Free mixed package secondary packaging production line and production method thereof

Abstract

The invention relates to a free bag mixing secondary packaging production line and a production method thereof.The secondary packaging production line comprises a left conveying line, a right conveying line, a plurality of bag arranging machines, a plurality of separated discharging mechanisms, a lifting conveying mechanism and a sub-packaging conveying mechanism, and the lifting conveying mechanism and the sub-packaging conveying mechanism are arranged at the tail end of the left conveying line and the tail end of the right conveying line respectively. The bag arranging machines are arranged on the outer sides of the left conveying line and the right conveying line respectively. The output ends of the multiple bag arranging machines are connected with the separated discharging mechanism. A plurality of feeding grooves are formed in conveying belts of the left conveying line and the right conveying line, and the split-channel discharging mechanism is correspondingly connected with the left conveying line and the right conveying line through a left output port and a right output port and communicates with the feeding grooves in the corresponding conveying lines. The subpackaging conveying mechanism comprises a subpackaging conveying belt, a pushing device and charging hoppers on the left side and the right side, the lifting conveying mechanism is connected with the subpackaging conveying belt, and the pushing device is movably arranged between the left side and the right side of the subpackaging conveying belt so as to push material packages to the charging hoppers on the left side or the right side. Intelligent free mixed package secondary packaging is achieved, the packaging accuracy and efficiency are improved, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of packaging machinery technology, specifically to a free-mixing secondary packaging production line and its production method. Background Technology

[0002] In the current market, large modular building block packaging generally adopts a three-level modular packaging design, namely an outer packaging box, an inner packaging bag, and a small parts bag. Usually, the small parts bag is packaged using an intelligent parts packaging production line. Then, multiple different small parts bags are manually taken, put into the inner packaging bag, and sealed. Finally, the inner packaging bag is put into the outer packaging box.

[0003] However, during the process of packing multiple small parts bags into the inner packaging bag, since it is done manually without any inspection tools, there is a high possibility of problems such as multiple packs, fewer packs, or incorrect packs. Moreover, manual packaging is inefficient and time-consuming. Summary of the Invention

[0004] To address the existing problems, this invention proposes a free-mixing secondary packaging production line and its production method, which realizes intelligent free-mixing secondary packaging, improves packaging accuracy, greatly increases packaging efficiency, and reduces labor and time costs.

[0005] The technical solution of this invention is implemented as follows:

[0006] A free-mixing secondary packaging production line includes a left conveyor line, a right conveyor line, multiple bag sorting machines, multiple sorting and unloading mechanisms, and lifting conveyors and sorting conveyors, each located at the end of the left and right conveyor lines. The left and right conveyor lines are arranged in parallel. The multiple bag sorting machines are respectively located on the outer side of the left and right conveyor lines, and the output ends of the multiple bag sorting machines are connected to the multiple sorting and unloading mechanisms one by one. Multiple feeding troughs are evenly provided on the conveyor belts of the left and right conveyor lines. The sorting and unloading mechanisms are respectively connected to the left and right conveyor lines through the left and right output ports, and are connected to the feeding troughs on the corresponding conveyor lines.

[0007] The subcontracting conveyor includes a subcontracting conveyor belt, a pushing device, and hoppers located on the left and right sides of the subcontracting conveyor belt. The top of the lifting conveyor is connected to the subcontracting conveyor belt. The pushing device is movably located between the left and right sides of the subcontracting conveyor belt so that it can push small parts bags to the left or right hopper.

[0008] Preferably, each of the multiple packaging machines is equipped with a dynamic scale at its output end. One end of the dynamic scale is connected to the storage bin of the packaging machine, and the other end is connected to the feeding mechanism.

[0009] Preferably, sensors are installed below the multiple dynamic scales and at the left and right output ports of the multiple separate feeding mechanisms.

[0010] Preferably, the bag sorting machine on the outer side of the left conveyor line and the bag sorting machine on the outer side of the right conveyor line are arranged at intervals.

[0011] Preferably, extension plates are provided on both the front and rear sides of the feed trough.

[0012] Preferably, the conveyor belt of the lifting conveyor mechanism is evenly provided with multiple feeding troughs, and the length of the feeding troughs is greater than the width of the feeding trough of the left or right conveyor line.

[0013] Preferably, the pushing device includes a transmission structure, a transmission belt, a guide rail, a slider, and a pushing plate. The transmission structure and the guide rail span across the top of the left and right sides of the sub-packaging conveyor belt. The transmission belt is wound around the transmission wheels on the left and right sides of the transmission structure. The guide rail is located on the front and rear sides of the transmission structure. The middle section of the slider is fixedly connected to the transmission belt, and its two ends are slidably arranged on the front and rear guide rails. The pushing plate is fixed below the slider.

[0014] Preferably, the hopper opening is connected to a guide tube column that facilitates the insertion of packaging bags.

[0015] Preferably, the subcontracting conveyor also includes side baffles distributed on the left and right sides of the subcontracting conveyor belt. The side baffles include a side baffle plate and a side baffle driver connected by a drive. The side baffle driver can drive the side baffle plate to move up and down to block the left and right sides of the subcontracting conveyor belt or to connect the subcontracting conveyor belt with the loading hopper.

[0016] Preferably, the subcontracting conveyor also includes a front baffle device, which is located in front of the left and right side baffle devices; the front baffle device includes a front baffle plate and a front baffle driver connected by a drive, and the front baffle driver can drive the front baffle plate to move up and down to release or block the front side of the subcontracting conveyor belt.

[0017] The present invention also provides a production method for the above-mentioned free-mixing secondary packaging production line, the production method comprising the following steps:

[0018] S1: During the initial layout, adjust the feed chute on the left conveyor line and the feed chute on the right conveyor line to be roughly aligned, and adjust the multiple packaging machines and their connected multiple shunting and feeding mechanisms to be aligned with the multiple feed chutes one by one.

[0019] S2: Adjust the transmission speed of the left and right conveyor lines so that each forward movement corresponds to the length of one feed trough; start the left and right conveyor lines.

[0020] S3: The main controller retrieves two sets of pre-secondary packaging small parts bag combination information from the database, and defines the first set of combinations to be conveyed by the left conveyor line and the second set of combinations to be conveyed by the right conveyor line. The main controller distributes the various small parts bag information of the two sets of combinations to multiple packaging machines on the corresponding conveyor lines, and distributes their feeding direction information to multiple corresponding sectional feeding mechanisms.

[0021] S4: Based on the information of small parts bags displayed by multiple sorting machines, pour the corresponding small parts bags into the corresponding sorting machines; each sorting machine sorts the small parts bags and arranges them in an orderly manner before outputting them to the sorting and unloading mechanism.

[0022] S5: Multiple feeding mechanisms convey materials to the left or right according to the confirmed feeding direction information, so that multiple small parts bags enter multiple feed troughs on the left or right conveyor line respectively.

[0023] S6: Each feed chute on the left and right conveyor lines passes through the corresponding feed mechanism at a uniform speed via the conveyor line, collecting small parts bags below each feed mechanism.

[0024] S7: At the end of the left and right conveyor lines, the small parts bags from each feed trough are poured into each feed trough on the corresponding lifting conveyor mechanism, which then transports them to the corresponding sub-packaging conveyor belt.

[0025] S8: The sub-packaging conveyor belt transports the small parts bags to the loading hopper. When the bags reach the loading hopper, the pushing device pushes the continuously fed small parts bag combinations to the left or right loading hopper in the order of left to right. Then, the small parts bag combinations fall into the middle packaging bag at the opening of the loading hopper and are bagged, completing the secondary packaging.

[0026] Prior to this, in S3, the small parts bag information includes the weight of a single small parts bag; in S4, before the bag sorting machine conveys the small parts bag to the sorting and unloading mechanism, the bag sorting machine first conveys the small parts bag to the dynamic scale for weighing; when the weighed weight matches the weight of the corresponding single small parts bag, the dynamic scale conveys the small parts bag to the sorting and unloading mechanism.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] In this invention, the sorting machines are respectively located outside the left and right conveyor lines, and their output ends are connected to the sorting and feeding mechanisms. Each sorting machine outputs a type of small parts bag, which is then distributed to one of the feeding troughs on either the left or right conveyor line via the sorting and feeding mechanisms. Each feeding trough on both conveyor lines collects all the small parts bags distributed by the sorting machines through a transmission mechanism, and finally, all of them are fed to the lifting conveyor at the end and lifted to the packaging conveyor belt. The pushing device pushes these small parts bags to the left or right loading hopper, thus completing the filling of the intermediate packaging bags. This process is repeated to achieve intelligent collection and intelligent secondary packaging, improving packaging accuracy. Moreover, since the sorting and feeding mechanisms can be connected to the left and right conveyor lines respectively, the number of sorting and feeding mechanisms can be flexibly adjusted according to different packaging combinations of intermediate packaging bags. This allows for secondary packaging of two different combinations of small parts bags simultaneously, greatly improving packaging efficiency and reducing labor and time costs. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an overall schematic diagram of the free-mixing and secondary packaging production line of the present invention;

[0031] Figure 2 This is a schematic diagram showing the cooperation between the packaging machine, dynamic weighing, tiered feeding mechanism, left conveyor line, and right conveyor line in this invention;

[0032] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 This is a schematic diagram of the lifting conveying mechanism and the subcontracting conveying mechanism in this invention;

[0034] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0035] Figure 6 This is a detailed schematic diagram of the feeding device in this invention.

[0036] Attached image labels:

[0037] 1. Left conveyor line; 11. Feed chute; 12. Extension plate; 2. Right conveyor line; 3. Packaging machine; 4. Separate unloading mechanism; 41. Left output port; 42. Right output port; 5. Lifting conveyor mechanism; 51. Feed chute; 6. Sub-packaging conveyor mechanism; 61. Sub-packaging conveyor belt; 62. Pushing device; 621. Transmission structure; 622. Transmission belt; 623. Guide rail; 624. Slider; 625. Pushing plate; 63. Loading hopper; 631. Guide column; 64. Side baffle device; 641. Side baffle plate; 642. Side baffle driver; 65. Empty box conveyor belt; 66. Finished box conveyor belt; 67. Front baffle device; 671. Front baffle plate; 672. Front baffle driver; 7. Sensor; 8. Dynamic scale. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] like Figures 1 to 6 The diagram shows a free-mixing secondary packaging production line provided by the present invention, comprising a left conveyor line 1, a right conveyor line 2, multiple bag sorting machines 3, multiple sizing and unloading mechanisms 4, two lifting conveyors 5, and two sub-bag conveyors 6, as shown. Figure 1As shown, the left conveyor line 1 and the right conveyor line 2 are arranged in parallel. At the end of the left conveyor line 1 and the right conveyor line 2, a lifting conveyor mechanism 5 and a sub-packaging conveyor mechanism 6 are connected. Multiple packaging machines 3 are respectively arranged outside the left conveyor line 1 and the right conveyor line 2. Some packaging machines 3 are located outside the left conveyor line 1 and some packaging machines 3 are located outside the right conveyor line 2. The feeding bins of the multiple packaging machines 3 are all located on the side of the packaging machines 3 away from the left and right circulation lines.

[0042] The output ends of multiple bag sorting machines 3 are connected one-to-one with multiple branch feeding mechanisms 4, that is, the output end of each bag sorting machine 3 is connected to a branch feeding mechanism 4. Specifically, for example... Figure 2 As shown, each bag sorting machine 3 is equipped with a dynamic scale 8 at its output end. One end of the dynamic scale 8 is connected to the storage bin of the bag sorting machine 3, and the other end is connected to the feeding mechanism 4. The dynamic scale 8 can weigh the small parts bags output by the bag sorting machine 3.

[0043] like Figure 1 and Figure 2 As shown, multiple feed troughs 11 are evenly arranged on the conveyor belts of the left conveyor line 1 and the right conveyor line 2. The feed troughs 11 are formed by the front and rear partitions and the left and right side plates of the conveyor lines. The channel feeding mechanism 4 is connected to the left conveyor line 1 and the right conveyor line 2 respectively through the left output port 41 and the right output port 42, and is connected to the feed troughs 11 on the corresponding conveyor lines. Specifically, as shown... Figure 3 As shown, the left and right ends of the feeder mechanism 4 are the left output port 41 and the right output port 42, respectively. Figure 1 and Figure 2 As shown, the feeding mechanism 4 is connected to the left conveyor line 1 through the left output port 41, and to the right conveyor line 2 through the right output port 42. During the initial layout and debugging, the feeding troughs 11 on the left conveyor line 1 and the feeding troughs 11 on the right conveyor line 2 are roughly aligned and adjusted. The feeding mechanism 4 connected to multiple packaging machines 3 is aligned with the multiple feeding troughs 11 on the left conveyor line 1 and the right conveyor line 2 one by one. The transmission speed of the left conveyor line 1 and the right conveyor line 2 is adjusted so that each forward movement is the length of one feeding trough 11, and the transmission speed is kept constant to ensure that each forward movement of the conveyor belts of the left conveyor line 1 and the right conveyor line 2 ensures that the left output port 41 and the right output port 42 of the feeding mechanism 4 can be aligned and connected with the feeding troughs 11 on the corresponding conveyor lines.

[0044] like Figure 3 As shown, sensors 7 are installed below the dynamic scale 8 at the output end of multiple bag sorting machines 3 and at the left output port 41 and right output port 42 of multiple branch feeding mechanisms 4. The sensors 7 can sense the passing small parts bags and send the sensing signal to the main controller.

[0045] like Figure 4As shown, the conveyor belt of the lifting and conveying mechanism 5 is evenly provided with multiple feeding troughs 51. The multiple feeding troughs 51 enable the lifting and conveying mechanism 5 to lift multiple sets of small parts bags at the same time, thereby speeding up the conveying efficiency.

[0046] like Figure 4 As shown, the subcontracting conveyor 6 includes a subcontracting conveyor belt 61, a pushing device 62, and loading hoppers 63 arranged on the left and right sides of the subcontracting conveyor belt 61. The top of the lifting conveyor 5 is connected to the subcontracting conveyor belt 61. The pushing device 62 is movably arranged between the left and right sides of the subcontracting conveyor belt 61 to push small parts bags to the left or right loading hopper 63. Each loading hopper 63 can accommodate an intermediate packaging bag at its opening. Figure 4 As shown, in this embodiment, there are three pushing positions on both the left and right sides of the sub-packaging conveyor belt 61, that is, there are three pushing devices 62 on the sub-packaging conveyor belt 61, and there are three loading hoppers 63 on both sides of the corresponding positions of the three pushing devices 62. The six pushing positions provide time for sealing and boxing for each pushing position, and on this basis, it will not delay the bagging of the next group of small parts bags, which can speed up the packaging efficiency.

[0047] like Figure 4 and Figure 5 As shown, the subcontracting conveyor 6 also includes side baffle devices 64 distributed on the left and right sides of the subcontracting conveyor belt 61. In this embodiment, each of the six pushing positions is provided with a side baffle device 64. The side baffle device 64 includes a side baffle plate 641 and a side baffle driver 642 connected by a drive. The side baffle driver 642 can drive the side baffle plate 641 to move up and down to block the left and right sides of the subcontracting conveyor belt 61 or to connect the subcontracting conveyor belt 61 with the loading hopper 63.

[0048] like Figure 4 and Figure 5 As shown, the subcontracting conveyor 6 also includes a front baffle device 67. In this embodiment, the number of front baffle devices 67 is 3. The front baffle devices 67 are located in front of the left and right side baffle devices 64. The front baffle device 67 includes a front baffle plate 671 and a front baffle driver 672 that are driven to connect. The front baffle driver 672 can drive the front baffle plate 671 to move up and down to release or block the front side of the subcontracting conveyor belt 61.

[0049] The present invention also provides a production method for the above-mentioned free-mixing secondary packaging production line, the production method comprising the following steps:

[0050] S1: During the initial layout, adjust the feed chute 11 on the left conveyor line 1 and the feed chute 11 on the right conveyor line 2 to be roughly aligned, and adjust the multiple packaging machines 3 and their connected multiple slitting and unloading mechanisms 4 to be aligned with the multiple feed chute 11 one by one.

[0051] S2: Adjust the transmission speed of the left conveyor line 1 and the right conveyor line 2 so that each forward movement corresponds to the length of one feed trough 11; start the left conveyor line 1 and the right conveyor line 2;

[0052] S3: The main controller retrieves two sets of pre-secondary packaging small parts bag combination information from the database and defines the first set of combinations to be conveyed by the left conveyor line 1 and the second set of combinations to be conveyed by the right conveyor line 2. The main controller assigns the various small parts bag information of the two sets of combinations to multiple sorting machines 3 on the corresponding conveyor lines. The small parts bag information includes the small parts bag number and the weight of a single small parts bag, and assigns its feeding direction information to multiple corresponding branch feeding mechanisms 4. That is, it confirms the sorting machine 3 and branch feeding mechanism 4 corresponding to the left conveyor line 1 and confirms the sorting machine 3 and branch feeding mechanism 4 corresponding to the right conveyor line 2. Each sorting machine 3 and its connected branch feeding mechanism 4 are used to convey one type of small parts bag.

[0053] S4: Based on the small parts bag information displayed by multiple bag sorting machines 3, the corresponding small parts bags are poured into the corresponding feeding bins of the bag sorting machine 3; each bag sorting machine 3 sorts the small parts bags and arranges them in an orderly manner to be conveyed to the dynamic scale 8 for weighing. If the weight exceeds the weight of the corresponding single small parts bag, the dynamic scale 8 will convey it back to the storage bin of the bag sorting machine 3 and then continue to wait for the bag sorting machine 3 to output the next small parts bag; when the weighing weight matches the weight of the corresponding single small parts bag, the dynamic scale 8 conveys the small parts bag to the sorting and unloading mechanism 4;

[0054] S5: When the small parts bag passes the sensor 7 below the dynamic scale 8, the sensor 7 transmits a signal to the main controller. After receiving the signal, the main controller controls the corresponding feeder mechanism 4 to feed to the left or right according to the confirmed feeding direction information, so that the small parts bags on multiple feeder mechanisms 4 enter multiple feed troughs 11 on the left conveyor line 1 or the right conveyor line 2 respectively. When the sensor 7 at the left output port 41 or right output port 42 of the feeder mechanism 4 detects the small parts bag passing by, it sends a signal to the main controller. After receiving the signal, the main controller controls the corresponding conveyor line to move forward.

[0055] S6: Repeat this operation, and each feed trough 11 on the left conveyor line 1 and the right conveyor line 2 passes through the corresponding feed mechanism 4 at a uniform speed through the transmission of the conveyor line to collect the small parts bag.

[0056] S7: At the end of the left conveyor line 1 and the right conveyor line 2, the small parts bags of each feed trough 11 are poured into each feed trough 51 on the corresponding lifting conveyor mechanism 5, and the lifting conveyor mechanism 5 conveys them to the front end of the corresponding sub-packaging conveyor belt 61.

[0057] S8: The sub-packaging conveyor belt 61 conveys the small parts bag assembly. Before the small parts bag assembly reaches the push position (i.e., the loading hopper 63) of the sub-packaging conveyor belt 61, the side baffle driver 642 always drives the side baffle plate 641 to remain in an upward position to block the left and right sides of the sub-packaging conveyor belt 61, preventing the small parts bags from falling out from the left and right sides of the sub-packaging conveyor belt 61. When the small parts bag assembly is conveyed to the first push position of the sub-packaging conveyor belt 61, the front baffle device 67 drives the front baffle plate 671 to move downward to block the front side of the sub-packaging conveyor belt 61, preventing the small parts bags from exceeding this push position. Subsequently, the corresponding positions on both sides... The side baffle driver 642 drives the side baffle plate 641 to move downward so that the sub-packaging conveyor belt 61 is connected to the loading hopper 63. Then, the pushing device 62 moves to the left side of the sub-packaging conveyor belt 61 and pushes the small parts bag to the left loading hopper 63. The small parts bag is then placed into the middle packaging bag at the opening of the loading hopper 63 and sealed to complete the secondary packaging. After the small parts bag is pushed to the left loading hopper 63, the side baffle driver 642 drives the side baffle plate 641 to move upward and reset. The front baffle device 67 on the front side of the corresponding pushing position drives the front baffle plate 671 to move upward to release the front side of the sub-packaging conveyor belt 61.

[0058] Each packaging assembly is bagged and sealed in the same manner. During this process, the pushing device 62 pushes the continuously arriving small parts bag assemblies from different pushing positions on the sub-packaging conveyor belt 61 into the medium packaging bag in the order of left to right and front to middle to back. The side blocking device 64 and the front blocking device 67 at the corresponding pushing positions operate in the same manner, thereby realizing intelligent bag sorting, intelligent collection, and intelligent secondary packaging, avoiding phenomena such as multiple packages, fewer packages, and incorrect packages, and improving the accuracy of packaging. Secondly, the dual conveyor lines and multiple feeding troughs 11 The setup of multiple feeding troughs 51 and multiple pushing positions can greatly improve the efficiency of secondary packaging and significantly reduce labor and time costs. In addition, since the sub-channel feeding mechanism 4 can be connected to the left conveyor line 1 and the right conveyor line 2 through the left output port 41 and the right output port 42 respectively, the number of the bag sorting machine 3 and the sub-channel feeding mechanism 4 corresponding to the left conveyor line 1 and the right conveyor line 2 can be flexibly adjusted according to the packaging combination of different medium packaging bags, thereby increasing the flexibility and practicality of the secondary packaging production line.

[0059] Furthermore, the bag sorting machine 3 on the outer side of the left conveyor line 1 and the bag sorting machine 3 on the outer side of the right conveyor line 2 are arranged at intervals, such as... Figure 1 As shown, the interval setting saves space, the length of the conveyor line is also relatively short, saving manufacturing costs and conveying time, and increasing conveying speed.

[0060] Furthermore, such as Figure 2 As shown, the feed trough 11 is extended with extension plates 12 above the front and rear partitions respectively. The extension plates 12 can prevent small parts bags from accidentally entering the adjacent feed trough 11, thus improving the packaging accuracy.

[0061] Furthermore, such as Figure 1 and Figure 4 As shown, the length of the feeding trough 51 is greater than the width of the feeding trough 11 of the left conveyor line 1 or the right conveyor line 2. This setting can prevent mis-packaging when small parts bags are transferred from the left conveyor line 1 or the right conveyor line 2 to the lifting conveyor mechanism 5, thereby improving the accuracy of packaging.

[0062] Furthermore, such as Figure 4 As shown, the lifting conveyor 5 is provided with a limiting frame at the connection with the left conveyor line 1 or the right conveyor line 2. The limiting frame prevents the small parts bag of the feed trough 11 from falling out of the outside of the lifting conveyor 5.

[0063] Furthermore, such as Figure 4 and Figure 6 As shown, the feeding device 62 includes a transmission structure 621, a transmission belt 622, a guide rail 623, a slider 624, and a feeding plate 625. The transmission structure 621 and the guide rail 623 span across the top of the left and right sides of the sub-packaging conveyor belt 61. The transmission belt 622 is wound around the transmission pulleys on the left and right sides of the transmission structure 621. The guide rail 623 is located on the front and rear sides of the transmission structure 621. The middle section of the slider 624 is fixedly connected to the transmission belt 622, and its two ends are slidably mounted on the front and rear guide rails 623. The pusher plate 625 is fixed below the slider 624. During operation, when the small parts bag reaches a certain push position on the sub-packaging conveyor belt 61, and the side baffles 641 on both sides of the corresponding position move downward, the main controller starts the transmission structure 621 to rotate, thereby driving the transmission belt 622 to rotate. At this time, the slider 624 moves to one side along the front and rear guide rails 623 as the transmission belt 622 rotates, thereby driving the pusher plate 625 to move all the small parts bags of this packaging combination to the side loading hopper 63 for bagging.

[0064] Furthermore, such as Figure 4 and Figure 5 As shown, a guide tube 631 is connected to the spout of the hopper 63. The guide tube 631 facilitates manual placement of the intermediate packaging bag. The guide tube 631 is replaceable and can be changed according to the size of the bag opening to avoid the guide tube 631 being too large or too small and affecting the bag placement. In this embodiment, the hopper 63 is horizontal and has a semi-enclosed structure. Its lower half is made of sheet metal and its upper half is open, which facilitates manual assistance in placing all the small parts bags into the intermediate packaging bag. In other embodiments, the hopper 63 can be vertically set, resembling a funnel.

[0065] Furthermore, such as Figure 4As shown, the subcontracting conveyor 6 also includes an empty box conveyor belt 65 and a finished box conveyor belt 66, which are located above and below the subcontracting conveyor belt 61, respectively. The empty box conveyor belt 65 and the finished box conveyor belt 66 are designed to prevent empty boxes and finished boxes from piling up at the workstation and affecting the packaging speed. The finished box conveyor belt 66 can transport the finished boxes to the end of the subcontracting conveyor belt 61, making it convenient for manual handling and removal of the finished boxes.

[0066] In summary, the intelligent sorting of multiple packaging machines 3 in this invention ensures that small parts bags are arranged and output in an orderly manner. Each feed chute 11 on the left conveyor line 1 and the right conveyor line 2 independently collects all the small parts bags of the corresponding packaging combination through transmission. All the small parts bags of each packaging combination are lifted and conveyed to the sub-packaging conveyor belt 61 through each feed chute 51. They fall into the middle packaging bag from different pushing positions on the sub-packaging conveyor belt 61 in the order of left to right and front to middle to back, and are then bagged. This achieves intelligent sorting, intelligent collection, and intelligent secondary packaging, avoiding multiple packaging. This reduces issues such as missing or incorrect packages, improving packaging accuracy. Furthermore, the dual conveyor lines, multiple feed troughs 11, multiple feeding troughs 51, and multiple pushing positions significantly improve secondary packaging efficiency and reduce labor and time costs. In addition, since the separate feeding mechanism 4 can be connected to the left conveyor line 1 and the right conveyor line 2 respectively, the number of separate feeding mechanisms 4 feeding to the left conveyor line 1 and the right conveyor line 2 can be flexibly adjusted according to different packaging combinations of medium-sized bags, increasing the flexibility and practicality of the secondary packaging production line.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A free-mixing and secondary packaging production line, characterized in that, It includes a left conveyor line (1), a right conveyor line (2), multiple packing machines (3), multiple sorting and unloading mechanisms (4), and lifting conveyor mechanisms (5) and sorting conveyor mechanisms (6) all located at the ends of the left conveyor line (1) and the right conveyor line (2). The left conveyor line (1) and the right conveyor line (2) are arranged in parallel. The multiple packing machines (3) are respectively located on the outside of the left conveyor line (1) and the right conveyor line (2). The output ends of the multiple packing machines (3) are respectively connected to the multiple sorting and unloading mechanisms (4). Multiple feed troughs (11) are evenly provided on the conveyor belts of the left conveyor line (1) and the right conveyor line (2). The sorting and unloading mechanisms (4) are respectively connected to the left conveyor line (1) and the right conveyor line (2) through the left output port (41) and the right output port (42), and are connected to the feed troughs (11) on the corresponding conveyor lines. The subcontracting conveyor (6) includes a subcontracting conveyor belt (61), a pushing device (62), and loading hoppers (63) arranged on the left and right sides of the subcontracting conveyor belt (61). The top of the lifting conveyor (5) is connected to the subcontracting conveyor belt (61). The pushing device (62) is movably arranged between the left and right sides of the subcontracting conveyor belt (61) so as to push the small parts bag to the left loading hopper (63) or the right loading hopper (63).

2. The free-mixing secondary packaging production line according to claim 1, characterized in that, Each of the multiple packaging machines (3) is equipped with a dynamic scale (8) at its output end. One end of the dynamic scale (8) is connected to the storage bin of the packaging machine (3), and the other end is connected to the feed distribution mechanism (4).

3. The free-mixing secondary packaging production line according to claim 2, characterized in that, Sensors (7) are provided below the multiple dynamic scales (8) and at the left output port (41) and right output port (42) of the multiple feed dispensing mechanisms (4).

4. The free-mixing secondary packaging production line according to claim 1, characterized in that, The bag sorting machine (3) outside the left conveyor line (1) and the bag sorting machine (3) outside the right conveyor line (2) are arranged at intervals.

5. The free-mixing secondary packaging production line according to claim 1, characterized in that, The conveyor belt of the lifting conveyor mechanism (5) is uniformly provided with multiple feeding troughs (51), and the length of the feeding trough (51) is greater than the width of the feeding trough (11) of the left conveyor line (1) or the right conveyor line (2).

6. The free-mixing secondary packaging production line according to claim 1, characterized in that, The pushing device (62) includes a transmission structure (621), a transmission belt (622), a guide rail (623), a slider (624), and a pushing plate (625). The transmission structure (621) and the guide rail (623) span the top of the left and right sides of the sub-packaging conveyor belt (61). The transmission belt (622) is wound around the transmission wheels on the left and right sides of the transmission structure (621). The guide rail (623) is located on the front and rear sides of the transmission structure (621). The middle section of the slider (624) is fixedly connected to the transmission belt (622), and both ends are slidably disposed on the front and rear sides of the guide rail (623). The pushing plate (625) is fixed below the slider (624).

7. The free-mixing secondary packaging production line according to claim 1, characterized in that, The subcontracting conveyor (6) also includes side baffle devices (64) distributed on the left and right sides of the subcontracting conveyor belt (61). The side baffle device (64) includes a side baffle plate (641) and a side baffle driver (642) connected by a drive. The side baffle driver (642) can drive the side baffle plate (641) to move up and down to block the left and right sides of the subcontracting conveyor belt (61) or to connect the subcontracting conveyor belt (61) with the loading hopper (63).

8. The free-mixing secondary packaging production line according to claim 7, characterized in that, The subcontracting conveyor (6) further includes a front baffle device (67), which is located in front of the side baffle devices (64) on the left and right sides. The front baffle device (67) includes a front baffle plate (671) and a front baffle driver (672) connected by a drive. The front baffle driver (672) can drive the front baffle plate (671) to move up and down to release or block the front side of the subcontracting conveyor belt (61).

9. A production method applied to the free-mixing secondary packaging production line as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1: During the initial layout, adjust the feed trough (11) on the left conveyor line (1) and the feed trough (11) on the right conveyor line (2) to be roughly aligned, and adjust the multiple packaging machines (3) and the multiple branch feeding mechanisms (4) connected to them to align with the multiple feed troughs (11) one by one; S2: Adjust the transmission speed of the left conveyor line (1) and the right conveyor line (2) so that each forward movement is the length of one feed trough (11); start the left conveyor line (1) and the right conveyor line (2). S3: The main controller obtains two sets of pre-secondary packaging small parts bag combination information from the database, and defines the first set of combinations to be conveyed by the left conveyor line (1) and the second set of combinations to be conveyed by the right conveyor line (2). The main controller distributes the various small parts bag information of the two sets of combinations to multiple packaging machines (3) on the corresponding conveyor lines, and distributes its feeding direction information to multiple corresponding feeding mechanisms (4). S4: According to the small parts bag information displayed by the multiple sorting machines (3), pour the corresponding small parts bag into the corresponding sorting machine (3); the sorting machines (3) sort the small parts bags and arrange them in an orderly manner to be output to the sorting and unloading mechanism (4); S5: Multiple feeding mechanisms (4) convey to the left or right according to the confirmed feeding direction information, so that multiple small parts bags enter multiple feeding troughs (11) on the left conveying line (1) or the right conveying line (2). S6: Each feed trough (11) on the left conveyor line (1) and the right conveyor line (2) passes through the feed mechanism (4) of each corresponding conveyor line at a uniform speed to collect small parts bags. S7: The left conveyor line (1) and the right conveyor line (2) at the end pour the small parts bag combination of each feed trough (11) into each feed trough (51) on the corresponding lifting conveyor 5, which then conveys it to the corresponding sub-packaging conveyor belt (61). S8: The sub-packaging conveyor belt (61) transports the small parts bag assembly to the left or right loading hopper (63) in the order of first left and then right. The small parts bag assembly then falls into the middle packaging bag at the opening of the loading hopper (63) and is bagged, thus completing the secondary packaging.

10. The production method according to claim 9, characterized in that, In S3, the information of the small parts bag includes the weight of a single small parts bag; in S4, before the bag sorting machine (3) conveys the small parts bag to the sorting and unloading mechanism (4), the bag sorting machine (3) first conveys the small parts bag to the dynamic scale (8) for weighing; when the weighing weight matches the weight of the corresponding single small parts bag, the dynamic scale (8) conveys the small parts bag to the sorting and unloading mechanism (4).

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