roller, and a pressure spring is arranged between the pre-pressing groove and the pre-pressing ridge in the pre-pressing groove.

Through adopting above-mentioned technical scheme, protruding stupefied of pre-compaction can contract to the pre-compaction inslot when pressing on the cardboard, can control the protruding stupefied pressure of pre-compaction and press out the power way of shallow mark on the cardboard like this when actual compression, avoids cardboard fracture phenomenon to take place as far as possible.

Optionally, the notch department in pre-pressing groove is equipped with inward turn-ups, protruding stupefied the subsides of pre-pressing on the turn-ups, the tank bottom in pre-pressing groove is equipped with the water hole, the water hole passes through the pipeline and is connected with the water source, works as when protruding stupefied by pre-pressing is pushed down, water is followed protruding stupefied in pre-pressing with gap between the turn-ups oozes.

Through adopting above-mentioned technical scheme, water can be followed the protruding stupefied and the gap between the pre-compaction groove of pre-compaction oozes, the protruding stupefied surface of pre-compaction keeps moist state all the time at the protruding stupefied of pre-compaction in-process pre-compaction promptly, when the cardboard was through the protruding stupefied pre-compaction of pre-compaction, water can drip and can form continuous water mark in the shallow mark of the protruding stupefied below of pre-compaction, can carry out the indentation through the indentation sword after utilizing continuous water mark to soak the shallow mark, reduce the influence of water smoke to other parts of cardboard, still there is fine intensity after the cardboard is folding.

Optionally, a slope is arranged on one side of the turned edge, which is in contact with the pre-pressing convex edge, a sealing rubber gasket is arranged on the slope, and when the pre-pressing convex edge is in contact with the slope, the pre-pressing convex edge is abutted against the sealing rubber gasket.

Through adopting above-mentioned technical scheme, when the protruding stupefied butt of pre-compaction on domatic, sealed cushion plays sealed effect, with water-stop in the pre-compaction inslot, avoids water to ooze under the state of not using, the water economy resource.

Optionally, a plurality of guide grooves which are parallel to each other are arranged on the slope surface, the sealing rubber gasket is fixed at the bottoms of the guide grooves, guide ribs which are matched with the guide grooves are arranged on the pre-pressing ribs, and when the pre-pressing ribs abut against the slope surface, the guide ribs are inserted into the guide grooves.

By adopting the technical scheme, when the prepressing convex edge is extruded to shrink towards the inside of the prepressing groove, the prepressing convex edge is separated from the slope surface to form a gap, water seeps out of the gap, is guided by the guide groove and finally flows downwards along the prepressing convex edge, the pre-pressing convex edges are kept wet all the time in the pre-pressing process, shallow marks are pre-pressed on the surface of the paperboard along with the pre-pressing convex edges, because the surfaces of the convex ridges are wet, a continuous water band can be formed at the shallow marks, so that the shallow marks are simultaneously soaked in the prepressing process, in the subsequent indentation process, on one hand, the part wetted by the water band can be conveniently pressed to form the crease, on the other hand, the position on the paperboard without indentation can not be wetted by mistake, so that the structure of other positions of the paperboard can not be influenced, thereby ensuring the indentation quality and the strength of the folded paperboard, and ensuring the product quality.

In a second aspect, the application provides an indentation method of a paperboard folding and indentation device, which adopts the following technical scheme:

an indentation method of a paperboard folding indentation device comprises the following steps:

marking lines, namely marking positions needing to be pressed with creases on the surface of the paperboard;

a pre-pressing step, namely conveying the paperboard with the marked line into a pre-pressing mechanism through a conveying belt, pressing shallow marks through a pre-pressing convex edge, and spraying water mist at the shallow marks through a spray head while pressing the shallow marks, so that the water mist is gathered at the shallow marks to wet the shallow marks;

and an indentation step, namely feeding the paperboard subjected to the pre-pressing step into an indentation mechanism, and pressing the position of the shallow mark on the paperboard into the cutter groove through an indentation cutter to form a complete crease.

By adopting the technical scheme, the prepressing mechanism presses shallow marks on the paperboard along the mark position, the shallow mark position is enriched with water mist, so that only the position of the shallow mark is wetted, the shallow mark position is continuously rolled in the subsequent indentation step, at the moment, the shallow mark position is wetted, the paperboard at the indentation position is not easy to crack and collapse in the indentation process, meanwhile, only the crease position is wetted in the wetting process, the paperboard near the crease is not influenced, the strength of the paperboard near the crease is not influenced, and the product quality is ensured.

In summary, the present application includes at least one of the following benefits:

1. the positions of the paperboard prepared for the indentations are sprayed through the spraying mechanism before the indentations, so that the paperboard is wetted, the situation that the indentations collapse and go away in the subsequent indentation process cannot occur, and the folding positions of the paperboard after the indentations are more regular. And meanwhile, the rolling components are used, the paperboard is pressed on the paperboard along with the rotation of the rolling components, and the pressing is more rapid and convenient.

2. Through protruding stupefied in advance, the shallow trace of impressing in advance before the spraying of spraying mechanism, send into spraying mechanism after the extrusion in, the water smoke that adheres to on cardboard surface like this can concentrate in the shallow trace owing to the existence of shallow trace, make after the atomizing again in the shallow trace can be flowed into to the water that condenses on the cardboard, can not soak normal cardboard around, not only the cracked possibility of indentation department is little behind the cardboard indentation, and because the atomized water is mostly concentrated in the shallow trace, little to cardboard intensity influence on every side, folding behind the formation carton of quality is better.

3. The nozzle and the pre-compaction groove intercommunication of setting on protruding stupefied of pre-compaction, pre-compaction groove and cavity intercommunication, can outwards spray water through the nozzle that sets up on protruding stupefied of pre-compaction when first pre-compaction roller pre-compaction, make protruding stupefied of pre-compaction keep moist state, thereby make the shallow trace of extrusion also be in moist state, need not set up independent spraying mechanism when having simplified the device structure, avoid independent spraying mechanism not need moist cardboard around moist, avoid other parts of cardboard to return the phenomenon that soft causes cardboard structural strength to diminish.

4. Water oozes from the gap of the prepressing convex edge and the prepressing groove, the prepressing convex edge is wet, the prepressing convex edge is always in a wet state in the whole prepressing process, the prepressing shallow mark surface has water, the prepressing shallow mark part is wetted, the prepressing shallow mark part can be wetted when the prepressing shallow mark is pressed, the indentation efficiency is accelerated, meanwhile, the paperboard beyond the shallow mark can not be wetted, and therefore the strength of the folded paperboard can not be influenced.

Drawings

FIG. 1 is a schematic view of a first embodiment of a creasing device for a sheet of paper according to the present application;

fig. 2 is a schematic view of the internal structure of a first embodiment of a creasing device for cardboard folds according to the present application;

FIG. 3 is a schematic view of the internal structure of the creasing mechanism of the first embodiment of the creasing device for cardboard folds according to the present application;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

fig. 5 is a schematic structural view of a spraying mechanism of a first embodiment of a paperboard folding and creasing device in the present application;

FIG. 6 is a schematic diagram of a second embodiment of a spraying mechanism of the first embodiment of the paperboard folding and creasing device of the present application;

FIG. 7 is a schematic view of the nozzle structure of the spraying mechanism of the first embodiment of the creasing device for cardboard sheets in the present application;

FIG. 8 is a schematic view of a second embodiment of a creasing device for a sheet of paper according to the present application;

FIG. 9 is a schematic diagram of a first embodiment of a prepressing mechanism of a second embodiment of a creasing device for folding a sheet of paper according to the present application;

FIG. 10 is a schematic view of the internal structure of a first embodiment of a prepressing mechanism of a second embodiment of a creasing device for folding a sheet of paper according to the present application;

FIG. 11 is an enlarged view of the structure at B in FIG. 10;

FIG. 12 is a schematic diagram of a second embodiment of a pre-press mechanism of a second embodiment of a creasing device for folding cardboard sheets according to the present application;

FIG. 13 is a schematic view of the internal structure of a second embodiment of the prepressing mechanism of a second embodiment of a creasing device for folding a sheet of paper according to the present application;

FIG. 14 is an enlarged view of the structure of FIG. 13 at C;

FIG. 15 is a schematic view of a third embodiment of a creasing device for a sheet of paper of the present application;

FIG. 16 is a schematic diagram of a first embodiment of a prepressing mechanism of a third embodiment of a creasing device for sheet folding according to the present application;

FIG. 17 is a schematic view of the internal structure of a first embodiment of a pre-press mechanism of a third embodiment of a creasing device for folding cardboard in accordance with the present application;

FIG. 18 is an enlarged view of the structure of FIG. 17 at D;

FIG. 19 is a schematic diagram of a second embodiment of a prepressing mechanism of a third embodiment of a creasing device for sheet folding according to the present application;

FIG. 20 is a schematic view of the internal structure of a second embodiment of a pre-press mechanism of a third embodiment of a creasing device for folding cardboard according to the present application;

FIG. 21 is an enlarged view of E in FIG. 20;

FIG. 22 is a schematic construction view of a third embodiment of a prepressing mechanism of a third embodiment of a creasing device for sheet folding according to the present application;

FIG. 23 is a schematic view of the internal structure of a third embodiment of a pre-press mechanism of a third embodiment of a creasing device for folding cardboard according to the present application;

FIG. 24 is an enlarged view of the structure at F in FIG. 23;

in the figure: 1. a conveyor belt; 2. a paperboard; 3. a spraying mechanism; 31. a spray head; 32. a pipeline; 33. a high-pressure air nozzle; 4. an indentation mechanism; 41. a rolling assembly; 411. a first press roll; 412. a second press roll; 42. a press blade assembly; 421. an indentation knife; 422. cutting the die; 5. a pre-pressing mechanism; 51. a first pre-press roll; 511. a cavity; 52. a second pre-press roll; 53. pre-pressing convex edges; 54. pre-pressing a groove; 541. a water pore; 542. flanging; 55. a pressure spring; 56. and (4) a slot.

Detailed Description

The present application is described in further detail below with reference to figures 1-24.

The embodiment of the application discloses 2 folding indentation devices on cardboard. Referring to fig. 1, a plurality of layers of paper boards 2 are stacked on a conveyor belt 1, positions on the paper boards 2 to be folded are marked by lines in advance, one paper board 2 is conveyed forwards to a spraying mechanism 3 through the conveyor belt 1 to be sprayed each time, a spray head 31 of the spraying mechanism 3 sprays and wets the mark positions on the paper boards 2 along the marks, then the paper boards are conveyed into an indentation mechanism 4, an indentation mechanism 4 carries out indentation along the mark positions, the mark positions on the paper boards 2 are wetted before indentation, and therefore the indentation positions of the paper boards 2 cannot be cracked and collapsed during indentation.

Referring to fig. 2 and 3, the creasing mechanism 4 includes a rolling assembly 41 and a pressing knife assembly 42, the pressing knife assembly 42 can be directly fixed on the rolling assembly, the sprayed paper board 2 can be conveyed forward by the rolling assembly while being capable of being creased by the pressing knife assembly 42 along a reserved mark in the conveying process, and the creasing position is wetted by water in advance, so that the phenomenon of cracking and collapsing of the surrounding paper board 2 due to drying of the creasing position in the creasing process can be avoided.

Referring to fig. 3 and 4, the rolling assembly includes a first pressing roller 411 and a second pressing roller 412, the pressing blade assembly 42 includes an indentation knife 421 and a cutting die 422, the cutting die 422 is fixed on the second pressing roller 412, the indentation knife 421 is fixed on the first pressing roller 411, the first pressing roller 411 and the second pressing roller 412 are mutually attached to the surface of the indentation knife 421 protruding out of the first pressing roller 411, and the indentation knife 421 is inserted into a knife slot formed on the cutting die 422 along with the rotation of the first pressing roller 411. When in creasing, the paper board 2 is between the first pressing roller 411 and the second pressing roller 412, and the position needing creasing is above the knife slot, along with the relative rotation of the first pressing roller 411 and the second pressing roller 412, the paper board 2 moves forwards, and simultaneously the creasing knife 421 presses the part needing creasing of the paper board 2 into the knife slot to form creasing, and the creasing position of the paper board 2 before creasing is subjected to spray wetting treatment, so that the creasing position of the paper board 2 is not cracked because the creasing position of the paper board 2 is too dry. And because the cardboard 2 is clamped by the first pressing roller 411 and the second pressing roller 412, the clamping force is uniform, the phenomenon that the cardboard 2 collapses due to nonuniform local pressure is avoided, the quality of the cardboard 2 after indentation is good, and the strength of the cardboard 2 after folding along the indentation is basically not influenced. In the actual indentation process, different sizes can be selected according to different thicknesses of the paper boards 2, the width of the cutter grooves and the depth of the cutter grooves, the width of the cutter grooves is too large when the cutter grooves are too large, the indentations are prone to being inclined when the paper boards are folded, and the paper boards 2 are prone to being broken when the cutter grooves are too large in depth, so that the paper boards 2 are broken from the indentations. Therefore, the width of the cutter grooves can be selected to be 4mm-6mm, and the depth of the cutter grooves can be selected to be 0.6mm-1.2mm, so that the press marks can be pressed on the paper board 2 in the pressing process, the press marks can not influence the strength of the paper board 2, and the strength of the paper board 2 after the pressing marks is almost not influenced.

Referring to fig. 4, the knife slot opening of the cutting die 422 may be set to be an arc surface, that is, the knife slot opening is chamfered, so that the edge of the knife slot opening is smoother, the smoother knife slot can avoid damage to the surface of the paper board 2 as much as possible during the indentation process, and the quality of the whole paper board 2 after indentation cannot be affected.

Referring to fig. 2 and 5, the spraying mechanism 3 comprises a plurality of spray heads 31, nozzles of the spray heads 31 face the paper boards 2, a single paper board is directly conveyed by a conveying belt to enter the lower portion of the spray heads, the nozzles of the spray heads directly spray water to the surface layers of the paper boards, the spray heads 31 are communicated with a water source through pipelines 32, when the paper boards 2 pass through, steam water is sprayed or sprayed on the paper boards 2 to wet the paper boards 2, so that the phenomenon that the paper boards 2 are too dry when being indented is avoided, and the cracking phenomenon in the indentation process of the paper boards 2 is reduced.

Referring to fig. 6 and 7, another embodiment of the spraying mechanism 3 is shown, the spraying mechanism 3 still comprises a plurality of spraying heads 31, when the paper boards 2 are stacked on the conveying belt 1, the nozzles of the spraying heads 31 can be directed towards the paper boards 2, the sprayed water vapor is parallel to the conveying belt 1, the water vapor is directly sprayed to the middle corrugations of the paper boards 2 in the spraying process, so that the spraying can only wet the middle corrugations of the paper boards 2, the surface layer of the paper boards 2 can hardly absorb the water vapor, when the paper boards are conveyed to the creasing mechanism 4 for creasing, the surface layer of the paper boards 2 is dry compared with the middle corrugations of the paper boards 2, the paper boards 2 can hardly be crushed due to the water absorption of the surface layer of the paper boards 2 in the creasing process, and the creasing quality is better. Be equipped with high-pressure air cock 33 in the both sides of the nozzle of shower nozzle 31, high-pressure air cock 33 outwards sprays high-pressure gas, form the air wall, when the nozzle of shower nozzle 31 outwards sprays steam, the air wall can play spacing effect to the injection route of steam, avoid the phenomenon that diffusion appears in steam, because the limiting displacement of air wall, can not cause the influence to other parts of cardboard 2 at the steam injection in-process, avoid the phenomenon of the structural strength step-down that other parts softly returned and cause.

Because the coverage of the water mist sprayed by the spraying mechanism 3 is large, other parts of the paper board 2 sprayed by the spraying mechanism 3 can absorb the water mist to cause the phenomenon that the paper board 2 is softened. In order to avoid the other parts of the paper board 2 from absorbing water mist and softening, referring to fig. 8 and 9, a pre-pressing mechanism 5 can be arranged between the spraying mechanism 3 and the conveying belt 1, the pre-pressing mechanism 5 pre-presses shallow marks at the positions needing the marks in advance, then sends the paper board 2 into the spraying mechanism 3 for spraying, thus, water drops formed by attaching the water mist to the paper board 2 flow towards the shallow marks and are finally gathered in the shallow marks, so that only the positions of the shallow marks are soaked, the influence on other parts of the paper board 2 is small, the other parts of the paper board 2 hardly soften, and the softening occurs only at the position of the shallow mark, namely the position of the indentation formed by the subsequent indentation operation, can carry out accurate soaking to indentation position promptly, can not influence cardboard 2 on every side, avoid 2 other parts of cardboard to go back soft phenomenon that causes 2 structural strength of cardboard to step down. The produced paper board 2 has almost no change in strength after being folded and good product quality.

Referring to fig. 10 and 11, a first embodiment of the pre-pressing mechanism 5 is shown. The prepressing mechanism 5 comprises a first prepressing roller 51 and a second prepressing roller 52, a prepressing convex ridge 53 is fixed on the first prepressing roller 51 along the circumferential direction of the first prepressing roller 51, the second prepressing roller 52 rotates relative to the first prepressing roller 51, the prepressing convex ridge 53 presses out a concave shallow mark along the marked position along with the rotation of the first prepressing roller 51 through the prepressing convex ridge 53, and when subsequent spraying is wet, water drops condensed by water mist can gather in the shallow mark and wet the position of the shallow mark, so that the position where only the shallow mark is located is soft, namely the position where the shallow mark is located in subsequent indentation operation, namely the position where the indentation is located, namely, the position where the indentation is located can be accurately wetted, other parts cannot be affected, and the phenomenon that the structural strength of a product is reduced due to the fact that other parts are soft is avoided.

Referring to fig. 12 and 13, a second embodiment of the pre-pressing mechanism 5 is shown. A pre-pressing groove 54 may also be provided on the first pre-pressing roller 51, and the pre-pressing ridge 53 is placed in the pre-pressing groove 54.

Referring to fig. 13 and 14, a compression spring 55 may be provided between the pre-pressing groove 54 and the pre-pressing ridge 53. The prepressing convex edges 53 can stretch out and draw back in the depth direction of the prepressing grooves 54 in a reciprocating mode in the prepressing grooves 54, so that in the prepressing process, the pressure given by the prepressing convex edges 53 is softer, the depth of shallow marks formed in the prepressing process is smaller, and the product cannot be damaged due to the fact that the prepressing degree is larger. The second pre-press roll 52 may be a smooth roll, and when the second pre-press roll 52 is a smooth roll, the sheet 2 is attached to the outer wall of the second pre-press roll 52.

Referring to fig. 14, the second prepressing roll 52 may be provided with an insertion groove 56 into which the prepressing bead 53 is inserted, and when the first prepressing roll 51 and the second prepressing roll 52 rotate relatively, the prepressing bead 53 is inserted into the insertion groove 56, and the prepressing bead 53 is pressed into the insertion groove 56, thereby forming a shallow mark at the position of the mark line.

Referring to fig. 15, the spraying head 31 of the spraying mechanism 3 may also be directly arranged on the pre-pressing ridge 53, the nozzle of the spraying head 31 is directly arranged on the pre-pressing ridge 53 and faces the direction of the paperboard 2, and the spraying head 31 is still communicated with the water source through a hose. Thus, the specific spraying mechanism 3 can be omitted, the volume of the whole device is reduced, and the structure of the whole device is simplified.

Referring to fig. 16 and 17, based on the first embodiment of the prepressing mechanism 5, specifically, a cavity 511 may be provided in the entire first prepressing roller 51, a nozzle may be provided on the prepressing ridge 53 and communicated with the cavity 511, and when the first prepressing roller 51 stops rolling, water may be added to the cavity 511 through a hose connected to the cavity 511.

Referring to fig. 17 and 18, more specifically, a water inlet is formed in the side wall of the first pre-pressing roller 51, a check valve is arranged at the water inlet, when the rolling is stopped, a hose can be used to connect the water inlet to replenish water into the cavity 511, and after the water replenishing is completed, the check valve can prevent water from flowing out of the water inlet. The check valve also can be replaced by ordinary valve, opens the valve promptly and carries out the water injection through the hose when needing the water injection, closes the valve promptly when not needing the water injection, seals the water inlet. Along with the rolling of first pre-pressing roller 51, the ability of the water in cavity 511 flows out from the nozzle that sets up on pre-pressing protruding stupefied 53, moistens the pre-pressing roller, like this, only can moisten the position of shallow mark in whole moist process, and it is more accurate to moisten, can carry out accurate soaking to the position of indentation promptly, can not exert an influence to other positions, avoids the phenomenon that other parts of product get back soft and cause overall structure intensity to diminish.

Referring to fig. 19 and 20, on the basis of the second embodiment of the prepressing mechanism 5, i.e. the prepressing grooves 54 on the first prepressing roll 51 remain, and the prepressing ridges 53 still move in the prepressing grooves 54.

Referring to fig. 20 and 21, the nozzle is communicated with the pre-pressing groove 54, a water hole 541 is formed at the bottom of the pre-pressing groove 54, a cavity 511 is still required to be formed in the first pre-pressing roller 51, and the cavity 511 is used for storing water. The water hole 541 may directly communicate with the cavity 511. The prepressing groove 54 can be communicated with the cavity 511 through the water holes 541, water flows into the prepressing groove 54 from the cavity 511 through the water holes 541 while the first prepressing roller 51 performs prepressing, and finally water is leaked outwards through the nozzles on the prepressing ridges 53, so that the prepressing ridges 53 are kept in a wet state, the pressed shallow marks are also in a wet state, and an independent spraying mechanism 3 is not required. When having simplified the device structure, avoid independent spraying mechanism 3 moist not need moist part around, avoid the phenomenon that the structural strength step-down that other parts of product caused of softening.

Fig. 22 and 23 are views showing a second embodiment of the pre-pressing mechanism 5. I.e. the pre-pressing grooves 54 of the first pre-pressing roll 51 remain, the pre-pressing ridges 53 still move in the pre-pressing grooves 54.

Referring to fig. 23 and 24, specifically, a water hole 541 needs to be provided at the bottom of the pre-pressing groove 54, and a cavity 511 needs to be provided in the first pre-pressing roller 51, and the cavity 511 is used for storing water. The water hole 541 may directly communicate with the cavity 511. When the pre-pressing convex edge 53 is not pressed down, the pre-pressing convex edge 53 is tightly abutted to the notch of the pre-pressing groove 54 by the pressure spring 55 to seal the pre-pressing groove 54, water flows into the pre-pressing groove 54 from the water hole 541, the pre-pressing convex edge 53 is sealed in the pre-pressing groove 54, when the pre-pressing convex edge 53 is pressed down, gap water exists between the pre-pressing convex edge 53 and the pre-pressing groove 54, namely seeps out from the gap and flows to the pre-pressing convex edge 53, so that the pre-pressing convex edge 53 is always in a wet state in the pre-pressing process, and a wet shallow mark is pre-pressed on the paperboard 2 along with the pre-pressing convex edge 53 in the pre-pressing step, namely, the wet operation can be simultaneously performed in the pre-pressing process. On the one hand, the position of shallow mark only can be moistened to the pre-compaction in-process, and other parts to the product influence still less, can carry out accurate soaking to indentation place position promptly, can not exert an influence to around, avoid other parts to go back soft and cause the phenomenon that structural strength diminishes. On the other hand, the spraying mechanism 3 does not need to be additionally arranged, the size of the whole device is small, and the structure is simpler.

Referring to fig. 24, in order to enhance the sealing effect between the pre-pressing rib 53 and the pre-pressing groove 54, an inward flange 542 may be disposed at the notch of the pre-pressing groove 54, the pre-pressing rib 53 abuts against the flange 542 under the action of a pressure spring 55, a sealing rubber gasket may be fixed on a side of the flange 542 contacting the pre-pressing rib 53, the pre-pressing rib 53 may abut against the sealing rubber gasket when not operating by the pressure of the pressure spring 55 on the pre-pressing rib 53 to form a seal, and the pre-pressing ridge 53 is pressed down toward the groove bottom of the pre-pressing groove 54 when the pre-pressing ridge 53 is operated, a gap is formed between the pre-pressing edge 53 and the flanging 542, water seeps out from the gap, so that the pre-pressing edge 53 can be always kept wet when the pre-pressing edge 53 works, the influence on the periphery is less, can carry out accurate soaking to the indentation position promptly, can not exert an influence to other parts, avoid the phenomenon of the structural strength step-down that other parts soft-back caused.

Referring to fig. 24, one side of turn-ups 542 and the protruding stupefied 53 contact of pre-compaction can be set to domaticly for protruding stupefied 53 of pre-compaction is bigger with the contact surface of turn-ups 542, fixes sealed cushion equally on domatic, sets up domatic scope that makes sealed cushion bigger, and bigger with the protruding stupefied 53 contact surface of pre-compaction between, it is sealed more firm. Can also set up the guiding gutter that is used for the water conservancy diversion on domatic, can flow to protruding stupefied along the water conservancy diversion direction flow direction of guiding gutter when water flows out in the gap of sealed protruding stupefied and turn-ups 542, make water can flow to protruding stupefied 53 of preliminary pressing more accurately, can avoid the water waste on the one hand, on the other hand can reduce the direct possibility of drippage of water on cardboard 2 as far as possible, avoid other parts by the mistake moist and lead to appearing the phenomenon of softening back, make do not need moist place to keep dry, structural strength after folding is better. The corresponding position on pre-pressing convex arris 53 sets up the protruding arris of water conservancy diversion and guiding gutter adaptation, every guiding gutter corresponds to insert a water conservancy diversion convex arris in sealed time, when pre-pressing convex arris 53 shrink, the protruding arris of water conservancy diversion moves to the direction of keeping away from the guiding gutter, but can not break away from the guiding gutter completely, this kind of state offal can flow along the guiding gutter and because the protruding stupefied effect water of water conservancy diversion can flow wet the protruding arris 53 of pre-pressing on the protruding arris 53 of pre-pressing along the protruding arris of water conservancy diversion directly, make hydroenergy flow to the protruding arris 53 of pre-pressing more accurately, can avoid water waste on the one hand, on the other hand can reduce the possibility that water directly drips on cardboard 2 as far as possible, avoid the phenomenon of softening that other parts are wet by mistake and lead to, make wherein do not need the moist place to keep dry, the structural strength of folding back product is better.

This application need treat the cardboard 2 of indentation at first at the in-process of 2 indentures of cardboard and carry out the setting-out operation, and the position that needs the indentation on the cardboard 2 utilizes the lines to mark. After marking is finished, the paper boards 2 are stacked on a conveyor belt, the conveyor belt sends the paper boards 2 into a spraying mechanism 3 one by one, spraying and wetting are carried out at the positions marked along the line, if a prepressing mechanism 5 is arranged between the spraying mechanism 3 and the conveyor belt, the conveyor belt firstly sends the paper boards 2 into the prepressing mechanism 5, a prepressing convex edge 53 is driven by a first prepressing roller 51 to form shallow marks on the paper boards 2, the paper boards 2 which are prepressed to form the shallow marks are sent into the spraying mechanism 3 to be wetted along with the continuous rotation of the first prepressing roller 51 and a second prepressing roller 52, atomized water or water vapor sprayed out from a spray head 31 in the spraying process is condensed into water drops on the paper boards 2 again, and the spray head 31 is arranged above the position to be marked in advance, so that the sprayed water drops are condensed near the shallow marks to form the shallow marks, the influence of the water drops on the positions, which do not need the indentations, around the paper boards 2, and only the shallow marks are wetted, the wetting is accurate. If the spraying mechanism 3 is integrated with the prepressing mechanism 5, the shallow marks are sprayed and wetted while the prepressing ridges 53 are pressed.

Set up the nozzle on protruding stupefied 53 of preliminary pressing during the pre-compaction promptly and spray the moist protruding stupefied 53 of preliminary pressing, recycle the protruding stupefied 53 of moist pre-pressing and go out the shallow mark on cardboard 2, because protruding stupefied 53 of preliminary pressing is consequently when the shallow mark is being extruded for humid state, shallow mark department has been soaked, just so can avoid the spraying to make cardboard 2 other parts can not appear the phenomenon of getting damp and getting soft to the surrounding cardboard 2 influence, quality is better after the cardboard 2 shaping. When the first prepressing roll 51 is provided with the prepressing groove 54, a gap between the prepressing edge 53 and the prepressing groove 54 can be used as a nozzle, namely when the prepressing edge 53 presses a shallow mark, the prepressing edge 53 moves into the prepressing groove 54 to form a gap with the prepressing groove 54, water is sprayed out from the gap to wet the prepressing edge 53, the shallow mark is directly pressed out by the wet prepressing edge 53, namely a strip of water is arranged at the shallow mark to wet the shallow mark, and after the shallow mark is wet, the paperboard 2 is sent to the rolling assembly 41 to be pressed into the shallow mark again under the continuous rotation of the first prepressing roll 51 and the second prepressing roll 52 to form a complete indentation. Because indentation department is wet by water in advance at the indentation in-process, consequently indentation department can not break because of cardboard 2 is dry at indentation in-process, simultaneously because adopt the operation of impressing shallow trace in advance at moist in-process, make water smoke can enrich in shallow trace department at the in-process that condenses on cardboard 2, little to cardboard 2 other part influence, the influence that makes cardboard 2's overall structure intensity receive is little, cardboard 2 collapse phenomenon can not appear, not only indentation department is more level and more smooth pleasing to the eye but also 2 of cardboard after the indentation are of high quality.

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

1. The utility model provides an indentation device is folded to cardboard (2), includes conveyer belt (1), spraying mechanism (3) and indentation mechanism (4), conveyer belt (1) is carried cardboard (2) and is passed through spraying mechanism (3) and indentation mechanism (4) in proper order, its characterized in that: the creasing mechanism (4) comprises a rolling assembly (41) and a pressing knife assembly (42), the pressing knife assembly (42) is arranged on the rolling assembly (41), and the paperboard (2) penetrates through the rolling assembly (41).

2. A cardboard (2) fold creasing device according to claim 1, characterised in that: the rolling assembly (41) comprises a first compression roller (411) and a second compression roller (412), the pressing knife assembly (42) comprises an indentation knife (421) and a knife die (422), the indentation knife (421) is arranged on the outer wall of the first compression roller (411), the knife die (422) is arranged on the outer wall of the second compression roller (412), the indentation knife (421) is inserted into the knife die (422), a knife groove is formed in the knife die (422), and the indentation knife (421) is inserted into the knife groove.

3. A cardboard (2) fold creasing device according to claim 2, characterised in that: the spraying mechanism (3) comprises a plurality of spray heads (31), the spray heads (31) are communicated with a water source through hoses, and water mist sprayed by the spray heads (31) moistens the paper boards (2).

4. A cardboard (2) fold creasing device according to claim 3, characterised in that: the device is characterized in that a pre-pressing mechanism (5) is arranged between the spraying mechanism (3) and the conveying belt (1), the pre-pressing mechanism (5) comprises a first pre-pressing roller (51) and a second pre-pressing roller (52), a pre-pressing convex edge (53) is arranged on the first pre-pressing roller (51) along the circumferential direction of the first pre-pressing roller (51), and the pre-pressing convex edge (53) is attached to the paperboard (2) in a propping mode.

5. A cardboard (2) fold creasing device according to claim 4, characterised in that: shower nozzle (31) are fixed on protruding stupefied (53) of preliminary pressing, including a plurality of nozzles, it is a plurality of the nozzle is along the even cloth of the length direction of protruding stupefied (53) of preliminary pressing in protruding stupefied (53) of preliminary pressing, set up cavity (511) in first pre-pressure roller (51), the nozzle communicates with cavity (511), be equipped with on first pre-pressure roller (51) be used for to the water inlet of water injection in cavity (511) is equipped with the valve of control water inlet break-make on the water inlet.

6. A cardboard (2) fold creasing device according to claim 4, characterised in that: the pre-pressing device is characterized in that a pre-pressing groove (54) is formed in the first pre-pressing roller (51) along the circumference of the first pre-pressing roller (51), the pre-pressing convex edge (53) is arranged in the pre-pressing groove (54), and a pressure spring (55) is arranged between the pre-pressing groove (54) and the pre-pressing convex edge (53).

7. A creasing device for cardboard (2) according to claim 6, characterized in that: the notch department in preliminary pressing groove (54) is equipped with inward turn-ups (542), protruding stupefied (53) of preliminary pressing are supported and are pasted on turn-ups (542), the tank bottom in preliminary pressing groove (54) is equipped with water hole (541), water hole (541) are connected with the water source through the hose, work as when protruding stupefied (53) of preliminary pressing are pushed down, water is followed protruding stupefied (53) of preliminary pressing with gap between turn-ups (542) is oozed.

8. A cardboard (2) fold creasing device according to claim 7, characterised in that: one side of turn-ups (542) with protruding stupefied (53) contact in advance is equipped with domaticly, be equipped with sealed cushion on the domatic, work as protruding stupefied (53) in advance with when domatic contact, protruding stupefied (53) butt in advance is in sealed cushion.

9. A creasing device for cardboard (2) according to claim 8, characterized in that: the novel guide groove structure is characterized in that a plurality of guide grooves which are parallel to each other are formed in the slope surface, the sealing rubber pads are fixed to the bottoms of the guide grooves, guide protruding ridges which are matched with the guide grooves are formed in the pre-pressing protruding ridges (53), and when the pre-pressing protruding ridges (53) are abutted to the slope surface, the guide protruding ridges are inserted into the guide grooves.

10. A creasing method of a cardboard (2) fold creasing device according to any one of claims 1-9, characterised in that: the method comprises the following steps:

marking lines, namely marking positions where creases need to be pressed on the surface of the paperboard (2);

a pre-pressing step, namely conveying the paperboard (2) subjected to line drawing into a pre-pressing mechanism (5) through a conveying belt (1), pressing shallow marks through pre-pressing convex ridges (53), and spraying water mist at the shallow marks through a spray head (31) while pressing the shallow marks so that the water mist is gathered at the shallow marks to wet the shallow marks;

and an indentation step, namely feeding the paperboard (2) subjected to the pre-pressing step into an indentation mechanism (4), and pressing the position of the shallow mark on the paperboard (2) into the cutter groove through an indentation cutter (421) to form a complete crease.