A method of forming a phase difference film

Abstract

A phase difference film forming method belongs to optical film preparation technology, including the following steps: the film body is transported to the both sides of the protective edge treatment; preheating treatment; the protective edge covering area of the both sides of the film body is clamped, and the film body is stretched by moving the clamp; the film body is guided by using a guide mechanism to eliminate the deviation caused by loosening the clamping; it is changed to vertical downward conveying; it is changed to horizontal conveying again, and the area with protective edge is cut by using a slitting mechanism at the turning place, so that the film body forms a middle section and two side edge sections; the side edge section is separated from the middle section to different heights. The clamping part of the protective edge before stretching is protected to avoid clamping failure, the film body with different width and stretching strength is guided and changed in conveying after stretching, and the side edge with protective edge is removed and separated in conveying, so that the influence of the uneven area of the side edge on the phase compensation performance is avoided, and the different film body width and different protective edge covering width are adapted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical film preparation, in particular to a phase difference film forming method. BACKGROUND

[0002] In the forming process of the phase difference film, a transverse, longitudinal or oblique stretching process is needed, no matter which stretching process is used, a clamp is generally used to clamp the two sides of the film body to complete the stretching in the corresponding direction. Since the film body material itself is a thin material, even if it has a certain thickness, it will inevitably be clamped and torn, resulting in clamping failure and damage to the film body. In view of this, some existing technologies have proposed improvement schemes, such as changing the upper and lower clamps of the clamping point to an arc structure to avoid the problem of hard clamping damage, but this will complicate the structure of the clamp, which is not conducive to cost control and implementation. At the same time, although the clamping is performed by an arc surface, since the clamping point is clamped by multiple point intervals, and the stretching is completed by adjusting the interval of the clamp and moving the direction during the clamping process, the interval of the clamping part and the clamping part after stretching will be uneven. This unevenness basically exists in the clamping area range on both sides, and this unevenness will cause the predetermined phase compensation to deviate. SUMMARY

[0003] To solve the above-mentioned deficiencies of the related prior art, the present application provides a phase difference film forming method, which clamps the clamping part by pasting a protective edge before stretching to avoid clamping failure, and after stretching and forming, it conducts guided conveying and reversing conveying for film bodies of different widths and stretching strengths, and removes the side edges of the protective edge and separates them to different heights for subsequent conveying, avoiding the influence of uneven areas of the side edges on the phase compensation performance, and adapting to different film body widths and different protective edge coverage widths.

[0004] In order to achieve the purpose of the present application, the following scheme is adopted:

[0005] A phase difference film forming method, comprising the steps of:

[0006] S100, pasting a protective edge on both sides of the film body on the conveying, and the protective edge wrapping the predetermined width range area of the film body on both sides;

[0007] S200, preheating the film body during conveying;

[0008] S300, clamping both sides of the film body by using a clamp, the clamping point being located in the protective edge coverage area, and stretching the film body in a specified direction by moving the clamp;

[0009] S400, loosening the clamp on the film body after stretching, and guiding the film body being conveyed by using a guide mechanism to eliminate the deviation caused by loosening the clamp.

[0010] S500, the horizontal conveying film body is turned into vertical downward conveying by the first turning roller;

[0011] S600, after the vertical downward conveying for a first predetermined distance, the film body is turned into horizontal conveying again by the second turning roller, and the region with the protective edge is slitting by the slitting mechanism at the turning position, so that the film body forms an intermediate section and two side edge sections;

[0012] S700, the intermediate section continues to be conveyed in the horizontal direction, and the side edge sections are conveyed upwardly in a direction having an acute angle with the horizontal direction, so that the side edge sections are separated from the intermediate section to different heights;

[0013] S800, the side edge sections are turned into vertical upward conveying by the third turning roller after the slanting conveying for a second predetermined distance, and are turned into horizontal conveying by the fourth turning roller after the vertical direction conveying for a third predetermined distance, so that the side edge sections and the intermediate section are conveyed to the rear stage at different heights, in order to carry out different operations on the side edge sections and the intermediate section respectively in the rear stage process.

[0014] Further, the guide mechanism comprises a pair of guide pieces arranged to move along the width direction of the film body, the guide pieces comprise slanting sections and collimating sections, and one end of the slanting section towards the inside is connected with one end of the collimating section; when the film body continues to be conveyed is guided by the guide mechanism in step S400:

[0015] S410, the interval of the guide pieces is adjusted according to the width of the film body being processed first, so that the interval between the collimating sections matches the width of the film body;

[0016] S420, when the film body clamped is loosened and enters the guide mechanism, passes through the slanting sections and enters the collimating sections, and the process that the slanting sections on both sides gradually narrow, the film body with direction deviation is all guided to the collimating sections to be conveyed in the center.

[0017] Further, the second turning roller has a pair of cutting grooves, the slitting mechanism comprises a pair of cutting knives corresponding to the positions of the cutting grooves, the cutting knives are arranged to move along the radial direction of the second turning roller and in a direction having an included angle of 45° with the horizontal and vertical directions. The cutting knives are connected with the output shaft of a rotating motor, the rotating motor is arranged at the moving end of a linear mechanism, the fixed part of the linear mechanism is arranged to move on a seat plate, the seat plate is provided with a driving mechanism for adjusting the interval between the two linear mechanisms, and the outer side of the fixed part of the linear mechanism is connected with a pull plate through a cross bar; the second turning roller comprises an intermediate roller and adjustable rollers assembled at both ends of the intermediate roller, the cutting grooves are located on the adjustable rollers, both ends of the intermediate roller have square holes concaved inward, the square holes have springs, one end of the intermediate roller has a square column matched in the square hole and abutting against the spring, the other end has a limiting ring groove, and the upper end of the pull plate is matched in the limiting ring groove; when the region with the protective edge is slitting by the slitting mechanism at the turning position in step S600:

[0018] S610, first according to the film width and the cover width of the protection edge, the distance between the two linear mechanisms is adjusted by the driving mechanism, so that the two cutters correspond to the position to be slitting, while adjusting the position of the linear mechanism, the adjustable roller is synchronously moved under the cooperation of the cross bar, the pull plate and the limiting ring groove, so that the cutting groove corresponds to the position of the cutter;

[0019] S620, then the linear mechanism moves the rotating motor, the cutter contacts the film body at the turning position, the area with the protection edge is slitted, and the film body forms a middle section and two side edge sections.

[0020] Further, the driving mechanism comprises an adjusting motor arranged on the seat plate, the output shaft of the adjusting motor is connected with a gear, the gear is meshed with a rack on both sides, the rack is arranged on the seat plate along the length direction and is connected with a fixed part of a linear mechanism, and the distance between the two linear mechanisms is adjusted by the driving mechanism in step S610.

[0021] S611, the adjusting motor is rotated to drive the gear to rotate forward or reverse;

[0022] S612, the gear rotates to drive the racks meshed on both sides to move towards the middle or move towards the outside, so that the distance between the two linear mechanisms is adjusted.

[0023] Further, the third turning roller and the fourth turning roller on each side are connected as a whole through a fold-shaped frame, the fold-shaped frame is connected with a movable end of a lifting mechanism, and when the side edge section is inclined to be conveyed upward in a direction with an acute angle with the horizontal direction in step S700.

[0024] S710, first, the height of the fold-shaped frame is adjusted by the lifting mechanism, so that the acute angle between the center line of the third turning roller and the second turning roller and the horizontal direction reaches a predetermined acute angle;

[0025] S720, the side edge section after slitting is transferred to the third turning roller from the second turning roller, and is conveyed upward in a direction with an acute angle with the horizontal direction.

[0026] The beneficial effects of the present application are:

[0027] 1. The protection edge is pasted before stretching to protect the clamping position, so that the clamping failure is avoided, the cumbersome process of modifying the fixture structure is saved, and only the pasting of the protection edge is needed on the existing process, without the need of modifying the stretching equipment, so that the cost is saved;

[0028] 2. After stretching and forming, the film bodies with different widths and tensile strengths are guided and conveyed, and the side edges with the protection edge are removed and separated to different heights for backward conveying, so that the influence of the uneven area of the side edge on the phase compensation performance is avoided;

[0029] 3. The guiding mechanism, slitting mechanism and separating mechanism are all configured to adapt to different film widths and different protective edge coverage widths. While using a power mechanism to adjust the cutter spacing, the cutting groove position on the second steering roller can be moved synchronously and kept matching the cutter position without affecting the rotation transmission of the second steering roller itself, thereby improving operational efficiency and simplifying process implementation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A flow chart of the molding method steps of an embodiment of the present application is shown.

[0031] Figure 2 A side structural schematic diagram of the guiding mechanism, slitting mechanism, and separating mechanism in steps S400 to S800 of an embodiment of the present application is shown.

[0032] Figure 3 A schematic diagram of the three-dimensional structure of the guiding mechanism, the slitting mechanism, and the separating mechanism in steps S400 to S800 of an embodiment of the present application is shown.

[0033] Figure 4 A schematic diagram of the three-dimensional structure of the guiding mechanism, the slitting mechanism, and the separating mechanism in steps S400 to S800 of an embodiment of the present application is shown from another perspective.

[0034] Figure 5 A schematic diagram of the guide mechanism structure in step S400 of an embodiment of the present application is shown.

[0035] Figure 6 A schematic structural diagram of the slitting mechanism in step S600 of an embodiment of the present application is shown.

[0036] Figure 7 A schematic structural diagram of the second steering roller in step S600 of an embodiment of the present application is shown.

[0037] Figure 8 A schematic diagram of the combined structure of the slitting mechanism and the second steering roller in step S600 of an embodiment of the present application is shown.

[0038] Figure 9 A schematic diagram of the separation mechanism structure in step S700 and step S800 of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] The present invention provides a method for forming a phase difference film by using the following method: Figure 1 The process shown in this figure depends on the following steps: Figures 2-4 The guiding mechanism 2, the slitting mechanism 5, and the separating mechanism shown in the figure, and the detailed forming method steps include the following contents:

[0041] S100: Protective edges are applied to both sides of the film 1 being fed and conveyed, with the protective edges wrapping an area of ​​a predetermined width on both sides of the film 1. Specifically, the area requiring edge protection is appropriately set based on the current width of the film 1 and the required tensile strength. This area will serve as the clamping location and will also serve as the location for subsequent separation.

[0042] S200 , preheating the membrane 1 during transportation.

[0043] S300: Clamp the two sides of the film 1 with a clamp, with the clamping point located within the protective edge coverage area, and stretch the film 1 along a specified direction by moving the clamp. Specific stretching can be performed in the horizontal, vertical, or oblique directions depending on the requirements of the stretching process.

[0044] S400 , the clamp of the stretched film 1 is released, and the film 1 that is being transported is guided by the guide mechanism 2 to eliminate the deviation caused by the release of the clamp.

[0045] Specifically, such as Figure 4 The figure shows a schematic structural diagram of the guide mechanism 2, which includes a pair of guide members 20 that are movable along the width direction of the membrane body 1. Specifically, the guide members 20 are connected to two movable ends of a two-way cylinder 24 in different directions through a bracket 23, so that the two-way cylinder 24 can realize the mutual approach and separation of the guide members 20. The guide member 20 includes an inclined section 22 and a collimating section 21. The end of the inclined section 22 facing the inside is connected to one end of the collimating section 21, thereby forming a gradually narrowing trend, and the membrane body 1 that may be offset can be easily accommodated through the wide opening at the beginning.

[0046] Specifically, when the guiding mechanism 2 is used to guide the film body 1 that is being transported in step S400:

[0047] S410, first adjusting the spacing of the guide members 20 according to the width of the currently processed film body 1, so that the spacing between the collimating segments 21 matches the width of the film body 1;

[0048] S420, when the film body 1 is released from the clamping and enters the guide mechanism 2, it passes through the inclined section 22 and enters the collimating section 21. The inclined sections 22 on both sides gradually narrow, so that the film body 1 with direction deviation is guided to the collimating section 21 for centering transportation.

[0049] Preferably, the cross section of the guide member 20 in this embodiment is C-shaped, with the upper side and the lower side inclined upward and downward respectively, so as to adapt to the conveying and guiding of films 10 with different thicknesses.

[0050] S500 , using the first turning roller 31 , the film body 1 that is being transported horizontally is turned to be transported vertically downward.

[0051] S600, after being transported vertically downward for a first predetermined distance, the film body 1 is turned to be transported horizontally by the second turning roller 32, and the area with the protective edge is cut by the slitting mechanism 5 at the turning point, so that the film body 1 forms a middle section 12 and two side sections 11.

[0052] like Figure 7 、 Figure 8 As shown, the second steering roller 32 has a pair of cutting grooves 323, and the slitting mechanism 5 includes a pair of cutters 50 corresponding to the positions of the cutting grooves 323. The cutters 50 are arranged to move along the radial direction of the second steering roller 32 and at an angle of 45° to the horizontal and vertical directions. When the cutters 50 contact the film body 1 for slitting, the film body 1 is cut at the maximum tension point of the second steering roller 32, so as to ensure the slitting quality.

[0053] Specifically, such as Figure 6 As shown, the cutter 50 is connected to the output shaft of a rotary motor 51, which is located at the movable end of a linear mechanism 52. The linear mechanism 52 travels in the radial direction of the second deflection roller 32 and at a 45° angle to both the horizontal and vertical directions. The fixed portion of the linear mechanism 52 is movably mounted on a base plate 53. The base plate 53 is equipped with a drive mechanism for adjusting the spacing between the two linear mechanisms 52. A pull plate 58 is connected to the outer side of the fixed portion of the linear mechanism 52 via a crossbar 57.

[0054] like Figure 7As shown, the second deflection roller 32 comprises a middle roller 320 and adjustable rollers 321 assembled at both ends of the middle roller 320, and a cutting groove 323 is located on the adjustable roller 321, the middle roller 320 has a concave square hole 322 at both ends, the square hole 322 has a spring therein, one end of the middle roller 320 has a square column which is fitted into the square hole 322 and abuts against the spring, and the other end has a limiting ring groove 324, the upper end of the pull plate 58 is fitted into the limiting ring groove 324; the upper end of the pull plate 58 has a fitting hole 59, and the pull plate 58 is fitted into the limiting ring groove 324 through the fitting hole 59. Specifically, the upper part of the pull plate 58 can be spliced in two halves, so as to be conveniently assembled into the limiting ring groove 324, of course, the outer end of the limiting ring groove 324 can also be designed in a detachable assembly form, so as to facilitate the assembly of the pull plate 58. Through the fitting of the square hole 322 and the square column, the adjustable roller 321 can be adjusted in the length of the extension distance at both ends of the middle roller 320, and since it is a square fitting, the rotary power transmitted from the rotary power source connected to the outer end of the adjustable roller 321 can be transmitted to the middle roller 320, so that the adjustable roller 321 and the middle roller 320 are kept rotating together, and since the spring exists, when the position of the pull plate 58 is fixed, the adjustable roller 321 is tightly pressed between the pull plate 58 and the middle roller 320 by the spring, thereby improving the stability of the second deflection roller 32 as a whole, and the cooperation of the fitting hole 59 and the limiting ring groove 324 will not affect the transmission of the rotary power. In this way, the adjustable cutting groove 323 on the second deflection roller 32 can be adjusted without affecting the transmission of the rotary power.

[0055] Therefore, when the region with the protective edge is slitting at the deflection position by the slitting mechanism 5 in step S600, the following detailed operations are performed:

[0056] S610, first, according to the width of the film body 1 and the covering width of the protective edge, the distance between the two linear mechanisms 52 is adjusted by the driving mechanism, so that the two cutters 50 correspond to the position to be slitted, and when the position of the linear mechanism 52 is adjusted, the adjustable roller 321 moves synchronously under the cooperation of the cross rod 57, the pull plate 58 and the limiting ring groove 324, so that the cutting groove 323 keeps corresponding to the position of the cutter 50.

[0057] S620, then the linear mechanism 52 moves the rotary motor 51, so that the cutter 50 contacts the film body 1 at the deflection position, and the region with the protective edge is slitted, so that the film body 1 forms the middle section 12 and the two side edge sections 11.

[0058] The above operations are suitable for different widths of the film body 1 and different covering widths of the protective edge, thereby improving the adaptability in operation.

[0059] Specifically, in the present example, as shown in FIG. 6, the film body 1 is cut into the middle section 12 and the two side edge sections 11 by the slitting mechanism 5. Figure 6As shown, the driving mechanism includes an adjusting motor 56 arranged on the seat plate 53, an output shaft of the adjusting motor 56 is connected with a gear 55, the gear 55 is meshed with a rack 54 on both sides, the rack 54 is arranged on the seat plate 53 along the length direction and is connected with a fixed part of a linear mechanism 52 respectively, so that the interval between the two linear mechanisms 52 is adjusted by the driving mechanism in step S610, including the following operation steps:

[0060] S611, the gear 55 is driven to rotate forward or reverse by the adjusting motor 56;

[0061] S612, the gear 55 drives the two racks 54 meshed on both sides to move to the middle or move to the outside, so as to adjust the interval between the two linear mechanisms 52.

[0062] The advantage of adjusting the interval in this way is that when stopping at the adjustment position, the gear and the rack can maintain good stability due to the meshing relationship.

[0063] The step S600 of the present example can be adapted to different film body 1 widths and different protective edge coverage widths, by adjusting the cutter 50 interval through the driving mechanism, the position of the cutting groove 323 on the second deflection roller 32 is adjusted synchronously and matched, and the transmission of the rotation power of the second deflection roller 32 is not affected. The previous step solves the problem of avoiding damage or tearing caused by hard clamping in the stretching process by pasting the protective edge, and saves the trouble of modifying the stretching clamp; at the same time, the protective edge introduced in this step can be slitting in different widths to facilitate the removal of the uneven sections of the clamping point area and the non-clamping point area caused by the stretching process.

[0064] S700, the middle section 12 continues to be transported in the horizontal direction, and the side edge section 11 is inclined upward in a direction having an acute angle with the horizontal direction, so as to separate the side edge section 11 from the middle section 12 to different heights.

[0065] S800, the third deflection roller 41 is used to make the side edge section 11 transport vertically upward after being transported at an inclination for a second predetermined distance, and the fourth deflection roller 42 is used to make the side edge section 11 transport horizontally after being transported vertically for a third predetermined distance, so as to make the side edge section 11 and the middle section 12 transport to the next stage at different heights, so as to facilitate different operations on the side edge section 11 and the middle section 12 in the next stage.

[0066] Specifically, as Figure 9As shown, the third and fourth turning rollers 41 and 42 on each side are connected as a whole by the folding frame 43 to form a separating mechanism, and the folding frame 43 is connected to the movable end of a lifting mechanism 44, so that when the side edge section 11 is tilted upward in a direction having an acute angle with the horizontal direction in step S700, the following operation is performed:

[0067] S710, the height of the folding frame 43 is adjusted by the lifting mechanism 44 to make the acute angle between the axis line of the third turning roller 41 and the second turning roller 32 and the horizontal direction reach a predetermined acute angle;

[0068] S720, the slit side edge section 11 is transferred from the second turning roller 32 to the third turning roller 41 to be received, and is tilted upward in a direction having an acute angle with the horizontal direction to be transported, so that the side edge section 11 is gradually separated and transported after being slit at the second turning roller 32, so as to be separated from the middle section 12 to be reserved as early as possible.

[0069] Finally, by the method of the present example, the middle section 12 for final forming can be obtained, which is continuously transported in the horizontal direction to the next process, and the side edge area protected by the protective edge is slit into the side edge section 11 and gradually separated by the inclined upward transportation after being slit, and is also converted to horizontal transportation after two turning, so that the middle section 12 to be reserved can be received from different heights in the next process for subsequent process, and the side edge section 11 which is not required to be reserved is used for other processing.

[0070] Here, the width of the third and fourth turning rollers 41 and 42 is set to be greater than the width of the side edge section 11, so as to adapt to different film body 1 widths and different protective edge covering widths.

[0071] As a preferred mode, the lifting mechanism 44 is arranged on the upper frame 45, and the length direction of the upper frame 45 is perpendicular to the transportation direction, and the lifting mechanism 44 is arranged to move along the length direction of the upper frame 45, and by synchronous inward movement or synchronous outward movement of the lifting mechanism 44, the positions of the third and fourth turning rollers 41 and 42 in the width direction can be matched with the positions of the separated and transported side edge section 11, so as to continue collimating transportation after collimating receiving.

[0072] The above description is only a preferred embodiment of the present application, and does not mean the only or limiting the present application. Those skilled in the art should understand that various changes or equivalent replacements made to the present application without departing from the scope of the present application, all belong to the scope of protection of the present application.

Claims

1. A method for forming a phase difference film, comprising the steps of: S100, applying protective edges to both sides of the film body (1) being fed and conveyed, wherein the protective edges wrap an area within a predetermined width range on both sides of the film body (1); S200, preheating the membrane body (1) during transportation; S300, clamping the two sides of the membrane (1) with a clamp, wherein the clamping point is located within the protective edge coverage area, and stretching the membrane (1) along a specified direction by moving the clamp; S400, the film body (1) that has been stretched is loosened by the clamp, and the film body (1) that continues to be transported is guided by the guide mechanism (2) to eliminate the offset caused by loosening the clamp; the guide mechanism (2) includes a pair of guide members (20) that are arranged to move along the width direction of the film body (1), and the guide member (20) includes an inclined section (22) and a collimating section (21), and the end of the inclined section (22) facing the inner side is connected to one end of the collimating section (21), and the cross section of the guide member (20) is C-shaped, with the upper side and the lower side inclined upward and downward respectively; step S40 0, when the guiding mechanism (2) is used to guide the film body (1) that is being transported: S410, first, the spacing of the guiding members (20) is adjusted according to the width of the film body (1) being processed, so that the spacing between the collimating sections (21) matches the width of the film body (1); S420, when the film body (1) is released from the clamping and enters the guiding mechanism (2), it passes through the inclined section (22) and enters the collimating section (21), and the inclined sections (22) on both sides are gradually narrowed, so that the film body (1) with direction deviation is guided to the collimating section (21) for centering transport; S500, using a first turning roller (31) to turn the horizontally transported film (1) into a vertically downward transport; S600, after being transported vertically downward for a first predetermined distance, the film body (1) is turned to be transported horizontally using a second turning roller (32), and the area with the protective edge is cut at the turning point using a cutting mechanism (5), so that the film body (1) forms a middle section (12) and two side sections (11); S700, the middle section (12) is continuously conveyed in the horizontal direction, and the side section (11) is tilted upwardly in a direction having an acute angle with the horizontal direction, so that the side section (11) and the middle section (12) are separated to different heights; S800, using the third turning roller (41) to turn the side segment (11) to vertically upward transmission after being obliquely conveyed for a second predetermined distance, and using the fourth turning roller (42) to turn it to horizontal transmission after being conveyed in the vertical direction for a third predetermined distance, so that the side segment (11) and the middle segment (12) are conveyed to the subsequent stage at different heights, so that the subsequent process can perform different operations on the side segment (11) and the middle segment (12) respectively; in, The second steering roller (32) has a pair of cutting grooves (323). The slitting mechanism (5) includes a pair of cutters (50) corresponding to the positions of the cutting grooves (323). The cutters (50) are arranged to move along the radial direction of the second steering roller (32) and at an angle of 45° to the horizontal and vertical directions. The cutters (50) are connected to the output shaft of the rotating motor (51). The rotating motor (51) is arranged at the moving end of the linear mechanism (52). The fixed part of the linear mechanism (52) is movably arranged on a seat plate (53). The seat plate (53) is provided with a driving mechanism for adjusting the distance between the two linear mechanisms (52). The fixed part of the linear mechanism (52) is connected to the outside of the fixed part through the cross bar (5 7) connected to a pulling plate (58); the second turning roller (32) includes an intermediate roller (320) and adjustable rollers (321) assembled at both ends of the intermediate roller (320); the cutting groove (323) is located on the adjustable roller (321); both ends of the intermediate roller (320) have inwardly concave square holes (322); a spring is provided in the square hole (322); one end of the intermediate roller (320) has a square column which fits in the square hole (322) and abuts against the spring; the other end has a limiting ring groove (324); the upper end of the pulling plate (58) fits in the limiting ring groove (324); in step S600, when the area with the protective edge is cut at the turning position by using the cutting mechanism (5): S610, first, according to the width of the film body (1) and the covering width of the protective edge, the distance between the two linear mechanisms (52) is adjusted by the driving mechanism so that the two cutters (50) correspond to the positions to be cut. While adjusting the position of the linear mechanism (52), the adjustable roller (321) moves synchronously with the cross bar (57), the pull plate (58), and the limiting ring groove (324), so that the cutting groove (323) remains corresponding to the position of the cutter (50); S620, then using the linear mechanism (52) to move the rotary motor (51), so that the cutter (50) contacts the film body (1) at the turning point, and cuts the area with the protective edge, so that the film body (1) forms a middle section (12) and two side sections (11); The driving mechanism includes an adjusting motor (56) provided on the seat plate (53), the output shaft of the adjusting motor (56) is connected to a gear (55), and racks (54) are respectively engaged on both sides of the gear (55), and the racks (54) are arranged on the seat plate (53) and are movable along the length direction and are respectively connected to the fixed parts of the linear mechanisms (52); in step S610, adjusting the distance between the two linear mechanisms (52) by the driving mechanism includes: S611, by adjusting the rotation of the motor (56) to drive the gear (55) to rotate forward or reverse; S612, the gear (55) rotates to drive the meshing racks (54) on both sides to move toward the middle or toward the outside, thereby adjusting the distance between the two linear mechanisms (52).

2. The method for forming a phase difference film according to claim 1, wherein: The third steering roller (41) and the fourth steering roller (42) on each side are connected as a whole via a folding frame (43), and the folding frame (43) is connected to a movable end of a lifting mechanism (44); When the side segment (11) is conveyed upwardly in a direction having an acute angle with the horizontal direction in step S700: S710, first adjusting the height of the folding frame (43) by means of the lifting mechanism (44) so ​​that the angle between the axis connecting the third steering roller (41) and the second steering roller (32) and the horizontal direction reaches a predetermined acute angle; S720, the cut side segment (11) transitions from the second steering roller (32) to the third steering roller (41) to be carried thereon, thereby achieving upward tilted transportation in a direction having an acute angle with the horizontal direction.

3. The method for forming a phase difference film according to claim 2, wherein: The widths of the third turning roller (41) and the fourth turning roller (42) are set to be greater than the width of the side segment (11).

4. The method for forming a phase difference film according to claim 2, wherein: The lifting mechanism (44) is arranged on the upper frame (45), the length direction of the upper frame (45) is perpendicular to the transmission direction, and the lifting mechanism (44) is arranged to move along the length direction of the upper frame (45).

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