Film drawing device and plastic film manufacturing equipment

Abstract

The utility model relates to the technical field of plastic film manufacturing, and discloses a film-drawing device and plastic film manufacturing equipment, the film-drawing device comprises mounting racks, a film-drawing mechanism and a tension adjusting mechanism, the two mounting racks are respectively provided with an avoiding hole, the two avoiding holes are oppositely arranged, the film-drawing mechanism comprises a driving roller and a floating roller, and the driving roller and the floating roller are oppositely arranged. The two ends of the driving roller are rotationally connected with the two mounting frames correspondingly, the two ends of the floating roller penetrate through the two receding holes correspondingly, and the two tension adjusting mechanisms, the two mounting frames and the two ends of the floating roller are arranged in a one-to-one correspondence mode. According to the film drawing device and the plastic film manufacturing equipment, the tension adjusting mechanism is connected to the two ends of the floating roller and used for adjusting the distance between the floating roller and the driving roller, so that the floating roller and the driving roller are kept parallel, pressure borne by all parts of a plastic film is consistent, and then tension borne by all parts of the plastic film is consistent; the problem that the lengths of the two side edges of the plastic film are different is solved, and the quality of the plastic film is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film manufacturing, in particular to a film drawing device and plastic film manufacturing equipment. Background Art

[0002] During the manufacturing process of the plastic film, a film pulling mechanism is required to pull the plastic film out of the film ring for use in the next workstation.

[0003] In the related art, the film pulling mechanism includes a fixed frame, an active roller, a floating roller and a spring. The active roller is connected to the fixed frame, the floating roller is movably arranged on the fixed frame, the plastic film is arranged in a feeding channel formed between the floating roller and the active roller, and the spring is respectively connected to the fixed frame and the floating roller to pull the floating roller to make the plastic film abut against the active roller, that is, the plastic film is clamped between the floating roller and the active roller.

[0004] However, due to the inconsistent spring tension at both ends of the floating roller, the gaps at both ends of the feeding channel are inconsistent, causing the floating roller to be non-parallel to the active roller when clamping the plastic film, which in turn causes the plastic film to be subjected to different pressures at different locations, causing the plastic film to be subjected to different tensions at different locations, which can easily cause one side of the pulled plastic film to be longer and the other side to be shorter. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a film-drawing device and a plastic film manufacturing equipment, so that the floating roller and the active roller remain parallel, so that the pressure exerted on the plastic film at various locations is consistent, and thus the pulling force exerted on the plastic film at various locations is consistent, avoiding the problem of different lengths on both sides of the plastic film and improving the quality of the plastic film.

[0006] The technical effects to be achieved by the utility model are achieved through the following aspects:

[0007] In a first aspect, the utility model provides a film drawing device, comprising:

[0008] A mounting frame, wherein each of the two mounting frames is provided with a position avoidance hole, and the two position avoidance holes are arranged opposite to each other;

[0009] The film-pulling mechanism comprises an active roller and a floating roller, wherein two ends of the active roller are respectively rotatably connected to the two mounting frames, and two ends of the floating roller are respectively inserted into the two avoidance holes; and

[0010] A tension adjustment mechanism, wherein the two tension adjustment mechanisms, the two mounting frames and the two ends of the floating roller are arranged in a one-to-one correspondence;

[0011] Among them, the tension adjustment mechanism includes a fixed part, a telescopic part, a connecting rod and an elastic part. The fixed part is fixedly connected to the mounting frame, the telescopic part is movably connected to the fixed part, one end of the connecting rod is rotatably connected to the mounting frame, the other end of the connecting rod is connected to one end of the floating roller, and the elastic part is respectively connected to the telescopic part and the connecting rod.

[0012] In some implementations, the fixing member is formed with a communicating movable groove and a connecting hole, the telescopic member includes a sliding portion and an adjusting portion, the sliding portion is slidably arranged in the movable groove, the sliding portion is connected to the elastic member, the adjusting portion is fixedly connected to the sliding portion, and the adjusting portion is also located in the connecting hole and is threadedly connected to the fixing member.

[0013] In this implementation, when the film pulling mechanism is performing film pulling work, the adjusting part of the telescopic part is rotated to make the sliding part move in the movable groove, thereby increasing or decreasing the elastic force of the elastic part. The adjusting part is rotated until the pulling force on both ends of the floating roller is the same and approaches the active roller in parallel.

[0014] In some implementations, the tension adjustment mechanism also includes a connecting piece, which is fixedly connected to the telescopic piece. One end of the elastic piece is sleeved on the connecting piece so that the elastic piece is connected to the telescopic piece through the connecting piece, and the other end of the elastic piece is fixedly connected to the connecting rod.

[0015] In some implementations, each of the tension adjustment mechanisms includes multiple elastic members.

[0016] In some implementations, the active roller includes:

[0017] A movable roller body, both ends of which are rotatably connected to the two mounting frames respectively; and

[0018] The first elastic sleeve is sleeved on the movable roller body.

[0019] In some implementations, the floating roller includes:

[0020] A floating roller body, two ends of which are respectively passed through the two avoidance holes and are respectively connected to the connecting rods; and

[0021] The second elastic sleeve is sleeved on the floating roller body.

[0022] In this implementation, the second elastic sleeve is elastic, which increases the friction force on the plastic film when clamping the plastic film together with the active roller, thereby avoiding the phenomenon of plastic film slippage during the film pulling process by the film pulling mechanism; and the second elastomer also plays a role in protecting the plastic film, so that the plastic film is not damaged during the process of being clamped by the active roller and the floating roller.

[0023] In some implementations, the floating roller further includes a limiter and a cam, the limiter is fixedly connected to the mounting frame, the cam is fixedly sleeved on the floating roller body, and the outer side surface of the cam abuts against the limiter.

[0024] In some implementations, the floating roller further includes a rotating rod connected to a terminal end of the floating roller body.

[0025] Furthermore, the sliding portion and the fixing member are clearance-matched.

[0026] In a second aspect, the utility model provides a plastic film manufacturing device, comprising the film drawing device.

[0027] In summary, the utility model has at least the following benefits:

[0028] The utility model provides a film-drawing device, in which a plastic film is passed between an active roller and a floating roller, the floating roller and the active roller clamp the plastic film, and the plastic film is conveyed by the rotation of the floating roller and the active roller, and a tension adjustment mechanism is connected to both ends of the floating roller and is used to adjust the spacing between the floating roller and the active roller, so that the floating roller and the active roller remain parallel, so that the pressure on the plastic film is consistent at various locations, and further the tension on the plastic film is consistent at various locations, thus avoiding the problem of different lengths of two sides of the plastic film and improving the quality of the plastic film. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the film drawing device in some embodiments;

[0030] Figure 2 for Figure 1 A partial enlarged view of the film-drawing device at position A shown;

[0031] Figure 3 for Figure 1 A partial cross-sectional view of the film-drawing device shown;

[0032] Figure 4 for Figure 1 Another structural schematic diagram of the film-drawing device shown;

[0033] Figure 5 for Figure 4 A partial enlarged view of the film-drawing device at position B shown;

[0034] Figure 6 for Figure 4 A partial enlarged view of the film pulling device at position C is shown.

[0035] Markings in the figure:

[0036] 10. Film pulling device;

[0037] 100, mounting frame; 101, avoidance hole;

[0038] 200, film pulling mechanism; 210, active roller; 211, movable roller body; 212, first elastic sleeve; 220, floating roller; 221, floating roller body; 2211, groove; 222, second elastic sleeve; 223, stopper; 224, cam; 225, rotating rod;

[0039] 300, tension adjustment mechanism; 310, fixing member; 311, movable groove; 312, connecting hole; 320, telescopic member; 321, sliding part; 322, adjusting part; 330, connecting rod; 340, elastic member; 350, connecting member. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1:

[0043] Please see attached Figures 1 to 3 The film-pulling device 10 of the present invention comprises a mounting frame 100 , a film-pulling mechanism 200 and a tension adjustment mechanism 300 .

[0044] There are two mounting frames 100, each of which has a position avoidance hole 101, and the two position avoidance holes 101 are arranged opposite to each other. The film pulling mechanism 200 includes an active roller 210 and a floating roller 220, and the two ends of the active roller 210 are rotatably connected to the two mounting frames 100, and the two ends of the floating roller 220 are respectively penetrated through the two position avoidance holes 101. There are two tension adjustment mechanisms 300, and the two tension adjustment mechanisms 300, the two mounting frames 100 and the two ends of the floating roller 220 are arranged one by one.

[0045] The tension adjustment mechanism 300 includes a fixed member 310, a telescopic member 320, a connecting rod 330 and an elastic member 340. The fixed member 310 is fixedly connected to the mounting frame 100, the telescopic member 320 is movably connected to the fixed member 310, one end of the connecting rod 330 is rotatably connected to the mounting frame 100, the other end of the connecting rod 330 is connected to one end of the floating roller 220, and the elastic member 340 is respectively connected to the telescopic member 320 and the connecting rod 330. It should be emphasized that the structures of the two tension adjustment mechanisms 300 are the same.

[0046] In this embodiment, when the film-stretching device 10 starts working, the plastic film passes through between the active roller 210 and the floating roller 220. Under the tension of the elastic members 340 of the two tension adjusting members, the floating roller 220 and the active roller 210 clamp the plastic film, and the active roller 210 and the floating roller 220 rotate to achieve the effect of continuous film stretching.

[0047] In the above-mentioned film-drawing device 10, the plastic film is passed between the active roller 210 and the floating roller 220. The floating roller 220 and the active roller 210 clamp the plastic film, and the plastic film is conveyed by the rotation of the floating roller 220 and the active roller 210. The tension adjustment mechanism 300 is connected to the two ends of the floating roller 220, and is used to adjust the distance between the floating roller 220 and the active roller 210, so that the floating roller 220 and the active roller 210 remain parallel, so that the pressure on the plastic film is consistent at various locations, and thus the tension on the plastic film is consistent at various locations, thereby avoiding the problem of different lengths of the two sides of the plastic film and improving the quality of the plastic film.

[0048] In some preferred embodiments, the fixing member 310 is formed with a movable groove 311 and a connecting hole 312 that are connected to each other, and the telescopic member 320 includes a sliding portion 321 and an adjusting portion 322. The sliding portion 321 is slidably arranged in the movable groove 311, the sliding portion 321 is connected to the elastic member 340, and the adjusting portion 322 is fixedly connected to the sliding portion 321. The adjusting portion 322 is also located in the connecting hole 312 and is threadedly connected to the fixing member 310. When the film drawing mechanism 200 is working on film drawing, the adjusting portion 322 of the telescopic member 320 is rotated so that the sliding portion 321 moves in the movable groove 311, thereby increasing or decreasing the elastic force of the elastic member 340, and the adjusting portion 322 is rotated until the tensions at both ends of the floating roller 220 are the same and parallel to the active roller 210. It can be understood that the telescopic member 320 can adjust the distance between the active roller 210 and the floating roller 220 according to the thickness of the plastic film, so that the plastic film can smoothly pass between the active roller 210 and the floating roller 220. Preferably, the elastic member 340 may be a spring.

[0049] In some preferred embodiments, the tension adjustment mechanism 300 further includes a connecting member 350, the connecting member 350 is fixedly connected to the telescopic member 320, one end of the elastic member 340 is sleeved on the connecting member 350, so that the elastic member 340 is connected to the telescopic member 320 through the connecting member 350, and the other end of the elastic member 340 is fixedly connected to the connecting rod 330. The elastic member 340 is movably connected to the telescopic member 320, so that the tension adjustment mechanism 300 can adjust the tension more flexibly, and the tension adjustment mechanism 300 has a compact structure while reducing the processing cost.

[0050] In some more preferred embodiments, each tension adjustment mechanism 300 has a plurality of elastic members 340, so that when the film-pulling device 10 pulls out the plastic film, the floating roller 220 can stably press the active roller 210, and the plastic film is subjected to sufficient pressure, so that the plastic film can be smoothly pulled out. At the same time, the tension of the tension adjustment mechanism 300 is more stable. Therefore, when the film-pulling mechanism 200 pulls out the plastic film, the floating roller 220 presses the plastic film without shaking.

[0051] Embodiment 2:

[0052] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the film drawing device 10 of the utility model. Figures 4 to 6 .

[0053] The active roller 210 includes a movable roller body 211 and a first elastic sleeve 212. The two ends of the movable roller body 211 are rotatably connected to the two mounting frames 100 respectively. The first elastic sleeve 212 is sleeved on the movable roller body 211. In this embodiment, the first elastic sleeve 212 is elastic, and when the plastic film is clamped together with the floating roller 220, the friction force on the plastic film is increased, thereby avoiding the phenomenon of plastic film slippage during the film drawing process of the film drawing mechanism 200. Moreover, the first elastic sleeve 212 also plays a role in protecting the plastic film, so that the plastic film is not damaged during the process of being clamped and drawn by the active roller 210 and the floating roller 220.

[0054] In some preferred embodiments, the floating roller 220 includes a floating roller body 221 and a second elastic sleeve 222 . The two ends of the floating roller body 221 are respectively passed through two avoidance holes 101 and connected to the connecting rod 330 . The second elastic sleeve 222 is sleeved on the floating roller body 221 .

[0055] In this embodiment, the second elastic sleeve 222 is elastic, and increases the friction force on the plastic film when clamping the plastic film with the active roller 210, thereby avoiding the phenomenon of plastic film slipping during the film drawing process of the film drawing mechanism 200; moreover, the second elastic body 222 also plays a role in protecting the plastic film, so that the plastic film is not damaged during the process of being clamped by the active roller 210 and the floating roller 220. The floating roller body 221 is connected to the connecting rod 330 of the tension adjustment mechanism 300, that is, the film drawing mechanism 200 is connected to the tension adjustment mechanism 300, so that when the film drawing mechanism 200 is working, the tension adjustment mechanism 300 can adjust the distance between the active roller 210 and the floating roller 220, and then the plastic film can pass smoothly between the active roller 210 and the floating roller 220, thereby avoiding the problem that the active roller 210 and the floating roller 220 are too tight or too loose when clamping the plastic film, resulting in the problem that the plastic film cannot be smoothly pulled out.

[0056] Preferably, a groove 2211 is defined at one end of the floating roller body 221 .

[0057] In some preferred embodiments, the floating roller 220 further includes a limiter 223 and a cam 224 . The limiter 223 is fixedly connected to the mounting frame 100 , and the cam 224 is fixedly sleeved on the floating roller body 221 . The outer side of the cam 224 abuts against the limiter 223 .

[0058] In this embodiment, the cam 224 is clamped in the groove of the floating roller body 221. When the film pulling work is required, the floating roller body 221 is rotated, thereby driving the cam 224 to rotate, so that the thicker side of the cam 224 abuts against the limiter 223, further making the floating roller 220 away from the active roller 210, so that the plastic film can pass between the active roller 210 and the floating roller 220; when the plastic film passes between the active roller 210 and the floating roller 220, the floating roller body 221 is rotated, thereby driving the cam 224 to rotate, so that the cam 224 is reset, and at this time the floating roller 220 presses the plastic film and then presses the active roller 210, so that the active roller 210 and the floating roller 220 clamp the plastic film. The cam 224 rotates and abuts against the limiter 223, so that when the floating roller 220 is away from the active roller 210, the floating roller 220 is not easy to rotate autonomously, and it is not easy to drive the cam 224 to reset autonomously.

[0059] In some preferred embodiments, the floating roller 220 further includes a rotating rod 225, which is connected to the end of the floating roller body 221. The floating roller 220 can be moved away from or close to the active roller 210 by rotating the rotating rod 225, which is more labor-saving and convenient than rotating the floating roller body 221, thereby improving the operability of the film drawing mechanism 200.

[0060] In some more preferred embodiments, the sliding portion 321 is clearance-matched with the fixing member 310 , so that the sliding portion 321 can slide parallel inside the fixing member 310 , further enhancing the flexibility of the tension adjustment mechanism 300 .

[0061] Embodiment 3:

[0062] This embodiment provides a plastic film manufacturing device (not shown in the figure) based on the above embodiments.

[0063] A plastic film manufacturing device comprises a sealing device (not shown in the figure) and a film drawing device 10.

[0064] The sealing device is disposed adjacent to the film-drawing device 10 , and is used to seal the plastic film drawn by the film-drawing device 10 , so that the plastic film is formed into a shape of a plastic bag.

[0065] When the plastic film enters the film drawing station, the rotating rod 225 is rotated to rotate the cam 224, so that the floating roller 220 is away from the active roller 210, and the plastic film can smoothly pass between the active roller 210 and the floating roller 220. After the plastic film passes between the active roller 210 and the floating roller 220, the rotating rod 225 is rotated again to make the floating roller 220 approach the active roller 210, and then the cam 224 is reset, so that the active roller 210 and the floating roller 220 jointly clamp the plastic film; the driving member drives the active roller 210 to rotate, drives the plastic film to be transmitted, and then drives the floating roller 220 to rotate, and the active roller 210 and the floating roller 220 cooperate with each other to achieve the effect of continuous film drawing.

[0066] In the plastic film manufacturing equipment of the utility model, when the film-drawing device 10 performs the film-drawing operation, the plastic film is passed between the active roller 210 and the floating roller 220, the floating roller 220 and the active roller 210 clamp the plastic film, and the plastic film is conveyed by the rotation of the floating roller 220 and the active roller 210. The tension adjustment mechanism 300 is connected to both ends of the floating roller 220, and is used to adjust the distance between the floating roller 220 and the active roller 210, so that the floating roller 220 and the active roller 210 remain parallel, so that the pressure on the plastic film is consistent at various locations, and thus the tension on the plastic film is consistent at various locations, thereby avoiding the problem of different lengths of the two sides of the plastic film and improving the quality of the plastic film.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0069] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0070] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A film drawing device, characterized in that: include: A mounting frame (100), wherein each of the two mounting frames (100) is provided with a position avoiding hole (101), and the two position avoiding holes (101) are arranged opposite to each other; A film-drawing mechanism (200) comprises an active roller (210) and a floating roller (220), wherein two ends of the active roller (210) are respectively rotatably connected to the two mounting frames (100), and two ends of the floating roller (220) are respectively inserted into the two avoidance holes (101); and A tension adjustment mechanism (300), wherein two tension adjustment mechanisms (300), two mounting frames (100) and two ends of the floating roller (220) are arranged in a one-to-one correspondence; The tension adjustment mechanism (300) comprises a fixing member (310), a telescopic member (320), a connecting rod (330) and an elastic member (340); the fixing member (310) is fixedly connected to the mounting frame (100); the telescopic member (320) is movably connected to the fixing member (310); one end of the connecting rod (330) is rotatably connected to the mounting frame (100); the other end of the connecting rod (330) is connected to one end of the floating roller (220); and the elastic member (340) is respectively connected to the telescopic member (320) and the connecting rod (330).

2. The film drawing device according to claim 1, characterized in that: The fixing member (310) is formed with a movable groove (311) and a connecting hole (312) which are connected to each other. The telescopic member (320) includes a sliding portion (321) and an adjusting portion (322). The sliding portion (321) is slidably arranged in the movable groove (311). The sliding portion (321) is connected to the elastic member (340). The adjusting portion (322) is fixedly connected to the sliding portion (321). The adjusting portion (322) is also located in the connecting hole (312) and is threadedly connected to the fixing member (310).

3. The film drawing device according to claim 1, characterized in that: The tension adjustment mechanism (300) further comprises a connecting member (350), wherein the connecting member (350) is fixedly connected to the telescopic member (320), one end of the elastic member (340) is sleeved on the connecting member (350), so that the elastic member (340) is connected to the telescopic member (320) via the connecting member (350), and the other end of the elastic member (340) is fixedly connected to the connecting rod (330).

4. The film drawing device according to claim 1, characterized in that: Each of the tension adjustment mechanisms (300) includes a plurality of elastic members (340).

5. The film drawing device according to claim 1, characterized in that: The active roller (210) comprises: A movable roller body (211), wherein two ends of the movable roller body (211) are rotatably connected to the two mounting frames (100) respectively; and The first elastic sleeve (212) is sleeved on the movable roller body (211).

6. The film drawing device according to claim 1, characterized in that: The floating roller (220) comprises: A floating roller body (221), wherein two ends of the floating roller body (221) are respectively penetrated through the two avoidance holes (101) and are respectively connected to the connecting rods (330); and The second elastic sleeve (222) is sleeved on the floating roller body (221).

7. The film drawing device according to claim 6, characterized in that: The floating roller (220) further comprises a limiting member (223) and a cam (224); the limiting member (223) is fixedly connected to the mounting frame (100); the cam (224) is fixedly sleeved on the floating roller body (221); and the outer side surface of the cam (224) abuts against the limiting member (223).

8. The film drawing device according to claim 7, characterized in that: The floating roller (220) further comprises a rotating rod (225), wherein the rotating rod (225) is connected to the end of the floating roller body (221).

9. The film drawing device according to claim 2, characterized in that: The sliding portion (321) is clearance-matched with the fixing member (310).

10. A plastic film manufacturing device, characterized in that: The invention comprises the film-drawing device (10) according to any one of claims 1 to 9.

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