CN111361221A

CN111361221A - Production method of continuous printing corrugated board

Info

Publication number: CN111361221A
Application number: CN202010317454.7A
Authority: CN
Inventors: 庞甫奇; 李江红; 王志强; 张国平
Original assignee: Xiaogan Yadu Paper Packaging Co ltd
Current assignee: Xiaogan Yadu Paper Packaging Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-07-03

Abstract

The invention relates to a production method of a continuous printing corrugated board. The method comprises the steps of firstly, inputting preheated face paper a base paper and core paper base paper into a single-sided machine for corrugating and bonding treatment to obtain a single-sided corrugated board, and meanwhile, conveying the other layer of face paper b base paper to a printing machine for multiple printing and drying to obtain printing face paper; and then, preheating the printing surface paper and the single-sided corrugated board respectively, conveying the printing surface paper and the single-sided corrugated board together into a double-sided machine for secondary bonding, pressing the obtained corrugated board semi-finished product into a line-touching creasing machine to form a series of creases with fixed intervals, cutting the creases by a longitudinal cutter and a transverse cutter, lifting the creases to a certain height along the inclined plane of a paper-receiving folding machine, then falling down, and folding and packaging the creases into stacks by means of a mechanical arm or manpower. The method has the advantages of high automation degree, greatly improved production efficiency, good surface quality of products, simultaneous printing, corrugation making and bonding, and capability of obtaining the stacked corrugated board finished products in one step.

Description

Production method of continuous printing corrugated board

Technical Field

The invention relates to the technical field of machinery and packaging, in particular to a production method of a continuous printing corrugated board.

Background

Corrugated board is widely used in the field of packaging, and common corrugated board products comprise an upper surface layer, a middle corrugated layer and a lower surface layer, wherein characters and patterns are usually printed on one surface layer. The corrugated boards on the market are divided into discontinuous type and continuous type according to different lengths of finished products, and the discontinuous corrugated boards are cut into small-size independent products with fixed length and width when leaving the production line, so that the corrugated boards can be directly used after being bought by customers; continuous corrugated board is not cut but rather is Z-folded into stacks of up to tens of meters of board (as shown in CN 205134099U) and cut to the desired size for use. Because the continuous corrugated board has higher flexibility and stronger adaptability, the continuous corrugated board is more favored by customers and has better market prospect.

The production technology of the discontinuous corrugated board is mature, the printing and the bonding can be synchronously carried out, a set of complete production flow can obtain qualified finished products, and secondary processing or post-treatment is not needed. However, no continuous corrugated board production equipment and production method are publicly reported at present, and mainly because the connection and implementation of the processes of printing, double-sided adhesion, fold mark formation, folding and the like on the outer surface of the board have many problems, and industrialization cannot be realized at low cost.

Disclosure of Invention

The present invention is directed to overcoming the above problems of the prior art and providing a method for producing a continuous printed corrugated cardboard, the method comprising the steps of: (i) manufacturing a single-sided corrugated board: simultaneously inputting the base paper 1 of the surface paper a and the base paper 2 of the core paper into a single-side machine, and performing corrugating, gluing and bonding in the single-side machine to obtain a single-side corrugated board 12; (ii) manufacturing printing surface paper b: inputting the base paper 3 of the surface paper b into a printing machine, and fully drying and shaping the base paper while printing to obtain printed surface paper b 24; (iii) manufacturing a semi-finished product of the double-faced corrugated board: continuously inputting the single-sided corrugated board 12 and the printing surface paper b24 into a double-sided machine at the same time, and realizing secondary gluing and bonding in the double-sided machine to obtain a semi-finished product 29 of the double-sided corrugated board; (iv) indentation and folding: the semi-finished product 29 of the double-sided corrugated cardboard is conveyed to a line-touching creasing machine to be pressed into creases, then conveyed to a cutting machine to be cut, then conveyed to a high place along an inclined plane by a paper collecting folding machine and freely falls down, and the cardboard is continuously folded in a Z shape along the creases in the falling process to form a stack. The steps are simultaneously and continuously carried out in a pipeline mode.

Further, in the steps (i) and (ii), the surface paper a base paper 1, the core paper base paper 2 and the surface paper b base paper 3 are respectively hung on a base paper support so as to continuously supply paper for a single-side machine or a printing machine, and the surface paper a base paper 1 and the core paper base paper 2 are subjected to multiple heat treatments of a preheating wheel 4 and a preheating cylinder roller (9 or 11) before being bonded.

Further, the heat treatment temperature of the preheating roller 4 is 180 ℃ and the duration of contact of the sheet with the surface of the heat roller is 1 to 5 seconds, the heat treatment temperature of the preheating cylinder roller 9 or 11 is 160-180 ℃ and the duration of contact of the sheet with the surface of the heat roller is 1 to 5 seconds. The primary preheating is mainly used for drying partial moisture in the base paper, and the secondary preheating is used for carrying out moisture balance and shaping according to the moisture conditions of the base paper, the corrugated paper and the surface paper so as to achieve the optimal bonding effect.

Further, the single-sided machine corrugating, sizing and bonding process in the step (i) is as follows: the core paper base paper 2 is preheated by a preheating cylinder roller b 11, enters a space between a vertically arranged single-facer upper corrugated roller 8 and a single-facer lower corrugated roller 6 to be pressed into a corrugated structure, then enters a space between a horizontally arranged single-facer lower corrugated roller 6 and a single-facer upper pulp roller 7 to be glued, and then enters a space between a vertically arranged single-facer pressure roller 5 and a single-facer lower corrugated roller 6; the surface paper a base paper 1 is preheated by a preheating cylinder roller a 9, enters a space between a vertically arranged single-face machine pressure roller 5 and a single-face machine lower corrugated roller 6, is overlapped with the glued core paper base paper 2, is adhered under the extrusion action of the single-face machine pressure roller 5 to form a single-face corrugated board 12, and the single-face corrugated board 12 is conveyed to a double-face machine through a conveying belt 10.

Further, the specific process of step (ii) is as follows: the raw paper 3 of the facial tissue b firstly enters a first printing machine 13 to finish first printing, then is conveyed to a second printing machine 14 to finish second printing, then is dried by a horizontally arranged dryer a 15 and a vertically arranged dryer b 16 in sequence, and finally is output after being checked to be qualified by an image detector 17, so that the printed facial tissue b24 is obtained. The drying temperature of the dryer a 15 and the drying temperature of the dryer b 16 are respectively 35-40 ℃ and 90-100 ℃, and the residence time of the paper in the dryer a 15 and the dryer b 16 is respectively 1-3s and 1-5 s. The facestocks to be printed cannot be preheated in advance because overheating paper can affect ink adhesion and printer life, and the same reason is that drying between prints is not possible. Drying can be carried out only after printing is finished, but the drying speed is not too high, the temperature is not suitable to be too high, and the ink needs to be slowly and fully dried. The paper can remove the moisture absorbed in the paper storage process while being dried, which is equivalent to the preheating treatment of other two layers of paper.

Further, in the step (iii), the single-sided corrugated board 12 is corrected by the deviation corrector 20 before entering the double-sided machine, and then enters the preheating roller b 22 and the preheating roller c23 for preheating, and then enters the sizing roller 39 for gluing; the printed facestock b24 also needs to be fully preheated from the press by a preheat roll a 21 and another preheat roll d 40. The preheating temperature of the preheating roller b 22 and the preheating roller c23 is respectively 110-; the preheating temperature of the preheating roller a 21 and the preheating roller d 40 is respectively 110-.

Further, the specific process of step (iii) is as follows: the single-sided corrugated board 12 and the printing surface paper b24 enter a double-sided machine and are overlapped together, and the formed composite corrugated board is extruded, dried and cooled by an elastic pressing plate array 25 and a pressing roller array 26 in sequence and then clamped between an upper canvas conveyor 28 and a lower canvas conveyor 29 to move forwards, so that a semi-finished product 29 of the double-sided corrugated board is finally obtained.

Further, the specific process of step (iv) is as follows: the double-sided corrugated cardboard semi-finished product 29 firstly enters between an upper knife roller 31 and a lower knife roller 32 which rotate reversely and at a constant speed by a line-touching creasing machine 30, and after protruding pressing strips fixed on the upper knife roller and the lower knife roller are superposed, creasing for folding is pressed at the same position of the upper surface and the lower surface of the cardboard; the paperboard with the surface having the indentation is continuously conveyed forwards, and a corrugated paper finished product 35 with fixed width and length is formed after being cut by a longitudinal cutter 33 and a transverse cutter 34 in sequence; the finished corrugated paper 35 is fed forward by a paper feeder 36, moved upward for a distance along the inclined surface of a lifting carriage 37, moved forward for a distance horizontally and dropped from the air, and folded up along the crease by a robot arm or manually in a continuous zigzag manner to form a stack.

Further, two rewinding

machines

18 and 19 for collecting the printed tissue paper b24 are provided between the printing machine and the perfecting machine. This design allows two options for the printed facestock b24 exiting the printer: firstly, the materials are sent into a rewinder to be packaged and coiled and serve as storage materials for later production; and secondly, the corrugated board directly enters a double-faced machine to be compounded with the single-faced corrugated board 12. The design ensures that the production flexibility is higher, the adjustment is convenient at any time, and the productivity of the original production line can be fully exerted.

Furthermore, the continuous printing corrugated board prepared by the method has unlimited length, the width is 0.9-2.5m, the thickness is 2.5-3.0mm, and the daily output is not less than 52 ten thousand square meters.

Compared with the prior art, the invention has the following beneficial effects: the design, assembly, debugging and production of the continuous printing corrugated board production line are completed for the first time, the automation degree is high, the production adaptability is strong, and the production process is flexible and changeable; the bonding and printing of each layer are carried out simultaneously, and finished products are obtained in one step, so that the production efficiency is high; the core paper base paper and the surface paper base paper are subjected to multiple progressive heat treatments before bonding or printing, and the prepared paperboard has good surface quality; the crease forming mode is simple, the distance between adjacent creases is flexibly adjusted, and the finished product is folded, stacked, quick, simple and convenient to transport; the length, the width and the complexity of the printed patterns of the paper board can be adjusted conveniently, and the individualized packaging requirements of customers are greatly met.

Drawings

FIG. 1 is a schematic diagram of a single-side machine and a base paper module of the apparatus;

FIG. 2 is a schematic view of a printer module of the apparatus;

FIG. 3 is a schematic view of a module of the apparatus;

FIG. 4 is a schematic diagram of a line-touch indenter and a guillotine module of the device;

fig. 5 is a schematic diagram of a delivery folder module of the device.

1-tissue a base paper, 2-core base paper, 3-tissue b base paper, 4-preheating wheel, 5-single-side machine pressure roller, 6-single-side machine lower corrugated roller, 7-single-side machine upper pulp roller, 8-single-side machine upper corrugated roller, 9-preheating cylinder roller a, 10-conveying belt, 11-preheating cylinder roller b, 12-single-side corrugated board, 13-first printing machine, 14-second printing machine, 15-dryer a, 16-dryer b, 17-image detector, 18-preheating machine a, 19-rewinding machine b, 20-deviation corrector, 21-preheating roller a, 22-preheating roller b, 23-preheating roller c, 24-printing tissue b, 25-elastic pressure plate array, 26-pressure roller array and 27-upper canvas conveying machine, 28-lower canvas conveyer, 29-double-faced corrugated cardboard semi-finished product, 30-line-touching imprinter, 31-upper knife roll, 32-lower knife roll, 33-slitting machine, 34-transverse cutting machine, 35-finished corrugated cardboard, 36-paper feeder, 37-lifting conveying rack, 38-folding table, 39-sizing roll and 40-preheating roll d.

Detailed Description

In order to make those skilled in the art fully understand the technical solution of the present invention, the following embodiments are further described.

As shown in fig. 1-5, a set of continuous corrugated board production device with characters and patterns printed on the surface mainly comprises a single-face machine, a printing machine, a double-face machine, a line-touching creasing machine, a cutting machine and a paper collecting folding machine which are connected in sequence. The whole production line is on a straight line, paper moves from right to left (the left is the paper advancing direction), the raw facial tissue paper and the raw core paper are subjected to secondary bonding with the other layer of printed raw facial tissue paper after corrugating and single-side bonding, and finally, the raw facial tissue paper and the raw core paper are subjected to creasing, vertical cutting, transverse cutting and folding to be packed into stacks, so that a corrugated board stack finished product which is folded in a Z shape is obtained.

The rolled surface paper a base paper 1 and core paper base paper 2 enter a single-side machine from two sides after being preheated by a conveying belt, a conveying wheel and a preheating wheel 4; the raw paper 1 of the surface paper a is preheated for the second time by a preheating cylinder roller a 9 of the single-side machine and then enters between a pressure roller 5 of the single-side machine and a lower corrugated roller 6 of the single-side machine; the core paper base paper 2 sequentially passes through a preheating cylinder roller b 11 (secondary preheating), a single-side machine upper corrugated roller 8, a single-side machine lower corrugated roller 6 and a single-side machine upper sizing roller 7, and then enters between the single-side machine pressure roller 5 and the single-side machine lower corrugated roller 6 (corrugation making and sizing are completed in the process); the paper 1 of the surface paper a and the paper 2 of the core paper are bonded under the extrusion action of a pressure roller 5 of a single-sided machine, the formed single-sided corrugated board 12 is conveyed forwards by a conveying belt and is subjected to deviation correction by a deviation corrector 20 to be ready to enter a double-sided machine to be bonded with the printed surface layer paper.

The coiled body paper 3 of the facial tissue b enters a printing machine after being conveyed by a conveying belt and a conveying wheel, and is firstly subjected to ground color printing or printing of first heavy colors, patterns and characters by a first printing machine 13 in the printing machine, and then is subjected to spot color printing or printing of second heavy colors, patterns and characters by a second printing machine 14, so that printing of multi-level, multiple colors, complex patterns and characters is realized, and the appearance effect of the paperboard is ensured. The base paper after the double printing sequentially passes through two dryers of different types which are horizontally and vertically arranged, so that the moisture in the paper is removed while the printing ink is dried, and the function of heat treatment for shaping the paper can be achieved. The dried printing base paper was confirmed to be acceptable by the image detector 17 (industrial inspection camera), and the printing surface paper b24 was obtained. Normally the printed tissue paper b enters the duplex machine directly to be glued to the single face corrugated paper, but in order to ensure production flexibility to cope with emergency situations, two sets of

rewinders

18 and 19 are provided between the duplex machine and the printing press for temporarily packing the printed tissue paper b into rolls for later use.

The single-sided corrugated board 12 and the printing surface paper b24 sequentially pass through two preheating rollers and then enter a double-sided machine (the former needs to additionally glue the single-sided corrugated board through a sizing roller 39), and reliable bonding is realized under the multiple actions of extrusion, drying and cooling of the elastic pressing plate array 25 and the pressing roller array 26. The press roll array 26 is positioned between the conveyor belts of the upper canvas conveyor and the lower canvas conveyor, and the press roll array and the conveyor belts are combined to realize multiple functions of conveying, cooling and shaping the paperboard. The double-faced corrugated cardboard semi-finished product 29 from the double-faced machine enters between an upper knife roller and a lower knife roller of the line-touching imprinter 30 (the structure of the knife roller is similar to a gear shaft with only one rack), forms imprints at regular time under the discontinuous extrusion action of the knife rollers and continues to convey forwards, and the corrugated cardboard semi-finished product 35 with fixed width and fixed length (whether to transversely cut according to requirements) is obtained after sequentially passing through a slitting machine and a transverse cutting machine. The finished corrugated paper is driven by the paper feeder 36 to move upwards to a certain height along the slope of the paper collecting and folding machine, then the finished corrugated paper is continuously moved forwards horizontally for a certain distance and naturally drops, mechanical arms (manually operated in the early development stage) arranged on a frame around the folding table 38 alternately complete the left-right folding action of the corrugated paper, and the obtained finished corrugated paper board stack is transported away by a forklift.

Claims

1. A method of producing continuous printed corrugated board, the method comprising the steps of: (i) manufacturing a single-sided corrugated board: simultaneously inputting the base paper (1) of the face paper a and the base paper (2) of the core paper into a single-side machine, and realizing corrugating, gluing and bonding in the single-side machine to obtain a single-side corrugated board (12); (ii) manufacturing printing surface paper b: inputting the base paper (3) of the surface paper b into a printing machine, fully drying and setting while printing to obtain printing surface paper b (24); (iii) manufacturing a semi-finished product of the double-faced corrugated board: continuously inputting the single-sided corrugated board (12) and the printing surface paper b (24) into a double-sided machine at the same time, and realizing secondary gluing and bonding in the double-sided machine to obtain a semi-finished product (29) of the double-sided corrugated board; (iv) indentation and folding: conveying the double-sided corrugated cardboard semi-finished product (29) to a line-touching creasing machine to press a series of crease marks with fixed intervals, conveying the double-sided corrugated cardboard semi-finished product to a cutting machine to cut, conveying the double-sided corrugated cardboard semi-finished product to a high place along an inclined plane by a paper collecting folding machine and freely falling down, and continuously folding the cardboard in a zigzag manner along the crease marks in the falling process to form a stack; the steps are simultaneously and continuously carried out in a pipeline mode.

2. The method of claim 1, wherein: in the steps (i) and (ii), the surface paper a base paper (1), the core paper base paper (2) and the surface paper b base paper (3) are respectively hung on base paper supports so as to continuously supply paper for a single-side machine or a printing machine, and the surface paper a base paper (1) and the core paper base paper (2) are subjected to multiple heat treatments of a preheating wheel (4), a preheating cylinder roller a (9) and a preheating cylinder roller b (11) before bonding.

3. The method of claim 2, wherein: the heat treatment temperature of the preheating wheel (4) is 180 ℃, the contact duration of the paper with the surface of the hot roller is 1-5s, the heat treatment temperature of the preheating cylinder roller a (9) and the preheating cylinder roller b (11) is 160-180 ℃, and the contact duration of the paper with the surface of the hot roller is 1-5 s.

4. The method of claim 1, wherein the steps of (i) single-sided machine corrugating, sizing, and bonding are as follows: the core paper base paper (2) is preheated by a preheating cylinder roller b (11), enters a space between a vertically arranged single-facer upper corrugated roller (8) and a single-facer lower corrugated roller (6) to be pressed into a corrugated structure, then enters a space between the horizontally arranged single-facer lower corrugated roller (6) and a single-facer upper sizing roller (7) to be glued, and then enters a space between a vertically arranged single-facer pressure roller (5) and the single-facer lower corrugated roller (6); the surface paper a base paper (1) is preheated by a preheating cylinder roller a (9), enters a space between a vertically arranged single-facer pressure roller (5) and a single-facer lower corrugated roller (6), is overlapped with the glued core paper base paper (2), is bonded under the extrusion action of the single-facer pressure roller (5) to form a single-faced corrugated board (12), and the single-faced corrugated board (12) is conveyed to a double-facer by a conveying belt (10).

5. The method according to claim 1, wherein the step (ii) is performed as follows: the tissue b base paper (3) firstly enters a first printing machine (13) to finish first printing, then is conveyed to a second printing machine (14) to finish second printing, then is dried by a horizontally arranged dryer a (15) and a vertically arranged dryer b (16) in sequence, and finally is output after being checked to be qualified by an image detector (17) to obtain printed tissue b (24); the drying temperature of the dryer a (15) and the drying temperature of the dryer b (16) are respectively 35-40 ℃ and 90-100 ℃, and the residence time of the paper in the dryer a (15) and the dryer b (16) is respectively 1-3s and 1-5 s.

6. The method of claim 1, wherein: in the step (iii), the single-sided corrugated board (12) firstly passes through a deviation corrector (20) to correct the position before entering the double-sided machine, then enters a preheating roller b (22) and a preheating roller c (23) to be preheated, and then enters a sizing roller (39) to be coated with glue; after the printing surface paper b (24) comes out of the printing machine, the printing surface paper b needs to be fully preheated by a preheating roller a (21) and another preheating roller d (40); the preheating temperature of the preheating roller b (22) and the preheating roller c (23) is respectively 110-; the preheating temperature of the preheating roller a (21) and the preheating roller d (40) is respectively 110-.

7. The method according to claim 1, wherein the step (iii) is performed as follows: the single-sided corrugated board (12) and the printing surface paper b (24) enter a double-sided machine and are then overlapped together, and the formed composite corrugated board is extruded, dried and cooled by an elastic pressing plate array (25) and a pressing roller array (26) in sequence and then clamped between an upper canvas conveyor and a lower canvas conveyor to move forwards, so that a semi-finished product (29) of the double-sided corrugated board is finally obtained.

8. The method according to claim 1, wherein the step (iv) is performed as follows: the semi-finished product (29) of the double-faced corrugated cardboard firstly enters between an upper knife roller and a lower knife roller which rotate reversely and at a constant speed by a line-touching imprinter (30), and after protruding pressing strips fixed on the upper knife roller and the lower knife roller are superposed, pressing marks for folding are pressed at the same position of the upper surface and the lower surface of the cardboard; the paper board with the surface having the indentation is continuously conveyed forwards, and a corrugated paper finished product (35) with fixed width and length is formed after being cut by a longitudinal cutter (33) and a transverse cutter (34) in sequence; the corrugated paper finished product (35) is conveyed forwards by a paper feeder (36), moves upwards for a certain distance along the inclined plane of a lifting conveying frame (37), then moves forwards for a certain distance horizontally and falls from the air, and is folded along the crease by a mechanical arm or manually according to a continuous Z shape to form a stack.

9. The method of claim 1, wherein: two rewinding machines for collecting the printing surface paper b (24) are also arranged between the printing machine and the double-sided machine.

10. The method of claim 1, wherein: the continuous printing corrugated board prepared by the method has unlimited length, width of 0.9-2.5m, thickness of 2.5-3.0mm, and daily output of not less than 52 ten thousand square meters.