A kind of pull-out plastic bag rolling device and rolling method thereof

Abstract

The invention relates to the technical field of plastic bag winding, and more specifically, it relates to a pull-out type plastic bag winding device and a winding method thereof, comprising a machine base, a bag cutting mechanism, and a winding mechanism. The machine base is rotatably equipped with a first-level bag feeding mechanism, a second-level bag feeding mechanism, a third-level bag feeding mechanism, and a fourth-level bag feeding mechanism. The bag cutting mechanism rotates around the second-level bag feeding mechanism and is used to break the plastic bags between the first-level bag feeding mechanism and the second-level bag feeding mechanism and / or the plastic bags between the second-level bag feeding mechanism and the third-level bag feeding mechanism. The fourth-level bag feeding mechanism comprises a conveyor belt, which is used to convey the plastic bags stacked by the third-level bag feeding mechanism. The winding mechanism is located above the fourth-level bag feeding mechanism. The winding mechanism comprises a bag collecting roller rotatably assembled with the machine base, which is provided with an air suction hole and is used to absorb the plastic bags on the conveyor belt and then rewind them, thereby completing the tearing, stacking, and rewinding of the plastic bags, thereby improving the degree of automation of the pull-out type plastic rewinding and improving the rewinding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bag rolling, in particular to a pull-out plastic bag rolling device and a rolling method thereof. Background Art

[0002] Plastic bags are bags made of plastic as the main raw material. They are essential items in people's daily lives and are often used to hold other items. They are widely used because of their low cost, light weight, large capacity and easy storage. Since plastic bags are light and thin, a certain number of plastic bags are usually rolled into rolls for easy storage, transportation and use. At the same time, the rolled plastic bags can be torn off at any time when needed, which improves the convenience of use.

[0003] At present, the commonly used plastic bag rolling method is the continuous roll type, which is completed through the processes of film blowing, heat sealing, ant line cutting and rolling. Its characteristic is that the plastic bags are continuous. Due to its simple process and high processing efficiency, it is widely used in production. However, when using, it is necessary to tear them off one by one along the ant line. If the tearing force is too great, the two adjacent plastic bags are easily torn, making the plastic bags unusable and causing waste. Secondly, when tearing off the plastic bags, if too much force is used or the hands are wet, the rolled plastic bags are easily slipped, causing the rolled plastic bags to be unrolled or scattered, causing the user to spend extra time and energy to sort them out. At this stage, in order to improve the holding capacity of plastic bags and prevent the plastic bags from breaking after holding items, it is often necessary to improve the toughness of plastic bags, which makes the plastic bags after continuous roll-type rolling more difficult to tear off and use, and poor in convenience.

[0004] The plastic bag roll that adopts another winding method, the pull-out type winding plastic bag, is popular among users because of its convenient and quick use. The user only needs to gently pull the plastic bag from the rolled bag to pull out the plastic bag without having to tear it laboriously. This design not only saves the user's time and energy and improves the use efficiency, but also reduces the possibility of the rolled plastic bag falling off when tearing the plastic bag. However, the difference between the pull-out type plastic bag and the continuous roll type plastic bag lies in the different winding process. After the pull-out type plastic bag is blown, heat sealed, and cut with the ant line, the plastic bag still needs to be cut and stacked before being wound. Therefore, in order to improve the degree of automation of the pull-out type plastic bag winding, it is necessary to design a pull-out type plastic bag winding equipment to complete the tearing, stacking, and winding actions of the plastic bag.

[0005] Invention content

[0006] In order to improve the degree of automation of pull-out plastic bag rolling, the present application provides a pull-out plastic bag rolling device and a rolling method thereof.

[0007] In the first aspect, the present invention provides a novel pull-out plastic bag winding device, which adopts the following technical solution:

[0008] The bag-cutting mechanism rotates around the second bag-feeding mechanism and is used to break the plastic bags between the first bag-feeding mechanism and the second bag-feeding mechanism and / or the plastic bags between the second bag-feeding mechanism and the third bag-feeding mechanism. The fourth bag-feeding mechanism includes a conveyor belt, which is used to convey the plastic bags stacked by the third bag-feeding mechanism. The reeling mechanism is located above the fourth bag-feeding mechanism. The reeling mechanism includes a bag-collecting roller rotatably assembled with the base, the bag-collecting roller is provided with a suction hole and is used to absorb the plastic bags on the conveyor belt and then reel them up.

[0009] Preferably, the first-level bag feeding mechanism includes a first bag feeding roller and a rubber ring. The first bag feeding roller is provided in an even number. The axes of the multiple groups of the first bag feeding rollers are parallel and spaced apart up and down and left and right. The first bag feeding rollers are rotatably assembled with the machine base. The multiple groups of the first bag feeding rollers are driven by pulleys and belts. The outer ring wall of the first bag feeding roller is provided with several groups of annular grooves. The rubber ring is arranged in the annular grooves of the multiple groups of the first bag feeding rollers, and part of the rubber ring is exposed on the outer ring wall of the first bag feeding roller.

[0010] Preferably, the secondary bag feeding mechanism includes a connecting disk, a second bag feeding roller, and a bag pressing roller. The second bag feeding roller is rotatably assembled with the connecting disk. The connecting disk is provided with two groups and is respectively located at both ends of the axis of the second bag feeding roller. The connecting disk is connected to the machine base. The second bag feeding roller is provided with an even number of groups. The axes of multiple groups of second bag feeding rollers are parallel and spaced apart up and down and left and right. Multiple groups of second bag feeding rollers are driven by pulleys and belts. The bag pressing roller is slidably assembled with the connecting disk to adjust the pressing force on the plastic bag.

[0011] Preferably, the bag breaking mechanism includes a rotating ring, a counterweight, and a bag breaking shaft. The connecting disk is arranged in a circular shape, and multiple groups of the second bag feeding rollers are symmetrically arranged along the center of the connecting disk. There are two groups of rotating rings, and the two groups of rotating rings are respectively coaxially rotated and assembled with the connecting disk. The outer ring wall of the rotating ring begins to have a synchronous belt groove, and the rotating ring is driven by a synchronous belt. The two ends of the counterweight are respectively connected between the two groups of rotating rings, and the bag breaking shaft is rotatably assembled with the counterweight, and the bag breaking shaft is located on the side of the counterweight close to the plastic bag in the rotation direction of the counterweight. There are two groups of counterweights and the bag breaking shaft and they are arranged opposite to each other in the same diameter direction of the connecting disk.

[0012] Preferably, the three-stage bag feeding mechanism includes a third bag feeding roller, and the four-stage bag feeding mechanism also includes a driven roller. The third bag feeding roller is rotatably assembled with the machine base. Two groups of third bag feeding rollers are provided. The two groups of third bag feeding rollers are arranged up and down and are located between the two-stage bag feeding mechanism and one side of the winding mechanism. The driven roller is rotatably assembled with the machine base and is located on the other side of the winding mechanism. The conveyor belt is sleeved between the third bag feeding roller and the driven roller located below. The third bag feeding roller located below is driven by a pulley and a belt.

[0013] Preferably, it also includes an electrostatic generator, an upper cover mechanism, and a lower lifting mechanism. The electrostatic generator is installed between the three-stage bag feeding mechanism and the winding mechanism to emit static electricity to the plastic bags on the conveyor belt. The upper cover mechanism is located between the electrostatic generator and the winding mechanism. The upper cover mechanism includes a blowing hood, which is rotatably assembled with the machine base and is used to cover the bag collecting roller. A blowing hole is provided on the bottom surface of the blowing hood on the side away from the three-stage bag feeding mechanism. The inner wall of the blowing hood is arranged in an arc shape. The lower lifting mechanism includes a bag lifting roller, which is located below the conveyor belt and is used to lift the conveyor belt toward the bag collecting roller.

[0014] Preferably, it also includes a unloading mechanism for pushing the rolled plastic bags to slide off the bag collecting roller, the unloading mechanism includes two groups of turntables, two groups of brackets, and two groups of guide rods, the axes of the two groups of guide rods are arranged parallel to the axes of the bag collecting roller, and the two groups of guide rods are arranged at intervals, one end of the bracket is slidably assembled with the two groups of guide rods, and the other end of the bracket is rotatably assembled with the turntable, the two groups of turntables are coaxially arranged with the bag collecting roller, and the two groups of turntables are respectively located at the two ends of the bag collecting roller, and an avoidance hole for avoiding the bag collecting roller is opened at the axis center of the turntable.

[0015] Preferably, it also includes a jacking mechanism, which includes a movable frame and a jacking cylinder. The movable frame is arranged in a U shape, and the two side plates of the movable frame are respectively located on both sides of the conveyor belt. The jacking cylinder is located below the conveyor belt and is used to push the movable frame to move up and down. The winding mechanism and the unloading mechanism are both installed on the movable frame, and the movable frame is slidably assembled with the machine base.

[0016] Preferably, it also includes a labeling mechanism, and the upper cover mechanism, the winding mechanism, the lower lifting mechanism, the jacking mechanism, and the unloading mechanism are provided in at least two groups and are spaced apart along the moving direction of the conveyor belt. The labeling mechanism includes a labeling machine, a labeling rack, a labeling gear, and a rotating motor. The labeling machine is slidably assembled on the machine base and is used to label multiple groups of rolled plastic bags on the winding mechanism. The labeling rack is connected to the top wall of the machine base, the labeling gear is axially connected to the rotating end of the rotating motor, the fixed end of the rotating motor is connected to the labeling machine, and the labeling gear is meshed with the labeling rack for transmission.

[0017] In a second aspect, the present invention provides a novel method for rolling up a removable plastic bag, which adopts the following technical solution:

[0018] A removable plastic bag and its rolling method, comprising the above-mentioned removable plastic bag rolling device, adopting the following steps to roll:

[0019] S1. Loading the strip of plastic bags: The strip of plastic bags passes through the first, second, and third feeding mechanisms in sequence;

[0020] S2. Cutting the Plastic Bags in a Strand: The primary, secondary, tertiary, and quaternary bag-cutting mechanisms operate. The bag-cutting mechanisms rotate to separate the plastic bags from the strand. The tertiary bag-feeding mechanism rotates at a low speed, stacking the bags sequentially for transport.

[0021] S3. Pull-out plastic bags are alternately wound: the winding mechanism includes a first winding mechanism and a second winding mechanism arranged in a front-to-back manner, and the unloading mechanism includes a first unloading mechanism and a second unloading mechanism arranged in a front-to-back manner. After the first winding mechanism winds up the plastic bags stacked on the conveyor belt, the labeling mechanism performs labeling, and the first unloading mechanism unloads the rolled plastic bags on the first winding mechanism. At the same time, the second winding mechanism winds up the plastic bags stacked on the conveyor belt, and then the labeling mechanism performs labeling, and the second unloading mechanism unloads the rolled plastic bags on the second winding mechanism, and the operation is repeated and alternating.

[0022] The beneficial effects of the present invention are:

[0023] By providing a bag-breaking mechanism, since the counterweight blocks and the bag-breaking shafts are provided in two groups and are arranged opposite to each other in the same diameter direction of the connecting disk, one group of counterweight blocks and the bag-breaking shafts are located above the plastic bag, and the other group of counterweight blocks and the bag-breaking shafts are located below the plastic bag. The rotating ring rotates, causing the counterweight blocks and the bag-breaking shafts to rotate toward the plastic bag, applying tension to the plastic bag, so that the plastic bag is torn off from the connected plastic along the ant line, thereby improving the degree of automation of the plastic bag cutting and providing the necessary conditions for the retractable plastic bag winding.

[0024] Because the rotation speed of the three-stage bag feeding mechanism is lower than that of the first-stage bag feeding mechanism, there is a difference in moving speed between two adjacent plastic bags, so that the two adjacent plastic bags are stacked on each other and then fed out from the three-stage bag feeding mechanism, and then rolled up after stacking. The rolled plastic bags are pull-out type. When in use, the user only needs to pull out and rotate the plastic bag roll to separate a single plastic bag from the plastic bag roll, thereby improving the convenience and user experience.

[0025] By providing an upper cover mechanism and a lower lifting mechanism, when winding, the bag collecting roller absorbs the plastic bag and rotates, and the blowing hood cover is provided on the bag collecting roller to limit the plastic bag between the blowing hood and the bag collecting roller, thereby reducing the possibility of the plastic bag escaping from between the blowing hood and the conveyor belt, and improving the stability and continuity of the plastic bag winding. The bag lifting roller lifts the conveyor belt toward the bag collecting roller, so that the conveyor belt forms an upward curved arc, so that the plastic bag has a tendency to move upward during the forward movement and is wound around the bag collecting roller, which makes it easier for the bag collecting roller to absorb the plastic bag on the winding conveyor belt.

[0026] By alternating winding, labeling and unloading, when the first winding mechanism completes winding, the bag lifting roller of the first lower lifting mechanism will move away from the conveyor belt, release the plastic bag on the conveyor belt, and allow the plastic bag to be transported to the second winding mechanism by the conveyor belt. Correspondingly, the bag lifting roller of the lower lifting mechanism will rise, so that the winding roller of the second winding mechanism will wind up the plastic bag. After the winding is completed, the labeling machine slides to the second winding mechanism and labels the rolled packaging bag on the bag receiving roller. This alternating operation is repeated to ensure the continuity of the pull-out plastic bag winding process, reduce the waiting time during the process, and thus improve the winding efficiency and automation level of the plastic bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a stereogram in Example 1 of the present application;

[0028] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0029] Figure 3 is a sectional perspective view in Example 1 of the present application;

[0030] Figure 4 yes Figure 3 Left view in;

[0031] Figure 5 yes Figure 5 A partial enlarged view of point B in the middle;

[0032] Figure 6 This is the first partial stereogram in Example 1 of the present application;

[0033] Figure 7 This is an assembly diagram of the secondary bag feeding mechanism and the bag cutting mechanism in Example 1 of the present application;

[0034] Figure 8 yes Figure 7 The cutaway perspective view in

[0035] Figure 9 This is a three-dimensional diagram of the first-level bag feeding mechanism in Example 1 of the present application;

[0036] Figure 10 This is the second partial stereogram in Example 1 of the present application;

[0037] Figure 11 This is a schematic diagram of the broken belt processing in Example 1 of the present application;

[0038] Figure 12 This is a flow chart of the winding method in Example 2 of the present application.

[0039] Explanation of the reference numerals: 1. Machine base; 101. Electrostatic generator; 102. Feeding port; 201. Rotating ring; 2011. Synchronous belt groove; 202. Counterweight; 203. Bag breaking shaft; 301. Bag collecting roller; 3012. Suction hole; 411. First bag feeding roller; 4111. Annular groove; 412. Rubber ring; 413. Sensor; 414. Bag clamping roller; 415. First vertical adjustment cylinder; 416. First pressure block; 417. Tensioning roller; 421. Connecting plate; 422. Second bag feeding roller; 423. Bag pressing roller; 431. Third bag feeding roller; 432. Second vertical adjustment cylinder; 433. Second pressure block; 441. Conveying Belt; 442, driven roller; 501, blowing hood; 5011, blowing hole; 502, upper roller shaft; 503, upper cover gear; 504, upper cover rack; 505, upper cover push cylinder; 506, upper rubber roller; 507, lower iron roller; 508, lower pressure cylinder; 601, bag lifting roller; 602, lower lifting push cylinder; 603, clamping block; 604, connected rotating shaft; 605, connecting part; 701, turntable; 7011, avoidance hole; 702, bracket; 703, guide rod; 704, chain window opener; 801, movable frame; 802, lifting cylinder; 901, labeling machine; 903, labeling gear; 904, rotating motor. DETAILED DESCRIPTION

[0040] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that each technical feature and the overall technical solution of the present application can be understood intuitively and vividly, but it cannot be understood as a limitation on the scope of protection of the present application.

[0041] In the description of this application, if there is a description of orientation, such as "upper", "lower", "front", "back", "left", "right", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on this application. When a feature is referred to as being "disposed", "fixed", or "connected" to another feature, it can be directly disposed, fixed, or connected to the other feature, or indirectly disposed, fixed, or connected to the other feature.

[0042] In the description of this application, if the word "several" is mentioned, it means one or more; if the word "multiple" is mentioned, it means more than two; if the word "greater than," "less than," or "exceeds," it should be understood as excluding the number itself; if the word "above," "below," or "within" is mentioned, it should be understood as including the number itself. If the word "first" or "second" is mentioned, it should be understood as distinguishing technical features, and should not be understood as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0043] In addition, unless otherwise defined, the technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art. The terms used in this application are only for describing specific embodiments and are not intended to limit this application. It should be understood that when used in this specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0044] Example: Figure 1-11As shown, a pull-out plastic bag winding device includes a machine base 1, a bag cutting mechanism, and a winding mechanism. The machine base 1 is sequentially rotated and equipped with a first-level bag feeding mechanism, a second-level bag feeding mechanism, a third-level bag feeding mechanism, and a fourth-level bag feeding mechanism. The first-level bag feeding mechanism is used to convey continuous plastic bags, the second-level bag feeding mechanism is used to convey a single plastic bag to be cut from the continuous plastic bag, and the third-level bag feeding mechanism is used to convey and stack two adjacent plastic bags. The rotation speed of the third-level bag feeding mechanism is lower than that of the first-level bag feeding mechanism. The bag cutting mechanism surrounds the second-level bag feeding mechanism. The bag mechanism rotates and is used to break the plastic bags between the first-level bag feeding mechanism and the second-level bag feeding mechanism and / or the plastic bags between the second-level bag feeding mechanism and the third-level bag feeding mechanism. The fourth-level bag feeding mechanism includes a conveyor belt 441, which is used to convey the plastic bags stacked by the third-level bag feeding mechanism. The winding mechanism is located above the fourth-level bag feeding mechanism. The winding mechanism includes a bag receiving roller 301 rotatably assembled with the machine base 1. The bag receiving roller 301 is provided with an air suction hole 3012 and is used to absorb the plastic bags on the conveyor belt 441 and then reel them up.

[0045] Before processing, the linked plastic bags are first passed through the first-level bag feeding mechanism, the second-level bag feeding mechanism, and the third-level bag feeding mechanism. When processing starts, the first-level bag feeding mechanism, the second-level bag feeding mechanism, and the third-level bag feeding mechanism rotate to drive the plastic bags to move. At the same time, the bag breaking mechanism rotates to pull the linked plastic bags during the movement, and stress concentration occurs at the ant line, and the bags are broken into individual plastic bags. Then, since the rotation speed of the third-level bag feeding mechanism is lower than that of the first-level bag feeding mechanism, there is a difference in moving speed between the two adjacent plastic bags, so that the two adjacent plastic bags are stacked on each other and sent out from the third-level bag feeding mechanism to continue moving on the conveyor belt 441. Since the individual plastic bags after stacking lose connection, the conveyor belt 441 is needed to transport the stacked plastic bags to play a supporting role and prevent the stacked plastic bags from scattering during transportation. The risk of, when winding, the material receiving roller is started to rotate and air is sucked through the suction hole 3012, so that the winding mechanism adsorbs the stacked plastic bags moving on the conveyor belt 441, and completes the winding following the rotation of the bag receiving roller 301. After the winding is completed, the bag receiving roller 301 is stopped and the suction hole 3012 is stopped to suck air, and the rolled plastic bag is removed from the bag receiving roller 301, thereby obtaining a pull-out type plastic bag product. Since the linked plastic bags are cut into individual plastic bags by the bag breaking mechanism and are stacked and then wound up, when in use, the user only needs to pull out the rotating plastic bag roll to complete the separation of the individual plastic bags from the plastic bag roll, thereby improving the convenience and user experience of use. By using the pull-out type plastic bag winding device, the tearing, stacking and winding actions of the plastic bags are completed, thereby improving the degree of automation of the pull-out type plastic winding and improving the winding efficiency.

[0046] This embodiment provides a method for setting the speed difference between the three-stage bag feeding mechanism and the first-stage bag feeding mechanism. The corresponding gear ratio is (plastic bag length - overlapping length of two adjacent plastic bags) / plastic bag length: 1. The conventional plastic bag length is 450~850mm, and the overlapping length of two adjacent plastic bags is 120~200mm.

[0047] It should be noted that a linked plastic bag is a plastic bag that has been blown, heat-sealed, and cut with ant lines, and a single plastic bag is a plastic bag torn from a linked plastic bag, which is the smallest unit for use.

[0048] In terms of the specific structure of the material receiving mechanism, the material receiving mechanism also includes a material receiving servo motor, the fixed end of the material receiving servo motor is connected to the machine base 1, the rotating end of the material receiving servo motor is connected to pulley 1, one end of the bag receiving roller 301 is rotatably assembled with the machine base 1 and the shaft is connected to pulley 2, and pulley 1 and pulley 1 are driven by a belt.

[0049] In terms of the specific structure of the first-level bag feeding mechanism, the first-level bag feeding mechanism includes a first bag feeding roller 411 and a rubber ring 412. The first bag feeding roller 411 is provided in an even number, and the axes of the multiple groups of first bag feeding rollers 411 are parallel and arranged at intervals up and down and left and right. The first bag feeding roller 411 is rotatably assembled with the machine base 1, and the multiple groups of first bag feeding rollers 411 are driven by pulleys and belts. The outer ring wall of the first bag feeding roller 411 is provided with several groups of annular grooves 4111. The rubber ring 412 is sleeved in the annular grooves 4111 of the multiple groups of first bag feeding rollers 411, and part of the rubber ring 412 is exposed on the outer ring wall of the first bag feeding roller 411.

[0050] In this embodiment, eight groups of first bag feeding rollers 411 are provided, and six groups of annular grooves 4111 are opened at equal intervals on each group of first bag feeding rollers 411. Twelve groups of rubber rings 412 are provided, six groups of which are sleeved on the four groups of first bag feeding rollers 411 located above the continuous plastic bag, and the other six groups of which are sleeved on the four groups of first bag feeding rollers 411 located below the continuous plastic bag. The shafts of the multiple groups of first bag feeding rollers 411 are connected to pulley three, which is sleeved on pulley three of the multiple groups of first bag feeding rollers 411 through a belt, and the motor shaft is connected to pulley four to drive the belt, thereby realizing the simultaneous operation of the multiple groups of first bag feeding rollers 411. The first bag-feeding roller 411 is provided with multiple sets of first bag-feeding rollers 411 positioned above and below the continuous plastic bag strip, thereby conveying and compressing the continuous plastic bag strip. The compression process provides a compressive force for the bag-cutting mechanism to cut the continuous plastic bag strip, thereby facilitating the bag-cutting mechanism to effectively break the plastic bag. The first bag-feeding roller 411 is covered with multiple sets of rubber rings 412, with some of the rubber rings 412 exposed on the outer ring wall of the first bag-feeding roller 411. This increases the friction between the first bag-feeding roller 411 and the continuous plastic bag strip, thereby further facilitating the bag-cutting mechanism to cut the plastic bag. To adjust the tension of the rubber rings 412, a slidably adjustable tensioning roller 417 is provided between the first bag-feeding roller 411 and the second bag-feeding roller 411.

[0051] In terms of the specific structure of the secondary bag feeding mechanism, the secondary bag feeding mechanism includes a connecting disk 421, a second bag feeding roller 422, and a bag pressing roller 423. The second bag feeding roller 422 is rotatably assembled with the connecting disk 421. The connecting disk 421 is provided with two groups and is respectively located at both ends of the axis of the second bag feeding roller 422. The connecting disk 421 is connected to the machine base 1. The second bag feeding roller 422 is provided with an even number of groups. The axes of multiple groups of second bag feeding rollers 422 are parallel and spaced apart up and down and left and right. Multiple groups of second bag feeding rollers 422 are driven by pulleys and belts. The bag pressing roller 423 is slidably assembled with the connecting disk 421 to adjust the pressing force on the plastic bag. Multiple groups of second bag feeding rollers 422 are connected to the pulley five, which are arranged on multiple groups of the first The pulley five of the second bag feeding roller 422 is connected to the motor shaft with a pulley six driving belt. Of course, the second bag feeding roller 422 and the first bag feeding roller 411 can be driven separately by two sets of motors, or driven together by the same set of motors, so as to realize the synchronous rotation of multiple sets of second bag feeding rollers 422. The strip-shaped plastic bag passes through the first bag feeding roller 411 and enters between the second bag feeding rollers 422, realizing the conveyance of the plastic bag by the secondary bag feeding mechanism. By providing a bag pressing roller 423 that can be adjusted up and down, pressure is provided to the plastic bag, so that the bag breaking mechanism can better break the plastic bag. In this embodiment, four sets of second bag feeding rollers 422 are provided, and the bag pressing roller 423 is located between the two sets of upward-facing second bag feeding rollers 422.

[0052] In terms of the specific structure of the bag breaking mechanism, the bag breaking mechanism includes a rotating ring 201, a counterweight 202, and a bag breaking shaft 203. The connecting disk 421 is arranged in a circular shape, and multiple groups of second bag feeding rollers 422 are symmetrically arranged along the center of the connecting disk 421. The rotating ring 201 is provided with two groups, and the two groups of rotating rings 201 are respectively coaxially rotated and assembled with the connecting disk 421. The outer ring wall of the rotating ring 201 begins to have a synchronous belt groove 2011. The rotating ring 201 is driven by a synchronous belt. The two ends of the counterweight 202 are respectively connected between the two groups of rotating rings 201. The bag breaking shaft 203 is rotatably assembled with the counterweight 202, and the bag breaking shaft 203 is located on the side close to the plastic bag in the rotation direction of the counterweight 202. The counterweight 202 and the bag breaking shaft 203 are both provided with two groups and are arranged in the same diameter direction of the connecting disk 421 in opposite directions. The rotating end shaft of the synchronous motor is connected with a synchronous pulley, and the synchronous belt is sleeved on the synchronous motor. The rotating end of the machine is on the outer ring wall of the rotating ring 201, thereby realizing the rotation of the rotating ring 201. When the bag is cut, the strip-like plastic bag is passed between the first bag feeding roller 411 and the second bag feeding roller 422. Since the counterweight block 202 and the bag cutting shaft 203 are provided in two groups and are arranged oppositely in the same diameter direction of the connecting disk 421, one group of the counterweight blocks 202 and the bag cutting shaft 203 are located above the plastic bag, and the other group of the counterweight blocks 202 and the bag cutting shaft 203 are located below the plastic bag. By rotating the rotating ring 201, the counterweight blocks 202 and the bag cutting shaft 203 are rotated toward the plastic bag, applying tension to the plastic bag, so that the plastic bag is torn off from the strip-like plastic along the ant line. Of course, in order to improve the smoothness of the plastic bag breaking, the bag cutting shaft 203 can be aligned with the ant line and pressed down, thereby improving the degree of automation of the plastic bag breaking and providing the necessary conditions for the retractable plastic bag winding.

[0053] In order to detect whether the plastic bag is broken smoothly, the bag breaking mechanism also includes a sensor 413. The sensor 413 is installed between the first bag feeding rollers 411 located in the first-level bag feeding mechanism to detect the continuity of the linked plastic bags. However, if the detection signal does not change, it indicates that the linked plastic bag is broken abnormally. The detection signal is transmitted to the processor to control the equipment to stop. If the detection signal changes regularly, it indicates that the linked plastic bag is broken normally. As for the selection of the sensor 413, it is a selection method known to those skilled in the art.

[0054] In terms of the specific structure of the three-level bag feeding mechanism and the four-level bag feeding mechanism, the three-level bag feeding mechanism includes a third bag feeding roller 431, and the four-level bag feeding mechanism also includes a driven roller 442. The third bag feeding roller 431 is rotatably assembled with the machine base 1, and two groups of third bag feeding rollers 431 are provided. The two groups of third bag feeding rollers 431 are arranged up and down and are located between the secondary bag feeding mechanism and one side of the winding mechanism. The driven roller 442 is rotatably assembled with the machine base 1 and is located on the other side of the winding mechanism. The conveyor belt 441 is sleeved between the third bag feeding roller 431 and the driven roller 442 located below. The third bag feeding roller 431 located below is driven by a pulley and a belt. The shaft of the third bag feeding roller 431 is connected to a pulley seven, and is connected to a pulley eight through the conveying motor shaft. The belt is driven and drives the third bag feeding roller 431 and the conveyor belt 441 to rotate at the same time. The third bag feeding roller 431 needs to use an independent motor so as to control the speed of the three-level bag feeding mechanism to be lower than the speed of the first-level bag feeding mechanism.

[0055] In order to improve the third bag feeding roller 431's ability to receive and convey broken plastic bags, it is necessary to make the third bag feeding roller 431 have a larger outer surface so that it can contact the plastic bags. The diameter of the third bag feeding roller 431 is larger than the diameter of the first bag feeding roller 411, and the diameter of the first bag feeding roller 411 is equal to the diameter of the second bag feeding roller 422. This embodiment provides a design size for the diameter of the third bag feeding roller 431 and the first bag feeding roller 411. The diameter of the third bag feeding roller 431 is 2.5 to 3 times the diameter of the first bag feeding roller 411, and preferably 2.7 times.

[0056] In order to facilitate the loading of the continuous plastic bag, the first-level bag feeding mechanism also includes a bag clamping roller 414 and a first vertical adjustment cylinder 415. The bag clamping roller 414 is provided with two groups and is arranged up and down. The bag clamping roller 414 is located on the side of the first bag feeding roller 411 away from the secondary bag feeding mechanism. The fixed end of the first vertical adjustment cylinder 415 is connected to the machine base 1 and is located above the bag clamping roller 414. The pushing end of the first vertical adjustment cylinder 415 is connected to the first pressing block 416. The machine base 1 is provided with a first slide groove for sliding assembly with the first pressing block 416. The first vertical adjustment cylinder 415 controls the first pressing block 416. The block 416 is used to press the bag clamping roller 414 located above. The first vertical adjustment cylinder 415 and the first pressure block 416 are each provided with two groups and are respectively located at the two ends of the bag clamping roller 414. By controlling the up and down movement of the first vertical adjustment cylinder 415, the first clamping block 603 is controlled to press or loosen the bag clamping roller 414, thereby adjusting the gap between the two groups of bag clamping rollers 414 arranged above and below. When the upper group of bag clamping rollers 414 is loosened, it is convenient for the threading of the continuous plastic bag during feeding. After the upper group of bag clamping rollers 414 is clamped, it is convenient for the normal transportation of the continuous plastic bag.

[0057] To further facilitate the wearing of the strip-shaped plastic bag on the three-stage bag feeding mechanism, the three-stage bag feeding mechanism also includes a second vertical adjustment cylinder 432, the fixed end of the second vertical adjustment cylinder 432 is connected to the machine base 1 and is located above the third bag feeding roller 431, the pushing end of the second vertical adjustment cylinder 432 is connected to the second pressing block 433, the machine base 1 is provided with a second slide groove for slidingly assembling with the second pressing block 433, the second vertical adjustment cylinder 432 controls the second pressing block 433 to press the third bag feeding roller 431 located above, and the second vertical adjustment cylinder 432 and the second pressing block 433 are both provided with a second slide groove for slidingly assembling with the second pressing block 433. There are two groups of third bag feeding rollers 431, one at each end. When the strip-shaped plastic bag is loaded, the second vertical adjustment cylinder 432 is controlled to contract, so that the second pressing block 433 is away from the third bag feeding roller 431, thereby increasing the gap between the two groups of third bag feeding rollers 431 arranged up and down, so as to facilitate the threading of the strip-shaped plastic bag. After the threading is completed, the second vertical adjustment cylinder 432 is controlled to extend, so that the second pressing block 433 presses the third bag feeding roller 431, so that the two groups of third bag feeding rollers 431 arranged up and down clamp the strip-shaped plastic bag, which is convenient for conveying it after rotation.

[0058] In order to improve the stability of the stacked plastic bag reel and reduce the possibility that two adjacent stacked plastic bags will become unstacked and unable to be reeled continuously, the present embodiment also includes an electrostatic generator 101, an upper cover mechanism, and a lower lifting mechanism. The electrostatic generator 101 is installed between the three-stage bag feeding mechanism and the reeling mechanism to emit static electricity to the plastic bags on the conveyor belt 441. The upper cover mechanism is located between the electrostatic generator 101 and the reeling mechanism. The upper cover mechanism includes a blowing hood 501, which is rotatably assembled with the machine base 1 and is used to cover the bag receiving roller 301. The bottom surface of the blowing hood 501 on the side away from the three-stage bag feeding mechanism is provided with a blowing hole 5011, and the inner wall of the blowing hood 501 is arranged in an arc shape. The lower lifting mechanism includes a bag lifting roller 601, which is located below the conveyor belt 441 and is used to lift the conveyor belt 441 toward the bag receiving roller 301. By providing the electrostatic generator 101, static electricity is emitted to the plastic bag, so that when the bag receiving roller 301 rotates to reel , two adjacent plastic bags can be electrostatically attracted to each other, thereby reducing the risk of unstackage and unwinding. When rewinding, the blowing hood 501 rotates toward the bag collecting roller 301 and is covered on the bag collecting roller 301. The bag collecting roller 301 absorbs the plastic bag and rotates, so that the packaging bag generates a rotating centrifugal force and has a tendency to escape from the bag collecting roller 301. By providing the blowing hood 501, the plastic bag is limited between the blowing hood 501 and the bag collecting roller 301. At the same time, the blowing of the blowing hood 501 forms The air curtain reduces the possibility of the plastic bag escaping from between the blowing hood 501 and the conveyor belt 441, and improves the stability and continuity of the plastic bag winding. Furthermore, during winding, the conveyor belt 441 is lifted by the bag lifting roller 601 and moves toward the bag receiving roller 301, so that the conveyor belt 441 forms an upward curved arc, so that the plastic bag has a tendency to move upward during the forward movement and is wound around the bag receiving roller 301, which facilitates the bag receiving roller 301 to absorb the plastic bag on the winding conveyor belt 441.

[0059] In terms of the specific structure of the upper cover mechanism, the upper cover mechanism also includes an upper roller shaft 502, an upper cover gear 503, an upper cover rack 504, and an upper cover pushing cylinder 505. The blowing hood 501 is connected to the upper roller shaft 502, the upper roller shaft 502 is axially connected to the upper cover gear 503, the upper cover gear 503 is engaged with the upper cover rack 504 for transmission, the upper cover rack 504 is slidably assembled with the machine base 1 through a slide rail slider structure, the fixed end of the upper cover pushing cylinder 505 is connected to the machine base 1, and the connecting end of the upper cover pushing cylinder 505 is connected to the upper cover rack 504. The upper cover pushing cylinder 505 is used to push the upper cover rack 504 back and forth, and the upper cover gear 503 converts the linear motion of the upper cover rack 504 into the rotational motion of the upper roller shaft 502, thereby driving the blowing hood 501 to rotate back and forth toward the bag collecting roller 301.

[0060] Furthermore, in order to improve the tightness of stacking between two adjacent plastic bags during the process of the plastic bags moving from the three-stage bag feeding mechanism to the winding mechanism, the upper cover mechanism also includes an upper glue roller 506, a lower iron roller 507, and a lower pressure cylinder 508. The upper glue roller 506 is rotatably assembled with the upper shaft roller and is located below the blow hood 501. The lower iron roller 507 is rotatably assembled with the machine base 1 and is located below the conveyor belt 441. The lower iron roller 507 is located directly below the upper glue roller 506. The fixed end of the lower pressure cylinder 508 is connected to the machine base 1. The push end of the downward pressure cylinder 508 is connected to the upper roller shaft 502, which is used to control the upper roller shaft 502 to move up and down toward the upper cover rack 504. When winding, the downward pressure cylinder 508 pushes the upper roller shaft 502 to move toward the upper cover rack 504, so that the upper cover gear 503 is engaged with the upper cover rack 504. The upper glue roller 506 and the bag lifting roller 601 are respectively located on both sides of the radial direction of the bag collecting roller 301. The upper glue roller 506 has a limiting and downward pressing effect on the upward moving plastic bags to prevent the stacked plastic bags from loosening.

[0061] In terms of the specific structure of the lower lifting mechanism, the lower lifting mechanism also includes a lower lifting push cylinder 602, a clamping block 603, a connecting shaft 604, two groups of connecting parts, and the two ends of the axis of the bag lifting roller 601 are respectively connected with connecting parts, the connecting parts are connected to the connecting shaft 604, the connecting shaft 604 is rotatably assembled with the machine base 1, one end of the clamping block 603 is connected to the connecting shaft 604, and the other end of the clamping block 603 is connected to the pushing end of the lower lifting push cylinder 602, and the fixed end of the lower lifting push cylinder 602 is connected to the machine base 1. Through the push of the lower lifting push cylinder 602, the bag lifting roller 601 pushes the conveyor belt 441 to move back and forth toward the bag collecting roller 301.

[0062] After the bag collecting roller 301 completes the winding of the plastic bag, in terms of realizing the automatic unloading of the newly rolled plastic bag, this embodiment also includes a unloading mechanism for pushing the rolled plastic bag to slide off the bag collecting roller 301. The unloading mechanism includes two sets of turntables 701, two sets of brackets 702, and two sets of guide rods 703. The axes of the two sets of guide rods 703 are parallel to the axes of the bag collecting roller 301, and the two sets of guide rods 703 are arranged at intervals. One end of the bracket 702 is slidably assembled with the two sets of guide rods 703, and the other end of the bracket 702 is rotatably assembled with the turntable 701. The two sets of turntables 701 and the bag collecting roller are assembled. The two sets of turntables 701 are coaxially arranged, with two sets of rotating disks 701 located at either end of the bag-collecting roller 301. A clearance hole 7011 is provided at the axis of the rotating disks 701 to allow the roll to clear the bag-collecting roller 301. During rewinding, the two sets of rotating disks 701 approach each other and are located at either end of the axis of the rolled plastic bag, limiting the rewinding of the plastic bag and ensuring that both ends of the rolled plastic bag are flat. After rewinding is completed, the rotating disks 701 move away from the rewinding servo motor, pushing the rolled plastic bag along the axis of the bag-collecting roller 301 until it disengages from the roller 301, completing the unloading of the rolled plastic bag. The machine base 1 has a discharge port 102, located near and below the bag-collecting roller 301. The unloading mechanism pushes the rolled plastic bag toward the discharge port 102.

[0063] In terms of the specific structure of the automatic sliding of the bracket 702 and the guide rod 703, the unloading mechanism also includes a chain window opener 704, which is driven by a motor to rotate the chain window opener 704, thereby pushing the bracket 702. Compared with the method of using a cylinder to push, it can reduce the space occupied by the cylinder push rod of the cylinder. This embodiment provides a specific chain window opener 704 model, which is Huayate's HYT-SL505.

[0064] The bag collecting roller 301 is arranged to be as close to the conveyor belt 441 as possible to the bag collecting roller 301 so as to be able to better absorb the bag on the conveyor belt 441 and then reel it in. However, when the bag collecting roller 301 is close to the conveyor belt 441, the number of reeled layers is limited, which makes the diameter of the rolled plastic bag small and affects normal use. Therefore, the reeling mechanism needs to be able to move up and down to meet the needs of automatic reeling. In terms of the specific structure for realizing the up and down movement of the reeling mechanism, this embodiment also includes a lifting mechanism, which includes a movable frame 801 and a lifting cylinder 802. The movable frame 801 is arranged in a U shape, and the two side plates of the movable frame 801 are respectively located on both sides of the conveyor belt 441. The lifting cylinder 802 is located below the conveyor belt 441 and is used to push the movable frame 801 up and down. The reeling mechanism and the unloading mechanism are both installed on the movable frame 801. 01 is assembled with the machine base 1 through the sliding rail slider structure. The lifting cylinder 802 is provided with two groups and is arranged on the two side plates close to the mobile frame 801. The fixed end of the lifting cylinder 802 is connected to the machine base 1, and the pushing end of the lifting cylinder 802 is connected to the bottom wall of the mobile frame 801. There are eight groups of sliding rail sliders. Each side plate of the mobile frame 801 is connected with four groups of sliders, and the four groups of sliders are arranged at equal intervals up and down and left and right, thereby improving the stability of the mobile frame 801 on the winding mechanism and the unloading mechanism. Qualitatively, when the bag collecting roller 301 is rewinding, the lifting cylinder 802 is in a reset state, causing the bag collecting roller 301 to move down close to the conveyor belt 441, thereby ensuring that the plastic bags on the conveyor belt 441 can be smoothly adsorbed by the bag collecting roller 301 and rewound. As the number of layers rewound by the bag collecting roller 301 increases, the lifting cylinder 802 moves upward, thereby ensuring that the bag collecting roller 301 can rewind multiple layers of plastic bags, thereby increasing the number of rolled plastic bags, and improving the degree of automation and adaptability of plastic bag rewinding.

[0065] After the plastic bag is rolled up, it may come off the roll during transportation or transfer by relying solely on electrostatic adsorption, causing the plastic bag to scatter. Therefore, in the prior art, a labeling machine 901 is used to label the outermost layer of the rolled plastic bag. On the one hand, the opening of the rolled plastic bag can be glued tightly to prevent it from coming off the roll, and on the other hand, advertising slogans can be printed on the label to play a promotional role. However, if the rolled plastic bag on the bag collection roller 301 is labeled before being unloaded, the continuity of the rolling process will be affected, and the first-level bag feeding mechanism, the second-level bag feeding mechanism, the third-level bag feeding mechanism, and the fourth-level bag feeding mechanism will all have to stop running and wait, resulting in low processing efficiency. If the rolled plastic bag on the bag collection roller 301 is unloaded before being labeled, the processing continuity will be affected, and the labeling machine 901 needs to be re-equipped for labeling. In order to solve the above technical problems, this embodiment also includes a labeling machine 9 01 structure, the upper cover mechanism, the winding mechanism, the lower lifting mechanism, the jacking mechanism, and the unloading mechanism are provided with at least two groups, and are arranged at intervals along the moving direction of the conveyor belt 441. The labeling machine 901 structure includes a labeling machine 901, a labeling rack, a labeling gear 903, and a rotating motor 904. The labeling machine 901 is slidably assembled on the machine base 1 and is used to label the rolled plastic bags on multiple groups of winding mechanisms. The labeling rack is connected to the top wall of the machine base 1, the labeling gear 903 is axially connected to the rotating end of the rotating motor 904, and the fixed end of the rotating motor 904 is connected to the labeling machine 901. The labeling gear 903 is meshed with the labeling rack for transmission. The labeling machine and the machine base 1 are slidably assembled through a slide rail slider structure. The rotation of the labeling gear 903 is controlled by the rotating motor 904, so that the labeling machine moves back and forth along the multiple winding mechanisms, thereby completing the actions of alternating labeling and alternating winding, reducing the impact of the labeling process on the winding process.

[0066] Preferably, this embodiment is provided with two groups of upper cover mechanisms, two groups of winding mechanisms, two groups of lower lifting mechanisms, two groups of jacking mechanisms and two groups of unloading mechanisms, and are arranged at equal intervals along the forward direction of the conveyor belt 441. The two groups of winding mechanisms are respectively the first winding mechanism and the second winding mechanism, and the two groups of lower lifting mechanisms are respectively the first lower lifting mechanism and the second lower mechanism. When the first winding mechanism completes winding the plastic bag, the blowing hood 501 flips over and moves away from the bag receiving roller 301. The rotating motor 904 rotates so that the labeling machine is located on the bag receiving roller 301 of the first winding mechanism, and is used to label the rolled plastic bag. After the label is affixed, the unloading mechanism pushes the rolled plastic bag on the bag receiving roller 301 to unload, thereby completing the processing of the pull-out plastic bag. At the same time, a The first-level bag feeding mechanism, the second-level bag feeding mechanism, the third-level bag feeding mechanism and the fourth-level bag feeding mechanism continue to operate. It is worth mentioning that after the first winding mechanism completes winding, the bag lifting roller 601 of the first lower lifting mechanism will move away from the conveyor belt 441, and release the plastic bag on the conveyor belt 441, so that the plastic bag is transported to the second winding mechanism by the conveyor belt 441, and the corresponding bag lifting roller 601 of the lower lifting mechanism will rise, so that the winding roller of the second winding mechanism can rewind the plastic bag. After the winding is completed, the labeling machine slides to the second winding mechanism and labels the rolled packaging bags on the bag receiving roller 301. The operation is repeated and alternating to ensure the continuity of the pull-out plastic bag winding process, thereby improving the winding efficiency and automation level of the plastic bags.

[0067] It should be noted that the labeling machine is a conventional device in the field of plastic bag winding. In this embodiment, the selected labeling machine can be used to stick adhesive label paper onto the plastic bag.

[0068] Example 2: A method for rolling a removable plastic bag, comprising the removable plastic bag rolling device described in Example 1, and performing the rolling process by the following steps:

[0069] S1. Loading the strip of plastic bags: The strip of plastic bags passes through the first, second, and third feeding mechanisms in sequence;

[0070] S2. Cutting the Plastic Bags in a Strand: The primary, secondary, tertiary, and quaternary bag-cutting mechanisms operate. The bag-cutting mechanisms rotate to separate the plastic bags from the strand. The tertiary bag-feeding mechanism rotates at a low speed, stacking the bags sequentially for transport.

[0071] S3. Pull-out plastic bags are alternately wound: the winding mechanism includes a first winding mechanism and a second winding mechanism arranged in a front-to-back manner, and the unloading mechanism includes a first unloading mechanism and a second unloading mechanism arranged in a front-to-back manner. After the first winding mechanism winds up the plastic bags stacked on the conveyor belt, the labeling mechanism performs labeling, and the first unloading mechanism unloads the rolled plastic bags on the first winding mechanism. At the same time, the second winding mechanism winds up the plastic bags stacked on the conveyor belt, and then the labeling mechanism performs labeling, and the second unloading mechanism unloads the rolled plastic bags on the second winding mechanism, and the operation is repeated and alternating.

[0072] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A removable plastic bag winding device, characterized by: The bag-feeding machine comprises a machine base, a bag-breaking mechanism, a winding mechanism, an electrostatic generator, an upper cover mechanism, a lower lifting mechanism, and a labeling mechanism. The machine base is sequentially rotated and equipped with a first-level bag-feeding mechanism, a second-level bag-feeding mechanism, a third-level bag-feeding mechanism, and a fourth-level bag-feeding mechanism. The first-level bag-feeding mechanism is used to convey continuous plastic bags, the second-level bag-feeding mechanism is used to convey a single plastic bag to be disconnected from the continuous plastic bag, the third-level bag-feeding mechanism is used to convey and stack two adjacent plastic bags, the first-level bag-feeding mechanism and the second-level bag-feeding mechanism rotate synchronously, the rotation speed of the third-level bag-feeding mechanism is lower than the rotation speed of the first-level bag-feeding mechanism, the bag-breaking mechanism rotates around the second-level bag-feeding mechanism and is used to break the plastic bag between the first-level bag-feeding mechanism and the second-level bag-feeding mechanism and / or the plastic bag between the second-level bag-feeding mechanism and the third-level bag-feeding mechanism, the fourth-level bag-feeding mechanism comprises a conveyor belt, and the conveyor belt is used to The lower lifting mechanism includes a bag lifting roller, which is located below the conveyor belt and is used to lift the conveyor belt toward the bag collecting roller.

2. The pull-out plastic bag winding device according to claim 1, characterized in that: The first-level bag feeding mechanism includes a first bag feeding roller and a rubber ring. The first bag feeding roller is provided in an even number. The axes of the multiple groups of the first bag feeding rollers are parallel and spaced apart up and down and left and right. The first bag feeding rollers are rotatably assembled with the machine base. The multiple groups of the first bag feeding rollers are driven by pulleys and belts. The outer ring wall of the first bag feeding roller is provided with several groups of annular grooves. The rubber ring is arranged in the annular grooves of the multiple groups of the first bag feeding rollers, and part of the rubber ring is exposed on the outer ring wall of the first bag feeding roller.

3. The pull-out plastic bag winding device according to claim 1, characterized in that: The secondary bag feeding mechanism includes a connecting disk, a second bag feeding roller, and a bag pressing roller. The second bag feeding roller is rotatably assembled with the connecting disk. The connecting disk is provided with two groups and is respectively located at both ends of the axis of the second bag feeding roller. The connecting disk is connected to the machine base. The second bag feeding roller is provided with an even number of groups. The axes of multiple groups of second bag feeding rollers are parallel and arranged at intervals up and down and left and right. Multiple groups of second bag feeding rollers are driven by pulleys and belts. The bag pressing roller is slidably assembled with the connecting disk to adjust the pressing force on the plastic bag.

4. The pull-out plastic bag winding device according to claim 3, characterized in that: The bag breaking mechanism includes a rotating ring, a counterweight, and a bag breaking shaft. The connecting disk is arranged in a circular shape, and multiple groups of the second bag feeding rollers are symmetrically arranged along the center of the connecting disk. There are two groups of rotating rings, and the two groups of rotating rings are respectively coaxially rotated and assembled with the connecting disk. The outer ring wall of the rotating ring begins to have a synchronous belt groove, and the rotating ring is driven by a synchronous belt. The two ends of the counterweight are respectively connected between the two groups of rotating rings. The bag breaking shaft is rotatably assembled with the counterweight, and the bag breaking shaft is located on the side of the counterweight close to the plastic bag in the rotation direction of the counterweight. There are two groups of counterweights and the bag breaking shaft and they are arranged in the same diameter direction of the connecting disk.

5. The pull-out plastic bag winding device according to claim 1, characterized in that: The three-stage bag feeding mechanism includes a third bag feeding roller, and the four-stage bag feeding mechanism also includes a driven roller. The third bag feeding roller is rotatably assembled with the machine base. Two groups of third bag feeding rollers are provided. The two groups of third bag feeding rollers are arranged up and down and are located between the two-stage bag feeding mechanism and one side of the winding mechanism. The driven roller is rotatably assembled with the machine base and is located on the other side of the winding mechanism. The conveyor belt is arranged between the third bag feeding roller and the driven roller located below. The third bag feeding roller located below is driven by a pulley and a belt.

6. The pull-out plastic bag winding device according to claim 1, characterized in that: The bag-collecting roller is a bag-collecting roller that is used to collect bags of plastic. The bag-collecting roller is a bag-collecting roller that is used to collect bags of plastic. The bag-collecting roller is a bag-collecting roller that is used to collect bags of plastic. The bag-collecting roller is a bag-collecting roller that is used to collect bags of plastic. The bag-collecting roller is a bag-collecting roller that is used to collect bags of plastic.

7. The pull-out plastic bag winding device according to claim 6, characterized in that: It also includes a lifting mechanism, which includes a movable frame and a lifting cylinder. The movable frame is U-shaped, and the two side plates of the movable frame are respectively located on both sides of the conveyor belt. The lifting cylinder is located below the conveyor belt and is used to push the movable frame up and down. The winding mechanism and the unloading mechanism are both installed on the movable frame, and the movable frame is slidably assembled with the machine base.

8. The pull-out plastic bag winding device according to claim 7, characterized in that: The upper cover mechanism, the winding mechanism, the lower lifting mechanism, the lifting mechanism, and the unloading mechanism are provided in at least two groups and are spaced apart along the moving direction of the conveyor belt. The labeling mechanism includes a labeling machine, a labeling rack, a labeling gear, and a rotating motor. The labeling machine is slidably assembled on the machine base and is used to label multiple groups of rolled plastic bags on the winding mechanism. The labeling rack is connected to the top wall of the machine base, the labeling gear is axially connected to the rotating end of the rotating motor, the fixed end of the rotating motor is connected to the labeling machine, and the labeling gear is meshed with the labeling rack for transmission.

9. A method for rolling up a removable plastic bag, characterized in that: The invention comprises a removable plastic bag winding device according to claim 8, wherein the rewinding is performed by the following steps: S1. Loading the strip of plastic bags: The strip of plastic bags passes through the first, second, and third feeding mechanisms in sequence; S2. Cutting the Plastic Bags in a Strand: The primary, secondary, tertiary, and quaternary bag-cutting mechanisms operate. The bag-cutting mechanisms rotate to separate the plastic bags from the strand. The tertiary bag-feeding mechanism rotates at a low speed, stacking the bags sequentially for transport. S3. Pull-out plastic bags are alternately wound: the winding mechanism includes a first winding mechanism and a second winding mechanism arranged in a front-to-back manner, and the unloading mechanism includes a first unloading mechanism and a second unloading mechanism arranged in a front-to-back manner. After the first winding mechanism winds up the plastic bags stacked on the conveyor belt, the labeling mechanism performs labeling, and the first unloading mechanism unloads the rolled plastic bags on the first winding mechanism. At the same time, the second winding mechanism winds up the plastic bags stacked on the conveyor belt, and then the labeling mechanism performs labeling, and the second unloading mechanism unloads the rolled plastic bags on the second winding mechanism, and the operation is repeated and alternating.

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