A powder packaging system and method

Abstract

The present application relates to the field of powder packaging system, in order to solve the problem that the existing automatic packaging system needs to use additional packaging bag arrangement device and the arrangement process will limit the maximum filling capacity, provide a kind of powder packaging system and packaging method, including: filling machine, clamping fixed mechanism, transport device and transfer device;Clamping fixed mechanism includes: the clamping plate has the freedom of activity of transverse and longitudinal direction;Transfer device includes: placement plate, integrated plate, rotating arm and fixed plate;The lower end of the integrated plate is connected with the placement plate;The rotating arm is rotatably connected with the end of integrated plate away from the placement plate;The fixed plate has at least two, one end of the two fixed plates is slidably connected with the rotating arm.In the present application, the clamping plate is provided with the freedom of activity of longitudinal direction, and after synchronous downward movement with the placement plate, the bag opening can be flattened longitudinally during the upward resetting process of the clamping plate, so that the bag opening can be in a flattened state when the fixed plate is in the state of clamping and fixing the bag opening.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder packaging, in particular, to a powder packaging system and a packaging method. BACKGROUND

[0002] Sodium sulfate is an extremely fine powder, and the powder is easy to escape from the packaging bag during filling. Therefore, in the prior art, the bag opening of the packaging bag is clamped on the discharge port of the filling machine during filling to maintain the airtight state of the bag opening and prevent the powder from escaping from the packaging bag. When the packaging bag is clamped on the discharge port of the filling machine, the packaging bag usually has two states, one is that the packaging bag is directly placed on the conveying device, and the other is that the packaging bag is suspended. If the packaging bag is directly placed on the conveying device, the packaging bag can be directly conveyed to the sealing area by the conveying device after filling is completed, but when the packaging bag moves horizontally to leave the discharge port of the filling machine, the bag opening of the packaging bag will change in shape, and the subsequent sealing operation needs to be reorganized. At this time, corresponding workers usually need to be configured, and it is difficult to achieve complete production automation. When the packaging bag is suspended, if there is a supporting force below the packaging bag after filling is completed, the packaging bag can be separated from the discharge port of the filling machine by moving downward as a whole, thereby reducing or avoiding the lateral deformation of the bag opening of the packaging bag, but the longitudinal deformation of the packaging bag still needs to be arranged by an arrangement mechanism. If the arrangement mechanism does not arrange the shape of the packaging bag, the success rate of the subsequent sealing operation will be reduced or the sealing effect will be reduced, and the existing arrangement mechanism needs to slide along the surface of the packaging bag to straighten the packaging bag in order to ensure the flatness of the packaging bag. Therefore, a sliding length needs to be left after filling, which limits the maximum filling capacity of the packaging bag, and in turn reduces the optional filling range. SUMMARY

[0003] The present application aims to provide a powder packaging system and a packaging method, which solves the problem that an additional packaging bag arrangement device needs to be used in the existing automatic packaging system and the arrangement process limits the maximum filling capacity.

[0004] The embodiments of the present application are implemented by the following technical solutions:

[0005] A powder packaging system includes: a filling machine, a clamping and fixing mechanism, a transport device, and a transfer device. The filling machine is used to fill powder into packaging bags. The clamping and fixing mechanism includes: clamps, at least two clamps, which are respectively disposed on both sides of the discharge port of the filling machine. The clamps have lateral and longitudinal degrees of freedom of movement. At least a portion of the clamp is used to press the inner wall of the bag opening against the outer wall of the discharge port of the filling machine. The transport device is located below the discharge port of the filling machine. The distance between the bearing surface of the transport device and the discharge port of the filling machine is greater than the height of the packaging bag. The transfer device is located beside the transport device. The transfer device includes: a placement plate, an integrated plate, a rotating arm, and a fixed plate. The placement plate has a longitudinal degree of freedom of movement and a horizontal degree of rotational freedom. During rotation, at least one position of the placement plate is located below the discharge port of the filling machine. The lower end of the integrated plate is connected to the placement plate. The rotating arm is rotatably connected to the end of the integrated plate away from the placement plate. There are at least two fixed plates, and one end of each fixed plate is slidably connected to the rotating arm.

[0006] Preferably, the clamping plate includes an arc-shaped plate and a strip plate, wherein the arc-shaped plate is used to press the inner wall of the bag opening of the packaging bag against the outer wall of the discharge port of the filling machine; the end of the arc-shaped plate is slidably connected to a strip plate, and the strip plate has a degree of freedom of movement in the horizontal direction.

[0007] Preferably, the clamping plate includes four arc-shaped plates; the ends of the arc-shaped plates are provided with fixed cylinders; one end of the strip plate is fitted inside the fixed cylinder and slidably connected to the inner wall of the fixed cylinder; the abutting end of the strip plate is provided with a protrusion; when the four arc-shaped plates are joined together to form a ring, the distance between two opposite protrusions is less than the distance between two opposite fixed cylinders.

[0008] Preferably, the powder packaging system further includes: a bag sealing device located beside the transport device; the transfer device further includes: a rotating platform and a lifting platform, the rotating platform being connected to the placement plate via an extension arm; during the rotation of the rotating platform, at least one position of the placement plate is located below the bag sealing device; the lifting platform is provided with a receiving groove; the bottom end of the rotating platform is received in the receiving groove.

[0009] Preferably, the extension arm includes a fixed part and a telescopic part, the fixed part being connected to the rotating platform; the telescopic part being fitted inside the fixed part and slidably connected to the fixed part; and the telescopic part being connected to the placement plate.

[0010] Preferably, the powder packaging system further includes: a guide rail, the extension direction of which is consistent with the extension direction of the transport device, and the lifting platform connected to the guide rail; during the movement of the lifting platform along the guide rail, the placement plate has at least two positions respectively located on opposite sides of the bag sealing device.

[0011] A powder packaging method, suitable for the aforementioned powder packaging system, includes the following steps:

[0012] S100. After the bag opening of the packaging bag is placed on the discharge port of the filling machine, drive the two clamping plates to move laterally so that the clamping plates hold and fix the packaging bag at the discharge port of the filling machine.

[0013] S200. Start the filling machine, put the powder into the packaging bag, and at the same time rotate the placement plate to the bottom of the packaging bag;

[0014] S300 After feeding is completed, the placement plate moves up to support the packaging bag, and then the clamping plate and the placement plate move down synchronously, so that the packaging bag is completely removed from the discharge port of the filling machine;

[0015] S400, Horizontally move the strip plate to flatten the bag opening of the packaging bag horizontally, then move the fixing plate so that the fixing plate clamps and fixes the bag opening in the flattened state. At this time, the height of the fixing plate is lower than the height of the clamping plate. Finally, move the clamping plate to make the clamping plate release the packaging bag.

[0016] S500: Rotate the placement plate to send the packaging bag into the bag sealing area.

[0017] Preferably, in step S400, after the strip plate flattens the opening of the packaging bag, the clamping plate is moved upward to make the packaging bag longitudinally straightened and flattened. Then, the fixing plate is moved to clamp and fix the opening of the bag in the flattened state. The clamping plate is moved upward a second time to make the packaging bag longitudinally straightened and flattened again.

[0018] Preferably, the distance between the transfer device and the transport device is less than the maximum distance between the transfer device and the bag sealing device;

[0019] The extension direction of the clamping plate in S100 is consistent with the width direction of the transport device;

[0020] The S500 includes: after rotating the placement plate, the transfer device moves toward the bag sealing device, and sends the bag opening of the packaging bag located above the fixed plate into the working area of ​​the bag sealing device;

[0021] After the bag is sealed, rotate the placement plate so that it is above the transport device. Place the bag on the transport device and move it to the next work area. Then, move the transfer device horizontally so that the placement plate is below the discharge port of the filling machine.

[0022] Preferably, the method for controlling the filling amount in S200 includes:

[0023] Obtain the minimum distance h between the fixing plate and the opening of the packaging bag; when the distance between the fixing plate and the opening of the packaging bag is greater than h, the opening of the bag above the fixing plate will bend.

[0024] Obtain the maximum filling volume D corresponding to the packaging bag at the bottom of the fixed plate, where kD is the filling volume in S200, and k is a constant, 0 < k < 1.

[0025] The present invention has at least the following beneficial effects:

[0026] This invention involves placing the bag opening onto the outlet of a filling machine. A horizontally moving clamping plate clamps and fixes the bag opening to the outer wall of the outlet. At this point, the bottom of the bag is suspended above the transport device. Filling then begins. After filling, a placement plate on a transfer device supports the bag from below. The clamping plate and placement plate are then lowered, causing the bag to detach from the outlet. Even after detachment, the placement plate remains above the transport device. Because the bag may shift upwards to support it, potentially deforming the opening, the clamping plate's longitudinal freedom of movement, synchronized with the placement plate's downward movement, serves two purposes: first, the upward repositioning of the clamping plate flattens the bag opening longitudinally, ensuring the bag opening remains flat while the fixing plate clamps and fixes it. After the bag opening is flattened longitudinally, the two fixing plates move relative to each other to clamp the bag opening. Then the clamps are released to expose the bag opening that was originally covered by the clamps. This part of the bag opening is located above the fixing plates and is relatively short, thus maintaining an upright position. Finally, the placement plate is rotated to send the packaging bag to the bag sealing area. In the bag sealing area, the bag above the fixing plates is sealed by heat pressing and / or by tying with rope. Then the packaging bag is sent to the next work area, such as the palletizing area.

[0027] Another purpose of the longitudinal freedom of movement of the clamping plate in this invention is that when the packaging bag is longitudinally taut, the side of the packaging bag above the powder is tilted. If the fixing plate moves laterally to directly clamp the packaging bag, the distance between the first contact point a between the fixing plate and the packaging bag and the bottom wall point b of the clamping plate is greater than the clamping width of the fixing plate. As a result, the packaging bag above point a may wrinkle, affecting the subsequent sealing effect or sealing success rate. This problem can be solved by the movement of the clamping plate. In order to solve the problem of packaging bag wrinkling during the clamping process, the sorting device in the prior art usually does not use a direct lateral clamping method, but uses a rotation clamping method, using the downward rotational force to tighten the packaging bag. However, during the rotation clamping process, the fixing plate needs to slide a certain distance along the surface of the packaging bag, and the final clamping point is relatively far away from the clamping plate. Sufficient distance needs to be left for the unfilled area of ​​the tilted part below, thus limiting its maximum filling volume. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a powder packaging system;

[0030] Figure 2 This is a schematic diagram of the clamping plate structure;

[0031] Figure 3 for Figure 2 Detailed view of point A in the middle;

[0032] Figure 4 A top view of the process of placing the plate back into the filling machine;

[0033] Figure 5 This is a top view of the powder packaging system;

[0034] Figure 6 This is a second top view of the powder packaging system;

[0035] Figure 7 This is the third top view of the powder packaging system;

[0036] Figure 8 This is the fourth top view of the powder packaging system;

[0037] Figure 9 This is the fifth top view of the powder packaging system;

[0038] Figure 10A simplified diagram showing the horizontal and vertical states of the fixed plate;

[0039] Figure 11 This is a schematic diagram of the first clamping of the fixing plate;

[0040] Figure 12 This is a schematic diagram of the second clamping mechanism for the fixed plate;

[0041] Icons: 1-Filling machine, 2-Clamping plate, 21-Arc plate, 211-Fixed cylinder, 22-Strip plate, 221-Protrusion, 3-Transporting device, 4-Transfer device, 41-Placement plate, 42-Integrated plate, 43-Rotating arm, 44-Fixed plate, 45-Rotating platform, 46-Extension arm, 461-Fixed part, 462-Telescopic part, 47-Lifting platform, 5-Bag sealing device, 6-Guide rail, 7-Packaging bag. Detailed Implementation

[0042] To make the objectives, methods, and advantages of the embodiments of the present invention clearer, the methods in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0043] Sodium sulfate is an extremely fine powder, and during the filling process, it easily escapes from the packaging bag. Therefore, current technology often clamps the bag opening at the filling machine's outlet to maintain a tight seal and prevent powder leakage. When clamping the bag at the outlet, there are typically two states: the bag is placed directly on the conveyor, or it is suspended in the air. If the bag is placed directly on the conveyor, it can be transported directly to the sealing area after filling. However, as the bag moves horizontally to detach from the filling machine's outlet, the bag opening changes shape, requiring subsequent sealing to reshape it. This typically necessitates the use of workers, making full automation difficult. When the packaging bag is suspended in the air, after filling, if there is support below the packaging bag, the packaging bag can be moved down as a whole and removed from the discharge port of the filling machine, thereby reducing or avoiding lateral deformation of the packaging bag opening. However, the longitudinal deformation of the packaging bag still requires a sorting mechanism. Without a sorting mechanism to sort the shape of the packaging bag, the success rate of the subsequent sealing operation will be reduced or the sealing effect will be reduced. In order to ensure the flatness of the packaging bag, the existing sorting mechanism needs to slide along the surface of the packaging bag to straighten the packaging bag. Therefore, the aforementioned sliding length needs to be left after filling, which limits the maximum filling volume of the packaging bag and thus reduces the selectable filling range.

[0044] Example 1: As Figure 1As shown, a powder packaging system includes: a filling machine 1, a clamping and fixing mechanism, a transport device 3, and a transfer device 4. The filling machine 1 is used to fill powder into packaging bags 7. The clamping and fixing mechanism includes: clamping plates 2, at least two of which are respectively disposed on both sides of the discharge port of the filling machine 1. The clamping plates 2 have lateral and longitudinal degrees of freedom of movement. At least a portion of the clamping plate 2 is used to press the inner wall of the bag opening of the packaging bag 7 against the outer wall of the discharge port of the filling machine 1. The transport device 3 is located below the discharge port of the filling machine 1. The distance between the bearing surface of the transport device 3 and the discharge port of the filling machine 1 is greater than the height of the packaging bag 7. The transfer device 4 is located beside the transport device 3. The transfer device 4 includes: a placement plate 41, an integrated plate 42, a rotating arm 43, and a fixed plate 44. The placement plate 41 has a longitudinal degree of freedom of movement and a horizontal degree of rotational freedom. During rotation, at least one position of the placement plate 41 is located below the discharge port of the filling machine 1. The lower end of the integrated plate 42 is connected to the placement plate 41. The rotating arm 43 is rotatably connected to the end of the integrated plate 42 away from the placement plate 41. There are at least two fixed plates 44, and one end of each fixed plate 44 is slidably connected to the rotating arm 43.

[0045] In specific implementation, the lateral and longitudinal degrees of freedom of movement of the components in this invention can be driven by cylinders, which can also provide a certain clamping force. For example, the lateral movement of the clamping plate 2 can be driven by a cylinder, and the longitudinal movement can be driven by the vertical guide rail 6. The rotation of the components in this invention can be driven by a rotary motor, such as the rotation of the rotating arm 43. All sliding in this invention can adopt a slide rail slider structure.

[0046] The clamping and fixing mechanism can be installed as a separate device beside the transport device 3, or it can be installed on the side baffle of the transport device 3 or on the body of the filling machine 1. The transport device 3 can use an existing belt conveyor. A chute can be provided on the rotating arm 43, and a slider that cooperates with the chute can be provided on the fixed plate 44 to achieve a sliding connection between the fixed plate 44 and the rotating arm 43. The movement of the slider can also be driven by a cylinder. The rotational degree of freedom of the placement plate 41 in the horizontal direction refers to the ability of the placement plate 41 to revolve around a certain point.

[0047] For usage instructions, please refer to the following:

[0048] Using existing bagging devices or manual labor, the opening of the packaging bag 7 is placed over the outlet of the filling machine 1. The clamping plate 2 is then moved horizontally to clamp and fix the opening of the packaging bag 7 to the outer wall of the outlet of the filling machine 1. At this time, the bottom of the packaging bag 7 is suspended above the transport device 3. Filling then begins. After filling is complete, the placement plate 41 on the transfer device 4 supports the packaging bag 7 from below. Then, the clamping plate 2 and placement plate 41 are lowered as a whole, causing the packaging bag 7 to detach from the outlet of the filling machine 1. When the packaging bag 7 detaches from the outlet, the placement plate 41 remains above the transport device 3. Because the packaging bag 7 will move upwards to some extent during the upward movement of the placement plate 41 to ensure effective support, leading to deformation of the bag opening, one purpose of setting the clamping plate 2 with longitudinal freedom of movement and moving it downwards synchronously with the placement plate 41 in this embodiment is to simultaneously flatten the bag opening longitudinally during the upward reset process of the clamping plate 2, so that the bag opening can be in a flattened state when the fixing plate 44 clamps and fixes the shape of the bag opening. After the bag opening is flattened longitudinally, the two fixing plates 44 move relative to each other to clamp the bag opening. Then the clamping plate 2 is released to expose the bag opening that was originally covered by the clamping plate 2. This part of the bag opening is located above the fixing plate 44 and is relatively short, so it can be kept upright. Finally, the placement plate 41 is rotated to send the packaging bag 7 to the bag sealing area. In the bag sealing area, the bag above the fixing plate 44 is sealed by heat pressing and / or by tying rope. Then the packaging bag 7 is sent to the next work area, such as the palletizing area.

[0049] In this embodiment, another purpose of providing longitudinal freedom of movement for the clamping plate 2 and allowing it to move downwards synchronously with the placement plate 41 is: See... Figure 11 When the packaging bag 7 is stretched vertically, the side of the packaging bag 7 above the powder is tilted. If the fixing plate 44 moves laterally to directly clamp the packaging bag 7, the distance between the first contact point a between the fixing plate 44 and the packaging bag 7 and the bottom wall point b of the clamping plate 2 is greater than the clamping width of the fixing plate 44. As a result, the portion of the packaging bag 7 above point a may wrinkle, affecting the subsequent sealing effect or sealing success rate. This problem can be solved by moving the clamping plate 2.

[0050] As an example, during the process of clamping the packaging bag 7 with the fixing plate 44, in the initial state, the upper wall of the fixing plate 44 is close to the lower wall of the clamping plate 2. After the fixing plate 44 comes into contact with the packaging bag 7, it continues to move. At this time, the clamping plate 2 moves upward synchronously, always keeping the packaging bag 7 taut. The upward speed v of the clamping plate 2 can be equal to (LD) / t, where L is the distance between points a and b, D is the width of the fixing plate 44, and t is the time from point a to the end of clamping. ab can be easily obtained from the length, width, and filling height of the packaging bag 7, i.e., calculated. Figure 11 The angle of the inclined packaging bag 7 above the powder material is then adjusted to match the width of the fixing plate 44 to obtain L.

[0051] As an example, after the fixing plate 44 clamps the packaging bag 7, the clamping plate 2 does not immediately release the packaging bag 7, but continues to move upwards to a certain height, so that the opening of the packaging bag 7 is straightened and wrinkles are eliminated. However, it should be noted that the clamping force between the fixing plates 44 should not be too large at this time, to avoid the fixing plates 44 restricting the elimination of wrinkles. The fixing plate 44 does not actually need to apply clamping force, as it does not need to bear the weight of the powder, but only needs to maintain the shape of the bag opening above the fixing plate 44. Of course, to avoid the bag opening shifting between the fixing plates 44 due to external force, it is best to apply a certain force, that is, the fixing plate 44 can reapply clamping force or increase the clamping force after the clamping plate 2 moves upwards to eliminate wrinkles.

[0052] In existing sorting devices, to address the issue of 7 folds in the packaging bag during the clamping process, they typically do not employ a direct lateral clamping method, but rather... Figure 12 As shown, the packaging bag 7 is tightened by rotating and clamping, using the downward rotational force. However, during the rotation and clamping process, the fixing plate 44 needs to slide a certain distance along the surface of the packaging bag 7. The final clamping point is relatively far away from the clamping plate 2, and the unfilled area of ​​the lower inclined part needs to leave enough distance, thus limiting its maximum filling volume. As an example, when vacuum sealing packaging is performed later, the effective packaging volume of the packaging bag 7 will be reduced.

[0053] One purpose of the rotating arm 43 in this embodiment is to prevent the placement plate 41 from resetting from the bag sealing area to below the filling machine 1. The packaging bag 7 restricts the horizontal movement of the rotating arm 43, thereby restricting the placement plate 41 from moving below the packaging bag 7. Without the rotating arm 43, to avoid the aforementioned restriction, the height of the packaging bag 7 needs to be increased, that is, the height of the filling machine 1 needs to be increased, which increases the cost. With the rotating arm 43, the fixing plate 44 can be rotated to a vertical state. When the fixing plate 44 is needed to clamp the bag opening, it can be rotated to a horizontal state.

[0054] One of the purposes of setting the fixing plate 44 in this embodiment is to reduce the subsequent handling work in the sealing area. If the fixing plate 44 does not maintain the shape of the packaging bag 7 during the process of transferring the packaging bag 7 to the bag sealing area, additional bag handling is required when sealing the bag.

[0055] One purpose of the placement plate 41 in this embodiment is that, during the filling process, the packaging bag 7 is fixedly held in place by the clamping plates 2 at the outlet of the filling machine 1. For large-volume packages, sufficient clamping force is required between the two clamping plates 2 to ensure clamping stability and thus ensure a tight fit between the packaging bag 7 and the outlet of the filling machine 1. Without the placement plate 41 supporting the packaging bag 7 from below, the force between the two clamping plates 2 cannot be reduced in order to hold the packaging bag 7, which would hinder the packaging bag 7 from detaching from the filling machine 1. With the placement plate 41, the packaging bag 7 is supported by the placement plate 41, and the force between the two clamping plates 2 can be appropriately reduced, making it easier for the packaging bag 7 to detach from the filling machine 1.

[0056] Example 2: To make the packaging bag 7 flatter, improvements were made based on Example 1, such as... Figure 2 As shown, in this embodiment, the clamping plate 2 includes an arc-shaped plate 21 and a strip plate 22. The arc-shaped plate 21 is used to press the inner wall of the bag opening of the packaging bag 7 against the outer wall of the discharge port of the filling machine 1. The end of the arc-shaped plate 21 is slidably connected to a strip plate 22, and the strip plate 22 has a degree of freedom of movement in the horizontal direction.

[0057] In the specific implementation process, the discharge port of the filling machine 1 is mainly circular. Therefore, in this embodiment, an arc-shaped plate 21 is provided so that the clamping plate 2 can fit with the discharge port of the filling machine 1. After the packaging bag 7 is separated from the filling machine 1, the bag opening part that was originally fitted with the discharge port of the filling machine 1 is not flattened. At this time, the strip plates 22 on both sides move in opposite directions in the horizontal direction, which can straighten the bag opening through the pulling force.

[0058] Example 3: To facilitate the removal of the packaging bag 7 from the discharge port of the filling machine 1, improvements were made based on Example 2, such as... Figures 2-3 As shown, the clamping plate 2 includes four arc-shaped plates 21; the ends of the arc-shaped plates 21 are provided with fixing cylinders 211; one end of the strip plate 22 is fitted inside the fixing cylinder 211 and slidably connected to the inner wall of the fixing cylinder 211; the abutting end of the strip plate 22 is provided with a protrusion 221; when the four arc-shaped plates 21 are joined together to form a ring, the distance between two opposite protrusions 221 is less than the distance between two opposite fixing cylinders 211.

[0059] In the specific implementation process, when the clamping plate 2 clamps and fixes the bag opening to the discharge port of the filling machine 1, the strip plate 22 applies pressure to both sides of the bag body through the protrusion 221, and the arc plate 21 applies pressure to the part of the bag body that fits against the discharge port of the filling machine 1. However, at this time, the distance between the two opposing fixed cylinders 211 is greater than the thickness of the bag opening after it is closed, that is, the bag body can curl to a certain extent in the gap between the two fixed cylinders 211. During the filling process, the free end of the strip plate 22 moves away from the fixed cylinders 211 so that the bag opening between the two fixed cylinders 211 is closed. After filling is completed, the free end of the strip plate 22 moves towards the fixed cylinders 211. At this time, since the bag opening part between the strip plates 22 will not bend, a part of the bag opening will curl between the two fixed cylinders 211 and then along... Figure 2 The clamping plate 2 is moved horizontally in the direction of the middle arrow, moving it away from the outlet of the filling machine 1. At this time, the bag body curled between the fixed cylinders 211 gradually extends, and the bag opening between the arc plates 21 gradually detaches from the outlet of the filling machine 1. Consequently, when the clamping plate 2 is moved downward, the packaging bag 7 is more easily detached from the outlet of the filling machine 1. In addition, when the bag opening is clamped and fixed to the outlet of the filling machine 1 by the clamping plate 2, the sliding strip plate 22 ensures the airtightness of the bag opening and prevents powder from escaping.

[0060] In this embodiment, the sliding of the strip plate 22 not only enables the packaging bag 7 to be horizontally flattened after it leaves the filling machine outlet, but also makes it easier for the packaging bag 7 to leave the filling machine 1 through the gap fit with the fixed cylinder 211.

[0061] Example 4: Figure 1 As shown, in this embodiment, the powder packaging system further includes: a bag sealing device 5, which is located beside the transport device 3; the transfer device 4 further includes: a rotating platform 45 and a lifting platform 47, the rotating platform 45 being connected to the placement plate 41 via an extension arm 46; during the rotation of the rotating platform 45, at least one position of the placement plate 41 is located below the bag sealing device 5; the lifting platform 47 is provided with a receiving groove; the bottom end of the rotating platform 45 is received in the receiving groove.

[0062] In practice, the bag sealing device 5 is existing equipment, and the bag is typically sealed using heat pressing, tying with rope, or a combination of both. The existing bag sealing device 5 may include features such as... Figure 1 The two plates shown can be used as heating plates if heat sealing is used. After placing the opening of the packaging bag 7 between the two plates, the heat sealing operation is performed. If a rope seal is used, the opening of the packaging bag 7 passes between the two plates, and then the edge is folded by the folding operation of the bag sealing device 5 before being sealed with a rope. This is commonly used for sealing woven bags.

[0063] The rotation of the rotating platform 45 can be driven by a rotary motor. A cylinder can be installed below the lifting platform 47 to control the lifting and lowering of the platform. The rotation of the rotating platform 45 can drive the placement plate 41 to rotate, and the lifting and lowering of the lifting platform 47 can drive the placement plate 41 to move longitudinally. To ensure the structural stability of the extension arm 46, it can be as follows: Figure 1 As shown, a reinforcing column is provided below the extension arm 46 to form a triangular stabilizing structure.

[0064] Example 5: To avoid the deployment of the new transport device 3, improvements were made based on Example 4, such as... Figure 1 and Figure 4 As shown, in this embodiment, the extension arm 46 includes a fixed part 461 and a telescopic part 462. The fixed part 461 is connected to the rotating platform 45. The telescopic part 462 is fitted inside the fixed part 461 and is slidably connected to the fixed part 461. The telescopic part 462 is connected to the placement plate 41.

[0065] In the specific implementation process, after the extension arm 46 is set as a telescopic structure, the distance between the placement plate 41 and the rotating platform 45 can be changed by telescoping. If the length of the extension arm 46 is fixed, after the packaging bag 7 is sealed, if it is desired to reverse the rotation of the rotating platform 45 to send the packaging bag 7 back to the transport device 3, and then have the transport device 3 send it to the next work area, the position after the rotation reset will be below the filling machine 1, that is, the sealed packaging bag 7 will interfere with the packaging bag 7 being filled, thus requiring a new transport line to be laid out. The distance between the bag sealing device 5 and the rotating platform 45 is greater than the distance between the transport device 3 and the rotating platform 45. The extension arm 46 gradually extends during the process of rotating the placement plate 41 to below the bag sealing device 5. During the reverse rotation of the placement plate 41, if Figure 4 As shown, since the length of the extension arm 46 is greater than the distance between the transport device 3 and the rotating platform 45, the placement plate 41 reaches above the transport device 3 before it reaches below the filling machine 1. At this point, the existing robotic arm can clamp the packaging bag 7 and place it on the transport device 3. During the clamping process, the orientation of the packaging bag 7 can be adjusted by turning. After the packaging bag 7 is placed down, the placement plate 41 continues to rotate to below the filling machine 1. During the rotation, the extension arm 46 gradually shortens. By utilizing the resetting process of the placement plate 41, the transfer of the packaging bag 7 on the original transport device 3 is realized.

[0066] Example 6: As Figures 5-8 As shown, in this embodiment, the powder packaging system further includes: a guide rail 6, the extension direction of the guide rail 6 being consistent with the extension direction of the transport device 3, and the lifting platform 47 being connected to the guide rail 6; during the movement of the lifting platform 47 along the guide rail 6, the placement plate 41 has at least two positions respectively located on opposite sides of the bag sealing device 5.

[0067] In specific implementation, when the bag sealing device 5 seals the bag with a tie, there are at least two tying methods. The first is that the packaging bag 7 remains stationary while the tie mechanism moves along the width of the packaging bag 7. The second is that the tie mechanism is different, and the tie point moves by the horizontal movement of the packaging bag 7. This embodiment is designed to better adapt to the second situation, such as... Figure 5 As shown, an additional guide rail 6 is provided, and relative to... Figure 1 The extension direction of the fixing plate 44 and the orientation of the bag sealing device 5 were changed. After the rotating platform 45 rotated, as shown... Figure 6 As shown, at this time, the width direction of the packaging bag 7 can cooperate with the bag sealing device 5, and then when the transfer device 4 moves along the guide rail 6 toward the bag sealing device 5, the bag opening of the packaging bag 7 can be opened as shown. Figure 7 As shown, the bag passes through the working area of ​​the bag sealing device 5, and the bag opening is sealed with a drawstring by moving the bag. Then, the rotating platform rotates in the opposite direction. Figure 8 As shown, the placement plate 41 is rotated above the transport device 3. At this time, the position of the placement plate 41 is offset from the filling machine 1 and will not interfere with the packaging bag 7 being filled. After the sealed packaging bag 7 is placed on the transport device 3, the transfer device 4 moves along the guide rail 6. Figure 9 As shown, the placement plate 41 is moved below the filling machine 1, thereby achieving a reset.

[0068] After setting the guide rail 6, it can not only adapt to the bag sealing device 5 that does not move horizontally with the rope tying mechanism, but also avoid interference between the sealed packaging bag 7 and the packaging bag 7 being filled during the resetting process of the placement plate 41 carrying the packaging bag 7.

[0069] To avoid interference between the fixing plate 44 and the packaging bag 7 being filled, the placement plate 41 can be moved to the filling machine 1 as follows: Figure 10 As shown, the fixed plate 44 is rotated from a horizontal to a vertical position. A groove can be provided on the integrated plate 42, and the fixed plate 44 is slidably connected to the groove via a slider. The movement of the slider can be driven by a cylinder. At this time, the rotating arm 43 is a pivot, and the fixed plate 44 is rotatably connected to the slider via the pivot. The upper end of the slider is provided with a clearance notch for the rotation of the fixed plate 44, and the bottom wall of the notch is used to support the fixed plate 44 in the horizontal position. The rotation of the fixed plate 44 can be driven by a rotary motor.

[0070] Example 7: This example provides a powder packaging method suitable for the aforementioned powder packaging system, comprising the following steps:

[0071] S100. After the bag opening of the packaging bag 7 is placed on the discharge port of the filling machine 1, drive the two clamping plates 2 to move laterally so that the clamping plates 2 clamp and fix the packaging bag 7 to the discharge port of the filling machine 1.

[0072] S200. Start the filling machine 1, put the powder into the packaging bag 7, and at the same time rotate the placement plate 41 to the bottom of the packaging bag 7.

[0073] S300 After feeding is completed, the placement plate 41 moves up to support the packaging bag 7, and then the clamping plate 2 moves down synchronously with the placement plate 41, so that the packaging bag 7 is completely removed from the discharge port of the filling machine 1.

[0074] S400, move the horizontal strip plate 22 to flatten the opening of the packaging bag 7 horizontally, then move the fixing plate 44 so that the fixing plate 44 clamps and fixes the opening of the bag in the flattened state. At this time, the height of the fixing plate 44 is lower than the height of the clamping plate 2. Finally, move the clamping plate 2 so that the clamping plate 2 releases the packaging bag 7.

[0075] S500, rotate the placement plate 41 to send the packaging bag 7 into the bag sealing area.

[0076] In the specific implementation process, the height of the fixing plate 44 being lower than the height of the clamping plate 2 means that the fixing plate 44 is located below the clamping plate 2. After the clamping plate 2 is released, the exposed bag opening of the packaging bag 7 is sealed in the bag sealing area. After the packaging bag 7 is removed from the discharge port of the filling machine 1, the two sides of the bag opening that were originally attached to the discharge port of the filling machine 1 move away from each other. If the bag opening is not flattened by the horizontally moving strip plate 22, the flatness of the bag opening above the fixing plate 44 will not be sufficient after the fixing plate 44 is clamped.

[0077] Example 8: In this example, in step S400, after the strip plate 22 flattens the opening of the packaging bag 7, the clamping plate 2 is moved upward to make the packaging bag 7 longitudinally straightened and flattened. Then, the fixing plate 44 is moved to clamp and fix the opening of the bag in the flattened state. The clamping plate 2 is moved upward a second time to make the packaging bag 7 longitudinally straightened and flattened again.

[0078] In the specific implementation process, since this embodiment needs to effectively support the weight of the packaging bag 7 by moving the placement plate 41 upwards, the packaging bag 7 is no longer taut in the longitudinal direction. If the fixing plate 44 directly clamps it, wrinkles are likely to form at the clamping point. Therefore, this embodiment uses the resetting process of the clamping plate 2 to taut the packaging bag 7 in the longitudinal direction, and then uses the fixing plate 44 to clamp and fix the shape of the bag opening of the packaging bag 7. The fixing plate 44 can be close to the lower wall of the clamping plate 2. The purpose of moving the clamping plate 2 upwards a second time is to eliminate the wrinkles generated when the fixing plate 44 clamps it by moving laterally.

[0079] Example 9: In this example, the distance between the transfer device 4 and the transport device 3 is less than the maximum distance between the transfer device 4 and the bag sealing device 5;

[0080] The extension direction of the clamping plate 2 in S100 is consistent with the width direction of the transport device 3;

[0081] The S500 includes: after rotating the placement plate 41, the transfer device 4 moves toward the bag sealing device 5, and sends the bag opening of the packaging bag 7 located above the fixed plate 44 into the working area of ​​the bag sealing device 5.

[0082] After the bag is sealed, the placement plate 41 is rotated so that it is above the transport device 3. The packaging bag 7 is placed on the transport device 3 and then transported to the next work area. Then the transfer device 4 is moved horizontally so that the placement plate 41 is below the discharge port of the filling machine 1.

[0083] In specific implementation, the working area of ​​the bag sealing device 5 refers to, for example, Figure 1 As shown, the area between the two plates can be a heating plate for heat sealing or a limiting plate for rope sealing. During rope sealing, the bag opening is located between the two limiting plates with the end extending upwards from between them. Then, the folding device of the existing bag sealing device 5 is used to press the portion of the bag protruding above the limiting plates from a vertical position to a horizontal position before rope sealing. The next work area can be a palletizing area. When using the powder packaging device provided in Embodiment 5, the transfer device 4 cannot move; the maximum distance is the distance between the transfer device 4 and the bag sealing device 5, thereby reducing the need for new transport devices 3. In the aforementioned case, as... Figure 1 As shown, the placement plate 41 rotates to a position below the bag sealing device 5, and then the lifting platform 47 rises to move the bag above the fixing plate 44 between two sealing components, such as between two heating plates, to achieve heat sealing. When using the powder packaging device provided in Embodiment 6, as... Figure 6 As shown, the placement plate 41 needs to be rotated to the side of the bag sealing device 5, so the distance between the transfer device 4 and the transport device 3 needs to be less than the maximum distance between the transfer device 4 and the bag sealing device 5. The maximum distance can be the distance between the rotating platform 45 and the bag sealing device 5 when the placement plate 41 is located below the discharge port of the filling machine 1.

[0084] Example 10: In this example, the method for controlling the filling amount in S200 includes:

[0085] Obtain the minimum distance h between the fixing plate 44 and the opening of the packaging bag 7; when the distance between the fixing plate 44 and the opening of the packaging bag 7 is greater than h, the opening of the bag located above the fixing plate 44 will be bent.

[0086] Obtain the maximum filling amount D corresponding to the packaging bag 7 below the fixed plate 44, kD is the filling amount in S200, k is a constant, 0 < k < 1.

[0087] In specific implementation, the powder packaging system provided in this embodiment can provide the powder filling volume, and the powder filling volume is related to... Figure 11The length of the sloping portion of the packaging bag 7 above the powder is related to the filling volume. The shorter the required length during packaging, the higher the maximum filling volume, and thus a wider range of filling volume options. Appropriate filling volumes can be selected based on different packaging bag 7 materials, powder characteristics, and sealing methods, effectively utilizing the packaging volume of the packaging bag 7, reducing economic costs, and minimizing the use of the packaging bag 7, resulting in greater environmental friendliness. D refers to the filling volume corresponding to filling the packaging bag 7 below the fixing plate 44 completely. k can be determined based on the required packaging margin. For example, if some powders have a certain degree of water absorption, and the packaging uses a woven bag or similar breathable bag, it may expand in volume due to water absorption during storage. Therefore, a certain amount of margin is needed inside the packaging bag 7 to reduce the compression of the packaging bag 7 by the powder. For example, k = 0.7. When using plastic bags and vacuum packaging, the filling volume can be close to D, with k = 0.95 for example.

[0088] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A powder packaging system, characterized by The application relates to a filling machine (1) for filling powder into a packaging bag (7), which comprises: a clamping and fixing mechanism, which comprises: two clamping plates (2), which are arranged on the two sides of the discharge port of the filling machine (1) and have transverse and longitudinal movement freedom, and at least a part of the plate body is used for pressing the inner wall of the bag opening of the packaging bag (7) to abut against the outer wall of the discharge port of the filling machine (1); a conveying device (3) arranged below the discharge port of the filling machine (1), wherein the distance between the bearing surface of the conveying device (3) and the discharge port of the filling machine (1) is greater than the height of the packaging bag (7); a transfer device (4) arranged beside the conveying device (3), which comprises: a placing plate (41) having longitudinal movement freedom and horizontal rotation freedom, wherein at least one position of the placing plate (41) is arranged below the discharge port of the filling machine (1) during rotation; an integrated plate (42) connected to the lower end of the placing plate (41); a rotating arm (43) rotationally connected to the end of the integrated plate (42) away from the placing plate (41); two fixing plates (44) slidingly connected to one end of the rotating arm (43); the clamping plate (2) comprises: an arc-shaped plate (21) used for pressing the inner wall of the bag opening of the packaging bag (7) to abut against the outer wall of the discharge port of the filling machine (1); a strip-shaped plate (22) slidingly connected to the end of the arc-shaped plate (21) and having horizontal movement freedom. The clamping plate (2) comprises four arc-shaped plates (21), the end of the arc-shaped plate (21) is provided with a fixing cylinder (211), one end of the strip-shaped plate (22) is sleeved in the fixing cylinder (211) and slidingly connected to the inner wall of the fixing cylinder (211), the abutting end of the strip-shaped plate (22) is provided with a protruding part (221), and the distance between the two opposite protruding parts (221) is smaller than the distance between the two opposite fixing cylinders (211) when the four arc-shaped plates (21) are closed to form a ring.

2. The powder packaging system of claim 1, wherein, The application further comprises:

3. The powder packaging system according to claim 1 or 2, characterized in that, a bag body sealing device (5) arranged beside the conveying device (3); the transfer device (4) further comprises: a rotating platform (45) connected to the placing plate (41) through an extension arm (46), wherein the placing plate (41) is arranged below the bag body sealing device (5) at least in one position during rotation of the rotating platform (45); a lifting platform (47) provided with a containing groove, and the bottom end of the rotating platform (45) is contained in the containing groove. the extension arm (46) comprises:

4. The powder packaging system of claim 3, wherein, ​ A fixed part (461) connected with the rotating platform (45); A telescopic part (462) sleeved in the fixed part (461) and slidably connected with the fixed part (461); the telescopic part (462) is connected with the placing plate (41).

5. The powder packaging system of claim 3, wherein, Comprise: A guide rail (6) whose extending direction is consistent with the extending direction of the conveying device (3); the lifting platform (47) is connected with the guide rail (6); during the movement along the guide rail (6), the placing plate (41) has at least two position states respectively on the opposite sides of the bag sealing device (5).

6. A method of packaging a powder, characterized by, The powder packaging system of any one of claims 1-5, comprising the following steps: S100, after the bag opening of the packaging bag (7) is sleeved on the discharge port of the filling machine (1), the two clamping plates (2) are driven to move transversely, so that the clamping plates (2) clamp and fix the packaging bag (7) on the discharge port of the filling machine (1); S200, the filling machine (1) is started, the powder is poured into the packaging bag (7), and the placing plate (41) is rotated to be below the packaging bag (7); S300, after the pouring is completed, the placing plate (41) moves upward to carry the packaging bag (7), and then the clamping plates (2) and the placing plate (41) move downward synchronously, so that the packaging bag (7) is completely separated from the discharge port of the filling machine (1); S400, the horizontal moving strip plate (22) horizontally flattens the bag opening of the packaging bag (7), then the fixed plate (44) is moved, so that the fixed plate (44) clamps and fixes the bag opening in the flattened state, at this time, the height of the fixed plate (44) is lower than the height of the clamping plate (2), and finally the clamping plate (2) is moved to release the packaging bag (7); S500, the placing plate (41) is rotated to send the packaging bag (7) into the bag sealing area.

7. The method of packaging a powder according to claim 6, wherein, In the S400, after the strip plate (22) flattens the bag opening of the packaging bag (7), the clamping plate (2) is moved upward to make the packaging bag (7) be longitudinally straightened and flattened, then the fixed plate (44) is moved to make the fixed plate (44) clamp and fix the bag opening in the flattened state, and the clamping plate (2) is moved upward again to make the packaging bag (7) be longitudinally straightened and flattened again.

8. A method of packaging a powder according to claim 6 or 7, characterized in that, The distance between the transfer device (4) and the conveying device (3) is less than the maximum distance between the transfer device (4) and the bag sealing device (5); In the S100, the extending direction of the clamping plate (2) is consistent with the width direction of the conveying device (3); The S500 comprises the following steps: after the placing plate (41) is rotated, the transfer device (4) moves towards the bag sealing device (5) to send the bag opening of the packaging bag (7) above the fixed plate (44) into the working area of the bag sealing device (5); After the bag sealing is completed, the placing plate (41) is rotated to be above the conveying device (3), the packaging bag (7) is placed on the conveying device (3), and then the transfer device (4) is moved horizontally to make the placing plate (41) be below the discharge port of the filling machine (1).

9. The method of packaging a powder according to claim 8, wherein, The control method of the filling amount in the S200 comprises: Obtaining the minimum distance h between the fixing plate (44) and the bag opening of the packaging bag (7); when the distance between the fixing plate (44) and the bag opening of the packaging bag (7) is greater than h, the bag opening above the fixing plate (44) is bent; Obtaining the maximum filling amount D corresponding to the lower packaging bag (7) of the fixing plate (44), kD is the filling amount in S200, and k is a constant, 0

Images