Full-automatic production line for packaging box production

Abstract

The invention belongs to the technical field of paper box processing, and particularly relates to a full-automatic production line for packaging box production, the full-automatic production line comprises a fixed material pushing assembly, a die-cutting machine and a printing machine, the die-cutting machine comprises a base frame, a knife roll, a ventilation cylinder, a motor, a sealing plate, an offset shaft, a rotating plate, a telescopic limiting head and a reset spring; and the ventilation cylinder is divided into a negative pressure cavity and an air collection cavity by the rotating plate. When a single paperboard enters the space between the knife roll and the ventilation cylinder, the knife roll conducts die cutting on the paperboard through the die cutting tool, meanwhile, leftover materials of paperboard die cutting are adsorbed to the ventilation cylinder through negative pressure provided by the negative pressure cavity, and along with rotation of the knife roll and the ventilation cylinder, a paperboard body obtained after die cutting is conveyed to the printing machine through the second conveying belt to be printed. When the leftover materials adsorbed on the ventilation cylinder rotate to the bottom of the ventilation cylinder, the leftover materials adsorbed on the ventilation cylinder are blown down by air provided by the fan into the air collection cavity, so that the separation of the paperboard main body and the leftover materials is realized, and the problem that the paperboard leftover materials are clamped in a die cutting opening of a paperboard is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of paper box processing, and specifically relates to a fully automatic production line for producing packaging boxes. Background Art

[0002] During the processing of packaging boxes, a die-cutting machine is needed to cut the cardboard into a shape that matches the unfolded state of the box. The die-cutting machine uses steel knives, hardware molds, steel wires (or templates carved from steel plates), and applies a certain amount of pressure through the stamping plate to roll and cut the printed product or cardboard into a certain shape.

[0003] Die-cutting machines are divided into flat die-cutting machines, circular die-cutting machines and circular flat die-cutting machines according to the different die-cutting methods. The die-cutting table and the working parts of the pressure-cutting mechanism (pressure roller) of the circular die-cutting machine are both cylindrical in shape, and the molding principle is similar to that of an offset printing press. One or two semicircular die-cutting plates (or metal die-cutting rollers) with the same arc as the die-cutting table base (i.e., die-cutting plate roller) are fixed on the die-cutting plate roller, and the surface of the pressure roller is wrapped with polyester plastic to protect the die-cutting edge. During die-cutting, the feed roller sends the cardboard between the die-cutting roller and the pressure roller, and the two clamp it and roll it to press. After the die-cutting, some of the cardboard scraps will be separated from the cardboard immediately, while some will be stuck in the die-cutting opening of the cardboard and are not easy to separate. During the die-cutting process, cardboard debris and residues will accumulate inside the cutter, and they need to be cleaned in time to ensure the cutting effect of the cutter. Summary of the invention

[0004] The purpose of the present invention is to provide a fully automatic production line for packaging box production in view of the shortcomings of the prior art, so as to solve the technical problems in the prior art.

[0005] The object of the present invention can be achieved by the following technical scheme: a fully automatic production line for producing packaging boxes, which includes a material setting and pushing component, a die-cutting machine and a printing machine, wherein the material setting and pushing component and the die-cutting machine are connected by a conveyor belt 1, and the die-cutting machine and the printing machine are connected by a conveyor belt 2;

[0006] The die-cutting machine includes a base frame and a knife roller and a ventilator mounted thereon, a motor for driving the knife roller and the ventilator to rotate is mounted on the base frame, a sealing plate is fixedly mounted on the base frame, the sealing plate blocks both ends of the ventilator, an eccentrically arranged offset shaft is mounted on the sealing plate, rotating plates are rotatably mounted on both sides of the offset shaft, and the rotating plates are symmetrically arranged along the offset shaft, telescopic limit heads are respectively mounted on both sides of the sealing plate, and the telescopic limit heads are symmetrically arranged along the center of the offset shaft, the rotating plates abut against the telescopic limit heads respectively, and the rotating plates are connected by reset springs;

[0007] The rotating plate separates the ventilation cylinder into a negative pressure chamber and an air collecting chamber. A negative pressure machine and a fan are installed on the base frame. The negative pressure machine and the fan are respectively connected to the negative pressure chamber and the air collecting chamber. A synchronization head is installed on the inner wall of the ventilation cylinder. The synchronization head contacts the rotating plate. A sealing scraper is installed on the rotating plate. The sealing scraper fits the inner wall of the ventilation cylinder.

[0008] Preferably, a negative pressure port and an air supply port are provided on the sealing plate, the negative pressure port and the air supply port are respectively located in the negative pressure chamber and the air collecting chamber, and the negative pressure machine and the fan are connected to the negative pressure port and the air supply port through a pipeline.

[0009] Preferably, a plastic protective layer is installed on the vent cylinder, and through holes are opened on the vent cylinder, and the through holes penetrate the plastic protective layer and the vent cylinder respectively.

[0010] Preferably, the knife roller comprises a die-cutting knife plate and a die-cutting tool, and the die-cutting tool is installed on the die-cutting knife plate.

[0011] Preferably, the material setting and pushing assembly comprises a box body and a weighing plate mounted thereon, a cylinder and a scale frame are mounted on the box body, and the scale frame is connected to the material blocking plate.

[0012] Preferably, a connecting plate is installed at the output end of the cylinder, a pushing frame is installed on the connecting plate, a rotating shaft is rotatably installed inside the pushing frame, a front plate and a rear plate are respectively installed on both sides of the rotating shaft, and the front plate is connected to the pushing frame through a connecting spring.

[0013] Preferably, the second conveyor belt comprises a plurality of strip-shaped feeder belts, and waste boxes are installed at the bottom of the plurality of strip-shaped feeder belts.

[0014] Beneficial effects of the present invention:

[0015] (1) In the present invention, when a single cardboard enters between the knife roller and the air cylinder, the knife roller uses the die-cutting tool to die-cut the cardboard. At the same time, the negative pressure provided by the negative pressure machine to the negative pressure chamber adsorbs the die-cutting scraps of the cardboard on the air cylinder. As the knife roller and the air cylinder rotate, the die-cut cardboard body is transported to the printing press through the conveyor belt 2 for printing. When the scraps adsorbed on the air cylinder rotate to the bottom of the air cylinder, the gas provided by the fan to the air collecting chamber blows down the scraps adsorbed on the air cylinder, thereby separating the cardboard body from the scraps and avoiding the problem of the cardboard scraps being stuck in the die-cutting opening of the cardboard.

[0016] (2) During the die-cutting process of the cardboard, the synchronous head on the air cylinder first contacts the rotating plate on one side of the offset shaft. As the air cylinder rotates, the air cylinder drives the rotating plate on one side of the offset shaft to rotate along the offset shaft through the synchronous head. During this process, the cavity space of the negative pressure chamber gradually decreases, and the cavity space of the air collecting chamber gradually increases; the cavity space of the negative pressure chamber decreases, that is, the adsorption force of the negative pressure chamber on the cardboard scraps increases, so that the air cylinder can adsorb smaller or strip-shaped scraps, thereby improving the separation strength between the cardboard body and the corners. At the same time, the increase in the adsorption force of the negative pressure chamber can effectively suck the debris generated during the cardboard die-cutting process into the negative pressure chamber to avoid The phenomenon of debris accumulation inside the die-cutting tool; the cavity space of the air collecting chamber gradually increases, and the gas inside the air collecting chamber is blown to the die-cutting tool on the other side through the ventilator, so as to clean the die-cutting tool; as the ventilator rotates, the synchronization head compresses the reset spring to the limit through the rotating plate on one side of the offset shaft, so that the reset spring drives the rotating plate on the other side to press and pass through the corresponding telescopic limit head. At this time, under the action of the reset spring, the positions of the two rotating plates are transformed into each other. In this process, the debris adsorbed inside the negative pressure chamber is transferred to the air collecting chamber, and then the fan blows the debris inside the air collecting chamber out of the air collecting chamber to avoid residual debris inside the ventilator.

[0017] (3) The number of cardboards placed on the weighing plate is determined by weighing the cardboards on the weighing plate, and then the overall height of the cardboards on the weighing plate is measured by the scale on the scale frame, and then the thickness of a single cardboard is calculated. Then the height of the baffle plate is adjusted to ensure that only a single cardboard can pass through the bottom of the baffle plate at a time; the cardboard is pushed onto the conveyor belt by the cylinder, and the front plate inside the push frame will first contact the cardboard above the bottom layer. As the cylinder runs, the connecting spring is compressed, the front plate rotates inside the push frame, and the rear plate rotates outside the push frame. At the same time, the front plate fits the cardboard above the bottom layer onto the baffle plate; as the rear plate rotates outside the push frame, the rear plate begins to push the bottom layer of cardboard out of the bottom of the baffle plate, ensuring that when the size of the bottom of the baffle plate changes, the cylinder can still convey a single cardboard, thereby ensuring the die-cutting quality of the die-cutting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure of the material pushing component.

[0021] Figure 3 This is a front view of the overall structure of the material-fixing and pushing component.

[0022] Figure 4 for Figure 3 Schematic diagram of the A part structure.

[0023] Figure 5 This is a schematic diagram of the front structure of the die-cutting machine.

[0024] Figure 6 This is a schematic diagram of the back structure of the die-cutting machine.

[0025] Figure 7 It is a schematic diagram of the connection structure between the vent cylinder and the sealing plate.

[0026] Figure 8 for Figure 7 Schematic diagram of the structure of part B.

[0027] Fig. 9 It is a schematic diagram of the transfer plate structure.

[0028] Fig.10 Die cutting machine die cutting diagram Figure 1 .

[0029] Fig.11 Die cutting machine die cutting diagram Figure 2 .

[0030] Fig.12 This is a schematic diagram of the eccentric installation of the offset shaft.

[0031] The following are marked in the figure: 1. material setting and pushing assembly; 101. box; 102. weighing plate; 103. scale frame; 104. cylinder; 105. connecting plate; 106. material blocking plate; 107. pushing frame; 108. rotating shaft; 109. front plate; 110. rear plate; 111. connecting spring; 2. conveyor belt 1; 3. die-cutting machine; 301. base; 302. base frame; 303. knife roller; 3031. die-cutting tool; 3032. die-cutting knife plate; 304. Ventilator; 3041, negative pressure chamber; 3042, air collecting chamber; 305, motor; 306, sealing plate; 307, offset shaft; 308, rotating plate; 309, reset spring; 311, negative pressure machine; 312, fan; 313, negative pressure port; 314, air supply port; 315, telescopic limit head; 316, synchronization head; 317, sealing scraper; 318, plastic protective layer; 4, printing press; 5, conveyor belt 2; 501, strip feeding belt; 502, waste box. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 12A fully automatic production line for packaging box production includes a material setting and pushing component 1, a die-cutting machine 3 and a printing machine 4. The material setting and pushing component 1 and the die-cutting machine 3 are connected by a conveyor belt 1 2, and the die-cutting machine 3 and the printing machine 4 are connected by a conveyor belt 2 5;

[0034] The die-cutting machine 3 includes a base frame 302 and a knife roller 303 and a ventilator 304 mounted thereon. A motor 305 for driving the knife roller 303 and the ventilator 304 to rotate is mounted on the base frame 302. A sealing plate 306 is fixedly mounted on the base frame 302. The sealing plate 306 blocks both ends of the ventilator 304. An eccentrically arranged offset shaft 307 is mounted on the sealing plate 306. Rotating plates 308 are rotatably mounted on both sides of the offset shaft 307, and the rotating plates 308 are symmetrically arranged along the offset shaft 307. Telescopic limit heads 315 are respectively mounted on both sides of the sealing plate 306, and the telescopic limit heads 315 are symmetrically arranged along the center of the offset shaft 307. The rotating plates 308 respectively abut against the telescopic limit heads 315, and the rotating plates 308 are connected by reset springs 309.

[0035] The rotating plate 308 separates the ventilator 304 into a negative pressure chamber 3041 and an air collecting chamber 3042. A negative pressure machine 311 and a fan 312 are installed on the base frame 302. The negative pressure machine 311 and the fan 312 are respectively connected to the negative pressure chamber 3041 and the air collecting chamber 3042. A synchronization head 316 is installed on the inner wall of the ventilator 304. The synchronization head 316 contacts the rotating plate 308. A sealing scraper 317 is installed on the rotating plate 308. The sealing scraper 317 fits the inner wall of the ventilator 304.

[0036] Specifically, the sealing plate 306 is provided with a negative pressure port 313 and an air supply port 314, which are respectively located in the negative pressure chamber 3041 and the air collecting chamber 3042, and the negative pressure machine 311 and the fan 312 are connected to the negative pressure port 313 and the air supply port 314 through a pipeline.

[0037] Specifically, the knife roller 303 includes a die-cutting knife plate 3032 and a die-cutting tool 3031 , and the die-cutting tool 3031 is installed on the die-cutting knife plate 3032 .

[0038] It should be noted that the base frame 302 is installed on the base platform 301 , and a collection box for collecting debris and scraps may be installed on the base platform 301 .

[0039] It should be noted that during the die-cutting process, the sealing plate 306 is fixed, and the motor 305 drives the knife roller 303 and the ventilator 304 to rotate, thereby achieving die-cutting of the cardboard; the negative pressure chamber 3041 inside the ventilator 304 provides negative pressure through the negative pressure machine 311, and at the same time, the air delivered by the fan 312 to the air collecting chamber 3042 accelerates the flow of gas inside the air collecting chamber 3042, so that the gas inside the air collecting chamber 3042 is discharged through the ventilator 304. Two sets of die-cutting knives 3031 are installed on the die-cutting knife plate 3032, so that the knife roller 303 can die-cut two cardboards when it rotates one circle, thereby improving the die-cutting efficiency of the knife roller 303.

[0040] It should be noted that when a single cardboard is conveyed to the die-cutting machine 3 for die-cutting through the fixed material pushing component 1 and the conveyor belt 2, the cardboard enters between the knife roller 303 and the ventilator 304. During this process, the knife roller 303 uses the die-cutting tool 3031 to die-cut the cardboard. At the same time, the negative pressure provided by the negative pressure machine 311 to the negative pressure chamber 3041 adsorbs the die-cutting scraps of the cardboard on the ventilator 304. As the knife roller 303 and the ventilator 304 rotate, the cardboard die-cutting is completed. The die-cut cardboard body is conveyed to the printing machine 4 for printing through the conveyor belt 2 5. When the scraps adsorbed on the ventilator 304 rotate to the bottom of the ventilator 304, the gas provided by the fan 312 to the air collecting chamber 3042 blows down the scraps adsorbed on the ventilator 304, so as to separate the cardboard body from the scraps and avoid the problem of the cardboard scraps being stuck in the die-cutting opening of the cardboard.

[0041] For details, see Figure 9-11 As shown, during the process of the cardboard entering between the knife roller 303 and the air cylinder 304 (during the cardboard die-cutting process), the synchronous head 316 on the air cylinder 304 first contacts the rotating plate 308 on one side of the offset shaft 307. As the air cylinder 304 rotates, the air cylinder 304 drives the rotating plate 308 on one side of the offset shaft 307 to rotate along the offset shaft 307 through the synchronous head 316. During this process, the rotating plate 308 driven by the synchronous head 316 presses and passes through the corresponding telescopic limiting head 315. As the air cylinder 304 rotates, the synchronous head 316 drives the rotating plate 308 on one side of the offset shaft 307 to rotate toward the rotating plate 308 on the other side. Since the rotating plate 308 on the other side is limited by the corresponding telescopic limiting head 315, the reset spring 309 between the rotating plates 308 close to each other is compressed, and the reset spring 309 between the rotating plates 308 far away from each other is stretched.

[0042] In this process, see Figure 10-11, the cavity space of the negative pressure cavity 3041 gradually decreases, and the cavity space of the air collecting cavity 3042 gradually increases; the cavity space of the negative pressure cavity 3041 decreases, that is, the adsorption force of the negative pressure cavity 3041 on the cardboard scraps increases, so that the ventilator 304 can adsorb smaller or strip-shaped scraps, and improve the separation strength between the cardboard body and the corners. At the same time, the increase in the adsorption force of the negative pressure cavity 3041 can effectively absorb the debris generated during the cardboard die-cutting process into the negative pressure cavity 3041, and avoid the phenomenon of debris accumulation inside the die-cutting tool 3031; the cavity space of the air collecting cavity 3042 gradually increases, such as Fig.11 As shown, the gas inside the air collecting chamber 3042 is blown toward the die-cutting tool 3031 on the other side through the ventilator 304, so as to clean the die-cutting tool 3031;

[0043] As the ventilator 304 rotates, the synchronization head 316 compresses the reset spring 309 to the limit through the rotating plate 308 on one side of the offset shaft 307, so that the reset spring 309 drives the rotating plate 308 on the other side to press and pass through the corresponding telescopic limit head 315. At this time, under the action of the reset spring 309, the positions of the two rotating plates 308 are transformed into each other. In this process, the debris adsorbed inside the negative pressure chamber 3041 is transferred to the air collecting chamber 3042, and then the fan 312 blows the debris inside the air collecting chamber 3042 out of the air collecting chamber 3042 to avoid residual debris inside the ventilator 304.

[0044] It should be noted that see Fig.12 Since the offset shaft 307 and the rotating plate 308 thereon are eccentrically mounted, when the breather cylinder 304 rotates, the synchronous head 316 on the breather cylinder 304 can only drive the rotating plate 308 on one side of the offset shaft 307 to rotate synchronously.

[0045] See also Figure 5-Figure 6 A plastic protective layer 318 is installed on the vent cylinder 304 , and through holes are opened on the vent cylinder 304 , and the through holes penetrate the plastic protective layer 318 and the vent cylinder 304 respectively.

[0046] It should be noted that the through holes are arranged in four rows, which are divided into two middle rows of holes and ventilation holes on both sides. The two middle rows of holes are in a blocked state, and the ventilation holes on both sides are in a through ventilation state. Therefore, during die-cutting, the cardboard body fits with the two middle rows of holes, and the die-cut part of the edge of the cardboard contacts with the ventilation holes on both sides.

[0047] See also Figure 1-Figure 4 The material setting and pushing assembly 1 includes a box body 101 and a weighing plate 102 installed thereon, a cylinder 104 and a scale frame 103 are installed on the box body 101, and the scale frame 103 is connected to a material blocking plate 106.

[0048] A connecting plate 105 is installed at the output end of the cylinder 104, and a pushing frame 107 is installed on the connecting plate 105. A rotating shaft 108 is rotatably installed inside the pushing frame 107. A front plate 109 and a rear plate 110 are respectively installed on both sides of the rotating shaft 108. The front plate 109 is connected to the pushing frame 107 through a connecting spring 111.

[0049] It should be noted that, since the production line needs to process different types of packaging boxes, the production line needs to place the cardboard on the weighing plate 102 before actual use. The weighing plate 102 will first weigh the cardboard to determine the number of cardboards placed on the weighing plate 102, and then measure the overall height of the cardboard on the weighing plate 102 through the scale on the scale frame 103, and then deduce the thickness of a single cardboard, and then adjust the height of the baffle plate 106 to ensure that only a single cardboard can pass through the bottom of the baffle plate 106 at a time to ensure the die-cutting quality. The above steps can be completed by automation, that is, the scale frame 103 is replaced by a laser sensor, the baffle plate 106 is connected to the external controller through a telescopic rod, the cardboard weight information of the weighing plate 102 and the cardboard height information measured by the laser sensor are transmitted to the external controller, and the external controller sends a control signal to the telescopic rod to adjust the height of the baffle plate 106 through the telescopic rod, wherein the working principles of the external controller and the laser sensor are both prior art, and the present invention does not repeat them, which does not affect the integrity of the present invention.

[0050] When the fixed material pushing component 1 is in working state, the cylinder 104 pushes the cardboard at the bottom of the weighing plate 102 onto the conveyor belt 2. Since the weight of the cardboard will be all accumulated on the bottom cardboard, in this process, the cylinder 104 not only pushes the bottom cardboard to move, but also drives the cardboard above the bottom to move toward the baffle plate 106, so that the cardboard on the weighing plate 102 will exert lateral pressure on the baffle plate 106. In the long run, the baffle plate 106 will inevitably become loose, resulting in changes in the bottom size of the baffle plate 106, and it is impossible to ensure that a single cardboard passes through the bottom of the baffle plate 106;

[0051] When the cylinder 104 in the present invention pushes the cardboard onto the conveyor belt 2, the front plate 109 inside the push frame 107 will first contact the cardboard above the bottom layer. As the cylinder 104 runs, the connecting spring 111 is compressed, the front plate 109 rotates inside the push frame 107, and the rear plate 110 rotates outside the push frame 107. At the same time, the front plate 109 sticks the cardboard above the bottom layer onto the baffle plate 106; as the rear plate 110 rotates outside the push frame 107, the rear plate 110 starts to push the bottom layer of cardboard out of the bottom of the baffle plate 106 and transports the cardboard to the die-cutting machine 3 by the conveyor belt 2, ensuring that when the size of the bottom of the baffle plate 106 changes, the cylinder 104 can still transport a single cardboard, thereby ensuring the die-cutting quality of the die-cutting machine 3.

[0052] See also Figure 1 The conveyor belt 2 5 includes a plurality of strip-shaped feeding belts 501 , and a waste box 502 is installed at the bottom of the plurality of strip-shaped feeding belts 501 .

[0053] It should be noted that, when the die-cut cardboard is conveyed to the printing machine 4 through a plurality of strip feeding belts 501 , the distance between the strip feeding belts 501 can further separate the cardboard body and the scraps, ensuring that the conveyor belt 2 5 can further separate the scraps on the cardboard.

[0054] The implementation principle of the present invention is:

[0055] When in use, place the cardboard on the weighing plate 102, which will first weigh the cardboard to determine the number of cardboards placed on the weighing plate 102, then measure the overall height of the cardboard on the weighing plate 102 through the scale on the scale frame 103, and then deduce the thickness of a single cardboard, then adjust the height of the baffle plate 106 to ensure that only a single cardboard can pass through the bottom of the baffle plate 106 at a time, and then push the cardboard onto the conveyor belt 2 through the cylinder 104, and the front plate 109 inside the push frame 107 will first contact the cardboard above the bottom layer, and as the cylinder 1 04 is running, the connecting spring 111 is compressed, the front plate 109 rotates toward the inside of the push frame 107, and the rear plate 110 rotates toward the outside of the push frame 107. At the same time, the front plate 109 sticks the cardboard above the bottom layer onto the baffle plate 106; as the rear plate 110 rotates toward the outside of the push frame 107, the rear plate 110 starts to push the bottom layer of cardboard out of the bottom of the baffle plate 106 and the cardboard is transported to the die-cutting machine 3 by the conveyor belt 2, ensuring that when the size of the bottom of the baffle plate 106 changes, the cylinder 104 can still transport a single cardboard, thereby ensuring the die-cutting quality of the die-cutting machine 3.

[0056] When a single cardboard is transported to the die-cutting machine 3 for die-cutting via the conveyor belt 2, the cardboard enters between the knife roller 303 and the ventilator 304. During this process, the knife roller 303 uses the die-cutting tool 3031 to die-cut the cardboard. At the same time, the negative pressure provided by the negative pressure machine 311 to the negative pressure chamber 3041 adsorbs the die-cutting scraps of the cardboard on the ventilator 304. As the knife roller 303 and the ventilator 304 rotate, the cardboard die-cutting is completed. The die-cut cardboard body is transported to the printing machine 4 for printing via the conveyor belt 2 5. When the scraps adsorbed on the ventilator 304 rotate to the bottom of the ventilator 304, the gas provided by the fan 312 to the air collecting chamber 3042 blows down the scraps adsorbed on the ventilator 304, so as to separate the cardboard body from the scraps and avoid the problem of the cardboard scraps being stuck in the die-cutting opening of the cardboard.

[0057] For details, see Figure 9-11As shown, during the process of the cardboard entering between the knife roller 303 and the air cylinder 304 (during the cardboard die-cutting process), the synchronous head 316 on the air cylinder 304 first contacts the rotating plate 308 on one side of the offset shaft 307. As the air cylinder 304 rotates, the air cylinder 304 drives the rotating plate 308 on one side of the offset shaft 307 to rotate along the offset shaft 307 through the synchronous head 316. During this process, the rotating plate 308 driven by the synchronous head 316 presses and passes through the corresponding telescopic limiting head 315. As the air cylinder 304 rotates, the synchronous head 316 drives the rotating plate 308 on one side of the offset shaft 307 to rotate toward the rotating plate 308 on the other side. Since the rotating plate 308 on the other side is limited by the corresponding telescopic limiting head 315, the reset spring 309 between the rotating plates 308 close to each other is compressed, and the reset spring 309 between the rotating plates 308 far away from each other is stretched.

[0058] In this process, see Figure 10-11 , the cavity space of the negative pressure cavity 3041 gradually decreases, and the cavity space of the air collecting cavity 3042 gradually increases; the cavity space of the negative pressure cavity 3041 decreases, that is, the adsorption force of the negative pressure cavity 3041 on the cardboard scraps increases, so that the ventilator 304 can adsorb smaller or strip-shaped scraps, and improve the separation strength between the cardboard body and the corners. At the same time, the increase in the adsorption force of the negative pressure cavity 3041 can effectively absorb the debris generated during the cardboard die-cutting process into the negative pressure cavity 3041, and avoid the phenomenon of debris accumulation inside the die-cutting tool 3031; the cavity space of the air collecting cavity 3042 gradually increases, such as Fig.11 As shown, the gas inside the air collecting chamber 3042 is blown toward the die-cutting tool 3031 on the other side through the ventilator 304, so as to clean the die-cutting tool 3031;

[0059] As the ventilator 304 rotates, the synchronization head 316 compresses the reset spring 309 to the limit through the rotating plate 308 on one side of the offset shaft 307, so that the reset spring 309 drives the rotating plate 308 on the other side to press and pass through the corresponding telescopic limit head 315. At this time, under the action of the reset spring 309, the positions of the two rotating plates 308 are transformed into each other. In this process, the debris adsorbed inside the negative pressure chamber 3041 is transferred to the air collecting chamber 3042, and then the fan 312 blows the debris inside the air collecting chamber 3042 out of the air collecting chamber 3042 to avoid residual debris inside the ventilator 304.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A fully automatic production line for packaging box production, characterized by: The invention comprises a material setting and pushing component (1), a die-cutting machine (3) and a printing machine (4); the material setting and pushing component (1) and the die-cutting machine (3) are connected via a conveyor belt 1 (2); and the die-cutting machine (3) and the printing machine (4) are connected via a conveyor belt 2 (5); The die-cutting machine (3) comprises a base frame (302) and a knife roller (303) and a ventilator (304) mounted thereon; a motor (305) for driving the knife roller (303) and the ventilator (304) to rotate is mounted on the base frame (302); a sealing plate (306) is fixedly mounted on the base frame (302); the sealing plate (306) blocks both ends of the ventilator (304); an eccentrically arranged offset shaft (306) is mounted on the sealing plate (306); 7), rotating plates (308) are rotatably mounted on both sides of the offset shaft (307), and the rotating plates (308) are symmetrically arranged along the offset shaft (307), telescopic limit heads (315) are respectively mounted on both sides of the sealing plate (306), and the telescopic limit heads (315) are symmetrically arranged along the center of the offset shaft (307), the rotating plates (308) respectively abut against the telescopic limit heads (315), and the rotating plates (308) are connected by reset springs (309); The rotating plate (308) divides the ventilation cylinder (304) into a negative pressure chamber (3041) and an air collecting chamber (3042). A negative pressure machine (311) and a fan (312) are installed on the base frame (302). The negative pressure machine (311) and the fan (312) are connected to the negative pressure chamber (3041) and the air collecting chamber (3042) respectively. A synchronization head (316) is installed on the inner wall of the ventilation cylinder (304). The synchronization head (316) contacts the rotating plate (308). A sealing scraper (317) is installed on the rotating plate (308). The sealing scraper (317) fits the inner wall of the ventilation cylinder (304).

2. The fully automatic production line for producing packaging boxes according to claim 1 is characterized by: The sealing plate (306) is provided with a negative pressure port (313) and an air supply port (314), the negative pressure port (313) and the air supply port (314) are respectively located in the negative pressure chamber (3041) and the air collecting chamber (3042), and the negative pressure machine (311) and the air fan (312) are connected to the negative pressure port (313) and the air supply port (314) via a pipeline.

3. The fully automatic production line for producing packaging boxes according to claim 1 is characterized by: A plastic protective layer (318) is installed on the vent cylinder (304), and through holes are opened on the vent cylinder (304), and the through holes penetrate the plastic protective layer (318) and the vent cylinder (304) respectively.

4. The fully automatic production line for producing packaging boxes according to claim 1 is characterized by: The knife roller (303) comprises a die-cutting knife plate (3032) and a die-cutting tool (3031), and the die-cutting tool (3031) is installed on the die-cutting knife plate (3032).

5. The fully automatic production line for producing packaging boxes according to claim 1 is characterized by: The material setting and pushing assembly (1) comprises a box body (101) and a weighing plate (102) mounted thereon, a cylinder (104) and a scale frame (103) are mounted on the box body (101), and the scale frame (103) is connected to a material blocking plate (106).

6. The fully automatic production line for producing packaging boxes according to claim 5, characterized in that: A connecting plate (105) is installed at the output end of the cylinder (104), a pushing frame (107) is installed on the connecting plate (105), a rotating shaft (108) is rotatably installed inside the pushing frame (107), a front plate (109) and a rear plate (110) are respectively installed on both sides of the rotating shaft (108), and the front plate (109) is connected to the pushing frame (107) via a connecting spring (111).

7. The fully automatic production line for producing packaging boxes according to claim 1, characterized in that: The conveyor belt 2 (5) comprises a plurality of strip-shaped feeding belts (501), and waste boxes (502) are installed at the bottom of the plurality of strip-shaped feeding belts (501).

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