Biaxial stretching device for polyimide film

Abstract

The utility model provides a polyimide film two-way stretching device which comprises a shell, an operation opening is formed in the top of the shell, four sets of third air cylinders are fixedly installed at the bottom in the shell, a hollow plate is jointly and fixedly installed at the tops of the third air cylinders, and communicated vent holes are evenly formed in the top of the hollow plate. The bottom of the hollow plate is provided with a communicated heating part in a butt joint mode, four stretching units are installed in the shell in a rectangular array mode, the top of the shell is fixedly provided with a hoisting part, the interior of the hoisting part is provided with an observation unit in a butt joint mode, and the observation unit corresponds to the hollow plate. And the observation unit comprises a mounting cover, a pressing cutter, an industrial camera and a first mounting cylinder. According to the utility model, the equipment can heat when stretching detection is carried out on the film, so that the stretching effect of the film can be detected by changing the temperature of the film and matching with the equipment when the film is stretched, and the stretching condition of the film can be observed when the observation unit equipment is used for stretching the film.

Description

Technical Field

[0001] This utility model relates to the field of polyimide film technology, and more specifically to a biaxial stretching device for polyimide films. Background Technology

[0002] Polyimide film, as a high-performance polymer film, is widely used in high-end fields such as flexible circuit boards, aerospace insulation materials, and new energy battery packaging due to its outstanding high-temperature resistance, excellent chemical stability, and high mechanical strength. To ensure that film products meet application standards, their mechanical properties (such as elastic modulus, elongation at break, and tensile strength) must be rigorously evaluated through tensile testing.

[0003] Currently, electronic universal testing machines are widely used in the industry for thin film tensile testing. According to standards such as ASTM D882, the film must be cut into strips of specific dimensions before testing. However, the current method has the following drawbacks:

[0004] 1. Operators need to manually measure and cut the film to the standard size. The cutting accuracy is easily affected by human factors, which can lead to deviations in the sample size.

[0005] 2. After being cut, the film needs to be picked up manually and transferred to the clamping area of ​​the stretching equipment. During the process, due to the ultra-thin nature of the film and the electrostatic adsorption effect, it is easy to wrinkle, bend or stick to the surface of the workbench / gloves, making transfer inconvenient. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a biaxial stretching device for polyimide films, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A biaxial stretching device for polyimide film includes: a housing, an operating port on the top of the housing, four sets of cylinders fixedly installed at the bottom inside the housing, a hollow plate fixedly installed on the top of the cylinders, and a uniformly connected air vent on the top of the hollow plate, a connected heating component installed at the bottom of the hollow plate, four sets of stretching units installed in a rectangular array inside the housing, a lifting component fixedly installed on the top of the housing, and an observation unit installed inside the lifting component, with the observation unit corresponding to the hollow plate.

[0009] The observation unit includes a mounting cover, a cutting blade, an industrial camera, and a mounting cylinder. The mounting cylinder is installed inside the hoisting component. The bottom of the mounting cylinder is connected to the mounting cover. Four sets of cutting blades are fixedly installed at the bottom of the mounting cover. An industrial camera is fixedly installed inside the mounting cylinder.

[0010] The heating component includes a second mounting cylinder, a fan, and an electric heating wire. The bottom of the hollow plate is connected to the second mounting cylinder, the electric heating wire is fixedly installed inside the second mounting cylinder, and the bottom of the second mounting cylinder is fixedly installed with a fan.

[0011] Furthermore, the hoisting component includes a mounting frame and a second cylinder. The mounting frame is fixedly mounted on the top of the housing, and the second cylinder is fixedly mounted on the top of the mounting frame. The output end of the second cylinder passes through the mounting frame and is installed and connected to the top of the mounting cover.

[0012] Furthermore, support plates are fixedly installed on all four sides of the hollow plate, and rubber pads are fixedly connected to the top of the support plates. Corresponding clamping openings are provided on the support plates and rubber pads.

[0013] Furthermore, the stretching unit includes a cylinder, a mounting base, pneumatic grippers, a sliding frame, and a slide rail. Four sets of slide rails are installed in a rectangular array at the bottom of the housing. A sliding frame is slidably installed on the slide rail. A mounting base is fixedly installed on the top of the sliding frame. Pneumatic grippers are evenly distributed on the inner side of the mounting base, and the pneumatic grippers correspond to the clamping openings.

[0014] Furthermore, a flow divider is fixedly installed inside the hollow plate, and the flow divider is located above the top of the mounting cylinder.

[0015] Furthermore, ventilation holes are provided on both sides of the hollow plate.

[0016] This invention provides a biaxial stretching device for polyimide films. Compared with the prior art, it has the following advantages:

[0017] 1. The hollow board, through the vent holes at the top and the heating components at the bottom, allows the equipment to be heated during the tensile testing of the film. This allows the film to change its own temperature during stretching, which in turn helps the equipment to detect the stretching effect, ensuring a more significant test result for the film.

[0018] 2. By observing the stretching of the film by the observation unit, the stretching of the film can be observed, and the stretching effect of the film can be understood intuitively. When the film is placed, the laid film can be pressed and cut, so that the size of the film is more regular and meets the clamping and stretching of the stretching unit. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the internal structure of this utility model is shown;

[0021] Figure 2 A schematic diagram of the overall structure of this utility model is shown;

[0022] Figure 3 A schematic diagram of the tensile unit structure of this utility model is shown;

[0023] Figure 4 A top view of the hollow plate structure of this utility model is shown;

[0024] Figure 5 A bottom view of the hollow plate structure of this utility model is shown;

[0025] Figure 6 This diagram shows the assembly structure of the hollow plate and heating component of this utility model.

[0026] Figure 7 This diagram shows the assembly structure of the surface hoisting component and the observation unit of this utility model;

[0027] As shown in the figure:

[0028] 100. Housing; 101. Operating port;

[0029] 200. Observation unit; 201. Mounting cover; 202. Cutting blade; 203. Industrial camera; 204. Mounting cylinder one;

[0030] 300. Tensioning unit; 301. Cylinder 1; 302. Mounting base; 303. Pneumatic gripper; 304. Sliding frame; 305. Slide rail;

[0031] 400. Lifting components; 401. Mounting bracket; 402. Cylinder II;

[0032] 500, Hollow core plate; 501, Ventilation holes; 502, Diverter plate;

[0033] 600. Support plate; 601. Clamping opening; 602. Rubber pad;

[0034] 700, Cylinder Three;

[0035] 800. Heating component; 801. Mounting cylinder 2; 802. Fan; 803. Electric heating wire. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] Example

[0038] To address the technical problems in the background art, the following biaxial stretching device for polyimide films is provided:

[0039] Combination Figures 1-7 As shown, the biaxial stretching device for polyimide film provided by this utility model includes: a housing 100, an operation port 101 on the top of the housing 100, four sets of cylinders 700 fixedly installed at the bottom inside the housing 100, a hollow plate 500 fixedly installed on the top of the cylinders 700, and a uniformly connected air vent 501 on the top of the hollow plate 500, a connected heating element 800 installed at the bottom of the hollow plate 500, four stretching units 300 installed in a rectangular array inside the housing 100, a lifting component 400 fixedly installed on the top of the housing 100, and an observation unit 200 installed inside the lifting component 400, with the observation unit 200 corresponding to the hollow plate 500; the operation port 101 facilitates the placement and removal of the film to be tested, and the cylinders 700 can drive the hollow plate 500 at the top. The hollow plate 500 rises, making it easier for personnel to place the film to be tested. The hollow plate 500 is heated by the air vent 501 at the top and the heating element 800 at the bottom during the stretching test of the film. This allows the film to change its own temperature during stretching to cooperate with the equipment to detect the stretching effect, ensuring a more significant test result. The stretching unit 300 clamps the four sides of the film, thereby realizing the bidirectional stretching operation of the film and enabling the equipment to perform the film testing operation. The observation unit 200 allows the equipment to observe the stretching of the film during the stretching process, intuitively understanding the stretching effect of the film. Furthermore, the laid film can be pressed and cut during placement, making the film size more regular and conforming to the clamping and stretching of the stretching unit 300.

[0040] The observation unit 200 includes a mounting cover 201, a cutting blade 202, an industrial camera 203, and a mounting cylinder 204. The mounting cylinder 204 is installed inside the hoisting component 400. The bottom of the mounting cylinder 204 is connected to the mounting cover 201. Four sets of cutting blades 202 are fixedly installed at the bottom of the mounting cover 201. The industrial camera 203 is fixedly installed inside the mounting cylinder 204. The mounting cover 201 can perform rectangular cutting on the laid film through the cutting blades 202 at the bottom, ensuring that the size of the film meets the requirements of the stretching size. During the stretching process, the industrial camera 203 can be used for real-time observation.

[0041] The heating component 800 includes a mounting cylinder 801, a fan 802, and an electric heating wire 803. The mounting cylinder 801 is connected to the bottom of the hollow plate 500. The electric heating wire 803 is fixedly installed inside the mounting cylinder 801, and the fan 802 is fixedly installed at the bottom of the mounting cylinder 801. Electric heating is achieved through the electric heating wire 803 inside the mounting cylinder 801, and the fan 802 blows hot air, heating the film. The film is then stretched using the equipment, and the stretching effect of the film during heating is observed.

[0042] In this embodiment, the hoisting component 400 includes a mounting frame 401 and a second cylinder 402. The mounting frame 401 is fixedly mounted on the top of the housing 100, and the second cylinder 402 is fixedly mounted on the top of the mounting frame 401. The output end of the second cylinder 402 passes through the mounting frame 401 and is installed and connected to the top of the mounting cover 201.

[0043] The mounting frame 401 serves as a support structure to support the hoisted structure, and the mounting cover 201 is raised and lowered by the cylinder 402.

[0044] In this embodiment, support plates 600 are fixedly installed on all four sides of the hollow plate 500, and a rubber pad 602 is fixedly connected to the top of the support plate 600. Corresponding clamping openings 601 are provided on the support plate 600 and the rubber pad 602.

[0045] The support plate 600 serves as the edge plate of the hollow plate 500. The rubber pad 602 on its top surface is at the same level as the top surface of the hollow plate 500. During this process, when the film is cut, the cutting blade 202 can cut the film at the rubber position. The rubber pad 602 provides cushioning. After the film is cut, the stretching unit 300 can extend into the clamping port 601 to complete the clamping and fixing of the film.

[0046] In this embodiment, the stretching unit 300 includes a cylinder 301, a mounting base 302, a pneumatic gripper 303, a sliding frame 304, and a slide rail 305. Four sets of slide rails 305 are installed in a rectangular array at the bottom of the housing 100. A sliding frame 304 is slidably installed on the slide rail 305. A mounting base 302 is fixedly installed on the top of the sliding frame 304. Pneumatic grippers 303 are evenly distributed on the inner side of the mounting base 302, and the pneumatic grippers 303 correspond to the clamping opening 601.

[0047] The cylinder 301 drives the mounting base 302 to move back and forth, which in turn pushes the pneumatic gripper 303 inside the mounting base 302 into the clamping port 601 and clamps the cut film. The stability of the unit during operation is ensured by the cooperation of the sliding frame 304 and the slide rail 305.

[0048] In this embodiment, a diversion plate 502 is fixedly installed inside the hollow plate 500, and the diversion plate 502 is located above the top of the mounting cylinder 801.

[0049] The flow divider 502 can be used to block the flow at the top port of the second mounting cylinder 801, preventing the hot flow inside the second mounting cylinder 801 from directly rushing in. The flow divider 502 can also be used to divert the incoming hot flow, ensuring that the hot flow can enter the hollow plate 500 evenly.

[0050] Working principle and usage process of this utility model:

[0051] During operation, cylinder 3 700 can drive the top hollow plate 500 to rise, making it easier for personnel to place the film to be tested in the rising state of the hollow plate 500. The personnel lay the film flat on the top surface of the hollow plate 500, and start cylinder 2 402 to drive the mounting cover 201 to fall. At that time, the pressure cutter 202 at the bottom of the mounting cover 201 will fall, and the pressure cutter 202 can cut the film at the rubber position. The rubber pad 602 on the support plate 600 provides cushioning.

[0052] In the second step, cylinder 700 drives the hollow plate 500 to descend, and then cylinder 301 is activated to drive the mounting base 302 to move back and forth, causing the pneumatic gripper 303 inside the mounting base 302 to advance and enter the clamping port 601 to clamp the cut film. Then, cylinder 700 is activated again to stretch the film in the opposite direction. The stretching effect of the film is observed through industrial camera 203.

[0053] The third step, after the mechanical tensile test is completed, is to further determine the heat resistance of the film by electrically heating it through the electric heating wire 803 inside the mounting cylinder 801 and blowing it with the fan 802. The hot air generated blows and heats the film, and the film is stretched with the equipment. The stretching effect of the film during heating is observed through the industrial camera 203.

[0054] During this process, the stretching condition is indirectly judged by the stretching parameters of the cylinder to determine the film performance. All the electrical components mentioned above are connected to the PLC controller for integrated control via wires. At the same time, the electrical components mentioned above, such as cylinders, pneumatic grippers, and industrial camera 203, are all existing and used in this field. The specific operating specifications need to be selected according to actual production needs.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A biaxial stretching apparatus for a polyimide film, characterized by comprising: include: The housing (100) has an operation port (101) at its top. Four sets of cylinders (700) are fixedly installed at the bottom inside the housing (100). A hollow plate (500) is fixedly installed on the top of the cylinders (700). The top of the hollow plate (500) has a uniformly connected air vent (501). A connected heating element (800) is installed at the bottom of the hollow plate (500). Four sets of stretching units (300) are installed in a rectangular array inside the housing (100). A hoisting component (400) is fixedly installed on the top of the housing (100). An observation unit (200) is installed inside the hoisting component (400), and the observation unit (200) corresponds to the hollow plate (500). The observation unit (200) includes a mounting cover (201), a cutting blade (202), an industrial camera (203), and a mounting cylinder (204). The mounting cylinder (204) is installed inside the hoisting component (400). The bottom of the mounting cylinder (204) is connected to the mounting cover (201). Four sets of cutting blades (202) are fixedly installed at the bottom of the mounting cover (201). The industrial camera (203) is fixedly installed inside the mounting cylinder (204). The heating component (800) includes a second mounting cylinder (801), a fan (802), an electric heating wire (803), and a connecting mounting cylinder (801) installed at the bottom of the hollow plate (500). The electric heating wire (803) is fixedly installed inside the second mounting cylinder (801), and the fan (802) is fixedly installed at the bottom of the second mounting cylinder (801).

2. The biaxial stretching device for polyimide film according to claim 1, characterized in that: The hoisting component (400) includes a mounting frame (401) and a second cylinder (402). The mounting frame (401) is fixedly installed on the top of the housing (100), and the second cylinder (402) is fixedly installed on the top of the mounting frame (401). The output end of the second cylinder (402) passes through the mounting frame (401) and is installed and connected to the top of the mounting cover (201).

3. The biaxial stretching device for polyimide film according to claim 2, characterized in that: The hollow plate (500) is fixedly installed with support plates (600) on all four sides. A rubber pad (602) is fixedly connected to the top of the support plate (600). Corresponding clamping holes (601) are provided on the support plate (600) and the rubber pad (602).

4. The biaxial stretching device for polyimide film according to claim 3, characterized in that: The stretching unit (300) includes a cylinder (301), a mounting base (302), a pneumatic gripper (303), a sliding frame (304), and a slide rail (305). Four sets of slide rails (305) are installed in a rectangular array at the bottom of the housing (100). A sliding frame (304) is slidably installed on the slide rail (305). A mounting base (302) is fixedly installed on the top of the sliding frame (304). Pneumatic grippers (303) are evenly distributed on the inner side of the mounting base (302), and the pneumatic grippers (303) correspond to the clamping opening (601).

5. The biaxial stretching device for polyimide film according to claim 3, characterized in that: A diversion plate (502) is fixedly installed inside the hollow plate (500), and the diversion plate (502) is located above the top of the mounting cylinder (801).

6. The biaxial stretching device for polyimide film according to claim 5, characterized in that: Both sides of the hollow plate (500) are provided with exhaust holes.

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