Automatic displacement winding device

Abstract

The utility model relates to the technical field of plastic processing, in particular to an automatic displacement winding device which comprises an unwinding mechanism and a winding trolley, the unwinding mechanism is used for transporting plastic films, the winding trolley is used for winding the plastic films transported by the unwinding mechanism on a winding roller, and the winding roller is installed on a frame. The unwinding mechanism is provided with a pressing plate, the pressing plate abuts against the outer side of the winding roller wound with the plastic film, and the pressing plate is connected with a pressure detection unit used for measuring the numerical value of the counter-acting force applied to the pressing plate by the plastic film and the winding roller. When the unwinding device is used, the driving motor connected with the lead screw is started to drive the unwinding mechanism to move towards one side far away from the winding trolley, and the value of the pressure detection unit drops, so that the pressure of the pressing plate on the winding roller is kept within a certain range; and wrinkles on the outer surface of the plastic film caused by excessive pressure on the plastic film on the winding roller are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic processing, and particularly relates to an automatic displacement winding device. Background Art

[0002] Films made from polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins are used for packaging and as coatings. Plastic packaging and plastic packaging products are increasingly occupying a larger share of the market, especially composite plastic flexible packaging, which has been widely used in the fields of food, medicine, and chemical industry.

[0003] During the transportation process, the plastic film usually needs to be wound around the winding roller in the winding car. After the winding roller on a single winding car completes the winding work, a new winding car is replaced.

[0004] During the process of winding the plastic film by a winding vehicle, in order to keep the plastic film in contact with the winding roller, a pressing mechanism is provided near the winding roller. The pressing mechanism can squeeze the plastic film and the winding roller, so that the plastic film always sticks to the winding roller during the winding process. However, as the thickness of the plastic film wound by the winding roller increases, the gap between the pressing mechanism and the plastic film shortens, and the pressure exerted by the pressing mechanism on the plastic film increases. Excessive pressure can easily cause wrinkles in the plastic film, which will deteriorate the tensile strength of the wrinkled plastic film. In addition, when the wrinkled plastic film is wound on the winding roller, there will be small gaps between the plastic film loops on the winding roller, which will result in the plastic film being loosely wound. Therefore, the present application proposes an automatic displacement winding device. Utility Model Content

[0005] The purpose of the present invention is to provide an automatic displacement winding device to solve the problems raised by the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an automatic displacement winding device, comprising a reeling mechanism and a reeling vehicle, wherein the reeling mechanism is used to transport plastic film, and the reeling vehicle is used to reel the plastic film transported by the reeling mechanism onto a reeling roller, which is mounted on a vehicle frame;

[0007] The unwinding mechanism is provided with a pressing plate, which is pressed against the outside of the winding roller wrapped with the plastic film. The pressing plate is connected to a pressure detection unit for measuring the reaction force exerted on the pressing plate by the plastic film and the winding roller. The pressure detection unit is mounted on a detection bracket, which is connected to the unwinding frame in the unwinding mechanism.

[0008] A threaded slider is installed at the lower end of the unwinding frame. The threaded slider is connected to the lead screw through a thread. The lead screw is inserted into the main track, and the threaded slider can move along the main track. At the same time, the lead screw is connected to a drive motor for driving it to rotate forward and reverse.

[0009] Preferably, two casters with brake functions are installed at the front end of the frame, and two columns are installed at the rear end.

[0010] Preferably, an auxiliary slider is installed on the lower side of the unwinding frame, the auxiliary slider is connected to the auxiliary track, and the main track and the auxiliary track are both installed on the bottom plate.

[0011] Preferably, two unwinding racks are provided, and a plurality of conveying rollers for transporting the plastic film are interspersed between the two unwinding racks, and the two unwinding racks are connected by two parallel distributed square tubes.

[0012] Preferably, a cutting unit is installed on the unwinding frame, and the cutting unit includes a cutting base plate, which is located on the lower side of the plastic film and is connected to the unwinding frame through two cutting brackets.

[0013] Preferably, a guide roller is installed on the cutting base plate, the guide roller is connected to the bearing seat in the cutting base plate through a bearing, a guide groove runs through the guide roller, and the guide roller is connected to a power motor for driving the guide roller to rotate.

[0014] Preferably, the power motor allows the guide roller to have at least two states including a material guiding state and a cutting state. When the guide roller is in the material guiding state, the guide groove is parallel to the plastic film at the guide roller.

[0015] Preferably, when the guide roller is in the cutting state, the guide groove is perpendicular to the plastic film at the guide roller, and at this time, the guide groove is aligned with the cutting knife.

[0016] Preferably, the cutting knife is connected to a lifting unit for driving it to move in a direction perpendicular to the moving direction of the plastic film at the guide roller, and the maximum stroke of the cutting knife driven by the lifting unit is greater than the depth of the guide groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In the present invention, after the frame remains stable, the plastic film transported by the unwinding mechanism is wound around the winding roller in the winding car, and the winding roller rotates, thereby winding the plastic film thereon. At this time, the pressure plate is against the outer surface of the winding roller, allowing the plastic film to adhere to the outer surface of the winding roller. As the winding roller rotates, the thickness of the plastic film thereon gradually increases, and the value measured by the pressure detection unit increases. The drive motor connected to the lead screw is started, and it drives the unwinding mechanism to move to the side away from the winding car, so that the value of the pressure detection unit drops, thereby keeping the pressure of the pressure plate on the winding roller within a certain range, avoiding excessive pressure on the plastic film on the winding roller, which may cause wrinkles on the outer surface of the plastic film.

[0019] 2. The utility model sets the guide roller in two states: a guiding state and a cutting state. Only when the guide roller is in the cutting state can the cutter move along the guide groove. At this time, the plastic film located on the upper side of the cutting base plate can be cut. In this way, protection is provided for the start-up of the cutter, avoiding misoperation of the cutter, thereby cutting the plastic film in advance, and being able to cut the plastic film, which facilitates the separation between the winding car and the unwinding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the structural schematic diagrams of the automatic displacement winding device in the present invention.

[0021] Figure 2 This is the second structural diagram of the automatic displacement winding device in the present invention.

[0022] Figure 3 This is the third structural diagram of the automatic displacement winding device in the present invention.

[0023] Figure 4 It is a structural schematic diagram of the threaded slider and the auxiliary slider in the utility model.

[0024] Figure 5 It is a structural diagram of the cutting unit in the utility model.

[0025] In the figure: 1. Unwinding mechanism; 101. Unwinding frame; 2. Rewinding car; 3. Pressing plate; 4. Pressure detection unit; 5. Threaded slider; 6. Lead screw; 7. Main track; 8. Auxiliary slider; 9. Auxiliary track; 10. Bottom plate; 11. Cutting unit; 1101. Cutting bottom plate; 1102. Guide roller; 1103. Guide groove; 1104. Cutting knife; 1105. Lifting unit. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figure 1-Figure 5 An automatic displacement winding device includes a unwinding mechanism 1 and a winding trolley 2. The unwinding mechanism 1 is used to transport plastic film, and the winding trolley 2 is used to roll the plastic film transported by the unwinding mechanism 1 onto a winding roller. The winding roller is installed on a frame, and two casters with brake functions are installed at the front end of the frame, and two columns are installed at the rear end. When moving, press the front end of the frame to let the two casters support the ground, and move the winding trolley 2 to the position of winding the film. During the process of rolling the plastic film, the frame needs to remain stable, so the two columns support the ground and the casters are braked.

[0028] In order to keep the plastic film in contact with the winding roller during the winding process, a pressure plate 3 is installed on the unwinding mechanism 1. The pressure plate 3 is pressed against the outside of the winding roller wrapped with the plastic film. The pressure plate 3 is connected to a pressure detection unit 4 for measuring the reaction force value given by the plastic film and the winding roller to the pressure plate 3. The pressure detection unit 4 is installed on a detection bracket, and the detection bracket is connected to the unwinding frame 101 in the unwinding mechanism 1.

[0029] As the thickness of the plastic film increases, if the distance of the pressing plate 3 remains unchanged, the squeezing force on the plastic film will increase, and excessive squeezing force will easily cause wrinkles on the plastic film. The wrinkled plastic film has poor tensile properties and surface flatness. Therefore, it is necessary to adjust the distance between the unwinding mechanism 1 and the winding car 2 in real time. In order to adjust the above-mentioned distance, a threaded slider 5 is installed at the lower end of the unwinding frame 101. The threaded slider 5 is connected to the screw 6 by a thread. The screw 6 is inserted into the main track 7, and the threaded slider 5 can move along the main track 7. At the same time, the screw 6 is connected to the drive motor for driving it to rotate forward and reverse.

[0030] The driving motor drives the lead screw 6 to rotate, and drives the threaded slider 5 to move through the threaded structure, thereby adjusting the position of the unwinding frame 101 and changing the distance between it and the winding car 2, so that the value measured by the pressure detection unit 4 remains stable, the squeezing force of the clamping plate 3 on the plastic film is relatively stable, and the wound plastic film will not be wrinkled due to excessive pressure.

[0031] During the movement of the unwinding rack 101, it is necessary to guide the direction of its movement to avoid it from tilting during use. Therefore, an auxiliary slider 8 is installed on the lower side of the unwinding rack 101, and the auxiliary slider 8 is connected to the auxiliary rail 9. The main rail 7 and the auxiliary rail 9 are both installed on the base plate 10. It should be mentioned that there are two unwinding racks 101, and several conveyor rollers for transporting plastic film are interspersed between the two unwinding racks 101. The two unwinding racks 101 are connected by two parallel square tubes.

[0032] The two unwinding racks 101 are connected together by a square tube, so that the two unwinding racks 101 can move synchronously during the movement. At the same time, an auxiliary track 9 parallel to the main track 7 is set on the side. The auxiliary track 9 can also provide restriction for the movement of the unwinding rack 101. Multiple components cooperate with each other to enable the unwinding rack 101 to move smoothly. During the movement, the plastic film on the conveyor roller is in a moving state. The smoothly moving unwinding rack 101 can keep the plastic film always in a straight state, and the plastic film will not bend during the movement.

[0033] After the winding roller on the winding car 2 is wound around the plastic film, it needs to be cut to separate the winding car 2 from the unwinding mechanism 1, and then a new winding car 2 is replaced. Therefore, a cutting unit 11 is installed on the unwinding frame 101. When the cutting unit 11 is started, the plastic film can be cut.

[0034] Specifically, the cutting unit 11 includes a cutting base plate 1101, which is located on the lower side of the plastic film. The cutting base plate 1101 is connected to the unwinding frame 101 through two cutting brackets, and a guide roller 1102 is installed on the cutting base plate 1101. The guide roller 1102 is connected to the bearing seat in the cutting base plate 1101 through a bearing. A guide groove 1103 runs through the guide roller 1102, and the guide roller 1102 is connected to a power motor for driving the guide roller 1102 to rotate.

[0035] More specifically, the power motor allows the guide roller 1102 to have at least two states, including a guiding state and a cutting state. When the guide roller 1102 is in the guiding state, the guide groove 1103 is parallel to the plastic film on the guide roller 1102. It should be noted that the guide groove 1103 and the guide roller 1102 are not perpendicular or close to the perpendicular direction. In this case, the smooth outer surface of the guide roller 1102 is in contact with the plastic film. The plastic film contacts the smooth outer surface during movement, resulting in relatively less wear.

[0036] It should be noted that when the guide roller 1102 is in the cutting state, the guide groove 1103 is perpendicular to the plastic film at the guide roller 1102. At this time, the guide groove 1103 is aligned with the cutting blade 1104.

[0037] The cutting knife 1104 is connected to a lifting unit 1105 for driving it to move in a direction perpendicular to the moving direction of the plastic film at the guide roller 1102. The maximum stroke of the cutting knife 1104 driven by the lifting unit 1105 is greater than the depth of the guide groove 1103, so that the cutting knife 1104 can be pulled out from the guide groove 1103.

[0038] By setting the guide roller 1102 to two states, namely, the material guiding state and the cutting state, the cutting knife 1104 can move along the guide groove 1103 only when the guide roller 1102 is in the cutting state. At this time, the plastic film located on the upper side of the cutting base plate 1101 can be cut. In this way, protection is provided for the start-up of the cutting knife 1104, avoiding misoperation of the cutting knife 1104, thereby cutting the plastic film in advance.

[0039] Working principle:

[0040] When the winding car 2 moves, press the front end of the frame to allow the two casters to support the ground, so as to move the winding car 2 to the position for winding the film. During the process of winding the plastic film, the frame needs to remain stable, so let the two columns support the ground and brake the casters.

[0041] After the frame is kept stable, the plastic film transported by the unwinding mechanism 1 is wound around the winding roller in the winding car 2, and the winding roller rotates, thereby winding the plastic film around it. At this time, the pressure plate 3 is against the outer surface of the winding roller, allowing the plastic film to fit onto the outer surface of the winding roller. As the winding roller rotates, the thickness of the plastic film thereon gradually increases, and the value measured by the pressure detection unit 4 increases. The drive motor connected to the screw 6 is started, and it drives the unwinding mechanism 1 to move to the side away from the winding car 2, allowing the value of the pressure detection unit 4 to fall, so that the pressure of the pressure plate 3 on the winding roller is kept within a certain range, avoiding excessive pressure on the plastic film on the winding roller, which may cause wrinkles on the outer surface of the plastic film.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic displacement winding device, comprising a winding mechanism (1) and a winding vehicle (2), characterized in that: The unwinding mechanism (1) is used to transport the plastic film, and the winding vehicle (2) is used to wind the plastic film transported by the unwinding mechanism (1) onto a winding roller, which is mounted on a vehicle frame; The unwinding mechanism (1) is provided with a pressing plate (3), the pressing plate (3) being pressed against the outside of a winding roller wound with a plastic film, the pressing plate (3) being connected to a pressure detection unit (4) for measuring the value of the reaction force exerted on the pressing plate (3) by the plastic film and the winding roller, the pressure detection unit (4) being installed on a detection bracket, and the detection bracket being connected to an unwinding frame (101) in the unwinding mechanism (1); A threaded slider (5) is installed at the lower end of the unwinding frame (101). The threaded slider (5) is connected to the lead screw (6) through a thread. The lead screw (6) is inserted into the main track (7), and the threaded slider (5) can move along the main track (7). At the same time, the lead screw (6) is connected to a driving motor for driving it to rotate forward and reverse.

2. The automatic displacement winding device according to claim 1, characterized in that: Two casters with brake functions are installed at the front end of the frame, and two columns are installed at the rear end.

3. The automatic displacement winding device according to claim 1, characterized in that: An auxiliary slider (8) is installed on the lower side of the unwinding frame (101), and the auxiliary slider (8) is connected to the auxiliary track (9). The main track (7) and the auxiliary track (9) are both installed on the bottom plate (10).

4. The automatic displacement winding device according to claim 3, characterized in that: The unwinding racks (101) are provided with two, and a plurality of conveying rollers for transporting plastic film are interspersed between the two unwinding racks (101). The two unwinding racks (101) are connected by two parallel distributed square tubes.

5. The automatic displacement winding device according to claim 1, characterized in that: A cutting unit (11) is installed on the unwinding frame (101), and the cutting unit (11) includes a cutting base plate (1101). The cutting base plate (1101) is located on the lower side of the plastic film, and the cutting base plate (1101) is connected to the unwinding frame (101) through two cutting brackets.

6. The automatic displacement winding device according to claim 5, characterized in that: A guide roller (1102) is installed on the cutting base plate (1101), and the guide roller (1102) is connected to a bearing seat in the cutting base plate (1101) through a bearing. A guide groove (1103) runs through the guide roller (1102), and the guide roller (1102) is connected to a power motor for driving the guide roller to rotate.

7. The automatic displacement winding device according to claim 6, characterized in that: The power motor allows the guide roller (1102) to have at least two states including a material guiding state and a cutting state. When the guide roller (1102) is in the material guiding state, the guide groove (1103) is parallel to the plastic film at the guide roller (1102).

8. The automatic displacement winding device according to claim 7, characterized in that: When the guide roller (1102) is in a cutting state, the guide groove (1103) is perpendicular to the plastic film at the guide roller (1102). At this time, the guide groove (1103) is aligned with the cutting knife (1104).

9. The automatic displacement winding device according to claim 8, characterized in that: The cutting knife (1104) is connected to a lifting unit (1105) for driving it to move in a direction perpendicular to the moving direction of the plastic film at the guide roller (1102), and the maximum stroke of the cutting knife (1104) driven by the lifting unit (1105) is greater than the depth of the guide groove (1103).

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