Vacuumizing device of bag feeding type packaging machine

Abstract

The utility model relates to the technical field of packaging machines, in particular to a vacuumizing device of a bag feeding type packaging machine, which comprises two vacuumizing assemblies arranged side by side and a transfer assembly, each vacuumizing assembly comprises a movable plate and a fixed plate which are oppositely arranged, and the movable plate is provided with a die assembly for driving the movable plate to move towards the fixed plate. The movable plate and the fixed plate are closed to form vacuum cavities, a vacuumizing hole is formed in the fixed plate, a bag clamping assembly and a sealing assembly are arranged on the fixed plate, a bag supporting assembly is arranged on the movable plate, and the transferring assembly comprises a first driving mechanism for driving a packaging bag to move between the two vacuum cavities. The first driving mechanism is provided with two second driving mechanisms for transferring the packaging bags from the previous station to the vacuumizing station, the second driving mechanisms are provided with third driving mechanisms for clamping the packaging bags and driving the packaging bags to ascend and descend, and the double-cavity vacuum packaging machine has the advantages that alternate operation of the two vacuum cavities is achieved, continuous work is achieved, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, specifically to a vacuum device for a bag packaging machine. Background Technology

[0002] Pre-pack vacuum packaging machines, as an automated packaging equipment, are widely used in material packaging in various fields such as food, medicine, and daily chemicals.

[0003] Existing pre-filled bag vacuum packaging machines are mostly of the following two types: 1. The double-bag vacuum machine disclosed in patent application number CN202520607125.4, which includes a vacuum disc evenly distributed around the circumference installed on the edge of the turntable, and sends the filled packaging bag into the vacuum disc for vacuuming; 2. The pre-filled bag packaging machine with a conduit-type vacuuming component disclosed in patent application number CN201320454669.9, which includes a column standing on the frame and a vacuum tube installed on the column. After the pre-filled bag packaging machine passes through the unloading station, the machine moves to the vacuuming station. At this time, the vacuum tube is inserted into the bag under the action of the cylinder. Then the machine clamp pulls it outward to straighten the bag opening. Then the machine issues a vacuuming command and the vacuum tube starts to pump air until the gas in the bag is completely pumped out. Finally, the cylinder rises and drives the vacuum tube to rise and pull out the bag.

[0004] However, the above two vacuum devices have the following drawbacks in actual use: 1. The rotary vacuum device disclosed in the first patent document requires an additional rotary table, on which multiple vacuum discs are evenly distributed. The increased number of vacuum discs increases the failure rate, and if one of them fails, all discs need to be inspected to detect the problem; 2. The conduit vacuum device disclosed in the second patent document is set on the vacuum station of the machine frame. If the packaging bag is large, the equipment needs to be paused during vacuuming, resulting in low production efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a vacuum device for a bag packaging machine that addresses the shortcomings of the prior art, enabling two vacuum chambers to operate alternately. When one chamber is operating, the other chamber can receive new packaging bags without stopping the machine, thus achieving continuous operation and improving production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vacuuming device for a bag packaging machine, comprising two vacuuming components arranged side by side and a conveying component for transporting packaging bags. The vacuuming components include a movable plate and a fixed plate arranged opposite to each other. The movable plate has a mold closing component on its side facing away from the fixed plate, which drives it to move toward the fixed plate. After the movable plate and the fixed plate are closed, a vacuum chamber is formed. The movable plate has a vacuuming hole. The fixed plate has a bag clamping component for clamping the packaging bag and a sealing component for sealing the packaging bag. The movable plate has a bag supporting component. The conveying component includes a crossbeam erected between the two vacuuming components. The crossbeam has a first driving mechanism for driving the packaging bag to move between the two vacuum chambers. The first driving mechanism has two second driving mechanisms for conveying the packaging bag from the previous working position to the vacuuming position. The second driving mechanism has a third driving mechanism for clamping the packaging bag and driving it to rise and fall.

[0007] The present invention, which has the above-mentioned features, uses two parallel vacuum pumping devices in conjunction with a transfer assembly to enable two vacuum chambers to operate alternately. When one chamber is operating, the other chamber can receive new packaging bags without stopping the machine to wait, thus achieving continuous operation and improving production efficiency.

[0008] A further feature of this invention is that the mold-closing assembly includes a first guide rod and guide sleeve assembly disposed on a vertical surface outside the moving plate, a second guide rod and guide sleeve assembly disposed at the bottom of the moving plate, and a mold-closing cylinder. The first guide rod and guide sleeve assembly is located at the upper part of the vertical surface, and the second guide rod and guide sleeve assembly is located at the bottom near another vacuum assembly. The first guide rod of the first guide rod and guide sleeve assembly and the second guide rod of the second guide rod and guide sleeve assembly both extend to connect with a fixed plate. A synchronization plate is provided at the end of the first guide rod and the second guide rod away from the fixed plate. The output end of the mold-closing cylinder is connected to the moving plate, and the mold-closing cylinder is fixed on the synchronization plate.

[0009] The present invention, which has the above features, uses only a double guide rod and guide sleeve assembly to form two-point support, and ensures that the double guide rods extend and retract synchronously through a synchronous plate, so as to ensure that the moving plate does not deviate or shake when it moves.

[0010] A further feature of this invention is that a support assembly for supporting the first guide rod and the second guide rod is provided between the two vacuuming components. The support assembly includes a vertical plate connected to the first guide rod and a guide rod seat connected to the second guide rod. A horizontal plate is provided between the lower ends of the two vertical plates. A triangular plate is provided between the horizontal plate and the vertical plate and fixedly connected to both. A connecting plate is provided between the guide rod seat and the horizontal plate and fixedly connected to both.

[0011] The present invention, which has the above features, forms a stable triangular structure through vertical plates, horizontal plates, and triangular plates, thereby enhancing the rigidity of the support component; the support component is a modular structure and is detachably connected to the guide rod. If the support component or the guide rod and guide sleeve assembly malfunctions, it can be disassembled and replaced separately, facilitating later maintenance.

[0012] A further feature of this invention is that a guide member is provided on the side of the fixed plate near the first driving mechanism. The guide member includes a first surface that is attached to and connected to the side of the fixed plate, a second surface that is perpendicularly connected to the first surface, and a third surface that is connected to the second surface. The second surface is parallel to the moving plate, and the third surface is inclined toward the side away from the moving plate. The first surface, the second surface, and the third surface are all bent.

[0013] The present invention, which has the above-mentioned features, guides the packaging bag to enter the vacuum chamber accurately by setting a guide component, thereby improving the quality of vacuum operation; the three sides of the guide component are bent and formed, and the integrated structure improves the rigidity of the guide component.

[0014] A further feature of this invention is that the bag-supporting assembly includes a bag-supporting cylinder fixedly installed at the bottom of a movable plate. The bag-supporting cylinder is arranged vertically, and its output end passes through the movable plate and is fitted with a base plate. The base plate has a support plate that is in contact with its end face. An adjusting plate is fixedly connected to the bottom of the support plate. The adjusting plate has at least one adjusting groove distributed vertically. The side of the base plate that is in contact with the adjusting plate has a connecting hole corresponding to the adjusting groove. Fasteners for connecting the adjusting plate and the base plate pass through the adjusting groove and the connecting hole.

[0015] The present invention, which has the above features, has a bag-supporting cylinder that drives the pallet to rise and fall. The pallet supports the bottom of the packaging bag, causing the packaging bag to hang down, thus preventing the bag opening from stretching and deforming due to its own weight and improving the vacuuming effect. The adjustment groove on the adjustment plate can flexibly adjust the height of the pallet to adapt to packaging bags of different sizes.

[0016] A further feature of this invention is that a guide plate arranged vertically is installed on the inner wall of the movable plate, guide strips are provided at both ends of the bottom plate in the width direction, and guide grooves adapted to the ends of the guide strips are provided on the guide plate.

[0017] The present invention, which has the above features, has a double-sided guide structure that guides the lifting and lowering of the pallet and prevents the pallet from tilting during lifting and lowering.

[0018] A further feature of this invention is that the sealing assembly includes a sealing cylinder fixedly mounted on a fixed plate. The output end of the sealing cylinder passes through the fixed plate in a horizontal direction and is connected to a transition block. A heat sealing strip is connected to one side of the transition block facing the moving plate. A pad adapted to the heat sealing strip is provided inside the moving plate.

[0019] The present invention, which has the above features, has the following characteristics: the sealing component is integrated into the vacuum chamber, and the sealing can be performed directly after vacuuming, simplifying the process; the heat sealing strip and the pad block cooperate to ensure a firm and flat seal.

[0020] A further feature of this invention is that the bag clamping assembly includes a bag clamping cylinder fixedly mounted on a fixed plate. The output end of the bag clamping cylinder passes through the fixed plate in a horizontal direction and is connected to a first connecting rod. The end of the first connecting rod away from the bag clamping cylinder is hinged to a first swing arm arranged in a vertical direction. The end of the first swing arm away from the first connecting rod is connected to a bag clamping plate arranged in a horizontal direction. The bag clamping plate is parallel to the opening of the packaging bag. A guide block is provided inside the fixed plate. The first swing arm passes through the guide block and is hinged to the guide block. An insertion groove is provided on the bag clamping plate. An anti-collision strip fixedly connected to the bag clamping plate is inserted into the insertion groove. An anti-collision block adapted to the anti-collision strip is provided at the bottom of the transition block.

[0021] The present invention, which has the above features, enables the bag clamping assembly and the sealing assembly to be arranged simultaneously in the fixed plate through the transmission mechanism of the connecting rod and the swing arm; and avoids the bag clamping plate from deviating by setting the guide block to constrain the swing trajectory of the first swing arm.

[0022] A further feature of this invention is that: the first driving mechanism is a first electric slide, and a mounting base is connected to the movable slider of the first electric slide; the second driving mechanism is mounted on the mounting base, and the second driving mechanism is a second electric slide; the third driving mechanism includes two lifting cylinders mounted on the sealing plate of the second electric slide, and a finger cylinder mounted on the output end of the lifting cylinder; the clamping end of the finger cylinder is equipped with two clamping plates for clamping packaging bags.

[0023] The present invention, having the above-mentioned features, achieves precise transfer of the packaging bag by setting a first driving mechanism, a second driving mechanism, and a third driving mechanism, thereby enabling the packaging bag to move in the horizontal, vertical, and transverse directions.

[0024] A further feature of this invention is that: two columns are provided below the crossbeam, the columns are located between two movable plates, a support seat is fitted on the column, and a baffle is installed on the support seat. The baffle includes a plate base connected to the end face of the support seat and a vertically arranged plate body. The plate base is fixedly connected to the plate body. The plate base is provided with at least one oblong groove, and the support seat is provided with a connecting hole adapted to the oblong groove.

[0025] The present invention, which has the above features, avoids accidental collisions of packaging bags during transportation by setting baffles, thereby reducing the damage rate of the bags; the waist-shaped groove on the plate seat can adjust the height of the baffles to accommodate packaging bags of different sizes.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0028] Figure 2 This is a schematic diagram of the mold closing assembly and support assembly in an embodiment of the present utility model.

[0029] Figure 3 This is a structural schematic diagram of the fixing plate, sealing assembly, and bag clamping assembly of this utility model embodiment.

[0030] Figure 4 This is a schematic diagram of the structure of the movable plate and bag assembly according to an embodiment of the present utility model.

[0031] Figure 5 This is a schematic diagram of the structure of the bag assembly according to an embodiment of the present utility model. Detailed Implementation

[0032] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0033] like Figure 1-5 The vacuuming device for a bag packaging machine includes two vacuuming components arranged side by side and a bag conveying component. Each vacuuming component includes a movable plate 101 and a fixed plate 102 arranged opposite to each other. A mold-closing component 103 is provided on the end face of the movable plate 101 facing away from the fixed plate 102, driving it to move towards the fixed plate 102. When the movable plate 101 and the fixed plate 102 are closed, a vacuum chamber is formed. The fixed plate 102 has a vacuuming hole 1021 and a clamping device for holding the bag. The bag assembly 104 and the sealing assembly 105 for sealing the packaging bag are provided. The moving plate 101 is provided with a bag support assembly 106. The transfer assembly includes a crossbeam 107 erected between two vacuuming assemblies. The crossbeam 107 is provided with a first drive mechanism for driving the packaging bag to move between the two vacuum chambers. The first drive mechanism is provided with two second drive mechanisms 109 for transferring the packaging bag from the previous work station to the vacuuming station 10. The second drive mechanism 109 is provided with a third drive mechanism 1010 for clamping the packaging bag and driving it to rise and fall.

[0034] The mold clamping assembly 103 includes a first guide rod and guide sleeve assembly 1031 disposed on the vertical surface outside the movable plate 101, a second guide rod and guide sleeve assembly 1032 disposed at the bottom of the movable plate 101, and a mold clamping cylinder 1033. The first guide rod and guide sleeve assembly 1031 is located at the upper part of the vertical surface, and the second guide rod and guide sleeve assembly 1032 is located at the bottom near another vacuum assembly. The first guide rod 10311 of the first guide rod and guide sleeve assembly 1031 and the second guide rod 10321 of the second guide rod and guide sleeve assembly 1032 both extend to connect with the fixed plate 102. The end of the first guide rod 10311 and the second guide rod 10321 away from the fixed plate 102 is provided with a synchronization plate 1034. The output end of the mold clamping cylinder 1033 is connected to the movable plate 101, and the mold clamping cylinder 1033 is fixed on the synchronization plate 1034.

[0035] A support assembly 1011 is provided between the two vacuuming components to support the first guide rod 10311 and the second guide rod 10321. The support assembly 1011 includes a vertical plate 10111 connected to the first guide rod 10311 and a guide rod seat 10112 connected to the second guide rod 10321. A horizontal plate 10113 is provided between the lower ends of the two vertical plates 10111. A triangular plate 10114 is provided between the horizontal plate 10113 and the vertical plate 10111 and is fixedly connected to both. A connecting plate 10115 is provided between the guide rod seat 10112 and the horizontal plate 10113 and is fixedly connected to both.

[0036] A guide member 1012 is provided on the side of the fixed plate 102 near the first drive mechanism. The guide member 1012 includes a first surface 10121 that is attached to and connected to the side of the fixed plate 102, a second surface 122 that is perpendicularly connected to the first surface 10121, and a third surface 123 that is connected to the second surface 122. The second surface 122 is parallel to the moving plate 101, and the third surface 123 is inclined to the side away from the moving plate 101. The first surface 10121, the second surface 122, and the third surface 123 are all bent.

[0037] The bag-supporting assembly 106 includes a bag-supporting cylinder 1061 fixedly installed at the bottom of the movable plate 101. The bag-supporting cylinder 1061 is arranged vertically, and its output end passes through the movable plate 101 and is mounted on a base plate 1062. The base plate 1062 is provided with a support plate 1063 that is in contact with its end face. An adjusting plate 1064 is fixedly connected to the bottom of the support plate 1063. The adjusting plate 1064 is provided with at least one adjusting groove 10641 distributed vertically. The side of the base plate 1062 that is in contact with the adjusting plate 1064 is provided with a connecting hole 10621 corresponding to the adjusting groove 10641. Fasteners for connecting the adjusting plate 1064 and the base plate 1062 are inserted into the adjusting groove 10641 and the connecting hole 10621.

[0038] A guide plate 1065 is installed on the inner wall of the movable plate 101 in a vertical direction. Guide strips 1066 are provided at both ends of the bottom plate 1062 in the width direction. Guide grooves 10651 adapted to the ends of the guide strips 1066 are provided on the guide plate 1065.

[0039] The sealing assembly 105 includes a sealing cylinder 1051 fixedly mounted on a fixed plate 102. The output end of the sealing cylinder 1051 passes through the fixed plate 102 in a horizontal direction and is connected to a transition block 1052. A heat sealing strip 1053 is connected to one side of the transition block 1052 facing the moving plate 101. A pad 1054 adapted to the heat sealing strip 1053 is provided inside the moving plate 101.

[0040] The bag clamping assembly 104 includes a bag clamping cylinder 1041 fixedly mounted on a fixed plate 102. The output end of the bag clamping cylinder 1041 passes through the fixed plate 102 in a horizontal direction and is connected to a first connecting rod 1042. The end of the first connecting rod 1042 away from the bag clamping cylinder 1041 is hinged to a first swing arm 1043 arranged in a vertical direction. The end of the first swing arm 1043 away from the first connecting rod 1042 is connected to a bag clamping plate 1044 arranged in a horizontal direction. The bag clamping plate 1044 is parallel to the bag opening of the packaging bag. A guide block 1045 is provided in the fixed plate 102. The first swing arm 1043 passes through the guide block 1045 and is hinged to the guide block 1045. The bag clamping plate 1044 is provided with an insertion groove 10441. An anti-collision strip 1046 fixedly connected to the bag clamping plate 1044 is inserted into the insertion groove 10441. An anti-collision block 1055 adapted to the anti-collision strip 1046 is provided at the bottom of the transition block 1052.

[0041] The first drive mechanism is a first electric slide (not shown in the figure). The moving slider of the first electric slide is connected to a mounting base 108. The second drive mechanism 109 is mounted on the mounting base 108. The second drive mechanism 109 is a second electric slide. The third drive mechanism 1010 includes two lifting cylinders 10101 mounted on the sealing plate of the second electric slide, and a finger cylinder 10102 mounted on the output end of the lifting cylinder 10101. The clamping end of the finger cylinder 10102 is equipped with two clamping plates 10103 for clamping packaging bags.

[0042] Two columns 1013 are provided below the crossbeam 107. The columns 1013 are located between the two movable plates 101. A support seat 1014 is sleeved on the column 1013. A baffle 1015 is installed on the support seat 1014. The baffle 1015 includes a plate base 10151 connected to the end face of the support seat 1014 and a vertically arranged plate body 10152. The plate base 10151 and the plate body 10152 are fixedly connected. The plate base 10151 is provided with at least one waist-shaped groove 101511. The support seat 1014 is provided with a connecting hole 10621 that matches the waist-shaped groove 101511.

[0043] After the packaging bag is filled with materials, the second drive mechanism moves horizontally and longitudinally towards the previous station. The clamping plate in the third drive mechanism holds the packaging bag, which then moves horizontally and longitudinally to a position between two vacuuming components. The first drive mechanism then sends the packaging bag into one of the vacuuming components. Guided by the guide component, the packaging bag is accurately fed between the moving plate and the fixed plate. The mold closing component drives the moving plate towards the fixed plate. During this process, the bottom of the packaging bag is supported by the support plate of the bag supporting component, and the top of the packaging bag is clamped by the clamping plate of the bag clamping component. The third drive mechanism rises, and the fixed plate and the moving plate close to form a vacuum chamber. The vacuuming tool extracts air from the vacuuming hole. After the packaging bag is vacuumed, the heat sealing strip of the sealing component extends and fits against the pad to heat seal the opening of the packaging bag. After heat sealing, the mold closing component drives the moving plate to separate from the fixed plate, and the packaging bag falls onto the conveyor belt set below the vacuuming component and leaves the equipment.

Claims

1. A vacuuming device for a bag packaging machine, characterized in that: The device includes two vacuuming components arranged side by side and a transfer component for conveying packaging bags. The vacuuming components include a movable plate and a fixed plate arranged opposite each other. The movable plate has a mold closing component on its side facing away from the fixed plate, which drives it to move toward the fixed plate. After the movable plate and the fixed plate are closed, a vacuum chamber is formed. The fixed plate has a vacuuming hole, a bag clamping component for clamping the packaging bag, and a sealing component for sealing the packaging bag. The movable plate has a bag supporting component. The transfer component includes a crossbeam erected between the two vacuuming components. The crossbeam has a first drive mechanism for driving the packaging bag to move between the two vacuum chambers. The first drive mechanism has two second drive mechanisms for conveying the packaging bag from the previous workpiece to the vacuuming workpiece. The second drive mechanism has a third drive mechanism for clamping the packaging bag and driving it to move up and down.

2. The vacuuming device for a bag packaging machine according to claim 1, characterized in that: The mold clamping assembly includes a first guide rod and guide sleeve assembly disposed on the vertical surface outside the movable plate, a second guide rod and guide sleeve assembly disposed at the bottom of the movable plate, and a mold clamping cylinder. The first guide rod and guide sleeve assembly is located at the upper part of the vertical surface, and the second guide rod and guide sleeve assembly is located at the bottom on the side close to another vacuum assembly. The first guide rod of the first guide rod and guide sleeve assembly and the second guide rod of the second guide rod and guide sleeve assembly both extend to connect with the fixed plate. The ends of the first guide rod and the second guide rod away from the fixed plate are provided with a synchronization plate. The output end of the mold clamping cylinder is connected to the movable plate, and the mold clamping cylinder is fixed on the synchronization plate.

3. The vacuuming device for a bag packaging machine according to claim 2, characterized in that: Between the two vacuuming components, there is a support assembly for supporting the first guide rod and the second guide rod. The support assembly includes a vertical plate connected to the first guide rod and a guide rod seat connected to the second guide rod. A horizontal plate is provided between the lower ends of the two vertical plates. A triangular plate is provided between the horizontal plate and the vertical plate and fixedly connected to both. A connecting plate is provided between the guide rod seat and the horizontal plate and fixedly connected to both.

4. The vacuuming device for a bag packaging machine according to claim 1, characterized in that: The fixed plate has a guide member on the side near the first driving mechanism. The guide member includes a first surface that is attached to and connected to the side of the fixed plate, a second surface that is perpendicularly connected to the first surface, and a third surface that is connected to the second surface. The second surface is parallel to the moving plate, and the third surface is inclined to the side away from the moving plate. The first surface, the second surface, and the third surface are all bent.

5. The vacuuming device for a bag packaging machine according to claim 1, characterized in that: The bag-supporting assembly includes a bag-supporting cylinder fixedly installed at the bottom of a movable plate. The bag-supporting cylinder is arranged vertically, and its output end passes through the movable plate and is mounted on a base plate. The base plate is provided with a support plate that is in contact with its end face. An adjusting plate is fixedly connected to the bottom of the support plate. The adjusting plate is provided with at least one adjusting groove distributed in the vertical direction. The side of the base plate that is in contact with the adjusting plate is provided with a connecting hole corresponding to the adjusting groove. Fasteners for connecting the adjusting plate and the base plate are inserted into the adjusting groove and the connecting hole.

6. The vacuuming device for a bag packaging machine according to claim 5, characterized in that: The inner wall of the movable plate is equipped with a guide plate arranged in the vertical direction, and the two ends of the bottom plate in the width direction are provided with guide strips. The guide plate is provided with guide grooves that are adapted to the ends of the guide strips.

7. The vacuuming device for a bag packaging machine according to claim 1, characterized in that: The sealing assembly includes a sealing cylinder fixedly mounted on a fixed plate. The output end of the sealing cylinder passes through the fixed plate in a horizontal direction and is connected to a transition block. A heat sealing strip is connected to one side of the transition block facing the moving plate. A pad adapted to the heat sealing strip is provided inside the moving plate.

8. The vacuuming device for a bag packaging machine according to claim 7, characterized in that: The bag clamping assembly includes a bag clamping cylinder fixedly mounted on a fixed plate. The output end of the bag clamping cylinder passes through the fixed plate in a horizontal direction and is connected to a first connecting rod. The end of the first connecting rod away from the bag clamping cylinder is hinged to a first swing arm arranged in a vertical direction. The end of the first swing arm away from the first connecting rod is connected to a bag clamping plate arranged in a horizontal direction. The bag clamping plate is parallel to the opening of the packaging bag. A guide block is provided in the fixed plate. The first swing arm passes through the guide block and is hinged to the guide block. An insertion groove is provided on the bag clamping plate. An anti-collision strip fixedly connected to the bag clamping plate is inserted in the insertion groove. An anti-collision block adapted to the anti-collision strip is provided at the bottom of the transition block.

9. A vacuuming device for a bag packaging machine according to any one of claims 1-8, characterized in that: The first driving mechanism is a first electric slide, and a mounting base is connected to the moving slider of the first electric slide. The second driving mechanism is mounted on the mounting base and is a second electric slide. The third driving mechanism includes two lifting cylinders mounted on the sealing plate of the second electric slide and a finger cylinder mounted on the output end of the lifting cylinder. The clamping end of the finger cylinder is equipped with two clamping plates for clamping packaging bags.

10. A vacuuming device for a bag packaging machine according to any one of claims 1-8, characterized in that: Two columns are provided below the crossbeam. The columns are located between two movable plates. A support seat is fitted on the column. A baffle is installed on the support seat. The baffle includes a plate base connected to the end face of the support seat and a vertically arranged plate body. The plate base is fixedly connected to the plate body. The plate base is provided with at least one waist-shaped groove. The support seat is provided with a connection hole adapted to the waist-shaped groove.

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