Slotting and line pressing equipment for upper printing paperboard

Abstract

The invention discloses slotting and line pressing equipment for an upper printed paper board. The slotting and line pressing equipment comprises a lower slotting cutter, a line pressing cutter, an upper slotting cutter, an upper slotting cutter cross beam, a lower slotting cutter cross beam and a double-eccentric-wheel mechanism. By means of the mode that the paperboard is slotted from bottom to top, the paperboard grooving machine can be directly in butt joint with paperboard printing equipment, and grooving and line pressing can be conducted at the same time without turning over the paperboard. And a paper supporting spring piece is arranged on the lower grooving cutter cross beam, so that friction of the conveying belt to the paperboards during grooving can be avoided, and the grooving quality is improved. The initial height adjusting module is arranged on the lower grooving cutter cross beam, the movement distance of the line pressing cutter can be adjusted, and then the line pressing requirements of paperboards with different thicknesses are met. The two lower grooving cutters with the adjustable distance are arranged on the same lower grooving cutter beam, the multiple sets of grooving cutters are arranged, grooving and line pressing can be conducted on one paperboard at the same time according to the grooving and line pressing requirements of the paperboard, and the paperboard machining efficiency is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of production and manufacturing of packaging paperboard, in particular to a device for grooving and creasing printed paperboard. Background Art

[0002] Cardboard slotting and creasing are core processes in packaging manufacturing, primarily used in the production of packaging products such as cartons, display racks, and trays. Their core purpose is to create custom notches and indentations in cardboard to facilitate folding and enhance structural stability. Cardboard slotting and creasing equipment is a type of automated cardboard production line that combines both slotting and creasing functions. Existing cardboard slotting and creasing equipment typically utilizes either horizontal circular knives for slotting or vertical vertical knives for slotting. However, high-speed cardboard printing equipment typically utilizes a vertical feed and top-down printing process. As cardboard sheets from the high-speed cardboard printing equipment flow to the slotting and creasing equipment, the creasing and slotting knives operate on the printed side of the cardboard. Since creasing and slotting operate from top to bottom, the creasing and slotting knives operate on the reverse side of the printed side. Therefore, the printed cardboard sheets are typically flipped over before being fed to the slotting and creasing equipment. This flipping process reduces the efficiency of slotting and creasing, and also increases the number of steps required in the entire cardboard production line.

[0003] Therefore, how to make the cardboard slotting and creasing equipment directly connected to the cardboard printing equipment, saving the cardboard turning process, and directly slotting and creasing the printed cardboard is a technical problem that needs to be solved in the production and manufacturing field of packaging cardboard. Summary of the Invention

[0004] In order to solve the defects and shortcomings of the above-mentioned prior art, the present invention provides a printed cardboard slotting and creasing device, which can directly and simultaneously slot and creasing the cardboard printed by high-speed cardboard printing equipment. The slotting and creasing work can be directly performed without changing the flow direction and orientation of the cardboard, and the cardboard slotting and creasing processes can also be carried out simultaneously.

[0005] In order to achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0006] A slotting and creasing device for upper printed cardboard comprises a lower slotting knife, a creasing knife, an upper slotting knife, an upper slotting knife beam, a lower slotting knife beam and a double eccentric wheel mechanism, wherein the lower slotting knife is mounted on a linear guide rail slider connecting plate of the lower slotting knife beam, the upper slotting knife is mounted on both sides of a slot-shaped opening below the upper slotting knife beam, the blade spacing between the upper slotting knives on both sides of the opening is adjusted according to the blade thickness of the lower slotting knife, and the lower slotting knife can pass through the blade gap between the upper slotting knives; the upper slotting knife beam is hollow in structure and is not closed at both ends, and a blowing device is connected to one end of the upper slotting knife beam to The paper scraps inside the upper slotting knife beam are blown to the other end; the crimping knife is installed on the lower slotting knife beam and shares a central plane with the lower slotting knife in the vertical direction. The blade of the lower slotting knife is higher than the blade of the crimping knife. The crimping knife and the lower slotting knife move up and down together with the lower slotting knife beam, and the blades of the lower slotting knife and the crimping knife are perpendicular to the paper feeding direction; the double eccentric wheel mechanism is connected to the upper slotting knife beam and the lower slotting knife beam. The two eccentric wheels of the double eccentric wheel mechanism have opposite eccentric directions. In the process of moving with the rotating main shaft, the upper slotting knife beam and the lower slotting knife beam can be driven to move toward and in reverse.

[0007] Furthermore, the slotting knife is trapezoidal in shape, and the blade close to the inside of the slotting and crimping device is lower in horizontal height than the blade close to the outside of the slotting and crimping device.

[0008] Furthermore, two lower slotting knives are mounted on the linear guide rail slider connecting plate of the lower slotting knife crossbeam, and the two lower slotting knives can move towards and in opposite directions on the linear guide rail of the lower slotting knife crossbeam.

[0009] Furthermore, a paper supporting spring piece is provided on the upper end surface of the lower slotting knife beam. When the lower slotting knife beam is at its lowest point, the highest point of the spring piece is lower than the paper feeding plane of the conveyor belt; when the lower slotting knife beam rises, the spring piece lifts the cardboard away from the conveyor belt plane.

[0010] Furthermore, the lower slotting knife beam, the upper slotting knife beam and the lower slotting knife, creasing knife and upper slotting knife installed on the beam form a group of slotting modules. The upper printed cardboard slotting and creasing equipment includes more than two groups of slotting modules, and each slotting module can move along the direction of movement of the cardboard.

[0011] Furthermore, the two or more groups of slotting modules include a group of fixed slotting modules, and the fixed slotting modules are also provided with a box tongue cutter for cutting off excess cardboard on the left and right sides of the box tongue.

[0012] Furthermore, both ends of the lower slotting knife beam are provided with a lower slotting knife beam initial height adjustment module, which is composed of a trapezoidal screw, a trapezoidal screw nut and a connecting plate. The connecting plate is fixedly connected to the trapezoidal screw nut, and the connecting plate is hinged to one of the eccentric wheel mechanisms in the double eccentric wheel mechanism through a connecting rod. The trapezoidal screw is connected to the lower slotting knife beam, and the trapezoidal screw nut adjusts the height difference between the connecting plate and the lower slotting knife beam by moving up and down.

[0013] Furthermore, the lower slotting knife beam initial height adjustment module also includes a lower slotting knife beam initial height adjustment power module, and the lower slotting knife beam initial height adjustment power module includes a stepper motor, a ball spline, a worm gear reducer and a drive shaft. The stepper motor drives the trapezoidal lead screw to rotate through the ball spline, the drive shaft and the worm gear reducer, and then drives the trapezoidal lead screw nut to move up and down.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention arranges the blades of the slotting knife and the creasing knife below the cardboard, slotting and creasing the cardboard from bottom to top. The creasing marks are located below the cardboard and on the back of the printed surface. Therefore, the slotting and creasing equipment of the present invention can be directly connected to the cardboard printing equipment. The cardboard slotting and creasing process is completed directly after printing, reducing intermediate processes, improving production efficiency, and saving labor costs.

[0016] (2) The present invention provides a paper supporting spring sheet on the lower slotting crossbeam. When the slotting and pressing process of the cardboard is not being carried out, the cardboard can pass directly along the conveyor belt without affecting the conveying process of the conveyor belt. When the slotting and pressing process of the cardboard is required, the paper supporting spring sheet lifts the cardboard. After the cardboard leaves the plane of the conveyor belt, it is convenient for the paper tapping module to complete the paper tapping action. At the same time, it can also avoid the movement of the conveyor belt during the slotting process to rub the cardboard, which affects the normal progress of the slotting and pressing process.

[0017] (3) The movement stroke of the double eccentric wheel mechanism is fixed. The connecting plate in the initial height adjustment module of the lower slotting knife beam is connected to an eccentric wheel of the double eccentric wheel mechanism. The trapezoidal screw nut in the initial height adjustment module of the lower slotting knife beam finely adjusts the height difference between the connecting plate and the lower slotting knife beam by moving up and down, thereby indirectly adjusting the shortest distance between the upper slotting knife beam and the lower slotting knife beam when they move towards each other, thereby changing the movement distance between the wire crimping knife and the upper slotting knife beam, thereby adapting to different thicknesses of cardboard during the wire crimping process. In addition, the present invention is designed for the power module for adjusting the initial height of the lower slotting knife beam. The stepper motor drives the trapezoidal screw to rotate through the ball spline, the transmission shaft and the worm gear reducer, so that the stepper motor provides power to the trapezoidal screw installed on the beam without moving with the lower slotting knife beam, thereby avoiding the stepper motor being affected by the high-speed reciprocating motion of the lower slotting knife beam, thereby ensuring the output displacement accuracy and service life of the stepper motor, thereby ensuring the stepper motor's accuracy in adjusting the height difference between the connecting plate and the lower slotting knife beam, and ultimately enabling the upper printing cardboard slotting and pressing device of the present invention to have a longer service life and control accuracy when pressing cardboards of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of the printing paperboard slotting and creasing equipment of the present invention;

[0020] Figure 2 A side view of the upper slotting knife and the lower slotting knife of the present invention;

[0021] Figure 3 This is a schematic diagram of the paper supporting spring of the present invention;

[0022] Figure 4 is a cross-sectional view of the double eccentric wheel of the present invention;

[0023] Figure 5 Schematic diagram of the positions of the lower slotting blade crossbeam initial height adjustment module and the lower slotting blade crossbeam initial height adjustment power module of the present invention;

[0024] Figure 6 A detailed diagram showing the initial height adjustment module of the lower slotting blade beam of the present invention;

[0025] Figure 7 This is a schematic diagram of the box tongue cutting angle module of the present invention;

[0026] Figure 8 This is a side view of the structure of the printed cardboard slotting and creasing equipment of the present invention in a cardboard processing line;

[0027] Figure 9 This is a front view of the structure of the printing paperboard slotting and creasing equipment of the present invention in a paperboard processing line;

[0028] Figure 10 This is a photo of the cardboard after slotting and creasing according to the present invention.

[0029] In the figure: 1-lower slotting knife, 2-crimping knife, 3-upper slotting knife, 4-upper slotting knife beam, 5-lower slotting knife beam initial height adjustment execution module, 6-double eccentric wheel mechanism, 7-lower slotting knife beam, 8-lower slotting knife spacing adjustment module, 9-box tongue cutting angle module, 10-paper supporting spring sheet, 11-lower slotting knife beam initial height adjustment power module, 12-horizontal paper patting module, 13-cardboard end paper patting module, 14-front paper stop module. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of this application.

[0031] See also Figure 1-4The upper printing cardboard slotting and creasing device of this embodiment includes a lower slotting knife 1, a creasing knife 2, an upper slotting knife 3, an upper slotting knife beam 4, a lower slotting knife beam 7 and a double eccentric wheel mechanism 6. The lower slotting knife 1 is mounted on the linear guide slider connecting plate of the lower slotting knife beam 7, and the upper slotting knife 3 is mounted on both sides of the slotted opening below the upper slotting knife beam 4. The blade spacing between the upper slotting knives 3 on both sides of the opening is adjusted according to the blade thickness of the lower slotting knife 1, so that the lower slotting knife 1 can pass through the blade gap between the upper slotting knives 3; the upper slotting knife beam 4 is a hollow structure and its two ends are not closed. A blowing device is connected to one end of the upper slotting knife beam 4. The paper scraps in the upper slotting knife beam 4 can be blown to the other end; the crimping knife 2 is installed on the lower slotting knife beam 7, and shares a central plane with the lower slotting knife 1 in the vertical direction. The blade height of the lower slotting knife 1 is higher than the blade of the crimping knife 2. The crimping knife 2 and the lower slotting knife 1 move up and down together with the lower slotting knife beam 7, and the blades of the lower slotting knife 1 and the crimping knife 2 are perpendicular to the paper feeding direction; the double eccentric wheel mechanism 6 is connected to the upper slotting knife beam 4 and the lower slotting knife beam 7. The two eccentric wheels of the double eccentric wheel mechanism 6 are eccentric in opposite directions. In the process of moving with the rotating main shaft, the upper slotting knife beam 4 and the lower slotting knife beam 7 are driven to move toward and in reverse.

[0032] At the same time, two lower slotting knives 1 are installed on the lower slotting knife crossbeam 7. The lower slotting knife spacing adjustment module 8 is composed of a motor, a linear guide rail and two screw rods with opposite rotation directions. The motor drives the two screw rods with opposite rotation directions to rotate, so that the two lower slotting knives 1 can move towards and in opposite directions on the linear guide rail of the lower slotting knife crossbeam 7, thereby adjusting the spacing between the two lower slotting knives 1 slotting the cardboard.

[0033] A paper support spring 10 is attached to the upper end of the lower slotting blade beam 7. When the lower slotting blade beam 7 is at its lowest point, the spring's highest point is slightly below the conveyor belt's paper feed plane. When the lower slotting blade beam 7 rises, the spring lifts the cardboard off the conveyor belt. This spring 10 lifts the cardboard off the conveyor belt, facilitating the lateral paper tapping module 12's paper tapping action. This also prevents friction between the conveyor belt and the cardboard during the slotting process, which could affect slotting quality.

[0034] See also Figure 5 and 6 , both ends of the lower slotting knife crossbeam 7 are also provided with a lower slotting knife crossbeam initial height adjustment module 5, the lower slotting knife crossbeam initial height adjustment module 5 is composed of a trapezoidal screw, a trapezoidal screw nut and a connecting plate, the connecting plate is fixedly connected to the trapezoidal screw nut, the connecting plate and one of the eccentric wheel mechanisms in the double eccentric wheel mechanism 6 are hinged through a connecting rod, the trapezoidal screw is connected to the lower slotting knife crossbeam 7, and the trapezoidal screw nut adjusts the height difference between the connecting plate and the lower slotting knife crossbeam 7 by moving up and down.

[0035] The lower slotting blade beam initial height adjustment module 5 adjusts the height difference through the lower slotting blade beam initial height adjustment power module 11. The lower slotting blade beam initial height adjustment power module 11 includes a stepper motor, a ball spline, a worm gear reducer, and a transmission shaft. The stepper motor changes the output displacement direction of the stepper motor through the transmission shaft, ball spline, and worm gear reducer, and amplifies the torque to drive the trapezoidal lead screw nut up and down, thereby finely adjusting the height difference between the connecting plate and the lower slotting blade beam 7, achieving fine-tuning of the highest point of the motion trajectory of the lower slotting blade beam 7, and then achieving fine-tuning of the highest point of the motion trajectory of the creasing blade 2, ultimately enabling the creasing blade to crimp cardboards of different thicknesses and adjust the creasing depth.

[0036] For a packaging carton board, it is usually necessary to open multiple slots and press multiple indentations. Therefore, in order to open multiple slots and press multiple indentations at the same time, the upper printing cardboard slotting and creasing equipment of this embodiment includes multiple slotting modules, each slotting module includes a lower slotting knife beam 7, an upper slotting knife beam 4, and a lower slotting knife 1, a creasing knife 2, and an upper slotting knife 3 installed on the beam. Figure 7 As shown, the upper printed cardboard slotting and creasing equipment includes a fixed slotting module and three sets of movable slotting modules. The fixed slotting module is also equipped with a front paper stopper module 14 and a box tongue corner cutting module 9. The front paper stopper module 14 can block and position the cardboard. The box tongue corner cutting module 9 is installed together with the lower slotting knife 1. The angle between the corner cutting blade and the lower slotting knife 1 is 75 degrees, which can remove excess cardboard on both sides of the box tongue. Multiple disc springs are installed below the corner cutting blade mounting seat, allowing the blade to move downward by approximately 4mm, preventing damage after the blade hits the upper slotting knife 3. The first, second, and third movable slotting modules can move along the direction of the cardboard movement, and the movement position of the slotting modules can be controlled and adjusted.

[0037] See also Figure 7 The chamfering blades of the tongue chamfering module 9 form a fixed angle with the lower slotting knife 1 to remove excess cardboard on both sides of the tongue. In this embodiment, the angle between the chamfering blades of the tongue chamfering module 9 and the lower slotting knife 1 is set at 75 degrees, based on the chamfering requirements of the tongue. Multiple disc springs are also installed below the chamfering blade mounting seat, allowing the blade approximately 4mm of downward movement to prevent damage from impacting the upper slotting knife 3.

[0038] See also Figure 8 and 9 The specific working process of the upper printing cardboard slotting and creasing device of this embodiment is as follows:

[0039] 1. After the equipment is started, the carton parameters are input to control the movable slotting modules No. 1, 2, and 3 to move to the corresponding slotting and creasing positions; according to the slotting size, the lower slotting knife spacing adjustment module 8 moves the two lower slotting knives 1 to the corresponding position so that the slotting knives can cut the required slots on the cardboard;

[0040] 2. According to the thickness of the cardboard, the lower slotting knife beam initial height adjustment execution module 5 is driven by the lower slotting knife beam initial height adjustment power module 11 to adjust the initial height of the lower slotting knife beam 7;

[0041] 3. The cardboard enters the equipment along the conveyor belt. When the sensor detects that the cardboard reaches the front paper stop module 14, the paper patting module 13 at the end of the cardboard starts to stop the paper. At the same time, the double eccentric wheel mechanism 6 starts to drive the lower slotting knife beam 7 to move up and the upper slotting knife beam 4 to move down. The paper supporting spring 10 lifts the cardboard, and the horizontal paper patting module 12 completes the paper patting action. At the same time, the front paper stop module 14 stops the cardboard from falling to a horizontal state, indicating a paper-passing state. The slotting beam continues to move to complete the slotting and pressing action. After the slotting and pressing action is completed, the cardboard falls to the conveyor belt plane and flows out of the equipment along the conveyor belt. When the sensor detects that the cardboard has completely flowed out of the equipment, the front cardboard stop is lifted and changes to a paper-stopping state, entering the next cardboard processing flow.

[0042] After the printing paperboard slotting and creasing device of this embodiment has slotted and creasing the paperboard, the paperboard can be Figure 10 shown. Figure 10 By adjusting the distance between the two slotting knives, the cardboard can be crimped and slotted at the same time; similarly, by adjusting the distance between the two slotting knives, the cardboard can be only crimped without slotting; in addition, the printed cardboard slotting and crimping equipment implemented in this embodiment includes multiple sets of slotting modules, so multiple crimping and slotting can be performed on the cardboard at the same time. On the fixed slotting module, while grooving and crimping, the box tongue is also cut out under the action of the box tongue cutting module.

[0043] The above is a further detailed description of the present invention in conjunction with specific / preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. Those skilled in the art of the art to which the present invention belongs may make several substitutions or modifications to the described embodiments without departing from the scope of the present invention, and such substitutions or modifications should be considered to fall within the scope of protection of the present invention.

Claims

1. A slotting and creasing device for printing paperboard, comprising a lower slotting knife, a creasing knife, an upper slotting knife, an upper slotting knife beam, a lower slotting knife beam and a double eccentric wheel mechanism, characterized in that: The lower slotting knife is mounted on the linear guide slider connecting plate of the lower slotting knife crossbeam, and the upper slotting knife is mounted on both sides of the slotted opening below the upper slotting knife crossbeam. The blade spacing between the upper slotting knives on both sides of the opening is adjusted according to the blade thickness of the lower slotting knife, and the lower slotting knife can pass through the blade gap between the upper slotting knives; the interior of the upper slotting knife crossbeam is a hollow structure and the two ends are not closed. A blowing device is connected to one end of the upper slotting knife crossbeam, which can blow paper scraps inside the upper slotting knife crossbeam to the other end; the wire pressing knife is mounted on On the lower slotting knife crossbeam, it shares a common center plane with the lower slotting knife in the vertical direction. The blade of the lower slotting knife is higher than the blade of the crimping knife. The crimping knife and the lower slotting knife move up and down together with the lower slotting knife crossbeam. The blades of the lower slotting knife and the crimping knife are perpendicular to the paper feeding direction. The double eccentric wheel mechanism is connected to the upper slotting knife crossbeam and the lower slotting knife crossbeam. The two eccentric wheels of the double eccentric wheel mechanism are eccentric in opposite directions. In the process of moving with the rotating main shaft, the upper slotting knife crossbeam and the lower slotting knife crossbeam can be driven to move toward and in reverse directions.

2. The device for grooving and creasing printed paperboard according to claim 1, characterized in that: The slotting knife is trapezoidal in shape, and the blade close to the inside of the slotting and crimping equipment is lower in horizontal height than the blade close to the outside of the slotting and crimping equipment.

3. The device for grooving and creasing printed paperboard according to claim 1, characterized in that: Two lower slotting knives are arranged on the linear guide rail slider connecting plate of the lower slotting knife crossbeam. The two lower slotting knives can move towards and in opposite directions on the linear guide rail of the lower slotting knife crossbeam.

4. The device for grooving and creasing printed paperboard according to claim 1, characterized in that: The upper end surface of the lower slotting knife beam is also provided with a paper supporting spring piece. When the lower slotting knife beam is at the lowest point, the highest point of the spring piece is lower than the paper feeding plane of the conveyor belt; when the lower slotting knife beam rises, the spring piece lifts the cardboard away from the conveyor belt plane.

5. The device for grooving and creasing printed paperboard according to claim 1, characterized in that: The lower slotting knife beam, the upper slotting knife beam and the lower slotting knife, creasing knife and upper slotting knife installed on the beam form a group of slotting modules. The upper printing cardboard slotting and creasing equipment includes more than two groups of slotting modules, and each slotting module can move along the direction of cardboard movement.

6. The device for slotting and creasing printed paperboard according to claim 5, characterized in that: The two or more slotting modules include a fixed slotting module, and the fixed slotting module is also provided with a box tongue cutter for cutting off excess cardboard on the left and right sides of the box tongue.

7. The device for grooving and creasing printed paperboard according to claim 1, characterized in that: Both ends of the lower slotting knife beam are also provided with a lower slotting knife beam initial height adjustment module, which consists of a trapezoidal screw, a trapezoidal screw nut and a connecting plate. The connecting plate is fixedly connected to the trapezoidal screw nut, and the connecting plate is hinged to one of the eccentric wheel mechanisms in the double eccentric wheel mechanism through a connecting rod. The trapezoidal screw is connected to the lower slotting knife beam, and the trapezoidal screw nut adjusts the height difference between the connecting plate and the lower slotting knife beam by moving up and down.

8. The device for slotting and creasing printed paperboard according to claim 7, characterized in that: The lower slotting knife crossbeam initial height adjustment module also includes a lower slotting knife crossbeam initial height adjustment power module, and the lower slotting knife crossbeam initial height adjustment power module includes a stepper motor, a ball spline, a worm gear reducer and a transmission shaft. The stepper motor drives the screw nut up and down through the ball spline, the transmission shaft and the worm gear reducer.

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