Stretching and expanding mechanism for thin film

Abstract

The utility model provides a stretching and expanding mechanism for a thin film. The stretching and expanding mechanism solves the technical problems that an existing stretching and expanding mechanism for the thin film is inconvenient to observe, high in improvement cost and prone to being affected by high temperature. The driving motor is provided with two coaxial output ends, one output end of the driving motor is connected with one end of the left-handed and right-handed lead screw, and the other output end of the driving motor is connected with a lead screw; the lead screw is connected with a pointer through a first lead screw nut, the driving motor is correspondingly provided with a graduated scale, and the graduated scale is parallel to the lead screw. The utility model is widely applied to the technical field of film stretching machines.

Description

TECHNICAL FIELD

[0001] The application relates to a stretching mechanism, in particular to a stretching and expanding mechanism for a film. BACKGROUND

[0002] The processing of a polyimide film includes transverse stretching under high temperature conditions by using a stretching machine, wherein the adjustment of the track of the stretching machine needs to rely on an expanding mechanism. The expanding mechanism generally moves the track in the opposite direction by a screw rod, wherein the screw rod is partially located inside the machine box, and the driving mechanism is located outside the machine box. In order to facilitate the observation of the adjustment range, the following design appears:

[0003] For example, the utility model patent with the application number CN208789076U discloses a track adjusting device of a polyimide film stretching machine, which is provided with a single-sided guide rail with scale lines above the screw rod. The clamping mechanism connected with the screw rod is connected with the single-sided guide rail through a sliding block, so that the adjustment range is determined by observing the scale. However, when the device is located in the middle section of the stretching machine, the scale lines are located inside the equipment, which is inconvenient to observe.

[0004] For example, the invention patent with the application number CN202110810647.0 discloses a film stretching device and a chain clamp dynamic positioning method, which specifically discloses a fixed rod and a movable rod sleeved in the fixed rod, both of which are penetrated and extended to the outside of the oven of the film stretching device. The movable rod moves synchronously with the first track inside the oven, and the operator can observe the change value of the extension of the movable rod outside the oven to determine the adjustment range. However, the above structure design needs to change the structures of multiple components, which has high and complex transformation and application costs. At the same time, the movable rod and the fixed rod are partially located inside the oven, which is in a high-temperature environment for a long time, and the mechanical properties are easily affected, and the stability is poor.

[0005] Therefore, there is an urgent need for a stretching and expanding mechanism for a film which is convenient to observe, has low transformation cost and is not affected by high temperature. SUMMARY

[0006] To solve the above problems, the technical scheme adopted by the present application is to provide a stretching and expanding mechanism for a film, which comprises: a driving motor, a left and right screw rod, two transverse sliding seats, the driving motor is provided with two coaxial output ends, one output end is connected with one end of the left and right screw rod, and the other output end is connected with a screw rod; the screw rod is connected with a pointer through a first screw nut, the driving motor is correspondingly provided with a scale, and the scale is arranged in parallel with the screw rod.

[0007] Preferably, the end face opposite to the scale is provided with a linear guide rail, and the pointer is connected with a sliding block matched therewith; the top end of the scale is provided with a scale corresponding to the pointer.

[0008] Preferably, the pointer is connected to the top of the connecting plate, and the two opposite end faces of the connecting plate are respectively connected to the first lead screw nut and the slider.

[0009] Preferably, the horizontal pull slide is connected to the left and right turn screws via a second lead screw nut.

[0010] Preferably, a crossbeam is provided below the horizontal sliding block, and a support seat is provided below the crossbeam.

[0011] Preferably, the crossbeam is provided with a limiting plate to restrict the movement range of the horizontal sliding block.

[0012] Preferably, the middle and tail sections of the left and right screws are respectively provided with a middle support seat and a tail support seat.

[0013] Preferably, the drive motor is fixed to the outside of the stretching machine housing via a bearing housing.

[0014] Preferably, the left and right turn screws include a forward trapezoidal screw and a reverse trapezoidal screw, and a chain coupling connecting the two.

[0015] The advantages of this invention are its reasonable design and low modification cost. It employs a drive motor with two coaxial output ends and adds a lead screw, pointer, and scale that rotate synchronously with the left and right lead screws. The drive motor drives the left and right lead screws to rotate synchronously. When the lead screw rotates, it causes the pointer to move left and right. The adjustment range of the stretching machine track can be observed and determined by the value the pointer stops at on the scale. The lead screw, pointer, and scale are all located on the outside of the stretching machine housing, making it easier to observe, lower in modification cost, and less susceptible to high temperatures compared to existing technologies. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a film stretching and expanding mechanism provided in an embodiment of this application;

[0018] Figure 2 for Figure 1 A schematic diagram of the left-side view structure;

[0019] Figure 3 for Figure 1 A top-view structural diagram;

[0020] Figure 4 for Figure 3 EE sectional view.

[0021] Explanation of symbols in the drawings:

[0022] 1. drive motor; 2. left and right rotating screw; 3. horizontal sliding seat; 4. screw rod; 5. first screw nut; 6. pointer; 7. scale; 8. ball bearing; 9. mounting plate; 10. linear guide rail; 11. sliding block; 12. connecting plate; 13. second screw nut; 14. cross beam; 15. support base; 16. limiting plate; 17. bearing seat; 18. chain coupling; 19. forward trapezoidal screw; 20. reverse trapezoidal screw; 21. middle support base; 22. tail support base. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0024] It should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0025] Now the film stretching machine with chain wheel tensioning mechanism provided by the embodiment of the present application will be described.

[0026] Please refer to Figure 1 , it is a structural schematic view of the film stretching and expanding mechanism, which comprises a drive motor 1, a left and right rotating screw 2, and two horizontal sliding seats 3. The drive motor 1 provides power for the left and right rotating screw 2, thereby driving the two symmetrically connected horizontal sliding seats 3 on the left and right rotating screw 2 to move towards each other or move away from each other, so as to realize the expanding action of the stretching machine track. The two horizontal sliding seats 3 and the stretching machine track adopt a conventional connection method, which is prior art and will not be described in detail.

[0027] The drive motor 1 is provided with two coaxial output ends, one of which is connected with one end of the left and right rotating screw 2, and the other output end is connected with a screw rod 4, and the screw rod 4 is connected with a pointer 6 through a first screw nut 5. The drive motor 1 is also connected with a scale 7 which is arranged in parallel with the screw rod 4. The drive motor 1 drives the left and right rotating screw 2 and the screw rod 4 to rotate synchronously. When the screw rod 4 rotates, it drives the pointer 6 to move left and right. The value of the pointer 6 staying on the scale 7 can be observed to determine the adjustment range of the stretching machine track. The screw rod 4, the pointer 6 and the scale 7 are completely located outside the stretching machine box body, which is easy to observe, has low modification cost and is not easily affected by high temperature.

[0028] Further, the lead screw 4 is connected with the driving motor 1 through the ball bearing 8, and the scale 7 can be connected with the driving motor 1 through the mounting plate 9. Of course, the driving motor 1 can also adopt a speed reducer, and the structure is also coaxial double-shaft output.

[0029] In one embodiment, the end face of the scale 7 opposite to the lead screw 4 is provided with a linear guide rail 10, the pointer 6 is connected with a sliding block 11 matched with the linear guide rail 10, and the top end of the scale 7 is provided with a scale line corresponding to the pointer 6, so that the position of the pointer 6 can be observed.

[0030] Further, the top end of the pointer 6 is connected with a connecting plate 12, and the two end faces of the connecting plate 12 are connected with the first screw nut 5 and the sliding block 11 respectively. The cross slide 3 is connected with the left and right screw rods 2 through the second screw nut 13.

[0031] In one embodiment, the cross beam 14 is arranged below the cross slide 3, and the support base 15 is arranged below the cross beam 14. In order to ensure the safety of operation, the limiting plate 16 is arranged on the cross beam 14 to limit the moving range of the cross slide 3.

[0032] In one embodiment, the middle part and the tail part of the left and right screw rods 2 are respectively provided with the middle support base 21 and the tail support base 22, so that the left and right screw rods 2 are stably supported and the stability of the expansion operation process is improved.

[0033] In one embodiment, the driving motor 1 is fixed on the outside of the stretching machine box through the bearing seat 17. The bearing seat 17, the middle support base 21 and the tail support base 22 form three-point support for the left and right screw rods 2, and balance the stress.

[0034] Finally, the left and right screw rods 2 can be an integral structure or connected by two screw rods: the forward trapezoidal screw rod 19 and the reverse trapezoidal screw rod 20, and the forward trapezoidal screw rod 19 and the reverse trapezoidal screw rod 20 are connected through the chain coupling 18.

[0035] The utility model discloses a reasonable design, and the transformation cost is low, adopts the driving motor 1 with two coaxial output ends, and is additionally provided with the lead screw 4, the pointer 6 and the scale 7 that rotate synchronously with the left and right screw rods 2. The driving motor 1 drives the left and right screw rods 2 and the lead screw 4 to rotate synchronously, when the lead screw 4 rotates, the pointer 6 is driven to move left and right, and the stretching machine track adjustment amplitude can be observed and determined by the pointer 6 staying at the numerical value of the scale 7. The lead screw 4, the pointer 6 and the scale 7 are completely located on the outside of the stretching machine box, easy to observe, low transformation cost and not easy to be affected by high temperature.

[0036] The above examples are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A stretch expansion mechanism for a film comprising: Drive motor, left and right screw, two horizontal pull slide; characterized in that: the drive motor is equipped with two coaxial output ends, and one output end is connected with one end of the left and right screw, and the other output end is connected with a screw rod; the screw rod is connected with a pointer through a first screw nut; the drive motor is correspondingly provided with a scale, and the scale is arranged in parallel with the screw rod.

2. The stretch expansion mechanism for a film according to claim 1, characterized by: The end face opposite to the scale and the screw rod is provided with a linear guide rail, and the pointer is connected with a matching sliding block; the top end of the scale is provided with a scale corresponding to the pointer.

3. The stretch expansion mechanism for a film according to claim 2, characterized by: The top end of the pointer is connected with a connecting plate, and the two end faces of the connecting plate are respectively connected with the first screw nut and the sliding block.

4. The stretch expansion mechanism for a film according to any one of claims 1 to 3, characterized in that: The horizontal pull slide is connected with the left and right screw through a second screw nut.

5. The mechanism for stretch expansion of a film according to claim 4, wherein: A cross beam is arranged below the horizontal pull slide, and a supporting seat is arranged below the cross beam.

6. The mechanism for stretch expansion of a film according to claim 5, wherein: A limiting plate is arranged on the cross beam to limit the moving range of the horizontal pull slide.

7. The mechanism for stretch expansion of a film according to claim 1, wherein: Intermediate supporting seats and tail supporting seats are arranged at the middle and tail parts of the left and right screw respectively.

8. The stretch expansion mechanism for a film according to claim 1, wherein: The drive motor is fixed on the outside of the stretching machine box through a bearing seat.

9. The mechanism for stretch expansion of a film according to claim 1, wherein: The left and right screw includes a forward trapezoidal screw and a reverse trapezoidal screw and a chain coupling connecting the two.

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