A mechanism structure of a film automatic rewinding device

Abstract

The utility model discloses a kind of material breaking mechanism structures of cast film automatic rewinding device, including two air cylinders, material breaking shaft, guide roller and four pressure wheel seats, the output end of two air cylinders is all installed with shaft coupling, shaft coupling is all installed with connecting shaft, one end of far away from air cylinder output end, connecting shaft is fixedly installed with rack, one end of far away from shaft coupling of connecting shaft, the outside of material breaking shaft is fixedly installed with material breaking knife, and the both ends of material breaking shaft are fixedly installed with material breaking arm;By realizing the reciprocating up-down movement of the output end of air cylinder, reciprocating swing of material breaking knife can be realized, so as to carry out interval material breaking to cast film, and the expansion speed of air cylinder output end can be adjusted, the swing frequency of material breaking knife is adjusted, so as to adjust the material breaking interval of cast film, by adjusting the expansion speed of air cylinder, material breaking interval can be flexibly changed, both small size film section high-frequency cutting demand and large size film section low-frequency cutting demand can be met, and the production of different specifications products is compatible.

Description

Technical Field

[0001] This utility model relates to the field of cast film production technology, specifically to a material cutting mechanism structure for an automatic rewinding device for cast film. Background Technology

[0002] In the field of cast film production, automatic rewinding equipment is the core equipment for achieving continuous film winding and improving production efficiency. The material cutting mechanism, as a key component of the automatic rewinding equipment, directly determines the continuity of the cast film winding process and the quality of the finished film. Currently, the material cutting mechanism of automatic rewinding equipment for cast film mainly adopts manual cutting or simple mechanical transmission structures, which have many technical drawbacks in practical applications and are difficult to meet the needs of large-scale, high-precision production.

[0003] Existing cutting mechanisms have low cutting accuracy, easily leading to film material waste. Most traditional mechanisms directly drive the cutter with a cylinder or use a single-stage gear transmission to achieve cutter oscillation. Lacking precise guiding and positioning structures, radial offset easily occurs when the cylinder output pushes the cutter, and excessive gear meshing clearance also causes unstable cutter oscillation trajectory, resulting in a cutting position deviation of ±0.5mm or more each time. For thin cast films with a thickness of 0.02mm-0.5mm, this deviation leads to uneven edges after cutting, requiring additional edge trimming during subsequent rewinding. This not only increases process costs but also causes 5%-8% film material waste, especially in the production of small-sized film segments (5cm-20cm), where the waste problem is even more pronounced. Utility Model Content

[0004] The purpose of this invention is to provide a material cutting mechanism structure for an automatic rewinding device for cast film, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a material cutting mechanism structure for an automatic rewinding device for cast film, comprising two cylinders, a material cutting shaft, guide rollers, and four pressure roller seats. Couplings are installed at the output ends of both cylinders. A connecting shaft is installed at the end of each coupling away from the cylinder output end. A rack is fixedly installed at the end of each connecting shaft away from the coupling. A material cutting knife is fixedly installed on the outer side of the material cutting shaft. Material cutting arms are fixedly installed at both ends of the material cutting shaft. Four fixed insert rods are sleeved inside the end of each material cutting arm away from the material cutting shaft. Each of the fixed insertion rods has a cutter arm fixing seat fixedly installed at one end. Each cutter arm fixing seat has a cutter arm shaft fixedly installed on the side away from the fixed insertion rod. Each cutter arm shaft has a material cutting gear fixedly installed on the outside. Each of the two ends of the guide roller has a bearing three fixedly installed inside. Each bearing three has a mediator fixedly installed inside. Each mediator has an inner rotating rod sleeved inside. Each end of the inner rotating rod has a positioning gear fixedly installed at both ends. Each of the four pressure roller seats has an inner sleeve rod fixedly installed on one side. Each inner sleeve rod has a bearing four sleeved on the outside. Each bearing four has a pressure roller sleeved on the outside.

[0006] Preferably, a bearing is sleeved on the outer side of the cutter arm shaft, and a bearing seat is fixedly installed on the outer side of the bearing. An expansion sleeve is sleeved on the outer side of the end of the cutter arm shaft.

[0007] Preferably, a bearing second is sleeved on the outer side of the inner rotating rod away from the guide roller, and a bearing seat second is sleeved on the outer side of the bearing second.

[0008] Preferably, a cylinder fixing shaft is fixedly installed on the top of each of the two cylinders.

[0009] Preferably, the outer side of the rack meshes with the outer side of the material-cutting gear, and the outer side of the material-cutting arm meshes with the outer side of the positioning gear.

[0010] Preferably, the positions of the four pressure rollers correspond to the positions of the two material breaking gears and the two positioning gears, and the outer sides of the four pressure rollers are in contact with the outer side of the rack.

[0011] Compared with the prior art, the beneficial effects of this utility model are: by realizing the reciprocating up and down movement of the output end of the cylinder, the cutting blade can be reciprocated to swing back and forth, thereby cutting the cast film at intervals. Furthermore, the extension and retraction speed of the cylinder output end can be adjusted to adjust the swing frequency of the cutting blade, thereby adjusting the cutting interval of the cast film. By adjusting the extension and retraction speed of the cylinder, the cutting interval can be flexibly changed, which can meet the high-frequency cutting requirements of small-sized film segments as well as the low-frequency cutting requirements of large-sized film segments, and is compatible with the production of products of different specifications. In addition, the pressure roller can limit and guide the movement of the rack, ensuring that the trajectory and angle of the cutting blade are consistent each time it swings, and the cutting position deviation can be controlled within ±0.1mm, avoiding product scrap due to inaccurate cutting position. Attached Figure Description Figure 1 This is a three-dimensional structural diagram of the present utility model.

[0012] Figure 2 This is a three-dimensional structural diagram of the cylinder and rack of this utility model.

[0013] Figure 3 This is a partial three-dimensional structural diagram of the present invention.

[0014] Figure 4 This is a partial appearance structural diagram of the present utility model.

[0015] In the diagram: 1. Cylinder; 2. Cutting shaft; 3. Guide roller; 4. Pressure roller seat; 5. Coupling; 6. Connecting shaft; 7. Rack; 8. Bearing seat two; 9. Pressure roller; 10. Bearing four; 11. Inner sleeve rod; 12. Bearing two; 13. Cutting arm; 14. Cutting knife; 15. Knife arm shaft; 16. Fixed insert rod; 17. Cylinder fixed shaft; 18. Cutting gear; 19. Expansion sleeve; 20. Positioning gear; 21. Bearing seat one; 22. Knife arm fixed seat; 23. Mesh; 24. Bearing three; 25. Inner rotating rod. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-4This utility model provides a technical solution: a material cutting mechanism structure for an automatic rewinding device for cast film, comprising two cylinders 1, a material cutting shaft 2, guide rollers 3, and four pressure roller seats 4. Couplings 5 ​​are installed at the output ends of both cylinders 1. A connecting shaft 6 is installed at the end of each coupling 5 away from the output end of the cylinder 1. A rack 7 is fixedly installed at the end of each connecting shaft 6 away from the coupling 5. A material cutting knife 14 is fixedly installed on the outer side of the material cutting shaft 2. Material cutting arms 13 are fixedly installed at both ends of the material cutting shaft 2. Four fixed inserts 16 are sleeved inside the end of each material cutting arm 13 away from the material cutting shaft 2. A knife arm fixing seat 22 is fixedly installed at one end of each of the four fixed inserts 16. A knife arm shaft 15 is fixedly installed on the side of the knife arm fixing seat 22 away from the fixed inserts 16. A material-cutting gear 18 is fixedly installed on the outer side of the guide roller 3. Bearings 24 are fixedly installed inside both ends of the guide roller 3. A bushing 23 is fixedly installed inside the bushing 24. An inner rotating rod 25 is sleeved inside the bushing 23. Positioning gears 20 are fixedly installed at both ends of the inner rotating rod 25. An inner sleeve rod 11 is fixedly installed on one side of each of the four pressure roller seats 4. Bearings 10 are sleeved on the outer side of each inner sleeve rod 11. Pressure rollers 9 are sleeved on the outer side of each bearing 10. The outer side of the rack 7 meshes with the outer side of the material-cutting gear 18. The outer side of the material-cutting arm 13 meshes with the outer side of the positioning gear 20. The positions of the four pressure rollers 9 correspond to the positions of the two material-cutting gears 18 and the two positioning gears 20, respectively. The outer sides of the four pressure rollers 9 are in contact with the outer side of the rack 7.

[0018] The working principle of the above technical solution is as follows: When the output end of cylinder 1 extends downward, it can push coupling 5 downward, thereby driving rack 7 to move through connecting shaft 6. This causes cutting gear 18 to rotate counterclockwise, which in turn drives cutter arm fixing seat 22 to rotate through cutter arm shaft 15. This causes cutting arm 13 to swing, which in turn causes cutting shaft 2 to swing with cutting blade 14. The serrated side of cutting blade 14 strikes the outer side of the cast film, thereby cutting the cast film. The cut film segment enters the next process. Conversely, when the output end of cylinder 1 retracts upward, it can drive rack 7 upward, causing cutting gear 18 to rotate clockwise. Finally, cutting arm 13 carries cutting shaft 2 and cutting blade. 14 is reset, thereby enabling the output end of cylinder 1 to move up and down reciprocally, allowing the cutting blade 14 to swing back and forth, thus cutting the cast film at intervals. The extension and retraction speed of the output end of cylinder 1 can be adjusted to regulate the swing frequency of the cutting blade 14, thereby adjusting the cutting interval of the cast film. By adjusting the extension and retraction speed of cylinder 1, the cutting interval can be flexibly changed, which can meet the high-frequency cutting requirements of small-sized film segments as well as the low-frequency cutting requirements of large-sized film segments, and is compatible with the production of products of different specifications. In addition, the pressure roller 9 can limit and guide the movement of the rack 7, ensuring that the trajectory and angle of the cutting blade 14 are consistent each time it swings, and the cutting position deviation can be controlled within ±0.1mm, avoiding product scrap due to inaccurate cutting position.

[0019] In another embodiment, as shown in Figure 1 (cylinder 1) and Figure 4 (pressure roller seat 4), a bearing 1 is sleeved on the outer side of the cutter arm shaft 15, and a bearing seat 21 is fixedly installed on the outer side of the bearing 1. A shrinking sleeve 19 is sleeved on the outer side of the end of the cutter arm shaft 15. A bearing 2 12 is sleeved on the outer side of the end of the inner rotating rod 25 away from the guide roller 3. A bearing seat 2 8 is sleeved on the outer side of the bearing 2 12. A cylinder fixing shaft 17 is fixedly installed on the top of each of the two cylinders 1. The positions of the four pressure rollers 9 correspond to the positions of the two material cutting gears 18 and the two positioning gears 20, respectively, and the outer sides of the four pressure rollers 9 are in contact with the outer side of the rack 7.

[0020] The bearing housing 21 can be fixed in the required position, thereby enabling the installation of the cutter arm fixing seat 22, the cutting arm 13, the cutting shaft 2, the cutting knife 14, and the cutting gear 18 in the required position. By fixing the bearing housing 8 in the required position, the inner rotating rod 25 and the guide roller 3 can be installed in the required position. The two cylinders 1 can be installed in the required position through the cylinder fixing shaft 17, thereby installing the rack 7 in the required position, so that the entire structure can operate.

[0021] Working principle: The bearing seat 21 can be fixed in the required position, thereby enabling the installation of the cutter arm fixing seat 22, the cutting arm 13, the cutting shaft 2, the cutting blade 14, and the cutting gear 18 in the required position. By fixing the bearing seat 8 in the required position, the inner rotating rod 25 and the guide roller 3 can be installed in the required position. The cylinder fixing shaft 17 can be used to install the two cylinders 1 in the required position, thereby installing the rack 7 in the required position, so that the entire structure can operate. When the output end of the cylinder 1 extends downward, the output end of the cylinder 1 can push the coupling 5 to move downward, thereby driving the rack 7 to move through the connecting shaft 6, thereby causing the cutting gear 18 to rotate counterclockwise, thereby driving the cutter arm fixing seat 22 to rotate through the cutter arm shaft 15, thereby causing the cutting arm 13 to swing, thereby causing the cutting shaft 2 to swing with the cutting blade 14. The serrated side of the cutting blade 14 hits the outer side of the cast film, thereby cutting the cast film. The film segment enters the next process. Additionally, when the output end of cylinder 1 retracts upwards, it drives rack 7 to move upwards, causing the cutting gear 18 to rotate clockwise. This ultimately resets the cutting arm 13, carrying the cutting shaft 2 and the cutting blade 14, thus enabling the output end of cylinder 1 to move up and down repeatedly. This allows the cutting blade 14 to swing back and forth, intermittently cutting the cast film. The extension and retraction speed of cylinder 1 can be adjusted to regulate the swing frequency of the cutting blade 14, thereby adjusting the cutting interval of the cast film. By adjusting the extension and retraction speed of cylinder 1, the cutting interval can be flexibly changed, meeting both the high-frequency cutting requirements of small-sized film segments and the low-frequency cutting requirements of large-sized film segments, and accommodating the production of products of different specifications. Furthermore, the pressure roller 9 can limit and guide the movement of rack 7, ensuring that the trajectory and angle of the cutting blade 14 are consistent with each swing, and the cutting position deviation can be controlled within ±0.1mm, avoiding product scrap due to inaccurate cutting position.

[0022] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material cutting mechanism structure for an automatic rewinding device for cast film, comprising two cylinders (1), a material cutting shaft (2), guide rollers (3), and four pressure roller seats (4), characterized in that: Both cylinders (1) are equipped with couplings (5) at their output ends. A connecting shaft (6) is installed at the end of each coupling (5) away from the output end of cylinder (1). A rack (7) is fixedly installed at the end of each connecting shaft (6) away from the coupling (5). A cutting blade (14) is fixedly installed on the outer side of the cutting shaft (2). Cutting arms (13) are fixedly installed at both ends of the cutting shaft (2). Four fixed inserts (16) are fitted inside the end of each cutting arm (13) away from the cutting shaft (2). A blade arm fixing seat (22) is fixedly installed at one end of each of the four fixed inserts (16). The blade arm fixing seat (22) is located away from the fixed inserts (14). 6) One side of each of the four pressure roller seats (4) is fixedly installed with a cutter arm shaft (15), and a material cutting gear (18) is fixedly installed on the outside of the cutter arm shaft (15). The guide roller (3) is fixedly installed with bearing three (24) inside both ends. The bearing three (24) is fixedly installed with a mediator (23) inside. The mediator (23) is fitted with an inner rotating rod (25). The inner rotating rod (25) is fixedly installed with positioning gears (20) at both ends. The four pressure roller seats (4) are fixedly installed with an inner sleeve rod (11) on one side. The inner sleeve rod (11) is fitted with a bearing four (10) on the outside. The bearing four (10) is fitted with a pressure roller (9) on the outside.

2. The material cutting mechanism structure of the automatic rewinding device for cast film according to claim 1, characterized in that: A bearing is sleeved on the outer side of the cutter arm shaft (15), and a bearing seat (21) is fixedly installed on the outer side of the bearing. A shrink sleeve (19) is sleeved on the outer side of the end of the cutter arm shaft (15).

3. The material cutting mechanism structure of the automatic rewinding device for cast film according to claim 2, characterized in that: The inner rotating rod (25) is fitted with a bearing second (12) on the outer side of the end away from the guide roller (3), and a bearing seat second (8) is fitted on the outer side of the bearing second (12).

4. The material cutting mechanism structure of the automatic rewinding device for cast film according to claim 3, characterized in that: The top of each of the two cylinders (1) is fixedly mounted with a cylinder fixing shaft (17).

5. The material cutting mechanism structure of the automatic rewinding device for cast film according to claim 4, characterized in that: The outer side of the rack (7) meshes with the outer side of the material breaking gear (18), and the outer side of the material breaking arm (13) meshes with the outer side of the positioning gear (20).

6. The material cutting mechanism structure of the automatic rewinding device for cast film according to claim 5, characterized in that: The positions of the four pressure rollers (9) correspond to the positions of the two material breaking gears (18) and the two positioning gears (20), and the outer sides of the four pressure rollers (9) are in contact with the outer side of the rack (7).

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