Automatic weighing packaging machine

Abstract

The utility model provides an automatic weighing and packaging machine. The automatic weighing and packaging machine comprises a rack, a feeding mechanism, a packaging bag conveying line, a bag taking mechanism, a bag opening mechanism and a weighing and feeding device, according to the utility model, the pallet loaded with the packaging bags is conveyed to the bag taking position through the packaging bag conveying line, and the packaging bags are grabbed on the pallet by the bag taking mechanism and moved to the bag opening position; then the packaging bag is opened through the bag opening mechanism, and bag opening and fixing of a bag opening are completed; the motor drives the rocker arm to feed the packaging bag to a hopper opening; polycrystalline silicon blocks are conveyed into the hopper through the feeding mechanism, when the weighing module detects that the weight of fed materials is qualified, the air cylinder controlling opening and closing of the hopper drives the connecting rod mechanism to open the hopper, the blocks in the hopper fall into a packaging bag, after discharging is completed, closing is conducted again, the bag clamping plates are opened, and the packaging bag falls into the conveying line body. Sealing is realized at the sealing device; therefore, the functions of automatic bag feeding, bag opening, material supplying, weighing and conveying are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to polycrystalline silicon block packing technical field, especially a kind of automatic weighing packing machine. BACKGROUND

[0002] Polycrystalline silicon block is a kind of common semiconductor raw material, is widely used in semiconductor industry, electronic information industry, solar photovoltaic cell industry. In order to facilitate storage, transportation, enterprise is more used polyethylene bag to manually pack polycrystalline silicon block. The current packing method is manually first into packing bag in blocky bulk material, then this material bag is placed on electronic platform scale and weighed, manually adds or reduces material according to weighing result, manually seals packing bag opening when material weight reaches preset value, then manually the packing bag of this encapsulation is packed into outer packing bag or outer packing box. This manual packing method, worker's labor intensity is big, packaging efficiency is low, polycrystalline silicon is easily polluted, and it seriously affects packaging efficiency problem. SUMMARY

[0003] The utility model aims at providing a kind of automatic weighing packing machine, with the effect of automatic bagging, opening bag, feeding, bagging, weighing, conveying, improve packaging efficiency.

[0004] The utility model realizes the above-mentioned technical purpose by the following technical scheme: an automatic weighing packing machine, including rack, the bag taking mechanism for grabbing packing bag being arranged on the rack, the bag opening mechanism for opening packing bag and moving packing bag to the below hopper being arranged on the rack, the weighing feeding device for filling packing material into packing bag being arranged on the rack, the feeding mechanism for filling packing material into hopper and the packing bag conveying line for providing packing bag for bag taking mechanism.

[0005] Preferably, the feeding mechanism includes a feeding vibration table frame, a vibration generator arranged on the feeding vibration table frame, a feeding chute arranged on the vibration generator and used for conveying packing material, a feeding chute inlet connected with an external feeding system, and a feeding chute outlet arranged directly above the hopper inlet.

[0006] Preferably, the packing bag conveying line includes a packing bag stack collecting cabinet, a trolley conveying line arranged on the rack and controlling the left and right movement of the third trolley, a first trolley, a second trolley, a third trolley and a fourth trolley used for conveying packing bag stacks, a packing bag detection sensor and a conveying belt arranged on each trolley.

[0007] Preferably, the bag taking mechanism comprises a horizontal moving rodless cylinder arranged on the frame and driving the first suction cup support to move, the first suction cup support arranged on the horizontal moving rodless cylinder, the suction cup vacuum gauge arranged on the first suction cup support, the first cylinder arranged on the first suction cup support and controlling the first suction cup mounting plate to lift, the first suction cup mounting plate arranged on the piston rod of the first cylinder and the bag taking suction cups arranged on the first suction cup mounting plate.

[0008] Preferably, the bag opening mechanism comprises the second suction cup mounting plate arranged on the frame, the bag opening lower suction cups arranged on the second suction cup mounting plate, the second suction cup support arranged on the frame, the second cylinder arranged on the second suction cup support and controlling the bag opening upper suction cup and the bag opening lower suction cup to lift, the third suction cup mounting plate arranged on the second suction cup support and the bag opening upper suction cups arranged on the third suction cup mounting plate, the motor mounting plate arranged on the frame, the rocker control motor arranged on the motor mounting plate, the rocker rotating shaft arranged on the motor mounting plate, the synchronous belt arranged between the rocker control motor and the rocker rotating shaft, the rocker support arranged on the rocker rotating shaft, the rocker guide rod arranged on the rocker support, the left rocker and the right rocker arranged on the rocker guide rod, the third cylinder arranged on the rocker support and controlling the left rocker to slide, the fourth cylinder arranged on the rocker support and controlling the right rocker to slide, the rocker position sensing limit stopper arranged on the motor mounting plate, the left bag opening plate and the right bag opening plate, the left bag clamping plate and the right bag clamping plate arranged on the left rocker and the right rocker respectively, and the sixth cylinder and the seventh cylinder controlling the left bag clamping plate and the right bag clamping plate to move.

[0009] Preferably, the weighing feeding device comprises the hopper support arranged on the frame, the hopper arranged on the hopper support, the hopper first opening and closing petals and the hopper second opening and closing petals arranged at the lower part of the hopper, the hopper opening and closing first control connecting rod arranged on the hopper support and controlling the hopper first opening and closing petals, the hopper opening and closing second control connecting rod arranged on the hopper support and controlling the hopper second opening and closing petals, the seventh cylinder arranged on the hopper support and controlling the hopper opening and closing first control connecting rod, the eighth cylinder arranged on the hopper support and controlling the hopper opening and closing second control connecting rod, the first stop block and the second stop block arranged on the hopper support, the weighing support plate arranged on the hopper support and the weighing module arranged on the weighing support plate.

[0010] The utility model has the following beneficial effects:

[0011] The packaging bag stack collecting cabinet is conveyed to a bag taking position by a packaging bag conveying trolley, a packaging bag is grabbed on the packaging bag stack by a bag taking suction cup and is horizontally moved to an opening bag position of a second suction cup mounting plate by a horizontal moving rodless air cylinder, the packaging bag is opened by an opening bag suction cup of the second suction cup mounting plate and the third suction cup mounting plate, the opening bag plate is inserted into the packaging bag opening by a motor driven rocker arm, the opening bag plate on the left and right rocker arms is opened again by the third air cylinder and the fourth air cylinder being simultaneously retracted, the bag opening is fixed by the fifth air cylinder and the sixth air cylinder being simultaneously extended and the bag clamping plate clamping the bag opening on both sides of the packaging bag, the packaging bag is sent to the hopper opening by the rocker arm control motor driven rocker arm, the material is conveyed into the hopper by the feeding mechanism, the seventh air cylinder and the eighth air cylinder extending to control the opening and closing of the hopper drive the connecting rod mechanism to realize the opening action of the hopper, the hopper is opened again to support the material bag, until the hopper outside closely fits the baffle on both sides of the hopper, so that the material bag is repositioned, meanwhile, the material in the hopper falls into the packaging bag, the material bag cylinder is retracted after the material falling is completed, the hopper is closed again, the clamping plate is opened for clamping the packaging bag, and the material bag can enter the conveying line below to continue to realize the sealing at the sealing device, so that the automatic feeding, weighing, bagging, opening and bagging are realized, and the packaging efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structure schematic view of the automatic weighing packaging machine.

[0013] Figure 2 It is a side view of the automatic weighing packaging machine.

[0014] Figure 3 It is a structure schematic view of the bag taking and opening mechanism of the automatic weighing packaging machine.

[0015] Figure 4 It is a front view of the bag opening mechanism of the automatic weighing packaging machine.

[0016] Figure 5 It is a side view of the weighing and feeding device of the automatic weighing packaging machine.

[0017] Figure 6 It is a structure schematic view of the feeding mechanism of the automatic weighing packaging machine.

[0018] Figure 7 It is a structure schematic view of the packaging bag stack.

[0019] Explanation of reference signs: 1, rack; 2, packaging bag conveying line; 3, bag taking mechanism; 4, bag opening mechanism; 5, weighing feeding device; 6, feeding mechanism; 21, packaging bag stack collecting cabinet; 22, first conveying trolley; 23, second conveying trolley; 24, third conveying trolley; 25, fourth conveying trolley; 26, detection sensor; 27, conveying belt; 28, trolley conveying line; 29, packaging bag stack; 31, first air cylinder; 32, bag taking suction cup; 33, suction cup vacuum measuring instrument; 34, transverse movement rodless air cylinder; 35, motor mounting plate; 36, rocker control motor; 361, synchronous belt; 362, rocker rotating shaft; 363, rocker position sensing stopper; 37, first suction cup support; 38, first suction cup mounting plate; 41, lower bag opening suction cup; 411, second suction cup mounting plate; 42, upper bag opening suction cup; 421, third suction cup mounting plate; 422, second air cylinder; 423, second suction cup support; 43, rocker support; 431, rocker guide rod; 44, left rocker; 441, left bag opening plate; 442, third air cylinder; 443, left bag clamping plate; 444, fifth air cylinder; 45, right rocker; 451, right bag opening plate; 452, fourth air cylinder; 453, right bag clamping plate; 454, sixth air cylinder; 51, weighing module; 511, weighing support plate; 52, hopper; 521, hopper support; 53, hopper opening and closing first connecting rod; 531, seventh air cylinder; 54, hopper opening and closing second connecting rod; 541, eighth air cylinder; 55, hopper first opening and closing petal; 56, hopper second opening and closing petal; 57, first baffle; 58, second baffle; 59, hopper feeding port; 61, feeding vibration table rack; 62, vibration generator; 63, feeding groove; 64, feeding groove feeding port; 65, feeding groove discharging port. DETAILED DESCRIPTION

[0020] The utility model will be further explained in connection with the drawings and specific embodiments.

[0021] Embodiment: as Figures 1 to 7 shown, an automatic weighing packaging machine provided by the utility model, including rack 1, packaging bag conveying line 2, feeding mechanism 6, bag taking mechanism 3, bag opening mechanism 4 and weighing feeding device 5 are set up on the rack.

[0022] As Figure 1 , 2As shown, the packaging bag conveying line 2 comprises a packaging bag stack collecting cabinet 21, a trolley conveying line 28 arranged on the machine frame 1 and controlling the left and right movement of the third conveying trolley 24, a first conveying trolley 22, a second conveying trolley 23, a third conveying trolley 24, a fourth conveying trolley 25 for conveying the packaging bag stack 29, a packaging bag detection sensor 26 arranged on each conveying trolley and a conveying belt 27. During the bag feeding process, the packaging bag loaded packaging bag stack 29 is conveyed from the first conveying trolley 22 in the packaging bag stack collecting cabinet 21 to the second conveying trolley 23, when there is no packaging bag stack 29 on the third conveying trolley 24, the packaging bag loaded packaging bag stack 29 is conveyed from the second conveying trolley 23 to the third conveying trolley 24, when the packaging bag detection sensor 26 arranged on the third conveying trolley 24 detects the packaging bag stack 29, the conveying belts 27 of the second conveying trolley 23 and the third conveying trolley 24 are stopped, at the same time, the packaging bag stack 29 reaches the bag taking position and waits for the grabbing of the bag taking suction cup 32; when the packaging bag on the packaging bag stack 29 is taken by the bag taking suction cup 32, the third conveying trolley 24 moves to the right along the trolley conveying line 28 to the front of the fourth conveying trolley 25, the empty packaging bag stack 29 returns to the packaging bag stack collecting cabinet 21 through the fourth conveying trolley 25 and waits for the second bag loading, at the same time, the third conveying trolley 24 moves to the left along the trolley conveying line 28 to the front of the second conveying trolley 23, thus the bag feeding action is completed.

[0023] As Figure 2 、 3As shown, the bag taking mechanism 3 comprises a horizontal moving rodless cylinder 34 arranged on the frame 1 and driving the first suction cup support 37 to move, the first suction cup support 37 arranged on the horizontal moving rodless cylinder 34, the suction cup vacuum gauge 33 arranged on the first suction cup support 37, the first cylinder 31 arranged on the first suction cup support 37 and controlling the first suction cup mounting plate 38 to move up and down, the first suction cup mounting plate 38 arranged on the piston rod of the first cylinder 31, and a plurality of bag taking suction cups 32 arranged on the first suction cup mounting plate 38. During the bag taking operation, the horizontal moving rodless cylinder 34 drives the first suction cup support 37 to move horizontally, and when the horizontal moving rodless cylinder 34 reaches the right limit position, it stops moving, and at the same time, the bag taking suction cup 32 reaches above the packaging bag stack 29 (i.e. the bag taking position); then the first cylinder 31 works and drives the first suction cup mounting plate 37 and the bag taking suction cup 32 arranged on the piston rod of the first cylinder 31 to move downward, and when the bag taking suction cup 32 contacts the packaging bag, it starts to suck the vacuum, and when the suction cup vacuum gauge 33 detects that the vacuum degree of the bag taking suction cup 32 meets the condition, the first cylinder 31 retracts to move upward; subsequently, the horizontal moving rodless cylinder 34 drives the first suction cup support 37 to move horizontally again, and when the horizontal moving rodless cylinder 34 reaches the left limit position, it stops moving, and the bag taking suction cup 32 reaches above the bag opening lower suction cup 41, the first cylinder 31 extends to move downward, the bag taking suction cup 32 places the packaging bag on the bag opening lower suction cup mounting plate 411 at the bag opening position and releases the vacuum, then the first cylinder 31 retracts, the bag taking suction cup 32 moves upward and returns to the bag taking position with the first suction cup support 37 driven by the horizontal moving rodless cylinder 34, and thus the bag taking action is completed.

[0024] As Figures 3 to 5As shown, the bag opening mechanism 4 comprises a second suction cup mounting plate 411 arranged on the frame 1, a plurality of bag opening lower suction cups 41 arranged on the second suction cup mounting plate 411, a motor mounting plate 35 arranged on the frame 1, a second suction cup support 423 arranged on the motor mounting plate 35, a second air cylinder 422 arranged on the second suction cup support 423 and controlling the lifting of the bag opening upper suction cups 42 and the bag opening lower suction cups 41, a third suction cup mounting plate 421 arranged on the second suction cup support 423, a plurality of bag opening upper suction cups 42 arranged on the third suction cup mounting plate 421; a rocker control motor 36 arranged on the motor mounting plate 35, a rocker rotating shaft 362 arranged on the motor mounting plate 35, a synchronous belt 361 arranged between the rocker control motor 36 and the rocker rotating shaft 362, a rocker support 43 arranged on the rocker rotating shaft 362, a rocker guide rod 431 arranged on the rocker support 43, a left rocker 44 and a right rocker 45 arranged on the rocker guide rod 431, a third air cylinder 442 arranged on the rocker support 43 for controlling the sliding of the left rocker 44, a fourth air cylinder 452 arranged on the rocker support 43 for controlling the sliding of the right rocker 45, a rocker position sensing stopper 363 arranged on the motor mounting plate 35, a left bag opening plate 441 and a right bag opening plate 451, a left bag clamping plate 443 and a right bag clamping plate 453 arranged on the left rocker 44 and the right rocker 45 respectively, and a fifth air cylinder 444 and a sixth air cylinder 454 for controlling the movement of the left bag clamping plate 443 and the right bag clamping plate 453.In the opening bag working process, the second cylinder 422 starts to work and drives the opening bag upper suction disc 42 and the opening bag lower suction disc 41 arranged on the piston rod of the second cylinder 422 to be linked. After the opening bag upper suction disc and the opening bag lower suction disc contact the packaging bag, the opening bag upper suction disc 42 and the opening bag lower suction disc 41 start to vacuumize. After the vacuum degree detected by the vacuum measuring instrument 33 meets the condition, the second cylinder 422 retracts and moves upward. The opening bag upper suction disc 42 and the opening bag lower suction disc 41 are linked. The opening bag lower suction disc 41 moves downward, and the opening bag upper suction disc 42 moves upward, while the packaging bag opening is pulled open. After the opening is pulled open, the rocker control motor 36 starts to work. The synchronous belt 361 drives the rocker rotating shaft 362 to rotate reversely. The rocker rotating shaft 362 simultaneously drives the left rocker 44 and the right rocker 45 on the rocker support 43 to move downward. When the rocker position sensing stopper 363 senses that the rocker 44 reaches the left limit position, the rocker control motor 36 stops working. The left opening bag plate 441 and the right opening bag plate 451 are inserted into the packaging bag opening. Then, the third cylinder 442 and the fourth cylinder 452 simultaneously retract and drive the left rocker 44 and the right rocker 45 to move along the rocker guide rod 431 to the end of the rocker guide rod 431, respectively. After the left rocker 44 and the right rocker 45 reach the end of the rocker guide rod 431, the left opening bag plate 441 and the right opening bag plate 451 further open the packaging bag. Then, the fifth cylinder 444 and the sixth cylinder 454 act and drive the left bag clamping plate 443 and the right bag clamping plate 453 to clamp the packaging bag opening on the side of the opening bag upper suction disc 42, respectively, to realize clamping and fixing the two opening sides of the packaging bag. After the packaging bag is clamped and fixed, the second cylinder 422 starts to work and drives the opening bag upper suction disc 42 and the opening bag lower suction disc 41 arranged on the piston rod of the second cylinder 422 to return to the initial position. After the opening bag upper suction disc 42 and the opening bag lower suction disc 41 return to the position, the rocker control motor 36 acts again. The synchronous belt 361 drives the rocker rotating shaft 362 to rotate forward. The rocker rotating shaft 362 simultaneously drives the left rocker 44 and the right rocker 45 on the rocker support 43 to move upward and move the packaging bag to the position below the hopper 52. When the rocker position sensing stopper 363 senses that the left rocker 44 and the right rocker 45 reach the right limit position, the rocker control motor 36 stops working. At the same time, the left rocker 44 and the right rocker 45 drive the packaging bag to sleeve the hopper first opening and closing petals 55 and the hopper second opening and closing petals 56 on the upper part of the packaging bag.

[0025] As Figure 5 , 6As shown, the feeding mechanism 6 comprises a feeding vibration table frame 61, a vibration generator 62 arranged on the feeding vibration table frame 61, a feeding chute 63 arranged on the vibration generator 62 and used for conveying the packaging materials, a feeding chute feeding port 64 connected with an external feeding system, and a feeding chute discharging port 65 arranged directly above the hopper feeding port 59. The weighing feeding device 5 comprises a hopper support 521 arranged on the frame 1, a hopper 52 arranged on the hopper support 521, a hopper first opening and closing flap 55 and a hopper second opening and closing flap 56 arranged at the lower part of the hopper 52, a hopper opening and closing first control connecting rod 53 arranged on the hopper support 521 and used for controlling the hopper first opening and closing flap 55, a hopper opening and closing second control connecting rod 54 arranged on the hopper support 521 and used for controlling the hopper second opening and closing flap 56, a seventh cylinder 531 arranged on the hopper support 521 and used for controlling the hopper opening and closing first control connecting rod 53, an eighth cylinder 541 arranged on the hopper support 521 and used for controlling the hopper opening and closing second control connecting rod 54, a first stop block 57 and a second stop block 58 arranged on the hopper support 521, a weighing support plate 511 arranged on the hopper support 521, and a weighing module 51 arranged on the weighing support plate 511.During the charging work, after the packaging bag is sleeved into the first opening and closing petals 55 of the hopper and the second opening and closing petals 56 of the hopper, the external feeding system starts feeding the feeding mechanism 6, the polysilicon block is fed into the feeding groove 63 from the feeding groove feeding port 64, and at the same time, the vibration generator 62 starts working to feed the polysilicon block in the feeding groove 63 into the hopper feeding port 59 from the feeding groove discharge port 65 and fall into the hopper 52; when the weighing module 51 arranged on the weighing support plate 511 detects that the weight of the feeding reaches the preset value, the external feeding system and the vibration generator 62 stop working, and then the seventh cylinder 531 and the eighth cylinder 541 arranged on the hopper support plate extend the piston rods, drive the first hopper opening and closing connecting rod 53 and the second hopper opening and closing connecting rod 54 to move respectively, pull the first hopper opening and closing petals 55 and the second hopper opening and closing petals 56 to rotate upward to realize the opening of the lower part of the hopper 52, and at the same time, the first hopper opening and closing petals 55 and the second hopper opening and closing petals 56 are opened again to support the packaging bag until the first baffle 57 and the second baffle 58 on the two sides of the hopper are tightly fitted to realize the secondary positioning of the packaging bag, and at the same time, the upper part of the packaging bag forms a “bell mouth” to ensure that the falling speed of the block is slowed down during the falling of the block into the packaging bag, so that the polysilicon block is prevented from being broken due to collision; after the feeding is completed, the piston rods of the seventh cylinder 531 and the eighth cylinder 541 are retracted to drive the first hopper opening and closing connecting rod 53 and the second hopper opening and closing connecting rod 54 to move, and pull the first hopper opening and closing petals 55 and the second hopper opening and closing petals 56 to rotate downward to realize the reclosing of the lower part of the hopper 52; then, the third cylinder 442 and the fourth cylinder 452 simultaneously extend the piston rods, drive the left rocker arm 44 and the right rocker arm 45 to move along the rocker arm guide rod 431 to the center of the rocker arm guide rod 431 respectively, and at the same time, the fifth cylinder 444 and the sixth cylinder 454 move to drive the left bag clamping plate 443 and the right bag clamping plate 453 to recover and loosen the openings on the two sides of the packaging bag, the packaging bag containing the polysilicon block falls into the lower conveying line body to continue the other processes such as heat sealing, and thus the charging work is completed.

[0026] Those skilled in the art will appreciate that the embodiments described herein are presented for the purpose of helping the reader to understand the principles of the present application and should be understood as not limiting the protection scope of the present application to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations according to the technical inspirations disclosed in the present application without departing from the essence of the present application, and these modifications and combinations still fall within the protection scope of the present application.

Claims

1. An automatic weighing and packaging machine, characterized in that: The machine comprises a frame (1), a bag taking mechanism (3) arranged on the frame (1) for taking a packaging bag, a bag opening mechanism (4) arranged on the frame (1) for opening the packaging bag and moving the packaging bag to below a hopper (52), a weighing feeder (5) arranged on the frame (1) for filling the packaging bag with a packing material, a feeding mechanism (6) for feeding the packing material into the hopper (52), and a packaging bag conveying line (2) for providing the bag taking mechanism (3) with the packaging bag.

2. An automatic weighing and packaging machine according to claim 1, characterized in that: The feeding mechanism (6) comprises a feeding vibration table frame (61), a vibration generator (62) arranged on the feeding vibration table frame (61), a feeding chute (63) arranged on the vibration generator (62) and conveying the packing material, a feeding chute feeding port (64) connected with an external feeding system, and a feeding chute discharging port (65) arranged directly above the hopper feeding port (59).

3. An automatic weighing and packaging machine according to claim 2, characterized in that: The packaging bag conveying line (2) comprises a packaging bag stack collecting cabinet (21), a packaging bag stack (29) for loading the packaging bag, a trolley conveying line (28) arranged on the frame (1) and controlling the left and right movement of a third conveying trolley (24), a first conveying trolley (22), a second conveying trolley (23), a third conveying trolley (24), a fourth conveying trolley (25), a packaging bag detection sensor (26) arranged on each conveying trolley, and a conveying belt (27).

4. An automatic weighing and packaging machine according to claim 2, characterized in that: The bag taking mechanism (3) comprises a horizontal movement rodless cylinder (34) arranged on the frame (1) and driving the first suction disc support (37) to move, the first suction disc support (37) arranged on the horizontal movement rodless cylinder (34), a suction disc vacuum meter (33) arranged on the first suction disc support (37), a first cylinder (31) arranged on the first suction disc support (37) and controlling the first suction disc mounting plate (38) to move up and down, the first suction disc mounting plate (38) arranged on the piston rod of the first cylinder (31), and a plurality of bag taking suction discs (32) arranged on the first suction disc mounting plate.

5. An automatic weighing and packaging machine according to claim 2, characterized in that: The bag opening mechanism (4) comprises a second suction disc mounting plate (411) arranged on the rack (1), a plurality of bag opening lower suction discs (41) arranged on the second suction disc mounting plate (411), a motor mounting plate (35) arranged on the rack (1), a second suction disc support (423) arranged on the motor mounting plate (35), a second cylinder (422) arranged on the second suction disc support (423) and controlling the lifting of the bag opening upper suction disc (42) and the bag opening lower suction disc (41), a third suction disc mounting plate (421) arranged on the second suction disc support (423), a plurality of bag opening upper suction discs (42) arranged on the third suction disc mounting plate (421); a rocker control motor (36) arranged on the motor mounting plate (35), a rocker rotating shaft (362) arranged on the motor mounting plate (35), a synchronous belt (361) arranged between the rocker control motor (36) and the rocker rotating shaft (362), a rocker support (43) arranged on the rocker rotating shaft (362), a rocker guide rod (431) arranged on the rocker support (43), a left rocker (44) and a right rocker (45) arranged on the rocker guide rod (431), a third cylinder (442) arranged on the rocker support (43) for controlling the sliding of the left rocker (44), a fourth cylinder (452) arranged on the rocker support (43) for controlling the sliding of the right rocker (45), a rocker position sensing stopper (363) arranged on the motor mounting plate (35), a left bag opening plate (441) and a right bag opening plate (451), a left bag clamping plate (443) and a right bag clamping plate (453) arranged on the left rocker (44) and the right rocker (45) respectively, and a fifth cylinder (444) and a sixth cylinder (454) for controlling the movement of the left bag clamping plate (443) and the right bag clamping plate (453).

6. An automatic weighing and packaging machine according to claim 2, characterized in that: The weighing feeding device (5) comprises a hopper support (521) arranged on the rack (1), a hopper (52) arranged on the hopper support (521), a hopper first opening and closing flap (55) and a hopper second opening and closing flap (56) arranged at the lower part of the hopper (52), a hopper opening and closing first connecting rod (53) arranged on the hopper support (521) and controlling the hopper first opening and closing flap (55), a hopper opening and closing second connecting rod (54) arranged on the hopper support (521) and controlling the hopper second opening and closing flap (56), a seventh cylinder (531) arranged on the hopper support (521) and controlling the hopper opening and closing first connecting rod (53), an eighth cylinder (541) arranged on the hopper support (521) and controlling the hopper opening and closing second connecting rod (54), a first stop block (57) and a second stop block (58) arranged on the hopper support (521), a weighing support plate (511) arranged on the hopper support (521), and a weighing module (51) arranged on the weighing support plate (511).

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