A packaging bag bottom processing and shaping mechanism

Abstract

The utility model discloses a packaging bag bottom processing shaping mechanism, including frame and being located on the gusset mechanism, sealing mechanism and shaping mechanism of frame, the lower portion of shaping mechanism is equipped with the receiving bin, and shaping mechanism includes the front push plate unit and rear push plate unit. The utility model discloses through gusset mechanism to the both sides of packaging bag bottom gusset folding, forms the neat angle, and sealing mechanism is closed to the folding part and is cut off, guarantees the firmness of closing and the smoothness of cutout, and the push plate unit of high and low relative extrusion shaping is used to the bottom in shaping mechanism, can let packaging bag steadyly receive material, can effectively eliminate the taper of packaging bag bottom simultaneously, makes the bottom more even, furthermore, the receiving bin realizes the further forming of packaging bag bottom with the help of gravity effect, the compact structure of each mechanism of the utility model, and the cooperation of multiple mechanisms, effectively improve the packaging efficiency, and improve the processing quality of packaging bag bottom.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and more specifically, to a packaging bag bottom processing and shaping mechanism. Background Technology

[0002] In the production and processing of packaging bags, the forming quality of the bottom directly affects the overall appearance and performance of the bag. Existing bottom processing equipment typically only performs simple sealing operations and struggles to precisely shape the bottom. This often results in tapered shapes and uneven corners on the bottom of the processed bags, affecting not only the packaging's aesthetics but also potentially causing uneven stress and breakage during subsequent material filling. While some improved equipment incorporates shaping structures, their complex designs often result in poor shaping effects and low production efficiency. Utility Model Content

[0003] This utility model provides a bottom processing and shaping mechanism for packaging bags to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: a bottom processing and shaping mechanism for packaging bags, including a frame and a corner insertion mechanism, a sealing mechanism, and a shaping mechanism disposed on the frame; a receiving bin is provided below the shaping mechanism; the corner insertion mechanism is used to perform corner overlapping processing on the bag opening of the packaging bag; the sealing mechanism is used to vertically seal and cut the packaging bag; the shaping mechanism includes a front push plate unit and a rear push plate unit, the front push plate unit includes a first cylinder and a first push plate, the first cylinder is connected to the frame, and the first push plate is disposed on the piston rod of the first cylinder; the rear push plate unit includes a second cylinder and a second push plate, the second cylinder is connected to the frame, and the second push plate is disposed on the piston rod of the second cylinder; the first push plate and the second push plate are arranged opposite to each other, and the first push plate moves above the second push plate; the receiving bin is used to receive the packaging bag processed by the sealing mechanism.

[0004] Preferably, the first push plate has an L-shaped cross-section, including a first vertical plate and a first horizontal plate. The first vertical plate is provided with a first vertical groove, and a bolt is provided on the first vertical groove to connect with the first cylinder. The second push plate has an L-shaped cross-section, including a second vertical plate and a second horizontal plate. The second vertical plate is provided with a second vertical groove, and a bolt is provided on the second vertical groove to connect with the second cylinder. The first horizontal plate is located above the second horizontal plate.

[0005] Preferably, the second push plate is provided with an air blowing pipe, one end of which is sealed and the other end is provided with an adapter for connecting an air source; the side wall of the air blowing pipe is provided with multiple air blowing holes, which are equally spaced; the air blowing holes are oriented toward the packaging bag.

[0006] Preferably, the corner insertion mechanism includes two corner insertion units symmetrically arranged on both sides of the frame; each corner insertion unit includes a fixed seat, a corner insertion cylinder, a transmission arm, an upper sliding seat, an upper sliding rod, a lower sliding seat, a lower sliding rod, a bag corner forming plate, and a limiting plate; the upper sliding seat, the fixed seat, and the lower sliding seat are sequentially arranged on the frame; the corner insertion cylinder is mounted on the fixed seat, and its piston rod is connected to the transmission arm; the upper sliding rod is slidably arranged on the upper sliding seat, with one end connected to the transmission arm and the other end connected to the bag corner forming plate; the lower sliding rod is slidably arranged on the lower sliding seat, with one end connected to the transmission arm and the other end connected to the limiting plate.

[0007] Preferably, the corner forming plate includes a straight plate and an inclined plate, the inclined plate having a triangular structure; the straight plate and the inclined plate are set at an included angle; a connecting block is provided on the back of the corner forming plate, a connecting rod is provided on the connecting block, and the connecting rod is connected to the upper sliding rod; the connecting block is provided with a horizontal sliding groove and a horizontal locking groove, and a hexagonal nut is engaged in the horizontal locking groove; the straight plate is provided with a longitudinal sliding groove, and a fastening screw that cooperates with the hexagonal nut is provided on the longitudinal sliding groove, the fastening screw and the hexagonal nut cooperating to connect the straight plate and the connecting block.

[0008] Preferably, the receiving hopper includes a base frame, on which a left side plate, a right side plate, and a back plate are provided. The top of the left side plate, the right side plate, and the back plate are all provided with guide ramps to facilitate the entry of packaging bags.

[0009] Preferably, the outer surfaces of the left side plate and the right side plate are respectively provided with reinforcing ribs, the reinforcing ribs are provided with mounting grooves, and are connected to the base frame by bolts on the mounting grooves; the base frame is provided with a propulsion cylinder, and the piston rod of the propulsion cylinder is connected to the back plate.

[0010] Preferably, the sealing mechanism includes a sliding frame, a sliding plate, a drive motor, a rotating arm, a first connecting rod, a second connecting rod, a first horizontal sealing seat, a second horizontal sealing seat, a cutting cylinder, and a cutter; the sliding frame is slidably disposed within the frame, and the sliding plate is slidably disposed within the sliding frame; the drive motor is disposed on the frame, and its output end is connected to the rotating arm; one end of the rotating arm is rotatably connected to the first connecting rod, and the other end is rotatably connected to the second connecting rod; the other end of the first connecting rod is rotatably connected to one end of the sliding frame; the other end of the second connecting rod is rotatably connected to the sliding plate; the first horizontal sealing seat is disposed on the sliding plate, and the second horizontal sealing seat is disposed at the other end of the sliding frame; the first horizontal sealing seat and the second horizontal sealing seat are arranged opposite to each other; the cutter is slidably disposed within the second horizontal sealing seat, and the first horizontal sealing seat has a groove that cooperates with the cutter; the cutting cylinder is disposed on the other end of the sliding frame, and its piston rod is connected to the cutter; heating elements are respectively disposed on the first horizontal sealing seat and the second horizontal sealing seat.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses an inserting corner mechanism to fold the bottom sides of the packaging bag into neat corners, and a sealing mechanism to seal and cut the folded part, ensuring a firm seal and a flat cut; the shaping mechanism uses high and low push plate units to squeeze and shape the bottom, which not only allows the packaging bag to stably receive materials, but also effectively eliminates the conical shape of the bottom of the packaging bag, making the bottom flatter; in addition, the receiving bin uses gravity to further shape the bottom of the packaging bag; the various mechanisms of this utility model have a compact structure, and the multiple mechanisms work together to effectively improve packaging efficiency and enhance the processing quality of the bottom of the packaging bag. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the packaging bag bottom processing and shaping mechanism according to an embodiment of the present utility model;

[0013] Figure 2 This is another structural view of the packaging bag bottom processing and shaping mechanism according to an embodiment of the present utility model;

[0014] Figure 3 This is another structural view of the packaging bag bottom processing and shaping mechanism according to an embodiment of the present utility model;

[0015] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0016] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0017] Figure 6This is a top view of the packaging bag bottom processing and shaping mechanism according to an embodiment of the present utility model;

[0018] Figure 7 This is a front view of the packaging bag bottom processing and shaping mechanism according to an embodiment of the present utility model;

[0019] Figure 8 This is a cross-sectional view of the packaging bag bottom processing and shaping mechanism according to an embodiment of the present utility model;

[0020] Figure 9 This is a structural diagram of the corner insertion mechanism of the bottom processing and shaping mechanism of the packaging bag according to an embodiment of the present utility model;

[0021] Figure 10 This is another structural view of the corner insertion mechanism of the packaging bag bottom processing and shaping mechanism according to an embodiment of the present utility model;

[0022] Figure 11 This is a structural diagram of the receiving bin of the packaging bag bottom processing and shaping mechanism according to an embodiment of the present utility model;

[0023] exist Figures 1 to 11 In the diagram, the correspondence between the component names and the drawing numbers is as follows:

[0024] 1--Frame, 2--Corner insertion mechanism, 21--Fixed seat, 22--Corner insertion cylinder, 23--Transmission arm, 24--Upper sliding seat, 25--Upper sliding rod, 26--Lower sliding seat, 27--Lower sliding rod, 28--Bag corner forming plate, 28a--Straight plate, 28b--Angled insertion plate, 28c--Longitudinal slide groove, 29--Limiting plate, 210--Connecting block, 210a--Horizontal slide groove, 210b--Horizontal slot, 211--Connecting rod, 212--Hexagonal nut, 213--Fasting screw, 3--Sealing mechanism, 31--Sliding frame, 32--Slide plate, 33--Drive motor, 34--Rotating arm, 35--First connecting rod, 36--Second connecting rod, 37-- - First horizontal sealing seat, 38--Second horizontal sealing seat, 39--Cutting cylinder, 310--Cutter, 4--Shaping mechanism, 41--First cylinder, 42--First push plate, 42a--First vertical plate, 42b--First horizontal plate, 42c--First vertical slide groove, 43--Second cylinder, 44--Second push plate, 44a--Second vertical plate, 44b--Second horizontal plate, 44c--Second vertical slide groove, 45--Air blowing pipe, 45a--Air blowing hole, 46--Adapter, 5--Receiving bin, 51--Base frame, 52--Left side plate, 53--Right side plate, 54--Back plate, 55--Guide slope, 56--Reinforcing rib plate, 57--Installation slide groove, 58--Propulsion cylinder. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0026] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please refer to Figures 1 to 11 This utility model provides a bottom processing and shaping mechanism 4 for packaging bags, including a frame 1 and a corner insertion mechanism 2, a sealing mechanism 3, and a shaping mechanism 4 mounted on the frame 1; a receiving bin 5 is provided below the shaping mechanism 4; the corner insertion mechanism 2 is used to perform corner overlapping processing on the bag opening of the packaging bag; the sealing mechanism 3 is used to vertically seal and cut the packaging bag; the shaping mechanism 4 includes a front push plate unit and a rear push plate unit, the front push plate unit including a first cylinder 41 and a first push plate 42, the first... Cylinder 41 is connected to the frame 1, and the first push plate 42 is disposed on the piston rod of the first cylinder 41; the rear push plate unit includes a second cylinder 43 and a second push plate 44, the second cylinder 43 is connected to the frame 1, and the second push plate 44 is disposed on the piston rod of the second cylinder 43; the first push plate 42 and the second push plate 44 are arranged opposite to each other, and the first push plate 42 moves above the second push plate 44; the receiving bin 5 is used to receive the packaging bag processed by the sealing mechanism 3.

[0029] In this embodiment of the utility model, the shaping mechanism 4 uses the frame 1 as a carrier to orderly integrate the corner insertion, sealing, shaping mechanism 4 and the receiving bin 5. Each unit has a clear function and is closely connected. First, the corner insertion mechanism 2 completes the pre-processing of the bag opening corner, providing a regular foundation for subsequent sealing; the sealing mechanism 3 simultaneously realizes vertical sealing and cutting, reducing process intervals; after the shaping mechanism 4 precisely shapes the bag, the receiving bin 5 receives the finished product. The overall processing process is closely coordinated and highly continuous.

[0030] Specifically, the corner-insertion mechanism 2 treats the overlapping corners of the bag opening to avoid problems such as rough edges and wrinkles during sealing, ensuring a tight seal and allowing the formed packaging bag to stand upright for convenient subsequent transportation and shelf placement. The sealing mechanism 3 uses horizontal heating to seal the packaging bag and then cuts it after sealing to meet the needs of continuous bagging and sealing. The shaping mechanism 4 adopts a relative arrangement structure with the first push plate 42 on top and the second push plate 44 below. Utilizing the staggered height structure of the two push plates, it can apply squeezing force from different height dimensions at the bottom of the packaging bag. Compared with flat extrusion, it can more comprehensively eliminate defects such as bottom cones and bulges, making the bottom force uniform and the flatness better. Both the front push plate unit and the rear push plate unit are driven by cylinders. The cylinders have fast response speed and stable power output. The squeezing force and speed can be controlled by adjusting the cylinder parameters to adapt to packaging bags of different thicknesses and materials. The receiving bin 5 is located below the shaping mechanism 4. After the packaging bag is shaped, it falls vertically into the bin under the action of gravity. On the one hand, this can avoid the deformation and damage caused by the packaging bag falling randomly after processing. On the other hand, the force on the bottom is further stabilized during the falling process, achieving the dual guarantee of shaping and natural forming, and ultimately improving the aesthetics of the packaging.

[0031] Furthermore, both the first cylinder 41 and the second cylinder 43 are dual-shaft cylinders.

[0032] The working process of this utility model is as follows: The packaging bag to be processed is conveyed to the working area of ​​the frame 1. The corner insertion mechanism 2 first performs corner overlapping on both sides of the bag opening to form a regular folded corner on the side of the bag opening. Then, the packaging bag after corner overlapping enters the sealing mechanism 3. The sealing mechanism 3 first completes the horizontal sealing of the corner overlapping part of the bag opening. After sealing, it is simultaneously cut to form an independent packaging bag to be shaped. The first cylinder 41 of the shaping mechanism 4 drives the upper first push plate 42 and the second cylinder 43 drives the lower second push plate 44 to move closer simultaneously, squeezing the bottom of the packaging bag from the upper and lower dimensions to eliminate bottom defects and make it flat. The packaging bag with the bottom shaped is conveyed downward until the top is sealed and cut and loses support. Under the action of gravity, it falls vertically into the receiving bin 5 below. While receiving, the packaging bag contacts the bottom of the receiving bin 5 during the falling process, further optimizing the bottom forming state, and finally forming a finished packaging bag with a flat bottom.

[0033] Preferably, the first push plate 42 has an L-shaped cross-section, including a first vertical plate 42a and a first horizontal plate 42b. The first vertical plate 42a is provided with a first vertical groove 42c, and a bolt is provided on the first vertical groove 42c to connect with the first cylinder 41. The second push plate 44 has an L-shaped cross-section, including a second vertical plate 44a and a second horizontal plate 44b. The second vertical plate 44a is provided with a second vertical groove 44c, and a bolt is provided on the second vertical groove 44c to connect with the second cylinder 43. The first horizontal plate 42b is located above the second horizontal plate 44b.

[0034] In this embodiment, both the first and second push plates 44 adopt an L-shaped cross-section structure. The vertical plate serves as the force-bearing carrier connected to the cylinder, while the horizontal plate serves as the working end that directly squeezes the packaging bag. The overall structure is more rigid, which can prevent the push plates from deforming during squeezing. The planar working surface of the horizontal plate can form a large-area contact with the bottom of the packaging bag. Compared with point or line squeezing, it can evenly transmit the squeezing force, reduce the damage to the packaging bag caused by excessive local squeezing, and ensure the flatness of the bottom. In addition, the first vertical groove 42c of the first vertical plate 42a and the second vertical groove 44c of the second vertical plate 44a are used with bolts to realize the adjustable connection between the push plate and the cylinder. Loosening the bolts can move the push plate up and down, and adjust the relative height and spacing of the first and second horizontal plates 44b according to different packaging bag specifications. The staggered design of the first horizontal plate 42b above the second horizontal plate 44b allows the two push plates to apply squeezing force from the "upper half area" and "lower half area" of the bottom of the packaging bag at the same time. This can specifically eliminate the deformation caused by material filling or molding deviation at the bottom, and also make the material distribution more uniform.

[0035] Furthermore, the first horizontal plate 42b and the second horizontal plate 44b have the same length, but the width of the first horizontal plate 42b is smaller than the width of the second horizontal plate 44b. This results in a larger coverage area for the second horizontal plate 44b, which can support the bottom of the entire packaging bag. Combined with the design that the first horizontal plate 42b is higher and the second horizontal plate 44b is lower, when the second horizontal plate 44b extends, it supports the bottom of the entire packaging bag, making the bottom of the packaging bag initially flat. When the first horizontal plate 42b extends, it pushes the already sealed and cut ends of the bottom of the packaging bag towards the second horizontal plate 44b, making the bottom seal fold flat. Under the compression of the material's own weight, the bottom of the packaging bag tends to be flat.

[0036] Before use, according to the specifications of the packaging bag to be shaped, loosen the bolts of the first vertical groove 42c on the first vertical plate 42a, move the first push plate 42 up and down to a suitable height, and then tighten the bolts to fix it. Similarly, adjust the height of the second push plate 44 by the second vertical groove 44c on the second vertical plate 44a to ensure that the first horizontal plate 42b is always above the second horizontal plate 44b and the spacing is suitable for the packaging bag. During operation, when the packaging bag is moved between the two push plates, the first cylinder 41 drives the first push plate 42 to move, and the second cylinder 43 drives the second push plate 44 to move. The first push plate 42 and the second push plate 44 are misaligned and jointly squeeze the bottom of the packaging bag to eliminate bottom defects and make it flat.

[0037] Preferably, the second push plate 44 is provided with an air blowing pipe 45, one end of which is sealed, and the other end is provided with an adapter 46 for connecting an air source. The side wall of the air blowing pipe 45 is provided with multiple air blowing holes 45a, which are equally spaced. The air blowing holes 45a are oriented towards the packaging bag. In this embodiment, the air blowing pipe 45 moves synchronously with the second push plate 44. After the air source is connected through the adapter 46, the airflow is ejected from the equally spaced air blowing holes 45a towards the packaging bag. The airflow can form an air film gap between the second push plate 44 and the packaging bag, and can also quickly reduce the temperature of the packaging bag, preventing the packaging bag from sticking to the second push plate 44.

[0038] Preferably, the corner insertion mechanism 2 includes two corner insertion units, which are symmetrically arranged on both sides of the frame 1. Each corner insertion unit includes a fixed seat 21, a corner insertion cylinder 22, a transmission arm 23, an upper sliding seat 24, an upper sliding rod 25, a lower sliding seat 26, a lower sliding rod 27, a pocket corner forming plate 28, and a limiting plate 29. The upper sliding seat 24, the fixed seat 21, and the lower sliding seat 26 are sequentially arranged on the frame 1. The corner insertion cylinder 22 is mounted on the fixed seat 21, and its piston rod is connected to the transmission arm 23. The upper sliding rod 25 is slidably arranged on the upper sliding seat 24, with one end connected to the transmission arm 23 and the other end connected to the pocket corner forming plate 28. The lower sliding rod 27 is slidably arranged on the lower sliding seat 26, with one end connected to the transmission arm 23 and the other end connected to the limiting plate 29.

[0039] In this embodiment, two corner-inserting units are symmetrically arranged on both sides of the frame 1, which can simultaneously perform corner-inserting processing on the left and right openings of the packaging bag. The units on both sides have completely identical structures and high synchronization, ensuring that the folded corners on both sides of the packaging bag remain consistent. During operation, when the piston rod of the corner-inserting cylinder 22 drives the transmission arm 23, it can simultaneously drive the upper sliding rod 25 and the lower sliding rod 27 to move, thereby achieving the coordinated action of the corner-forming plate 28 and the limiting plate 29. This embodiment has a simple structure and high synchronization, eliminating the need for two additional sets of drive components and avoiding asynchronous actions caused by parameter differences between the two drives. Driven by the corner-inserting cylinder 22, the corner-forming plate 28 directly acts on the side of the packaging bag, causing the side of the packaging bag to form a concave shape to achieve a folding effect. The limiting plate 29 is designed for the sealing mechanism 3. The limiting plate 29 can be inserted between the two horizontal seals of the sealing mechanism 3. In the corner-inserting state, the two horizontal seals cannot be closed. Only when the limiting plate 29 is removed can the sealing mechanism 3 perform sealing and cutting operations on the packaging bag. This structural design ensures that the corner insertion and sealing processes do not occur simultaneously, thus preventing situations where the bottom deforms or the packaging bag cannot stand up after sealing due to improper corner insertion.

[0040] Preferably, the corner forming plate 28 includes a straight plate 28a and an inclined plate 28b, the inclined plate 28b having a triangular structure; the straight plate 28a and the inclined plate 28b are arranged at an angle; a connecting block 210 is provided on the back of the corner forming plate 28, the connecting block 210 is provided with a connecting rod 211, the connecting rod 211 being connected to the upper sliding rod 25; the connecting block 210 is provided with a horizontal sliding groove 210a and a horizontal locking groove 210b, a hexagonal nut 212 being engaged in the horizontal locking groove 210b; the straight plate 28a is provided with a longitudinal sliding groove 28c, the longitudinal sliding groove 28c being provided with a fastening screw 213 cooperating with the hexagonal nut 212, the fastening screw 213 cooperating with the hexagonal nut 212 to connect the straight plate 28a to the connecting block 210. In this embodiment, the angled insert plate 28b adopts a triangular structure with a rounded transition at the tip of the insert corner, allowing the insert corner to be easily inserted into the side of the packaging bag, reducing friction and pulling on the bag material. Simultaneously, the angle between the straight plate 28a and the angled insert plate 28b guides the side of the bag opening to fold along a preset trajectory. The connecting block 210 and the straight plate 28a are connected via a horizontal groove 210a and a vertical groove 28c, enabling horizontal and vertical position adjustments. Specifically, the horizontal slide groove 210a, in conjunction with the snap-fit ​​hexagonal nut 212, allows the horizontal position of the entire bag corner forming plate 28 to be adjusted when the fastening screw 213 and the hexagonal nut 212 move relative to the connecting block 210. The longitudinal slide groove 28c on the straight plate 28a can adjust the vertical height between the straight plate 28a and the connecting block 210. At this time, the fastening screw 213 and the hexagonal nut 212 remain stationary relative to the connecting block 210, allowing the vertical position of the entire bag corner forming plate 28 to be adjusted to meet the processing requirements of bag corners of different heights.

[0041] Preferably, the receiving bin 5 includes a base frame 51, on which a left side plate 52, a right side plate 53, and a back plate 54 are provided. The tops of the left side plate 52, the right side plate 53, and the back plate 54 are all provided with guide ramps 55 to facilitate the entry of packaging bags. In this embodiment, the tops of the left side plate 52, the right side plate 53, and the back plate 54 are all provided with guide ramps 55, forming a three-way enclosed guide structure. When the packaging bag falls from the sealing mechanism 3, even if there is a slight deviation due to speed or angle, the guide ramps 55 can correct the deviation, preventing the bag from getting stuck at the bin opening. This ensures that the packaging bag enters the receiving bin 5 quickly and smoothly, guaranteeing the continuity of the process.

[0042] Preferably, reinforcing ribs 56 are respectively provided on the outer surfaces of the left side plate 52 and the right side plate 53. Each reinforcing rib 56 has a mounting groove 57 and is connected to the base frame 51 via bolts on the mounting groove 57. A propulsion cylinder 58 is provided on the base frame 51, and the piston rod of the propulsion cylinder 58 is connected to the back plate 54. In this embodiment, the reinforcing ribs 56 on the outer surfaces of the left side plate 52 and the right side plate 53 enhance the overall rigidity of the side plates. When packaging bags are stacked in the receiving bin 5, the side plates are prone to bending and deformation due to lateral pressure. The reinforcing ribs 56 can distribute the load through their own structure, preventing deformation of the side plates due to long-term stress and ensuring the load-bearing stability of the receiving bin 5. Simultaneously, the reinforcing ribs 56 are connected to the base frame 51 via the mounting groove 57 and bolts. Loosening the bolts allows for lateral adjustment of the side plate position along the groove, flexibly changing the lateral width of the receiving bin 5 to accommodate packaging bags of different widths, improving the versatility of the receiving bin 5 and reducing equipment changeover costs. By extending and retracting the piston rod of the propulsion cylinder 58, the back plate 54 can be moved back and forth, changing the longitudinal depth of the receiving bin 5 to accommodate the receiving needs of packaging bags of different lengths. In addition, the propulsion cylinder 58 can drive the back plate 54 to push the packaging bags forward, which can adapt to the connection needs of automated production lines and improve overall production efficiency.

[0043] Preferably, the sealing mechanism 3 includes a sliding frame 31, a sliding plate 32, a drive motor 33, a rotating arm 34, a first connecting rod 35, a second connecting rod 36, a first horizontal sealing seat 37, a second horizontal sealing seat 38, a cutting cylinder 39, and a cutter 310; the sliding frame 31 is slidably disposed within the frame 1, and the sliding plate 32 is slidably disposed within the sliding frame 31; the drive motor 33 is disposed on the frame 1, and its output end is connected to the rotating arm 34; one end of the rotating arm 34 is rotatably connected to the first connecting rod 35, and the other end is rotatably connected to the second connecting rod 36; the other end of the first connecting rod 35 is connected to the sliding frame 31. One end of the first horizontal sealing seat 37 is rotatably connected to the second horizontal sealing seat 38, which is rotatably connected to the slide plate 32. The first horizontal sealing seat 37 is disposed on the slide plate 32, and the second horizontal sealing seat 38 is disposed on the other end of the sliding frame 31. The first horizontal sealing seat 37 and the second horizontal sealing seat 38 are arranged opposite to each other. The cutter 310 is slidably disposed in the second horizontal sealing seat 38, and the first horizontal sealing seat 37 is provided with a cutting groove that cooperates with the cutter 310. The cutting cylinder 39 is disposed on the other end of the sliding frame 31, and its piston rod is connected to the cutter 310. Heating tubes are respectively provided on the first horizontal sealing seat 37 and the second horizontal sealing seat 38.

[0044] In this embodiment, during operation, the drive motor 33 starts, and its output end drives the rotating arm 34 to rotate around the motor shaft. When the rotating arm 34 rotates, it simultaneously pulls the first connecting rod 35 and the second connecting rod 36, which are hinged at both ends. The first connecting rod 35 drives the sliding frame 31 to slide along a preset trajectory within the frame 1, and the second connecting rod 36 drives the slide plate 32 to slide in the opposite direction within the sliding frame 31, so that the first horizontal sealing seat 37 on the slide plate 32 and the second horizontal sealing seat 38 at the other end of the sliding frame 31 approach each other. When the first horizontal sealing seat 37 and the second horizontal sealing seat 38 are in contact, the heating tubes on both are energized and heated, using the heat to melt and seal the area of ​​the packaging bag to be sealed. The contact state is maintained for a preset time to complete the horizontal sealing. After sealing is completed, the cutting cylinder 39 is activated, and its piston rod pushes the cutter 310 in the second horizontal sealing seat 38 to slide towards the first horizontal sealing seat 37. The cutter 310 is embedded in the knife groove on the first horizontal sealing seat 37, cutting the sealed packaging bag along the sealing edge. After the cutting is completed, the drive motor 33 drives the rotating arm 34 to reverse, and the first and second connecting rods 36 pull the sliding frame 31 and the slide plate 32 in the opposite direction, so that the first horizontal sealing seat 37 and the second horizontal sealing seat 38 move away from each other and reset; at the same time, the piston rod of the cutting cylinder 39 retracts, driving the cutter 310 back into the second horizontal sealing seat 38, waiting for the next packaging bag to enter the working area, completing one sealing and cutting cycle.

[0045] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses an inserting corner mechanism to fold the bottom sides of the packaging bag into neat corners, and a sealing mechanism to seal and cut the folded part, ensuring a firm seal and a flat cut; the shaping mechanism uses high and low push plate units to squeeze and shape the bottom, which not only allows the packaging bag to stably receive materials, but also effectively eliminates the conical shape of the bottom of the packaging bag, making the bottom flatter; in addition, the receiving bin uses gravity to further shape the bottom of the packaging bag; the various mechanisms of this utility model have a compact structure, and the multiple mechanisms work together to effectively improve packaging efficiency and enhance the processing quality of the bottom of the packaging bag.

[0046] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A bottom processing and shaping mechanism for packaging bags, characterized in that, The device includes a frame (1) and a corner insertion mechanism (2), a sealing mechanism (3), and a shaping mechanism (4) mounted on the frame; a receiving bin (5) is provided below the shaping mechanism; the corner insertion mechanism is used to fold the corners of the bag opening; the sealing mechanism is used to vertically seal and cut the bag; the shaping mechanism includes a front push plate unit and a rear push plate unit, the front push plate unit includes a first cylinder (41) and a first push plate (42), the first cylinder is connected to the frame, and the first push plate is mounted on the piston rod of the first cylinder; the rear push plate unit includes a second cylinder (43) and a second push plate (44), the second cylinder is connected to the frame, and the second push plate is mounted on the piston rod of the second cylinder; the first push plate and the second push plate are arranged opposite to each other, and the first push plate moves above the second push plate; the receiving bin is used to receive the bag after it has been processed by the sealing mechanism.

2. The packaging bag bottom processing and shaping mechanism according to claim 1, characterized in that, The first push plate has an L-shaped cross-section, including a first vertical plate (42a) and a first horizontal plate (42b). The first vertical plate is provided with a first vertical groove (42c), and a bolt is provided on the first vertical groove to connect with the first cylinder. The second push plate has an L-shaped cross-section, including a second vertical plate (44a) and a second horizontal plate (44b). The second vertical plate is provided with a second vertical groove (44c), and a bolt is provided on the second vertical groove to connect with the second cylinder. The first horizontal plate is located above the second horizontal plate.

3. The packaging bag bottom processing and shaping mechanism according to claim 1, characterized in that, The second push plate is provided with an air blowing pipe (45), one end of which is sealed and the other end is provided with an adapter (46), which is used to connect to an air source; the side wall of the air blowing pipe is provided with multiple air blowing holes (45a), which are equally spaced; the air blowing holes are oriented toward the packaging bag.

4. The packaging bag bottom processing and shaping mechanism according to claim 1, characterized in that, The corner insertion mechanism includes two corner insertion units, which are symmetrically arranged on both sides of the frame. Each corner insertion unit includes a fixed seat (21), a corner insertion cylinder (22), a transmission arm (23), an upper sliding seat (24), an upper sliding rod (25), a lower sliding seat (26), a lower sliding rod (27), a bag corner forming plate (28), and a limiting plate (29). The upper sliding seat, the fixed seat, and the lower sliding seat are sequentially arranged on the frame. The corner insertion cylinder is installed on the fixed seat, and its piston rod is connected to the transmission arm. The upper sliding rod is slidably arranged on the upper sliding seat, with one end connected to the transmission arm and the other end connected to the bag corner forming plate. The lower sliding rod is slidably arranged on the lower sliding seat, with one end connected to the transmission arm and the other end connected to the limiting plate.

5. The packaging bag bottom processing and shaping mechanism according to claim 4, characterized in that, The corner forming plate includes a straight plate (28a) and an inclined plate (28b), the inclined plate being a triangular structure; the straight plate and the inclined plate are set at an angle; a connecting block (210) is provided on the back of the corner forming plate, the connecting block being provided with a connecting rod (211), the connecting rod being connected to the upper sliding rod; the connecting block is provided with a horizontal sliding groove (210a) and a horizontal locking groove (210b), a hexagonal nut (212) being engaged in the horizontal locking groove; the straight plate is provided with a longitudinal sliding groove (28c), the longitudinal sliding groove being provided with a fastening screw (213) cooperating with the hexagonal nut, the fastening screw cooperating with the hexagonal nut connecting the straight plate to the connecting block.

6. The packaging bag bottom processing and shaping mechanism according to claim 1, characterized in that, The receiving hopper includes a base frame (51), on which a left side plate (52), a right side plate (53) and a back plate (54) are provided. The top of the left side plate, the right side plate and the back plate are all provided with guide ramps (55) to facilitate the entry of packaging bags.

7. The packaging bag bottom processing and shaping mechanism according to claim 6, characterized in that, The outer surfaces of the left and right side plates are respectively provided with reinforcing ribs (56), and the reinforcing ribs are provided with mounting grooves (57), and are connected to the base frame by bolts on the mounting grooves; the base frame is provided with a propulsion cylinder (58), and the piston rod of the propulsion cylinder is connected to the back plate.

8. The packaging bag bottom processing and shaping mechanism according to claim 1, characterized in that, The sealing mechanism includes a sliding frame (31), a sliding plate (32), a drive motor (33), a rotating arm (34), a first connecting rod (35), a second connecting rod (36), a first horizontal sealing seat (37), a second horizontal sealing seat (38), a cutting cylinder (39), and a cutter (310); the sliding frame is slidably disposed within the frame, and the sliding plate is slidably disposed within the sliding frame; the drive motor is disposed on the frame, and its output end is connected to the rotating arm; one end of the rotating arm is rotatably connected to the first connecting rod, and the other end is rotatably connected to the second connecting rod; The other end of the first connecting rod is rotatably connected to one end of the sliding frame; the other end of the second connecting rod is rotatably connected to the sliding plate; the first horizontal sealing seat is disposed on the sliding plate, and the second horizontal sealing seat is disposed at the other end of the sliding frame; the first horizontal sealing seat and the second horizontal sealing seat are arranged opposite to each other; the cutter is slidably disposed in the second horizontal sealing seat, and the first horizontal sealing seat is provided with a cutting groove that cooperates with the cutter; the cutting cylinder is disposed on the other end of the sliding frame, and its piston rod is connected to the cutter; the first horizontal sealing seat and the second horizontal sealing seat are respectively provided with heating tubes.

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