Convenient film-drawing forming telescopic claw mechanism
By designing the coordinated action of the main gripper and the auxiliary gripper, as well as the bending and tilting stretching groove structure, the problem of insufficient longitudinal tension of the film caused by the increase in the gripper spacing in the prior art was solved, achieving uniform bidirectional stretching, improving the film forming quality and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-03-03
AI Technical Summary
When the gap between the grippers increases, the existing film stretching and forming telescopic claw mechanism makes it difficult for the film to obtain sufficient longitudinal tension, which affects the film stretching and forming quality and results in uneven film thickness and inconsistent strength.
A convenient telescopic claw mechanism for film stretching is designed, including a main claw and a secondary claw. Through the coordinated action of multiple secondary clamping plates and the bending and tilting stretching groove structure, it is ensured that there is no initial distance between the claws, and a small gap is generated as stretching occurs, so as to achieve uniform longitudinal and transverse tension. Combined with cylinder and hydraulic equipment drive, energy consumption is reduced.
It effectively improves the quality of film forming, avoids problems such as uneven thickness and inconsistent strength, and reduces production costs and energy consumption.
Smart Images
Figure CN223961718U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of film stretching technology, and more specifically, to a convenient film stretching forming telescopic claw mechanism. Background Technology
[0002] Biaxial stretching is a process in which a film is stretched sequentially along both the longitudinal and transverse directions, orienting the molecular chains in both directions, followed by heat setting to produce a thin film. Biaxially stretched films exhibit significantly improved mechanical, optical, and barrier properties, possessing advantages such as high strength, good transparency, excellent stiffness, and good gas and moisture barrier properties. They are widely used in packaging, electronics, optics, and other fields, including food packaging, capacitor films, and solar cell backsheets.
[0003] The telescopic claw mechanism in film stretching is a clamping device that holds the edge of the film and applies tension to it, playing a crucial role in the entire film stretching process. Currently available film stretching telescopic claw mechanisms have multiple claws with inherent spacing between them. During the stretching operation, as the stretching process progresses, the spacing between the claws inevitably increases. While the film can be stretched laterally between the claws, the longitudinal stretching effect is significantly reduced. Due to the influence of the claw spacing, the film located between the claws cannot obtain sufficient longitudinal tension, resulting in localized areas of the film that cannot be stretched effectively. This leads to problems such as uneven thickness and inconsistent strength in the finished film, greatly affecting the quality of film stretching, increasing the defect rate, and raising production costs. Therefore, we propose a convenient telescopic claw mechanism for film stretching. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a convenient telescopic claw mechanism for film stretching and forming, so as to solve the technical problem that the film located between the claws is difficult to obtain sufficient longitudinal tension, which greatly affects the quality of film stretching and forming.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a convenient film stretching and forming telescopic claw mechanism, including a stretching mechanism and a gripper mechanism provided on the stretching mechanism. The stretching mechanism includes a mounting plate, the mounting plate includes a mounting part and a guide part, the upper end of the guide part is provided with a stretching groove, the mounting part is located at the rear end of the guide part and is L-shaped, a hydraulic device is provided on the mounting part, the hydraulic rod of the hydraulic device is provided with a mounting rod at the end, the mounting rod is provided with a stretching frame at the end, a positioning rod is installed in the stretching frame, and the gripper mechanism includes a main gripper and secondary grippers slidably disposed on the positioning rod. There are four secondary grippers, and the four secondary grippers are symmetrically distributed about the main gripper.
[0006] Preferably, there are several stretching grooves, which are curved and inclined from front to back. The angle of inclination of the stretching grooves gradually increases from the middle to both sides, and the stretching grooves are radially distributed from front to back.
[0007] Preferably, the main gripper includes a first gripping frame, the secondary gripper includes a second gripping frame, and a positioning sleeve is provided at the rear end of both the first gripping frame and the second gripping frame, the positioning sleeve being movably fitted onto the positioning rod.
[0008] Preferably, both the first clamping frame and the second clamping frame are C-shaped, both the first clamping frame and the second clamping frame include a clamping part, and both the first clamping frame and the second clamping frame are provided with a cylinder at their upper ends, with a first main clamping plate and a second main clamping plate respectively installed at the piston rod ends of the two cylinders.
[0009] Preferably, the clamping part of the first clamping frame and both sides of the first main clamping plate, as well as the clamping part of the second clamping frame and one side of the second main clamping plate, are each provided with a first auxiliary clamping plate. A second auxiliary clamping plate is provided on the side of the first auxiliary clamping plate, and a third auxiliary clamping plate is provided on the side of the second auxiliary clamping plate. A linkage rod is provided at the rear end of the lower first auxiliary clamping plate, the second auxiliary clamping plate, and the third auxiliary clamping plate. A limit sleeve is provided at the rear end of the upper first auxiliary clamping plate, the second auxiliary clamping plate, and the third auxiliary clamping plate. The upper part of the linkage rod is inserted into the limit sleeve.
[0010] Preferably, the clamping part, the first main clamping plate, the second main clamping plate, the first auxiliary clamping plate and the second auxiliary clamping plate are all provided with telescopic holes at their side ends. A tension rod is telescopically installed in the telescopic holes. The end of the tension rod is connected to the first auxiliary clamping plate, the second auxiliary clamping plate and the third auxiliary clamping plate respectively. The lower end of the first clamping frame, the second clamping frame, the first auxiliary clamping plate, the second auxiliary clamping plate and the third auxiliary clamping plate are all rotatably provided with positioning wheels. The positioning wheels are correspondingly installed in the tension groove.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. This utility model designs a first, second, and third clamping plate structure. By setting multiple first, second, and third clamping plates, and having these clamping plates move in coordination with the movement of the grippers during stretching, the initial distance between the grippers is zero, but as stretching progresses, a small distance is created. This allows the film to obtain relatively uniform and sufficient tensile force in both the longitudinal and transverse directions, effectively improving the quality of film stretching and avoiding problems such as uneven thickness and inconsistent strength in the finished film. It solves the problem that films located between the grippers cannot obtain sufficient longitudinal tensile force, which greatly affects the quality of film stretching.
[0013] 2. This utility model also incorporates a stretching groove structure. The stretching groove is curved and inclined from front to back, with the inclination angle gradually increasing from the middle to both sides, and is distributed radially outward. This not only limits the first clamping frame, the second clamping frame, the first auxiliary clamping plate, the second auxiliary clamping plate, and the third auxiliary clamping plate, but also guides them. When the stretched film moves backward, the first clamping frame, the second clamping frame, the first auxiliary clamping plate, the second auxiliary clamping plate, and the third auxiliary clamping plate can move radially outward along the trajectory of the stretching groove. This allows the gripper mechanism to stretch the film longitudinally and laterally during the backward movement, eliminating the need for other driving equipment, reducing device costs, and lowering energy consumption during the film stretching and forming process. Attached Figure Description
[0014] Figure 1 This is a front view structural diagram of the present utility model;
[0015] Figure 2 This is a schematic diagram of the mounting plate structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the gripper mechanism of this utility model;
[0017] Figure 4 This is a schematic diagram of the main gripper structure of this utility model;
[0018] Figure 5 This is a cross-sectional view of the main gripper structure of this utility model;
[0019] Figure 6 This is a cross-sectional view of the secondary gripper structure of this utility model.
[0020] Explanation of the numbers in the diagram: 100, tensioning mechanism; 101, mounting plate; 1011, mounting part; 1012, guide part; 102, hydraulic equipment; 103, mounting rod; 104, tensioning frame; 105, positioning rod; 106, tensioning groove; 107, positioning wheel; 200, gripper mechanism; 201, main gripper; 202, secondary gripper; 203, positioning sleeve; 301, first clamping frame; 3011, clamping part; 302, cylinder; 303, first main clamping plate; 304, first secondary clamping plate; 305, second secondary clamping plate; 306, third secondary clamping plate; 307, linkage rod; 308, limit sleeve; 309, tensioning rod; 401, second clamping frame; 402, second main clamping plate. Detailed Implementation
[0021] like Figures 1 to 6As shown, this utility model relates to a convenient film stretching and telescopic claw mechanism, including a stretching mechanism 100 and a gripper mechanism 200 provided on the stretching mechanism 100. The stretching mechanism 100 includes a mounting plate 101, which includes a mounting part 1011 and a guide part 1012. The upper end of the guide part 1012 is provided with a stretching groove 106. The mounting part 1011 is located at the rear end of the guide part 1012 and is L-shaped. A hydraulic device 102 is provided on the mounting part 1011. The end of the hydraulic rod of the hydraulic device 102 is provided with a mounting rod 103. The end of the mounting rod 103 is provided with a stretching frame 104. A positioning rod 105 is installed in the stretching frame 104. The gripper mechanism 200 includes a main gripper 201 and secondary grippers 202 slidably disposed on the positioning rod 105. There are four secondary grippers 202, which are symmetrically distributed about the main gripper 201. This invention features multiple auxiliary clamping plates that move in tandem with the movement of the grippers. Initially, there is no distance between the grippers, but as the film is stretched, a small distance is created between them. This allows the film to obtain relatively uniform and sufficient tension in both the longitudinal and transverse directions, effectively improving the quality of film stretching and avoiding problems such as uneven thickness and inconsistent strength in the finished film.
[0022] Specifically, several stretching grooves 106 are provided, which are curved and inclined from front to back. The inclination angle of the stretching grooves 106 gradually increases from the middle to both sides, and the stretching grooves 106 are radially distributed from front to back. The stretching grooves 106 can position and guide the first clamping frame 301, the second clamping frame 401, the first auxiliary clamping plate 304, the second auxiliary clamping plate 305, and the third auxiliary clamping plate 306, so that when the stretched film moves backward, it can move along the radially distributed trajectory of the stretching grooves 106, thereby achieving the stretching of the film.
[0023] Furthermore, the main gripper 201 includes a first clamping frame 301, and the secondary gripper 202 includes a second clamping frame 401. Positioning sleeves 203 are provided at the rear ends of both the first clamping frame 301 and the second clamping frame 401, and the positioning sleeves 203 are movably sleeved on the positioning rod 105. When the main gripper 201 and the secondary gripper 202 move along the trajectory of the stretching groove 106, the distance between the main gripper 201 and the secondary gripper 202 increases, and the positioning sleeves 203 slide accordingly on the positioning rod 105, thereby adapting to the spacing between the main gripper 201 and the secondary gripper 202.
[0024] It is worth noting that both the first clamping frame 301 and the second clamping frame 401 are C-shaped. Both the first clamping frame 301 and the second clamping frame 401 include a clamping part 3011. A cylinder 302 is provided at the upper end of both the first clamping frame 301 and the second clamping frame 401. The piston rods of the two cylinders 302 are respectively fitted with a first main clamping plate 303 and a second main clamping plate 402. When the cylinders 302 operate, the first main clamping plate 303 and the second main clamping plate 402 can be lowered, cooperating with the clamping part 3011 to clamp and fix the film. After the film is clamped, film stretching and forming can be performed.
[0025] It is worth mentioning that the clamping part 3011 of the first clamping frame 301 and both sides of the first main clamping plate 303, as well as the clamping part 3011 and one side of the second main clamping plate 402 of the second clamping frame 401, are all provided with a first auxiliary clamping plate 304. The side end of the first auxiliary clamping plate 304 is provided with a second auxiliary clamping plate 305, and the side end of the second auxiliary clamping plate 305 is provided with a third auxiliary clamping plate 306. The rear ends of the first auxiliary clamping plate 304, the second auxiliary clamping plate 305 and the third auxiliary clamping plate 306 located below are all provided with a linkage rod 307. The rear ends of the first auxiliary clamping plate 304, the second auxiliary clamping plate 305 and the third auxiliary clamping plate 306 located above are all provided with a limit sleeve 308. The upper part of the linkage rod 307 is inserted into the limit sleeve 308. The limiting sleeve 308 and the linkage rod 307 can position the first secondary clamping plate 304, the second secondary clamping plate 305, and the third secondary clamping plate 306 at the upper and lower positions. When the lower first secondary clamping plate 304, the second secondary clamping plate 305, and the third secondary clamping plate 306 move along the trajectory of the stretching groove 106, the upper first secondary clamping plate 304, the second secondary clamping plate 305, and the third secondary clamping plate 306 will also move accordingly.
[0026] It is worth noting that the side ends of the clamping part 3011, the first main clamping plate 303, the second main clamping plate 402, the first auxiliary clamping plate 304, and the second auxiliary clamping plate 305 are all provided with telescopic holes. A tension rod 309 is telescopically installed in the telescopic holes. The end of the tension rod 309 is connected to the first auxiliary clamping plate 304, the second auxiliary clamping plate 305, and the third auxiliary clamping plate 306, respectively. The lower ends of the first clamping frame 301, the second clamping frame 401, the first auxiliary clamping plate 304, the second auxiliary clamping plate 305, and the third auxiliary clamping plate 306 are all rotatably provided with positioning wheels 107, which are correspondingly installed in the tension groove 106. The tension rod 309 is not only used for the installation and connection of the first clamping plate 304, the second clamping plate 305 and the third clamping plate 306, but also for the expansion of the first clamping plate 304, the second clamping plate 305 and the third clamping plate 306 during the film stretching process, which increases the distance between the first clamping plate 304, the second clamping plate 305 and the third clamping plate 306. The tension rod 309 will extend and retract to adapt to the increased distance.
[0027] Working Principle: This embodiment provides a convenient film stretching and telescopic claw mechanism. Typically, four claws are used to stretch the film in four directions. During operation, the film to be stretched is first placed on the clamping parts 3011 of the first clamping frame 301 and the second clamping frame 401, as well as on the lower auxiliary clamping plates 304, 305, and 306. The cylinder 302 is activated, and its piston rod pushes the first main clamping plate 303 and the second main clamping plate 402 downwards. The upper auxiliary clamping plates 304, 305, and 306 follow suit, lowering the clamping parts 3011 and the lower auxiliary clamping plates 304, 305, and 306. The second and third clamping plates 305 and 306 work together to firmly clamp the film. Then, the hydraulic device 102 is activated, and its hydraulic rod extends, driving the mounting rod 103 backward, which in turn pushes the stretching frame 104 backward. Since the main gripper 201 and the secondary gripper 202 are movably mounted on the positioning rod 105 via the positioning sleeve 203, and their lower positioning wheels 107 are located within the stretching groove 106, when the stretching frame 104 moves backward, the first clamping frame 301, the second clamping frame 401, the first clamping plate 304, the second clamping plate 305, and the third clamping plate 306 move along the trajectory of the stretching groove 106 under the positioning of the positioning wheels 107, thus stretching the film. The extension slot 106 is curved and inclined from front to back, with the inclination angle gradually increasing from the middle to both sides, and is distributed radially outward. This causes the distance between the first clamping frame 301, the second clamping frame 401, the first auxiliary clamping plate 304, the second auxiliary clamping plate 305, and the third auxiliary clamping plate 306 to gradually increase during movement. At the same time, the first auxiliary clamping plate 304, the second auxiliary clamping plate 305, and the third auxiliary clamping plate 306 located below are connected to their corresponding components located above via the linkage rod 307. When the lower component moves, the upper component also moves accordingly. Furthermore, the clamping part 3011, the first main clamping plate 303, the second main clamping plate 402, the first auxiliary clamping plate 304, and the second auxiliary clamping plate 305 are located at their sides. The tension rod 309 inside the telescopic hole will extend and retract according to the increase of the distance between the first secondary clamping plate 304, the second secondary clamping plate 305 and the third secondary clamping plate 306 to adapt to the distance change. As the distance between the main clamping jaw 201 and the secondary clamping jaw 202 increases, the clamped film is subjected to tension in both the longitudinal and transverse directions, realizing bidirectional stretching. The first secondary clamping plate 304, the second secondary clamping plate 305 and the third secondary clamping plate 306 initially have no distance between the clamping jaws, but a distance is generated as stretching occurs. Moreover, due to the stacking of the number, the distance is small, so that all parts of the film can obtain a relatively uniform and sufficient tension, effectively solving the problem of poor longitudinal stretching effect of the film between the clamping jaws in the prior art, and improving the quality of film stretching.
[0028] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.
Claims
1. A convenient telescopic claw mechanism for film stretching and forming, characterized in that, The device includes a tensioning mechanism (100) and a gripper mechanism (200) mounted on the tensioning mechanism (100). The tensioning mechanism (100) includes a mounting plate (101), which includes a mounting part (1011) and a guide part (1012). The upper end of the guide part (1012) is provided with a tensioning groove (106). The mounting part (1011) is located at the rear end of the guide part (1012) and is L-shaped. A hydraulic device (1) is mounted on the mounting part (1011). 02), the hydraulic rod of the hydraulic device (102) is provided with an installation rod (103) at the end, and a tension frame (104) is provided at the end of the installation rod (103). A positioning rod (105) is installed in the tension frame (104). The gripper mechanism (200) includes a main gripper (201) and a secondary gripper (202) slidably disposed on the positioning rod (105). There are four secondary grippers (202), and the four secondary grippers (202) are symmetrically distributed about the main gripper (201).
2. The convenient telescopic claw mechanism for film stretching and forming according to claim 1, characterized in that, The stretching groove (106) is provided in a plurality of manners. The stretching groove (106) is arranged in a curved and inclined manner from front to back. The angle of inclination of the stretching groove (106) gradually increases from the middle to both sides. The stretching groove (106) is distributed radially outward from front to back.
3. The convenient telescopic claw mechanism for film stretching and forming according to claim 2, characterized in that, The main gripper (201) includes a first gripping frame (301), and the secondary gripper (202) includes a second gripping frame (401). The rear ends of the first gripping frame (301) and the second gripping frame (401) are provided with positioning sleeves (203), and the positioning sleeves (203) are movably sleeved on the positioning rod (105).
4. The convenient telescopic claw mechanism for film stretching and forming according to claim 3, characterized in that, The first clamping frame (301) and the second clamping frame (401) are both C-shaped. The first clamping frame (301) and the second clamping frame (401) both include a clamping part (3011). The upper end of the first clamping frame (301) and the second clamping frame (401) are provided with a cylinder (302). The piston rod ends of the two cylinders (302) are respectively equipped with a first main clamping plate (303) and a second main clamping plate (402).
5. A convenient telescopic claw mechanism for film stretching and forming according to claim 4, characterized in that, The clamping part (3011) of the first clamping frame (301) and the two sides of the first main clamping plate (303), as well as the clamping part (3011) of the second clamping frame (401) and the one side of the second main clamping plate (402), are provided with a first auxiliary clamping plate (304). The side end of the first auxiliary clamping plate (304) is provided with a second auxiliary clamping plate (305). The side end of the second auxiliary clamping plate (305) is provided with a third auxiliary clamping plate (306). The rear ends of the first auxiliary clamping plate (304), the second auxiliary clamping plate (305) and the third auxiliary clamping plate (306) located below are all provided with a linkage rod (307). The rear ends of the first auxiliary clamping plate (304), the second auxiliary clamping plate (305) and the third auxiliary clamping plate (306) located above are all provided with a limit sleeve (308). The upper part of the linkage rod (307) is inserted into the limit sleeve (308).
6. A convenient telescopic claw mechanism for film stretching and forming according to claim 5, characterized in that, The clamping part (3011), the first main clamping plate (303), the second main clamping plate (402), the first auxiliary clamping plate (304), and the second auxiliary clamping plate (305) are all provided with telescopic holes at their side ends. A tension rod (309) is telescopically installed in the telescopic hole. The end of the tension rod (309) is connected to the first auxiliary clamping plate (304), the second auxiliary clamping plate (305), and the third auxiliary clamping plate (306), respectively. The lower ends of the first clamping frame (301), the second clamping frame (401), the first auxiliary clamping plate (304), the second auxiliary clamping plate (305), and the third auxiliary clamping plate (306) are all rotatably provided with positioning wheels (107). The positioning wheels (107) are correspondingly installed in the tension groove (106).