Automatic production line for paper packaging products

Abstract

The invention discloses an automatic paper packaging product production line, and particularly relates to the technical field of carton production, the automatic paper packaging product production line comprises a strapping machine, the strapping machine comprises a strapping assembly and a strapping conveying assembly, the strapping machine is further provided with two sets of auxiliary pressing assemblies, and each auxiliary pressing assembly comprises an extrusion frame and an extrusion driver; right-angle clamping seats are arranged at the two ends of the extrusion frame and correspond to the edges of the flat carton, corner heating cavities corresponding to the corners of the strapping tape are formed in the right-angle clamping seats, and inner cavities of the corner heating cavities are heated by heating assemblies. The inner cavity of the corner heating cavity is heated, so that the positions of the corners of the strapping tape are heated, after the corners of the strapping tape are heated and softened, plastic deformation can be generated, then the radian area of the corners of the strapping tape is reduced, a right-angle structure is formed as much as possible, and therefore it is guaranteed that a flat carton is tightly strapped, and meanwhile the strapping tape is not prone to deformation. And subsequent damage to the flat carton can also be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of carton production, and more specifically, to an automated production line for paper packaging products. Background Art

[0002] Packaging cartons are a type of packaging container product widely used in the transportation, storage and sales of goods, usually made of corrugated cardboard. They not only protect products from physical damage, but also provide a certain cushioning effect to prevent impact or extrusion during handling and transportation. Packaging cartons are mainly made of corrugated cardboard. The most common carton is a folding carton, which is folded from one or more pieces of corrugated cardboard and fixed with nails or glue. This design is convenient for mass production and storage, and is easy to assemble and disassemble.

[0003] Carton production line is a series of mechanical equipment specially used for making cartons. These equipment are usually arranged in a specific order to ensure the efficiency and continuity of carton production. Carton production line mainly includes corrugated board production equipment, printing equipment, die-cutting machine, nailing machine / gluing machine, folding machine and strapping machine. The cardboard produced by corrugated board production equipment is printed with corresponding patterns and information by printing equipment, and then the cardboard is cut by die-cutting machine according to the preset template to form various parts of the carton. At this time, the cardboard is still in the state of flat plate and has not formed a closed circumference state. Therefore, it is necessary to use a nailing machine / gluing machine to fold the two ends of the cardboard in half and nail / gluing to form a closed circumference state, and form a double-layer flat structure after folding and pressing. In order to facilitate transportation, the carton does not need to be folded and sealed to form a box shape, but is a flat structure in a folded shape, stacked in sequence, and strapped and packaged by a strapping machine, and can be sold to the outside. When used, the carton is refolded into a box structure.

[0004] The strapping machine used for the cartons folded into a flat state is also called a baler or strapping machine. It can bundle products such as cardboard and cartons together for easy handling and storage. It uses strapping tape (such as plastic tape, PP tape, etc.) to secure the goods to ensure that they will not fall apart during transportation.

[0005] During actual strapping, the strapping machine will first pull out a certain length of strapping tape from the tape storage device. The flat cartons are placed in the working area of ​​the strapping machine. The strapping machine will wrap the strapping tape around the flat cartons and ensure that the tape is in the correct position. When the strapping tape is wrapped, the tightening mechanism will start and tighten the tape mechanically or pneumatically. After tightening, the strapping machine will perform hot-melt sealing on both ends of the tape, that is, the heating element will melt and bond the two ends of the tape together, thereby achieving the strapping of multiple flat cartons.

[0006] Among them, corrugated cardboard is composed of face paper, corrugated core paper and lining paper. Corrugated cardboard can be divided into single-wall, double-wall, triple-wall and other types. For some packaging cartons, in order to improve its cushioning and protection effect, more layers of corrugated structure will even be constructed. For this type of packaging box corrugated cardboard, there is a large buffer space behind it. When bundling, in order to ensure the tightness of the bundling, a compacting device will be used to squeeze the multi-layer flat cartons. After bundling, since the strapping itself has a certain strength, a certain arc structure will be formed at the bundling corners. During the subsequent transportation process, the bundled flat cartons will stretch due to the loss of squeezing force, and then form a reverse squeezing with the strapping at the corners of the strapping. The edge of the strapping is relatively sharp, which can easily damage the cardboard structure of the flat cartons at the corners, affecting product quality. Summary of the invention

[0007] The present invention provides an automated production line for paper packaging products, and aims to solve the following problem: after the existing multi-layer corrugated structure is tightly bundled, the bundling belt itself has a certain strength, and a certain arc structure will be formed at the bundling corners; during the subsequent transportation, the bundled flat cartons will stretch due to the loss of squeezing force, and then form reverse squeezing with the bundle at the corners of the bundle, affecting product quality.

[0008] To achieve the above object, the present invention provides the following technical solutions: an automated production line for paper packaging products, comprising a strapping machine, the strapping machine comprising a strapping assembly and a strapping conveying assembly, the strapping machine further comprising two sets of auxiliary pressing assemblies, the two sets of auxiliary pressing assemblies being symmetrically arranged on the strapping conveying assembly; Two groups of auxiliary pressing components are arranged at the subsequent workstations of the strapping component. The auxiliary pressing components include an extrusion frame and an extrusion driver. The extrusion driver is used to drive the auxiliary pressing components to approach the flat carton package. Both ends of the extrusion frame are provided with right-angle holders, and the right-angle holders are arranged corresponding to the edges of the flat carton package. The extrusion frame and the right-angle holders are provided with strapping slots for accommodating strapping straps. The right-angle holders are provided with corner heating cavities corresponding to the corners of the strapping straps, and the inner cavity of the corner heating cavity is heated by the heating component.

[0009] In a preferred embodiment, the production line also includes an auxiliary pressing component, a folder, a gluer, a die-cutter, a printing device and a corrugated cardboard production device. The processing order of the production line is corrugated cardboard production equipment, a printing device, a die-cutter, a gluer, a folder, an auxiliary pressing component and a strapping machine.

[0010] In a preferred embodiment, the heating assembly includes a heating chamber and an air pump, an electric heater is fixedly installed in the heating chamber, and the air pump is connected to the corner heating chamber and the electric heater through an air pipe.

[0011] In a preferred embodiment, the extrusion drive includes a lifting drive, a transverse drive and a longitudinal drive. The longitudinal drive is fixedly mounted on the bundling conveying assembly, the transverse drive is mounted on the output end of the longitudinal drive, the lifting drive is mounted on the output end of the transverse drive, and the extrusion frame is mounted on the output end of the lifting drive. The lifting drive is used to drive the extrusion frame to lift and lower, the transverse drive is used to drive the extrusion frame to move laterally, and the longitudinal drive is used to drive the extrusion frame to move longitudinally.

[0012] In a preferred embodiment, both the transverse drive and the longitudinal drive adopt a linear motor structure, and the lifting drive adopts a hydraulic cylinder structure.

[0013] In a preferred embodiment, the number of pressing frames in each group of auxiliary pressing components is set corresponding to the number of strapping straps on the flat carton package, and the number of pressing drives is set corresponding to the number of pressing frames.

[0014] In a preferred embodiment, the right-angle clamping seat is slidably mounted on the extrusion frame along the length direction of the extrusion frame, and a moving driver for driving the right-angle clamping seat to move is provided on the extrusion frame.

[0015] In a preferred embodiment, strapping belt reverse thrust components are provided at positions on both sides of the right-angle clamp corresponding to the corners of the box gluer, and the strapping belt reverse thrust components are used to drive the material of the strapping belt near the corner area to approach the corner.

[0016] In a preferred embodiment, the reverse thrust assembly of the strapping belt is a reverse thrust wheel, which is rotatably installed in a right-angle holder. The right-angle holder is a rubber wheel. When the right-angle holder is engaged with the flat carton package, the reverse thrust wheel fits the surface of the strapping belt and forms friction resistance, and the reverse thrust wheel is driven to rotate by a motor.

[0017] In a preferred embodiment, the reverse thrust assembly of the strapping strap is a reverse thrust plate, which is slidably installed inside the right-angle holder, in which a cylinder is fixedly installed, and the reverse thrust plate is fixedly installed at the output end of the cylinder. When the right-angle holder is engaged with the flat carton package, the reverse thrust plate fits against the surface of the strapping strap and forms a friction resistance. A rubber pad structure is provided at the position of the reverse thrust plate corresponding to the strapping strap. When the reverse thrust plate cooperates with the strapping strap, the rubber pad forms an elastic pressure on the strapping strap.

[0018] The beneficial effect of the present invention is that the present invention heats the inner cavity of the corner heating cavity, thereby heating the corners of the strapping tape. After the corners of the strapping tape are heated and softened, plastic deformation can occur, thereby reducing the curvature area of ​​the corners of the strapping tape, so that it can form a right-angle structure as much as possible, and according to the stretching force of the flat carton packaging flat carton, the strapping tape can more evenly bind the flat carton, thereby ensuring that the flat carton is tightly bundled while also reducing subsequent damage to the flat carton. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the strapping machine in the production line of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of the production line of the present invention.

[0021] Figure 3 This is a state diagram of the upper and lower groups of auxiliary pressing components of the present invention simultaneously pressing a flat carton package.

[0022] Figure 4 This is a diagram showing the state of the extrusion frame and the right-angle holder of the present invention extruding a flat carton package.

[0023] Figure 5 It is a schematic diagram of the internal structure of a single right-angle holder of the present invention.

[0024] Figure 6 It is a cross-sectional view of the extruded frame of the present invention.

[0025] Figure 7 A schematic structural diagram of one of the strapping reverse thrust assemblies provided by the present invention.

[0026] Figure 8 A schematic structural diagram of another strapping reverse thrust assembly provided by the present invention.

[0027] Fig. 9 This is a diagram of the state when the flat carton package loses pressure and gradually expands after being bundled, and the strapping belt produces an arc structure at the corners due to its own elasticity, causing compression on the flat carton at the edge.

[0028] The accompanying drawings are marked as follows: 1. strapping machine; 11. strapping assembly; 12. strapping conveying assembly; 2. auxiliary pressing assembly; 21. extrusion frame; 22. extrusion drive; 221. lifting drive; 222. transverse drive; 223. longitudinal drive; 23. right-angle holder; 231. corner heating chamber; 24. strapping belt slot; 25. heating assembly; 251. heating chamber; 252. electric heater; 253. air pump; 254. air pipe; 26. reverse thrust wheel; 27. reverse thrust plate; 271. cylinder; 3. folding machine; 4. box gluing machine; 5. die-cutting machine; 6. printing equipment; 7. flat carton package; 71. strapping belt. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] Refer to the instruction manual Figures 1 to 9 , an automated production line for paper packaging products, comprising a strapping machine 1, an auxiliary pressing assembly 2, a folding machine 3, a gluer 4, a die-cutter 5, a printing device 6 and a corrugated cardboard production device, wherein the corrugated cardboard production device is a separate production line, which is not shown in the drawings of the specification of the present invention. The processing order of the above production line is the corrugated cardboard production device, the printing device 6, the die-cutter 5, the gluer 4, the folding machine 3, the auxiliary pressing assembly 2 and the strapping machine 1, and finally the strapping machine 1 straps and packs the folded flat cartons.

[0031] It should be noted that the above-mentioned strapping machine 1, auxiliary pressing assembly 2, folding machine 3, box gluing machine 4, die-cutting machine 5 printing equipment 6 and corrugated cardboard production equipment are all indispensable processing equipment in the carton production process, and each device is a commonly used technical solution in the prior art. Therefore, its specific processing method and equipment structure will not be explained one by one in this embodiment.

[0032] The strapping machine 1 includes a strapping assembly 11 and a strapping conveying assembly 12. The strapping assembly 11 and the strapping conveying assembly 12 are commonly used strapping and conveying devices, which are commonly used prior art in the strapping machine 1. Therefore, the specific structure and processing method thereof are not explained in detail in this embodiment. Compared with the prior art, the difference is that the strapping machine 1 is also provided with two groups of auxiliary pressing assemblies 2, which are arranged at the subsequent stations of the strapping assembly 11, that is, the two groups of auxiliary pressing assemblies 2 are symmetrically arranged on the strapping conveying assembly 12 from top to bottom, wherein the flat carton package 7 (a plurality of folded flat cartons are stacked and placed) formed by strapping and packing by the strapping assembly 11 The strapping assembly 11 is used for strapping, so that the strapping belt 71 is wrapped around the outside of the stacked flat cartons to form a flat carton package 7). The auxiliary pressing assembly 2 includes an extrusion frame 21 and an extrusion driver 22. The extrusion driver 22 is used to drive the auxiliary pressing assembly 2 to approach the flat carton package 7. Both ends of the extrusion frame 21 are provided with right-angle holders 23. The right-angle holders 23 are arranged corresponding to the edges of the flat carton package 7, and the extrusion frame 21 and the right-angle holders 23 are provided with strapping belt slots 24 for accommodating the strapping belt 71. The right-angle holders 23 are provided with corner heating chambers 231 corresponding to the corners of the strapping belt 71. The inner cavity of the corner heating chamber 231 is heated by the heating assembly 25.

[0033] In actual use, after the flat carton package 7 is bundled, it is transported backward by the bundling conveying assembly 12. When the flat carton package 7 has not yet been fully stretched, the upper and lower groups of extrusion frames 21 are controlled to approach each other to extrude the flat carton package 7. At the same time, the right-angle holder 23 on the extrusion frame 21 engages the corners of the flat carton package 7, and the strapping belt 71 is engaged in the strapping belt slot 24. The corners of the rectangular structure formed by the strapping belt 71 are located in the corner heating chamber 231, and then the heating assembly 25 is used to heat the flat carton package 7. The inner cavity of the corner heating cavity 231 is heated, thereby heating the corners of the strapping belt 71. After the corners of the strapping belt 71 are heated and softened, plastic deformation can occur, thereby reducing the curvature area of ​​the corners of the strapping belt 71, so that it can form a right-angle structure as much as possible. According to the stretching force of the flat carton package 7, the strapping belt 71 can more evenly bind the flat carton, thereby ensuring that the flat carton is tightly bundled while reducing subsequent damage to the flat carton.

[0034] Furthermore, in the above embodiment, the heating component 25 includes a heating chamber 251 and an air pump 253. An electric heater 252 is fixedly installed in the heating chamber 251. The air pump 253 is connected to the corner heating chamber 231 and the electric heater 252 through an air pipe 254. Then, the air in the heating chamber 251 can be heated with the help of the electric heater 252, and transported to the corner heating chamber 231 through the air pipe 254, so as to heat the inner cavity of the corner heating chamber 231. It should be noted that the above is only one of the heating schemes of the heating component 25 provided in this embodiment, and other effective heating schemes can also be adopted in actual use.

[0035] Furthermore, the extrusion driver 22 includes a lifting driver 221, a transverse driver 222 and a longitudinal driver 223. The longitudinal driver 223 is fixedly mounted on the strapping conveying assembly 12, the transverse driver 222 is mounted on the output end of the longitudinal driver 223, the lifting driver 221 is mounted on the output end of the transverse driver 222, and the extrusion frame 21 is mounted on the output end of the lifting driver 221. The lifting driver 221 is used to drive the extrusion frame 21 to move up and down, and the transverse driver 222 is used to drive the extrusion frame 21 to move laterally. The longitudinal movement driver 223 is used to drive the extrusion frame 21 to move longitudinally, thereby realizing three-dimensional driving of the extrusion frame 21, wherein two groups of extrusion frames 21 provided in each group of auxiliary pressing components 2 can be set, and the corresponding extrusion drivers 22 are also set as two groups. When the flat carton package 7 is single-line bundled, only one group of extrusion frames 21 is driven to reach the specified position. When the flat carton package 7 is double-line bundled, two groups of extrusion frames 21 can be driven to reach the specified position at the same time. In addition, if the flat carton package 7 is multi-line bundled, multiple groups of extrusion frames 21 can also be set.

[0036] In the above embodiment, the extrusion frame 21 and the extrusion driver 22 can be set in a detachable manner, so that different extrusion frames 21 can be replaced for different flat carton packages 7 to form adaptation. In addition, the right-angle holder 23 can also be set to be movable. For example, the right-angle holder 23 is slidably installed on the extrusion frame 21 along the length direction of the extrusion frame 21, and a movable driver for driving the right-angle holder 23 to move is provided on the extrusion frame 21, so that the distance between the two right-angle holders 23 can be adjusted to adapt to flat carton packages 7 of different sizes.

[0037] It should be noted that the above-mentioned lifting drive 221, transverse drive 222 and longitudinal drive 223 all adopt commonly used linear drive devices, such as linear motors, hydraulic cylinders and air cylinders. In order to ensure that the extrusion frame 21 has sufficient pressure, the lifting drive 221 preferably has a hydraulic cylinder structure.

[0038] In the above embodiment, in order to increase the looseness at the corners of the strapping strap 71, strapping strap reverse thrust components are provided on both sides of the corners of the right-angle holder 23 corresponding to the gluer 4. The strapping strap reverse thrust components are used to drive the material in the corner area of ​​the strapping strap 71 close to the corner to increase the looseness at the corners of the strapping strap 71, making it easier to produce plastic deformation.

[0039] Furthermore, the reverse thrust component of the strapping belt is a reverse thrust wheel 26, which is rotatably installed in the right-angle holder 23. The right-angle holder 23 is a rubber wheel. When the right-angle holder 23 is engaged with the flat carton package 7, the reverse thrust wheel 26 fits the surface of the strapping belt 71 and forms a friction resistance. The reverse thrust wheel 26 is driven to rotate by a motor. In actual use, by driving the reverse thrust wheel 26 to rotate, the material near the corners of the strapping belt 71 can be slightly pushed toward the corners to increase the looseness of the corners of the strapping belt 71 and reduce stress concentration.

[0040] Furthermore, the reverse thrust component of the strapping belt is a reverse thrust plate 27, which is slidably installed inside the right-angle holder 23, in which a cylinder 271 is fixedly installed, and the reverse thrust plate 27 is fixedly installed at the output end of the cylinder 271. When the right-angle holder 23 is engaged with the flat carton package 7, the reverse thrust plate 27 fits the surface of the strapping belt 71 and forms a friction resistance. In actual use, by driving the reverse thrust plate 27 to move toward the corners of the strapping belt 71, the material near the corners of the strapping belt 71 can be slightly pushed toward the corners, so as to increase the looseness at the corners of the strapping belt 71 and reduce stress concentration.

[0041] A rubber pad structure is provided at the position of the reverse thrust plate 27 corresponding to the strapping belt 71 . When the reverse thrust plate 27 cooperates with the strapping belt 71 , the rubber pad forms elastic pressure on the strapping belt 71 , thereby ensuring the friction resistance between the reverse thrust plate 27 and the strapping belt 71 .

[0042] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An automated production line for paper packaging products, characterized in that: The strapping machine (1) comprises a strapping assembly (11) and a strapping conveying assembly (12). The strapping machine (1) is also provided with two sets of auxiliary pressing assemblies (2). The two sets of auxiliary pressing assemblies (2) are symmetrically arranged on the strapping conveying assembly (12) in an upper and lower position. Two groups of auxiliary pressing components (2) are arranged at the subsequent workstations of the strapping component (11), the auxiliary pressing components (2) comprising an extrusion frame (21) and an extrusion driver (22), the extrusion driver (22) being used to drive the auxiliary pressing components (2) to approach the flat carton package (7), both ends of the extrusion frame (21) being provided with right-angled holders (23), the right-angled holders (23) being provided corresponding to the edges of the flat carton package (7), and the extrusion frame (21) and the right-angled holders (23) being provided with strapping belt slots (24) for accommodating strapping belts (71), the right-angled holders (23) being provided with corner heating chambers (231) provided corresponding to the corners of the strapping belts (71), the inner cavity of the corner heating chambers (231) being heated by the heating component (25).

2. The automated production line for paper packaging products according to claim 1, characterized in that: The production line further comprises an auxiliary pressing component (2), a folding machine (3), a box gluer (4), a die-cutting machine (5), a printing device (6) and a corrugated board production device. The processing sequence of the production line is the corrugated board production device, the printing device (6), the die-cutting machine (5), the box gluer (4), the folding machine (3), the auxiliary pressing component (2) and the strapping machine (1).

3. The automated production line for paper packaging products according to claim 2, characterized in that: The heating assembly (25) comprises a heating chamber (251) and an air pump (253); an electric heater (252) is fixedly installed in the heating chamber (251); and the air pump (253) is connected to the corner heating chamber (231) and the electric heater (252) via an air delivery pipe (254).

4. The automated production line for paper packaging products according to claim 3, characterized in that: The extrusion drive (22) comprises a lifting drive (221), a transverse drive (222) and a longitudinal drive (223); the longitudinal drive (223) is fixedly mounted on the bundling conveying assembly (12); the transverse drive (222) is mounted on the output end of the longitudinal drive (223); the lifting drive (221) is mounted on the output end of the transverse drive (222); the extrusion frame (21) is mounted on the output end of the lifting drive (221); the lifting drive (221) is used to drive the extrusion frame (21) to move up and down; the transverse drive (222) is used to drive the extrusion frame (21) to move laterally; and the longitudinal drive (223) is used to drive the extrusion frame (21) to move longitudinally.

5. The automated production line for paper packaging products according to claim 4, characterized in that: The transverse movement driver (222) and the longitudinal movement driver (223) both adopt a linear motor structure, and the lifting driver (221) adopts a hydraulic cylinder structure.

6. The automated production line for paper packaging products according to claim 5, characterized in that: The number of extrusion racks (21) in each group of the auxiliary pressing components (2) is set corresponding to the number of strapping belts (71) on the flat carton package (7), and the number of the extrusion drivers (22) is set corresponding to the number of the extrusion racks (21).

7. The automated production line for paper packaging products according to claim 6, characterized in that: The right-angle clamping seat (23) is slidably mounted on the extrusion frame (21) along the length direction of the extrusion frame (21), and a moving driver for driving the right-angle clamping seat (23) to move is provided on the extrusion frame (21).

8. The automated production line for paper packaging products according to claim 7, characterized in that: The right-angle clamping seat (23) is provided with strapping reverse thrust components at positions on both sides of the corners of the box gluing machine (4), and the strapping reverse thrust components are used to drive the strapping (71) and the material near the corner area to move closer to the corner.

9. The automated production line for paper packaging products according to claim 8, characterized in that: The strapping belt reverse thrust component is a reverse thrust wheel (26), the reverse thrust wheel (26) is rotatably mounted in a right-angle clamping seat (23), the right-angle clamping seat (23) is a rubber wheel, and when the right-angle clamping seat (23) is engaged with the flat carton bag (7), the reverse thrust wheel (26) is in contact with the surface of the strapping belt (71) to form friction resistance, and the reverse thrust wheel (26) is driven to rotate by a motor.

10. The automated production line for paper packaging products according to claim 8, characterized in that: The strapping belt reverse thrust component is a reverse thrust plate (27), the reverse thrust plate (27) is slidably mounted inside a right-angle holder (23), a cylinder (271) is fixedly mounted in the right-angle holder (23), the reverse thrust plate (27) is fixedly mounted at the output end of the cylinder (271), when the right-angle holder (23) is engaged with the flat carton bag (7), the reverse thrust plate (27) is in contact with the surface of the strapping belt (71) and forms a friction resistance, a rubber pad structure is provided at a position of the reverse thrust plate (27) corresponding to the strapping belt (71), when the reverse thrust plate (27) is engaged with the strapping belt (71), the rubber pad forms an elastic pressure on the strapping belt (71).

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