A highly integrated method for automatic tobacco ration boxing

Abstract

The application discloses a highly integrated method for automatically quantitatively packing tobacco into a box, wherein conveying lines formed by splicing a plurality of conveying devices capable of being independently started and stopped are used to gradually transport a tobacco box through two packing stations, a distributing vehicle for packing is used to pack the tobacco box back and forth at the two packing stations, the tobacco box is weighed during the packing process, and the packed tobacco box is compacted, and a platform scale is used to protect the operation during the compacting process; the method for automatically quantitatively packing tobacco into a box has the advantages that the packing process, including packing, compacting and weighing, can be automatically completed at one station with high integration, the design is ingenious, the compacting operation does not affect the weighing data and the weighing instrument, the use process of the platform scale is protected, the service life is prolonged, the damage is reduced, the application of the double-packing stations of the conveying line is realized, the use efficiency is not affected, the equipment investment amount of the production line is reduced, and the size is reduced, and the effects of high integration optimization, high packing efficiency and the like are achieved.

Description

Technical Field

[0001] This invention relates to the field of automated production line loading technology, specifically a highly integrated method for automatic quantitative packing of tobacco shreds. Background Technology

[0002] In existing boxing and packing processes, conveyor belts or conveyors are used to transport the boxes to their positions, and packing carts unload and load the materials. Boxing and packing systems are primarily used in boxed storage production lines in tobacco factories (re-drying plants). They can be custom-designed according to user needs and the production line's process layout to ensure materials are evenly packed into storage boxes in batches, quantities, and as needed, ultimately achieving the storage and transportation function of the materials in boxed form. The boxing and packing system mainly consists of a packing cart, a traveling frame, and a metering system. The existing material feeding principle of the material feeding trolley is to use the reciprocating motion of the material feeding trolley on the traveling frame to evenly distribute the incoming material layer by layer into the empty smoke box below the traveling frame. Therefore, it is usually used in conjunction with a double feeding station. However, in the existing technology, the so-called double feeding station requires two independent conveying mechanisms to split and merge at both ends. Under the interlocking control of the metering system, when the material is distributed to the set quantity, the material feeding trolley stops running and the conveyor transports the full smoke box away. However, this arrangement takes up a lot of space and requires a large number of conveying mechanisms. In fact, the actual utilization rate and packing efficiency are still determined by the material feeding trolley. Therefore, the traditional double conveyor line structure not only occupies space, but also wastes energy and increases material consumption, which are its drawbacks.

[0003] The bidirectional feeding trolley achieves bidirectional material distribution through the forward and reverse rotation of a belt conveyor. The trolley is fed by an upstream conveyor, and the material on the trolley's belt is transported and falls into the downstream tobacco box. Because the trolley's drive unit reciprocates while transporting and discharging material, the material is evenly distributed layer by layer into the tobacco box. After loading, the material in the box often needs to be compacted to facilitate subsequent replenishment and to remove unnecessary air, reducing the volume of tobacco. Furthermore, in traditional production lines, compaction, weighing, and unloading are completed at multiple stations, resulting in a large space requirement. Summary of the Invention

[0004] To address the shortcomings and defects of the existing technologies, the inventors have developed a highly integrated packing method that automatically completes packing, unloading, compaction, and weighing at a single station. Its ingenious design avoids the impact of the compaction action on weighing data and instruments, protecting the weighbridge during operation, extending its lifespan, and reducing damage. Simultaneously, it enables the application of dual unloading stations on a single conveyor line without affecting efficiency, reducing equipment investment and volume on the production line, and achieving optimized integration.

[0005] In the method of this invention, the packing station integrates feeding, compaction, weighing, weighing protection, and conveying functions into one station. Combined with the control system, this allows each functional segment to operate in an orderly manner, achieving overall operation. When the tobacco box arrives at the packing station, the feeding trolley feeds the tobacco shreds into the box. During this process, the weighing mechanism monitors the total weight of the tobacco box in real time. When the weight of the tobacco box reaches a preset value, it indicates that the amount of tobacco shreds fed into the box meets the packing requirements. At this point, the feeding trolley stops feeding and switches to another packing station. During the compaction operation at this packing station, a lifting device drives a pressure head to compact the middle of the tobacco box. This action applies a downward pressure to the entire tobacco box. If the weighing mechanism is still in contact with the tobacco box at this time... If the material is subjected to excessive pressure, it may exceed the weighing limit of the weighing mechanism, potentially damaging the sensor structure. In this invention, a gap-filling method is used in the middle of the conveyor, employing a staggered, nested structure in conjunction with a lifting mechanism. This allows the conveyor to separate from the bottom of the tobacco box during compaction, enabling the bottom of the tobacco box to contact and support the fixed pressure platform before being pressed down by the pressure head. This separation of force transmission ensures the weighing mechanism is unloaded, protecting the scale. After compaction, the lifting base rises, bringing the conveyor surface back into contact with the bottom of the tobacco box, returning it to the conveyor's support. The conveyor then starts, allowing the loaded and compacted material to be weighed or moved out of the packing station to the next stage. On the other hand, the conveyor line is composed of several conveyor devices spliced ​​together. Each conveyor device conveys or stops one smoke box at a time. There is a box-packing station at each end of the fabric carrier, with two conveyor devices in between. Each box-packing station is equipped with a conveyor and they are connected to each other on a conveyor line to form a continuous conveyor line. When one box-packing station is unloading material, the other box-packing station is performing the processes of compaction, weighing protection, box unloading and travel, and empty box forward conveying to position for box packing. This forms a continuous unloading box packing process, realizing the box packing operation of two unloading stations on one conveyor line, and maximizing the material replenishment efficiency of the fabric carrier. It achieves the application of highly integrated equipment without reducing the box packing volume and efficiency. Attached Figure Description

[0006] Figure 1 This is a side view of the structure of the automatic quantitative packing equipment for tobacco used in this invention;

[0007] Figure 2 This is a front view of the automatic quantitative packing equipment for tobacco used in this invention;

[0008] Figure 3 , 4 5 is a three-dimensional structural diagram of the automatic quantitative packing equipment for tobacco used in this invention;

[0009] Figure 6 , 7 A schematic diagram showing the structural changes in the state of the protection mechanism of the weighbridge at the packing station before and after activation.

[0010] Figures 8-11 A schematic diagram illustrating the steps of a method for packing cigarette boxes on a conveyor line according to the present invention;

[0011] Among them: 1—Fabricating trolley, 2—Weighing mechanism, 3—Compacting mechanism, 4—Boxing station, 5—Lifting base plate, 6—Lifting mechanism, 7—Pressure platform, 8—Conveying device or conveyor, 81—Conveying chain, 21—Weighing sensor, 22—Mounting seat, 31—Pressure head, 11—No. 1 smoke box, 12—No. 2 smoke box, 13—No. 3 smoke box, 14—No. 4 smoke box, 41—Second boxing station, 42—First boxing station, 51—Drive chain, 52—Drive rod, 61—Lifting mounting block, 62—Inner plate, 63—Outer plate, 60—Wheel axle rod, 64—Transverse clamping guide wheel, 65—Longitudinal clamping guide wheel, 66—Support rod, 67—Lifting base, 68—Lifting motor, 53—Lifting frame, 54—Lifting sprocket seat, 55—Lifting drive sprocket, 56—Lifting chain, 57—Drive sprocket. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0013] Example 1: A highly integrated method for automatic quantitative packing of tobacco shreds, comprising the following steps:

[0014] Step S1: After detecting that the cigarette box has entered the conveyor of the conveyor line, start the conveyor to transport the first cigarette box forward in sequence until the first cigarette box reaches the conveyor at the No. 1 packing station 42 and then stop.

[0015] Step S2: The fabric cart 1 loads materials into the first packing station 42. After the predetermined amount of materials is reached, the loading stops, and the loading into the second packing station 41 begins.

[0016] Step S3: The weighing protection mechanism of the first packing station 42 is activated, so that the cigarette box is separated from the contact of the weighing mechanism 2 and then compacted to protect the sensor module of the weighing mechanism 2.

[0017] Step S4: After the material carrier 1 finishes loading the second packing station 41, it stops after reaching the predetermined amount of material and starts loading the first packing station 42 again.

[0018] Step S5: The weighbridge protection mechanism of the second packing station 41 is activated, so that the cigarette box is separated from the contact of the weighing mechanism 2 and then compacted to protect the sensor module of the weighing mechanism 2.

[0019] Each conveying device or conveyor 8 conveys or stops one cigarette box at a time. The cigarette boxes entering or leaving the No. 1 and No. 2 packing stations 41 move forward two cigarette box stations each time. The No. 1 packing station 42 loads the odd-numbered cigarette boxes in the order of 1, 3, 5... in sequence. The No. 2 packing station 41 loads the even-numbered cigarette boxes in the order of 4, 6, 8... in sequence.

[0020] In step S3, the weighbridge protection mechanism of the first packing station 42 is activated, which drives the conveyor and weighing mechanism 2 to descend, so that the cigarette box is detached from the surface of the conveyor and supported by the pressure platform 7. The compaction mechanism 3 moves down to compact the tobacco in the cigarette box and then rises to reset. The weighbridge protection mechanism drives the conveyor and weighing mechanism 2 to rise, so that the cigarette box is detached from the pressure platform 7 and returns to the conveyor. The conveyor starts to transport the cigarette box forward, and the next cigarette box enters the first packing station 42 to wait for packing.

[0021] In step S5, the weighbridge protection mechanism of the second packing station 41 is activated, causing the conveyor and weighing mechanism 2 to descend, so that the cigarette box is detached from the conveyor surface and supported by the pressure platform 7. The compaction mechanism 3 moves down to compress the tobacco in the cigarette box and then rises to reset. The weighbridge protection mechanism drives the conveyor and weighing mechanism 2 to rise, so that the cigarette box is detached from the pressure platform 7 and returns to the conveyor. The conveyor starts to transport the cigarette box forward, and the next cigarette box enters the second packing station 41 to wait for packing. The activation of the weighbridge protection mechanism includes: both the weighing mechanism 2 and the conveyor are installed on the lifting base plate 5, and the lifting base plate 5 is raised and lowered under the action of the lifting mechanism 6; the conveyor and the pressure platform 7 are arranged in a nested structure. Under the control of the lifting mechanism, when the lifting base plate 5 descends to the low position, the height of the fixed pressure platform 7 is higher than the height of the conveyor surface. When the lifting base plate 5 rises to the high position, the height of the conveyor surface is higher than the height of the pressure platform 7.

[0022] Each conveyor or conveyor 8 is equipped with a proximity switch or information identification device connected to the control system to detect whether the cigarette box has entered the conveyor or conveyor 8. In step S1, as long as any conveyor or conveyor 8 is unloaded, the previous conveyor or conveyor 8 will continue to run until the first cigarette box reaches the first packing station 42 or the second packing station 41 and is in the packing state, and then the conveying will stop. When the packing state signal of the first packing station 42 or the second packing station 41 is released, and the next conveyor or conveyor 8 is in the unloaded state, it will continue to start and convey the cigarette box to the next conveyor or conveyor 8. The packing status is sent to the control system by the sensor on the fabric cart 1.

[0023] The fabric trolley 1 is equipped with an ultrasonic sensor that faces the middle of the tobacco box at the packing station 4. This sensor is used to detect the height of the tobacco material being loaded into the box. When the height of the tobacco material is higher than a preset value, the control system controls the fabric trolley 1 to stop the current packing and unloading.

[0024] After the smoke box enters the workstation and stops, the weighing mechanism 2 acquires the initial weighing data. After the packing and feeding begins, it continuously monitors the overall weight of the smoke box. When the weight reaches or exceeds the preset value, the control system stops the material distribution vehicle 1 from loading and unloading the current workstation. The weighing mechanism 2 then acquires the current weight data of the smoke box again to obtain the net weight data of the material inside the smoke box.

[0025] After receiving the signal that the fabric carrier 1 has stopped spreading the fabric, the control system controls the weighbridge protection mechanism and the compaction mechanism 3 to start simultaneously. The lifting time of the weighbridge protection mechanism's lifting base plate 5 is shorter than the time it takes for the compaction mechanism's pressure head 31 to descend into the smoke box. After the compaction mechanism 3 reaches its position and the return signal is transmitted to the control system, the control system controls the weighbridge protection mechanism's lifting base plate 5 to perform a reset operation.

[0026] The lifting base plate 5 and the pressure platform 7 are nested together. The lifting base plate 5 is always located below the pressure platform 7. When the lifting base plate 5 is in a high position, the two conveyor chains 81 of the conveyor on the lifting base plate 5 are located on both sides of the pressure platform 7 and are higher than the platform surface of the pressure platform 7. When the lifting base plate 5 is in a low position, the platform surface of the pressure platform 7 is lower than the height of the conveyor chains 81. The lifting base plate 5 is driven by the lifting chain 56 to lift and lower synchronously. During the lifting process, the lifting base plate 5 is guided by the support rod 66 on the lifting base 67 through the four-way arranged clamping guide wheels to achieve smooth lifting and lowering.

[0027] Packing station 4 is a dual-station unloading structure arranged one in front of the other, located at both ends of the material distribution car 1, sharing the same conveyor line. It alternately unloads the passing cigarette boxes in a sequential and intermittent manner. There are two material box stations between the two packing stations 4.

[0028] In this embodiment, in order to make the packing process more detailed and easier to describe accurately, the conveying device or conveyor 8 is numbered and described. The packing station 4 on the right side of the figure is described as packing station 42, and the packing station 4 on the left side is described as packing station 41. For conventional components such as compactor, bidirectional material carrier 1, and conveyor, which are conventional products of the prior art, no excessive structural description is given.

[0029] Cigarette boxes 1, 2, ... N sequentially enter the control area of ​​the automatic quantitative packing system for tobacco via the conveyor line, as shown in the figure. When the information identification device (barcode reader or RFID) on the leftmost conveyor device 1 identifies the empty cigarette box, the following conveyor devices 2, 3, 4, 5, and 6 are activated to transport the empty cigarette boxes to packing station 42. Conveyor device 6 is the conveyor on packing station 42. After its information identification device detects the empty cigarette box is in place, it prepares to unload and pack it. First, the pneumatic unloading device descends to its position while the pneumatic baffle rises to block cigarette box 1 (11). Similarly, cigarette boxes 2 and 3 (13) stop on conveyor devices 5 and 4 respectively, and cigarette box 4 (14) stops on packing station 41 (2). The fifth and sixth tobacco boxes are placed on the second and first conveyor devices, respectively. The material distribution vehicle 1 includes a transverse material distribution vehicle 1 and a longitudinal material distribution vehicle 1. First, it loads the material into the first packing station 42. After passing through the pneumatic material dropping device, the tobacco falls into the tobacco box. The weighing mechanism 2 on the first packing station 42 detects its weight in real time. When the predetermined packing quantity is reached, the control system feeds back the material distribution vehicle 1 to stop loading the material into the first packing station 42. The material distribution vehicle 1 then travels to the second packing station 41 to load the fourth tobacco box 14. At the same time, the pressure head 31 of the compaction mechanism 3 on the first packing station 42 begins to descend, the weighing protection mechanism is activated, and the weighing mechanism 2 and the conveyor are both installed on the lifting base plate 5. The lifting base plate 5 can begin to descend under the action of the lifting mechanism 6. The conveyor and the pressure platform 7 are arranged in a nested structure. Under the control of the lifting mechanism, when the lifting base plate 5 descends to the low position, the height of the fixed pressure platform 7 is higher than the conveying surface height of the conveyor, transferring the No. 1 tobacco box 11 onto the pressure platform 7. Then, the pressure head 31 enters the No. 1 tobacco box 11 to compact the tobacco. After compaction, the pressure head 31 rises to its reset position, and the lifting base plate 5 of the weighbridge protection mechanism rises. When the lifting base plate 5 rises to the high position, the conveying surface height of the conveyor is higher than the height of the pressure platform 7, transferring the No. 1 tobacco box 11 onto the conveyor again. Subsequently, conveying devices 6, 5, and 4 are activated, and tobacco boxes 1, 2, and 3 each move forward two conveying devices. Tobacco box 13 reaches the No. 1 packing station. After step 42 is stopped, cigarette box 11 is successfully loaded and shipped out, cigarette box 2 is empty and will be transferred or re-transferred to a new packing queue after shipping out. When the material carrier 1 finishes packing cigarette box 4 at packing station 2, empty cigarette box 3 is placed at packing station 1. The material carrier 1 moves to packing station 1 again to load cigarette box 3. Cigarette box 4 is compacted and protected by the weighing scale at packing station 2. After completion, cigarette boxes 4, 5, and 6 move forward two conveying packing stations 4 and arrive at conveying devices 5, 4, and 3 respectively. Cigarette box 6 enters packing station 2 to wait for packing, thus realizing alternating packing operation.

[0030] Preferably, the weighing mechanism 2 includes at least four weighing sensors 21 of a floor scale, which are respectively installed below the four corner support columns of the conveyor to support the conveying device and weigh its overall weight. In a preferred embodiment, there are six weighing sensors 21, with three installed at each end and the middle of opposite sides. The compaction mechanism 3 is located directly above the packing station 4, including a lifting component and a pressing head 31 installed below the lifting component and directly opposite the center of the packing station 4. The pressing head 31 can move downward into the material box to compact the tobacco shreds under the downward movement of the lifting component, and can rise to the highest position for standby after compaction.

[0031] The control system can control the fabric carrier 1 to first load tobacco box 11 with material. During the process, it receives real-time signal feedback from the weighing mechanism 2 on the first packing station 42 until the required weight is reached. Then, it stops loading tobacco box 11 and starts loading tobacco box 14. At the same time as tobacco box 14 is unloading, the weighbridge protection mechanism on the first packing station 42 is activated. The lifting base plate 5 drives the conveyor and weighing mechanism 2 on the first packing station 42 to descend to the low position, so that tobacco box 11 is supported on the pressure platform 7. Then, it controls the pressure head 31 of the compaction mechanism 3 to press down on tobacco box 11 to compact the tobacco. After compaction, the box rises and resets. Then, the lifting base plate 5 on packing station 42 rises and resets, causing cigarette box 11 to return to the conveyor. The conveying devices below cigarette boxes 1, 2, and 3 are activated, transporting them forward until cigarette box 3 reaches packing station 42 and stops. Each cigarette box entering packing station 4 moves forward two conveying devices at a time. Packing station 42 can pack odd-numbered cigarette boxes (1, 3, 5…) quantitatively; packing station 41 can pack even-numbered cigarette boxes (4, 6, 8…) quantitatively. The overall packing sequence is 1→4→3→6→5→8→7→10→…

[0032] Example 2: Based on Example 1, the lifting base plate 5 of the weighbridge protection mechanism is frame-shaped. The four corners and the middle of the lifting base plate 5 are provided with mounting seats 22 for installing the weighing sensor 21. The lifting chain 56 is connected to the lifting base plate 5. The lifting chain 56 is connected to the lifting mechanism 6 through the transmission mechanism and rotates synchronously, which can drive the lifting of the entire lifting base plate 5.

[0033] The conveyor at the packing station 4 is a conveyor frame structure with a guide rail type conveyor chain 81. The conveyor chain 81 consists of two sections, which are respectively installed on single-sided guide rails distributed along the long side. The bottom of each single-sided guide rail is connected to three weighing sensors 21 and installed on the mounting base 22. The pressure platform 7 is placed between the two single-sided guide rails along the length of the conveyor, forming a nested structure. When the lifting base plate 5 is in a high position, the two conveyor chains 81 of the conveyor on the lifting base plate 5 are located on both sides of the pressure platform 7 and are higher than the platform surface of the pressure platform 7. When the lifting base plate 5 is in a low position, the platform surface of the pressure platform 7 is lower than the height of the conveyor chain 81.

[0034] Preferably, the lifting mechanism 6 includes a lifting base 67, a lifting motor 68, and a transmission mechanism. The lifting base 67 has a concave cross-section and is arranged on both sides of the conveyor. Lifting sprocket seats 54 are installed on the high surface of the lifting frame 53 on both sides of the lifting base 67. The lifting drive sprocket 55 on each side of the lifting sprocket seat 54 is connected to the lifting chain 56. The lifting drive sprocket 55 is synchronously driven through the coaxial transmission sprocket 57 and the transmission chain 51 between the transmission sprockets 57. One of the transmission sprockets 57 is directly connected to the lifting motor 68. The lifting mechanisms 6 on both sides are linked by the transmission rod 52. Under the rotation of the lifting motor 68, the lifting chain 56 is driven to rotate synchronously and at the same speed, raising or lowering the lifting base plate 5. The lifting frames 53 on both sides are set at the same height. The lifting sprocket seats 54 above them are used to install the lifting drive sprockets 55 and transmission sprockets 57. The transmission sprockets 57 on the lifting sprocket seats 54 on the same side are connected by a transmission chain 51. The transmission sprockets 57 on the lifting sprocket seats 54 near the lifting motor 68 are also directly driven by the chain directly connected to the lifting motor 68. The lifting motor 68 directly drives the transmission rod 52 to rotate. The transmission rod 52 is directly connected to the lifting frame 53 on the other side. It is also connected to the transmission sprocket 57 near it by a chain. Through the combination and cooperation of these chains and sprockets, a transmission mechanism is formed to realize the synchronous lifting operation of the four corners of the lifting base plate 5 at the same height and speed. Preferably, lifting mounting blocks 61 are provided at the four corners of the square on the lifting base plate 5. The lifting mounting blocks 61 are fixedly connected to the lifting chain 56. The lifting mounting blocks 61 include an inner plate 62 and an outer plate 63. The inner plate 62 and the outer plate 63 are connected by two sets of wheel axles 60 arranged vertically. Each set of wheel axles 60 is fitted with a pair of transverse clamping guide wheels 64 arranged laterally. A pair of longitudinal clamping guide wheels 65 are respectively installed on the inner plate 62 and the outer plate 63 between the two sets of transverse clamping guide wheels 64. The lifting frame 53 of the lifting base 67 is provided with vertically distributed support rods 66. At least two support rods 66 are provided on each side of the lifting frame 53. The support rods 66 are positioned between the transverse clamping guide wheels 64 and the longitudinal clamping guide wheels 65 in opposite positions. When the lifting base plate 5 moves up and down, the support rods 66 play a guiding role. The four-way clamping guide wheel is formed by the transverse clamping guide wheel 64 and the longitudinal clamping guide wheel 65, so that the lifting base plate 5 can be raised and lowered by the support rod 66 with a square tube structure as the guide rail during the lifting process. Specifically, both ends of the lifting chain 56 pass through the inner plate 62 of the lifting mounting block 61 and are fixed to form a ring chain. The upper end is matched with the lifting drive sprocket 55, and the lower end is matched with the driven sprocket installed at the bottom of the lifting frame 53. When the lifting drive sprocket 55 is rotated forward and reversed by the lifting motor 68 and the transmission mechanism, it drives the lifting chain 56 to rotate forward or reverse to realize the lifting of the lifting base plate 5.

[0035] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A highly integrated method for automatic quantitative packing of tobacco shreds, comprising a conveyor line consisting of several individually controllable conveyors spliced ​​together, a packing station (4) arranged on the conveyors, a material feeding trolley (1) for packing and unloading, the packing station (4) further comprising a weighing mechanism (2) for weighing the tobacco boxes, and a compaction mechanism (3) for compacting the material inside the tobacco boxes, characterized in that... Includes the following steps: Step S1: After detecting that the cigarette box has entered the conveyor of the conveyor line, start the conveyor to transport the first cigarette box forward in sequence until the first cigarette box reaches the conveyor of the No. 1 packing station (42) and then stop. Step S2: The material carrier (1) loads the first packing station (42) with materials. After the predetermined amount of materials is reached, the loading stops and the second packing station (41) is loaded with materials. Step S3: The weighbridge protection mechanism of the first packing station (42) is activated, so that the cigarette box is separated from the contact of the weighing mechanism (2) and compacted to protect the sensor module of the weighing mechanism (2); The weighbridge protection mechanism of the first packing station (42) is activated, driving the conveyor and the weighing mechanism (2) to descend, so that the cigarette box is separated from the surface of the conveyor and supported by the pressure platform (7). The compaction mechanism (3) moves down to press the tobacco in the cigarette box and then rises to reset. The weighbridge protection mechanism drives the conveyor and the weighing mechanism (2) to rise, so that the cigarette box is separated from the pressure platform (7) and returns to the conveyor. The conveyor is activated to transport the cigarette box forward, and the next cigarette box enters the first packing station (42) to wait for packing. Step S4: The material carrier (1) completes the loading of the second packing station (41), stops after reaching the predetermined material quantity, and starts loading the first packing station (42) again. Step S5: The weighbridge protection mechanism of the second packing station (41) is activated, causing the cigarette box to be compacted after being removed from the contact of the weighing mechanism (2) to protect the sensor module of the weighing mechanism (2); The weighbridge protection mechanism of the second packing station (41) is activated, driving the conveyor and the weighing mechanism (2) to descend, causing the cigarette box to be removed from the surface of the conveyor and supported by the pressure platform (7). The compaction mechanism (3) moves down to compact the tobacco in the cigarette box and then rises to reset. The weighbridge protection mechanism drives the conveyor and the weighing mechanism (2) to rise, causing the cigarette box to be removed from the pressure platform (7) and return to the conveyor. The conveyor is activated to transport the cigarette box forward, and the next cigarette box enters the second packing station (41) to wait for packing. Each conveyor (8) transports or stops one cigarette box at a time. The cigarette boxes entering or leaving the No. 1 and No. 2 packing stations (41) move forward two cigarette box stations each time. The No. 1 packing station (42) loads the odd-numbered cigarette boxes in sequence 1, 3, 5... in sequence. The No. 2 packing station (41) loads the even-numbered cigarette boxes in sequence 4, 6, 8... in sequence.

2. The highly integrated automatic quantitative packing method for tobacco shreds according to claim 1, characterized in that, The weighing scale protection mechanism is activated, including: the weighing mechanism (2) and the conveyor are both installed on the lifting base plate (5), and the lifting base plate (5) is lifted and lowered under the action of the lifting mechanism (6); the conveyor and the pressure platform (7) are arranged in a nested structure. Under the control of the lifting mechanism, when the lifting base plate (5) is lowered to the low position, the height of the fixed pressure platform (7) is higher than the height of the conveyor surface. When the lifting base plate (5) is raised to the high position, the height of the conveyor surface is higher than the height of the pressure platform (7).

3. The highly integrated automatic quantitative packing method for tobacco shreds according to claim 1, characterized in that, Each conveyor (8) is equipped with a proximity switch or information identification device connected to the control system to detect whether the cigarette box has entered the conveyor (8). In step S1, as long as any one conveyor (8) is unloaded, the previous conveyor (8) will continue to run until the first cigarette box reaches the first packing station (42) or the second packing station (41) and is in the packing state, and then the conveyor will stop. When the packing state signal of the first packing station (42) or the second packing station (41) is released, and the next conveyor (8) is in the unloaded state, it will continue to start and convey the cigarette box to the next conveyor (8). The packing state is sent to the control system by the sensor on the fabric cart (1).

4. The highly integrated automatic quantitative packing method for tobacco shreds according to claim 1, characterized in that, The fabric trolley (1) is equipped with an ultrasonic sensor in the middle of the tobacco box at the packing station (4) to detect the height of the tobacco material being packed. When the height of the tobacco material is higher than the preset value, the control system controls the fabric trolley (1) to stop the current packing and unloading.

5. The highly integrated automatic quantitative packing method for tobacco shreds according to claim 1, characterized in that, The weighing mechanism (2) acquires the first weighing data after the cigarette box enters the work station and stops. After the packing and feeding begins, it continuously monitors the overall weight of the cigarette box. When the weight reaches or exceeds the preset value, the control system stops the material distribution vehicle (1) from unloading the current work station. The weighing mechanism (2) acquires the current weight data of the cigarette box again and obtains the net weight data of the material in the cigarette box.

6. The highly integrated automatic quantitative packing method for tobacco shreds according to claim 1, characterized in that, After receiving the signal that the fabric carrier (1) has stopped fabricating, the control system controls the weighbridge protection mechanism and the compaction mechanism (3) to start simultaneously. The lifting time of the weighbridge protection mechanism's lifting base plate (5) is shorter than the time it takes for the compaction mechanism's pressure head (31) to descend into the smoke box. After the compaction mechanism (3) reaches its position, the return signal is transmitted to the control system, and then the control system controls the weighbridge protection mechanism's lifting base plate (5) to perform a reset operation.

7. The highly integrated automatic quantitative packing method for tobacco shreds according to claim 6, characterized in that, The lifting base plate (5) and the pressure-bearing platform (7) are nested together. The lifting base plate (5) is always located below the pressure-bearing platform (7). When the lifting base plate (5) is in a high position, the two conveyor chains (81) of the conveyor on the lifting base plate (5) are located on both sides of the pressure-bearing platform (7) and are higher than the platform surface of the pressure-bearing platform (7). When the lifting base plate (5) is in a low position, the platform surface of the pressure-bearing platform (7) is lower than the height of the conveyor chains (81).

8. The highly integrated automatic quantitative packing method for tobacco shreds according to claim 2, characterized in that, The lifting base plate (5) is driven by the lifting chain (56) to lift synchronously. During the lifting process, the lifting base plate (5) is guided by the support rod (66) on the lifting base (67) through the four-way arranged clamping guide wheels to achieve smooth lifting.

9. The highly integrated automatic quantitative packing method for tobacco shreds according to claim 1, characterized in that, The packing station (4) is a double-station unloading structure arranged one in front and one behind. They are set at both ends of the material distribution car (1) and share the same conveyor line. They alternately unload the passing cigarette boxes in a sequential manner. There are two material boxes between the two packing stations (4).

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