1. The utility model provides a low ration high strength packing cardboard, its characterized in that includes waterproof skin (1), honeycomb layer (2) and folded layer (4) that set gradually from outer to interior, and the inboard of waterproof skin (1) is formed with arch bridge structure (3) with the position of honeycomb layer (2) contact, and folded layer (4) comprise the cardboard that is V type or W type, and one side packing that the cardboard is towards honeycomb layer (2) has plastic foam (5).

2. A method of producing a low basis weight, high strength packaging board as claimed in claim 1, characterized by the steps of; conveying the slurry into a former, communicating the former with a vacuum pump, vacuumizing the interior of the former by the vacuum pump, absorbing moisture, and stopping a slurry film on the former to form a material layer;

step two, transferring the formed material layer to a receiving roller, pre-drying the material layer by vacuumizing the interior of the receiving roller, transferring the dried material layer to a dryer, heating and drying, and keeping the drying stability at 98-150 ℃ for 3-4 min;

and step three, cooling the dried paper board in a setting roller by using cooling water, and then bonding the compound paper board by using a corrugated case bonder to form a finished product.

3. The method for producing the low-basis-weight high-strength packaging paperboard as claimed in claim 2, wherein the corrugated cardboard box gluing machine comprises a glue brushing roller (15) arranged on a belt conveying system, a glue injection opening is formed in the circumferential surface of the glue brushing roller (15) and is sealed and covered by a sealing cover, rotating shafts (17) are connected to both ends of the glue brushing roller (15), the rotating shafts (17) are rotatably sleeved in bearing brackets (18) fixed on the belt conveying system, wherein the inside of one rotating shaft (17) is of a solid structure, the rotating shaft (17) is in driving connection with a third motor (16), the inside of the other rotating shaft (17) is of a hollow structure, a central shaft (21) is rotatably arranged at the center of the inside of the glue brushing roller (15), the central shaft (21) extends outwards through the rotating shaft (17) and then is connected with a driving shaft (20), pivot (17) rotate with center pin (21) and are connected, the one end of center pin (21) is connected in second motor (14), the symmetry is seted up on the periphery of brush gluey roller (15) and is fan-shaped distribution's play gluey hole (19), and the fan-shaped angle that goes out gluey hole (19) cladding is 90, be connected with arc baffle (23) that are 90 through connecting rod (22) on center pin (21), both sides distribute on the inner wall of brush gluey roller (15) and be used for backstop arc baffle (23) pivoted backstop board (24).

4. The production method of the low-basis-weight high-strength packaging paperboard as claimed in claim 3, characterized in that the belt conveying system comprises a conveying table (7) fixed on the support frame (6), one end of the conveying table (7) is rotatably provided with a driving roller (9), the other end of the conveying table (7) is rotatably provided with an auxiliary roller (11), a first motor (8) is arranged outside the conveying table (7), the first motor (8) penetrates through the conveying table (7) and is in driving connection with the driving roller (9), and a conveying belt (10) is sleeved between the driving roller (9) and the auxiliary roller (11).

5. The method for producing a low basis weight high strength packaging paperboard according to claim 4, characterized in that mounting brackets (12) are respectively fixed on two sides of the conveying table (7) corresponding to the positions of the third motor (16) and the second motor (14), wherein the third motor (16) is fixed on the corresponding mounting bracket (12), a sleeve (13) is fixed on the other mounting bracket (12), the second motor (14) is rotatably sleeved inside the sleeve (13), and the second motor (14) penetrates through the corresponding mounting bracket (12) and then is connected with the driving shaft (20).

6. The method for producing a low basis weight high strength packing paperboard according to any one of claims 3 to 5, wherein the corrugated box gluing machine is used as follows:

opening a sealing cover of a glue brushing roller (15), injecting glue into the glue brushing roller (15), then covering by using the sealing cover, starting a belt conveying system, placing a paper board to be bonded on a conveying belt (10), simultaneously starting a third motor (16) to drive the glue brushing roller (15) to rotate, moving the paper board forwards to the position of the glue brushing roller (15) along the conveying belt (16), starting a second motor (14), driving a central shaft (21) to rotate by the second motor (14), driving two arc-shaped baffles (23) to rotate for 90 degrees by clockwise rotation of the central shaft (21), stopping the second motor (14), allowing the adhesive in the glue brushing roller (15) to flow out through a glue outlet hole (19), contacting the paper board when passing through the glue brushing roller (15), thereby attaching the adhesive brush on the paper board, and when the belt conveying system breaks down and stops, the second motor (14) rotates 90 degrees anticlockwise, the arc-shaped baffle (23) blocks up the glue outlet (19) on the glue brushing roller (15), the third motor (16) keeps the starting state to drive the glue brushing roller (15) to rotate, and the adhesive inside the glue brushing roller (15) is continuously stirred under the disturbing action of the two stop plates (24) to prevent the adhesive from precipitating.

Background

The paper packaging industry in China is developed rapidly, particularly under the large trend and the large background of circular economy and environmental protection, the carton products are developed towards the direction of low ration and high strength, so that the packaging industry can obtain the real competitive advantage under the intense market environment, and a better development space is obtained. The low-basis weight and high-strength means that the basis weight of paper for packaging products is obviously reduced through innovation and improvement of production technology, the overall strength of the products is kept unchanged or improved, the production cost of the products is reduced to a certain extent, and the economic benefit of enterprises is improved. The process practice shows how the quality of the paper material for the corrugated layer directly affects the forming quality of the corrugated board. The indexes of the corrugated base paper, such as moisture, sizing degree, water absorption, tightness, transverse ring crush strength and the like, have the most obvious influence on the strength and quality of the finished product carton. The corrugated paper of the national standard only has quantitative, tightness, moisture, fracture length and transverse ring crush index detection items, but does not have sizing degree detection items. In fact, the sizing degree has a great influence on the processing quality of corrugated boards and the stability of the quality of finished products of the corrugated boards, and if a production process or a machine is stopped in midway for some reason, the viscosity and the quality of the adhesive in a pipeline are easy to be unstable due to a precipitation state, so that how to continuously ensure the quality of the adhesive is also a technical problem to be solved in the field.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a low basis weight high strength packaging paperboard, which is composed of a waterproof outer layer, a honeycomb layer and a folding layer, wherein an arch bridge structure is formed at the position where the waterproof outer layer contacts with the honeycomb layer, and the arch bridge structure can transfer the force applied to the paperboard to the direction parallel to the paperboard, thereby preventing the paperboard from being broken through.

The invention provides a low-basis-weight high-strength packaging paperboard which comprises a waterproof outer layer, a honeycomb layer and a folding layer, wherein the waterproof outer layer, the honeycomb layer and the folding layer are sequentially arranged from outside to inside, an arch bridge structure is formed at the position where the inner side of the waterproof outer layer is in contact with the honeycomb layer, the folding layer is composed of V-shaped or W-shaped paperboards, and one side of each paperboard, which faces to the honeycomb layer, is filled with plastic foam.

The invention also provides a production method of the low-basis-weight high-strength packaging paperboard, which comprises the following steps;

conveying the slurry into a former, communicating the former with a vacuum pump, vacuumizing the interior of the former by the vacuum pump, absorbing moisture, and stopping a slurry film on the former to form a material layer;

step two, transferring the formed material layer to a receiving roller, pre-drying the material layer by vacuumizing the interior of the receiving roller, transferring the dried material layer to a dryer, heating and drying, and keeping the drying stability at 98-150 ℃ for 3-4 min;

and step three, cooling the dried paper board in a setting roller by using cooling water, and then bonding the compound paper board by using a corrugated case bonder to form a finished product.

Preferably, the corrugated carton gluing machine in the third step comprises a glue brushing roller arranged on a belt conveying system, a glue injection port is formed in the circumferential surface of the glue brushing roller, the glue injection port is sealed and covered by a sealing cover, two ends of the glue brushing roller are both connected with rotating shafts, the rotating shafts are rotatably sleeved in bearing supports fixed on the belt conveying system, the inside of one rotating shaft is of a solid structure and is in driving connection with a third motor, the inside of the other rotating shaft is of a hollow structure, a central shaft is rotatably arranged at the center of the inside of the glue brushing roller, the central shaft extends outwards through the rotating shaft and is connected with a driving shaft, the rotating shafts are rotatably connected with the central shaft, one end of the central shaft is connected with a second motor, glue outlet holes distributed in a fan shape are symmetrically formed in the circumferential surface of the glue brushing roller, the fan-shaped angle covered by the glue outlet holes is 90 degrees, and an arc-shaped baffle, and stop plates for stopping the arc-shaped baffle plate from rotating are distributed on two sides of the inner wall of the glue brushing roller.

Preferably, the belt conveying system comprises a conveying table fixed on the support frame, an active roller is installed at one end of the conveying table in a rotating mode, an auxiliary roller is installed at the other end of the conveying table in a rotating mode, a first motor is installed on the outer side of the conveying table and connected with the active roller in a driving mode after penetrating through the conveying table, and a conveying belt is sleeved between the active roller and the auxiliary roller.

Preferably, the positions of the two sides of the conveying table corresponding to the third motor and the second motor are respectively fixed with a mounting frame, wherein the third motor is fixed on the corresponding mounting frame, the other mounting frame is fixed with a sleeve, the second motor is rotatably sleeved inside the sleeve, and the second motor is connected with the driving shaft after penetrating through the corresponding mounting frame.

Preferably, the corrugated carton gluing machine is used as follows:

opening a sealing cover of the glue brushing roller, injecting glue into the glue brushing roller, then covering by using the sealing cover, starting a belt conveying system, placing a paper board to be bonded on a conveying belt, simultaneously starting a third motor to drive the glue brushing roller to rotate, moving the paper board forwards to the position of the glue brushing roller along the conveying belt, starting a second motor, driving a central shaft to rotate, driving two arc-shaped baffles to rotate for 90 degrees by clockwise rotation of the central shaft, stopping the second motor, allowing the glue in the glue brushing roller to flow out through glue outlet holes, contacting the paper board when passing through the glue brushing roller, thereby attaching a glue brush on the paper board, when the belt conveying system fails and stops, rotating the second motor counterclockwise for 90 degrees, blocking the glue outlet holes on the glue brushing roller by the arc-shaped baffles, keeping the third motor in a starting state to drive the glue brushing roller to rotate, the viscose agent in the brush glue roller is constantly stirred under the disturbance effect of two backstop boards, prevents that the viscose agent from taking place to deposit.

The beneficial effects of the invention are as follows:

(1) the packaging paperboard comprises a waterproof outer layer, a honeycomb layer and a folding layer, wherein an arch bridge structure is formed at the position, in contact with the honeycomb layer, of the inner side of the waterproof outer layer, the arch bridge structure can transfer the force applied to the paperboard to the direction parallel to the paperboard, so that the paperboard is prevented from being broken by penetration, the folding layer is formed by the V-shaped or W-shaped paperboard, the quantitative amount of the paperboard can be reduced, the paperboard can have a certain buffering effect, the paperboard is prevented from being directly contacted with objects stored in a carton when being subjected to hard impact, and the side, facing the honeycomb layer, in the folding layer is filled with plastic foam, so that the plastic foam is changed into things of value, the energy is saved, and the buffering effect of the folding layer can be further enhanced.

(2) According to the corrugated carton gluing machine, the glue brushing roller is arranged on the belt conveying system, the interior of the glue brushing roller is of a cavity structure, the adhesive is injected into the glue brushing roller, the adhesive inside the glue brushing roller flows out through the glue outlet hole, the paperboard is in contact with the glue brushing roller when passing through the glue brushing roller, so that the adhesive is brushed on the paperboard, when the belt conveying system breaks down and stops, the second motor rotates 90 degrees anticlockwise, the glue outlet hole in the glue brushing roller is blocked by the arc-shaped baffle, the third motor keeps a starting state to drive the glue brushing roller to rotate, the adhesive inside the glue brushing roller is continuously stirred under the disturbance effect of the two stop plates, the adhesive is prevented from precipitating, and the quality of the adhesive can be kept all the time.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the construction of the present invention of a packing carton board;

FIG. 2 is a schematic view of a first angle of the corrugated box gluing machine of the present invention;

FIG. 3 is a schematic view of a second angle of the corrugated box gluing machine of the present invention;

fig. 4 is a partial structural view of a corrugated box gluing machine according to the present invention;

FIG. 5 is a schematic view of the internal structure of the glue brushing roller in the invention;

FIG. 6 is a schematic view of the assembly structure of the arc-shaped baffle plate and the central shaft in the present invention;

FIG. 7 is a schematic cross-sectional view of a glue brushing roller according to the present invention.

In the figure: 1. a waterproof outer layer; 2. a honeycomb layer; 3. an arch bridge structure; 4. a folding layer; 5. plastic foam; 6. a support frame; 7. a transfer table; 8. a first motor; 9. an active roller; 10. a conveyor belt; 11. an auxiliary roller; 12. a mounting frame; 13. a sleeve; 14. a second motor; 15. a glue brushing roller; 16. a third motor; 17. a rotating shaft; 18. a bearing support; 19. a glue outlet hole; 20. a drive shaft; 21. a central shaft; 22. a connecting rod; 23. an arc-shaped baffle plate; 24. a stop plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The embodiment discloses a low-quantitative high-strength packaging paperboard, which comprises a waterproof outer layer 1, a honeycomb layer 2 and a folding layer 4 which are sequentially arranged from outside to inside, wherein an arch bridge structure 3 is formed at the position where the inner side of the waterproof outer layer 1 is contacted with the honeycomb layer 2, when the paperboard receives external pressure or impact (the force is relatively vertical to the paperboard), the arch bridge structure 3 can transfer the force applied to the paperboard to the direction parallel to the paperboard so as to prevent the paperboard from being broken by penetration, the folding layer 4 is composed of V-shaped or W-shaped paperboards, the folding layer 4 can reduce the quantitative amount of the paperboard and enable the paperboard to have certain buffering effect by adopting the structure, the paperboard is prevented from being directly contacted with things stored in a carton when being subjected to hard impact, and the side of the paperboard facing the honeycomb layer 2 is filled with plastic foam 5, the invention fills the plastic foam 5 in the folding layer 4, not only can change the waste of the plastic foam into valuable and save energy, but also can further strengthen the buffer function of the folding layer 4.

In addition, the invention also provides a production method of the low-basis weight high-strength packaging paperboard, which comprises the following specific steps;

step one, slurry for producing the paper board is conveyed into a former, the former is communicated with a vacuum pump, the inside of the former is vacuumized through the vacuum pump, moisture of the slurry is absorbed in the former generating negative pressure, and a slurry film stays on the former to form a material layer.

And step two, transferring the formed material layer to a receiving roller, pre-drying the material layer by vacuumizing the interior of the receiving roller, absorbing the moisture on the slurry film by negative pressure generated in the receiving roller, attaching the material layer to the surface of the receiving roller, so that the receiving roller cannot be damaged, transferring the material layer subjected to pre-drying treatment into a dryer, heating and drying, keeping the drying at 98-150 ℃ stably for 3-4 min, and drying the material layer in which the moisture is fully contained in a heating mode.

And step three, cooling the dried paper board in a setting roller by using cooling water, and then bonding the compound paper board by using a corrugated case bonder to form a finished product.

In the invention, the gluing of the composite surface paper in the third step adopts a corrugated case gluing machine, as the core technical scheme of the invention, the corrugated case gluing machine comprises a glue brushing roller 15 arranged on a belt conveying system, the circumferential surface of the glue brushing roller 15 is provided with a glue injection opening, the glue injection opening is sealed and covered by a sealing cover, and before use, the blended adhesive is injected into the glue brushing roller 15 through a pouring gate. The two ends of the glue brushing roller 15 are both connected with a rotating shaft 17, the rotating shaft 17 is rotatably sleeved in a bearing support 18 fixed on the belt conveying system, the inside of one rotating shaft 17 is of a solid structure, the rotating shaft 17 is in driving connection with a third motor 16, and the glue brushing roller 15 is driven to rotate by the third motor 16. The other rotating shaft 17 is internally of a hollow structure, a central shaft 21 is rotatably installed at the center inside the glue brushing roller 15, the central shaft 21 extends outwards through the rotating shaft 17 and then is connected with a driving shaft 20, the rotating shaft 17 is rotatably connected with the central shaft 21, one end of the central shaft 21 is connected with the second motor 14, the second motor 14 drives the driving shaft 20 and the central shaft 21 to synchronously rotate, glue outlet holes 19 distributed in a fan shape are symmetrically formed in the circumferential surface of the glue brushing roller 15, the fan-shaped angle covered by the glue outlet holes 19 is 90 degrees, the glue brushing roller 15 rotates by the third motor 16, glue inside the glue brushing roller 15 seeps out from the glue outlet holes 19 to coat the glue on a paperboard, an arc-shaped baffle plate 23 with an angle of 90 degrees is connected to the driving central shaft 21 through a connecting rod 22, stop plates 24 for stopping the rotation of the arc-shaped baffle plate 23 are distributed on two sides of the inner wall of the glue brushing roller 15, and the central shaft 21 is driven by the second motor 14 to rotate, and then drive two cowl 23 and rotate, and because the restriction of backstop 24 mounted position and cowl 23 self structure, cowl 23 is reciprocal under the drive of second motor 14 carries out 90 rotary motion, when brush gluey roller 15 during operation, cowl 23 clockwise rotation 90, it is linked together with brush gluey roller 15 inside to go out gluey hole 19, the viscose goes out gluey smoothly, when finishing using or belt conveying system breaks down, cowl 23 anticlockwise rotation 90 will go out gluey hole 19 and block up, and third motor 16 then continues to keep rotatory, continuous quilt stirring under the perturbation of viscose backstop 24, prevent that the viscose from taking place to deposit.

Specifically, the belt conveying system in this embodiment is including fixing conveying platform 7 on support frame 6, the one end of conveying platform 7 is rotated and is installed initiative roller 9, the other end is rotated and is installed supplementary roller 11, first motor 8 is installed in the outside of conveying platform 7, first motor 8 passes behind the conveying platform 7 and is connected with initiative roller 9 drive, the cover is equipped with conveyer belt 10 between initiative roller 9 and the supplementary roller 11, the cardboard is placed and is conveyed to brush gluey roller 15 below on conveyer belt 10, then brush gluey roller 15 goes out to glue and scribble the adhesive on the cardboard.

Furthermore, mounting frames 12 are respectively fixed at positions corresponding to the third motor 16 and the second motor 14 at two sides of the conveying table 7, wherein the third motor 16 is fixed on the corresponding mounting frame 12, the third motor 16 drives the glue brushing roller 15 to rotate, and simultaneously, the second motor 14 also rotates synchronously with the glue brushing roller 15, in order to form a support for the second motor 14, a sleeve 13 is fixed on the other mounting frame 12, the second motor 14 is rotatably sleeved inside the sleeve 13, and the second motor 14 penetrates through the corresponding mounting frame 12 and then is connected with the driving shaft 20.

The corrugated carton bonder has the specific working principle that: opening a sealing cover of a glue brushing roller 15, injecting glue into the glue brushing roller 15, then covering by using the sealing cover, starting a belt conveying system, placing a paper board to be bonded on a conveying belt 10, simultaneously starting a third motor 16 to drive the glue brushing roller 15 to rotate, moving the paper board forwards along the conveying belt 16 to the position of the glue brushing roller 15, starting a second motor 14, driving a central shaft 21 to rotate by the second motor 14, driving two arc-shaped baffles 23 to rotate for 90 degrees by clockwise rotation of the central shaft 21, stopping the second motor 14, allowing the glue in the glue brushing roller 15 to flow out through glue outlet holes 19, contacting the paper board with the glue brushing roller 15 when passing through the glue brushing roller 15, thereby brushing the glue on the paper board, when the belt conveying system fails and stops, rotating the second motor 14 anticlockwise for 90 degrees, blocking glue outlet holes 19 on the glue brushing roller 15 by the arc-shaped baffles 23, the third motor 16 keeps a starting state to drive the glue brushing roller 15 to rotate, and the adhesive inside the glue brushing roller 15 is continuously stirred under the disturbance action of the two stop plates 24, so that the adhesive is prevented from precipitating.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.