Plastic bag folding and bundling equipment

Abstract

The invention discloses a plastic bag folding and bundling device, comprising a frame, on which are arranged: two grabbing and transferring mechanisms for grabbing and transferring plastic bags; a punching and cutting mechanism for punching and cutting two plastic bags at the same time; a handle folding mechanism for synchronously folding two handles of the plastic bag; a bag body folding mechanism for folding the bag body of the plastic bag, and can fold small-sized plastic bags; a lifting mechanism for grabbing and lifting the folded plastic bag; and a bundling mechanism for bundling the lifted plastic bag after expanding a rubber band, and can fold small-sized plastic bags, thereby improving the application range of the device, and can synchronously fold the two handles on the plastic bag, making the bag body folding simpler, thereby improving the folding efficiency, and can clamp the plastic bag before bundling, thereby improving the bundling effect.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic bag production, and more specifically relates to a plastic bag folding and bundling device. Background Art

[0002] In the production process of plastic bags, it is necessary to punch out handles, then fold the two handles, and then fold the bag body of the plastic bag. After folding, it is bundled by a bundling mechanism. However, the folding and bundling equipment in the prior art cannot fold small-sized plastic bags, the applicability of the equipment is poor, and the folding process of the handles and the bag body of the plastic bag is relatively complicated, and the folding efficiency is low. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a plastic bag folding and bundling device with high folding efficiency, good bundling effect and wide application range.

[0004] To achieve the above object, the present invention provides the following technical solution: a plastic bag folding and bundling device, comprising a frame, on which are provided:

[0005] Two grabbing and transferring mechanisms to grab and transfer plastic bags;

[0006] Punching and cutting mechanism can punch and cut two plastic bags at the same time;

[0007] The handle folding mechanism folds the two handles of the plastic bag synchronously;

[0008] The bag body folding mechanism folds the bag body of the plastic bag, and can fold small-sized plastic bags;

[0009] A lifting mechanism to grab and lift the folded plastic bag;

[0010] The strapping mechanism expands the rubber band and puts it on the lifted plastic bag for strapping.

[0011] Furthermore, the grabbing and transferring mechanism comprises a grabbing plate, on which a plurality of grabbing claws are arranged, and the grabbing plate is slidably connected to the frame.

[0012] Furthermore, the stamping and cutting mechanism includes a stamping bracket, two stamping mechanisms are arranged on the stamping bracket, two vertical and mutually parallel supporting base plates are arranged below the stamping bracket, a conveying plate is arranged on the supporting base plate, two stamping base plates corresponding to the stamping mechanisms are arranged on the conveying plate, and a reinforcing plate is arranged between the stamping bracket and the supporting base plate, and the reinforcing plate is located between the two stamping base plates.

[0013] Furthermore, the handle folding mechanism includes a liftable bag body placing plate and a synchronous folding mechanism, two retractable telescopic plates are arranged on the bag body placing plate, and the two side edges of the telescopic plates are oblique edges. A clamping mechanism is arranged above the bag body placing plate, and the synchronous folding mechanism includes a first folding plate and a second folding plate which can move synchronously toward each other or synchronously in opposite directions, the first folding plate is located above the second folding plate, and the first folding plate is located below the telescopic rod.

[0014] Furthermore, a rotatable shaft is provided on the frame, and support plates are provided on both sides of the telescopic plate, and the support plates are connected to the shaft.

[0015] Furthermore, the clamping mechanism includes a clamping bracket, on which a first clamping rod and a second clamping rod are provided. The first clamping rod is located above one end of the bag body placement plate close to the synchronous folding mechanism, and the second clamping rod is located on the side of the first clamping rod close to the synchronous folding mechanism.

[0016] Furthermore, the bag folding mechanism includes a first folding jaw mechanism and a second folding jaw mechanism, the first folding jaw mechanism includes a rotatable and slidable first folding rod, the first folding rod is provided with a first clamping plate and a second clamping plate parallel to each other, the second clamping plate is slidably connected to the first folding rod, the second folding jaw mechanism includes a rotatable second folding rod, the second folding rod is provided with a third clamping plate and a locking plate parallel to each other, the locking plate is slidably connected to the second folding rod.

[0017] Furthermore, the lifting mechanism includes a lifting manipulator located at the rear of the frame, the lifting manipulator is provided with a plurality of lifting claws, the lifting manipulator includes a rotatable lifting base, the lifting base is provided with a rotatable first lifting arm, the first lifting arm is provided with two rotatable second lifting arms, the second lifting arm is provided with a rotatable lifting bracket, and the lifting claws are connected to the lifting bracket.

[0018] Furthermore, the bundling mechanism includes a movable rubber band transfer frame, a rubber band grabbing mechanism and a rubber band expansion mechanism located on the frame, the rubber band grabbing mechanism includes a storage barrel, a rotatable rotating bracket, a lifting bracket lifted and connected to the rotating bracket, and two grabbing fingers located on the lifting bracket, and one of the grabbing fingers is provided with a vacuum adsorption hole, and the rubber band expansion mechanism includes two expansion components, the expansion component includes a first expansion plate and a second expansion plate, the first expansion plate and the second expansion plate can rotate synchronously towards each other or synchronously in opposite directions, and the first expansion plate and the second expansion plate are both provided with expansion rods.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. The two handles on the plastic bag can be folded synchronously through the handle folding mechanism, thereby improving the folding efficiency of the handles; 2. The bag body folding mechanism makes the folding process and mechanism of the bag body simpler, thereby improving the folding efficiency of the bag body, and at the same time, small-sized plastic bags can be folded, with a wide range of applications; 3. The plastic bag is clamped and lifted by the lifting mechanism and then tied by the bundling mechanism, thereby improving the bundling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the plastic bag folding and bundling device of the present invention;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of a grabbing and transferring mechanism and a punching and cutting mechanism in a plastic bag folding and bundling device;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of a handle folding mechanism in a plastic bag folding and bundling device;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of a bag folding mechanism in a plastic bag folding and bundling device;

[0024] Figure 5 It is a schematic diagram of the folding process of a plastic bag body;

[0025] Figure 6 It is a three-dimensional structural schematic diagram of a lifting mechanism and a strapping mechanism in a plastic bag folding and strapping device;

[0026] Figure 7 is a three-dimensional structural schematic diagram of the lifting mechanism and the strapping mechanism from another viewing angle;

[0027] Figure 8 for Figure 7 Enlarged view of part A in the middle;

[0028] Fig. 9 for Figure 7 Enlarged view of part B in the middle.

[0029] Figure numerals: 1. Grabbing and transferring mechanism; 11. Grabbing plate; 12. Grabbing clamp; 2. Punching and cutting mechanism; 21. Punching bracket; 22. Punching mechanism; 23. Support bottom plate; 24. Conveying plate; 25. Punching bottom plate; 26. Reinforcement plate; 3. Handle folding mechanism; 31. Bag body placement plate; 32. Telescopic plate; 33. First folding plate; 34. Second folding plate; 35. Rotating shaft; 36. Support plate; 37. Pressing bracket; 38. First pressing rod; 39. Second pressing rod; 4. Bag body folding mechanism; 41. First folding rod; 42 .First clamping plate; 43.Second clamping plate; 44.Second folding rod; 45.Third clamping plate; 46.Locking plate; 5.Lifting mechanism; 51.Lifting claw; 52.Lifting base; 53.First lifting arm; 54.Second lifting arm; 55.Lifting bracket; 6.Bundling mechanism; 61.Rubber band transfer frame; 62.Storage barrel; 63.Rotating bracket; 64.Lifting bracket; 65.Grabbing finger; 66.Vacuum adsorption hole; 67.First expansion plate; 68.Second expansion plate; 69.Expansion rod; 7.Scrap conveyor belt; 8.Frame; 9.Exchange slot. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "several" and "a number" mean two or more, unless otherwise clearly and specifically defined.

[0032] Reference Figures 1 to 9 The present invention is further described.

[0033] A plastic bag folding and bundling device comprises a frame 8, on which are arranged:

[0034] Two grabbing and transferring mechanisms 1, grabbing and transferring plastic bags;

[0035] Punching and cutting mechanism 2, capable of punching and cutting two plastic bags at the same time;

[0036] The handle folding mechanism 3 folds the two handles of the plastic bag synchronously;

[0037] The bag body folding mechanism 4 folds the bag body of the plastic bag, and can fold a small-sized plastic bag;

[0038] A lifting mechanism 5, for grabbing and lifting the folded plastic bag;

[0039] The bundling mechanism 6 expands the rubber band and puts it on the lifted plastic bag for bundling.

[0040] like Figure 1 As shown, in this embodiment, preferably, the grabbing and transferring mechanism 1 includes a grabbing plate 11 , on which a plurality of grabbing claws 12 are provided, and the grabbing plate 11 is slidably connected to the frame 8 .

[0041] Preferably, the grab plate 11 and the frame 8 can be connected via a slide rail slider, and a belt is provided on the frame 8, the grab plate 11 is connected to the belt, and the belt can be driven by a motor, so that the movement of the grab plate 11 is driven by the operation of the belt.

[0042] like Figure 1 As shown, in the present embodiment, preferably, the stamping and cutting mechanism 2 includes a stamping bracket 21, two stamping mechanisms 22 are arranged on the stamping bracket 21, two vertical and mutually parallel supporting base plates 23 are arranged below the stamping bracket 21, a conveying plate 24 is arranged on the supporting base plate 23, and two stamping base plates 25 corresponding to the stamping mechanisms 22 are arranged on the conveying plate 24.

[0043] When punching and cutting the handles of the plastic bag, the grabbing plate 11 moves close to the plastic bag, and then grabs the plastic bag through the grabbing claws 12, and then the plastic bag is transported to the stamping bottom plate 25 by moving the grabbing plate 11, and the handles of the plastic bag can be punched and cut by the stamping mechanism 22. During the cutting process, the grabbing claws 12 always clamp the plastic bag, and after cutting, the grabbing plate 11 transports the plastic bag to the bag body placement plate 31 to fold the handles, and then the grabbing plate 11 returns to grab the next plastic bag.

[0044] Preferably, a waste conveyor belt 7 is provided below one side of the conveying plate 24, and a drive is connected to the waste conveyor belt 7, and both ends of the waste conveyor belt 7 extend out of the frame 8. After the plastic bag is punched and cut, the waste after punching and cutting first remains on the punching bottom plate 25, and when the grabbing plate 11 returns, it will pass through the punching bottom plate 25, so that the waste on the punching bottom plate 25 is pushed out of the punching bottom plate 25 through the grabbing claw 12, and makes it fall onto the waste conveyor belt 7 below, so that the waste is sent out through the waste conveyor belt 7.

[0045] Preferably, the conveying direction of the waste conveyor belt 7 is changed by changing the running direction of the driving mechanism so that the waste can be conveyed from both ends.

[0046] Preferably, the punching mechanism 22 is of the prior art, which includes a punching cylinder and a cutting die. During punching and cutting, the punching cylinder drives the cutting die downward, and after the cutting die contacts the plastic bag, the plastic bag is punched and cut by pressure.

[0047] Preferably, the stamping bottom plate 25 is made of plastic material to reduce damage to the cutting die caused by stamping and cutting.

[0048] Preferably, a reinforcing plate 26 is provided between the stamping bracket 21 and the supporting base plate 23, and the reinforcing plate 26 is located between the two stamping base plates 25. The reinforcing plate 26 is in an "A" shape, and the two feet at the bottom thereof are respectively connected to the two supporting base plates 23. The reinforcing plate 26 is provided to prevent the middle position of the supporting base plate 23 from being concave and deformed after long-term stamping, to avoid the stamping base plate 25 on the supporting base plate 23 from tilting and affecting the stamping and cutting effect of the plastic bag, and at the same time to improve the service life of the stamping base plate 25.

[0049] like Figure 1 As shown, in the present embodiment, preferably, the handle folding mechanism 3 includes a liftable bag body placing plate 31 and a synchronous folding mechanism, two retractable telescopic plates 32 are arranged on the bag body placing plate 31, and both sides of the telescopic plates 32 are beveled edges, and a clamping mechanism is arranged above the bag body placing plate 31, and the synchronous folding mechanism includes a first folding plate 33 and a second folding plate 34 which can move synchronously toward each other or synchronously in opposite directions, and the first folding plate 33 is located above the second folding plate 34, and the first folding plate 33 is located below the telescopic rod.

[0050] Before the grab plate 11 places the plastic bag on the bag body placement plate 31, the telescopic plate 32 on the bag body placement plate 31 is extended first, and the first folding plate 33 and the second folding plate 34 are respectively located on both sides of the telescopic plate 32. When the grab plate 11 places the plastic bag, the rear section of the plastic bag body is located on the bag body placement plate 31, and the front section thereof is located on the telescopic plate 32, and the rear section of the bag body is pressed against the bag body support plate 36 by the pressing mechanism, and the two handles are unsupported due to the oblique edges on both sides of the telescopic plate 32, and are in a naturally hanging state, and the first folding plate 33 and the second folding plate 34 move toward each other synchronously, and the handles can be folded after they collide with the handles, and when the first folding handle and the second folding handle move to an overlapping state up and down, the telescopic plate 32 retracts, and the pressing mechanism presses the front section of the plastic bag body against the first folding plate 33, i.e., the folding of the handles is completed, and the first folding plate 33 and the second folding plate 34 are folded synchronously during folding, thereby improving the folding efficiency of the handles.

[0051] Preferably, a synchronous transmission belt is provided on the frame 8, and the first folding plate 33 and the second folding plate 34 are respectively connected to the upper belt strip and the lower belt strip of the synchronous transmission belt. The synchronous transmission belt is driven to realize the same direction or reverse direction operation between the first folding plate 33 and the second folding plate 34.

[0052] Preferably, a lifting device is provided between the bag placing plate 31 and the frame 8 to drive the lifting and lowering of the bag placing plate 31, and the telescopic plate 32 is slidably connected to the bottom of the bag placing plate 31, and the telescopic plate 32 is slidably connected to the bag placing plate 31, and the telescopic plate 32 is driven to be extended and retracted by a driving mechanism.

[0053] like Figure 1 As shown, in the present embodiment, preferably, a rotatable shaft 35 is provided on the frame 8, and support plates 36 are provided on both sides of the telescopic plate 32, and the support plates 36 are connected to the shaft 35. When the first folding plate 33 and the second folding plate 34 fold the two handles, the shaft 35 rotates to rotate and lift the two support plates 36, and then the telescopic plate 32 retracts, that is, the front section of the bag body of the plastic bag is supported by the two support plates 36 and the first folding plate 33, thereby improving the supporting effect. After the pressing mechanism presses the front section of the bag body, the fixing effect of the front section of the bag body is improved, thereby preparing for the folding of the bag body.

[0054] Preferably, a connecting rod is hinged on the rotating shaft 35, the connecting rod is hinged to the piston rod of the cylinder, and the cylinder body of the cylinder is hinged to the frame 8, thereby forming a connecting rod mechanism, so that the rotation of the rotating shaft 35 is driven by the cylinder, and the rotating shaft 35 can also be directly driven by a motor or a rotary cylinder.

[0055] like Figure 1 As shown, in the present embodiment, the clamping mechanism preferably includes a clamping bracket 37, and a first clamping rod 38 and a second clamping rod 39 are provided on the clamping bracket 37. The first clamping rod 38 is located above the bag body placement plate 31 near one end of the synchronous folding mechanism, and the second clamping rod 39 is located on the side of the first clamping rod 38 near the synchronous folding mechanism. The rear section of the bag body is clamped by the first clamping rod 38 to facilitate the folding of the handle. After the handle is folded, the front section of the bag body is clamped by the second clamping rod 39 to fix the bag body while preventing the folded handle from spreading out. At the same time, the first folding rod 41 is released to prepare for the folding of the bag body.

[0056] Preferably, the first pressing rod 38 and the second pressing rod 39 can be driven respectively by a cylinder or an electric telescopic rod.

[0057] Preferably, the first pressing rod 38 and the second pressing rod 39 are both provided with guide rods, and the guide rods are slidably connected to the pressing bracket 37, so as to improve the movement efficiency of the first pressing rod 38 and the second pressing rod 39.

[0058] like Figure 1 As shown, in this embodiment, preferably, the bag folding mechanism 4 includes a first folding jaw mechanism and a second folding jaw mechanism, the first folding jaw mechanism includes a rotatable and slidable first folding rod 41, the first folding rod 41 is provided with a first clamping plate 42 and a second clamping plate 43 parallel to each other, the second clamping plate 43 is slidably connected to the first folding rod 41, the second folding jaw mechanism includes a rotatable second folding rod 44, the second folding rod 44 is provided with a third clamping plate 45 and a locking plate 46 parallel to each other, the locking plate 46 is slidably connected to the second folding rod 44.

[0059] Preferably, in order to facilitate the understanding of the folding process of the bag body, the folding process is simplified as follows: Figure 1 As shown, processes 1 and 2 are the first folding; processes 3 and 4 are the second folding; and processes 5 and 6 are the third folding.

[0060] When the first pressing rod 38 releases the rear section of the bag body, the bag body placement plate 31 descends, so that the rear section of the bag body gradually droops naturally. At this time, the first clamping plate 42 on the first folding rod 41 is located above the second clamping plate 43, and the first clamping plate 42 is located above the plastic bag. The second clamping plate 43 is moved to correspond to the drooping rear section of the bag body, and then the first folding rod 41 moves toward the plastic bag. When the second clamping plate 43 conflicts with the drooping part of the bag body, the bag body begins to be folded for the first time.

[0061] After the first folding is completed, a part of the rear section of the bag body is still in a drooping state, and the second clamping plate 43 moves up to clamp the bag body after the first folding and the front section of the bag body on the first clamping plate 42, and then the second pressing rod 39 is released, and the first folding rod 41 first moves a short distance toward the second folding rod 44, and then rotates downward 180 degrees to flip, so that the first clamping plate 42 and the second clamping plate 43 are both facing the second folding rod 44, and the first clamping plate 42 is located below the second clamping plate 43. At this time, the third clamping plate 45 is located below the first clamping plate 42, and the locking plate 46 moves up to open, and then the first folding rod 41 moves toward the second folding rod 44 again, and when the third clamping plate 45 conflicts with the remaining drooping part of the bag body of the plastic bag, the bag body starts to be folded for the second time;

[0062] After the second folding is completed, the second clamping plate 43 first releases the plastic bag, and the first folding rod 41 drives the first clamping plate 42 and the second clamping plate 43 to move a certain distance away from the second folding rod 44, and then clamps the end of the folded bag body through the second clamping plate 43 and the first clamping plate 42, and then the first folding rod 41 rotates counterclockwise and moves closer to the second folding rod 44 at the same time, and the second folding rod 44 rotates clockwise at the same time, and the first folding bag body and the second folding bag body are started to be folded upwards, that is, the third folding, when the first clamping plate 42 and the third clamping plate 45 are parallel and upward at the same time, the folding of the bag body is completed, and the folded plastic bag is lifted by the lifting mechanism 5.

[0063] Preferably, the second clamping plate 43 and the locking plate 46 can be respectively connected to the first folding rod 41 and the second folding rod 44 by means of a cylinder or an electric telescopic rod, so as to clamp and release the plastic bag.

[0064] Preferably, the first folding rod 41 and the second folding rod 44 are both connected with a rotation drive, which can be a motor or a rotary cylinder, etc., and a sliding drive is also arranged between the rotation drive on the first folding rod 41 and the frame 8 to realize the rotation and sliding of the first folding rod 41.

[0065] like Figure 1 As shown, in the present embodiment, preferably, the lifting mechanism 5 comprises a lifting manipulator located at the tail of the frame 8, the lifting manipulator is provided with a plurality of lifting claws 51, the lifting manipulator comprises a rotatable lifting base 52, a rotatable first lifting arm 53 is provided on the lifting base 52, two rotatable second lifting arms 54 are provided on the first lifting arm 53, a rotatable lifting bracket 55 is provided on the second lifting arm 54, and the lifting claws 51 are connected to the lifting bracket 55.

[0066] When the plastic bag is folded, the lifting claw 51 opens, and the lifting claw 51 is brought close to the plastic bag and clamped by the first lifting arm 53, the second lifting arm 54 and the lifting bracket 55. After clamping, the plastic bag is lifted to the bundling height and can be bundled by the bundling mechanism 6. After bundling is completed, the lifting base 52 is rotated to place it on the discharge conveyor belt and send it out of the mechanism.

[0067] Preferably, a storage box (bag) is provided on the discharge conveyor belt, and the lifting robot can directly place the bundled plastic bags in the storage box (bag) to directly complete the packaging of the plastic bags.

[0068] like Figure 1As shown, in the present embodiment, preferably, the bundling mechanism 6 comprises a movable rubber band transfer frame 61, a rubber band grabbing mechanism and a rubber band expansion mechanism located on the frame 8, the rubber band grabbing mechanism comprises a storage barrel 62, a rotatable rotating bracket 63, a lifting bracket 64 lifted and connected to the rotating bracket 63, and two grabbing fingers 65 located on the lifting bracket 64, and one of the grabbing fingers 65 is provided with a vacuum adsorption hole 66, the rubber band expansion mechanism comprises two expansion components, the expansion component comprises a first expansion plate 67 and a second expansion plate 68, the first expansion plate 67 and the second expansion plate 68 can rotate synchronously towards each other or synchronously in opposite directions, and the first expansion plate 67 and the second expansion plate 68 are both provided with expansion rods 69.

[0069] The grabbing fingers 65 on the lifting bracket 64 grab a number of rubber bands in the storage barrel 62 at one time, and then the rubber bands on the grabbing fingers 65 are adsorbed through the vacuum adsorption holes 66. When one rubber band is adsorbed, the grabbing fingers 65 are released to allow the remaining rubber bands to fall back into the storage barrel 62, and then the rotating bracket 63 is rotated to transfer the adsorbed rubber bands and put them on the four expansion rods 69. After the grabbing fingers 65 are released, the first expansion plate 67 and the second expansion plate 68 rotate in opposite directions at the same time, so that the four expansion rods 69 are separated from each other, and the rubber bands can be expanded. After the rubber bands are expanded, the rubber bands on the expansion rods 69 are transferred to the rubber band transfer frame 61 through the rubber band transfer frame 61, and then the rubber band transfer frame 61 moves toward the lifted plastic bag. When the rubber band moves to the middle of the plastic bag, it conflicts with the lifting clamp 51 and falls from the rubber band transfer frame 61 and is tightened on the plastic bag, completing the bundling of the plastic bag.

[0070] Preferably, an exchange slot 9 is provided at the end of the rubber band transfer frame 61. After the slot wall of the exchange slot 9 contacts the rubber band on the expansion rod 69, the rubber band can be pushed out of the expansion rod 69 and put on the exchange slot 9 to realize the exchange of the rubber band. When the rubber band is put on the plastic bag, the rubber band is pushed out of the exchange slot 9 by lifting the clamp 51 so that it is tightened on the plastic bag.

[0071] Preferably, the vacuum adsorption hole 66 on the grasping finger 65 can be connected to a vacuum generator, and the vacuum adsorption hole 66 can generate a vacuum negative pressure through the vacuum generator to absorb the rubber band.

[0072] Preferably, vacuum adsorption holes 66 can be provided on both grasping fingers 65 to grasp two rubber bands, expand the two rubber bands, and tighten them on the same plastic bag to improve the bundling effect of the plastic bag.

[0073] Preferably, the first expansion plate 67 and the second expansion plate 68 are connected via mutually meshing gears to achieve synchronous rotation.

[0074] Preferably, a driving rod is hinged on the two first expansion plates 67, and the two driving rods are hinged to the same expansion drive plate. The expansion drive cover plate is slidably connected to the frame 8 and driven by a cylinder or an electric telescopic rod to achieve synchronous operation of the two first expansion plates 67 and the two second expansion plates 68.

[0075] Preferably, the storage barrel 62 is rotatably connected to the frame 8 and driven by a motor or the like.

[0076] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A plastic bag folding and bundling device, characterized in that: The invention comprises a frame, on which are arranged: Two grabbing and transferring mechanisms to grab and transfer plastic bags; Punching and cutting mechanism can punch and cut two plastic bags at the same time; The handle folding mechanism folds the two handles of the plastic bag synchronously; The bag body folding mechanism folds the bag body of the plastic bag, and can fold small-sized plastic bags; A lifting mechanism to grab and lift the folded plastic bag; The tying mechanism expands the rubber band and puts it on the lifted plastic bag for tying; The handle folding mechanism comprises a liftable bag body placement plate and a synchronous folding mechanism, wherein two retractable telescopic plates are arranged on the bag body placement plate, and the two side edges of the telescopic plates are beveled edges, and a pressing mechanism is arranged above the bag body placement plate, and the synchronous folding mechanism comprises a first folding plate and a second folding plate which can move synchronously towards each other or synchronously in the opposite direction, wherein the first folding plate is located above the second folding plate, and the first folding plate is located below the telescopic plate; The frame is provided with a rotatable shaft, and support plates are provided on both sides of the telescopic plate, and the support plates are connected to the shaft; The clamping mechanism includes a clamping bracket, on which a first clamping rod and a second clamping rod are arranged. The first clamping rod is located above one end of the bag body placement plate close to the synchronous folding mechanism, and the second clamping rod is located on the side of the first clamping rod close to the synchronous folding mechanism.

2. The plastic bag folding and bundling device according to claim 1, characterized in that: The grabbing and transferring mechanism comprises a grabbing plate, on which a plurality of grabbing claws are arranged, and the grabbing plate is slidably connected to the frame.

3. The plastic bag folding and bundling device according to claim 2, characterized in that: The stamping and cutting mechanism includes a stamping bracket, two stamping mechanisms are arranged on the stamping bracket, two vertical and mutually parallel supporting base plates are arranged below the stamping bracket, a conveying plate is arranged on the supporting base plate, two stamping base plates corresponding to the stamping mechanisms are arranged on the conveying plate, a reinforcing plate is arranged between the stamping bracket and the supporting base plate, and the reinforcing plate is located between the two stamping base plates.

4. The plastic bag folding and bundling device according to claim 1, characterized in that: The bag folding mechanism includes a first folding jaw mechanism and a second folding jaw mechanism, the first folding jaw mechanism includes a rotatable and slidable first folding rod, the first folding rod is provided with a first clamping plate and a second clamping plate parallel to each other, the second clamping plate is slidably connected to the first folding rod, the second folding jaw mechanism includes a rotatable second folding rod, the second folding rod is provided with a third clamping plate and a locking plate parallel to each other, the locking plate is slidably connected to the second folding rod.

5. The plastic bag folding and bundling device according to claim 4, characterized in that: The lifting mechanism includes a lifting manipulator located at the rear of the frame, a plurality of lifting claws are arranged on the lifting manipulator, the lifting manipulator includes a rotatable lifting base, a rotatable first lifting arm is arranged on the lifting base, two rotatable second lifting arms are arranged on the first lifting arm, a rotatable lifting bracket is arranged on the second lifting arm, and the lifting claws are connected to the lifting bracket.

6. The plastic bag folding and bundling device according to claim 5, characterized in that: The bundling mechanism includes a movable rubber band transfer frame, a rubber band grabbing mechanism and a rubber band expansion mechanism located on the frame, the rubber band grabbing mechanism includes a storage barrel, a rotatable rotating bracket, a lifting bracket lifted and connected to the rotating bracket, and two grabbing fingers located on the lifting bracket, and one of the grabbing fingers is provided with a vacuum adsorption hole, the rubber band expansion mechanism includes two expansion components, the expansion components include a first expansion plate and a second expansion plate, the first expansion plate and the second expansion plate can rotate synchronously towards each other or synchronously in opposite directions, and the first expansion plate and the second expansion plate are both provided with expansion rods.

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