Roll changing mechanism of film blowing machine

Abstract

The utility model relates to the technical field of roll changing mechanisms, and discloses a roll changing mechanism of a film blowing machine, which realizes quick roll changing by arranging structures such as a station A, a station B, a gear box A and a motor A. After a film is wound at the station A, a stepping motor at the end part of a sliding frame is started, the stepping motor drives a screw rod A to rotate through a coupling, and the screw rod A is driven to rotate through the coupling; then the station A and the station B are driven to move synchronously, the station A moves to the end of the sliding way, the station B moves to the position where the station A is located, then the rotating rollers are driven to slide in the sliding groove A till the rotating rollers abut against the outer ring of a paper tube on the station B, at the moment, a motor B is started, an output shaft of the motor B drives the two rotating rollers to rotate together through a gear box B, and the rotating rollers are driven to rotate through the gear box B; and the effect of quickly changing the roll is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of roll changing mechanisms, and in particular to a roll changing mechanism for a blown film machine. Background Technology

[0002] A blown film machine heats and melts plastic particles and then blows them into a thin film. A winding mechanism is needed to collect the film, and a roll-changing mechanism is needed to change the rolls during the winding process. This allows for continuous film winding without stopping the machine. The main function of the blown film machine's roll-changing mechanism is to automatically change the roll during production, reducing manual intervention and improving production efficiency.

[0003] In the existing technology, the roll changing effect of the roll is not good. For example, during the roll changing process, the motor drives the stand to rotate so that the film is wound from the first station roll onto the second station roll. Because the output speed of the film is slow, it will cause the film to stretch and deform, and the roll changing time is long. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a blown film machine roll changing mechanism, which has the advantages of rapid roll changing and improved shearing efficiency, thus solving the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a blown film machine roll changing mechanism, including a slide, two slides are symmetrically arranged, a slide rail is opened on one side of the slide, a stepper motor is fixedly installed at the end of the slide, a lead screw A is rotatably installed between the inner walls of the slide rail, the output shaft of the stepper motor is connected to the lead screw A through a coupling, a dual-station winding mechanism is slidably installed between the slide rails, the dual-station winding mechanism includes station A and station B, a fixed frame is fixedly installed on the top of the slide, a rotating roller is symmetrically rotatably installed between the top of the fixed frame, a groove A is opened on the surface of the fixed frame below the rotating roller, and a base plate is provided between the bottoms of the slide, the base plate includes a slide box and a knife holder.

[0006] With the above structural setup, the dual-station winding mechanism, in conjunction with the stepper motor and lead screw A, enables rapid movement of station A and station B. The cooperation between station A and station B and the fixed frame allows for rapid roll changing.

[0007] Preferably, station A and station B are slidably installed between slide rails. Station A includes two movable screw blocks A, and station B includes two movable screw blocks B. Air shafts are rotatably installed between movable screw blocks A and between movable screw blocks B. Movable screw blocks A and B are threaded onto the outer ring of lead screw A. A gearbox A is fixedly installed on one side of one of the movable screw blocks A and B.

[0008] With the above structural setup, when the stepper motor drives the lead screw A to rotate through the coupling, it can synchronously move the positions of station A and station B, thereby achieving rapid roll changing through synchronous movement.

[0009] Preferably, the output shaft of the gearbox A is fixedly connected to the end of the air expansion shaft, and a motor A is fixedly installed on one side of the gearbox A. The motor A is connected to the air expansion shaft through the gearbox A.

[0010] Through the above structural configuration, gearbox A transmits power from motor A in a variable manner, so that the rotation speed of the pneumatic shaft matches the production speed of the blown film machine.

[0011] Preferably, a pressure roller is slidably installed inside the chute A, and an end of the pressure roller is connected to a gearbox B at both ends. The output shaft of the gearbox B is connected to the ends of the two pressure rollers for transmission.

[0012] With the above-mentioned structural setup, the cylinder A is used to influence the up-and-down sliding position of the pressure roller. During roll changing operations, the cylinder A is activated to move the position of the pressure roller so that it presses against the outer ring of the paper tube.

[0013] Preferably, a cylinder A is fixedly installed on one side of the fixing frame, the output shaft of one cylinder A is fixedly connected to a gearbox B, the output shaft of the other cylinder A is fixedly connected to an end, a motor B is fixedly installed on one side of the gearbox B, and the output shaft of the motor B is connected to the rotating roller through the gearbox B.

[0014] With the above-mentioned structure, the starting motor B drives the pressure roller to rotate through the gearbox B, so that the pressure roller rotates evenly on the outer surface of the paper tube, and the film is evenly attached to the outer ring of the paper tube.

[0015] Preferably, a sliding box is fixedly installed on the top of the base plate, a tool holder is slidably installed inside the sliding box, and tool heads are fixedly installed on the top of both sides of the tool holder.

[0016] With the above structural design, the slide box restricts the position of the tool holder, so that the tool holder can only slide laterally inside the slide box.

[0017] Preferably, a cylinder B is provided on one side of the base plate located on the slide, the output shaft of the cylinder B is fixedly connected to the surface of the base plate, a gearbox C is fixedly installed below the slide box, and a motor C is fixedly installed on one side of the gearbox C.

[0018] With the above structural design, cylinder B controls the overall position of the base plate by contracting and extending the output shaft, enabling it to react quickly when it is necessary to cut the film or move away from the film.

[0019] Preferably, the slide box has a slide groove B inside, and a lead screw B is rotatably installed inside the slide groove B. The tool holder is slidably installed inside the slide groove B and threaded onto the outer ring of the lead screw B. The output shaft of the gearbox C is connected to the end of the lead screw B through a transmission connection. The output shaft of the motor C is connected to the lead screw B through the gearbox C through a transmission connection.

[0020] With the above structural design, when the lead screw B drives the knife holder to slide, it can respond quickly and cut the film quickly through the knife head.

[0021] This utility model has the following advantages:

[0022] 1. The film blowing machine's roll changing mechanism achieves rapid roll changing by setting up stations A and B, gearbox A, and motor A. After the film is wound at station A, the stepper motor at the end of the carriage is started. The stepper motor drives the lead screw A to rotate through the coupling, thereby driving station A and station B to move synchronously. Station A moves to the end of the slide, while station B moves to the original position of station A. Then, the pressure roller is driven to slide inside the slide groove A until the pressure roller hits the outer ring of the paper tube at station B. At this time, motor B is started. The output shaft of motor B drives the two pressure rollers to rotate together through gearbox B. Then, the base plate is raised, raising the cutter head to the side of the film. Then, motor C is started. The output shaft of motor C drives the lead screw B to rotate through gearbox C, causing the cutter holder to quickly slide the cutter head to cut the film. Then, through the rotation of the pressure roller and the paper tube, the film is attached and wound to the outer ring of the paper tube at station B, achieving the effect of rapid roll changing.

[0023] 2. The film blowing machine's roll changing mechanism achieves rapid cutting by setting up a sliding box, knife holder, and cutter head. When cylinder B is activated, its output shaft retracts, causing the base plate to move upwards, positioning the cutter head on one side of the film. Then, motor C is activated, and its output shaft drives the lead screw B to rotate via gearbox C. Due to the restriction of the sliding groove B, the knife holder can only slide within the groove, thus driving the cutter head to quickly slide from one side of the film to the other, cutting the film. The rotation of the pressure roller and the pneumatic shaft at station B evenly adheres the film to the outer ring of the paper tube at station B. When the pneumatic shaft at station B rotates, it causes the film to wind around the outer ring of the paper tube, achieving a rapid cutting effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram showing the connection between the carriage and the fixed frame structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of the carriage of this utility model;

[0027] Figure 4 This is a schematic diagram of the internal structure of the slide box of this utility model.

[0028] In the diagram: 1. Carriage; 11. Slide rail; 12. Stepper motor; 13. Lead screw A; 21. Station A; 22. Station B; 23. Moving screw block A; 24. Moving screw block B; 25. Gearbox A; 26. Motor A; 3. Fixed frame; 31. Rotary roller; 32. Slide groove A; 33. Rotary pressure roller; 34. Gearbox B; 35. Cylinder A; 36. Motor B; 4. Base plate; 41. Slide box; 42. Tool holder; 43. Tool head; 44. Cylinder B; 45. Gearbox C; 46. Motor C; 47. Slide groove B; 48. Lead screw B. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-3 A blown film machine roll changing mechanism includes a slide 1, two slides symmetrically arranged, a slide rail 11 on one side of the slide 1, a stepper motor 12 fixedly installed at the end of the slide 1, a lead screw A13 rotatably installed between the inner walls of the slide rail 11, the output shaft of the stepper motor 12 being connected to the lead screw A13 via a coupling, a dual-station winding mechanism slidably installed between the slide rails 11, the dual-station winding mechanism including station A21 and station B22, a fixed frame 3 fixedly installed on the top of the slide 1, a rotating roller 31 symmetrically rotatably installed between the tops of the fixed frames 3, a groove A32 opened on the surface of the fixed frame 3 below the rotating roller 31, and a base plate 4 between the bottoms of the slide 1, the base plate 4 including a slide box 41 and a knife holder 42.

[0031] In practical applications, this device achieves rapid movement of station A21 and station B22 by cooperating with the dual-station winding mechanism, stepper motor 12, and lead screw A13. The cooperation between station A21, station B22, and the fixed frame 3 enables rapid roll changing. After the outer paper tube of station A21 is wound with film, stepper motor 12 drives lead screw A13 to rotate through coupling, thereby causing station A21 and station B22 to move synchronously. Station B22 moves to the original position of station A21, and station A21 moves to the end of slide 1, achieving rapid roll changing. At this time, the outer ring of pressure roller 33 is tangent to the outer paper tube of station B22, pressing the film against the outer ring of the paper tube of station B22. Through the cutting head 43, the film is wound around the outer ring of the paper tube of station B22, improving the roll changing time and avoiding film stretching and deformation caused by circular roll changing.

[0032] Please see Figures 1-3 Workstation A21 and workstation B22 are slidably installed between slide rail 11. Workstation A21 includes two movable screw blocks A23, and workstation B22 includes two movable screw blocks B24. Air expansion shafts are rotatably installed between movable screw blocks A23 and between movable screw blocks B24. Movable screw blocks A23 and B24 are threadedly sleeved on the outer ring of lead screw A13. A gearbox A25 is fixedly installed on one side of one of the movable screw blocks A23 and B24.

[0033] By connecting the movable screw blocks A23 and B24 to the outer ring of the lead screw A13, the stepper motor 12 can drive the lead screw A13 to rotate through the coupling, and can synchronously move the positions of station A21 and station B22, thereby achieving rapid roll changing through synchronous movement.

[0034] Please see Figures 1-3 The output shaft of gearbox A25 is fixedly connected to the end of the air expansion shaft. Motor A26 is fixedly installed on one side of gearbox A25. Motor A26 is connected to the air expansion shaft through gearbox A25.

[0035] When the film is being wound, the driving force and speed of the motor A26 are not matched with the production speed of the blown film machine. By setting up a gearbox A25 to change the transmission of the power output of the motor A26, the rotation speed of the pneumatic shaft is matched with the production speed of the blown film machine.

[0036] Please see Figures 1-3Inside the slide groove A32, a rotating pressure roller 33 is slidably installed. The two ends of the rotating pressure roller 33 are respectively connected to the end head and the gearbox B34. The output shaft of the gearbox B34 is connected to the ends of the two rotating pressure rollers 33. A cylinder A35 is fixedly installed on one side of the fixed frame 3. The output shaft of one cylinder A35 is fixedly connected to the gearbox B34, and the output shaft of the other cylinder A35 is fixedly connected to the end head. A motor B36 is fixedly installed on one side of the gearbox B34. The output shaft of the motor B36 is connected to the rotating pressure roller 33 through the gearbox B34. When the motor B36 drives the output shaft to rotate, it drives the two rotating pressure rollers 33 to rotate in different directions through the gearbox B34.

[0037] By setting cylinder A35 and motor B36 to influence the up-and-down sliding position and rotation of the pressure roller 33 respectively, during the roll changing operation, cylinder A35 is started to move the position of the pressure roller 33 so that the pressure roller 33 abuts against the outer ring of the paper tube. Then, motor B36 is started to drive the pressure roller 33 to rotate through gearbox B34, so that the pressure roller 33 rotates evenly on the outer surface of the paper tube, and the film is evenly attached to the outer ring of the paper tube, realizing the rapid operation of the film changing station.

[0038] Please see Figures 1-4 A sliding box 41 is fixedly installed on the top of the base plate 4. A tool holder 42 is slidably installed inside the sliding box 41. Tool heads 43 are fixedly installed on the top of both sides of the tool holder 42.

[0039] By restricting the position of the tool holder 42 by the slide box 41, the tool holder 42 can only slide laterally inside the slide box 41. At the same time, due to the position restriction, the tool holder 42 can slide quickly inside the slide box 41.

[0040] Please see Figures 1-4 A cylinder B44 is provided on one side of the base plate 4 located on the slide 1. The output shaft of the cylinder B44 is fixedly connected to the surface of the base plate 4. A gearbox C45 is fixedly installed below the slide box 41, and a motor C46 is fixedly installed on one side of the gearbox C45.

[0041] Cylinder B44 controls the overall position of the base plate 4 by contracting and extending the output shaft, enabling it to react quickly when the film needs to be cut or moved away from the film. With the above settings, it can respond quickly when changing stations for winding, speeding up the station changeover and improving overall efficiency.

[0042] Please see Figures 1-4 The slide box 41 has a slide groove B47 inside, and a lead screw B48 is rotatably installed inside the slide groove B47. The tool holder 42 is slidably installed inside the slide groove B47 and threaded onto the outer ring of the lead screw B48. The output shaft of the gearbox C45 is connected to the end of the lead screw B48. The output shaft of the motor C46 is connected to the lead screw B48 through the gearbox C45.

[0043] The gearbox C45 transmits the power from the output shaft of the motor C46 to the lead screw B48. Due to the transmission ratio of the gearbox C45, the lead screw B48 can respond quickly when it drives the tool holder 42 to slide, and quickly cut the film through the cutter head 43, avoiding excessively large cutting angles of the film.

[0044] Working principle: In use, first install the corresponding paper tubes on the outer rings of the pneumatic shafts of stations A21 and B22. Then guide the film through the roller 31 and pressure roller 33. For the initial winding, the film needs to be guided to be wound on the outer ring of the paper tube at station A21. Then, start the motor A26 on one side of station A21. The output shaft of motor A26 drives the pneumatic shaft to rotate through gearbox A25. Adjust the speed of the pneumatic shaft to match the production speed of the blown film machine. Then, the paper tube on the outer ring of the pneumatic shaft winds the film evenly. After the paper tube at station A21 is wound, start the stepper motor 12 at the end of the carriage 1. The output shaft of stepper motor 12 drives lead screw A13 to rotate via a coupling. Because the positions of moving screw blocks A23 and B24 are restricted by slide rail 11, they can only slide between the outer ring of lead screw A13 and the inside of slide rail 11. This drives station A21 and station B22 to move synchronously, causing station A21 to move to the end of slide rail 11, while station B22 moves to the original position of station A21. Before the paper tube at station B22 winds the film, motor A26 on one side of station B22 is started, and the driving force from the output shaft of motor A26 is transmitted to station B22 via gearbox A25. On the pneumatic shaft, the paper tube is pre-rotated to facilitate smoother winding when changing the paper tube for film. At this time, the drive cylinder A35 pushes the position of the pressure roller 33 downward through its output shaft, causing the pressure roller 33 to slide inside the slide groove A32 until it hits the outer ring of the paper tube at station B22. Then, the motor B36 is started, and its output shaft drives both pressure rollers 33 to rotate together through the gearbox B34. Subsequently, the cylinder B44 is started, and its output shaft retracts, causing the base plate 4 to move upward, positioning the cutter head 43 on one side of the film. Then, motor C46 is started. The output shaft of motor C46 drives lead screw B48 to rotate through gearbox C45. Due to the restriction of slide groove B47, cutter holder 42 can only slide inside slide groove B47, thereby driving cutter head 43 to slide quickly from one side of the film to the other side to cut the film. Due to the rotation of pressure roller 33 and pneumatic shaft of station B22, the film is evenly attached to the outer ring of paper tube of station B22. When the pneumatic shaft of station B22 rotates, it drives the film to be wound on the outer ring of paper tube, realizing the effect of quick station change. Paper tube winding can be changed smoothly without stopping the machine.

Claims

1. A blown film machine roll changing mechanism, comprising a slide (1), characterized in that: Two slides (1) are symmetrically arranged. A slide rail (11) is provided on one side of the slide (1). A stepper motor (12) is fixedly installed at the end of the slide (1). A lead screw A (13) is rotatably installed between the inner walls of the slide rail (11). The output shaft of the stepper motor (12) is connected to the lead screw A (13) through a coupling. A dual-station winding mechanism is slidably installed between the slide rails (11). The dual-station winding mechanism includes station A (21) and station B (22). A fixed frame (3) is fixedly installed on the top of the slide (1). A rotating roller (31) is symmetrically rotatably installed between the tops of the fixed frame (3). A groove A (32) is provided on the surface of the fixed frame (3) below the rotating roller (31). A base plate (4) is provided between the bottoms of the slides (1). The base plate (4) includes a slide box (41) and a tool holder (42).

2. The blown film machine roll changing mechanism according to claim 1, characterized in that: The workstation A (21) and workstation B (22) are slidably installed between the slide rail (11). The workstation A (21) includes two movable screw blocks A (23), and the workstation B (22) includes two movable screw blocks B (24). Air shafts are rotatably installed between the movable screw blocks A (23) and between the movable screw blocks B (24). The movable screw blocks A (23) and B (24) are threaded onto the outer ring of the lead screw A (13). A gearbox A (25) is fixedly installed on one side of one of the movable screw blocks A (23) and B (24).

3. The blown film machine roll changing mechanism according to claim 2, characterized in that: The output shaft of the gearbox A (25) is fixedly connected to the end of the air expansion shaft. A motor A (26) is fixedly installed on one side of the gearbox A (25). The motor A (26) is connected to the air expansion shaft through the gearbox A (25).

4. The blown film machine roll changing mechanism according to claim 3, characterized in that: The sliding groove A (32) has a rotating pressure roller (33) slidably installed inside. The two ends of the rotating pressure roller (33) are respectively connected to the gearbox B (34). The output shaft of the gearbox B (34) is connected to the ends of the two rotating pressure rollers (33) for transmission.

5. The blown film machine roll changing mechanism according to claim 4, characterized in that: A cylinder A (35) is fixedly installed on one side of the fixed frame (3). The output shaft of one of the cylinders A (35) is fixedly connected to the gearbox B (34), and the output shaft of the other cylinder A (35) is fixedly connected to the end. A motor B (36) is fixedly installed on one side of the gearbox B (34). The output shaft of the motor B (36) is connected to the rotating roller (33) through the gearbox B (34).

6. The blown film machine roll changing mechanism according to claim 5, characterized in that: A sliding box (41) is fixedly installed on the top of the base plate (4), and a tool holder (42) is slidably installed inside the sliding box (41). Tool heads (43) are fixedly installed on the top of both sides of the tool holder (42).

7. The blown film machine roll changing mechanism according to claim 6, characterized in that: The base plate (4) is provided with a cylinder B (44) on one side of the slide (1). The output shaft of the cylinder B (44) is fixedly connected to the surface of the base plate (4). A gearbox C (45) is fixedly installed below the slide box (41). A motor C (46) is fixedly installed on one side of the gearbox C (45).

8. The blown film machine roll changing mechanism according to claim 7, characterized in that: The slide box (41) has a slide groove B (47) inside, and a lead screw B (48) is rotatably installed inside the slide groove B (47). The tool holder (42) is slidably installed inside the slide groove B (47) and threaded onto the outer ring of the lead screw B (48). The output shaft of the gearbox C (45) is connected to the end of the lead screw B (48) through a transmission connection. The output shaft of the motor C (46) is connected to the lead screw B (48) through the gearbox C (45) through a transmission connection.

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