A film blowing machine guide mechanism

Abstract

The utility model relates to the technical field of plastic film processing equipment discloses a guiding mechanism of film blowing machine, including frame and setting on the calender roll group of frame, and calender roll group includes at least three vertical parallel settings and one in the top transverse right parallel setting's roller, and plastic film passes between two roller and extends outward. Compared with prior art, the advantages are that: the radial deformation of roller is driven through the thermal expansion and contraction of heat conducting medium, the flow guide pipe of temperature sensitive memory alloy valve piece is combined with the conduction mechanism, the temperature change in the film forming process can be responded in real time, the local deformation compensation of roller is realized, the dynamic adjustment of the gap between rollers can be quickly completed, the raw material impact load is effectively buffered, the sudden change of film thickness caused by instantaneous pressure fluctuation is avoided, the stretching rate demand of each calendering stage is accurately matched, the lifting linkage mechanism of synchronous connection unit is matched, and the transmission chain is not interrupted when the gap of roller is adjusted.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic film processing equipment, specifically to a guiding mechanism for a film blowing machine. Background Technology

[0002] In the process of producing plastic film using a blown film machine, calendering is one of the key processes, and the guiding mechanism is particularly important. Its core is to achieve film thickness control and surface shaping through the extrusion and stretching action of the roller group.

[0003] Precise control of the roller gap is crucial for ensuring uniform film thickness. Traditional calendering equipment relies on a thermocouple and electronically controlled valve adjustment system, which has a long response time to temperature changes and cannot compensate for temperature fluctuations in heat-sensitive materials in a timely manner. Especially when processing highly elastic or temperature-sensitive materials, rigid rollers cannot compensate for uneven raw material flow through deformation. In addition, traditional hydraulic systems lack effective buffering against instantaneous pressure impacts from uneven material particles, resulting in large roller gap deviations. Over long-term operation, roller wear requires manual adjustment, leading to high maintenance costs and the absence of an automatic compensation mechanism. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned difficulties and provide a guiding mechanism for a thin film blowing machine.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A guiding mechanism for a film blowing machine includes a frame and a calendering roll assembly mounted on the frame. The calendering roll assembly includes at least three vertically parallel rolls and one horizontally parallel roll at the top. A plastic film passes between two rolls and extends outward. The rolls are hollow and divided into several segments along the axial direction. Several elastic air bladders are evenly distributed around the inner wall of each segment. The elastic air bladders in adjacent segments are interconnected. The elastic air bladders are filled with a heat-conducting medium that contacts the rolls. The thermal expansion and contraction of the heat-conducting medium drives the outer wall of the rolls to produce radial elastic deformation. The two ends of the rolls are slidably mounted on the outside of the frame through bearing seats. The frame is provided with a roll adjustment mechanism for adjusting the roll gap, including a hydraulic buffer cylinder and a compression spring disposed between the bearing seats and the frame.

[0007] The frame is also equipped with a transmission mechanism that enables synchronous transmission of each roller, including a bevel gear set at the end of the roller and a power input unit on the frame. Adjacent rollers transmit power through meshing bevel gears. The transmission ratio of the bevel gear set is configured according to the speed difference of the rollers, so that adjacent rollers arranged horizontally in parallel rotate in opposite directions at the same speed, and rollers arranged vertically in parallel rotate in the same direction at different speeds.

[0008] As an improvement, the sections of the roller are connected by elastic metal sheets, and the elastic air bladders of adjacent sections are connected by a guide tube. A temperature-sensitive shape memory alloy valve is installed in the guide tube. When the surface temperature of the roller exceeds a preset threshold, the shape memory alloy valve deforms and opens the guide tube, realizing the flow of heat transfer medium between the elastic air bladders.

[0009] As an improvement, the roller adjustment mechanism further includes a slide block disposed on the outer wall of the frame and slidably connected to each bearing seat. The cylinder body of the hydraulic buffer cylinder is fixed on the mounting bracket 1 on the outer wall of the frame. The top end of the piston rod is connected to the bearing seat. The compression spring is sleeved on the outside of the hydraulic buffer cylinder and its two ends abut against the mounting bracket 1 and the bearing seat respectively.

[0010] As an improvement, the hydraulic buffer cylinder is provided with several throttling damping holes, which cooperate with the compression spring to achieve dynamic balance of the roller gap.

[0011] As an improvement, the power input unit includes a second mounting bracket mounted on the frame, on which a power motor is mounted. The output shaft of the power motor is connected to a transverse transmission rod. The bevel gear set includes a driven bevel gear mounted on the drive end of each roller and a first driving bevel gear sleeved and fixed on the transverse transmission rod and meshing with the driven bevel gear. The second driving bevel gear is sleeved and fixed at the end of the transverse transmission rod. The second driving bevel gear changes the transmission direction and drives each vertically parallel roller to rotate in the same direction by cooperating with an intermediate transmission unit mounted on the frame.

[0012] As an improvement, the intermediate transmission unit includes a vertical transmission rod rotatably mounted on the bottom mounting bracket one, and an intermediate transmission bevel gear that meshes with each driven bevel gear is sleeved on the vertical transmission rod, wherein the intermediate transmission bevel gear at the top also meshes with the driving bevel gear two.

[0013] As an improvement, the bearing housing is provided with a synchronous connection unit that moves up and down with the roller. The synchronous connection unit includes a connecting plate arranged on the side of each vertically parallel bearing housing. The connecting plate has a pre-reserved rotating groove. The outer wall of the intermediate transmission bevel gear is provided with a rotating ring that is circumferentially connected to the rotating groove. A connecting arm is provided between adjacent bearing housings arranged horizontally at the top. A bent connecting frame is provided on the side of the top connecting plate that is rotatably connected to the horizontal transmission rod. A connecting arm is provided between the second mounting frame and the adjacent bearing housing.

[0014] As an improvement, the number of teeth of each driven bevel gear arranged vertically in parallel is different, and the ratio is made according to the speed difference of the vertically parallel rollers to achieve different vertical speeds.

[0015] The advantages of this utility model compared with the prior art are as follows:

[0016] 1. The elastic airbag of this utility model drives the radial deformation of the roller through the thermal expansion and contraction of the heat-conducting medium. Combined with the flow-guiding mechanism of the temperature-sensitive memory alloy valve plate, it can respond to the temperature changes in the film forming process in real time, realize the local deformation compensation of the roller, solve the problem that the traditional rigid roller cannot dynamically adapt to the temperature gradient of the raw material, and significantly improve the uniformity of film thickness.

[0017] 2. The composite structure of the hydraulic buffer cylinder and compression spring of this utility model, through the coordinated design of the throttling damping orifice and the elastic modulus, can quickly complete the dynamic adjustment of the roller gap, effectively buffer the impact load of the raw material, avoid the sudden change in film thickness caused by instantaneous pressure fluctuations, and reduce equipment vibration noise.

[0018] 3. The bevel gear set of this utility model achieves synchronous transmission of horizontal rollers in opposite directions and differential transmission of vertical rollers in the same direction through differentiated transmission ratio design, accurately matching the stretching rate requirements of each calendering stage. With the lifting linkage mechanism of the synchronous connection unit, it ensures that the transmission chain is not interrupted when the rollers adjust the gap, and the transmission synchronization accuracy is high. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the appearance of this utility model. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the appearance of this utility model. Figure 2 .

[0021] Figure 3 This is a cross-sectional view of the present invention. Figure 1 .

[0022] Figure 4 This is a utility model Figure 2 Enlarged diagram of point A.

[0023] Figure 5 This is an exploded view of the roller of this utility model. Figure 1 .

[0024] Figure 6 This is an exploded view of the roller of this utility model. Figure 2 .

[0025] Figure 7 This is a utility model Figure 6 Enlarged diagram of point B.

[0026] Figure 8 This is a cross-sectional view of the present invention. Figure 2 .

[0027] Figure 9 This is a utility model Figure 8 Enlarged diagram of point C.

[0028] Figure 10 This is an exploded view of part of the structure of this utility model.

[0029] Figure 11 This is a utility model Figure 10 Enlarged diagram of point D.

[0030] As shown in the figure: 1. Frame; 2. Roller; 21. Elastic metal sheet; 22. Guide tube; 23. Memory alloy valve plate; 3. Plastic film; 4. Elastic airbag; 5. Bearing seat; 6. Roller adjustment mechanism; 61. Hydraulic buffer cylinder; 62. Compression spring; 63. Slide; 64. Mounting bracket one; 641. Vertical transmission rod; 65. Piston rod; 66. Throttling damping orifice; 7. Transmission mechanism; 71. Driven bevel gear; 72. Driven bevel gear one; 73. Driven bevel gear two; 74. Intermediate transmission unit; 742. Intermediate transmission bevel gear; 8. Power input unit; 81. Mounting bracket two; 82. Power motor; 83. Horizontal transmission rod; 9. Synchronous connection unit; 91. Connecting plate; 92. Rotary groove; 93. Rotary ring; 94. Connecting arm one; 95. Bending connecting frame; 96. Connecting arm two. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and attached Figure 5 As shown, a guide mechanism for a film blowing machine includes a frame 1. The frame 1 is a frame structure, and the bottom can be fixed to the ground with anchor bolts. A calendering roller group is installed on the frame 1. The calendering roller group includes at least three vertically parallel rollers and one horizontally parallel roller 2 at the top. The plastic film 3 passes through the space between two rollers 2 and extends outward.

[0033] The roller 2 mounted on the frame 1 is a hollow structure and is divided into several sections along the axial direction. Several elastic air bladders 4 are evenly distributed circumferentially on its inner wall. The elastic air bladders 4 of adjacent sections are interconnected. The elastic air bladders 4 are filled with heat-conducting medium and contact the roller 2. The thermal expansion and contraction of the heat-conducting medium drives the outer wall of the roller 2 to produce radial elastic deformation. The two ends of the roller 2 are slidably mounted on the outside of the frame 1 through bearing seats 5. The frame 1 is provided with a roller adjustment mechanism 6 for adjusting the gap between the rollers 2. The roller adjustment mechanism 6 includes a hydraulic buffer cylinder 61 and a compression spring 62 set between the bearing seat 5 and the frame 1. The frame 1 is also provided with a transmission mechanism 7 that enables the rollers 2 to drive synchronously. The transmission mechanism 7 includes a bevel gear set set at the end of the roller 2 and a power input unit 8 set on the frame 1. Adjacent rollers 2 achieve power transmission through meshing bevel gears. The transmission ratio of the bevel gear set is configured according to the speed difference of the rollers 2, so that adjacent rollers 2 arranged horizontally parallel rotate in opposite directions at the same speed, and rollers 2 arranged vertically parallel rotate in the same direction at different speeds.

[0034] Combined with appendix Figure 1 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 As shown, the sections of roller 2 are connected by elastic metal sheets 21, and the elastic air bladders 4 of adjacent sections are connected by guide pipes 22. A shape memory alloy valve plate 23 is provided in the guide pipe 22. When the surface temperature of roller 2 exceeds a preset threshold, the shape memory alloy valve plate 23 deforms and opens the guide pipe 22, realizing the flow of heat transfer medium between the elastic air bladders 4, thereby adjusting the deformation of roller 2 according to temperature changes.

[0035] Working principle of the roller adaptive deformation mechanism: The main body of roller 2 is made of special alloy forged steel containing chromium, molybdenum, and vanadium mixed in a special ratio. The outer layer is coated with silicone or fluororubber to achieve flexible adhesion to the film and reduce the risk of surface scratches. The hollow structure of roller 2 is divided into several independent chambers. Each chamber has eight elastic airbags 4 evenly distributed circumferentially. The elastic airbags 4 are made of high-temperature resistant silicone material (pressure resistance ≥1.5MPa, temperature resistance ≥250℃) and filled with thermally conductive silicone oil. Through the innovative design of alloy forged steel matrix + elastic coating layer + airbag thermal drive system, roller 2 achieves controllable micro-deformation, ensuring high precision in the rolling process while improving equipment stability and ease of maintenance through material self-adaptability. When the local temperature of roller 2 rises:

[0036] Thermal expansion and contraction drive deformation: The thermally conductive silicone oil expands when heated, pushing the elastic airbag 4 to expand radially, pushing the outer wall of roller 2 to bulge slightly outward, causing the outer wall of roller 2 to produce controllable elastic deformation, making the roller surface and film fit more tightly, compensating for the viscosity difference of raw materials caused by temperature changes; Temperature-sensitive valve plate control: When the temperature of a certain section of roller exceeds the preset threshold (e.g., 120℃ for PE raw materials), the nickel-titanium shape memory alloy valve plate 23 in the guide pipe 22 undergoes a phase change, opening the guide pipe 22 and achieving the flow balance of thermally conductive oil between adjacent chambers; Synergistic effect of elastic metal sheet 21: The elastic metal sheet 21 between each section of roller is made of 65Mn spring steel with a thickness of 2mm, which can ensure axial stiffness and allow radial deformation angles of ±3°, ensuring seamless connection between the sections of roller 2.

[0037] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 4 Appendix Figure 8 Appendix Figure 9 Appendix Figure 10 Appendix Figure 11 As shown, the roller adjustment mechanism 6 also includes a slide block 63 mounted on the outer wall of the frame 1 and slidably connected to each bearing seat 5. The cylinder body of the hydraulic buffer cylinder 61 is fixed on the mounting bracket 64 on the outer wall of the frame 1. The top end of the piston rod 65 is connected to the bearing seat 5. The compression spring 62 is sleeved on the outside of the hydraulic buffer cylinder 61, with its two ends abutting against the mounting bracket 64 and the bearing seat 5 respectively. Several throttling damping holes 66 are provided inside the hydraulic buffer cylinder 61. The throttling damping holes 66 cooperate with the compression spring 62 to achieve dynamic balance of the gap between the rollers 2, effectively coping with fluctuations in raw material pressure.

[0038] The working principle of the roller adjustment mechanism 6: Static gap setting: The hydraulic buffer cylinder 61 is pre-compressed by the hydraulic system. The extension length of the piston rod 65 determines the initial gap of the rollers 2 (for example, when producing 0.1mm film, the initial gap is set to 0.12mm). The compression spring 62 is pre-compressed by 10mm to provide initial support force. Dynamic pressure response: When the raw material pressure suddenly increases, the hydraulic oil in the hydraulic buffer cylinder 61 slowly flows back through the throttling damping orifice 66, the piston rod 65 contracts, and the compression spring 62 is further compressed to achieve flexible buffering. In summary, the hydraulic buffer cylinder 61 absorbs high-frequency pressure fluctuations (such as instantaneous impacts caused by uneven material particles), and the compression spring 62 provides low-frequency stiffness compensation (such as roller wear after long-term production) and maintains the initial roller gap.

[0039] Combined with appendix Figure 1 Appendix Figure 8 Appendix Figure 9 Appendix Figure 10 and attached Figure 11As shown, the power input unit 8 includes a mounting bracket 2 81 mounted on the frame 1. A power motor 82 is mounted on the mounting bracket 2 81. The output shaft of the power motor 82 is connected to a transverse transmission rod 83. The bevel gear set includes a driven bevel gear 71 mounted on the drive end of each roller 2 and a driving bevel gear 72 sleeved and fixed on the transverse transmission rod 83 and meshing with the driven bevel gear 71. The driving bevel gear 73 is sleeved and fixed at the end of the transverse transmission rod 83. The driving bevel gear 73 changes the transmission direction and drives each vertically parallel roller 2 to rotate in the same direction by cooperating with an intermediate transmission unit 74 mounted on the frame 1. The intermediate transmission unit 74 includes a vertical transmission rod 641 rotatably mounted on the bottom mounting bracket 1 64. An intermediate transmission bevel gear 742 meshing with each driven bevel gear 71 is sleeved on the vertical transmission rod 641. The top intermediate transmission bevel gear 742 also meshes with the driving bevel gear 73, realizing the transmission and steering of power. Each driven bevel gear 71, arranged vertically in parallel, has a different number of teeth. The gears are matched according to the speed difference of the vertically parallel rollers 2 to achieve different vertical speeds.

[0040] The synchronous connection unit 9 includes a connecting plate 91 set on the side of each vertically parallel bearing seat 5. The connecting plate 91 has a reserved rotating groove 92. The outer wall of the intermediate transmission bevel gear 742 is provided with a rotating ring 93 that is circumferentially connected to the rotating groove 92. A connecting arm 94 is provided between adjacent bearing seats 5 arranged horizontally at the top. A bent connecting frame 95 that is rotatably connected to the horizontal transmission rod 83 is provided on the side of the top connecting plate 91. A connecting arm 96 is provided between the second mounting frame 81 and the adjacent bearing seat 5 to ensure the synchronous connection of the transmission mechanism 7 when the roller 2 is raised and lowered, and to maintain the stability of the transmission.

[0041] The working principle of the transmission mechanism 7 and the synchronous connection unit 9: The bevel gear set of the transmission mechanism 7 is made of carburized steel. The driving bevel gear 72 (for example, with 20 teeth) meshes with the driven bevel gear 71 (for example, with 20 teeth) to achieve a 1:1 reverse transmission between the top horizontal roller 2 and the first vertical roller 2, ensuring that the film does not undergo stretching deformation at this stage. Differential transmission of the vertical roller 2: Through differentiated tooth number design (for example, the number of teeth of the driven bevel gear 71 in the vertical direction is 22, 24, and 26 respectively), combined with the intermediate transmission bevel gear 742 (for example, with 20 teeth), a speed increase ratio of 1.05:1.1:1.15 is achieved between the vertical rollers 2 to meet the requirements of progressive film stretching (stretch ratio range of 5% to 15%). Power distribution path: The output of the power motor 82 is transmitted to the active bevel gear 73 (for example, the number of teeth is set to 18) via the transverse transmission rod 83, and then drives each vertical roller 2 through the intermediate transmission unit 74, forming a high-efficiency transmission system of "single motor - multiple paths - differential ratio".

[0042] When the roller 2 is raised and lowered as a whole, the bearing seat 5 slides along the slide block 63, driving the intermediate transmission bevel gear 742 to slide on the vertical transmission rod 641 via the connecting plate 91. Since the rotating ring 93 and the rotating groove 92 are always slidably connected, the intermediate transmission bevel gear 742 always rotates within the connecting plate 91 during this process, thus ensuring that the driven bevel gear 71 and the intermediate transmission bevel gear 742 always remain meshed. The connecting arm 1 94 and the connecting arm 2 96 are made of rectangular section steel, rigidly connecting the two bearing seats 5 at the top, and rigidly connecting the bearing seats 5 to the mounting frame 2 81, so that the adjacent rollers 2 at the top are always at the same height during the raising and lowering process, and maintaining the meshing of the driving bevel gear 1 72 and the driven bevel gear 71, while maintaining the meshing of the driving bevel gear 2 73 and the intermediate transmission bevel gear 742. The edge of the rotating groove 92 is equipped with a rubber sealing ring to prevent dust from entering, and the surface of the rotating ring 93 is plated with hard chrome to ensure long-term sliding without jamming.

[0043] In the specific implementation of this utility model: First, the equipment is installed and debugged. The frame 1 is fixed on a horizontal ground, and the rollers 2, bearing seats 5, roller adjustment mechanism 6, transmission mechanism 7, and synchronous connection unit 9 are installed, ensuring that all components are installed in place and reliably connected. The hydraulic buffer cylinder 61 and compression spring 62 are adjusted to set the initial gap of the rollers 2; according to the characteristics of the plastic raw material, the speed of the power motor 82 and the transmission ratio of the bevel gear set are set to determine the speed difference of each roller 2; the preset threshold of the memory alloy valve plate 23 is set to complete the equipment initialization.

[0044] Then, the plastic film 3 is formed. The power motor 82 is started, and the transmission mechanism 7 drives each roller 2 to rotate, introducing the molten plastic into the calendering roller group. The film is formed under the extrusion and stretching of the rollers 2. During the forming process, the temperature of the rollers 2 is directly controlled by a dedicated temperature control mechanism. Specifically, the temperature of the molten plastic is a prerequisite for calendering (e.g., PVC is about 160-180℃, and the roller temperature needs to be slightly higher than this value to maintain plasticity). The temperature of the rollers 2 is monitored in real time. When the temperature exceeds the preset threshold, the shape memory alloy valve plate 23 opens the guide pipe 22, adjusts the distribution of the heat-conducting medium in the elastic air bag 4, and drives the outer wall of the rollers 2 to produce corresponding elastic deformation. At the same time, according to the change of raw material pressure, the hydraulic buffer cylinder 61 and the compression spring 62 automatically adjust the gap of the rollers 2 to ensure uniform film thickness and stable forming quality.

[0045] Finally, after film forming is completed, stop the equipment, clean and maintain it, check the connections and wear of each component, replace damaged parts in a timely manner, and prepare for the next production.

[0046] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A guiding mechanism for a film blowing machine, comprising a frame (1) and a calendering roller assembly disposed on the frame (1), the calendering roller assembly comprising at least three vertically parallel rollers and one horizontally parallel roller (2) disposed at the top, wherein a plastic film (3) passes between two rollers (2) and extends outward, characterized in that: The roller (2) is a hollow structure and is divided into several sections along the axial direction. Several elastic air bladders (4) are evenly distributed on the inner wall. The elastic air bladders (4) of adjacent sections are interconnected. The elastic air bladders (4) are filled with heat-conducting medium and contact the roller (2). The outer wall of the roller (2) is driven to produce radial elastic deformation through the thermal expansion and contraction of the heat-conducting medium. The two ends of the roller (2) are slidably installed on the outside of the frame (1) through bearing seats (5). The frame (1) is provided with a roller adjustment mechanism (6) for adjusting the gap of the roller (2). The roller adjustment mechanism (6) includes a hydraulic buffer cylinder (61) and a compression spring (62) set between the bearing seat (5) and the frame (1). The frame (1) is also provided with a transmission mechanism (7) that enables the synchronous transmission of each roller (2). The transmission mechanism (7) includes a bevel gear set at the end of the roller (2) and a power input unit (8) on the frame (1). Adjacent rollers (2) transmit power through meshing bevel gears. The transmission ratio of the bevel gear set is configured according to the speed difference of the rollers (2), so that adjacent rollers (2) arranged in parallel laterally rotate in opposite directions at the same speed, and rollers (2) arranged in parallel vertically rotate in the same direction at different speeds.

2. The guiding mechanism of a thin film blowing machine according to claim 1, characterized in that: The sections of the roller (2) are connected by elastic metal sheets (21), and the elastic airbags (4) of adjacent sections are connected by a guide pipe (22). A temperature-sensitive memory alloy valve plate (23) is installed in the guide pipe (22). When the surface temperature of the roller (2) exceeds the preset threshold, the memory alloy valve plate (23) deforms and conducts the guide pipe (22), thereby realizing the flow of heat transfer medium between the elastic airbags (4).

3. The guiding mechanism of a thin film blowing machine according to claim 1, characterized in that: The roller adjustment mechanism (6) also includes a slide block (63) disposed on the outer wall of the frame (1) and slidably connected to each bearing seat (5). The cylinder body of the hydraulic buffer cylinder (61) is fixed on the mounting bracket (64) on the outer wall of the frame (1). The top end of the piston rod (65) is connected to the bearing seat (5). The compression spring (62) is sleeved on the outside of the hydraulic buffer cylinder (61) and its two ends abut against the mounting bracket (64) and the bearing seat (5) respectively.

4. The guiding mechanism of a thin film blowing machine according to claim 1, characterized in that: The hydraulic buffer cylinder (61) is provided with several throttling damping holes (66), which cooperate with the compression spring (62) to achieve dynamic balance of the gap between the rollers (2).

5. The guiding mechanism of a thin film blowing machine according to claim 1, characterized in that: The power input unit (8) includes a mounting bracket two (81) set on the frame (1), a power motor (82) is mounted on the mounting bracket two (81), the output shaft of the power motor (82) is connected to a transverse transmission rod (83), the bevel gear set includes a driven bevel gear (71) installed on the drive end of each roller (2) and a driving bevel gear one (72) sleeved and fixed on the transverse transmission rod (83) and meshing with the driven bevel gear (71), the end of the transverse transmission rod (83) is sleeved and fixed with the driving bevel gear two (73), the driving bevel gear two (73) changes the transmission direction and drives each vertically parallel roller (2) to rotate in the same direction by cooperating with the intermediate transmission unit (74) set on the frame (1).

6. The guiding mechanism of a thin film blowing machine according to claim 5, characterized in that: The intermediate transmission unit (74) includes a vertical transmission rod (641) rotatably mounted on a bottom mounting bracket (64). An intermediate transmission bevel gear (742) that meshes with each driven bevel gear (71) is sleeved on the vertical transmission rod (641). The intermediate transmission bevel gear (742) at the top also meshes with a driving bevel gear (73).

7. The guiding mechanism of a thin film blowing machine according to claim 6, characterized in that: The bearing seat (5) is provided with a synchronous connection unit (9) that moves up and down with the roller (2). The synchronous connection unit (9) includes a connecting plate (91) provided on the side of each vertically parallel bearing seat (5). A rotating groove (92) is reserved on the connecting plate (91). A rotating ring (93) that is circumferentially connected to the rotating groove (92) is provided on the outer wall of the intermediate transmission bevel gear (742). A connecting arm (94) is provided between adjacent bearing seats (5) arranged horizontally at the top. A bent connecting frame (95) that is rotatably connected to the horizontal transmission rod (83) is provided on the side of the connecting plate (91) at the top. A connecting arm (96) is provided between the mounting frame (81) and the adjacent bearing seat (5).

8. The guiding mechanism of a thin film blowing machine according to claim 5, characterized in that: The number of teeth of each driven bevel gear (71) arranged vertically in parallel is different. The gears are matched according to the speed difference of the vertically parallel rollers (2) to achieve different vertical speeds.

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