CN219257955U - Wrapping bag trimmer and equipment for packing - Google Patents

Abstract

The application discloses wrapping bag plastic machine, including the closing conveyer that is used for pressing from both sides tight sack of wrapping bag to carry, be used for opening or the side of closed wrapping bag sack and with the side of wrapping bag along the inside folding plastic device of central line, this plastic device includes first jet-propelled plastic pipe, second jet-propelled plastic pipe, first actuating mechanism and the air pump of being connected with the two, first actuating mechanism can remove first jet-propelled plastic pipe to the side one department of wrapping bag and make the mouth of pipe of first jet-propelled plastic pipe face the central line of side one, first actuating mechanism can remove second jet-propelled plastic pipe to the side two departments of wrapping bag and make the mouth of pipe of second jet-propelled plastic pipe face the central line of side two. The wrapping bag plastic machine of this application can be at the roughness of the in-process real-time adjustment sack of closed sack, makes the sack level and smooth closure. The application also discloses a packaging equipment, it has the wrapping bag trimmer of this application, and this packaging equipment seals and levels, guarantees the packing quality.

Description

Wrapping bag trimmer and equipment for packing

Technical Field

The utility model relates to the technical field of packaging equipment, in particular to a packaging bag shaping machine and packaging equipment.

Background

An organ bag is a common packaging bag, and the organ bag is unfolded to be provided with side faces, and when the organ bag is folded, the side faces of the bag body are folded inwards along a central line to form folded edges. After the organ bag is filled with materials, the bag body

The side is propped open, and the bag opening part is in a propped open state, if the bag opening is directly pressed up and down by a sealing machine, the problems of uneven bag opening, sealing leakage, unstable sealing and the like can occur.

In order to solve the above problems, chinese patent application No. CN202020585475.2 discloses a bag-setting device, a bag-folding device and a bag-packaging machine, wherein the bag-setting device includes a bag-lifting mechanism and a pinching mechanism, and the pinching mechanism can push the side portion of the opening portion inward to form a folded portion. However, as the material is filled in the packaging bag, after the bag opening is tidied by the opening pinching mechanism, the bag opening cannot be completely and smoothly aligned, and after the packaging bag is conveyed to the next process for sealing, the sealing effect is poor and irregular, and the packaging quality is affected.

Disclosure of Invention

The utility model aims to provide a packaging bag shaping machine for improving the flatness of an organ bag seal and packaging equipment for improving the packaging quality.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

a packaging bag shaping machine comprises a sealing conveying device used for clamping a bag opening of a packaging bag for conveying, a bag opening device matched with the sealing conveying device and used for opening or closing the bag opening of the packaging bag, and a shaping device matched with the bag opening device and used for inwards folding the side face of the packaging bag along a central line. The shaping device comprises a first air injection shaping pipe, a second air injection shaping pipe, a first driving mechanism connected with the first air injection shaping pipe and the second air injection shaping pipe, and an air pump connected with the first air injection shaping pipe and the second air injection shaping pipe. The first driving mechanism can move the first air injection shaping pipe to the first side of the packaging bag and enable the pipe orifice of the first air injection shaping pipe to face the center line of the first side, and the first driving mechanism can move the second air injection shaping pipe to the second side of the packaging bag and enable the pipe orifice of the second air injection shaping pipe to face the center line of the second side.

Preferably, the sealing conveyor comprises a first conveyor mechanism, a second conveyor mechanism parallel to and operating synchronously with the first conveyor mechanism, and a second drive mechanism connecting the first conveyor mechanism and the second conveyor mechanism. The second driving mechanism is used for driving the first conveying mechanism and the second conveying mechanism to move towards each other or back to each other so as to clamp the packaging bag between the first conveying mechanism and the second conveying mechanism for conveying.

Preferably, the first conveying mechanism comprises a first bracket fixed on the second driving mechanism, a first motor fixed on one end of the first bracket, a first belt wheel fixed on an output shaft of the first motor, a second belt wheel rotatably arranged on the other end of the first bracket, and a first synchronous belt wound on the first belt wheel and the second belt wheel. The second conveying mechanism comprises a second bracket fixed on the second driving mechanism, a second motor fixed at one end of the second bracket, a third belt wheel fixed on an output shaft of the second motor, a fourth belt wheel rotatably arranged at the other end of the second bracket, and a second synchronous belt wound on the third belt wheel and the fourth belt wheel.

Preferably, the first bracket is provided with a first clamping plate contacting with the inner surface of the first synchronous belt at one side close to the second conveying mechanism, and the second bracket is provided with a second clamping plate contacting with the inner surface of the second synchronous belt at one side close to the first conveying mechanism. Or, the first bracket is provided with a plurality of first pinch rollers which are abutted against the inner surface of the first synchronous belt on one side close to the second conveying mechanism, and the second bracket is provided with a plurality of second pinch rollers which are abutted against the inner surface of the second synchronous belt on one side close to the first conveying mechanism.

Preferably, the second driving mechanism comprises a first frame, a screw rod fixed on the first frame through bearings arranged at two ends of the first frame, a third motor for driving the screw rod to rotate, a first nut which is connected to the screw rod in a threaded mode and is used for being fixedly connected with the first bracket, a second nut which is connected to the screw rod in a threaded mode and is used for being fixedly connected with the second bracket, a guide rail which is fixed to the first frame and is parallel to the screw rod, a first sliding block which is arranged on the guide rail in a sliding mode and is used for being fixedly connected with the first bracket, and a second sliding block which is arranged on the guide rail in a sliding mode and is used for being fixedly connected with the second bracket.

Preferably, the bag opening device comprises a first air cylinder fixed on the first bracket, a second air cylinder fixed on the second bracket, a first fixing plate connected to a piston rod of the first air cylinder, a second fixing plate connected to a piston rod of the second air cylinder, a first group of vacuum chucks fixed on the first fixing plate, a second group of vacuum chucks fixed on the second fixing plate, and a vacuum generating device connected with the first group of vacuum chucks and the second group of vacuum chucks.

Preferably, the first conveying mechanism and the second conveying mechanism are provided with a conveying belt on the same side.

Preferably, the included angle between the first air injection molding pipe and the first side surface is 30 degrees or more and less than or equal to 50 degrees or less. The included angle between the second air injection shaping pipe and the second side surface is 30 degrees or more and b is or less than 50 degrees.

Preferably, the first driving mechanism comprises a second frame, a third cylinder fixed on the second frame, a connecting plate fixed on a piston rod of the third cylinder, a first mounting plate fixedly connected with the connecting plate, a first adjusting hole for mounting a first air injection integral pipe, a second mounting plate fixedly connected with the connecting plate, a second adjusting hole for mounting a second air injection integral pipe, a linear bearing fixed on the second frame, a guide shaft inserted in the linear bearing and fixedly connected with the connecting plate, and the guide shaft is parallel to the third cylinder.

A packaging device is provided with the packaging bag shaping machine.

By adopting the technical scheme, the utility model has the beneficial effects that: according to the packaging bag shaping machine, in the process of closing the bag opening of the bag opening device, the side face of the packaging bag is folded by using the airflow sprayed by the shaping device, and the bag opening of the shaped packaging bag is clamped by the sealing conveying device and conveyed, so that the bag opening device, the shaping device and the sealing conveying device are tightly matched, the time is less, the flatness of the bag opening can be adjusted in real time in the process of closing the bag opening, the flatness of the bag opening is kept, and the quality of subsequent sealing is improved. Packaging is carried out by using the packaging equipment with the packaging bag shaping machine, the packaging seal is smooth, no folds are generated, and the packaging quality is further improved.

Drawings

Fig. 1 is a schematic perspective view of a package bag shaper according to a first embodiment.

Fig. 2 is a schematic perspective view of the seal conveying device in fig. 1.

Fig. 3 is an enlarged schematic view at a in fig. 1.

Fig. 4 is a schematic perspective view of the shaping device in fig. 1.

Fig. 5 is a schematic top view of fig. 1 (with the air pump and vacuum generator hidden).

Fig. 6 is a schematic view of the bag tidying machine (with the air pump and vacuum generating device hidden) of the bag shaper of fig. 1.

Fig. 7 is a schematic perspective view of a seal conveying device according to a second embodiment.

Wherein: 100. the seal includes a seal transfer device 110, a first transfer mechanism 111, a first bracket 112, a first motor 113, a first pulley 114, a second pulley 115, a first timing belt 116, a first clamping plate 117, a first pinch roller, 120, a second transfer mechanism 121, a first bracket 122, a second motor 123, a third pulley 124, a fourth pulley 125, a second timing belt 126, a second clamping plate 127, a second pinch roller 130, a second drive mechanism 131, a first frame 132, a screw, 133, a third motor 134, a first nut 135, a second nut 136, a guide rail 137, a first slider 138, a second slider 140, a conveyor belt. 200.bag opening device, 210.first cylinder, 220.second cylinder, 230.first fixed plate, 240.second fixed plate, 250.first set of vacuum cups, 260.second set of vacuum cups, 270.vacuum generating device, 300.shaping device, 310.first jet manifold, 320.second jet manifold, 330.first drive mechanism, 331.second frame, 332.third cylinder, 333.connecting plate, 334.first mounting plate, 335.first adjustment aperture, 336.second mounting plate, 337.second adjustment aperture, 338.linear bearing, 339.guide shaft, 340.air pump, organ bag 4, side one 41, side two 42, centerline 43.

Detailed Description

The utility model will be further described with reference to the drawings and detailed description.

As shown in fig. 1, the package bag shaper of the present embodiment includes: a seal conveyor 100, a bag opening device 200 and a shaping device 300. The seal conveying device 100 is used for clamping and conveying the mouth of the organ bag 4, the bag opening device 200 is used for opening or closing the mouth of the organ bag 4, and the shaping device 300 is used for spraying air flow to fold the side face of the organ bag 4 inwards along the center line 43 of the side face to form folding edges. The seal conveying device 100 and the bag opening device 200 are matched with each other to open the mouth of the organ bag 4, and the seal conveying device 100, the bag opening device 200 and the shaping device 300 are matched with each other to tidy the mouth of the organ bag 4 in the process of closing the mouth of the organ bag 4, so that the mouth is smoothly closed.

Specifically, referring to fig. 2, the seal conveying device 100 of the present embodiment includes: a first conveying mechanism 110, a second conveying mechanism 120, a second driving mechanism 130, and a conveying belt 140. Wherein the second driving mechanism 130 includes: the first frame 131, the screw 132, the third motor 133, the first nut 134, the second nut 135, the guide rail 136, the first slider 137, the second slider 138, the driving pulley, the driven pulley, and the belt. The screw rod 132 is fixed on the first frame 131 through bearings arranged at two ends of the screw rod 132, one end of the screw rod 132 is fixed with a driven wheel, the third motor 133 is fixed on the first frame 131, the output shaft of the third motor is fixed with a driving wheel, the driving wheel and the driven wheel are connected through a belt transmission, the first nut 134 and the second nut 135 are connected on the screw rod 132 in a threaded manner, the internal threads of the first nut 134 and the internal threads of the second nut 135 are opposite in rotation direction, the screw rod 132 rotates clockwise or anticlockwise, and the first nut 134 and the second nut 135 can move oppositely or move back. The two sides of the screw 132 are respectively provided with a guide rail 136 fixed on the first frame 131 in parallel, and each guide rail 136 is provided with a first slide block 137 and a second slide block 138 in a sliding manner.

The first and second transfer mechanisms 110 and 120 are disposed in parallel up and down. The first transfer mechanism 110 includes: a first bracket 111, a first motor 112, a first pulley 113, a second pulley 114, a first timing belt 115, and a first clamping plate 116. Wherein, the first bracket 111 is fixed on the first nut 134 and the first slider 137, one end of the first bracket 111 is fixed with the first motor 112, the output shaft of the first motor 112 is fixed with the first belt pulley 113, the second belt pulley 114 is rotatably arranged at the other end of the first bracket 111 through a bearing, the first clamping plate 116 is fixed at the lower side of the first bracket 111, and the first synchronous belt 115 is wound on the first belt pulley 113, the second belt pulley 114 and the first clamping plate 116. The second transfer mechanism 120 includes: a second bracket 121, a second motor 122, a third pulley 123, a fourth pulley 124, a second timing belt 125, and a second clamping plate 126. The second bracket 121 is fixed on the second nut 135 and the second slider 138, the second motor 122 is fixed at one end of the second bracket 121, the third belt wheel 123 is fixed on the output shaft of the second motor 122, the fourth belt wheel 124 is rotatably arranged at the other end of the second bracket 121 through a bearing, the second clamping plate 126 is fixed at the upper side of the second bracket 121, and the second synchronous belt 125 is wound on the third belt wheel 123, the fourth belt wheel 124 and the second clamping plate 126. The sealing and conveying device 100 clamps the organ bag 4 according to the working principle that: the organ bag 4 is placed between the first conveying mechanism 110 and the second conveying mechanism 120, the third motor 133 drives the screw 132 to rotate, and then drives the first conveying mechanism 110 and the second conveying mechanism 120 to move towards each other until the lower surface of the first synchronous belt 115 contacts with the upper surface of the second synchronous belt 125, so that the organ bag 4 is clamped between the first synchronous belt 115 and the second synchronous belt 125, and the first clamping plate 116 and the second clamping plate 126 can assist the first synchronous belt 115 and the second synchronous belt 125 to clamp the organ bag 4 so as to effectively clamp the mouth of the organ bag 4. The conveyor belt 140 is provided on the same side of the first conveyor mechanism 110 and the second conveyor mechanism 120 for assisting in supporting the organ bag 4. The seal conveying device 100 of this embodiment can save half of conveying time compared with a reciprocating conveying device, and is beneficial to improving packaging speed and yield.

Referring to fig. 3, the bag opening device 200 of the present embodiment includes: the vacuum chuck assembly comprises a first cylinder 210, a second cylinder 220, a first fixing plate 230, a second fixing plate 240, a first set of vacuum chucks 250, a second set of vacuum chucks 260, and a vacuum generating device 270. The first cylinder 210 is fixed on the first bracket 111, the end of the piston rod of the first cylinder 210 is fixed with a first fixing plate 230, the first fixing plate 230 is fixed with a first set of vacuum chucks 250, the second cylinder 220 is fixed on the second bracket 121, the end of the piston rod of the second cylinder 220 is fixed with a second fixing plate 240, the second fixing plate 240 is fixed with a second set of vacuum chucks 260, and both the first set of vacuum chucks 250 and the second set of vacuum chucks 260 are connected with a vacuum generating device 270. Referring to fig. 6, after the seal transferring apparatus 100 transfers the bellows bag 4 between the first group of vacuum chucks 250 and the second group of vacuum chucks 260, the first cylinder 210 drives the first group of vacuum chucks 250 to move downward, the second cylinder 220 drives the second group of vacuum chucks 260 to move upward, the vacuum generating apparatus 270 generates negative air pressure in the first group of vacuum chucks 250 and the second group of vacuum chucks 260, the first group of vacuum chucks 250 adsorbs the bellows bag 4 from the front surface of the bellows bag 4, the second group of vacuum chucks 260 adsorbs the bellows bag 4 from the back surface of the bellows bag 4, and then the second driving mechanism 130 drives the first transferring mechanism 110 and the second transferring mechanism 120 to move backward, and the first group of vacuum chucks 250 and the second group of vacuum chucks 260 also move backward, so that the mouth of the bellows bag 4 is opened, and materials can be loaded into the bellows bag 4.

Referring to fig. 4 to 6, the shaping apparatus 300 of the present embodiment includes: a first jet manifold 310, a second jet manifold 320, a first drive mechanism 330, and a gas pump 340. Wherein the first driving mechanism 330 includes: the second frame 331, the third cylinder 332, the connection plate 333, the first mounting plate 334, the second mounting plate 336, the linear bearing 338, and the guide shaft 339. The third cylinder 332 is fixed on the second frame 331, the both sides of the third cylinder 332 are respectively provided with a linear bearing 338 fixed on the second frame 331, a guide shaft 339 is inserted in each linear bearing 338, the guide shaft 339 is parallel to the third cylinder 332, a connecting plate 333 is fixedly connected with the end part of a piston rod of the third cylinder 332 and one end of the guide shaft 339, a first mounting plate 334 and a second mounting plate 336 which are arranged at intervals are fixedly arranged on the connecting plate 333, a first adjusting hole 335 is formed in the first mounting plate 334, a second adjusting hole 337 is formed in the second mounting plate 336, the first air-jet integral pipe 310 is arranged in the first adjusting hole 335, the second air-jet integral pipe 320 is arranged in the second adjusting hole 337, the first adjusting hole 335 and the second adjusting hole 337 are all strip-shaped holes, and the setting height of the first air-jet integral pipe 310 can be adjusted by adjusting the position of the first air-jet integral pipe 310 in the first adjusting hole 335 so as to adapt to the air bags 4 of different width, and further improve the universality of the air-jet integral pipe shaping machine. The air pump 340 connects the first air injection molding pipe 310 and the second air injection molding pipe 320 to provide high pressure air flow to both. The working principle of the shaping device 300 of this embodiment is as follows: the first driving mechanism 330 moves the first air-jet shaping tube 310 and the second air-jet shaping tube 320 downward to both sides of the organ bag 4, at this time, the organ bag 4 is located between the first fixing plate 230 and the second fixing plate 240, the first air-jet shaping tube 310 is located at the same level as the center line 43 of the side face one 41 of the organ bag 4, the orifice of the first air-jet shaping tube 310 faces the center line 43 of the side face one 41, the included angle a between the first air-jet shaping tube 310 and the side face one 41 is 30 degrees less than or equal to 50 degrees, the center line 43 of the side face two 42 of the organ bag 4 is located at the same level as the second air-jet shaping tube 320, the orifice of the second air-jet shaping tube 320 faces the center line 43 of the side face two 42, and the included angle b between the second air-jet shaping tube 320 and the side face two 42 is 30 degrees less than or equal to 50 degrees. The air-jet shaping pipe and the organ bag 4 form a certain included angle, so that the air-jet shaping pipe jets air flow obliquely, after the air flow is jetted on the side face of the organ bag 4, the air flow can flow out along the central line 43 of the organ bag 4 towards the bag mouth direction, along with the second driving mechanism 130 driving the first conveying mechanism 110 and the second conveying mechanism 120 to move towards each other, the bag mouth of the organ bag 4 is gradually closed, the folding edge on the upper side of the central line 43 and the folding edge on the lower side of the central line 43 are gradually closed, the space between the folding edge and the folding edge is gradually reduced, the air flow flowing at high speed can generate negative pressure between the folding edge and the folding edge, and then the air flow is gradually absorbed together, the bag mouth of the organ bag 4 is orderly closed, then is tightly pressed by the sealing conveying device 100, and finally the bag opening device 200 and the shaping device 300 are reset.

The product packaged by the packaging equipment with the packaging bag shaping machine has the advantages of flat sealing, no wrinkles, good packaging quality and improved production speed.

Example two

As shown in fig. 7, the package bag shaper of the present embodiment is similar to the package bag shaper of the first embodiment in structure, and is mainly different from the package bag shaper of the first embodiment in that the seal conveying device 100 of the present embodiment uses a pinch roller to assist the synchronous belt to clamp the organ bag 4, and has the following specific structure:

a plurality of first pinch rollers 117 are fixed on the lower side of the first support 111 at intervals, a plurality of second pinch rollers 127 are fixed on the upper side of the second support 121 at intervals, the first pinch rollers 117 are abutted against the inner surface of the lower belt section of the first synchronous belt 115, the second pinch rollers 127 are abutted against the inner surface of the upper belt section of the second synchronous belt 125, so that the organ bag 4 can be clamped between the first pinch rollers 117 and the second pinch rollers 127, and the organ bag 4 is prevented from being slightly stressed, namely, the organ bag 4 is prevented from being separated from the seal conveying device 100 or the original placement position of the organ bag 4 is changed, so that the effect of subsequent shaping and sealing is affected.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. A package bag shaper, comprising:

the sealing conveying device (100) is used for clamping the bag mouth of the packaging bag for conveying;

the bag opening device (200) is matched with the sealing conveying device (100) and is used for opening or closing the bag mouth of the packaging bag;

the shaping device (300) is matched with the bag opening device (200) and is used for inwards folding the side face of the packaging bag along the central line (43), and the shaping device (300) comprises:

a first jet forming tube (310);

a second jet forming tube (320);

the first driving mechanism (330) is connected with the first air-jet shaping pipe (310) and the second air-jet shaping pipe (320), the first driving mechanism (330) can move the first air-jet shaping pipe (310) to the side surface one (41) of the packaging bag and enable the pipe mouth of the first air-jet shaping pipe (310) to face the central line (43) of the side surface one (41), and the first driving mechanism (330) can move the second air-jet shaping pipe (320) to the side surface two (42) of the packaging bag and enable the pipe mouth of the second air-jet shaping pipe (320) to face the central line (43) of the side surface two (42);

and the air pump (340) is connected with the first air injection shaping pipe (310) and the second air injection shaping pipe (320).

2. The bag shaper of claim 1, wherein said seal conveyor (100) comprises:

a first conveying mechanism (110);

a second conveyor (120) parallel to said first conveyor (110) and operating in synchronism with said first conveyor (110);

and the second driving mechanism (130) is connected with the first conveying mechanism (110) and the second conveying mechanism (120) and is used for driving the first conveying mechanism (110) and the second conveying mechanism (120) to move towards each other or move away from each other so as to clamp the packaging bag between the first conveying mechanism (110) and the second conveying mechanism (120) for conveying.

3. The bag shaper of claim 2, wherein,

the first transfer mechanism (110) includes:

a first bracket (111) fixed to the second driving mechanism (130);

a first motor (112) fixed to one end of the first bracket (111);

a first pulley (113) fixed on the output shaft of the first motor (112);

a second belt wheel (114) rotatably provided at the other end of the first bracket (111);

a first synchronous belt (115) wound around the first pulley (113) and the second pulley (114);

the second conveying mechanism (120) comprises:

a second bracket (121) fixed to the second driving mechanism (130);

a second motor (122) fixed to one end of the second bracket (121);

a third belt wheel (123) fixed on the output shaft of the second motor (122);

a fourth belt wheel (124) rotatably provided at the other end of the second bracket (121);

and a second timing belt (125) wound around the third pulley (123) and the fourth pulley (124).

4. The bag shaper of claim 3, wherein,

a first clamping plate (116) which is contacted with the inner surface of the first synchronous belt (115) or a plurality of first pinch rollers (117) which are abutted with the inner surface of the first synchronous belt (115) are arranged on one side of the first bracket (111) close to the second conveying mechanism (120);

the second bracket (121) is provided with a second clamping plate (126) which is contacted with the inner surface of the second synchronous belt (125) or a plurality of second pinch rollers (127) which are abutted with the inner surface of the second synchronous belt (125) at one side close to the first conveying mechanism (110).

5. The bag shaper of claim 4, wherein said second drive mechanism (130) comprises:

a first chassis (131);

the screw rod (132) is fixed on the first rack (131) through bearings arranged at two ends of the screw rod;

a third motor (133) for driving the screw (132) to rotate;

the first nut (134) is connected to the lead screw (132) in a threaded manner and is used for fixedly connecting the first bracket (111);

the second nut (135) is in threaded connection with the lead screw (132), the screwing direction of the internal thread of the second nut is opposite to that of the internal thread of the first nut (134), and the second nut (135) is used for fixedly connecting with the second bracket (121);

a guide rail (136) fixed on the first frame (131) and parallel to the screw (132);

the first sliding block (137) is arranged on the guide rail (136) in a sliding manner and is used for fixedly connecting with the first bracket (111);

and the second sliding block (138) is arranged on the guide rail (136) in a sliding manner and is used for fixedly connecting with the second bracket (121).

6. The bag shaper of claim 5, wherein said bag opening device (200) comprises:

a first cylinder (210) fixed to the first bracket (111);

a second cylinder (220) fixed to the second bracket (121);

a first fixing plate (230) connected to a piston rod of the first cylinder (210);

a second fixing plate (240) connected to a piston rod of the second cylinder (220);

a first set of vacuum chucks (250) secured to the first stationary plate (230);

a second set of vacuum chucks (260) secured to the second stationary plate (240);

and the vacuum generating device (270) is connected with the first group of vacuum chucks (250) and the second group of vacuum chucks (260).

7. The bag shaper of claim 6, wherein said seal conveyor (100) further comprises a conveyor belt (140) disposed on a same side of the first conveyor mechanism (110) and the second conveyor mechanism (120).

8. The bag shaper of any of claims 1 to 7, wherein said first air jet shaping tube (310) forms an angle of 30 ° or less a or less than 50 ° with side one (41) and said second air jet shaping tube (320) forms an angle of 30 ° or less b or less than 50 ° with side two (42).

9. The bag shaper of claim 8, wherein said first drive mechanism (330) comprises:

a second frame (331);

a third cylinder (332) fixed on the second frame (331);

a connecting plate (333) fixed on the piston rod of the third cylinder (332);

the first mounting plate (334) is provided with a first adjusting hole (335) for mounting the first air injection integral pipe (310), and the first mounting plate (334) is fixedly connected with the connecting plate (333);

the second mounting plate (336) is provided with a second adjusting hole (337) for mounting the second air injection integral pipe (320), the second mounting plate (336) is fixedly connected with the connecting plate (333), and the second mounting plate (336) and the first mounting plate (334) are arranged at intervals so as to accommodate the packaging bag between the two;

a linear bearing (338) fixed on the second frame (331);

the guide shaft (339) is inserted into the linear bearing (338) and is fixedly connected with the connecting plate (333), and the guide shaft (339) is parallel to the third cylinder (332).

10. Packaging plant, characterized by a packaging bag shaper according to any of claims 1-9.

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