Diaper Packaging Production Line and Manufacturing Process

Abstract

This invention relates to the field of packaging equipment technology, specifically to a diaper packaging production line and manufacturing process. The line includes a conveyor line, an adsorption feeding production line, and a bag-opening production line. The conveyor line includes a block conveyor belt. The adsorption feeding production line includes an adsorption mechanism, a vacuum conveyor belt, and a coding mechanism. The adsorption mechanism includes a transverse feeding mechanism and a longitudinal feeding mechanism. The bag-opening production line includes a negative pressure bag-opening mechanism, which includes negative pressure suction nozzles symmetrically arranged vertically. This invention provides a diaper packaging production line and manufacturing process that can solve the problem of low production efficiency in existing packaging technologies.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, specifically to a diaper packaging production line and production process. Background Technology

[0002] In the packaging production process of diaper bags, a robotic arm with negative pressure suction generally moves along the X and Z axes to grab the diaper bag from the conveyor line onto the vacuum conveyor belt, and then the vacuum conveyor belt transports it to the opening mechanism, where the bag is opened and sent to the next process.

[0003] As in the prior art, publication number CN2826710Y discloses a lithium battery coating machine, which includes a robotic arm with X-axis and Z-axis degrees of freedom, a vacuum suction cup set at the bottom of the robotic arm, and a feeding mechanism. It uses the movement of the robotic arm on the X-axis and Z-axis to grasp the packaging film.

[0004] However, the existing technology still has the following technical problems:

[0005] 1. The robotic arm takes a long time to make one round trip, resulting in low efficiency for repeated gripping.

[0006] 2. The conveyor line generally uses a mode of conveying single packaging bags sequentially, which results in an insufficient number of packaging bags that can be continuously gripped, increasing the gripping waiting time and reducing gripping efficiency;

[0007] 3. The holes on the negative pressure suction nozzles of the existing technology cannot be adjusted as needed, making them unsuitable for the production of other types of packaging bags, resulting in poor overall versatility of the packaging production line. Summary of the Invention

[0008] This invention provides a diaper packaging production line and manufacturing process, which can solve the problem of low packaging production efficiency in existing technologies.

[0009] This application provides the following technical solution:

[0010] A diaper packaging production line includes a conveyor line, an absorbent feeding line, and a bag-making line.

[0011] The conveyor line includes a block conveyor belt, which comprises two sets of parallel drive chains.

[0012] Multiple positioning blocks are fixed sequentially on the transmission chain. Positioning rods and positioning stops are detachably connected to the positioning blocks. Multiple packaging bags can be fitted onto the positioning rods, and the packaging bags are located between the positioning stops.

[0013] The adsorption feeding production line includes an adsorption mechanism, a vacuum conveyor belt, and a coding mechanism; the vacuum conveyor belt is perpendicular to the block conveyor belt, and a toothed transition plate is provided at the end of the vacuum conveyor belt; the adsorption mechanism is set on a fixed plate on the side of the vacuum conveyor belt, and the adsorption mechanism includes a transverse feeding mechanism and a longitudinal feeding mechanism.

[0014] The longitudinal feeding mechanism is equipped with multiple first suction nozzles. The first suction nozzles can reciprocate longitudinally and can contact the packaging bag. The closest distance between the first suction nozzle and the end of the packaging bag is 32mm-35mm.

[0015] The transverse feeding mechanism is equipped with multiple second suction nozzles, which can reciprocate in the transverse direction. The ratio of the transverse distance between the relay position of the second suction nozzle and the first suction nozzle to the width of the packaging bag is 3:40.

[0016] There is a height difference between the first and second adsorption nozzles, and the air pressure introduced into the first and second adsorption nozzles is 2000mmH2O-3500mmH2O.

[0017] Technical principle:

[0018] 1. The robotic arm that moves along the X and Z axes is divided into two separate gripping units that move along the X and Z axes respectively. The two gripping units take turns gripping the packaging bag, which saves the time of the robotic arm's reciprocating motion and thus improves gripping efficiency.

[0019] 2. By transporting multiple packaging bags together to a fixed location, the waiting time for grasping is reduced, thereby improving grasping efficiency.

[0020] Beneficial effects:

[0021] 1. Block conveyor belt: Two sets of parallel chains can be used to install positioning blocks. The two sets of positioning blocks can be equipped with positioning rods and positioning stops respectively. One positioning cylinder and two positioning stops form a packaging bag placement position. Multiple perforated packaging bags are placed on the positioning rods, so that the packaging bags are located between the two positioning stops. This can effectively position and transport the packaging bags. Multiple packaging bags in the packaging bag placement position can be gripped multiple times by the negative pressure suction nozzle, thereby reducing the waiting time of the negative pressure suction nozzle and improving production efficiency.

[0022] 2. Adsorption feeding production line, including adsorption mechanism, vacuum conveyor belt, and inkjet printing mechanism. The vacuum conveyor belt is perpendicular to the block conveyor belt, which facilitates the adsorption nozzle to grab the packaging bag from the block conveyor belt. The toothed transition plate at the end of the vacuum conveyor belt can help support the packaging bag so that the negative pressure suction nozzle can adsorb the packaging bag and open it. The adsorption mechanism is set on the fixed plate, which can help the adsorption nozzle to operate stably.

[0023] 3. The longitudinal feeding mechanism is equipped with multiple suction nozzles. The closest distance between the first suction nozzle and the end of the packaging bag is 32mm-35mm, which can ensure that the packaging bag is effectively suctioned and the packaging bag will not shift.

[0024] 4. Multiple suction nozzles are set on the transverse feeding mechanism. The ratio of the transverse distance between the relay position of the second suction nozzle and the first suction nozzle to the width of the packaging bag is 3:40, which can prevent interference between the two suction nozzles.

[0025] 5. The height difference between the first and second suction nozzles is 3-5mm, which can effectively transfer the packaging bag on the first suction nozzle to the second packaging bag; the negative pressure introduced into the first and second suction nozzles is 2000mmH2O-3500mmH2O, which can ensure sufficient suction to grab the packaging bag.

[0026] Furthermore, the longitudinal feeding mechanism includes a first motor, a reducer, a first synchronous belt, a first synchronous gear, a mounting plate, a first guide rail on the mounting plate, and a first slider slidably connected to the guide rail; a first toothed plate is fixedly connected to the bottom of the first slider, and a plurality of first suction nozzles are provided on the toothed plate;

[0027] The transverse feeding mechanism includes a bracket, a second guide rail mounted on the bracket, and a second slider slidably connected to the guide rail; the bracket is fixed on a fixed plate, the second slider is provided with a second toothed plate, and the second toothed plate is provided with multiple second suction nozzles;

[0028] The second toothed plate of the transverse feeding structure meshes with the first toothed plate of the longitudinal feeding mechanism.

[0029] Beneficial effects:

[0030] 1. The longitudinal feeding mechanism has a first motor mounted on a reducer, which can match the speed of the first motor to the lifting of the suction nozzle, while maintaining the advantage of the first motor in precisely controlling the lifting distance; the first synchronous belt is fixedly connected to the first slider, which allows the slider to slide on the first guide rail when the first motor rotates.

[0031] The first toothed plate fixedly connected to the slider can be used to install the suction nozzle and cooperate with the second toothed plate to complete the transfer of the packaging bag adsorbed by the first suction nozzle to the second suction nozzle; the multiple suction nozzles on the toothed plate can ensure that the adsorption area is sufficient and prevent the adsorbed packaging bag from falling off during the transfer due to unstable adsorption.

[0032] 2. The transverse feeding mechanism has a bracket fixed on a fixed plate for setting up a second guide rail and a second slider. The second suction nozzle on the second toothed plate on the second slider can be used on the vacuum conveyor belt carrying the packaging bags that will be fed from the longitudinal feeding mechanism. The first toothed plate and the second toothed plate mesh with each other, and the first suction nozzle and the second suction nozzle are flush to ensure the effective transfer of the packaging bag from the first suction nozzle to the second suction nozzle, preventing the packaging bag from falling off during the transfer process.

[0033] Furthermore, the coding mechanism includes a spray bar fixed on the conveyor belt, a coding machine connected to the spray bar, and a detection sensor fixed on the vacuum conveyor belt.

[0034] Beneficial effects: The inkjet printing mechanism uses detection sensors to sequentially print codes on packaging bags transported on a vacuum conveyor belt.

[0035] Furthermore, the bag-opening production line is located at the end of the vacuum conveyor belt. The bag-opening production line includes a negative pressure bag-opening mechanism, which includes negative pressure suction nozzles symmetrically arranged vertically, a rotating arm for installing the negative pressure suction nozzles, a movable plate, a rotating mechanism, and a linear motion mechanism. The negative pressure suction nozzles are mounted on a hollow shaft at one end of the rotating arm, and the other end of the hollow shaft is connected to a negative pressure air source. The negative pressure suction nozzles are connected to the hollow shaft. A rotating shaft is fixedly connected to the other end of the rotating arm. The rotating shaft is rotatably connected to the movable plate. The middle part of the rotating shaft is slidably connected to a slotted hole on the fixed plate. The end of the rotating shaft is fixedly connected to the rotating mechanism. The movable plate is connected to the linear motion mechanism.

[0036] Beneficial effects: In the bag-opening production line, the negative pressure bag-opening mechanism, with its symmetrically arranged negative pressure suction nozzles, allows the bags on the transition plate to open as the rotating arm rotates. The hollow shaft is used to introduce negative pressure into the suction nozzles and mount them onto the rotating arm. The rotating mechanism at the end of the rotating shaft uses a crank-slider mechanism to convert the rotation of the first motor into linear motion, and then uses a linkage mechanism to convert the linear motion into the rotation of the two rotating shafts, thus completing the bag-opening action. The movable plate is used to mount the rotating shaft and to enable the rotating shaft to move linearly under the drive of the linear motion mechanism, thereby allowing the bag opened by the negative pressure suction nozzle to complete the linear motion.

[0037] Furthermore, the multiple suction nozzles on the first and second toothed plates are all disposed on the teeth of the toothed plates.

[0038] Beneficial effect: This setup ensures that all suction nozzles are in a straight line when the two toothed plates mesh, which is beneficial for completing the relay action.

[0039] Furthermore, one end of the mounting plate is fixed to the fixing plate, the reducer is fixed to one side of the mounting plate, the power output shaft of the reducer passes through the mounting plate, the first synchronous gear on the power output shaft of the reducer cooperates with the first synchronous gear on the mounting plate to install the first synchronous belt, the first motor is mounted on the reducer, the first guide rail is set on both sides of the first synchronous gear, and the first slider is fixedly connected to the first synchronous belt.

[0040] Beneficial effects: The first motor is mounted on the reducer, which can match the speed of the first motor to the lifting of the suction nozzle, while maintaining the advantage of the first motor in accurately controlling the lifting distance; the first synchronous belt is fixedly connected to the first slider, which allows the slider to slide on the first guide rail when the first motor rotates.

[0041] Furthermore, the detection sensor is a color mark sensor.

[0042] Beneficial effects: Color mark sensors can detect packaging bags of different colors as needed and transmit detection signals.

[0043] Furthermore, the negative pressure nozzle is provided with multiple through holes, and airtight tape is provided on the through holes of the negative pressure nozzle.

[0044] Beneficial effects: By sealing the through holes with airtight tape, the adsorption area of ​​the negative pressure nozzle can be changed, thus enabling the negative pressure nozzle to meet the adsorption needs of different types of packaging bags.

[0045] Furthermore, the positioning block is L-shaped, and there are strip holes on both sides of the L-shape on the block.

[0046] Beneficial effect: The L-shaped positioning block has a slotted hole, which facilitates the installation and adjustment of the positioning block.

[0047] The present invention also provides a manufacturing process, comprising the following steps:

[0048] (1) Place multiple perforated diaper packaging bags onto the positioning rod and position them between two positioning blocks;

[0049] (2) Start the block conveyor belt and transport the diaper packaging bag to the end of the vacuum conveyor belt, then the block conveyor belt is on standby;

[0050] (3) Longitudinal bag gripping: The longitudinal feeding mechanism is started and moves downward to the top of the diaper packaging bag. The first suction nozzle is supplied with negative pressure and the first diaper packaging bag is adsorbed. Then the first motor is started, which makes the first suction nozzle shake up and down rapidly to eliminate the static electricity on the diaper packaging bag. After that, the first suction nozzle rises.

[0051] (4) Lateral bag feeding: After the first suction nozzle rises to the relay position, the second suction nozzle is supplied with negative pressure to absorb the first diaper bag. The first suction nozzle disconnects the negative pressure and descends to repeat the longitudinal bag gripping step. At the same time, the second suction nozzle moves laterally to transport the first diaper bag to the vacuum conveyor belt. After the detection sensor on the vacuum conveyor belt detects the first diaper bag, the vacuum conveyor belt starts the negative pressure to absorb the first diaper bag and transport it forward.

[0052] (5) When the detection sensor detects that the first diaper bag on the vacuum conveyor belt has been conveyed away, the second suction nozzle places the second diaper bag on the vacuum conveyor belt and repeats the above steps (1)-(5) to grab multiple diaper bags on the block conveyor belt onto the vacuum conveyor belt.

[0053] (6) After all the diaper bags on the block conveyor belt have been grabbed, start the block conveyor belt and fix the next set of diaper bags in position for grabbing. The block conveyor belt is then put into standby mode again.

[0054] (7) Coding: During the process of conveying the diaper packaging bag on the vacuum conveyor belt, the detection sensor starts to detect the packaging bag and delays for a few seconds to control the inkjet printer to spray code on the diaper packaging bag from the spray bar.

[0055] (8) Zhang's bag and its contents:

[0056] 1) The diaper packaging bags that have been inkjet printed are conveyed to the transition plate at the end of the vacuum conveyor belt. Multiple holes on the negative pressure nozzle are selectively sealed by an airtight tape so that the adsorption area formed by the holes in the middle can meet the adsorption opening action of different types of packaging bags.

[0057] 2) The rotating mechanism of the diaper bag production line rotates and the rotating arm closes, and negative pressure is introduced into the negative pressure nozzle. The negative pressure nozzles, which are symmetrically arranged at the top and bottom, adsorb the top and bottom of the diaper bag. The rotating mechanism rotates and the rotating arm separates, separating the top and bottom of the bag adsorbed by the negative pressure nozzle, so that the bag opens. The linear motion mechanism drives the movable plate to move linearly, which in turn drives the rotating arm on the movable plate to move linearly, so that the negative pressure nozzle adsorbing the opened bag is sent linearly to the next process.

[0058] Beneficial effects:

[0059] 1. By using a conveyor belt with stops, multiple perforated packaging bags can be fitted onto the positioning rod at one time, thereby reducing the waiting time for the first suction nozzle to pick up the packaging bags and improving processing efficiency.

[0060] 2. After the first suction nozzle grabs the packaging bag, it shakes up and down, which can effectively eliminate the static electricity between the packaging bags stacked on the conveyor belt with baffles, and prevent the packaging bags from sticking together. This prevents the lower part of the grabbed packaging bag from being pulled out by static electricity and scattered on the conveyor belt.

[0061] 3. By using the first motor in conjunction with the reducer as the power source for the longitudinal bag gripping, the lifting distance of the first suction nozzle can be more precise, thereby improving the gripping efficiency.

[0062] 4. By utilizing the meshing of the first toothed plate and the second toothed plate, and setting a height difference between the first toothed plate and the second toothed plate at their relay positions, the packaging bag is effectively transferred from the first toothed plate to the second toothed plate, ensuring an effective gripping effect, improving gripping efficiency, and reducing the time wasted by a single robotic arm gripping during the round trip. Compared with the prior art, this application increases the number of packaging bags gripped per minute from 30 to about 40.

[0063] 5. By utilizing the detection effect of the detection sensor, the coordinated transfer of the packaging bag from the second suction nozzle to the vacuum conveyor bag is effectively guaranteed, and the effective coding of the packaging bag is also guaranteed.

[0064] 6. By placing airtight tape on the hole of the negative pressure nozzle, the adsorption area can be effectively adjusted, so that the negative pressure nozzle can be used to grip different types of packaging bags. Attached Figure Description

[0065] Figure 1 This is a schematic diagram of the structure of the diaper packaging production line and production process of the present invention, in embodiment one.

[0066] Figure 2 This is a top view of the longitudinal feeding mechanism of the diaper packaging production line and production process embodiment one of the present invention;

[0067] Figure 3 This is a top view of the transverse feeding mechanism of the diaper packaging production line and production process embodiment one of the present invention;

[0068] Figure 4 This is the negative pressure bag-opening mechanism of the diaper packaging production line and production process embodiment one of the present invention. Detailed Implementation

[0069] The following detailed description illustrates the specific implementation method:

[0070] The markings in the accompanying drawings include: block conveyor belt 1, positioning block 11, positioning rod 12, positioning stop 13, longitudinal feeding mechanism 2, first motor 21, reducer 22, first synchronous belt 23, mounting plate 24, first guide rail 25, first slider 26, first synchronous gear 27, first toothed plate 28, first suction nozzle 29, transverse feeding mechanism 3, bracket 31, second guide rail 32, second slider 33, second motor 34, second synchronous belt 35, second synchronous gear 36, second toothed plate 37, second suction nozzle 38, vacuum conveyor belt 4, toothed transition plate 41, inkjet printing mechanism 5, spray bar 51, inkjet printer 52, detection sensor 53, negative pressure bag opening mechanism 6, negative pressure suction nozzle 61, hollow shaft 62, rotating arm 63, rotating shaft 64, movable plate 65, packaging bag 7, and fixed plate 8.

[0071] Example 1

[0072] like Figure 1 As shown, the diaper packaging production line includes a conveyor line, an absorbent feeding line, and a bag-making line.

[0073] The conveyor line includes a block conveyor belt 1, which includes two sets of parallel transmission chains and a conveyor belt frame. A motor is fixed to one end of the conveyor belt frame, and two gears are fixed to the motor's power output shaft. One end of each of the two sets of transmission chains meshes with the two gears, and the other end meshes with two gears that are also parallel to each other and rotatably connected to the conveyor belt frame. Multiple positioning blocks 11 are bolted to the chains in sequence. Threaded holes are opened on the top of the positioning blocks 11. Positioning rods 12 and positioning stops 13 are detachably connected to the positioning blocks 11. The ends of the positioning rods 12 are threaded and are threaded to the positioning blocks 11. The positioning stops 13 are L-shaped, and slotted holes are opened on both sides of the L-shape. Screws are used to fix the L-shaped positioning stops 13 to the positioning blocks 11 through the slotted holes. Multiple packaging bags can be fitted onto the positioning rods, and the packaging bags are located between the positioning stops.

[0074] The adsorption feeding production line includes an adsorption mechanism, a vacuum conveyor belt 4, and a coding mechanism 5. The vacuum conveyor belt 4 is perpendicular to the block conveyor belt 1. A toothed transition plate 41 is provided at the end of the vacuum conveyor belt 4. One tooth is provided in the middle of one end of the toothed transition plate 41, and three teeth are provided on each side. The tooth in the middle is spaced far from the three teeth on the sides, so that after the packaging bag 7 is conveyed from the vacuum conveyor belt 4 to the transition plate, the tooth in the middle can support the middle of the packaging bag 7, and the three teeth on the sides can support the packaging bag 7 when the position of the packaging bag 7 is offset, preventing it from falling. The adsorption mechanism is set on the fixed plate 8 on the side of the vacuum conveyor belt 4. The adsorption mechanism includes a transverse feeding mechanism 3 and a longitudinal feeding mechanism 2.

[0075] like Figure 2As shown, the longitudinal feeding mechanism 2 includes a first motor 21, a reducer 22, a first synchronous belt 23, a first synchronous gear 27, a mounting plate 24, a first guide rail 25 on the mounting plate 24, and a first slider 26 slidably connected to the guide rail. A first toothed plate 28 is fixedly connected to the bottom of the slider with bolts. Multiple first suction nozzles 29 are provided on the toothed plate. The first suction nozzles can reciprocate longitudinally and can contact the packaging bag. The closest distance between the center point of the first suction nozzle and the end of the packaging bag is 32mm-35mm. In this embodiment, 32mm is selected as the optimal suction distance to ensure that the suction nozzles can achieve a good gripping effect on the packaging bag. After experimental comparison, it was found that when the gripping distance is less than 32mm, the packaging bag is prone to fall when it is transferred from the first suction nozzle to the second suction nozzle, and the arrangement effect of the packaging bag on the vacuum conveyor belt is poor. When the gripping distance is greater than 35mm, the packaging bag is prone to bending on the vacuum suction belt after being transferred from the first suction nozzle to the second suction nozzle, resulting in a poor flat placement effect.

[0076] One end of the mounting plate 24 is fixed to the fixing plate 8 with bolts. The reducer 22 is fixed to one side of the mounting plate 24 with bolts. The power output shaft of the reducer 22 passes through the mounting plate 24. A first synchronous gear 27 is provided on the power output shaft of the reducer 22 and cooperates with the first synchronous gear 27 provided on the mounting plate 24 to install the first synchronous belt 23. The first motor 21 is mounted on the reducer 22. The first guide rail 25 is provided on both sides of the first synchronous gear 27. The first slider 26 is fixedly connected to the first synchronous belt 23 with bolts.

[0077] like Figure 3 As shown, the transverse feeding mechanism 3 includes a bracket 31, a second guide rail 32 mounted on the bracket 31, and a second slider 33 slidably connected to the guide rail. The bracket 31 is fixed on a fixed plate 8. A second toothed plate 37 is mounted on the second slider 33, and multiple second suction nozzles 38 are mounted on the second toothed plate 37. The second toothed plate 37 of the transverse feeding mechanism 3 meshes with the first toothed plate 28 of the longitudinal feeding mechanism 2. There is a height difference of 3-5 mm between the first and second suction nozzles. Specifically, the first suction nozzle 29 on the first toothed plate 28 is positioned higher than the second toothed plate 38. In this embodiment, the handover position of the second suction nozzle 38 is preferably 3mm in height. This setting can ensure a good handover effect and a high handover efficiency. The ratio of the lateral distance between the handover position of the second suction nozzle and the first suction nozzle to the width of the packaging bag is 3:40. This setting can ensure that the suction nozzles do not interfere with each other and that the total suction area formed by the multiple suction nozzles of the longitudinal gripping mechanism and the lateral gripping mechanism is sufficient to suction and grip the packaging bag. This ensures that the first suction nozzle 29 can effectively hand over the packaging bag 7 to the second suction nozzle 38.

[0078] Multiple suction nozzles on the first toothed plate 28 and the second toothed plate 37 are all set on the teeth of the toothed plates. Specifically, the first toothed plate 28 and the second toothed plate 37 are each provided with 5 teeth, and 5 suction nozzles are correspondingly set on the teeth. The suction nozzles are set at one end of a rigid tube with external threads. The rigid tube can be a steel pipe. The two are threaded together. The rigid tube passes through the through hole provided on the toothed plate. Two nuts are threaded to the rigid tube. The two nuts hold the hollow rod on the teeth. The other end of the rigid tube is supplied with a negative pressure of 2000mmH2O-3500mmH2O. The pressure value within this range can ensure a good gripping effect on the packaging bag.

[0079] The coding mechanism 5 includes a spray bar 51 fixed on a conveyor belt, a coding machine 52 connected to the spray bar 51, and a detection sensor 53 fixed on a vacuum conveyor belt 4. In this embodiment, the detection sensor 53 is a color mark sensor.

[0080] like Figure 4 As shown, the bag-opening production line is located at the end of the vacuum conveyor belt 4. The bag-opening production line includes a negative pressure bag-opening mechanism 6. The negative pressure bag-opening mechanism 6 includes negative pressure suction nozzles 61 arranged symmetrically at the top and bottom, a rotating arm 63 for installing the negative pressure suction nozzles 61, a movable plate 65, a rotating mechanism, and a linear motion mechanism. The negative pressure suction nozzles 61 are installed on a hollow shaft 62 at one end of the rotating arm 63. The other end of the hollow shaft 62 is connected to a negative pressure air source. The negative pressure suction nozzles 61 are connected to the hollow shaft 62. The negative pressure suction nozzles 61 are provided with multiple through holes. An airtight tape is provided on the through holes of the negative pressure suction nozzles 61. A rotating shaft 64 is fixedly connected to the other end of the rotating arm 63. The rotating shaft 64 is rotatably connected to the movable plate 65. The middle part of the rotating shaft 64 is slidably connected to a strip hole opened on the fixed plate 8. The end of the rotating shaft 64 is fixedly connected to the rotating mechanism. The movable plate 65 is connected to the linear motion mechanism.

[0081] The production process includes the following steps:

[0082] (1) Place multiple perforated diaper packaging bags 7 onto the positioning rod 12 and place them between two positioning blocks 13;

[0083] (2) Start the block conveyor belt 1, and after conveying the diaper packaging bag 7 to the end of the vacuum conveyor belt 4, the block conveyor belt 1 stands by.

[0084] (3) Longitudinal bag gripping: The longitudinal feeding mechanism 2 is started and moves downward to the top of the diaper packaging bag 7. At a position 32mm-35mm away from the top of the packaging bag 7, the first suction nozzle 29 is supplied with a negative pressure of 2000mmH2O-3500mmH2O. After the first diaper packaging bag 7 is adsorbed, the first motor 21 is started, which makes the first suction nozzle 29 shake up and down rapidly. After eliminating the static electricity on the diaper packaging bag 7, the first suction nozzle 29 rises.

[0085] (4) Lateral bag feeding: After the first suction nozzle 29 rises to the relay position, the second suction nozzle 38 is supplied with negative pressure to absorb the first diaper packaging bag 7. The first suction nozzle 29 disconnects the negative pressure and descends to repeat the longitudinal bag gripping step. At the same time, the second suction nozzle 38 moves laterally to transport the first diaper packaging bag 7 to the vacuum conveyor belt 4. After the detection sensor 53 on the vacuum conveyor belt 4 detects the first diaper packaging bag 7, the vacuum conveyor belt 4 starts the negative pressure to absorb the first diaper packaging bag 7 and transport it forward.

[0086] (5) When the detection sensor 53 detects that the first diaper bag 7 on the vacuum conveyor belt 4 has been conveyed away, the second suction nozzle 38 places the second diaper bag 7 on the vacuum conveyor belt 4 and repeats the above steps (1)-(5) to pick up multiple diaper bags 7 on the block conveyor belt 1 and put them on the vacuum conveyor belt 4.

[0087] (6) After the diaper packaging bags 7 on the block conveyor belt 1 have been grabbed, the block conveyor belt 1 is started to transport the next set of diaper packaging bags 7 to a fixed position for grabbing, and the block conveyor belt 1 is put on standby again.

[0088] (7) Coding: During the process of conveying the diaper packaging bag 7 on the vacuum conveyor belt 4, the detection sensor 53 starts from not detecting the packaging bag 7 and delays for a few seconds to control the inkjet printer 52 to spray code on the diaper packaging bag 7 from the spray bar 51.

[0089] (8) Zhang's bag and its contents:

[0090] 1) The diaper packaging bag 7 that has been inkjet printed is conveyed to the transition plate at the end of the vacuum conveyor belt 4. Multiple holes on the negative pressure suction nozzle 61 are selectively sealed by an airtight tape so that the adsorption area formed by the holes in the middle can meet the adsorption opening action of different types of packaging bags 7.

[0091] 2) The rotating mechanism of the diaper bag production line rotates the rotating arm 63 to close and introduces negative pressure into the negative pressure suction nozzle 61. The negative pressure suction nozzles 61, which are symmetrically arranged at the top and bottom, adsorb the upper and lower surfaces of the diaper bag 7. The rotating mechanism rotates and the rotating arm 63 separates, separating the upper and lower surfaces of the bag 7 adsorbed by the negative pressure suction nozzle 61, so that the bag 7 opens. The linear motion mechanism drives the movable plate 65 to move linearly, thereby driving the rotating arm 63 on the movable plate 65 to move linearly, so that the negative pressure suction nozzle 61 adsorbing the opened bag 7 is sent linearly to the next process.

[0092] The above are merely embodiments of the present invention. The invention is not limited to the fields covered by these embodiments, and common knowledge regarding specific structures and characteristics is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A diaper packaging production line, characterized in that, This includes conveyor lines, adsorption feeding production lines, and bag-forming production lines. The conveyor line includes a block conveyor belt, which includes two sets of parallel transmission chains. Multiple positioning blocks are fixed sequentially on the transmission chains. Positioning rods and positioning stops are detachably connected to the positioning blocks. Multiple packaging bags can be fitted onto the positioning rods, and the packaging bags are located between the positioning stops. The adsorption feeding production line includes an adsorption mechanism, a vacuum conveyor belt, and a coding mechanism; the vacuum conveyor belt is perpendicular to the block conveyor belt, and a toothed transition plate is provided at the end of the vacuum conveyor belt; the adsorption mechanism is set on a fixed plate on the side of the vacuum conveyor belt, and the adsorption mechanism includes a transverse feeding mechanism and a longitudinal feeding mechanism. The longitudinal feeding mechanism is provided with a plurality of first suction nozzles. The first suction nozzles can reciprocate longitudinally and can contact the packaging bag. The closest distance between the center point of the first suction nozzle and the end of the packaging bag is 32mm-35mm. The transverse feeding mechanism is equipped with multiple second suction nozzles, which can reciprocate in the transverse direction. The ratio of the relay position of the second suction nozzle to the transverse distance of the first suction nozzle to the width of the packaging bag is 3:

40. There is a height difference of 3-5mm between the first and second adsorption nozzles, and the negative pressure introduced into the first and second adsorption nozzles is 2000mmH2O-3500mmH2O.

2. The diaper packaging production line according to claim 1, characterized in that: The longitudinal feeding mechanism includes a first motor, a reducer, a first synchronous belt, a first synchronous gear, a mounting plate, a first guide rail on the mounting plate, and a first slider slidably connected to the guide rail; a first toothed plate is fixedly connected to the bottom of the first slider, and a plurality of first suction nozzles are provided on the toothed plate; The transverse feeding mechanism includes a bracket, a second guide rail mounted on the bracket, and a second slider slidably connected to the guide rail; the bracket is fixed on a fixed plate, the second slider is provided with a second toothed plate, and the second toothed plate is provided with a plurality of second suction nozzles; The second toothed plate of the transverse feeding mechanism meshes with the first toothed plate of the longitudinal feeding mechanism.

3. The diaper packaging production line according to claim 2, characterized in that: The coding mechanism includes a spray bar fixed on a conveyor belt, a coding machine connected to the spray bar, and a detection sensor fixed on a vacuum conveyor belt.

4. The diaper packaging production line according to claim 3, characterized in that: The bag-opening production line is located at the end of the vacuum conveyor belt. The bag-opening production line includes a negative pressure bag-opening mechanism. The negative pressure bag-opening mechanism includes negative pressure suction nozzles arranged symmetrically at the top and bottom, a rotating arm for installing the negative pressure suction nozzles, a movable plate, a rotating mechanism, and a linear motion mechanism. The negative pressure suction nozzles are mounted on a hollow shaft at one end of the rotating arm. The other end of the hollow shaft is connected to a negative pressure air source. The negative pressure suction nozzles are connected to the hollow shaft. A rotating shaft is fixedly connected to the other end of the rotating arm. The rotating shaft is rotatably connected to the movable plate. The middle part of the rotating shaft is slidably connected to a strip hole opened on the fixed plate. The end of the rotating shaft is fixedly connected to the rotating mechanism. The movable plate is connected to the linear motion mechanism.

5. The diaper packaging production line according to claim 4, characterized in that: The multiple suction nozzles on the first and second toothed plates are all disposed on the teeth of the toothed plates.

6. The diaper packaging production line according to claim 5, characterized in that: One end of the mounting plate is fixed to the fixing plate, the reducer is fixed to one side of the mounting plate, the power output shaft of the reducer passes through the mounting plate, a first synchronous gear is provided on the power output shaft of the reducer and cooperates with the first synchronous gear provided on the mounting plate to install the first synchronous belt, the first motor is mounted on the reducer, the first guide rail is provided on both sides of the first synchronous gear, and the first slider is fixedly connected to the first synchronous belt.

7. The diaper packaging production line according to claim 6, characterized in that: The detection sensor is a color mark sensor.

8. The diaper packaging production line according to claim 7, characterized in that: The negative pressure suction nozzle is provided with multiple through holes, and the through holes of the negative pressure suction nozzle are provided with airtight tape.

9. The diaper packaging production line according to claim 8, characterized in that: The positioning block is L-shaped, and there are strip holes on both sides of the L-shape.

10. The production process of the diaper packaging production line according to any one of claims 1-9, characterized in that: The production process includes the following steps: (1) Place multiple perforated diaper bags onto the positioning rod and position them between two positioning blocks; (2) Start the block conveyor belt and transport the diaper packaging bag to the end of the vacuum conveyor belt, then the block conveyor belt is on standby; (3) Longitudinal bag gripping: The longitudinal feeding mechanism is started and moves downward to the top of the diaper packaging bag. At the position 32mm-35mm away from the top of the packaging bag, the first suction nozzle is introduced with a negative pressure of 2000mmH2O-3500mmH2O to adsorb the first diaper packaging bag. Then the first motor is started, which makes the first suction nozzle shake up and down rapidly to eliminate the static electricity on the diaper packaging bag. After that, the first suction nozzle rises. (4) Lateral bag feeding: After the first suction nozzle rises to the relay position, the second suction nozzle is supplied with a negative pressure of 2000mmH2O-3500mmH2O to absorb the first diaper bag. The first suction nozzle disconnects the negative pressure and descends to repeat the longitudinal bag grabbing step. At the same time, the second suction nozzle moves laterally to transport the first diaper bag to the vacuum conveyor belt. After the detection sensor on the vacuum conveyor belt detects the first diaper bag, the vacuum conveyor belt starts the negative pressure to absorb the first diaper bag and transport it forward. (5) When the detection sensor detects that the first diaper bag on the vacuum conveyor belt has been conveyed away, the second suction nozzle places the second diaper bag on the vacuum conveyor belt and repeats the above steps (1)-(5) to grab multiple diaper bags on the block conveyor belt onto the vacuum conveyor belt. (6) After all the diaper bags on the block conveyor belt have been grabbed, start the block conveyor belt to transport the next set of diaper bags to a fixed position for grabbing, and the block conveyor belt will be ready to standby again. (7) Coding: During the process of conveying the diaper packaging bag on the vacuum conveyor belt, the detection sensor starts to detect the packaging bag and delays for a few seconds to control the inkjet printer to spray code on the diaper packaging bag from the spray bar. (8) Zhang's bag and its contents: 1) The diaper packaging bags that have been inkjet printed are conveyed to the transition plate at the end of the vacuum conveyor belt. Multiple holes on the negative pressure nozzle are selectively sealed by an airtight tape so that the adsorption area formed by the holes in the middle can meet the adsorption opening action of different types of packaging bags. 2) The rotating mechanism of the diaper bag production line rotates and the rotating arm closes, and negative pressure is introduced into the negative pressure nozzle. The negative pressure nozzles, which are symmetrically arranged at the top and bottom, adsorb the top and bottom of the diaper bag. The rotating mechanism rotates and the rotating arm separates, separating the top and bottom of the bag adsorbed by the negative pressure nozzle, so that the bag opens. The linear motion mechanism drives the movable plate to move linearly, which in turn drives the rotating arm on the movable plate to move linearly, so that the negative pressure nozzle adsorbing the opened bag is sent linearly to the next process.

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