A high-efficiency stable pusher bag feeding device and a method of using the same

Abstract

The present application relates to the technical field of vacuum packaging, in particular to a high-efficiency and stable flat push type bag feeding device and a using method thereof, which comprises a frame body, a placing groove is formed in the middle of the frame body; a fixing frame is arranged at the upper side of the frame body and elastically connected with the frame body, and two opening supporting mechanisms are symmetrically arranged at the lower side of the fixing frame; two moving frames are symmetrically arranged in the placing groove, two parallel inclined grooves are formed in the top surface of the moving frame; and an opening mechanism is arranged to open the opening of the packaging bag. Through the opening mechanism, the opening of the packaging bag can be automatically opened, and the opening supporting mechanism can be matched to ensure the stability of the opening and fix the packaging bag during the bagging process, and efficient sealing can be realized after the bagging is completed, thereby improving the packaging efficiency.

Description

Technical Field

[0001] This invention relates to the field of vacuum packaging technology, specifically to a highly efficient and stable flat-push bag feeding device and its usage method. Background Technology

[0002] Vacuum packaging is a common packaging method today. It requires putting the items to be packaged into a packaging bag and then vacuuming the bag to achieve the packaging of the goods.

[0003] In the existing packaging process, the opening of the packaging bag usually needs to be opened by manually kneading it, and the bag opening is opened by a bag-holding mechanism to put the item to be packaged in. After the item is put in, the opening of the packaging bag needs to be manually fixed to the air extraction port of the vacuum pump, and the vacuum pump is used to achieve a vacuuming operation inside the packaging bag. In the above packaging process, the manual opening and tightening of the packaging bag results in low actual packaging efficiency. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a highly efficient and stable flat-push bag feeding device and its usage method. This effectively solves the problem that in existing packaging processes, the opening of the packaging bag typically requires manual kneading to open, and a bag-supporting mechanism is used to open the bag opening before placing the item to be packaged inside. After placing the item, the bag opening needs to be manually fixed to the vacuum pump's suction port to achieve vacuuming inside the bag. The manual opening and tightening of the packaging bag in these processes results in low actual packaging efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a highly efficient and stable flat-push bag feeding device, comprising:

[0007] The frame has a placement slot in the middle.

[0008] A fixed frame is set on the upper side of the frame and is elastically connected to the frame. A feeding frame is movably connected to the middle of the fixed frame. Flat tubes are movably connected to both sides of the feeding frame on the upper part of the fixed frame. Two opening support mechanisms are symmetrically set on the lower side of the fixed frame for opening the bag.

[0009] And two movable frames symmetrically arranged in the placement slot, with two parallel inclined slots on the top surface of the movable frames, and sealing strips fixedly installed on the inner wall of the movable frames;

[0010] The package includes an opening mechanism for opening the packaging bag, comprising a movable plate mounted on the upper side of a movable frame, an adsorption groove inside the movable plate, and snap-fit ​​grooves on both sides of the adsorption groove. The movable plate slides into a limiting groove on the movable frame via a connecting plate. Displacement plates are movably connected to both ends of the movable plate. Adsorption holes are opened inside the displacement plates. Both the adsorption holes and the adsorption groove are connected to the output end of an external vacuum pump. A stop rod is fixedly installed at the lower end of the displacement plate. The lower end of the stop rod extends into the inclined groove. When the two movable plates move in a horizontally offset direction, the two displacement plates are restricted by the inclined groove and move away from each other, opening the packaging bag.

[0011] Furthermore, the fixed frame is movably connected to the frame body in the vertical direction, and can reciprocate in the vertical direction under the action of the external drive mechanism; the two movable frames are movably connected to the frame body in the horizontal direction, and can adjust the position of the two movable frames relative to the frame body in the horizontal direction under the action of the external hydraulic cylinder, so that the inner walls of the two movable frames are in two states of being in contact or not in contact.

[0012] Furthermore, the inner wall of the inclined groove and the outer wall of the abutment rod maintain a sliding fit relationship; and the two inclined grooves located on the same moving frame are set in a parallel state, and when the two moving plates move towards each other under the action of the external cylinder while keeping their inner end faces in contact, the displacement plates located on different moving frames move away from each other.

[0013] Furthermore, movable slots are provided at both ends of the movable plate, and overlapping plates fixedly installed on the outer wall of the displacement plate are slidably connected inside the movable slots; the outer wall of the overlapping plate is connected to the inner wall of the movable slot through an elastic element, and a piston rod is also fixedly installed on the overlapping plate. The piston rod maintains a sliding fit with the piston tube fixedly installed on the movable frame; when the movable plate moves along the wall of the limiting slot under the action of the external cylinder, the two displacement plates located on the same movable plate will adjust their positions relative to the movable plate under the action of the inclined slot, and the piston rod will adjust its position relative to the piston tube.

[0014] Furthermore, the opening mechanism includes symmetrically arranged movable blocks on the bottom surface of the fixed frame. The lower outer wall of each movable block has an inclined surface, and the interior of each movable block has a cavity. Electromagnetic suction rings are fixedly installed on the inner walls of the two closest cavities. The mechanism also includes a circular tube inserted between the middle of the two movable blocks. Magnetic suction cups are fixedly installed at the ends of the circular tube. When the electromagnetic suction rings are energized, they maintain magnetic attraction with the magnetic suction cups. An air outlet is also provided, which is opened through the magnetic suction cups and communicates with the interior of the circular tube. A vertical tube is fixedly installed on the circular tube and communicates with its interior. The vertical tube communicates with the interior of the piston tube through a connecting tube fixedly installed on the fixed frame, and a control valve is installed on the connecting tube. When the piston rod is adjusted relative to the piston tube, the gas in the piston tube will enter the cavity through the circular tube and the air outlet, causing the two movable blocks movably connected to the fixed frame to move away from each other, thus opening the packaging bag.

[0015] Furthermore, it also includes friction strips disposed on the outer wall of the movable plate; when the two movable plates are attached, the friction strips located on the outer walls of the different movable plates can make close contact with the outer wall of the packaging bag located in the middle of the two movable plates; and when the two movable plates are attached, the inner wall of the snap-fit ​​groove located on the different movable plates can make close contact with the outer wall of the flat tube.

[0016] A method for using a high-efficiency and stable flat-push bag feeding device includes the following steps:

[0017] S1: Place the opening of the packaging bag between the middle of the two moving plates, leaving a 2-3mm gap at the top of the moving plates. Adjust the position of the two moving plates under the action of the external hydraulic cylinder so that the two moving plates can clamp the packaging bag.

[0018] S2: After clamping, the external vacuum pump is used to adsorb the packaging bag. Under the action of the external cylinder, the two moving plates are pushed horizontally, so that the two moving plates move towards each other. Under the action of the inclined groove, the two displacement plates located on different moving plates move away from each other. Combined with the relationship between the displacement plates adsorbing the packaging bag through the adsorption hole, the upper opening of the packaging bag will be opened.

[0019] S3: The external drive mechanism moves the fixed frame downward, and at the same time, the control valve on the connecting pipe is opened, allowing the gas in the piston tube to enter the cavity, causing the two movable blocks to extend to the opening of the packaging bag and open the bag opening. After opening, the position of the two movable frames is adjusted by the external hydraulic cylinder, so that the inner walls of the two movable frames are in a non-adherent state; at this time, the feeding frame is used for feeding.

[0020] S4: After feeding is completed, move the flat tube down into the packaging bag, then re-fit the inner walls of the two moving frames, use the external wall vacuum pump to extract the gas inside the packaging bag, and seal the packaging bag with the sealing strip after the vacuuming is completed.

[0021] Beneficial effects

[0022] The technical solution provided by this invention has the following advantages compared with known public technologies:

[0023] This invention features an opening mechanism that automatically opens the packaging bag, and a supporting mechanism that ensures the stability of the opening and secures the bag during the filling process. Furthermore, it enables efficient sealing after filling, thus improving packaging efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the bag-feeding device of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall exploded structure of the bag-feeding device of the present invention;

[0027] Figure 3 This is an exploded view of the fixed frame, the movable plate, and the movable frame of the present invention.

[0028] Figure 4 This is a schematic diagram of the exploded structure at the fixing frame of the present invention;

[0029] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0030] Figure 6 This is a schematic cross-sectional view of the movable block of the present invention;

[0031] Figure 7 This is a schematic diagram of the exploded structure of the mobile frame of the present invention;

[0032] Figure 8 This is a schematic diagram of the exploded structure at the movable plate of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure when the moving plate and the displacement plate of the present invention are separated.

[0034] Attached Figure

[0035] 100. Frame; 101. Placement slot;

[0036] 200. Fixed frame; 201. Connecting pipe; 210. Feed frame; 220. Flat pipe; 230. Movable block; 231. Inclined surface; 232. Cavity; 233. Electromagnetic suction ring; 240. Round pipe; 241. Magnetic suction cup; 242. Air outlet; 250. Vertical pipe;

[0037] 300, Moving plate; 301, Adsorption groove; 302, Snap-fit ​​groove; 303, Connecting plate; 304, Movable groove; 305, Friction strip; 310, Displacement plate; 311, Adsorption hole; 312, Overlap plate; 313, Elastic element; 320, Piston rod; 330, Abutting rod;

[0038] 400, movable frame; 401, limiting groove; 402, tilting groove; 410, sealing strip; 420, piston tube. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] The present invention will be further described below with reference to embodiments.

[0041] Example:

[0042] A highly efficient and stable flat-push bag feeding device includes:

[0043] The frame 100 has a placement slot 101 in the middle. In this case, the placement slot 101 is used to provide a certain support for the packaging bag containing the goods. During the sealing process of the packaging bag, the packaging bag is inside the placement slot 101. It is worth noting that in this case, in order to feed the bag, a movable clamping plate can be set on the frame 100. The clamping plate moves back and forth in the horizontal direction and can extend into the placement slot 101 to realize automatic feeding. This is not shown in the attached drawings and can be understood as prior art in this case.

[0044] In this case, a fixed frame 200 is also included, which is located on the upper side of the frame 100 and is elastically connected to the frame 100. A feed frame 210 is movably connected to the middle of the fixed frame 200. Flat tubes 220 are movably connected to both sides of the feed frame 210 on the upper side of the fixed frame 200. Two opening mechanisms are symmetrically arranged on the lower side of the fixed frame 200 for opening the bag. Specifically, the fixed frame 200 is located at the upper opening of the frame 100. In the vertical direction, its position relative to the frame 100 can be adjusted. By adjusting the height of the opening mechanism on its upper side, the opening mechanism can be moved from the position above the opening of the packaging bag to the inside of the packaging bag, ultimately opening the packaging bag. Furthermore, a feeding frame 210 is movably connected to the fixed frame 200. The feeding frame 210 can be adjusted in position in the vertical direction relative to the fixed frame 200. When the feeding frame 210 moves downward, its lower outlet can extend into the inside of the packaging bag, thereby further enabling the injection of goods. In this case, the goods can fall into the packaging bag by their own weight. As mentioned above, the placement slot 101 opened in the frame 100 in this case can effectively support the packaging bag. Therefore, when the packaging bag contains goods, it can still effectively support the packaging bag. The fixed frame 200 is movably connected to the frame 100 in the vertical direction. Under the action of the external drive mechanism, the fixed frame 200 can reciprocate in the vertical direction.

[0045] The package includes two symmetrically arranged movable frames 400 within the placement slot 101. Each movable frame 400 has two parallel inclined slots 402 on its top surface, and a sealing strip 410 is fixedly installed on its inner wall. An opening mechanism for opening the packaging bag includes a movable plate 300 positioned on the upper side of the movable frame 400. The movable plate 300 has an adsorption slot 301 inside, and snap-fit ​​slots 302 on both sides of the adsorption slot 301. The movable plate 300 is connected to the movable frame 400 via a connecting plate 303. The limiting groove 401 is slidably engaged, and the two ends of the movable plate 300 are respectively movably connected to the displacement plate 310. The displacement plate 310 has an adsorption hole 311 inside. The adsorption hole 311 and the adsorption groove 301 are both connected to the output end of the external vacuum pump. The lower end of the displacement plate 310 is fixedly installed with an abutment rod 330. The lower end of the abutment rod 330 extends into the inclined groove 402. When the two movable plates 300 move in a horizontally offset direction, the two displacement plates 310 are restricted by the inclined groove 402 and move away from each other, opening the opening of the packaging bag.

[0046] Furthermore, before the goods are bagged, the packaging bag needs to be opened automatically. In this case, an opening mechanism is provided. Before opening, the packaging bag needs to be effectively clamped. In this case, two movable frames 400 are movably connected to the frame 100 in the horizontal direction. Under the action of an external hydraulic cylinder, the position of the two movable frames 400 can be adjusted relative to the frame 100 in the horizontal direction, so that the inner walls of the two movable frames 400 are in two states of being in contact or not in contact. Before opening the packaging bag, the inner walls of the two movable frames 400 need to be kept in contact by using an external hydraulic cylinder. It should be noted that in the moving direction of the movable frame 400, the movable frame 400 and the movable plate 300 maintain a relatively fixed relationship. That is, when the inner walls of the two movable frames 400 are in contact, the movable plates 300, which are slidably connected to the movable frame 400, also maintain an inner end face contact relationship, thereby achieving effective fixation of the packaging bag.

[0047] The opening steps of the packaging bag are as follows: First, place the packaging bag between the middle of the two moving plates 300, and ensure that the distance between the upper edge of the packaging bag and the top surface of the moving plate 300 is not less than 2mm. First, use an external vacuum pump to effectively adsorb the outer walls on both sides of the packaging bag by using the adsorption groove 301 on the moving plate 300 and the adsorption hole 311 on the displacement plate 310. In this case, the adsorption groove 301 and the adsorption hole 311 on both sides of the packaging bag can adsorb the packaging bag well. After the adsorption of the packaging bag is completed, use a driving device to drive the connecting plate 303 to slide in the limiting groove 401. It should be noted that the direction of the limiting groove 401 on the moving frame 400 is parallel to the end face of the two moving plates 300. When the connecting plate 303 moves towards each other in the limiting groove 401, the two moving plates 300 still maintain an overlapping relationship, which can still ensure the fixation of the packaging bag.

[0048] The inner wall of the inclined groove 402 and the outer wall of the abutment rod 330 maintain a sliding fit relationship; and the two inclined grooves 402 located on the same movable frame 400 are arranged in a parallel state. When the two movable plates 300 keep their inner end faces in contact, when the external cylinder drives the connecting plate 303 and the movable plate 300 to move towards each other, the displacement plates 310 located on different movable frames 400 will move away from each other.

[0049] Specifically, when the two moving plates 300 move relative to each other, the moving plates 300 and the displacement plate 310 maintain a relatively fixed relationship in their direction of movement. For ease of description, the direction of relative movement of the moving plates 300 is defined as the lateral direction, and the direction of movement of the corresponding moving frame 400 in the external hydraulic cylinder is the longitudinal direction. When the moving plates 300 move laterally, it is regarded as a misaligned pushing action. The displacement plate 310 will also maintain the same lateral movement as the moving plates 300. However, the lower end of the displacement plate 310 is fixedly installed with an abutment rod 330. The lower end of the abutment rod 330 extends into the interior of the inclined groove 402. When the abutment rod 330 slides in the inclined groove 402, when it is displaced laterally, it will also be displaced longitudinally. The longitudinal displacement can achieve the opening of the packaging bag.

[0050] It should be noted that during the above process, both the adsorption tank 301 and the adsorption hole 311 maintain effective adsorption of the packaging bag. When the displacement plate 310 moves longitudinally, the displacement plates 310 located on different moving plates 300 will move away from each other, thereby opening the packaging bag.

[0051] As described above, the opening mechanism provided in this case can open the bag opening. Furthermore, this case also includes friction strips 305 disposed on the outer wall of the movable plate 300. When the two movable plates 300 are in contact, the friction strips 305 located on the outer walls of the different movable plates 300 can make close contact with the outer wall of the bag located in the middle of the two movable plates 300. The friction strips 305 can ensure that when the two movable plates 300 undergo lateral relative displacement, the bag will not slide relative to the movable plates 300, better replacing manual rubbing, and the rubbing effect is more obvious, ensuring that each bag can be opened on both sides of its opening through this method.

[0052] The opening mechanism described above can open the packaging bag. In the actual packaging process, since the goods to be put into the packaging bag have a certain weight, when they fall into the packaging bag from the feed box 210, the adsorption effect of the adsorption groove 301 and the adsorption hole 311 alone is not enough to effectively fix the opening position at the top of the packaging bag. Therefore, in this case, a mouth-supporting mechanism is also provided.

[0053] Before describing the specific working method of the opening mechanism, the changes brought about by the opening mechanism need to be explained here. Specifically, movable slots 304 are provided at both ends of the movable plate 300. The overlapping plate 312, which is fixedly installed on the outer wall of the displacement plate 310, is slidably connected inside the movable slot 304. The outer wall of the overlapping plate 312 is connected to the inner wall of the movable slot 304 through the elastic element 313. A piston rod 320 is also fixedly installed on the overlapping plate 312. The piston rod 320 and the piston tube 420, which is fixedly installed on the movable frame 400, maintain a sliding fit relationship. When the movable plate 300 moves along the groove wall of the limiting slot 401 under the action of the external cylinder, the two displacement plates 310 located on the same movable plate 300 will adjust their positions relative to the movable plate 300 under the action of the inclined slot 402, and the piston rod 320 will adjust its position relative to the piston tube 420.

[0054] It is worth noting that, as mentioned above, when the openings on both sides of the upper end of the packaging bag are opened by the displacement plate 310, the displacement plate 310 is displaced relative to the moving plate 300 in the longitudinal direction. Since the moving plate 300 and the moving frame 400 are fixed in the transverse direction, the displacement plate 310 is also displaced relative to the moving frame 400 in the longitudinal direction. It should be noted that, in this case, a piston rod 320 is fixedly installed on the displacement plate 310, and a piston tube 420 is fixedly installed on the moving frame 400. The piston rod 320 extends into the piston tube 420 and is slidably connected to it. When the relative position of the displacement plate 310 and the moving frame 400 changes, the piston rod 320 will adjust its position relative to the piston tube 420, thereby pressurizing the gas located in the piston tube 420.

[0055] The support mechanism includes movable blocks 230 symmetrically arranged on the bottom surface of the fixed frame 200. The lower outer wall of each movable block 230 has an inclined surface 231, and the interior of each movable block 230 has a cavity 232. Electromagnetic suction rings 233 are fixedly installed on the inner walls of the two closest cavities 232. It also includes a circular tube 240 inserted between the middle parts of the two movable blocks 230. Magnetic suction cups 241 are fixedly installed at the ends of each circular tube 240. When energized, the electromagnetic suction rings 233 maintain magnetic attraction with the magnetic suction cups 241. The mechanism also includes a device that passes through the magnetic suction cups 241 and maintains communication with the interior of the circular tube 240. The air outlet 242; and a vertical pipe 250 fixedly installed on the round pipe 240 and kept in communication with its interior, the vertical pipe 250 being kept in communication with the interior of the piston pipe 420 through a connecting pipe 201 fixedly installed on the fixing frame 200, and a control valve being installed on the connecting pipe 201; when the piston rod 320 is adjusted relative to the piston pipe 420, the gas in the piston pipe 420 will enter the cavity 232 through the round pipe 240 and from the air outlet 242, causing the two movable blocks 230 movably connected to the fixing frame 200 to move away from each other, thereby opening the packaging bag.

[0056] The working principle of the support mechanism is as follows: When the gas in the piston tube 420 is pressurized, and the piston tube 420 is connected to the cavity 232 via the connecting pipe 201, the gas enters the cavity 232 when the control valve on the connecting pipe 201 is opened. It should be noted that the two magnetic chucks 241 fixedly installed at the end of the round tube 240 have lateral cross-sectional dimensions that match the dimensions of the cavity 232. When gas overflows from the outlet 242 into the cavity 232, it drives the movable actuator connected to the fixed frame 200. The movable block 230 moves, and the two movable blocks 230 on the same side move away from each other longitudinally. It is worth noting that before opening the control valve, the fixed frame 200 is moved downward by the external drive mechanism, so that the movable block 230 can be extended into the inside of the packaging bag. After the two movable blocks 230 move away from each other, the packaging bag can be effectively opened. Afterward, the two movable frames 400 are in a non-adherent state, ensuring that the goods falling from the lower outlet of the feed frame 210 can stably fall into the inside of the packaging bag for bagging.

[0057] Furthermore, in order to ensure that the movable block 230 effectively fixes the packaging bag during the bagging process, in this case, the electromagnetic suction ring 233 set in the cavity 232 can be energized to keep it magnetically attracted to the magnetic suction cup 241, thereby ensuring the fixation of the positions of the two movable blocks 230. Thus, after the bagging is completed, the electromagnetic suction ring 233 is first de-energized, and then the two moving plates 300 are reset. At this time, the two movable blocks 230 will move closer together again, and the fixing frame 200 will move upward.

[0058] After the goods are bagged, the lower end of the flat tube 220 extends to the middle of the two moving plates 300. When the two moving plates 300 are attached, the inner wall of the snap-fit ​​groove 302 on the different moving plates 300 can fit tightly with the outer wall of the flat tube 220. Then, the two moving frames 400 are reattached. The gas inside the packaging bag is extracted through the flat tube 220 by an external vacuum mechanism. It should be noted that the two moving frames 400 in the reattached state can effectively prevent the goods from blocking the lower end outlet of the flat tube 220 when it is in use. After the vacuum is completed inside the packaging bag, the packaging bag is sealed by the sealing strip 410 set on the moving frame 400. Specifically, thermoplastic sealing can be used.

[0059] A method for using a high-efficiency and stable flat-push bag feeding device includes the following steps:

[0060] S1: Place the opening of the packaging bag between the middle of the two moving plates 300, and leave 2-3mm at the top of the moving plates 300. Adjust the position of the two moving frames 400 under the action of the external hydraulic cylinder so that the two moving plates 300 can clamp the packaging bag.

[0061] S2: After clamping, the external vacuum pump is used to adsorb the packaging bag. Under the action of the external cylinder, the two moving plates 300 are pushed horizontally, so that the two moving plates 300 move towards each other. Under the action of the inclined groove 402, the two displacement plates 310 located on different moving plates 300 move away from each other. Combined with the relationship that the displacement plates 310 adsorb the packaging bag through the adsorption hole 311, the upper opening of the packaging bag will be opened.

[0062] S3: The external drive mechanism moves the fixed frame 200 downward, and at the same time, the control valve on the connecting pipe 201 is opened, so that the gas in the piston pipe 420 enters the cavity 232, causing the two movable blocks 230 to extend to the opening of the packaging bag and open the bag opening. After opening, the position of the two movable frames 400 is adjusted by the external hydraulic cylinder, so that the inner walls of the two movable frames 400 are in a non-adherent state; at this time, the feeding frame 210 is used for feeding.

[0063] S4: After feeding is completed, the flat tube 220 is lowered into the packaging bag, and then the inner walls of the two moving frames 400 are re-adhered. The gas inside the packaging bag is extracted using the external wall vacuum pump. After the gas extraction is completed, the packaging bag is sealed using the sealing strip 410.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A highly efficient and stable flat-push bag feeding device, characterized in that, include: The frame (100) has a placement slot (101) in the middle. A fixed frame (200) is located on the upper side of the frame (100) and is elastically connected to the frame (100). A feed frame (210) is movably connected to the middle of the fixed frame (200). Flat tubes (220) are movably connected to both sides of the feed frame (210) on the fixed frame (200). Two opening support mechanisms are symmetrically arranged on the lower side of the fixed frame (200) for opening the bag. Two movable frames (400) are symmetrically arranged in the placement slot (101). Two parallel inclined slots (402) are opened on the top surface of the movable frame (400), and a sealing strip (410) is fixedly installed on the inner wall of the movable frame (400). The opening mechanism is used to open the opening of the packaging bag, including a movable plate (300) set on the upper side of the movable frame (400), an adsorption groove (301) is provided inside the movable plate (300), and snap-fit ​​grooves (302) are provided on both sides of the adsorption groove (301). The movable plate (300) slides with the limiting groove (401) provided on the movable frame (400) through the connecting plate (303). Displacement plates (310) are movably connected to both ends of the movable plate (300). The displacement plate (310) has an adsorption hole (311) inside. The adsorption hole (311) and the adsorption groove (301) are both connected to the output end of the external vacuum pump. The lower end of the displacement plate (310) is fixedly installed with a contact rod (330). The lower end of the contact rod (330) extends into the inclined groove (402). When the two moving plates (300) move in a horizontally offset direction, the two displacement plates (310) are restricted by the inclined groove (402) and move away from each other to open the opening of the packaging bag.

2. The efficient and stable flat-push bag feeding device according to claim 1, characterized in that, The fixed frame (200) is movably connected to the frame (100) in the vertical direction, and the fixed frame (200) can reciprocate in the vertical direction under the action of the external drive mechanism; The two movable frames (400) are movably connected to the frame (100) in the horizontal direction. Under the action of the external hydraulic cylinder, the position of the two movable frames (400) can be adjusted relative to the frame (100) in the horizontal direction, so that the inner walls of the two movable frames (400) are in two states of being in contact or not in contact.

3. The efficient and stable flat-push bag feeding device according to claim 2, characterized in that, The inner wall of the inclined groove (402) and the outer wall of the abutment rod (330) maintain a sliding fit relationship; Furthermore, the two inclined slots (402) located on the same movable frame (400) are arranged in a parallel state, and when the two movable plates (300) move towards each other under the action of the external cylinder while keeping their inner end faces in contact, the displacement plates (310) located on different movable frames (400) move away from each other.

4. The efficient and stable flat-push bag feeding device according to claim 3, characterized in that, Movable slots (304) are provided at both ends of the movable plate (300), and the overlapping plate (312) fixedly installed on the outer wall of the displacement plate (310) is slidably connected inside the movable slot (304); The outer wall of the lap plate (312) is connected to the inner wall of the movable groove (304) through the elastic element (313), and a piston rod (320) is fixedly installed on the lap plate (312). The piston rod (320) and the piston tube (420) fixedly installed on the movable frame (400) maintain a sliding fit relationship. When the moving plate (300) moves along the wall of the limiting groove (401) under the action of the external cylinder, the two displacement plates (310) located on the same moving plate (300) will adjust their positions relative to the moving plate (300) under the action of the inclined groove (402), and cause the piston rod (320) to adjust its position relative to the piston tube (420).

5. The efficient and stable flat-push bag feeding device according to claim 1, characterized in that, The support mechanism includes movable blocks (230) symmetrically arranged on the bottom surface of the fixed frame (200). The lower outer wall of the movable block (230) is provided with a slope (231). The interior of the movable block (230) is provided with a cavity (232). An electromagnetic suction ring (233) is fixedly installed on the inner wall of the two cavities (232) that are closest to each other. It also includes a round tube (240) inserted between the middle of the two movable blocks (230), with a magnetic chuck (241) fixedly installed at the end of the round tube (240). When the electromagnetic chuck (233) is energized, it maintains magnetic attraction with the magnetic chuck (241), and an air outlet (242) that runs through the magnetic chuck (241) and is connected to the inside of the round tube (240). And a vertical pipe (250) fixedly installed on the round pipe (240) and kept in communication with its interior, the vertical pipe (250) being kept in communication with the piston pipe (420) through a connecting pipe (201) fixedly installed on the fixing frame (200), and a control valve being installed on the connecting pipe (201); When the piston rod (320) is positioned relative to the piston tube (420), the gas in the piston tube (420) will pass through the round tube (240) and enter the cavity (232) through the air outlet (242), causing the two movable blocks (230) connected to the fixed frame (200) to move away from each other, thereby opening the packaging bag.

6. The efficient and stable flat-push bag feeding device according to claim 5, characterized in that, Also includes: Friction strips (305) are provided on the outer wall of the movable plate (300); When the two movable plates (300) are attached, the friction strips (305) located on the outer walls of the different movable plates (300) can make close contact with the outer wall of the packaging bag located in the middle of the two movable plates (300); Furthermore, when the two movable plates (300) are attached, the inner wall of the snap-fit ​​groove (302) located on the different movable plates (300) can be tightly attached to the outer wall of the flat tube (220).

7. A method of using a high-efficiency and stable flat-push bag feeding device, applied to the high-efficiency and stable flat-push bag feeding device as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Place the opening of the packaging bag between the middle of the two moving plates (300) and leave 2-3mm at the upper end of the moving plates (300). Adjust the position of the two moving frames (400) under the action of the external hydraulic cylinder so that the two moving plates (300) can clamp the packaging bag. S2: After clamping, the packaging bag is adsorbed by an external vacuum pump. Under the action of an external cylinder, the two moving plates (300) are pushed horizontally, so that the two moving plates (300) move towards each other. Under the action of the inclined groove (402), the two displacement plates (310) located on different moving plates (300) move away from each other. Combined with the relationship between the displacement plates (310) adsorbing the packaging bag through the adsorption hole (311), the upper opening of the packaging bag will be opened. S3: The external drive mechanism drives the fixed frame (200) to move down, and the opening mechanism extends to the opening of the packaging bag and opens the bag opening. After opening, the external hydraulic cylinder is used to adjust the position of the two moving frames (400) so that the inner walls of the two moving frames (400) are in a non-adherent state. At this time, the feeding frame (210) is used for feeding. S4: After feeding is completed, the flat tube (220) is lowered into the packaging bag, and then the inner walls of the two moving frames (400) are re-attached. The gas inside the packaging bag is extracted using a vacuum pump. After the gas extraction is completed, the packaging bag is sealed using a sealing strip (410).

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