Low-waste environment-friendly pre-printed paperboard upward production line and production process thereof

Abstract

The application discloses a low-loss environment-friendly pre-printed paperboard upward production line and a production process thereof, and has the structure of a see-through paper forming part, a pre-printed paper and see-through paper conveying section and a double-sided machine. The double-sided machine comprises a front hot plate conveying part, a breathable heating transition section and a rear conveying part. The breathable heating transition section is provided with heat sources on the upper and lower sides of a breathable heating channel. The upper side of the breathable heating channel is provided with a plurality of rollers for preventing the printing layer of the pre-printed paper from being scratched. The rollers are arranged in the breathable heating channel and form a breathable gap between the rollers. When the pre-printed paper and see-through paper on the pre-printed paper frame enter the double-sided machine, the printing layer of the pre-printed paper faces upward and moves synchronously with the front hot plate conveying part, the rollers and the rear conveying part, so as to prevent the printing layer from being scratched. The pre-printed paper frame is arranged close to the entrance end of the double-sided machine, so that the waste of the pre-printed paper is reduced. Meanwhile, the printing layer of the pre-printed paper faces upward, so that the printing layer can move synchronously with the conveying parts of the double-sided machine and is prevented from being abraded, thereby reducing the loss caused by scratching.

Description

TECHNICAL FIELD

[0001] The present application relates to a corrugated paperboard production line, in particular to a low-waste and environmentally friendly pre-printed paperboard face-up production line capable of producing water-based ink printed pre-printed paperboard and a production process thereof. BACKGROUND

[0002] The development of corrugated paperboard production equipment is closely related to printing processes. Current pre-printing is mainly divided into three types:

[0003] 1. Offset printing pre-printing: good printing quality, low plate making cost, and low printing plate durability, and solvent-based ink is used, which is not environmentally friendly.

[0004] 2. Gravure printing pre-printing: good printing quality, high plate making cost, good printing durability, and solvent-based ink is used.

[0005] 3. Flexographic printing pre-printing: good printing quality, low paperboard cost, moderate printing durability, and environmentally friendly paper box water-based ink is used.

[0006] Each of the three pre-printing methods has its own advantages, but in the long run, flexographic printing pre-printing has a broader prospect because it not only meets the quality requirements of customers with high-quality products, but also uses non-toxic and harmless paper box water-based ink, which conforms to the trend of environmental protection and is beneficial to the health of consumers and front-line workers.

[0007] Pre-printing is web printing, and then the printed web is used as the outermost layer of paper on the corrugator. The pre-printed outer layer paper and the corrugated paper are bonded together by a double-sided machine, which is more suitable for large quantities of color-printed cartons.

[0008] However, there are mainly two ways of feeding paper by the current double-sided machine. One is that the printing layer of the pre-printed paper faces downward during transmission. At this time, the printing layer is in sliding friction with the hot plate on the lower side of the double-sided machine channel, and in combination with high-speed transmission, the surface temperature of the printing layer is very high. Therefore, a high-temperature resistant film needs to be provided on the surface of the printing layer of the pre-printed paper, which greatly increases the cost. The high-temperature resistant film will be scratched by sliding friction with the hot plate, causing poor scratching and stringing on the surface of the carton.

[0009] The other is that the printing layer of the pre-printed paper faces upward during transmission. The printing layer moves synchronously with the conveyor belt above the hot plate channel, so it is not easy to be scratched. However, the derived problem is that the temperature on the upper side of the hot plate channel of the double-sided machine is not high enough, resulting in poor adhesion of the pre-printed paper to the corrugated paper. In addition, due to the poor air permeability of the conveyor belt, the drying efficiency of the paste and the quality of the paperboard are affected. Of course, in addition to this, the current paperboard production line with the printing layer of the pre-printed paper facing upward also has many shortcomings, such as problems of sizing and breaking, deviation correction, pre-printed paper waste and breaking, and low stacking and collecting effect.

[0010] In summary, it is necessary to design a corrugated paperboard production line which can realize environment-friendly preparation of corrugated paperboard, less paper consumption, avoid scratching the printed layer of pre-printed paper, and print paperboard with water-based ink instead of traditional offset printing paperboard. SUMMARY

[0011] The present application aims to provide a low-consumption environmentally-friendly pre-printed paperboard face-up production line and its production process, which has a simple structure, can heat from both sides, improve the drying speed of paste, improve the bonding quality of each layer of paperboard, reduce the consumption of pre-printed paper, and is suitable for processing water-based ink printed pre-printed paperboard.

[0012] The purpose of the present application is achieved as follows:

[0013] A low-consumption environmentally-friendly pre-printed paperboard face-up production line, comprising a see pit paper forming part, a pre-printed paper and see pit paper conveying section, and a double-sided machine for bonding the pre-printed paper and see pit paper, characterized in that: the double-sided machine comprises a front hot plate conveying part and a rear conveying part, a breathable heating transition section is arranged between the front hot plate conveying part and the rear conveying part, the breathable heating transition section is provided with a breathable heating channel, a heat source is arranged on the upper side and / or lower side of the breathable heating channel, a roller for preventing scratching of the printed layer on the outer surface of the pre-printed paper is arranged on the upper side of the breathable heating channel, the roller is provided with a plurality of rollers, and the rollers are arranged to form a breathable gap between the rollers.

[0014] The pre-printed paper and see pit paper conveying section comprises a pre-printed paper frame, a pre-printed paper conveying section, a bottom paper passing frame, and a see pit paper conveying section, the output end of the see pit paper forming part is connected to the bottom paper passing frame, the bottom paper passing frame is located below the pre-printed paper frame, the see pit paper conveying section is arranged between the bottom paper passing frame and the front hot plate conveying part, and the see pit paper conveying section is provided with a correction machine, a see pit paper tensioning machine, a see pit paper heating device, and a paste attaching machine; the pre-printed paper conveying section is arranged between the pre-printed paper frame and the rear conveying part, and the pre-printed paper conveying section is provided with a pre-printed paper tensioning machine and a pre-printed paper heating device; the pre-printed paper conveying section is located above the see pit paper conveying section.

[0015] When the pre-printed paper and see pit paper on the pre-printed paper frame enter the double-sided machine, the printed layer of the pre-printed paper faces upwards and moves synchronously with the front hot plate conveying part, the roller, and the rear conveying part to prevent scratching.

[0016] The purpose of the present application can also be solved by the following technical measures:

[0017] As a more specific scheme, the deviation rectifying machine comprises two left and right deviation rectifying machine side plates, a first paper guide roller at the inlet end, a second paper guide roller at the inlet end, a grid support platform, and two left and right sets of baffle plates. The first paper guide roller and the second paper guide roller are arranged side by side at the front end between the two left and right deviation rectifying machine side plates. The outlet end paper guide roller is arranged at the rear end between the two left and right deviation rectifying machine side plates. The grid support platform is arranged on the side plate and between the second paper guide roller at the inlet end and the paper guide roller at the outlet end. The suction hood is arranged at the bottom of the grid support platform and is connected with the suction pipe. The two left and right sets of baffle plates are respectively arranged on the left and right ends of the grid support platform and are respectively driven by servo motors. The grid support platform has apertures. The suction hood is arranged below the support platform. The paper guide roller at the inlet end and the paper guide roller at the outlet end are arranged at the front and rear ends of the support platform. The paper with pits passes around the paper guide roller at the inlet end and the paper guide roller at the outlet end and is conveyed through the surface of the grid support platform. The left and right baffle plates are pushed and blocked to move the paper with pits in a flat state to the left and right to align with the paper being referenced, thereby improving the quality of the subsequent processed paperboard.

[0018] As a further scheme, the paste attaching machine comprises a paste attaching machine rack and a sizing mechanism, an input end paper guide roller, an output end paper guide roller, and a paper with pits heating plate. The input end paper guide roller and the output end paper guide roller are respectively arranged at the front and rear ends below the sizing mechanism. The paper with pits heating plate is located between the input end paper guide roller and the output end paper guide roller. The corrugated surface of the paper with pits heating plate passes around the input end paper guide roller, the paper with pits heating plate, and the output end paper guide roller and then enters the sizing mechanism. The paper with pits heating plate can preheat the paper with pits, which is conducive to sizing the pit surface.

[0019] As a further scheme, the paper with pits tensioning machine comprises two left and right support plates, a first friction roller, a first pneumatic brake device, and a first paper guide roller. The first friction roller and the first paper guide roller are arranged between the two support plates. The first pneumatic brake device is arranged on one support plate and is used to brake the first friction roller. The corrugated surface of the paper with pits is arranged away from the first friction roller and then passes through the first paper guide roller. The pre-printing paper tensioning machine comprises two left and right vertical plates, a second friction roller, a second pneumatic brake device, an input end paper guide roller, an intermediate paper guide roller, and an output end paper guide roller. The second friction roller, the input end paper guide roller, the intermediate paper guide roller, and the output end paper guide roller are arranged between the two vertical plates. The second pneumatic brake device is arranged on one vertical plate and is used to brake the second friction roller. The input end paper guide roller, the intermediate paper guide roller, and the output end paper guide roller are all located below the second friction roller and are respectively distributed in front, middle, and rear positions. By arranging a brake device on the friction roller, when the paper conveyed thereon is too loose, the brake of the friction roller can be controlled to achieve tension adjustment, thereby improving the quality of paperboard production. The pneumatic brake device has a corresponding high speed and is more reliable in work.

[0020] As a further scheme, the front and rear conveying sections are both powered and move synchronously at the same speed; the air-permeable heating transition section comprises a support frame, the air-permeable heating channel is arranged on the support frame, and the rollers are rotatably arranged on the support frame and arranged transversely; the support frame further comprises movable support members and a lifting driving mechanism, the rollers are rotatably arranged on the movable support members, the movable support members are movably arranged on the support frame and connected to the support frame through the lifting driving mechanism, the position of the movable support members is adjusted through the lifting driving mechanism, and the distance between the rollers and the lower side of the air-permeable heating channel is adjusted.

[0021] As a further scheme, the front conveying section comprises a heat plate section support, a front paper conveying channel is arranged on the heat plate section support, upper and lower heat plate sections are arranged on the upper and lower sides of the front paper conveying channel respectively, a conveying belt heating body is arranged on at least the inlet end of the front paper conveying channel, the heat plate section conveying belt is heated before entering the front paper conveying channel, and the paperboard entering the front paper conveying channel can be heated as soon as possible; and an upper heat plate is further arranged on the upper side of the front paper conveying channel, and the upper heat plate is arranged on the side of the heat plate section conveying belt away from the front paper conveying channel.

[0022] As a further scheme, the rear conveying section comprises an output section support, an output conveying belt, and driven rollers, the output conveying belt and the driven rollers are arranged on the output section support in an up-down manner respectively, the rear paper conveying channel is formed between the output conveying belt and the driven rollers, and the driven rollers are provided in a plurality of pieces, each of the driven rollers is arranged transversely and rotatably connected to the output section support.

[0023] As a further scheme, the outlet end of the double-sided machine further comprises a paperboard slitting section and a paper stacking section in sequence.

[0024] As a further scheme, the paper stacking section comprises a stacking machine, a frame located at the end of the stacking machine, a paper blocking plate, and a paper storage table, a travelling crane moving forward and backward is arranged on the frame, a lifting driving device for controlling the lifting movement of the paper storage table is arranged on the frame, the paper blocking plate is located in the frame and connected to the travelling crane in a transmission manner, the paper storage table is located in the frame and connected to the lifting driving device in a transmission manner, and a recess is arranged on the mounting reference surface of the lower end of the frame corresponding to the paper storage table. The recess is arranged on the lower mounting reference surface of the paper storage table, the supporting surface of the paper storage table can be lowered to be flush with the mounting reference surface, which is conducive to the entry of an automatic logistics distribution vehicle (AGV vehicle) into the paper storage table; when a specific supporting frame is placed on the paper storage table to receive paperboard, the AGV vehicle can enter the paper storage table to automatically transport the supporting frame and the paperboard thereon to a specific position, thereby realizing automatic production and distribution.

[0025] The application discloses a low-loss and environment-friendly pre-printed paperboard upward production line production process, characterized in that: a pre-printed paper frame and a pre-printed paper conveying section are arranged close to an entrance end of a double-sided machine, pre-printed paper entering the entrance end of the double-sided machine is located above a valley paper and the printing layer of the pre-printed paper faces upward, the pre-printed paper and the printing layer thereof move synchronously with moving parts of the double-sided machine to prevent scratching, in addition, the valley paper is fed into the entrance end of the double-sided machine after being coated with a corrugated surface; the double-sided machine adopts segmented heating, rapid double-sided heating is performed on the front part of the double-sided machine to improve the bonding speed of the pre-printed paper and the valley paper, then the double-sided machine is a breathable heating transition section in the middle part, which can perform heating and continue to strengthen the bonding of the pre-printed paper and the valley paper, and meanwhile, the breathable heating transition section can accelerate drying to stabilize the bonding of the pre-printed paper and the valley paper, and finally, the rear part of the double-sided machine is a rear conveying section which continues to provide power output for the corrugated paperboard.

[0026] The application has the following beneficial effects:

[0027] (1) The corrugated paperboard production line of the application arranges the pre-printed paper frame close to the entrance end of the double-sided machine to reduce waste of the pre-printed paper, and at the same time, the printing layer of the pre-printed paper faces upward, so that the printing layer can move synchronously with the conveying parts of the double-sided machine to avoid abrasion, thereby reducing loss caused by scratching;

[0028] (2) The corrugated paperboard production line of the application does not cause abrasion to the printing layer of the pre-printed paper, so that water-based ink printing pre-printed paper with low cost, beautiful printing texture and no release of volatile harmful substances in the printing process can be adopted to form corrugated paperboard with a water-based ink printing layer, so as to promote the development of the carton packaging industry, and the production process of the paperboard is more environmentally friendly;

[0029] (3) In the corrugated paperboard production line of the application, the upper heating device is arranged on the transmission belt of the double-sided machine heat plate part, combined with the lower heat plate below the transmission belt, to realize double-sided heating in the conveying interval, the heat transfer effect is good, the paste drying speed is improved, the bonding quality of each layer of paperboard is improved, and the corrugated paperboard connected therewith is beneficial to speed up;

[0030] (4) The upper heating device (upper heat plate) of the double-sided machine heat plate part in the corrugated paperboard production line of the application can swing relative to the pressing plate mechanism, so as to avoid crushing the paperboard, and the upper heat plate can be lifted and lowered under the control of the pressing plate mechanism to meet the processing needs of paperboards with different thicknesses;

[0031] (5) The double-sided machine heat plate part in the corrugated paperboard production line of the application can control the upper and lower movement of the heat plate to press on the upper part of the paperboard (such as the transmission belt above the paperboard) to heat and press the upper part of the paperboard, thereby improving the quality and efficiency of the bonding of the paperboard;

[0032] (6) In the corrugated cardboard production line of the present invention, the upper hot plate of the double-facer hot plate section is connected to the telescopic drive device through the rocker arm assembly. One end of the rocker arm of the rocker arm assembly is supported by the crossbeam, which makes it easier and more energy-efficient for the telescopic drive device to lift the hot plate.

[0033] (7) In the corrugated cardboard production line of the present invention, the upper heating plate of the double-facer heating plate section and the other end of the rocker arm are connected by a hinge to achieve swing cooperation, and the angle can be automatically adjusted to avoid damaging the cardboard and further ensure the quality of the cardboard. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the corrugated paper forming part in this invention.

[0035] Figure 2 This is a schematic diagram of the pre-printed paper and corrugated paper conveying section in this invention.

[0036] Figure 3 This is a schematic diagram of the double-sided machine structure of the present invention.

[0037] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0038] Figure 5 This is a schematic diagram of the cardboard segmentation structure in this invention.

[0039] Figure 6 This is a schematic diagram of the paper output stacking section structure in this invention.

[0040] Figure 7 This is a schematic diagram illustrating the heating principle at the front end of the paper feeding channel in the duplexer of the present invention.

[0041] Figure 8 This is a schematic diagram of the heating principle of the air-permeable heating transition section in the double-sided machine of the present invention.

[0042] Figure 9 This is a schematic diagram of the main structure of the double-sided machine (partial cross-section of the breathable heating transition section) in this invention.

[0043] Figure 10 This is a schematic diagram of the three-dimensional structure of the double-sided machine in this invention.

[0044] Figure 11 This is a schematic diagram of the three-dimensional structure of the double-sided machine after partial cross-section in this invention.

[0045] Figure 12 for Figure 11 Enlarged structural diagram at point B.

[0046] Figure 13 for Figure 11 Enlarged structural diagram at point C.

[0047] Figure 14 Fig. 2 is a schematic view of the structure of the paper sheet tensioner according to the present application. Figure 13 Fig. 3 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0048] Figure 15 Fig. 4 is a schematic view of the structure of the paper sheet tensioner according to the present application. Figure 14 Fig. 5 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0049] Figure 16 Fig. 6 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0050] Figure 17 Fig. 7 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0051] Figure 18 Fig. 8 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0052] Figure 19 Fig. 9 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0053] Figure 20 Fig. 10 is a schematic view of the structure of the paper sheet tensioner according to the present application. Figure 19 Fig. 11 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0054] Figure 21 Fig. 12 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0055] Figure 22 Fig. 13 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0056] Figure 23 Fig. 14 is a schematic view of the structure of the paper sheet tensioner according to the present application. Figure 22 Fig. 15 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0057] Figure 24 Fig. 16 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0058] Figure 25 Fig. 17 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0059] Figure 26 Fig. 18 is a schematic view of the structure of the paper sheet tensioner according to the present application. Figure 25 Fig. 19 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0060] Figure 27 Fig. 20 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0061] Figure 28 Fig. 21 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0062] Figure 29 Fig. 22 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0063] Fig. 23 is a schematic view of the structure of the paper sheet tensioner according to the present application.

[0064] 10 is a front hot plate conveying part, 101 is a front paper conveying channel, 102 is a hot plate part conveying belt, 103 is an arc-shaped hot plate, 104 is an upper hot plate, 105 is a lower hot plate, 106 is a hot plate part support, 107 is an inlet end, 108 is a preheating arc-shaped plate for pit paper, 109 is a pressing plate mechanism; 20 is a breathable heating transition section, 201 is a breathable heating channel, 202 is a transition section hot plate, 203 is a support frame, 204 is a supporting block, 205 is a supporting beam, 1 is a heating roller, 11 is a breathable gap, 2 is a hydraulic cylinder, 21 is a piston rod, 3 is a supporting rod, 31 is an upper inclined surface, 32 is a guide sleeve, 33 is a guide rod, 4 is a supporting arm, 41 is a mounting disc, 42 is a limiting screw, 43 is a cushion block, 44 is an adjusting screw, 45 is a boss, 46 is a locking screw, 47 is an elongated hole; 30 is a rear conveying part, 301 is a rear paper conveying channel, 302 is a driven roller; 40 is pit paper; 50 is pre-printed paper, 501 is a printing layer; 60 is a pit paper forming part, 601 is a first raw paper frame, 602 is a corrugating machine, 8 is a paste attaching machine frame, 81 is a sizing roller, 82 is a swing arm, 83 is a pressing roller, 84 is a movable paper guide roller, 85 is an output end paper guide roller, 86 is a sizing hopper, 87 is a sizing receiving disc, 88 is a sizing control roller, 89 is an input end paper guide roller, 810 is a pit paper heating plate; 603 is a second raw paper frame, 604 is a traction machine, 605 is a bottom paper passing frame, 606 is a correcting machine, 5 is a correcting machine side plate, 51 is a first paper guide roller at an inlet end, 52 is a second paper guide roller at the inlet end, 53 is a first baffle, 531 is a first nut, 532 is a first adjusting screw rod, 54 is an outlet end paper guide roller, 55 is a grating support, 56 is a second baffle, 561 is a second nut, 562 is a second adjusting screw rod, 57 is a suction pipe, 571 is a suction cover, 58 is a linear guide rail, 59 is a sliding block; 607 is a pit paper tensioning machine, 6 is a supporting plate, 61 is a first friction roller, 62 is a paper passing power motor, 63 is a first pneumatic brake device, 64 is a first paper guide roller; 608 is a pit paper heating cylinder, 609 is a paste attaching machine; 70 is a pre-printed paper frame, 701 is a pre-printed paper tensioning machine, 7 is a vertical plate, 71 is a second friction roller, 72 is a second pneumatic brake device, 73 is a middle paper guide roller, 74 is an outlet end paper guide roller, 75 is an inlet end paper guide roller, 76 is a bottom beam, 702 is a pre-printed paper heating cylinder, 703 is a pre-printed paper heating plate; 80 is a longitudinal cutting machine; 90 is a transverse cutting machine; 100 is a double-sided machine; 110 is a stacking machine, 1101 is a paper blocking plate, 1102 is a paper storage table, 1103 is a concave pit, 1104 is a travelling crane, 1105 is a lifting driving device, 1106 is a frame, 1107 is a connecting arm. DETAILED DESCRIPTION

[0065] The application will be further described below in conjunction with the drawings and examples.

[0066] Reference Figures 1 to 4As shown in the drawings, a low-loss environmentally friendly pre-printed paperboard upward production line comprises a flute paper forming part 60, a pre-printed paper and flute paper conveying section, and a double-sided machine 100 for bonding the pre-printed paper 50 and the flute paper 40, wherein the double-sided machine 100 comprises a front hot plate conveying part 10 and a rear conveying part 30, and a breathable heating transition section 20 is arranged between the front hot plate conveying part 10 and the rear conveying part 30, the breathable heating transition section 20 is provided with a breathable heating channel 201, the upper side and the lower side of the breathable heating channel 201 are provided with heat sources, the upper side of the breathable heating channel 201 is provided with a cylinder for preventing scratching of the printing layer 501 on the outer surface of the pre-printed paper 50, and the cylinder is provided with a plurality of cylinders, and the cylinders and the cylinders form a breathable gap 11.

[0067] The pre-printed paper and flute paper conveying section comprises a pre-printed paper rack 70, a pre-printed paper 50 conveying section, a bottom paper passing rack 605, and a flute paper 40 conveying section, the output end of the flute paper forming part 60 is connected to the bottom paper passing rack 605, the bottom paper passing rack 605 is located below the pre-printed paper rack 70, the flute paper 40 conveying section is arranged between the bottom paper passing rack 605 and the front hot plate conveying part 10, and the flute paper 40 conveying section is provided with a correction machine 606, a flute paper tensioning machine 607, a flute paper heating device (flute paper hot cylinder 608), and a paste attaching machine 609; the pre-printed paper 50 conveying section is arranged between the pre-printed paper rack 70 and the rear conveying part 30, and is provided with a pre-printed paper tensioning machine 701 and a pre-printed paper heating device (pre-printed paper hot cylinder 702 and pre-printed paper hot plate 703); the pre-printed paper 50 conveying section is located above the flute paper 40 conveying section; when the pre-printed paper 50 and the flute paper 40 on the pre-printed paper rack 70 enter the double-sided machine 100, the printing layer 501 of the pre-printed paper 50 faces upward and moves synchronously with the front hot plate conveying part 10, the cylinder, and the rear conveying part 30 to prevent scratching.

[0068] The flute paper forming part 60 comprises a corrugator 602, a first raw paper rack 601, a second raw paper rack 603, and a traction machine 604, the first raw paper rack 601 and the second raw paper rack 603 are respectively arranged at the front and rear ends of the corrugator 602, and the traction machine 604 is located above the corrugator 602.

[0069] As shown in the drawings, Figure 16 and Figure 17 The correction machine 606 comprises two left and right correction machine side plates 5 and two sets of baffles, the front and rear ends of the two left and right correction machine side plates 5 are respectively provided with an inlet paper guide roller and an outlet paper guide roller, a grid support 55 is arranged between the inlet paper guide roller and the outlet paper guide roller 54, the two sets of baffles are respectively and movably arranged on the left and right ends of the grid support 55 and are respectively connected to a motor through a corresponding screw transmission pair, and the bottom of the grid support 55 is provided with an air suction cover 571.

[0070] The input end paper guide roller comprises an input end first paper guide roller 51 and an input end second paper guide roller 52 arranged side by side. After the pit paper 40 passes through the input end first paper guide roller 51 and the input end second paper guide roller 52, the pit surface faces upward and enters the grid support 55, and then passes through the output end paper guide roller 54 for output.

[0071] The left and right sets of baffles are respectively a first baffle 53 and a second baffle 56. The left and right sides of the left and right two deviation rectifying machine side plates 5 correspond to the first baffle 53 and the second baffle 56 respectively, and are provided with a first adjusting screw rod 532 and a second adjusting screw rod 562. The first adjusting screw rod 532 is in transmission connection with a first motor, the first baffle 53 is in threaded connection with the first adjusting screw rod 532 through a first nut 531, the second adjusting screw rod 562 is in transmission connection with a second motor, and the second baffle 56 is in threaded connection with the second adjusting screw rod 562 through a second nut 561.

[0072] The first motor and the second motor are both servo motors.

[0073] The left and right two deviation rectifying machine side plates 5 are provided with a linear guide rail 58 pointing left and right. The first baffle 53 and the second baffle 56 are respectively in sliding connection with the linear guide rail 58 through a sliding block 59.

[0074] The air suction cover 571 is connected with the air suction pipe 57, and the air suction pipe 57 extends out of the deviation rectifying machine side plate 5.

[0075] In combination Figures 24 to 26 As shown, the paste attaching machine 609 comprises a paste attaching machine frame 8 and a sizing mechanism. The sizing mechanism is arranged on the paste attaching machine frame 8. The paste attaching machine frame 8 is further provided with an input end paper guide roller 89, an output end paper guide roller 85 and a pit paper heating plate 810. The input end paper guide roller 89 and the output end paper guide roller 85 are respectively arranged at the front and rear ends below the sizing mechanism. The pit paper heating plate 810 is located between the input end paper guide roller 89 and the output end paper guide roller 85.

[0076] The sizing mechanism comprises a sizing bucket 86, a sizing roller 88, a sizing roller 81 and a pressing roller 83. The sizing roller 88 is used for transferring the sizing paste in the sizing bucket 86 to the outer circumferential surface of the sizing roller 81. The pressing roller 83 is located beside the sizing roller 81 and above the output end paper guide roller 85.

[0077] The paste attaching machine frame 8 is further provided with a swing arm 82 and a movable paper guide roller 84. The movable paper guide roller 84 is located between the pressing roller 83 and the output end paper guide roller 85. The lower end of the swing arm 82 is connected with the movable paper guide roller 84. The upper end of the swing arm 82 is swingably connected with the paste attaching machine frame 8. The movable paper guide roller 84 and the sizing roller 81 form a paper passing gap therebetween.

[0078] The sizing bucket 86 is open at the top. The sizing roller 88 is located beside the open end of the sizing bucket 86. The open end of the sizing bucket 86 is provided with a sizing scraping plate. The sizing scraping plate is in contact with the outer circumferential surface of the sizing roller 88.

[0079] The paste adhering machine frame 8 is provided with a slurry receiving disc 87 below the slurry control roller 88 and the scraper.

[0080] The embossed paper heating plate 810 is an arc-shaped heating plate. The embossed paper heating plate 810 heats the embossed surface of the embossed paper 40 through the convex arc surface thereof, which faces downward.

[0081] As a further scheme of the paste adhering machine, in combination with Figure 27 The convex arc surface of the arc-shaped heating plate faces upward.

[0082] In combination with Figures 18 to 20 As shown in the figure, the embossed paper tensioning machine 607 comprises left and right two support plates 6, a first friction roller 61, a first pneumatic brake device 63 and a first paper guide roller 64. The first friction roller 61 and the first paper guide roller 64 are arranged between the two support plates 6. The first pneumatic brake device 63 is arranged on one support plate 6 and is used for braking the first friction roller 61. The corrugated surface of the embossed paper 40 faces away from the first friction roller 61, and then is wound out through the first paper guide roller 64. A paper feeding power motor 62 is further arranged on one support plate 6. The paper feeding power motor 62 is in transmission connection with the first friction roller 61 through a clutch. When paper feeding is needed, the paper feeding power motor 62 is in transmission with the first friction roller 61 so as to facilitate paper feeding.

[0083] In combination with Figures 21 to 23 As shown in the figure, the pre-printed paper tensioning machine 701 comprises left and right two vertical plates 7, a second friction roller 71, a second pneumatic brake device 72, a paper feeding end paper guide roller 75, a middle paper guide roller 73 and a paper discharging end paper guide roller 74. The second friction roller 71, the paper feeding end paper guide roller 75, the middle paper guide roller 73 and the paper discharging end paper guide roller 74 are arranged between the two vertical plates 7. The second pneumatic brake device 72 is arranged on one vertical plate 7 and is used for braking the second friction roller 71. The paper feeding end paper guide roller 75, the middle paper guide roller 73 and the paper discharging end paper guide roller 74 are all located below the second friction roller 71 and are distributed in front, middle and rear positions respectively. The bottom of the vertical plate 7 is provided with a bottom beam 76.

[0084] In combination with Figures 7 to 15 As shown in the figure, a heat source is arranged on the roller to form a heating roller 1. The heat source is a steam pipe, which is in communication with the inside of the roller. A control valve is connected to the steam pipe. Temperature adjustment is realized by adjusting the control valve. When the control valve is closed, the heating function of the roller is closed.

[0085] The front heating plate conveying part 10 and the rear conveying part 30 are both powered and move synchronously at the same speed.

[0086] The air-permeable heating transition section 20 comprises a support frame 203, the air-permeable heating channel 201 is arranged on the support frame 203, and the roller is arranged in rotation on the support frame 203, and each roller is arranged transversely.

[0087] The support frame 203 further comprises a movable support and a lifting driving mechanism, the roller is arranged in rotation on the movable support, the movable support is arranged in up-and-down movement on the support frame 203 and is connected with the support frame 203 through the lifting driving mechanism, the position of the movable support is adjusted through the lifting driving mechanism, and the distance between the roller and the lower side of the air-permeable heating channel 201 is adjusted.

[0088] The movable support comprises a support beam 205, a support arm 4 and a supporting rod 3, the support beam 205 is arranged on the support frame 203, the support arm 4 is arranged in rotation with the support beam 205, the roller is arranged in rotation at the lower end of the support arm 4, the supporting rod 3 is arranged in up-and-down movement on the support frame 203, the lower end of the support arm 4 is supported on the supporting rod 3, and the supporting rod 3 is in transmission connection with the lifting driving mechanism.

[0089] The support frame 203 is provided with a supporting block 204, the top surface of the supporting block 204 is provided with a lower inclined surface, the supporting rod 3 is provided with an upper inclined surface 31, the upper inclined surface 31 is supported on the lower inclined surface of the supporting block 204, and the lifting driving mechanism comprises a hydraulic cylinder 2, and the piston rod 21 of the hydraulic cylinder 2 is in transmission connection with the supporting rod 3.

[0090] The supporting rod 3 is provided with a guide sleeve 32 which is directed upward and downward, the guide sleeve 32 is provided with a guide rod 33 which is in sliding connection with the guide sleeve 32 upward and downward, and the piston rod 21 of the hydraulic cylinder 2 is connected with the guide rod 33.

[0091] The support arm 4 is in the shape of a curved arm, and the heating roller 1 is connected with the support arm 4 at both ends.

[0092] The support arm 4 is in the shape of a curved arm, and the heating roller 1 is connected with the support arm 4 at both ends.

[0093] The support arm 4 is in the shape of a curved arm, and the heating roller 1 is connected with the support arm 4 at both ends.

[0094] The mounting disc 41 is provided with two limiting screws 42 in front and back of the surface corresponding to the horizontal plane where the center line is located, and the connecting hole is arranged below the two limiting screws 42; the front surface of the cushion block 43 is in an inverted "convex" shape structure, the front and back ends of the cushion block 43 are respectively provided with the screw hole below the limiting screw 42, and the bottom of the cushion block 43 is provided with a boss 45, the bottom surface of the boss 45 is in a circular arc shape and is supported on the top surface of the supporting rod 3.

[0095] The lower side of the air-permeable heating channel 201 is provided with a heat source, which is a transition section heat plate 202. The transition section heat plate 202 is a steam heating plate or an electromagnetic heating plate.

[0096] The front heat plate conveying part 10 comprises a heat plate part support 106, the heat plate part support 106 is provided with a front paper conveying channel 101, the upper and lower sides of the front paper conveying channel 101 are respectively provided with a heat plate part conveying belt 102 and a lower heat plate 105, the heat plate part conveying belt 102 is provided with a conveying belt heating body at least near the inlet end 107 of the front paper conveying channel 101, and the heat plate part conveying belt 102 is heated before entering the front paper conveying channel 101, so that the paperboard entering the front paper conveying channel 101 can be heated as soon as possible.

[0097] The conveying belt heating body is an arc-shaped heat plate 103, which is arranged outside the heat plate part conveying belt 102 and in contact with the surface of the heat plate part conveying belt 102.

[0098] The upper side of the front paper conveying channel 101 is also provided with an upper heat plate 104, which is arranged on the side of the heat plate part conveying belt 102 away from the front paper conveying channel 101.

[0099] The upper heat plate 104 is connected with the heat plate part support 106 through a pressing plate mechanism 109, and the pressing plate mechanism 109 is used for adjusting the height position of the upper heat plate 104.

[0100] The heat plate part support 106 is provided with a plurality of roller bodies above the front paper conveying channel 101, one of which is a power roller, and the heat plate part conveying belt 102 is wound outside the roller body.

[0101] The heat plate part support 106 is provided with a notch paper preheating arc-shaped plate 108 outside and below the inlet end 107 of the front paper conveying channel 101.

[0102] The rear conveying part 30 comprises an output section support, an output conveying belt and a driven roller 302, the output conveying belt and the driven roller 302 are arranged above and below the output section support respectively, the rear paper conveying channel 301 is formed between the output conveying belt and the driven roller 302, and the driven roller 302 is provided with a plurality of driven rollers 302, each of which is transversely arranged and rotationally matched with the output section support.

[0103] The working principle of the double-sided printing machine is as follows: Taking the bonding of pre-printed paper 50 and corrugated paper 40 as an example, after the corrugated paper 40 is sized, the paper is bonded with the corrugated paper 40 at the bottom and the pre-printed paper 50 at the top (the printing layer 501 of the pre-printed paper 50 faces upwards). Figure 3 The direction of arrow I in the middle leads from the inlet end 107 into the front paper feeding channel 101. Combined with... Figure 7 As shown, since the arc-shaped hot plate 103 heats the hot plate conveyor belt 102 near the inlet end 107 (see arrow H1), it ensures that the hot plate conveyor belt 102 entering the inlet end 107 can heat the pre-printed paper 50 immediately. In addition, a preheating arc-shaped plate 108 for corrugated paper is provided on the lower outer side of the inlet end 107, so that the corrugated paper 40 entering the front paper feeding channel 101 can be preheated. After the pre-printed paper 50 and the corrugated paper 40 enter the front paper feeding channel 101, their upper and lower sides are heated by the upper hot plate 104 and the lower hot plate 105 respectively (see arrows H3 and H2), so that the paste between the pre-printed paper 50 and the corrugated paper 40 is cooked, and the pre-printed paper 50 and the corrugated paper 40 are initially bonded. Then, combined Figure 8 As shown, the pre-printed paper 50 and corrugated paper 40, after initial bonding, enter the ventilated heating channel 201. Their upper and lower sides are heated on both sides by the heating rollers 1 and the transition section heating plate 202 (see arrows H5 and H4), further enhancing the bonding effect between the pre-printed paper 50 and the corrugated paper 40. Simultaneously, since the heating rollers 1 are rolling, they only roll in contact with the printed layer 501 of the pre-printed paper 50, without scratching the printed layer 501. Furthermore, the gaps between the heating rollers 1 facilitate ventilation (see arrow W), increasing the drying speed of the paste after steaming, thus ensuring stable bonding between the pre-printed paper 50 and the corrugated paper 40, forming corrugated cardboard. Finally, the corrugated cardboard enters the rear paper feeding channel 301 of the rear conveyor section 30 and travels along... Figure 3 The middle O-shaped arrow sends the device to the next workstation.

[0104] Combination Figure 5 and Figure 6 As shown, the double-sided machine 100 is further equipped with a cardboard slitting section and a paper stacking section at its outlet end. The cardboard slitting section includes a longitudinal slitter 80 and a transverse slitter 90. See also... Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 P1 and P1, P2 and P2, P3 and P3, and P4 and P4 are connected respectively, forming a production line with corrugated paper forming, pre-printed paper and corrugated paper conveying, pre-printed paper and corrugated paper bonding to form corrugated paper, longitudinal cutting of corrugated board, transverse cutting of corrugated board, and output of corrugated board stacking points. In the figure, arrow Z1 indicates the direction of corrugated paper conveying after forming, Z2 indicates the direction of corrugated paper conveying after correction, arrow Z3 indicates the direction of pre-printed paper conveying, and arrow Z4 indicates the direction of corrugated board conveying.

[0105] Combining Figure 28 and Figure 29 As shown in the figure, the paper stacking section includes a stacking machine 110 and a paper storage table 1102, the paper storage table 1102 is arranged at the end of the stacking machine 110, a pit 1103 is arranged on the installation reference surface L (such as the ground) of the stacking machine 110 corresponding to the paper storage table 1102, and the paper storage table 1102 is seated in the pit 1103, so as to facilitate the logistics distribution device to receive the paperboard on the paper storage table 1102.

[0106] The end of the stacking machine 110 is also provided with a frame 1106 and a paper blocking plate 1101, the frame 1106 is provided with a traveling crane 1104 moving forward and backward and a lifting driving device 1105 for controlling the lifting movement (see the H arrow in the figure) of the paper storage table 1102, the paper blocking plate 1101 is located in the frame 1106 and is in transmission connection with the traveling crane 1104, and the paper storage table 1102 is located in the frame 1106 and is in transmission connection with the lifting driving device 1105. Figure 6

[0107] The four corner positions of the paper storage table 1102 are in transmission connection with the lifting driving device 1105 through chains or cables.

[0108] The four corner positions of the paper storage table 1102 are connected with the chains or cables through connecting arms 1107.

[0109] A low-waste and environmentally friendly pre-printed paperboard production line production process, the pre-printed paper frame 70 and the pre-printed paper 50 conveying section are as close as possible to the inlet end 107 of the double-sided machine 100, the pre-printed paper 50 entering the inlet end 107 of the double-sided machine 100 is located above the valley paper 40 and makes the printing layer 501 of the pre-printed paper 50 upward, so that the pre-printed paper 50 and its printing layer 501 move synchronously with the moving parts of the double-sided machine 100, preventing scratching, in addition, the corrugated surface of the valley paper 40 is sized after being coated and enters the inlet end 107 of the double-sided machine 100; the double-sided machine 100 adopts segmented heating, the front part of the double-sided machine 100 performs rapid double-sided heating to improve the bonding speed of the pre-printed paper 50 and the valley paper 40, then the middle part of the double-sided machine 100 is the air-permeable heating transition section 20, which can not only heat and continue to strengthen the bonding of the pre-printed paper 50 and the valley paper 40, but also can be air-permeable and accelerate drying, so that the bonding paste of the pre-printed paper 50 and the valley paper 40 is dry and stable, and finally the rear part of the double-sided machine 100 is the rear conveying part 30, which continues to provide power output for the corrugated paperboard.​

Claims

1. A low-loss, environmentally friendly pre-printed paperboard production line with the front side facing up, comprising a corrugated paper forming section (60), a pre-printed paper and corrugated paper conveying section, and a double-sided machine (100) for bonding the pre-printed paper (50) and the corrugated paper (40), characterized in that: The double-sided machine (100) includes a front hot plate conveying section (10) and a rear conveying section (30). A breathable heating transition section (20) is provided between the front hot plate conveying section (10) and the rear conveying section (30). A breathable heating transition section (20) is provided with a breathable heating channel (201). A heat source is provided on the upper side of the breathable heating channel (201). A roller is provided on the upper side of the breathable heating channel (201) to prevent scratching the outer surface printing layer (501) of the pre-printed paper (50). The roller is provided with multiple rollers, and a breathable gap (11) is formed between the rollers. Both the front heat plate conveying section (10) and the rear conveying section (30) are powered and move synchronously at the same speed; the breathable heating transition section (20) includes a support frame (203), the breathable heating channel (201) is set on the support frame (203), the rollers are rotatably set on the support frame (203), and each roller is arranged laterally; the support frame (203) also has a movable support member and a lifting drive mechanism, the rollers are rotatably set on the movable support member, the movable support member is movably set on the support frame (203) and connected to the support frame (203) through the lifting drive mechanism, the position of the movable support member is adjusted by the lifting drive mechanism to realize the distance adjustment between the roller and the lower side of the breathable heating channel (201); a heat source is provided on the roller to form a heating roller (1); a heat source is provided on the lower side of the breathable heating channel (201), the heat source is the transition section heat plate (202). The pre-printed paper and corrugated paper conveying section includes a pre-printed paper holder (70), a pre-printed paper conveying section, a bottom paper feeder (605), and a corrugated paper conveying section. The output end of the corrugated paper forming part (60) is connected to the bottom paper feeder (605). The bottom paper feeder (605) is located below the pre-printed paper holder (70). The corrugated paper conveying section is located between the bottom paper feeder (605) and the front hot plate conveying part (10). The corrugated paper conveying section is equipped with a web guiding machine (606), a corrugated paper tensioning machine (607), a corrugated paper (40) heating device, and a gluing machine (609). The pre-printed paper conveying section is located between the pre-printed paper holder (70) and the rear conveying part (30). The pre-printed paper conveying section is equipped with a pre-printed paper tensioning machine (701) and a pre-printed paper heating device. The pre-printed paper conveying section is located above the corrugated paper conveying section. When the pre-printed paper (50) and the corrugated paper (40) on the pre-printed paper holder (70) enter the duplexer (100), the printed layer (501) of the pre-printed paper (50) faces upward and moves synchronously with the front hot plate conveyor (10), the roller and the rear conveyor (30) to prevent scratches. The double-sided machine (100) is also provided with a cardboard slitting section and a paper stacking section at the outlet end.

2. The low-loss, environmentally friendly pre-printed paperboard production line with the upper side facing up according to claim 1, characterized in that: The correction machine (606) includes two side plates (5) of the correction machine, an inlet first guide roller (51), an inlet second guide roller (52), a grid support (55) and two sets of baffles. The inlet first guide roller (51) and the inlet second guide roller (52) are arranged side by side at the front end between the two side plates (5). The outlet guide roller (54) is arranged at the rear end between the two side plates (5). The grid support (55) is arranged on the side plate and located between the inlet second guide roller (52) and the outlet guide roller (54). The suction hood (571) is arranged at the bottom of the grid support (55) and connected to the suction pipe (57). The two sets of baffles are slidably arranged on the left and right ends of the grid support (55) and are driven by servo motors respectively.

3. The low-loss, environmentally friendly pre-printed paperboard production line with the upper side facing up according to claim 1, characterized in that: The gluing machine (609) includes a gluing machine frame (8) and a sizing mechanism, an input guide roller (89), an output guide roller (85), and a corrugated paper heating plate (810). The input guide roller (89) and the output guide roller (85) are respectively located at the front and rear ends below the sizing mechanism. The corrugated paper heating plate (810) is located between the input guide roller (89) and the output guide roller (85). The corrugated paper heating plate (810) passes over the input guide roller (89), the corrugated paper heating plate (810), and the output guide roller (85) with its corrugated surface facing upwards before entering the sizing mechanism.

4. The low-loss, environmentally friendly pre-printed paperboard production line with the upper side facing up according to claim 1, characterized in that: The corrugated paper tensioner (607) includes two support plates (6) on the left and right, a first friction roller (61), a first pneumatic brake device (63) and a first guide roller (64). The first friction roller (61) and the first guide roller (64) are arranged between the two support plates (6). The first pneumatic brake device (63) is arranged on one support plate (6) and is used to brake the first friction roller (61). The corrugated surface of the corrugated paper (40) is wrapped around the first friction roller (61) with the back facing away, and then wrapped around the first guide roller (64). The pre-printed paper tensioner (701) includes two vertical plates (7) on the left and right, a second friction roller (61) and a first friction roller (64). The roller (71), the second pneumatic brake device (72), the paper feed end guide roller (75), the middle paper guide roller (73) and the paper output end guide roller (74), the second friction roller (71), the paper feed end guide roller (75), the middle paper guide roller (73) and the paper output end guide roller (74) are arranged between two vertical plates (7), the second pneumatic brake device (72) is arranged on one vertical plate (7) and is used to brake the second friction roller (71), the paper feed end guide roller (75), the middle paper guide roller (73) and the paper output end guide roller (74) are all located below the second friction roller (71) and are distributed in the front, middle and rear positions respectively.

5. The low-loss, environmentally friendly pre-printed paperboard production line with the upper side facing up according to claim 1, characterized in that: The front hot plate conveying section (10) includes a hot plate support (106), a front paper feeding channel (101) is provided on the hot plate support (106), a hot plate conveyor belt (102) and a lower hot plate (105) are respectively provided on the upper and lower sides of the front paper feeding channel (101), the hot plate conveyor belt (102) is provided with a conveyor belt heating body at least near the entrance end (107) of the front paper feeding channel (101), the hot plate conveyor belt (102) is heated before entering the front paper feeding channel (101), so that the paperboard entering the front paper feeding channel (101) can be heated as soon as possible; an upper hot plate (104) is also provided on the upper side of the front paper feeding channel (101), the upper hot plate (104) is located on the side of the hot plate conveyor belt (102) away from the front paper feeding channel (101).

6. The low-loss, environmentally friendly pre-printed paperboard face-up production line according to claim 1, characterized in that: The rear conveying section (30) includes an output section support, an output conveyor belt, and a driven roller (302). The output conveyor belt and the driven roller (302) are respectively arranged vertically on the output section support. A rear paper feeding channel (301) is formed between the output conveyor belt and the driven roller (302). There are multiple driven rollers (302), and each driven roller (302) is arranged horizontally and rotates with the output section support.

7. The low-loss, environmentally friendly pre-printed paperboard production line with the upper side facing up according to claim 1, characterized in that: The paper output stacking section includes a stacker (110) and a frame (1106), a baffle plate (1101), and a paper storage platform (1102) located at the end of the stacker (110). The frame (1106) is equipped with a traveling trolley (1104) that moves back and forth and a lifting drive device (1105) for controlling the lifting and lowering movement of the paper storage platform (1102). The baffle plate (1101) is located inside the frame (1106) and is connected to the traveling trolley (1104) for transmission. The paper storage platform (1102) is located inside the frame (1106) and is connected to the lifting drive device (1105) for transmission. A recess (1103) is provided on the mounting reference surface at the lower end of the frame (1106) corresponding to the paper storage platform (1102).

8. The production process of the low-loss environmentally friendly pre-printed paperboard face-up production line according to claim 1, characterized in that: The pre-printed paper holder (70) and the pre-printed paper conveyor section are placed as close as possible to the inlet end (107) of the duplexer (100). The pre-printed paper (50) entering the inlet end (107) of the duplexer (100) is positioned above the corrugated paper (40), with the printed layer (501) of the pre-printed paper (50) facing upwards. This ensures that the pre-printed paper (50) and its printed layer (501) move synchronously with the moving parts of the duplexer (100) to prevent scratches. In addition, the corrugated surface of the corrugated paper (40) is sized before entering the inlet end (107) of the duplexer (100). The duplexer (100) adopts... Using segmented heating, the front of the double-sided machine (100) is rapidly heated on both sides to increase the bonding speed between the pre-printed paper (50) and the corrugated paper (40). Then, in the middle of the double-sided machine (100) is the breathable heating transition section (20), which can both heat and further strengthen the bonding between the pre-printed paper (50) and the corrugated paper (40), and at the same time allow air to pass through, accelerating drying, so that the adhesive paste between the pre-printed paper (50) and the corrugated paper (40) is dried and stable. Finally, in the rear of the double-sided machine (100) is the rear conveyor section (30), which continues to provide power output for the corrugated cardboard.

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