TWI877914B - Folding device for different folding packaging of plastic bags - Google Patents

Abstract

A folding device for folding plastic bags in different ways is provided. The frame includes at least one bag receiving platform. After the bag to be packaged is loaded, a bag clamping and transferring unit pulls the bag from the bag receiving platform to about half of the bag length and releases it, so that the clamped end of the bag falls downward to form a first fold on the bag receiving platform. The bag clamping and transferring unit then clamps the first fold and directly transfers it to a bag transfer and packaging unit, or transfers it to a turning platform to turn the folded bag 90 degrees and then transfer it to the bag transfer and packaging unit. or the bag clamping and transferring unit clamps and pulls the bag from the bag receiving table to about two-thirds of the bag length and releases it to form the first fold. The bag clamping and transferring unit clamps and completes the first fold of the bag and transfers it backward to the turning table. A second folding plate folds the tail of the bag toward the first folding point, and then turns the bag 90 degrees and transfers it to the bag transfer and packaging unit for packaging. This provides a variety of folding shapes, whether to turn the bag into the bag, and other packaging methods.

Description

Folding device for plastic bag packaging with different folding styles

The present invention involves a process of forming a first fold of a half or two folds by clamping and pulling bags of different lengths, and then clamping the first fold and transferring the bags to a turning table to make a 90-degree turn, or performing a second fold on the turning table and then turning the bags 90 degrees. The turned bags are then clamped and transferred to a bag transfer and packaging unit to perform packaging operations on the folded bags.

Regarding the invention patent No. 108131607 "Improvement of Automatic Bag Making and Packaging Device" previously applied by the applicant, it not only uses a bag making and sleeve transfer device to make the bag material into a packaging bag, and then sends it to a bag transfer and packaging device to put the bag to be packaged into the packaging bag, then the finished bag is clamped together with the packaging bag by the clamping claws on the finished product transfer device to the compacting and sealing device to squeeze out the air in the packaging bag and seal the packaging bag.

The bags to be packaged mentioned above, in addition to waiting to be clamped by the bag transfer unit at the bag guide positioning device, are transferred to the transfer rack and then pressed by the bag pressing rack, and are moved upward to the position to be bagged and packaged, and the aforementioned bagging and packaging operations are performed.

In the packaging process disclosed above, the bags to be packaged are flat and not folded. If it is a small bag, there will be no problem in packaging. However, if it is a larger bag or a larger bag, not only will it be difficult to pack it, but the folded bag will also cause trouble or difficulty in stacking and sorting due to its large area and softness.

Therefore, in order to improve the difficulty in packaging and stacking caused by the aforementioned known bags to be packaged without folding to reduce the area, the present invention provides a second folding plate and a turning table, so that the bags that are only folded in half can be packaged after turning, or the bags that are turned after the second folding can be packaged, so that the large bags to be packaged can be folded in half or folded in two to reduce the overall width and area of the package, so as to facilitate the convenience of bagging and stacking.

The technical solution adopted by the present invention to solve the technical problem is: comprising a bag receiving platform, a turning platform, a second folding plate located on the side of the bag receiving platform and adjacent to the turning platform, a bag transfer and packaging unit, and a bag clamping and transferring unit reciprocating between the bag receiving platform and the bag transfer and packaging unit, wherein the bag clamping and transferring unit is provided with at least a clamping claw and a retractable bag pressing rod that can be raised and lowered, the turning platform can be raised and lowered and rotated back and forth 90 degrees, and the second folding plate can be raised and extended above the turning platform, and retracted from the turning platform.

In the above scheme, an auxiliary bag receiving plate that can be raised to the bag receiving platform is provided between the bag receiving platform and the turning platform and below the bag receiving platform.

In the above scheme, a gear is fixed under the turning platform and the rotating shaft is arranged on a base fixed on a pair of lifting seats. A gear driven back and forth by a cylinder is installed on the base, and the gear is engaged with the gear.

In the above scheme, the turning platform is driven by the auxiliary lifting seat to rise and fall, and the auxiliary lifting seat and the turning platform are driven by a main lifting seat to rise and fall.

In the above scheme, a bag pressing lifting seat is provided on the frame above the turning table for lifting, and a bag pressing rotating block is provided on the bag pressing lifting seat for lifting.

In the above scheme, a bag pressing element that can be lifted and lowered independently is provided on one side of the bag pressing lifting seat.

In the above scheme, the second folding plate is driven by a cylinder to rise and fall, and the cylinder is fixed on a slide that can move back and forth between the turning platform and the bag receiving platform.

In the above scheme, the bag clamping and transferring unit includes a bag clamping slide that moves back and forth between the bag receiving platform and the bag transferring and packaging unit. A clamping claw is provided on the bag clamping slide for lifting and lowering, and a retractable bag pressing rod is provided on both sides of the clamping claw.

Therefore, through the above-mentioned turning table and the second folding plate of the present invention, the bag clamping and transferring unit clamps and folds the bag on the bag receiving table to form the first fold, and then transfers it to the turning table for a 90-degree turn, or the second folding plate performs the second fold on the turning table and then performs a 90-degree turn to complete the folding of the bag in half or the stacking of the two folds, so that the bag with a reduced area after folding can be easily carried out for subsequent packaging operations and stacking operations after packaging.

1: Rack

10: Guide rod

2: Bag receiving platform

21: Lifting bag screen

22: Lifting bag pressing rod

3: Bag transfer unit

31: Bag holder slide

32: Clamping claws

33: Telescopic bag pressing rod

4: Bag transfer and packaging unit

41: Lifting bag holder

411: Bag retainer

412: Rear baffle

42: Lifting bag pressing rack

43: Support rod

44: Rotary bag pressing rod

5: Turntable

50: Base

51: Auxiliary lifting seat

52: Main lift seat

53: Tooth

54: Gear

55: Lifting and lowering bag rotating block

56: Bag pressing element

57: Bag pressing lifting seat

6: Second folding plate

61: Sliding seat

62: Positioning stop rod

7: Auxiliary bag plate

Figure 1 is a three-dimensional schematic diagram of the present invention.

Figure 2 is a schematic side cross-sectional view of the present invention.

Figure 3 is a three-dimensional schematic diagram of the bag receiving platform of the present invention.

Figure 4 is a three-dimensional schematic diagram of the auxiliary bag-bearing plate of the present invention.

Figure 5 is a three-dimensional schematic diagram of the bag-carrying transfer unit of the present invention.

Figure 6 is a three-dimensional schematic diagram of the turning platform of the present invention.

Figure 7 is a front-view stereoscopic exploded schematic diagram of the turning platform of the present invention.

Figure 8 is a schematic diagram of the turning platform of the present invention viewed from above.

Figure 9 is a three-dimensional schematic diagram of the turning platform of the present invention after turning.

Figure 10 is a front view of the second folding plate of the present invention.

Figure 11 is a three-dimensional schematic diagram of the bag transfer packaging unit of the present invention.

Figure 12 is a schematic diagram of the present invention when the bag to be packaged is placed on the bag receiving table.

Figure 13 is a schematic diagram of the lifting bag barrier of the present invention when it rises and clamps the bag.

Figure 14 is a schematic diagram of the bag of the present invention being moved to the bag transfer and packaging unit.

Figure 15 is a schematic diagram of the bag of the present invention after being placed on the lifting bag support.

Figure 16 is a schematic diagram of the present invention when the rotary bag pressing rod is reset and the lifting bag pressing frame is lowered to clamp the bag.

Figure 17 is a schematic diagram of the present invention's lifting bag-carrying frame and the lifting bag-pressing frame rising to the pre-packaging position.

Figure 18 is a schematic diagram of the bag of the present invention when it is pulled out from the bag receiving platform to about half of its length.

Figure 19 is a schematic diagram of the bag clamping and transferring unit of the present invention when releasing the bag and moving backward.

Figure 20 is a schematic diagram of the present invention when the bag-folding transfer unit moves forward to fold the bag in half.

Figure 21 is a schematic diagram of the present invention transferring the folded bag to the turning table.

Figure 22 is a schematic diagram of the bag clamping and transfer unit of the present invention releasing the bag and the second folding plate retreating.

Figure 23 is a schematic diagram of the turning platform of the present invention turning 90 degrees and clamping the bag again.

Figure 24 is a schematic diagram of the bag of the present invention after being pulled out from the bag receiving platform to about two-thirds of its length.

Figure 25 is a schematic diagram of the present invention when the bag-folding transfer unit moves forward to fold the bag for the first time.

Figure 26 is a schematic diagram of the present invention transferring the bag after the first fold to the turning table.

Figure 27 is a schematic diagram of the present invention after the turning platform is lowered and the second folding plate is raised.

Figure 28 is a schematic diagram of the bag clamping and transferring unit of the present invention moving forward and extending the retractable bag pressing rod above the turning table.

Figure 29 is a schematic diagram of the turning platform of the present invention rising and retracting the bag pressing rod to press the first fold of the bag.

Figure 30 is a schematic diagram of the second folding plate of the present invention after folding the tail section of the bag in.

Figure 31 is a schematic diagram of the bag-holding transfer unit and the second folding plate of the present invention after they have retracted.

Figure 32 is a schematic diagram of the bag being clamped again after the turning platform of the present invention turns 90 degrees.

Please refer to Figures 1 and 2. The present invention mainly comprises at least one bag receiving platform 2 on a frame 1. After the bag to be packaged is loaded, a bag clamping and transferring unit 3 directly clamps and transfers the bag from the bag receiving platform 2 to a bag transferring and packaging unit 4 for subsequent bagging and packaging operations, or after the bag is pulled out of the bag receiving platform 2 to a predetermined length for the first folding position, the bag clamping and transferring unit 3 folds the bag from the bag receiving platform 2 to a first fold, and then transfers the folded bag to a turning platform 5. If the first fold of the bag is a fold in half, the turning table 5 turns 90 degrees through the preset control. If the first fold of the bag is the first fold of two folds, the tail of the bag is first folded onto the first fold through a second folding plate 6, and then the turning table 5 turns 90 degrees through the preset control, so that the short side of the bag turns to the direction of bagging and packaging, and then the bag clamping transfer unit 3 transfers the folded bag to the bag transfer and packaging unit 4 for subsequent bagging and packaging operations.

The aforementioned bag receiving platform 2 is arranged at the front side of the frame 1 to receive and place the bags to be packaged. The bag transfer and packaging unit 4 is installed at the rear side of the frame 1. A turning platform 5 and the bag clamping and transferring unit 3 are arranged between the bag receiving platform 2 and the bag transfer and packaging unit 4, and the bag clamping and transferring unit 3 reciprocates between them along the guide rod 10 arranged on the frame 1. At the same time, between the bag receiving platform 2 and the turning platform 5, there are respectively arranged an auxiliary bag receiving plate 7 adjacent to the side and below of the bag receiving platform 2 and a second folding plate 6 adjacent to the side of the turning platform 5 and can be raised to extend above the turning platform 5 or lowered to retreat from the side of the turning platform 5.

The bag receiving platform 2 mentioned above is shown in FIG. 3. The bag receiving platform 2 is fixed on the frame 1. A lifting bag pressing rod 22 and a lifting bag blocking fence 21 are provided from the outside to the inside on the frame 1 corresponding to the upper part. When the bag is placed on the bag receiving platform 2, it is blocked and stopped by the descending lifting bag blocking fence 21. The descending lifting bag pressing rod 22 can be used to press the bag on the bag receiving platform 2.

As shown in FIG. 5 , the bag clamping and transferring unit 3 mentioned above includes a bag clamping slide 31 that reciprocates along the guide rod 10 between the bag receiving platform 2 and the bag transferring and packaging unit 4. The bag clamping slide 31 is provided with at least one clamping claw 32 that can be raised and lowered by a cylinder, and a retractable bag pressing rod 33 that can be extended and retracted by a cylinder is provided on both sides of the clamping claw 32.

As shown in FIG. 6 , the aforementioned turning platform 5 includes a sub-lifting seat 51 which is installed on a cylinder driven to rise and fall, and the cylinder is fixed on a main lifting seat 52. The main lifting seat 52 is driven by another cylinder fixed on the frame 1 to perform a lifting action, that is, the sub-lifting seat 51 can be lifted and lowered by the main lifting seat 52, and the sub-lifting seat 51 can also be lifted and lowered independently, and the main lifting seat 52 is preset to maintain a state of descending to a predetermined position, while the sub-lifting seat 51 is preset to maintain a state of rising to a predetermined position; at the same time, the turning platform 5 is installed on the sub-lifting seat 51 through a base 50, and a gear 54 is fixed below the turning platform 5 as shown in FIGS. 7 and 8 to The rotating shaft is arranged on the base 50, and a gear 53 driven by a cylinder is arranged on the base 50, so that the gear 54 and the gear 53 are engaged with each other, and then the gear 53 driven by the reciprocating action drives the turning table 5 to rotate and position back and forth 90 degrees through the gear 54 (as shown in Figure 9); in addition, as shown in Figure 6, a bag pressing lifting seat 57 driven by a cylinder is arranged on the frame 1 above the turning table 5, and the bag pressing lifting seat 57 is further provided with a bag pressing rotating block 55 driven by another cylinder to be lifted and lowered and freely rotated, and a bag pressing element 56 is arranged which is lifted and lowered along with the bag pressing lifting seat 57 and is driven by another cylinder to be lifted and lowered independently.

As shown in FIG. 10, the second folding plate 6 mentioned above is mounted on the frame 1 and is mounted on a slide 61 that slides back and forth. The second folding plate 6 is driven by the cylinder mounted on the slide 61 to move up and down. At the same time, the slide 61 is driven by the cylinder mounted on the frame 1 to slide back and forth between the bag receiving platform 2 and the turning platform 5. Secondly, at least one retractable positioning stop rod 62 is provided at the corresponding position of the slide 61 on the frame 1 below the bag receiving platform 2, so that the positioning stop rod 62 can stop the slide 61 at the position where the second folding plate 6 is ready to perform the second fold, and at the position where it retreats from the vicinity of the turning platform 5 and approaches the bag receiving platform 2.

As shown in Figure 4, the auxiliary bag-carrying plate 7 mentioned above is driven by a cylinder on a frame 1, and can rise to the same height as the bag-carrying table 2 and stop, or when it falls to the lowest point, it can be used for the device of the second folding plate 6 that withdraws from the turning table 5 to withdraw to the upper part of the auxiliary bag-carrying plate 7.

The aforementioned bag transfer and packaging unit 4, as shown in FIG. 11, includes a lifting bag support frame 41 which is driven by a cylinder on the frame 1 and can be raised to a position for preparing packaging. The lifting bag support frame 41 is provided with two opposite bag support baffles 411 which can be adjusted in width to the left and right (adjusted according to the width of the bag to be packaged or the package after folding), and a rear bag baffle 412 which can be adjusted in position to the front and back (adjusted according to the length of the bag to be packaged or the package after folding); a lifting bag support frame 41 is provided on the frame 1 above the corresponding position of the lifting bag support frame 41. The cylinder on the frame 1 drives the lifting bag holding frame 41 to descend to the lifting bag holding frame 41 and can rise with the lifting bag holding frame 41. On the frame 1 below the corresponding position of the lifting bag holding frame 41, there is a support rod 43 driven by the cylinder on the frame 1 to be lifted and supported below the lifting bag holding frame 41. In addition, on the frame 1 adjacent to the lifting bag holding frame 41, there is a rotating bag pressing rod 44 driven by the cylinder to rotate and rise, and the rotating bag pressing rod 44 can rotate and press above the lifting bag holding frame 41.

Therefore, when the bag is not to be folded and is directly packaged, as shown in FIG. 12, the bag is transported to the bag receiving platform 2, and is stopped by the descending lifting bag blocking fence 21. Then, as shown in FIG. 13, the bag clamping and transferring unit 3 moves forward and the bag is clamped by the clamping claw 32. The lifting bag blocking fence 21 rises and returns to its original position as shown in FIG. 24. Then, as shown in FIG. 14, the clamped bag is directly transferred backward to the bag transfer bag by the bag clamping and transferring unit 3. The bag is placed on the lifting bag frame 41 of the loading unit 4, and the bag is released as shown in Figure 15 and placed flat on the lifting bag frame 41, and the bag clamping and transferring unit 3 is moved backward. At the same time, the rotary bag pressing rod 44 is rotated above the lifting bag frame 41 and lowered to press the bag. Then, the clamping claw 32 is raised to the position, and the bag clamping and transferring unit 3 is moved forward back to the predetermined bag clamping position on the bag receiving platform 2 (as shown in Figure 2).

At this time, as shown in FIG. 16, the rotary bag pressing rod 44 will also rise and rotate back to its original position, and the lifting bag pressing frame 42 at the bag transfer and packaging unit 4 will descend to the lifting bag holding frame 41 to clamp the bag, and then as shown in FIG. 17, the lifting bag pressing frame 42 and the lifting bag holding frame 41 will move the clamped bag upward together, and stop after the bag is moved to the position where packaging is to be performed. At the same time, the support rod 43 is also supported at the bottom of the lifting bag holding frame 41; at this time, as shown in the applicant's No. 10813160 The bag making and sleeve transfer device shown in the invention patent No. 7 "Improvement of automatic bag making and packaging device" (previous case) puts the prepared packaging bag into the bag on the lifting bag receiving frame 41 after the support rod 43 is lowered, and then the finished product transfer device in the previous case clamps the bag after entering the bag together with the seal and the rear belt to release the finished product after packaging. After the bag is clamped out of the lifting bag receiving frame 41, the lifting bag receiving frame 41, the lifting bag pressing frame 42 and the support rod 43 will return to the original position as shown in Figure 2.

If the bag is to be folded in half, as shown in FIG. 18, the bag clamping and transferring unit 3 pulls the bag out of the bag receiving platform 2 to about half of the bag length, and at the same time, the auxiliary bag receiving plate 7 is also raised to support the pulled bag, and the lifting and pressing bag rod 22 is lowered to press the bag on the bag receiving platform 2. Then, as shown in FIG. 19, the bag clamping and transferring unit 3 releases the bag and moves backward, and at the same time, the auxiliary bag receiving plate 7 is also lowered back to its original position, so that the pulled end of the bag hangs down, and then The bag clamping and transferring unit 3 is moved forward to the bag receiving platform 2 again as shown in FIG. 20 to clamp and fold the bag into the first fold (i.e., fold it in half), and then the lifting and pressing bag rod 22 is raised to its original position, and the bag clamping and transferring unit 3 can directly transfer the folded bag to the aforementioned bag transfer and packaging unit 4 for packaging (as shown in FIGS. 14 to 17), or as shown in FIG. 21, the folded bag is transferred to the positioning position on the turning platform 5, and then the turning platform 5 is moved from the main lifting seat 5 to the turning platform 5. 2 is driven to rise to the position, and the folded bag is pressed on the turning table 5 by the descending of the bag pressing lifting seat 57 and the downward extension of the lifting bag pressing rotating block 55. Then, as shown in FIG. 22, the bag clamping and transferring unit 3 releases the bag and retreats, and the second folding plate 6 also retreats to the position above the auxiliary bag holding plate 7. Then, as shown in FIG. 23, the turning table 5 is rotated 90 degrees to position, and the lifting bag pressing element 56 presses the bag to be clamped, and then the bag clamping and transferring unit is The unit 3 moves forward and the clamping claw 32 on it clamps the bag again, and then the bag pressing lifting seat 57 and the lifting bag pressing rotating block 55 and the lifting bag pressing element 56 on it rise and return to their original positions. At this time, the bag clamping transfer unit 3 can transfer the folded bag to the aforementioned bag transfer and packaging unit 4 for packaging (as shown in Figures 14 to 17). At the same time, as shown in Figure 2, the turning table 5 is turned back and lowered to its original position, and the second folding plate 6 is moved back to the vicinity of the turning table 5.

If the bag is to be folded twice before packaging, as shown in Figure 24, the bag clamping and transferring unit 3 pulls the bag from the bag receiving platform 2 to about two-thirds of the bag's length, and the lifting and pressing bag rod 22 is lowered to press the bag on the bag receiving platform 2. At the same time, the auxiliary bag receiving plate 7 is raised to support the part where the bag is pulled out. Then the bag clamping and transferring unit 3 releases the bag and retreats. At this time, the auxiliary bag receiving plate 7 will also descend back to its original position, allowing the end of the bag originally clamped to descend. Then, as shown in Figure 25, the bag clamping and transferring unit 3 advances to the bag receiving platform 2 and uses the clamping claws 32 thereon to pull the bag. The bag is clamped on the bag receiving platform 2 and folded into the first fold. Then, as shown in FIG. 26, the bag clamping and transferring unit 3 is transferred backward to the turning platform 5. The turning platform 5 is driven by the main lifting seat 52 to rise to a fixed position. Then, as shown in FIG. 27, the bag clamping and transferring unit 3 releases the bag and retreats. The second folding plate 6 is driven to rise, and the tail of the bag is slightly moved upward. At the same time, the turning platform 5 also sinks under the driving of the main lifting seat 52 and the auxiliary lifting seat 51. The lifting bag pressing rotating block 55 also extends downward with the sinking of the turning platform 5 to keep the bag pressed.

Then, as shown in FIG. 28, the bag clamping transfer unit 3 moves slightly forward to the side adjacent to the turning table, and the retractable bag pressing rod 33 on it is extended to the top of the turning table 5. At this time, the turning table 5 is also raised only by the main lifting seat 52 as shown in FIG. 29, and the bag is pressed on the turning table 5 by the retractable bag pressing rod 33, and the lifting bag pressing rotating block 55 is also raised separately. Then, as shown in FIG. 30, the slide 61 is driven to slide toward the turning table 5 to drive the first The second folding plate 6 folds the tail section of the bag from the second folding plate 6 above the first folding of the bag. After the second folding of the bag is completed, as shown in Figure 31, the lifting bag pressing rotating block 55 extends downward again to press the bag on the turning table 5, and then the bag clamping transfer unit 3 retreats, and the telescopic bag pressing rod 33 also retreats back. At the same time, the second folding plate 6 is also driven by the slide 61 to the bag receiving table 2, and the second folding plate 6 will also move down to its original position.

At this moment, as shown in FIG. 32, the turning platform 5 rotates 90 degrees and is lifted to a fixed position by the auxiliary lifting seat 51. The lifting and pressing bag rotating block 55 also rotates and rises accordingly. At the same time, the pressing bag element 56 provided on the pressing bag lifting seat 57 also descends to the position where the bag is to be clamped and clamps it. Then, the bag clamping transfer unit 3 moves to the turning platform 5 and causes the clamping claws 32 thereon to clamp the bag after folding and turning. Then, the lifting and pressing bag rotating block 55 and the pressing bag element 56 are lifted and lowered. When the bag pressing lifting seat 57 rises and returns to its original position, the bag clamping and transferring unit 3 clamps and transfers the bag backward to the bag transferring and packaging unit 4 for the packaging operation as described above (as shown in Figures 14 to 17, no further description is given). At this time, the turning table 5 that has been turned and the second folding plate 6 that has retreated to the side of the bag receiving table 2, as shown in Figure 2 and described above, are lowered and moved back to the original position, waiting for the execution of the next operation.

Therefore, the present invention can not only perform packaging of folded bags, but also perform packaging by folding in half or twice according to the size and length of the bag, and can also select whether the packaged bag needs to be turned into a bag for packaging, providing a variety of bag folding shapes, turning into a bag or not, and other different packaging methods, achieving a full-function packaging device with multiple uses in one machine.

1: Rack

10: Guide rod

2: Bag receiving platform

21: Lifting bag screen

22: Lifting bag pressing rod

3: Bag transfer unit

31: Bag holder slide

32: Clamping claws

33: Telescopic bag pressing rod

4: Bag transfer and packaging unit

41: Lifting bag holder

42: Lifting bag pressing rack

43: Support rod

44: Rotary bag pressing rod

5: Turntable

50: Base

51: Auxiliary lifting seat

52: Main lift seat

55: Lifting and lowering bag rotating block

56: Bag pressing element

57: Bag pressing lifting seat

6: Second folding plate

61: Sliding seat

62: Positioning stop rod

7: Auxiliary bag plate

Claims (8)

A folding device for folding plastic bags in different ways, comprising a bag receiving platform, a turning platform and a bag transfer packaging unit arranged in sequence on a frame, a second folding plate is arranged between the bag receiving platform and the turning platform, and a bag clamping and transferring unit is arranged between the bag receiving platform and the bag transfer packaging unit, wherein: the bag clamping and transferring unit is provided with at least a clamping claw and a retractable bag pressing rod which can be raised and lowered; the turning platform can be raised and lowered and rotated back and forth 90 degrees; the second folding plate can be raised and then extended into the upper part of the turning platform, or lowered and then withdrawn from the turning platform. A folding device for folding plastic bags of different packaging as described in claim 1, wherein an auxiliary bag-holding plate is provided between the bag-holding platform and the turning platform and is lifted and lowered near the bag-holding platform. As described in claim 1, a folding device for folding plastic bags with different packaging, wherein a gear is fixed under the turning table and the rotating shaft is arranged on a base fixed on a pair of lifting seats, and a gear engaged with the gear and driven back and forth by a cylinder is installed on the base. A folding device for folding plastic bags in different packaging as described in claim 3, wherein the turning platform is driven to rise and fall on the auxiliary lifting seat, and the auxiliary lifting seat together with the turning platform is driven to rise and fall by a main lifting seat that is driven to rise and fall. As described in claim 1, the folding device for folding plastic bags with different packaging types, wherein a bag pressing lifting seat is provided on the frame above the turning table, and a bag pressing rotating block capable of lifting and lowering independently is provided on the bag pressing lifting seat. A folding device for folding plastic bags in different packaging modes as described in claim 5, wherein a bag pressing element that can be lifted and lowered independently is provided on one side of the bag pressing lifting seat. A folding device for folding plastic bags in different packaging as described in claim 1, wherein the second folding plate is disposed on a slide that moves back and forth between the turning platform and the bag receiving platform, and the second folding plate can be mounted on the slide in a lifting manner. A folding device for folding plastic bags in different packaging modes as described in claim 1, wherein the bag clamping and transferring unit includes a bag clamping slide that moves back and forth between the bag receiving platform and the bag transferring and packaging unit, a clamping claw is provided on the bag clamping slide for lifting and lowering, and a retractable bag pressing rod is provided on both sides of the clamping claw.