Corrugated carton and processing technology thereof

Abstract

The invention discloses a corrugated carton. A corrugated carton strength reinforcing structure is arranged on the corrugated carton. The invention further discloses a processing technology of the corrugated carton. The processing technology comprises the following steps: processing a corrugated board: processing the corrugated base paper and the surface paper into a single-sided corrugated board through a single-sided machine; then the single-face corrugated paper is conveyed into a double-layer gluing machine through a conveying platform bridge, and the two pieces of single-face corrugated paper are bonded through the double-layer gluing machine to form double-layer corrugated paper; line pressing, wherein a longitudinal cutting line pressing machine is adopted for edging to make cutting lines; conveying and stacking are conducted, specifically, the edged corrugated boards are output from the double-layer gluing machine through a paper outlet roller, and then the edged corrugated boards are conveyed to a stacking machine through a conveying belt to be stacked; paperboard folding: folding the corrugated paperboard to form a corrugated carton; the folded corrugated carton is conveyed to a proper position, and the carton is bound and jointed through a carton stapler; carton detection; and stacking the cartons. The strength of the corrugated board is enhanced; and the requirement on the precision of machinery equipment is reduced. And the cost is reduced, and the strength of the corrugated carton is enhanced.

Description

Technical Field

[0001] The invention relates to a corrugated paper box and a processing technology thereof. Background Art

[0002] There are two measures to improve the strength of corrugated boxes. One is to improve the strength of corrugated board, and the other is to improve the strength of the finished corrugated boxes. There are many studies on the latter. For example, Liu Chao’s paper "Measures to Improve the Compressive Strength (or Stacking Strength) of Corrugated Boxes - Partition Design" published in the January 2024 issue of "Guangdong Printing" mentioned: There are many measures to improve the compressive strength (or stacking strength) of corrugated boxes. In terms of structural design, the use of a suitable partition structure is one of the very effective measures. Another example is heavy-duty octagonal corrugated boxes. There are existing technologies such as Zhang Min's paper "Study on the Compressive Strength and Prediction Model of Heavy-Duty Octagonal Corrugated Boxes" published in "Packaging and Food Machinery" Volume 42, Issue 3, June 2024, which also mentioned: Octagonal boxes refer to heavy-duty boxes with an octagonal cross-section shape, which are mainly composed of a frame and upper and lower covers. The load-bearing capacity is above 100kg, and the maximum can reach 3t. Compared with traditional wooden boxes, octagonal boxes have the advantages of low price, high recycling rate, light weight, high strength, convenient printing, beautiful appearance, small stacking space, low transportation cost, easy assembly, disassembly and handling, green and easy recycling, etc. Therefore, they are widely used in the packaging industry, especially in the transportation packaging of bulk goods. The patent with publication number CN117077317A also mentioned: The octagonal carton is a heavy-duty carton with a special structure and strong load-bearing capacity, which is widely used in the fields of chemical raw materials, mechanical parts, fruits and vegetables. There are few existing technologies for the research on strengthening the strength of corrugated cardboard. Corrugated cardboard is produced by a corrugated line (corrugated cardboard production line). The corrugated base paper passes through a group of corrugated rollers under high heat and pressure to press out wave patterns, forming a corrugated paper with certain strength and buffering capacity. The pressure roller applies appropriate pressure to make the face paper and the core paper contact, and corn starch-based glue is applied to the rubber roller. The rubber roller and the calibration roller rotate to control the amount of glue applied to the flute peaks of the corrugated base paper; the face paper base paper and the corrugated base paper are sent to the single-sided machine from opposite sides through a pair of roller frames, and connected by a paper splicer. After the heating roller (heats the paper to an appropriate temperature for corrugated processing), the conveyor bridge transports the single-sided corrugated paper to the double-sided machine, and then passes through the paper cutting system, longitudinal cutting and creasing machine, paper discharge roller, conveyor belt, and stacker in sequence to form a corrugated cardboard product. The corrugated core paper in corrugated cardboard is generally made of shorter fibers from hardwood trees, and the surface paper is generally made of long fibers from softwood trees to ensure the strength of the formed corrugated cardboard; therefore, the existing technology ensures the strength of the corrugated cardboard through the existing structure of the corrugated cardboard (the middle corrugated core paper and the surface paper are bonded to form a triangular stable structure) and the combination of the selection of the core paper and the surface paper and the comprehensive cost. There is still room for improvement in comprehensive cost and strengthening the strength of corrugated boxes. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects existing in the prior art and provide a corrugated paper box and its processing technology. Two pieces of single-faced corrugated paper are combined into double-layer corrugated paper, which can reduce the requirements for corrugated base paper, because the middle corrugated core paper has higher requirements and is generally made of shorter fibers of hardwood trees. After the process is improved, even the raw material of the surface paper, that is, the long fibers of softwood trees, can be used, because the two layers of corrugated core paper are spliced ​​in the same direction to form the final middle core paper; the improvement of the process reduces the requirements for the raw materials of the base paper and achieves a good balance between the comprehensive cost and the strengthening of the strength of the corrugated paper box.

[0004] To achieve the above purpose, the technical solution of the present invention is to design a corrugated paper box, on which a corrugated paper box strength reinforcement structure is provided. The provision of the strength reinforcement structure strengthens the strength of the corrugated paper box.

[0005] A further technical solution is that the strength enhancement structure includes: the corrugated board of the corrugated box is a double-layer corrugated paper composed of two single-sided corrugated papers, the flutes of the two single-sided corrugated papers are staggered, and the flute peak of one single-sided corrugated paper is inserted into the flute valley of the other single-sided corrugated paper.

[0006] A further technical solution is that the single-faced corrugated paper is formed by gluing a layer of corrugated core paper and a layer of face paper; the corrugated core paper is processed by corrugating corrugated base paper; the corrugated base paper and the face paper are both made of long fibers of cork trees. Two pieces of single-faced corrugated paper are combined into double-layer corrugated paper, which can reduce the requirements for corrugated base paper, because the middle corrugated core paper has higher requirements and is generally made of shorter fibers of hardwood trees. After the process is improved, even the raw material of the face paper, that is, the long fibers of cork trees, can be used, because the two layers of corrugated core paper are spliced ​​in the same direction to form the final middle core paper; the raw material requirements for the base paper are reduced through process improvements.

[0007] A further technical solution is that the slopes of the peak sides of the two layers of single-faced corrugated paper are different. The slopes of the peak sides of the two layers of single-faced corrugated paper are different, and the slope of the side of the flute peak of one layer of single-faced corrugated paper is larger. In this way, after the two layers of single-faced corrugated paper are combined to form the middle core paper, the two layers of corrugated core paper cannot be completely and tightly fitted. On the contrary, because the two layers of corrugated core paper cannot be completely and tightly fitted, a stable small-sized triangular structure is formed; the strength of the corrugated paperboard is enhanced; in addition, not pursuing a tight fit also reduces the requirements for the accuracy of the machine equipment.

[0008] Another technical solution is that the strength reinforcement structure includes a plurality of triangular reinforcement cardboard structures, each of which is formed by three pieces of cardboard being integrally connected end to end or fixedly connected, and a folding cardboard extending outward is fixedly arranged on each surface of the triangular reinforcement cardboard structure, the cross section of the folding cardboard is L-shaped and the folding cardboard contains a plane parallel to the surface of the connected triangular reinforcement cardboard structure and having the same size and shape; the aforementioned plane of the folding cardboard is fixedly connected with a sponge layer facing the inner wall of the triangular reinforcement cardboard structure. The reinforcement strips of the prior art (generally, triangular partition structures arranged in sequence are arranged between two parallel cardboards to form a triangular stable structure) are changed into a plurality of plug-in triangular reinforcement cardboard structures, and the length of the reinforcement strips does not need to be customized according to corrugated boxes of different sizes and specifications. Through the plug-in setting, the size and position of the reinforcement strips can be reasonably and flexibly adjusted according to corrugated boxes of different sizes and specifications and different objects placed in the corrugated boxes. It is only necessary to take out a suitable number of triangular reinforcement cardboard structures after placing the object in the corrugated box and before packaging, and plug them in and connect them front and back until the remaining space is provided with reinforcement strips in the three directions of length, width and height to complete the strength reinforcement of the corrugated box after the object is placed. The inner wall of the folded cardboard is fixedly connected with a sponge layer, which can make the adjacent triangular reinforced cardboard structures more firmly connected, and the two adjacent triangular reinforced cardboard structures are firmly connected through the elastic sponge layer.

[0009] The present invention also provides a technical solution, that is, a process for processing the corrugated paper box, which is composed of the following process steps performed in sequence: S1: Corrugated board processing: The corrugated base paper and the surface paper are processed into single-sided corrugated board through a single-sided machine; then the single-sided corrugated paper is transported to a double-layer gluing machine through a conveying bridge, and the double-layer gluing machine glues two pieces of single-sided corrugated paper into double-layer corrugated paper; S2: Wire cutting: Use slitting wire cutting machine to make the dividing line; S3: Conveying and stacking: The sharpened corrugated cardboard is output from the double-layer gluing machine through the paper output roller, and then transported to the stacker for stacking through the conveyor belt; S4: Cardboard folding: folding the corrugated cardboard to form a corrugated box; S5, Carton Binding: The folded corrugated cartons are transported to the appropriate location and bound by a carton stapler; S6, carton inspection; S7. Stacking of cartons.

[0010] A further technical solution is that the double-layer glue coating machine is composed of a sticker machine, a conveyor belt, a heating device and a cooling device arranged in sequence along the conveying direction; the sticker machine includes a frame, on which a driving roller and a guide roller for rotatingly arranging single-sided corrugated paper are arranged, and an upper conveying frame connected to a conveying bridge is also arranged on the frame for conveying another layer of single-sided corrugated paper, and one end of the upper conveying frame is connected to an inclined conveying plate; A pair of guide rollers for combining the upper and lower layers of single-faced corrugated paper are rotatably arranged on the frame; an arc-shaped guide plate is fixedly connected to the conveying end of the inclined conveying plate so that the upper layer of single-faced corrugated paper is conveyed to the upper part of the guide roller located above, and an inclined guide plate is also fixedly connected to the frame so that the lower layer of single-faced corrugated paper is conveyed to the lower part of the guide roller located below; A pair of laminating rollers are arranged on the frame at one side of a pair of guide rollers, and the guide rollers and the laminating rollers are arranged in sequence along the conveying direction. The upper conveying frame conveys the upper single-faced corrugated paper, and the driving rollers and guide rollers convey the lower single-faced corrugated paper. The upper single-faced corrugated paper is conveyed to the upper side of the upper guide roller, and the lower single-faced corrugated paper is conveyed to the lower side of the lower guide roller. In this way, the guide rollers can be arranged in a structure similar to that of the corrugated rollers to guide the upper and lower layers of single-faced corrugated paper to be conveyed and facilitate the subsequent closing.

[0011] The advantages and beneficial effects of the present invention are: the upper conveyor frame conveys the upper layer of single-sided corrugated paper, the driving roller and the guide roller convey the lower layer of single-sided corrugated paper, the upper layer of single-sided corrugated paper is conveyed to the top of the upper guide roller, and the lower layer of single-sided corrugated paper is conveyed to the bottom of the lower guide roller. In this way, it is only necessary to set the guide roller to a structure similar to that of the corrugated roller to guide the conveyance of the upper and lower layers of single-sided corrugated paper and facilitate the subsequent closure.

[0012] Two pieces of single-sided corrugated paper are combined into double-layer corrugated paper, which can reduce the requirements for corrugated base paper, because the middle corrugated core paper has higher requirements and is generally made of shorter fibers from hardwood trees. After the process is improved, even the raw material of the surface paper, that is, the long fibers of cork trees, can be used, because the two layers of corrugated core paper are plugged in the same direction to form the final middle core paper; the raw material requirements for the base paper are reduced through process improvements.

[0013] The slopes of the side edges of the flute peaks of two layers of single-faced corrugated paper are different, and the side slope of the flute peak of one layer of single-faced corrugated paper is larger. Therefore, after the two layers of single-faced corrugated paper are combined to form the middle core paper, the two layers of corrugated core paper cannot fit completely and tightly together. On the contrary, since the two layers of corrugated core paper cannot fit completely and tightly together, a stable small-sized triangular structure is formed, which strengthens the strength of the corrugated board. In addition, not pursuing a tight fit also reduces the requirements for the accuracy of machinery and equipment.

[0014] The reinforcement strips of the prior art (generally, triangular partition structures arranged in sequence between two parallel cardboards to form a triangular stable structure) are changed into several plug-in triangular reinforcement cardboard structures. It is not necessary to customize the length of the reinforcement strips according to the corrugated boxes of different sizes and specifications. Through the plug-in setting, the size and position of the reinforcement strips can be reasonably and flexibly adjusted according to the corrugated boxes of different sizes and specifications and the different objects placed in the corrugated boxes. It is only necessary to take out a suitable number of triangular reinforcement cardboard structures after placing the objects in the corrugated boxes and before packaging, and plug and connect them front and back until the remaining space is provided with reinforcement strips in the three directions of length, width and height to complete the strength reinforcement of the corrugated boxes after the objects are placed. The inner wall of the folded cardboard is fixedly connected with a sponge layer, which can make the adjacent triangular reinforcement cardboard structures more secure when connected, and the two adjacent triangular reinforcement cardboard structures are firmly connected through the elastic sponge layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded schematic diagram of the corrugated paperboard in the first embodiment of a corrugated paperboard box of the present invention; Figure 2 yes Figure 1 Schematic diagram after assembly; Figure 3 yes Figure 2 A schematic diagram after removing the upper single-faced corrugated paper face paper and only showing part of the flute and flute peaks of the upper single-faced corrugated paper; Figure 4 yes Figure 3 Enlarged schematic diagram of the circled part; Figure 5 is a schematic diagram of a sticker machine in a double-layer glue coating machine in Embodiment 3 of the present invention; Figure 6 yes Figure 5 The main view of Figure 7 yes Figure 6 An enlarged schematic diagram of the upper right corner of ; Figure 8 yes Figure 5 Schematic diagram of another perspective after removing one side of the bracket; Fig. 9 yes Figure 5 A side view of the toothed roller at the middle annular gap; Fig.10 yes Fig. 9 Schematic diagram of the decomposition of Fig.11 is a schematic diagram of a fourth embodiment of the present invention; Fig.12 yes Fig.11 A partial enlarged schematic diagram of Fig.13 yes Fig.12 An enlarged schematic diagram of the curved annular guide rail and the arc baffle portion; Fig.14 is an exploded schematic diagram of four triangular reinforced paperboard structures before being assembled in Embodiment 5 of the present invention; Fig.15 yes Fig.14 The rear view of the triangular reinforced cardboard structure at the far left; Fig.16 is a schematic diagram of a reinforcement strip in the prior art; Fig.17 It is a schematic diagram of a reinforcement strip formed by plugging a small-sized triangular reinforced cardboard structure with a triangular reinforced cardboard structure; Fig.18 It is an exploded schematic diagram of the assembled triangular reinforced paperboard structure and three matching small-sized triangular reinforced paperboard structures in the sixth embodiment of the present invention; Fig.19 It is an exploded schematic diagram of a small-sized triangular reinforced paperboard structure and three matching folding cardboards in Embodiment 6 of the present invention.

[0016] In the figure: 1. single-faced corrugated paper; 2. corrugation peak; 3. corrugation valley; 4. wavy core paper; 5. face paper; 6. frame; 7. drive roller; 8. guide roller; 9. upper conveyor frame; 10. inclined conveyor plate; 11. frame plate; 12. thickness plate; 13. roller body; 14. annular gap; 15. semi-annular roller body; 16. internal thread; 17. arc guide plate; 18. oblique guide plate; 19. laminating roller; 20. oblique guide rail; 21. glue dispenser; 22. hose; 23. curved annular guide rail; 24. arc baffle; 25. triangular reinforced cardboard structure; 26. folded cardboard; 27. sponge layer; 28. reinforcement strip; 29. ​​small-sized triangular reinforced cardboard structure; 30. rubber layer. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] Embodiment 1: Figures 1 to 4 As shown, the present invention is a corrugated paper box, The corrugated paperboard of the corrugated paper box is a double-layer corrugated paper composed of two single-faced corrugated papers 1, the flute peaks 2 of the two single-faced corrugated papers 1 are staggered, and the flute peaks 2 of one single-faced corrugated paper are inserted into the flute valleys 3 of the other single-faced corrugated paper.

[0019] The single-faced corrugated paper is the same as the prior art, with a layer of corrugated core paper 4, which is processed by corrugating corrugated base paper, and a layer of face paper 5; the corrugated core paper in the single-faced corrugated paper, that is, the corrugated base paper, is made of long fibers from cork trees, and the face paper in the single-faced corrugated paper is also made of long fibers from cork trees.

[0020] The slopes of the peak sides of the flute peaks of the two layers of single-faced corrugated paper are different.

[0021] Two pieces of single-faced corrugated paper are combined into double-layer corrugated paper, which can reduce the requirements for corrugated base paper, because the middle corrugated core paper has higher requirements and is generally made of shorter fibers from hardwood trees. After the process is improved, the raw material of the face paper, that is, the long fibers of softwood trees, can even be used, because the two layers of corrugated core paper are plugged in the same direction to form the final middle core paper; the raw material requirements for the base paper are reduced through process improvements; it can still be regarded as a bonding composite process, three-in-one, with a middle corrugated core paper and two layers of straight paperboard (face paper) on the top and bottom; or it can be regarded as a four-in-one bonding composite process, because the middle corrugated core paper is made by bonding two layers of corrugated core paper; The slopes of the sides of the peaks of the two layers of single-faced corrugated paper are different. The side slope of the peaks of one layer of single-faced corrugated paper is larger. When the two layers of single-faced corrugated paper are combined to form the middle core paper, the two layers of corrugated core paper cannot fit together completely and tightly. On the contrary, because the two layers of corrugated core paper cannot fit together completely and tightly, a stable small-sized triangular structure is formed (such as Figure 4 The similar triangular structure in the circle, however, due to its shape design, the flute 3 in the circle is not a strict triangle, but a circular arc, but also forms a stable structure similar to a triangle), which strengthens the strength of the corrugated board; in addition, not pursuing a perfect fit also reduces the requirements for the accuracy of the machine equipment; The strength of corrugated board made of general corrugated board is achieved by using double-layer single-faced corrugated paper (the corrugated base paper is made of long fibers of cork trees), and the strength of the entire corrugated board is enhanced by forming a triangular structure through the different slopes of the flute peaks of the two layers of single-faced corrugated paper, which also reduces the dependence on high-precision equipment.

[0022] Embodiment 2: The difference from Embodiment 1 is that a processing technology for a corrugated paper box comprises the following process steps performed in sequence: S1: Corrugated board processing: The corrugated base paper and the face paper are processed into single-sided corrugated board through a single-sided machine. During the corrugation processing, hot steam is sprayed on the single-sided machine to better shape it. Then, the single-sided corrugated paper is transported to a double-layer gluing machine (which has upper and lower conveyor belts; a series of heating plates; and is transported to a cooling part after passing through the heating part) through a conveying bridge. The double-layer gluing machine glues two pieces of single-sided corrugated paper into double-layer corrugated paper. S2: Pressing line: Use the longitudinal cutting press machine to make the cutting line (that is, the chamfer of the corrugated box, that is, the folding line of the double-layer corrugated paper); S3: Conveying and stacking: The sharpened corrugated cardboard is output from the double-layer gluing machine through the paper output roller, and then transported to the stacker for stacking through the conveyor belt; S4: Cardboard folding: folding the corrugated cardboard to form a corrugated box; S5, Carton Binding: The folded corrugated cartons are transported to the appropriate location and bound by a carton stapler; S6, carton inspection; S7, carton stacking; The creasing process is cardboard cutting: a cutting system (slitting and creasing machine) is used to cut a cutting line on the double-layer corrugated paper to form a dividing line.

[0023] Embodiment 3: The difference from Embodiment 2 is that Figures 5 to 10 As shown (for ease of illustration, Figures 5 to 8 The toothed roller at the annular gap is not shown), the double-layer glue coating machine is composed of a sticker machine, a conveyor belt, a heating device and a cooling device in sequence along the conveying direction; the sticker machine includes a frame 6, on which a driving roller 7 and a guide roller 8 for rotatingly setting a single-sided corrugated paper 1 are arranged, and an upper conveying frame 9 connected to the conveying bridge is also arranged on the frame for conveying another layer of single-sided corrugated paper 1, and an inclined conveying plate 10 is connected to one end of the upper conveying frame 9, on which a frame plate 11 is fixedly arranged, and a connecting rod is fixedly arranged on the frame plate, and a thickness plate 12 is fixedly arranged on the connecting rod to ensure that the single-sided corrugated paper 1 passes through, so as to avoid partial stacking of the single-sided corrugated paper during the conveying process, and keep the single-sided corrugated paper in a straight state for conveying; the spacing between the thickness plate and the inclined conveying plate is slightly larger than the thickness of the single-sided corrugated paper; A pair of guide rollers for combining the upper and lower layers of single-faced corrugated paper are rotatably arranged on the frame, and the guide rollers include a roller shaft, on which roller bodies 13 are arranged at equal intervals, and a toothed roller matching the corrugated core paper of the single-faced corrugated paper is detachably connected at the annular gap 14 between adjacent roller bodies; The detachable connection is provided with a toothed roller, and a suitable toothed roller can be selected according to the corrugated paper of different flute types to improve the adaptability of the sticker machine.

[0024] A toothed roller is provided at each annular gap, and each toothed roller is composed of two semi-annular roller bodies. The two semi-annular roller bodies 15 are fastened together by bolts. A blind hole-shaped internal thread 16 is provided on one semi-annular roller body, and a bolt adapted to the aforementioned internal thread is provided on the other semi-annular roller body. In order to prevent the bolt from protruding from the tooth shape of the semi-annular roller body and affecting the matching and fitting between the toothed roller and the corrugated core paper of the single-faced corrugated paper, a countersunk hole is provided on the surface of the semi-annular roller body to accommodate the head of the bolt.

[0025] The conveying end of the inclined conveying plate 10 is fixedly connected with an arc guide plate 17 so that the upper single-faced corrugated paper is conveyed to the upper part of the guide roller, and the frame is also fixedly connected with an inclined guide plate 18 so that the lower single-faced corrugated paper is conveyed to the lower part of the guide roller.

[0026] A pair of laminating rollers 19 are provided on the frame and are located on one side of the guide roller. The guide rollers and the laminating rollers are arranged in sequence along the conveying direction. Two inclined guide rails 20 fixedly connected to the frame are provided between the pair of guide rollers and the pair of laminating rollers 19. The inclination directions of the two inclined guide rails are gradually approaching along the conveying direction (so that the upper and lower layers of single-sided corrugated paper can be closed to realize that their respective corrugated peaks are inserted into the corrugated valleys of the other layer of single-sided corrugated paper).

[0027] (For gluing the corrugated core paper of the upper and lower layers of single-sided corrugated paper, the existing technology can be used to control the rotation of the rubber roller and the calibration roller to apply an appropriate amount of glue to the corrugated base paper peaks. This method is to set a rubber roller below the corrugated core paper of the single-sided corrugated paper when the corrugated core paper is transported straight;) Or because the corrugated board is composed of two layers of single-sided corrugated paper, a simpler gluing method can be used, and the gluing method of coating glue is abandoned. Instead, glue is spread (or applied) on the corrugated core paper of one layer of the single-sided corrugated paper. The method is: use a glue head that is consistent with the width of the single-sided corrugated paper (similar to a glue drop needle or needle nozzle, and change the original glue dispenser needle nozzle into a rectangular long mouth instead of the original round mouth; or a row of glue dispensers 21 can be used instead, Because the two layers of single-sided corrugated paper in this scheme are not completely fitted, there is no need for full and accurate glue coverage, and the glue blind spots of a row of glue dispensers are located on the same straight line, which is equivalent to glue dispensed at intervals on a straight line of the corrugated core paper, so the two layers of single-sided corrugated paper can still fit firmly after pressing; the needle nozzles of a row of glue dispensers are connected through a hose 22, and the other end of the hose is facing the corrugated core paper of the single-sided corrugated paper on the inclined guide rail below and this hose is very close to the closing part of the two inclined guide rails), and the glue head maintains a certain distance from the corrugated core paper of the single-sided corrugated paper. During the transportation of the single-sided corrugated paper, glue is basically applied to the surface of the corrugated core paper, and it can be firmly bonded to another layer of single-sided corrugated paper during the subsequent combination pressing process.

[0028] (Borrowing from the principle of glue dispensing machine: The working principle of glue dispensing machine is mainly based on air pressure control and precise mechanical movement to achieve precise glue coating or dispensing operation. The glue dispensing machine uses compressed air as a power source, and sends compressed air into the glue bottle or syringe. Under the action of compressed air, the glue is pressed into the feed pipe connected to the piston chamber. When the piston is in the upstroke, the piston chamber is filled with glue; when the piston pushes the glue needle downward, the glue is pressed out of the needle nozzle under pressure. The amount of glue dripped is determined by the distance the piston moves down, which can be adjusted manually or precisely controlled by programming.) Embodiment 4: The difference from Embodiment 3 is that Figures 11 to 13As shown, two curved annular guide rails 23 (or curved rectangular shells) fixedly connected to the frame are provided between a pair of guide rollers and a pair of bonding rollers 19. The two curved annular guide rails are symmetrically arranged with respect to the horizontal line (so that the upper and lower layers of single-faced corrugated paper 1 can be closed to achieve the insertion of their respective flute peaks into the flute valleys of the other layer of single-faced corrugated paper). An arc-shaped baffle plate 24 is also fixedly connected to the outer wall of each curved annular guide rail relative to the guide roller. The arc-shaped baffle plate is arranged in the same shape as the guide roller to ensure that the single-faced corrugated paper conveyed by the guide roller is conveyed as accurately as possible during the subsequent conveyance to the bonding roller (to avoid local accumulation that ultimately affects the bonding and closing of the upper and lower layers of single-faced corrugated paper).

[0029] Each needle nozzle of a row of dispensing machines 21 is connected by a hose 22, and the other end of the hose passes through the curved annular guide rail below and is directly facing the corrugated core paper of the single-faced corrugated paper therein, and the hose opening is very close to the closing point of the two curved annular guide rails.

[0030] Embodiment 5: The difference from Embodiment 1 is that Figures 14 to 16 As shown (for ease of illustration, Fig.14 Only part of the folding cardboard is shown), a plug-in triangular reinforced cardboard structure is arranged in the corrugated box, and the cross-sectional shape of each triangular reinforced cardboard structure is a right triangle. The triangular reinforced cardboard structure 25 can be made of a cardboard that is bent twice in its length direction and finally the two edges in the length direction are bonded together, and a folding cardboard 26 extending outward is fixedly arranged on each surface of the triangular reinforced cardboard structure. The cross-sectional shape of the folding cardboard is L-shaped and the folding cardboard contains a plane that is parallel to the surface of the connected triangular reinforced cardboard structure and has the same size and shape; the aforementioned plane of the folding cardboard is fixedly connected to the inner wall of the triangular reinforced cardboard structure facing the triangular reinforced cardboard structure with a sponge layer 27.

[0031] If an integer number of triangular reinforced cardboard structures cannot match the length, width or height of the remaining space, a pair of small-sized triangular reinforced cardboard structures are provided (of course, the size of the small-sized triangular reinforced cardboard structures needs to be customized) and plugged into the assembled triangular reinforced cardboard structures.

[0032] Therefore, the entire corrugated box strength reinforcement structure only needs to be equipped with a number of triangular reinforced cardboard structures of the same size and a pair of small-sized triangular reinforced cardboard structures (the reason for a pair of small-sized triangular reinforced cardboard structures is to allow the two small-sized triangular reinforced cardboard structures to form a rectangle that can eventually rest against the inner wall of the corrugated box).

[0033] The small-sized triangular reinforced cardboard structure 29 has the same size as the folded cardboard of the triangular reinforced cardboard structure (such as Fig.17 As shown, the one at the bottom is a small-sized triangular reinforced cardboard structure).

[0034] The plug-in setting can avoid the previous setting of the entire reinforcement strip to reduce the volume of the corrugated box, and can flexibly adjust the position of the reinforcement strip according to the specific shape of the items in the corrugated box, while still ensuring the strength of the corrugated box.

[0035] The reinforcing strips 28 of the prior art (generally, triangular partition structures arranged in sequence between two parallel cardboards to form a triangular stable structure) are changed into a plurality of plug-in triangular reinforcing cardboard structures. There is no need to customize the length of the reinforcing strips according to the corrugated cardboard boxes of different sizes and specifications. Through the plug-in setting, the size and position of the reinforcing strips can be reasonably and flexibly adjusted according to the corrugated cardboard boxes of different sizes and specifications and the different objects placed in the corrugated cardboard boxes. It is only necessary to take out a suitable number of triangular reinforcing cardboard structures after placing the objects in the corrugated cardboard box and before packaging, and plug them in front and back until the remaining space is provided with reinforcing strips in the three directions of length, width and height to complete the strength reinforcement of the corrugated cardboard box after the objects are placed.

[0036] Embodiment 6: The difference from Embodiment 5 is that Fig.18 , Fig.19 As shown, if an integer number of triangular reinforced cardboard structures cannot be consistent with the length, width or height of the remaining space, several pairs of small-sized triangular reinforced cardboard structures (generally three pairs can basically cope with various situations) are matched and arranged to be plugged and connected with the assembled triangular reinforced cardboard structures. In addition, a folding cardboard 26 extending outward is fixedly arranged on each surface of the small-sized triangular reinforced cardboard structure 29, and three folding cardboards with rubber layers 30 fixed on the inner wall are matched with the folding cardboards. The sizes of the three folding cardboards (here, the folding cardboards with rubber layers fixed on the inner wall) are different to cope with the length, width or height of different remaining spaces.

[0037] Therefore, the entire corrugated box strength reinforcement structure only needs to be equipped with a number of triangular reinforced cardboard structures of the same size, a number of pairs of triangular reinforced cardboard structures of small size, and three folded cardboards with rubber layers fixed on the inner walls.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A corrugated paper box, characterized in that: The corrugated paper box is provided with a corrugated paper box strength reinforcement structure.

2. A corrugated paper box according to claim 1, characterized in that: The strength enhancement structure includes: the corrugated paperboard of the corrugated paper box is a double-layer corrugated paper composed of two single-faced corrugated papers, the flute peaks of the two single-faced corrugated papers are staggered, and the flute peak of one single-faced corrugated paper is inserted into the flute valley of the other single-faced corrugated paper.

3. A corrugated paper box according to claim 2, characterized in that: The single-faced corrugated paper is formed by bonding a layer of corrugated core paper and a layer of face paper; the corrugated core paper is processed by corrugating corrugated base paper; the corrugated base paper and face paper are both made of long fibers of cork trees.

4. A corrugated paper box according to claim 3, characterized in that: The slopes of the peak sides of the flute peaks of the two layers of single-faced corrugated paper are different.

5. A corrugated paper box according to claim 1, characterized in that: The strength reinforcement structure includes a plurality of triangular reinforced cardboard structures, each of which is formed by three pieces of cardboard being integrally connected end to end or fixedly connected, and a folded cardboard extending outward is fixedly arranged on each surface of the triangular reinforced cardboard structure, the cross section of the folded cardboard is L-shaped and the folded cardboard contains a plane which is parallel to the surface of the connected triangular reinforced cardboard structure and has the same size and shape; the aforementioned plane of the folded cardboard is fixedly connected to the inner wall of the triangular reinforced cardboard structure.

6. A process for processing a corrugated paper box as claimed in claim 4 or 5, characterized in that: It consists of the following process steps performed in sequence: S1: Corrugated board processing: The corrugated base paper and the surface paper are processed into single-sided corrugated board through a single-sided machine; then the single-sided corrugated paper is transported to a double-layer gluing machine through a conveying bridge, and the double-layer gluing machine glues two pieces of single-sided corrugated paper into double-layer corrugated paper; S2: Wire cutting: Use slitting wire cutting machine to make the dividing line; S3: Conveying and stacking: The sharpened corrugated cardboard is output from the double-layer gluing machine through the paper output roller, and then transported to the stacker for stacking through the conveyor belt; S4: Cardboard folding: folding the corrugated cardboard to form a corrugated box; S5, Carton Binding: The folded corrugated cartons are transported to the appropriate location and bound by a carton stapler; S6, carton inspection; S7. Stacking of cartons.

7. A processing technology for a corrugated paper box according to claim 6, characterized in that: The double-layer glue coating machine is composed of a sticker machine, a conveyor belt, a heating device and a cooling device arranged in sequence along the conveying direction; the sticker machine includes a frame, on which a driving roller and a guide roller for rotating single-sided corrugated paper are arranged, and an upper conveying frame connected to a conveying bridge is also arranged on the frame for conveying another layer of single-sided corrugated paper, and one end of the upper conveying frame is connected to an inclined conveying plate; A pair of guide rollers for combining the upper and lower layers of single-faced corrugated paper are rotatably arranged on the frame; an arc-shaped guide plate is fixedly connected to the conveying end of the inclined conveying plate so that the upper layer of single-faced corrugated paper is conveyed to the upper part of the guide roller located above, and an inclined guide plate is also fixedly connected to the frame so that the lower layer of single-faced corrugated paper is conveyed to the lower part of the guide roller located below; A pair of laminating pressing rollers are arranged on the frame and are located on one side of a pair of guide rollers. The guide rollers and the laminating pressing rollers are arranged in sequence along the conveying direction.

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