Traction auxiliary device of three-layer co-extrusion film blowing machine

Abstract

The utility model discloses a traction auxiliary device of a three-layer co-extrusion film blowing machine, which belongs to the technical field of three-layer co-extrusion film blowing machines and comprises a traction frame, two ends of the traction frame are respectively provided with a limiting mechanism, two sides of the traction frame are respectively provided with a moving groove, the bottoms of inner cavities of the two moving grooves are respectively provided with a sliding groove, and the sliding grooves are respectively provided with a sliding block. The bottom face of the traction frame is fixedly connected with two sets of supporting seats, and one-way lead screws are rotationally connected between the two sets of supporting seats correspondingly. According to the utility model, when the position of the traction roller is adjusted, the rotating column is utilized to drive the rotating rod and the worms to rotate, the two one-way screw rods are driven to rotate through the transmission between the two worms and the two worm wheels, and the two moving seats are driven to move synchronously through the transmission between the two one-way screw rods and the two sliding seats; and meanwhile, the reverse self-locking performance of the worm gear and the worm ensures the stability of the traction roller after adjustment.

Description

Technical Field

[0001] This utility model relates to the technical field of three-layer co-extrusion blown film machines, and more specifically, to a traction auxiliary device for a three-layer co-extrusion blown film machine. Background Technology

[0002] A three-layer co-extrusion blown film machine is an industrial equipment used to produce three-layer composite films. It simultaneously extrudes three different types of plastic particles (such as LLDPE, LDPE, and HDPE), heats and melts them, and then blow-forms them to obtain a composite film with high transparency, puncture resistance, and anti-curling properties. After the composite film is manufactured, a traction device is needed to pull the film so that it can be wound up.

[0003] A search revealed that utility model patent CN218227760U discloses a traction auxiliary device for a three-layer co-extrusion blown film machine, including a traction frame and a traction rod. The upper end of the traction frame has a sliding groove, and a sliding component is slidably connected to the upper end of the groove. This utility model has a reasonable structure. By squeezing and locking with a fixing ring, the sliding component is fixed and limited, allowing the traction rod to maintain a stable state at any position, improving the film traction effect and finished product quality. During the rotation of the traction rod, all rotational friction is concentrated inside the bearing, greatly reducing rotational wear between parts, reducing wear and corrosion, and extending the service life of the device. By removing the limiting rod, the sliding component can be disassembled in detail, facilitating the disassembly and replacement of the bearing and traction rod, and also facilitating parts maintenance.

[0004] However, the above patent still has the following shortcomings: the convenience of adjusting the position of the traction roller is not good, and it is not convenient to limit the traction film. The traction film is prone to deflection. Therefore, we propose a traction auxiliary device for a three-layer co-extrusion blown film machine. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a traction auxiliary device for a three-layer co-extrusion blown film machine.

[0006] To solve the above problems, the present invention adopts the following technical solution: a traction auxiliary device for a three-layer co-extrusion blown film machine, comprising a traction frame, with limiting mechanisms at both ends of the traction frame, movable grooves on both sides of the traction frame, and sliding grooves at the bottom of the inner cavities of the two movable grooves, two sets of support seats fixedly connected to the bottom surface of the traction frame, one-way screws rotatably connected between the two sets of support seats, sliding blocks threaded onto the outer sides of the two one-way screws, the top ends of the two sliding blocks extending through the sliding grooves into the inner cavities of the movable grooves and fixedly connected to movable seats, a traction roller rotatably connected between the two movable seats via bearings, the ends of the two one-way screws extending to the outside of the support seats and fixedly connected to worm gears, two rotating bases fixedly connected to the bottom surface of the traction frame, rotating rods rotatably connected to the two rotating bases, worm gears fixedly connected to both ends of the rotating rods, the two worm gears meshing with two worm gears respectively, and a rotating column fixedly sleeved in the middle of the rotating rod.

[0007] As a preferred embodiment of this utility model, the limiting mechanism includes an adjustment groove on the top surface of the traction frame and multiple insertion holes on the side surface of the traction frame. A bidirectional lead screw is rotatably connected to the inner cavity of the adjustment groove. Adjustment blocks are threaded onto the outer sides of both ends of the bidirectional lead screw. Limiting rollers are rotatably connected to the top surfaces of the two adjustment blocks. The end of the bidirectional lead screw extends to the outside of the traction frame and is fixedly connected to a knob. A wing screw is threaded onto the knob, and the end of the wing screw is movably sleeved into the inner cavity of the insertion hole.

[0008] As a preferred embodiment of this utility model, a scale is provided on the top surface of the traction frame and on the side of the adjustment groove.

[0009] In a preferred embodiment of this utility model, the side of the top of the slide block is in contact with the inner wall of the slide groove.

[0010] As a preferred embodiment of this utility model, the plurality of sockets are arranged evenly in a circle with the axis of the bidirectional lead screw as the center, and the inner diameter of the sockets is equal to the outer diameter of the end of the wing screw.

[0011] In a preferred embodiment of this utility model, the side surface of the adjusting block is in contact with the inner wall of the adjusting groove, and the bottom surface of the adjusting block is in contact with the bottom surface of the inner cavity of the adjusting groove.

[0012] Compared with the prior art, the advantages of this utility model are: (1) In this utility model, when the position of the traction roller is adjusted, the rotating column drives the rotating rod and the worm to rotate, and the two unidirectional screws are driven to rotate through the transmission between the two worms and the two worm wheels. The two moving seats are driven to move synchronously through the transmission between the two unidirectional screws and the two sliding seats, thereby making it convenient to adjust the position of the traction roller. At the same time, the reverse self-locking property of the worm wheel and the worm ensures the stability of the traction roller after adjustment.

[0013] (2) In this utility model, the double screw is rotated by rotating the knob, and the two adjusting blocks and the two limiting rollers are rotated in opposite directions by the threaded cooperation between the double screw and the two adjusting blocks, thereby adjusting the distance between the two limiting rollers, and then using the two limiting rollers to limit the film of different widths, thus avoiding the film from being skewed. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 is a bottom view of the overall design of this utility model.

[0016] Figure 3 is a schematic diagram of the structure of the traction frame of this utility model.

[0017] Figure 4 is a schematic diagram of the structure of the adjusting block of this utility model.

[0018] Figure 5 is an enlarged schematic diagram of point A in Figure 2 of this utility model.

[0019] The following are the labels in the diagram: 1. Traction frame; 2. Moving groove; 3. Slide groove; 4. Limiting mechanism; 5. Support seat; 6. One-way lead screw; 7. Worm gear; 8. Rotating base; 9. Rotating rod; 10. Worm; 11. Rotating column; 12. Slide seat; 13. Moving seat; 14. Traction roller; 15. Scale; 16. Adjusting groove; 17. Insertion hole; 18. Two-way lead screw; 19. Adjusting block; 20. Knob; 21. Wing screw; 22. Limiting roller. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0023] Please refer to Figures 1-5. A traction auxiliary device for a three-layer co-extrusion blown film machine includes a traction frame 1. Limiting mechanisms 4 are respectively provided at both ends of the traction frame 1. Moving grooves 2 are provided on both sides of the traction frame 1. Slide grooves 3 are provided at the bottom of the inner cavity of each of the two moving grooves 2. Two sets of support seats 5 are fixedly connected to the bottom surface of the traction frame 1. One-way screws 6 are rotatably connected between the two sets of support seats 5. Slide seats 12 are threaded onto the outer side of each of the two one-way screws 6. The top ends of each of the two slide seats 12 extend through the slide grooves 3 into the inner cavity of the moving grooves 2 and are fixedly connected to moving seats 13. A traction roller 14 is rotatably connected between the two moving seats 13 via bearings. The ends of each of the two one-way screws 6 extend to the outside of the support seats 5 and are fixedly connected to worm gears 7. Two rotating bases 8 are fixedly connected to the bottom surface of the traction frame 1. Rotating rods 9 are rotatably connected to the two rotating bases 8. Worms 10 are fixedly connected to both ends of the rotating rods 9. The two worm gears 10 are respectively connected to the two worm gears 7. The rotating rod 9 is fixedly sleeved with a rotating column 11 in the middle of the rod.

[0024] In this embodiment, there is a reverse self-locking property between the worm gear 7 and the worm 10, which is existing technology and will not be described in detail.

[0025] Specifically, please refer to Figures 1 to 4. The limiting mechanism 4 includes an adjustment groove 16 on the top surface of the traction frame 1 and multiple insertion holes 17 on the side surface of the traction frame 1. The inner cavity of the adjustment groove 16 is rotatably connected to a bidirectional lead screw 18. Adjustment blocks 19 are threaded onto the outer sides of both ends of the bidirectional lead screw 18. Limiting rollers 22 are rotatably connected to the top surfaces of the two adjustment blocks 19. The end of the bidirectional lead screw 18 extends to the outside of the traction frame 1 and is fixedly connected to a knob 20. A wing screw 21 is threaded onto the knob 20. The end of the wing screw 21 is movably sleeved into the inner cavity of the insertion hole 17.

[0026] Specifically, please refer to Figure 3. A scale 15 is provided on the top surface of the traction frame 1 and on the side of the adjustment groove 16.

[0027] In this embodiment, the zero point of the scale 15 is located in the middle of the top surface of the traction frame 1. The distance between the two limiting rollers 22 is controlled by the scale 15. In addition, the length of the adjusting block 19 is equal to the outer diameter of the limiting roller 22.

[0028] Specifically, please refer to Figure 3, where the side of the top of the slide 12 fits against the inner wall of the slide groove 3.

[0029] In this embodiment, the inner wall of the groove 3 is used to limit the slide block 12, so that the slide block 12 can only move along the axial direction of the one-way lead screw 6.

[0030] Specifically, please refer to Figures 1 and 3. Multiple sockets 17 are evenly arranged in a circle with the axis of the bidirectional lead screw 18 as the center. The inner diameter of the sockets 17 is equal to the outer diameter of the end of the wing screw 21.

[0031] In this embodiment, the wing screw 21 is ensured to be easily inserted into the multiple sockets 17.

[0032] Specifically, please refer to Figures 1, 3 and 4. The side of the adjusting block 19 is in contact with the inner wall of the adjusting groove 16, and the bottom surface of the adjusting block 19 is in contact with the bottom surface of the inner cavity of the adjusting groove 16.

[0033] In this embodiment, the inner wall of the adjusting groove 16 is used to limit the adjusting block 19, so that the adjusting block 19 can only move along the axial direction of the bidirectional lead screw 18.

[0034] Working principle: In use, firstly, rotating the rotating column 11 drives the rotating rod 9 and the worm gear 10 to rotate. Through the transmission between the two worm gears 10 and the two worm wheels 7, the two one-way lead screws 6 are driven to rotate. Through the transmission between the two one-way lead screws 6 and the two slide blocks 12, the two moving seats 13 are driven to move synchronously, thereby conveniently adjusting the position of the traction roller 14. Then, rotating the knob 20 drives the bidirectional lead screw 18 to rotate. Through the threaded engagement between the bidirectional lead screw 18 and the two adjusting blocks 19, the two adjusting blocks 19 and the two limiting rollers 22 are driven to rotate in opposite directions, thereby adjusting the distance between the two limiting rollers 22, thereby limiting the film of different widths. Finally, rotating the wing screw 21 so that its end is inserted into a socket 17, thereby fixing the bidirectional lead screw 18, the adjusting blocks 19 and the limiting rollers 22.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A traction aid for a three-layer co-extrusion blown film machine comprising a traction frame (1), characterized in that: The traction frame (1) is provided with limit mechanisms (4) at both ends. The traction frame (1) is provided with moving grooves (2) on both sides. The bottom of the inner cavity of the two moving grooves (2) is provided with sliding grooves (3). The bottom surface of the traction frame (1) is fixedly connected with two sets of support seats (5). The two sets of support seats (5) are rotatably connected with one-way screws (6). The outer sides of the two one-way screws (6) are threaded with sliding seats (12). The tops of the two sliding seats (12) extend through the sliding grooves (3) to the inner cavity of the moving grooves (2) and are fixedly connected with moving seats (4). 13), a traction roller (14) is rotatably connected between the two movable seats (13) via bearings. The ends of the two unidirectional screws (6) extend to the outside of the support seat (5) and are fixedly connected to worm gears (7). Two rotating bases (8) are fixedly connected to the bottom surface of the traction frame (1). Rotating rods (9) are rotatably connected to the two rotating bases (8). Worms (10) are fixedly connected to both ends of the rotating rods (9). The two worms (10) mesh with the two worm gears (7) respectively. A rotating column (11) is fixedly sleeved in the middle of the rotating rods (9).

2. A take-off aid for a three-layer co-extrusion film blowing machine according to claim 1, characterized in that: The limiting mechanism (4) includes an adjustment groove (16) on the top surface of the traction frame (1) and multiple insertion holes (17) on the side of the traction frame (1). The inner cavity of the adjustment groove (16) is rotatably connected to a bidirectional lead screw (18). Adjustment blocks (19) are threaded onto the outer sides of both ends of the bidirectional lead screw (18). Limiting rollers (22) are rotatably connected to the top surfaces of the two adjustment blocks (19). The end of the bidirectional lead screw (18) extends to the outside of the traction frame (1) and is fixedly connected to a knob (20). A wing screw (21) is threaded onto the knob (20). The end of the wing screw (21) is movably sleeved into the inner cavity of the insertion hole (17).

3. A traction aid for a three-layer co-extrusion film blowing machine according to claim 2, characterized in that: A scale (15) is provided on the top surface of the traction frame (1) and on the side of the adjustment groove (16).

4. A take-off aid for a three-layer co-extrusion film blowing machine according to claim 1, characterized in that: The side of the top of the slide block (12) is in contact with the inner wall of the slide groove (3).

5. A take-off aid for a three-layer co-extrusion film blowing machine according to claim 2, characterized in that: The plurality of the sockets (17) are evenly arranged in a circle with the axis of the bidirectional lead screw (18) as the center, and the inner diameter of the sockets (17) is equal to the outer diameter of the end of the wing screw (21).

6. A take-off aid for a three-layer co-extrusion film blowing machine according to claim 2, characterized in that: The side of the adjusting block (19) is in contact with the inner wall of the adjusting groove (16), and the bottom surface of the adjusting block (19) is in contact with the bottom surface of the inner cavity of the adjusting groove (16).

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