Bidirectional film expanding mechanism

Abstract

The utility model discloses a bidirectional film expanding mechanism which comprises a base, four clamping jaw assemblies, an expanding assembly, four clamp distance adjusting assemblies and a connecting assembly, and each clamping jaw assembly comprises a plurality of clamps arranged side by side; the expansion assembly comprises #-shaped guide rails and a driving mechanism which are mounted on the base, and the four clamping jaw assemblies are fixedly connected to the four guide rails through mounting frames correspondingly; the four clamp spacing adjusting assemblies and the four clamping jaw assemblies are arranged in a one-to-one correspondence mode, each clamp spacing adjusting assembly comprises an adjusting roller rotationally connected to the mounting frame, a plurality of spiral sliding grooves are formed in the roller surface of each adjusting roller, the clamps are connected with first cam followers, the first cam followers correspond to the spiral sliding grooves in a one-to-one correspondence mode, and the first cam followers correspond to the spiral sliding grooves in a one-to-one correspondence mode. The connecting assembly is connected between the #-shaped guide rail and the clamp distance adjusting assembly. According to the two-way film expanding mechanism, the multiple clamps arranged side by side are adopted for clamping the film, and the distance between the clamps is gradually increased during stretching so as to adapt to expansion of the film.

Description

Technical Field

[0001] The utility model relates to the technical field of die expansion, in particular to a two-way film expanding mechanism. Background Technique

[0002] A die bonder, also known as a wafer expander or a die expander, is widely used in the die expansion process of the production of light-emitting diodes, LEDs, integrated circuits, and some special semiconductor devices. After the LED chips are produced by the manufacturer, the LED chips are densely fixed on the thin film. Since the gap between the LED chips is small, this kind of raw material cannot be directly picked up and fixed by the die bonder. Therefore, it is necessary to expand the thin film. Since the thin film itself has elasticity, stretching the thin film can change the distance between the LED chips on the thin film.

[0003] In the existing die bonder, the four sides of the thin film are clamped by the clamping jaws to achieve the effect of film expansion. However, the position of the thin film clamped by the clips is not stretched, resulting in wrinkles in the thin film after stretching and film expansion, which affects the quality of the thin film. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a two-way film expanding mechanism, which uses a plurality of clips arranged side by side to clamp the thin film. When stretching, the distance between the clips gradually increases to adapt to the expansion of the thin film. After the thin film is stretched and expanded, it is flat, improving the product quality.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A two-way film expanding mechanism, comprising:

[0007] A base;

[0008] An expansion component, including a cross-shaped guide rail and a driving mechanism installed on the base, and the driving mechanism is used to drive the four guide rails of the cross-shaped guide rail to move independently;

[0009] Four jaw components, which are arranged in a rectangular shape to clamp the four sides of the thin film, and the four jaw components are respectively connected to the four guide rails through a mounting frame. The jaw component includes a plurality of clips arranged side by side, and the plurality of clips are all slidably connected to the mounting frame along their arrangement direction;

[0010] Four clip spacing adjustment components, which are arranged in one-to-one correspondence with the four jaw components. The clip spacing adjustment component is used to adjust the spacing of the plurality of clips. The clip spacing adjustment component includes an adjustment roller rotatably connected to the mounting frame. A plurality of spiral chutes are arranged along the roller surface of the adjustment roller. The spiral chutes include a dense end and a dispersed end. The distance between adjacent spiral chutes gradually increases from the dense end to the dispersed end, and the distance between adjacent spiral chutes in the same axial direction is the same;

[0011] Each of the plurality of clips is connected with a first cam follower. The plurality of first cam followers correspond to the plurality of spiral chutes one by one, and the first cam followers are movably connected in the spiral chutes along the length direction of the spiral chutes. When the adjusting roller rotates, the plurality of first cam followers synchronously move in the spiral chutes from the dense end to the dispersed end, so that the distances between the plurality of clips are gradually increased;

[0012] A connecting component is connected between the grid-shaped guide rail and the clip spacing adjusting component, and is used for driving the four adjusting rollers to rotate respectively when the grid-shaped guide rail moves.

[0013] As a further improvement of the above technical solution, there are four connecting components, and the four connecting components are respectively connected to four crossing positions of the four guide rails of the grid-shaped guide rail; the connecting component includes a connecting plate, and the connecting plate is provided with a first guiding structure and a second guiding structure. The first guiding structure and the second guiding structure are respectively slidably connected to the two guide rails along the length directions of the two guide rails at the crossing position. When the connecting plate slides relative to one of the guide rails, the connecting plate moves synchronously with the other guide rail; a rack is arranged on the connecting plate, a rotating shaft is rotatably connected to the mounting frame, a spur gear is fixed on the rotating shaft, and the racks in the four connecting components are respectively meshed with the spur gears on the four mounting frames. When the rack connecting plate moves, it drives the spur gear to rotate; a gear steering component is connected between the rotating shaft and the adjusting roller, and the gear steering mechanism is used for driving the adjusting roller to rotate when the rotating shaft rotates.

[0014] As a further improvement of the above technical solution, the first guiding structure includes a second slider arranged on the top of the connecting plate and a second slide rail arranged on the guide rail along the length direction, and the second slider is slidably connected with the second slide rail.

[0015] As a further improvement of the above technical solution, the second guiding structure includes a third slider arranged on the bottom of the connecting plate and a third slide rail arranged on the guide rail along the length direction, and the third slider is slidably connected with the third slide rail.

[0016] As a further improvement of the above technical solution, the clip includes an upper clip block, a lower clip block and a chuck. The chuck is installed on the upper clip block, a resisting surface is arranged at the end of the lower clip block, and the output end of the chuck can move towards or away from the resisting surface.

[0017] As a further improvement of the above technical solution, a first slide rail is provided on the mounting frame, and a plurality of first sliders are slidably connected to the first slide rail. The plurality of first sliders correspond to the lower clamping blocks of the plurality of clips one by one, and the lower clamping blocks are fixedly connected to the first sliders.

[0018] As a further improvement of the above technical solution, the mounting frame includes a support plate, a support block and a mounting plate. The four support plates are respectively fixedly connected to the four guide rails of the cross-shaped guide rail. The mounting plate is connected to the support plate through the two support blocks. The mounting plate is located above the adjusting roller. The first slide rail is mounted on the mounting plate. An avoidance opening is further provided on the mounting plate. The first cam follower passes through the avoidance opening and is connected to the spiral chute.

[0019] As a further improvement of the above technical solution, the four guide rails of the cross-shaped guide rail are respectively a first guide rail, a second guide rail, a third guide rail and a fourth guide rail. The length directions of the first guide rail and the second guide rail are arranged along the X-axis direction and are slidably connected to the base along the Y-axis direction. The length directions of the third guide rail and the fourth guide rail are arranged along the Y-axis direction and are slidably connected to the base along the X-axis direction. And the heights of the first guide rail and the second guide rail are higher than those of the third guide rail and the fourth guide rail.

[0020] As a further improvement of the above technical solution, there are four driving mechanisms. Two of the driving mechanisms are used to drive the first guide rail and the second guide rail to move along the Y-axis direction, and the other two driving mechanisms are respectively used to drive the third guide rail and the fourth guide rail to move along the X-axis direction.

[0021] As a further improvement of the above technical solution, the driving mechanism includes a motor and a lead screw module. The nuts of the lead screw modules in the four driving mechanisms are respectively connected to the first guide rail, the second guide rail, the third guide rail and the fourth guide rail.

[0022] The beneficial effects of the present invention are as follows:

[0023] Two pairs of parallel guide rails of the cross-shaped guide rail move relative to each other, and the jaw assembly is connected to the guide rail to realize the biaxial stretching of the film. Then, the cross-shaped guide rail and the clip spacing adjusting assembly are linked through the connecting assembly, so that the plurality of clips in the jaw assembly are synchronously opened with the stretching action of the film, thereby adapting to the stretching and film expansion of the film. After the film is stretched and expanded, it is flat and without wrinkles, improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the drawings and embodiments.

[0025] Figure 1 is an assembly schematic diagram of a biaxial film expanding mechanism in an embodiment of the present invention;

[0026] Figure 2 It is an assembly schematic diagram of the jaw assembly and the clip spacing adjustment assembly in the embodiment of the present utility model;

[0027] Figure 3 is Figure 2 the structural breakdown diagram of;

[0028] Figure 4 It is a structural schematic diagram of the clip in the embodiment of the present utility model;

[0029] Figure 5 It is the structural schematic of the connection component in the embodiment of the present utility model Figure 1 ;

[0030] Figure 6 It is the structural schematic of the connection component in the embodiment of the present utility model Figure 2 ;

[0031] Figure 7 is Figure 1 the partial enlarged view of A in.

[0032] Reference numerals: 1, base; 2, jaw assembly; 21, clip; 211, upper clip block; 212, lower clip block; 213, chuck; 22, mounting bracket; 221, support plate; 222, support block; 223, mounting plate; 224, avoidance opening; 225, mounting block; 23, first slide rail; 24, first slider; 25, connecting block; 3, clip spacing adjustment assembly; 31, adjusting roller; 311, spiral chute; 32, rotating shaft; 33, spur gear; 34, first helical gear; 35, second helical gear; 36, first cam follower; 4, drive mechanism; 41, motor; 42, lead screw module; 51, first guide rail; 52, second guide rail; 53, third guide rail; 54, fourth guide rail; 6, connection component; 61, connecting plate; 62, second slider; 63, third slider; 64, rack; 65, third slide rail. Detailed implementation manners

[0033] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts all fall within the scope of protection of the present utility model. In addition, all connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. For example, fixed connection / fixed installation can be selected from screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods according to needs. For example, detachable connection can be selected from screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, magic tape connection and other methods according to needs. Each technical feature in the creation of the present utility model can be interactively combined without mutual contradiction and conflict.

[0034] Referring to Figure 1 , an embodiment of the present utility model provides a bidirectional film expanding mechanism, which includes a base 1, an expansion component, a jaw component 2, a clip spacing adjustment component 3 and a connection component 6. There are four jaw components 2, and the four jaw components 2 are arranged in a rectangular shape to clamp the four sides of the film. The four jaw components 2 are connected to the expansion component, so as to stretch the film in the positive and negative directions of the X-axis and the positive and negative directions of the Y-axis from the front, back, left and right, so as to realize bidirectional stretching and film expansion, and improve the quality of die expansion; in addition, each jaw component 2 is connected with a clip spacing adjustment component 3, and the clip spacing adjustment component 3 is used to adjust the spacing of a plurality of clips 21 in the jaw component 2 to adapt to the expansion of the film during film expansion, so that the film is flat and without wrinkles after stretching and film expansion, and the clip spacing adjustment component 3 is connected to the expansion component through the connection component 6 to realize synchronous linkage, ensuring that the adjustment of the clip 21 spacing is consistent with the film stretching degree, and further improving the product quality.

[0035] In this embodiment, referring to Figure 1 , the expansion component includes a cross-shaped guide rail installed on the base 1 and a driving mechanism 4. The driving mechanism 4 is used to drive the four guide rails of the cross-shaped guide rail to move independently, so as to drive the movement of the four jaw components 2.

[0036] Specifically, the four guide rails of the cross-shaped guide rail are respectively a first guide rail 51, a second guide rail 52, a third guide rail 53 and a fourth guide rail 54. The first guide rail 51 and the second guide rail 52 are arranged along the X-axis direction, and the third guide rail 53 and the fourth guide rail 54 are arranged along the Y-axis direction. More specifically, there are a first guide rail 51, a second guide rail 52, a third guide rail 53 and a fourth guide rail 54 arranged along the X-axis direction on the base 1. The first guide rail 51 and the second guide rail 52 are arranged on the base 1 along the X-axis direction, and the third guide rail 53 and the fourth guide rail 54 are arranged along the Y-axis direction. The two ends of the third guide rail 53 and the fourth guide rail 54 are respectively connected to the first guide rail 51 and the second guide rail 52 through a slider, and the two ends of the first guide rail 51 and the second guide rail 52 are respectively connected to the third guide rail 53 and the fourth guide rail 54 through a slider. In addition, the first guide rail 51 and the second guide rail 52 are higher than the third guide rail 53 and the fourth guide rail 54, so that the movement of the four guide rails does not interfere with each other.

[0037] In this embodiment, there are four driving mechanisms 4. Two of the driving mechanisms 4 are used to drive the first guide rail 51 and the second guide rail 52 to move along the Y-axis direction, and the other two driving mechanisms 4 are respectively used to drive the third guide rail 53 and the fourth guide rail 54 to move along the X-axis direction. Specifically, the driving motor 41 includes a motor 41 and a lead screw module 42. The lead screw in the lead screw module 42 is a left-right hand double-nut lead screw, and the nuts of the lead screw modules 42 in the four driving mechanisms 4 are respectively connected to the four guide rails of the cross-shaped guide rail, so as to drive the four guide rails to move. The four driving mechanisms 4 can drive the four guide rails to move smoothly to drive the four jaw assemblies 2 to move smoothly.

[0038] In this embodiment, referring to Figures 2 - 4 , the jaw assembly 2 includes a plurality of clips 21 arranged side by side. The plurality of clips 21 are all slidably connected to a mounting bracket 22 along their arrangement direction. The clip 21 includes an upper clip block 211, a lower clip block 212 and a chuck 213. The chuck 213 can be a pneumatic chuck or a mechanical chuck. The chuck 213 is mounted on the upper clip block 211. The end of the lower clip block 212 is provided with a holding surface. The output end of the chuck 213 can move towards or away from the holding surface to clamp or loosen the film.

[0039] Further, the mounting bracket 22 includes a support plate 221, a support block 222, and a mounting plate 223. The support plates 221 in the four mounting brackets 22 are respectively fixedly connected to the first guide rail 51, the second guide rail 52, the third guide rail 53, and the fourth guide rail 54. Among them, the third guide rail 53 and the fourth guide rail 54 are connected to the support plate 221 through a support plate, so that the heights of the four mounting brackets 22 are the same. The mounting plate 223 is connected to the support plate 221 through two support blocks 222. A first slide rail 23 is provided on the mounting plate 223. A plurality of first sliders 24 are slidably connected to the first slide rail 23. The plurality of first sliders 24 correspond to the lower clamping blocks 212 of the plurality of clips 21 one by one, and the lower clamping blocks 212 are fixedly connected to the first sliders 24, so that the plurality of clips 21 can move independently, facilitating the adjustment of the spacing between the clips 21.

[0040] In this embodiment, the clip spacing adjustment assembly 3 includes an adjustment roller 31 rotatably connected to the mounting bracket 22. A plurality of spiral chutes 311 are provided along the roller surface of the adjustment roller 31. The spiral chutes 311 include a dense end and a dispersed end. The spacing between adjacent spiral chutes 311 gradually increases from the dense end to the dispersed end, and the spacing between adjacent spiral chutes 311 in the same axial direction is the same.

[0041] The bottoms of the plurality of clips 21 are all connected with first cam followers 36. Specifically, a connecting block 25 is fixed to the bottom of the lower clamping block 212, and the first cam follower 36 is fixed to the bottom of the connecting block 25. The plurality of first cam followers 36 correspond to the plurality of spiral chutes 311 one by one, and the first cam followers 36 are movably connected to the spiral chutes 311 along the length direction of the spiral chutes 311. When the adjustment roller 31 rotates, the plurality of first cam followers 36 move synchronously in the spiral chutes 311 from the dense end to the dispersed end, so that the spacing between the plurality of clips 21 gradually increases. On the contrary, the plurality of first cam followers 36 move synchronously in the spiral chutes 311 from the dispersed end to the dense end, so that the spacing between the plurality of clips 21 gradually decreases.

[0042] In addition, both ends of the adjustment roller 31 are respectively rotatably connected to the two support blocks 222. A side plate is also connected between the mounting plate 223 and the support plate 221 to cover the adjustment roller 31 and prevent sundries from entering the spiral chutes 311 on the adjustment roller 31. An avoidance opening 224 is also provided on the mounting plate 223. The first cam follower 36 passes through the avoidance opening 224 and is connected to the spiral chutes 311.

[0043] In this embodiment, the connection component 6 is connected between the cross-shaped guide rail and the clip spacing adjustment component 3, and is used to drive the four adjustment rollers 31 to move in the same direction as the four guide rails of the cross-shaped guide rail when the cross-shaped guide rail moves.

[0044] Specifically, referring to Figure 1 , Figure 5 , Figure 6 and Figure 7 , the connection component 6 includes four, and the four connection components 6 are respectively connected to four cross positions of the four guide rails of the cross-shaped guide rail. Specifically, the connection component 6 includes a connection plate 61, and the connection plate 61 is provided with a first guiding structure and a second guiding structure, and the first guiding structure and the second guiding structure are respectively slidably connected to the two guide rails along the length directions of the two guide rails at the cross position. When the connection plate 61 slides relative to one of the guide rails, the connection plate 61 moves synchronously with the other guide rail.

[0045] A rack 64 is arranged on the connection plate 61, and two mounting blocks 225 are arranged on the mounting frame 22. A rotating shaft 32 is rotatably connected between the two mounting blocks 225. One end of the rotating shaft 32 extends out of the mounting block 225 and is fixed with a spur gear 33. The racks 64 in the four connection components 6 are respectively meshed with the spur gears 33 on the four mounting frames 22. When the rack 64 of the connection plate 61 moves, it drives the spur gear 33 to rotate; a gear steering mechanism is connected between the rotating shaft 32 and the adjustment roller 31, and the gear steering mechanism is used to drive the adjustment roller 31 to rotate when the rotating shaft 32 rotates.

[0046] Further, the gear steering mechanism includes a first bevel gear 34 fixed to the end of the adjustment roller 31 and a second bevel gear 35 fixed to the rotating shaft 32. The first bevel gear 34 is meshed with the second bevel gear 35, so as to transmit the torque of the rotating shaft 32 to the adjustment roller 31 to make the adjustment roller 31 rotate.

[0047] Further, the first guiding structure includes a second slider 62 arranged on the top of the connection plate 61 and a second sliding rail arranged on the guide rail along the length direction. The second slider 62 is slidably connected with the second sliding rail. The second guiding structure includes a third slider 63 arranged on the bottom of the connection plate 61 and a third sliding rail 65 arranged on the guide rail along the length direction. The third slider 63 is slidably connected with the third sliding rail 65.

[0048] Referring to Figure 7, taking the connecting component 6 connected to the intersection position of the first guide rail 51 and the fourth guide rail 54 as an example, the second slider 62 in the connecting component 6 is connected to the second slide rail arranged at the bottom of the first guide rail 51. The second slide rail is arranged along the length direction of the first guide rail 51. The third slider 63 in the connecting component 6 is connected to the third slide rail 65 arranged at the top of the fourth guide rail 54. The third slide rail 65 is arranged along the length direction of the fourth guide rail 54. That is, when the connecting plate 61 moves along the X-axis direction with the first guide rail 51, the connecting plate 61 and the fourth guide rail 54 slide relatively in the X-axis direction; when the connecting plate 61 moves along the Y-axis direction with the fourth guide rail 54, the connecting plate 61 and the first guide rail 51 slide relatively in the Y-axis direction. In addition, the rack 64 in the connecting component 6 is arranged along the length direction of the fourth guide rail 54. That is, the rack 64 is connected to the spur gear 33 above the fourth guide rail 54. When the connecting plate 61 moves along the X-axis direction with the first guide rail 51, it drives the multiple clips 21 in the jaw assembly 2 above the fourth guide rail 54 to spread or close. Therefore, the spacing between the multiple clips 21 is adjusted synchronously with the movement of the four guide rails. That is to say, the multiple clips 21 of the four jaw assemblies 2 can all adaptively adjust the spacing of the clips 21 when the expansion component drives the film to expand. After the film is stretched and expanded, it is flat and free of wrinkles, improving the product quality.

[0049] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A two-way film expanding mechanism, characterized in that, Comprising: Base; Expansion component, including a cross-shaped guide rail and a driving mechanism mounted on the base, the driving mechanism being used to drive the four guide rails of the cross-shaped guide rail to move independently; Four jaw components, the four jaw components being arranged in a rectangular shape for clamping the four sides of the film, and the four jaw components are respectively connected to the four guide rails through a mounting frame, the jaw component including a plurality of clips arranged side by side, and the plurality of clips are all slidably connected to the mounting frame along their arrangement direction; Four clip spacing adjustment components, corresponding to the four jaw components one by one, the clip spacing adjustment component being used to adjust the spacing of the plurality of clips, the clip spacing adjustment component including an adjustment roller rotatably connected to the mounting frame, the adjustment roller being provided with a plurality of spiral chutes along its roller surface, the spiral chute including a dense end and a dispersed end, the spacing between adjacent spiral chutes gradually increases from the dense end to the dispersed end, and the spacing between adjacent spiral chutes in the same axis direction is the same; A plurality of the clips are all connected with a first cam follower, the plurality of first cam followers corresponding to the plurality of spiral chutes one by one, and the first cam follower is movably connected in the spiral chute along the length direction of the spiral chute. When the adjustment roller rotates, the plurality of first cam followers move synchronously in the spiral chute from the dense end to the dispersed end direction, so that the spacing of the plurality of clips gradually increases; Connection component, connected between the cross-shaped guide rail and the clip spacing adjustment component, and used to drive the four adjustment rollers to rotate respectively when the cross-shaped guide rail moves.

2. The two-way film expanding mechanism according to claim 1, characterized in that, There are four connection components, and the four connection components are respectively connected to the four cross positions of the four guide rails of the cross-shaped guide rail; The connection component includes a connection plate, the connection plate is provided with a first guiding structure and a second guiding structure, the first guiding structure and the second guiding structure are respectively slidably connected to the two guide rails along the length directions of the two guide rails at the cross position. When the connection plate slides relative to one of the guide rails, the connection plate moves synchronously with the other guide rail; a rack is arranged on the connection plate, a rotating shaft is rotatably connected to the mounting frame, a spur gear is fixed on the rotating shaft, and the racks in the four connection components are respectively meshed with the spur gears on the four mounting frames. When the rack connection plate moves, it drives the spur gear to rotate; a gear steering component is connected between the rotating shaft and the adjustment roller, and the gear steering component is used to drive the adjustment roller to rotate when the rotating shaft rotates.

3. The two-way film expanding mechanism according to claim 2, wherein, The first guiding structure includes a second slider arranged on the top of the connection plate and a second slide rail arranged on the guide rail along the length direction, and the second slider is slidably connected to the second slide rail.

4. The two-way film expanding mechanism according to claim 3, wherein The second guiding structure includes a third slider arranged on the bottom of the connection plate and a third slide rail arranged on the guide rail along the length direction, and the third slider is slidably connected to the third slide rail.

5. A two-way film expanding mechanism according to claim 1, characterized in that, The clip includes an upper clip block, a lower clip block and a chuck, the chuck is mounted on the upper clip block, a resisting surface is arranged at the end of the lower clip block, and the output end of the chuck can move towards or away from the resisting surface.

6. A two-way film expanding mechanism according to claim 5, characterized in that, A first slide rail is provided on the mounting bracket, and a plurality of first sliders are slidably connected to the first slide rail. The plurality of first sliders correspond one-to-one to the lower clamping blocks of the plurality of clips, and the lower clamping blocks are fixedly connected to the first sliders.

7. A bidirectional film expanding mechanism according to claim 6, wherein The mounting bracket includes a support plate, a support block and a mounting plate. The four support plates are respectively fixedly connected to the four guide rails of the cross-shaped guide rail. The mounting plate is connected to the support plate through the two support blocks. The mounting plate is located above the adjusting roller. The first slide rail is mounted on the mounting plate. An avoidance opening is further provided on the mounting plate. The first cam follower passes through the avoidance opening and is connected to the spiral chute.

8. A two-way film expanding mechanism according to claim 1, characterized in that, The four guide rails of the cross-shaped guide rail are respectively a first guide rail, a second guide rail, a third guide rail and a fourth guide rail. The length directions of the first guide rail and the second guide rail are arranged along the X-axis direction and are slidably connected to the base along the Y-axis direction. The length directions of the third guide rail and the fourth guide rail are arranged along the Y-axis direction and are slidably connected to the base along the X-axis direction. And the heights of the first guide rail and the second guide rail are higher than those of the third guide rail and the fourth guide rail.

9. The two-way film expanding mechanism according to claim 8, wherein, There are four driving mechanisms, and two of the driving mechanisms are used to drive the first guide rail and the second guide rail to move along the Y-axis direction, and the other two driving mechanisms are respectively used to drive the third guide rail and the fourth guide rail to move along the X-axis direction.

10. A bidirectional film expanding mechanism according to claim 9, characterized in that, The driving mechanism includes a motor and a lead screw module. The nuts of the lead screw modules in the four driving mechanisms are respectively connected to the first guide rail, the second guide rail, the third guide rail and the fourth guide rail.

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