A polypropylene biaxially oriented film production line

Abstract

The present invention belongs to the field of film production lines, specifically, a polypropylene biaxially stretched film production line; it includes a quenching roller, a longitudinal stretching system is provided on one side of the quenching roller, a heating chamber is provided inside the longitudinal stretching system, a high-speed stretching roller is provided on the inner wall of the heating chamber, and a low-speed stretching roller is provided near the high-speed stretching roller, and also includes: a cleaning mechanism: the cleaning mechanism is located inside the heating chamber, the number of cleaning mechanisms is at least one, and the cleaning mechanism is used to clean the oil stains on the surface of the high-speed stretching roller; a cooling mechanism: the cooling mechanism is close to the longitudinal stretching system, and cools the high-speed stretching roller and the low-speed stretching roller; and a power mechanism: the power mechanism is close to the longitudinal stretching system. The present invention provides power to the cleaning mechanism and the cooling mechanism by setting a power mechanism, so as to achieve the purpose of cooling the high-speed stretching roller and the low-speed stretching roller.

Description

Technical Field

[0001] This invention belongs to the field of film production lines, specifically a biaxially oriented polypropylene film production line. Background Technology

[0002] Biaxially oriented polypropylene (BOP) film is generally a multi-layer co-extruded film, made by co-extruding polypropylene granules into sheets, and then stretching them in both longitudinal and transverse directions. The wide range of applications, low pollution, and protection of forest resources make BOP film a more popular packaging material than paper and polyvinyl chloride (PVC); its simple and reliable manufacturing process and reasonable price make it a more commonly used packaging material than biaxially oriented polyester (BOP) film and biaxially oriented nylon (BON) film.

[0003] However, in the production of polypropylene film, the existing technology requires heating the stretching rollers to facilitate the stretching of the polypropylene film during longitudinal stretching. When the temperature of the stretching rollers is too high, the film is prone to sticking to the rollers, resulting in longitudinal film breakage and thus affecting the efficiency of film processing.

[0004] In view of this, in order to overcome the above-mentioned technical problems, the present invention designs a polypropylene biaxially oriented film production line, which solves the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem that this invention aims to solve is that when the temperature of the stretching roller is too high, the film is prone to sticking to the roller, which can cause longitudinal film breakage and thus affect the efficiency of film processing.

[0006] This invention provides a polypropylene biaxially oriented film production line, including a control cabinet, a quenching roller on one side of the control cabinet, a longitudinal stretching system on one side of the quenching roller, a heating chamber inside the longitudinal stretching system, a high-speed stretching roller on the inner wall of the heating chamber, and a low-speed stretching roller near the high-speed stretching roller, and further comprising:

[0007] Cleaning mechanism: The cleaning mechanism is located inside the heating chamber, and there is at least one cleaning mechanism. The cleaning mechanism is used to clean oil stains on the surface of the high-speed stretching roller.

[0008] Cooling mechanism: The cooling mechanism is located near the longitudinal stretching system and cools the high-speed stretching roller and the low-speed stretching roller;

[0009] Power mechanism: The power mechanism is located near the longitudinal tensioning system and provides power to the cleaning mechanism and the cooling mechanism.

[0010] Preferably, the cleaning mechanism includes:

[0011] Cleaning chamber: The cleaning chamber is located inside the heating chamber, and cotton rope is provided inside the cleaning chamber;

[0012] Liquid storage tank: The liquid storage tank is located inside the cleaning tank, and the liquid storage tank is equipped with a degreasing agent;

[0013] Sponge: The sponge is located inside the cleaning chamber and is connected to the cotton rope.

[0014] Preferably, the liquid storage tank has a liquid inlet on one side.

[0015] Preferably, the power mechanism includes:

[0016] Motor: The motor is located on the outer surface of the heating chamber, and a gear is provided on the output shaft of the motor;

[0017] Chain: The chain meshes with the first gear, and a protrusion is provided on the surface of one link of the chain plate;

[0018] Rotating shaft: The rotating shaft is located on the outer surface of the heating chamber and is fixedly connected to the outer wall of the heating chamber;

[0019] Second gear: The second gear meshes with the chain and is rotatably connected to the rotating shaft;

[0020] Slider No. 1: The slider No. 1 is located on the outer surface of the heating chamber. A groove is formed on the surface of the slider No. 1, and connecting rods No. 1 are provided on both sides of the slider No. 1.

[0021] Fixed plate: One side of the fixed plate is connected to the first connecting rod.

[0022] Preferably, a round rod is provided on one side of the cleaning chamber, and the other end of the round rod is connected to the fixing plate.

[0023] Preferably, the cooling mechanism includes:

[0024] Turntable: The turntable is fixedly connected to the motor output shaft, and a second connecting rod is fixedly connected to the outer surface of the turntable.

[0025] Baffle: The baffle is located inside the heating chamber, and a sliding groove is formed on the surface of the baffle;

[0026] Fixed rod: The fixed rod is slidably connected to the groove opened on the surface of the baffle, and the groove is opened at one end of the fixed rod;

[0027] Second slider: One side of the second slider is fixedly connected to the second connecting rod, and the second slider is slidably connected to the groove opened at one end of the fixed rod;

[0028] Gear No. 3: Gear No. 3 is connected to the outer surface of the fixed rod, and a fan is connected to the outer surface of Gear No. 3;

[0029] Rack: The rack is located inside the heating chamber and meshes with gear number three.

[0030] Preferably, the heating chamber has exhaust holes on both sides of its inner wall.

[0031] Preferably, the heating chamber has an air outlet pipe on its inner wall, and an air outlet is formed on the surface of the air outlet pipe, with the air outlet facing the high-speed stretching roller and the low-speed stretching roller.

[0032] Preferably, one end of the air outlet pipe is connected to the fixed plate, and one side of the air outlet pipe is connected to an air inlet hose.

[0033] Preferably, one end of the air intake hose is connected to a refrigeration unit.

[0034] The beneficial effects of this invention are as follows:

[0035] 1. This invention provides a polypropylene biaxially oriented film production line. By setting a cooling mechanism, this invention cools the high-speed stretching roller and the low-speed stretching roller, thereby improving the situation of film sticking to the roller.

[0036] 2. This invention provides a polypropylene biaxially oriented film production line. By setting up a cleaning mechanism, this invention cleans the oil stains on the surface of the high-speed stretching roller and the low-speed stretching roller, preventing oil stains from contaminating the film and reducing the film quality.

[0037] 3. This invention provides a polypropylene biaxially oriented film production line. This invention provides power to the cooling mechanism by setting a power mechanism, so that the cooling mechanism can uniformly cool the surfaces of the high-speed stretching roller and the low-speed stretching roller, thereby reducing the temperature difference between the surfaces of the high-speed stretching roller and the low-speed stretching roller. Attached Figure Description

[0038] The invention will now be further described with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is the invention Figure 1 AA section view;

[0041] Figure 3 This is a schematic diagram of the slider and gear structure of the present invention;

[0042] Figure 4 This is the present invention. Figure 1 A magnified view of a portion of the image;

[0043] Figure 5 This is a schematic diagram of the cleaning mechanism of the present invention.

[0044] In the diagram: 1. Control cabinet; 2. Rapid cooling roller; 3. Longitudinal stretching system; 4. Heating chamber; 5. High-speed stretching roller; 6. Low-speed stretching roller; 7. Cleaning mechanism; 71. Cleaning chamber; 72. Cotton rope; 73. Liquid storage chamber; 74. Sponge; 8. Cooling mechanism; 8. Turntable; 81. Second connecting rod; 82. Second slider; 83. Baffle; 84. Fixed rod; 85. Third gear; 86. Fan; 87. Rack; 88. Power mechanism; 9. Motor; 91. First sprocket; 92. Chain; 93. Protrusion; 94. Rotating shaft; 95. Second sprocket; 96. First slider; 97. First connecting rod; 98. Fixed plate; 99. Liquid inlet; 10. Round rod; 11. Exhaust hole; 12. Air outlet pipe; 13. Air outlet; 14. Air inlet hose; 15. Cooling fan; 16. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] The drawback of the existing technology is that when the temperature of the stretching roller is too high, the film is prone to sticking to the roller, which can cause longitudinal film breakage and thus affect the efficiency of film processing.

[0047] To solve the above problems, the main concept adopted in this embodiment is: by setting a cooling mechanism 8 and a power mechanism 9, the power mechanism 9 outputs power to the cooling mechanism 8 so that the cooling mechanism 8 can uniformly cool the surface of the high-speed stretching roller 5 and the low-speed stretching roller 6, thereby improving the situation of film sticking to the roller.

[0048] To better understand the above technical solutions, the following will provide a detailed explanation of the above technical solutions in conjunction with the accompanying drawings and specific implementation methods;

[0049] Please see Figures 1-5 The present invention provides a polypropylene biaxially oriented film production line, comprising a control cabinet 1, a quenching roller 2 on one side of the control cabinet 1, a longitudinal stretching system 3 on one side of the quenching roller 2, a heating chamber 4 inside the longitudinal stretching system 3, a high-speed stretching roller 5 on the inner wall of the heating chamber 4, and a low-speed stretching roller 6 near the high-speed stretching roller 5, and further comprising:

[0050] Cleaning mechanism 7: The cleaning mechanism 7 is located inside the heating chamber 4, and there is at least one cleaning mechanism 7. The cleaning mechanism 7 is used to clean the oil stains on the surface of the high-speed stretching roller 5.

[0051] Cooling mechanism 8: The cooling mechanism 8 is located near the longitudinal stretching system 3 and cools down the high-speed stretching roller 5 and the low-speed stretching roller 6;

[0052] Power mechanism 9: The power mechanism 9 is located near the longitudinal tensioning system 3, and the power mechanism 9 provides power to the cleaning mechanism 7 and the cooling mechanism 8.

[0053] This invention includes a control cabinet 1, a rapid cooling roller 2 on one side of the control cabinet 1, a longitudinal stretching system 3 on one side of the rapid cooling roller 2, a heating chamber 4 fixedly connected inside the longitudinal stretching system 3, a high-speed stretching roller 5 rotatably connected to the inner wall of the heating chamber 4, a low-speed stretching roller 6 near the high-speed stretching roller 5, the low-speed stretching roller 6 rotatably connected to the inner wall of the heating chamber 4, a cleaning mechanism 7 inside the heating chamber 4 to clean oil and impurities from the surface of the high-speed stretching roller 5; a cooling mechanism 8 near the longitudinal stretching system 3 to cool the high-speed stretching roller 5 and the low-speed stretching roller 6; and a power mechanism 9 near the longitudinal stretching system 3 to provide power to the cleaning mechanism 7 and the cooling mechanism 8.

[0054] When this invention is in operation, the polypropylene film raw material is melt-extruded in the preceding equipment, then cast into sheets by the casting machine, and then cooled by the quench roller 2. Cooling liquid flows inside the quench roller 2. After cooling, the polypropylene film is stretched by the longitudinal stretching system 3. The longitudinal stretching of the polypropylene film is generated by the speed difference between the high-speed stretching roller 5 and the low-speed stretching roller 6. In order to facilitate stretching during production, the high-speed stretching roller 5 and the low-speed stretching roller 6 are heated by the control cabinet 1. During the stretching process of the polypropylene film, the power mechanism 9 outputs power to the cleaning mechanism 7 and the cooling mechanism 8, so that the cleaning mechanism 7 cleans the surface of the high-speed stretching roller 5, and the cooling mechanism 8 cools the high-speed stretching roller 5 and the low-speed stretching roller 6. After longitudinal stretching, the polypropylene film is cooled by the quench roller 2 and then transferred to the subsequent processing equipment.

[0055] Therefore, compared to existing technologies, when the temperature of the stretching roller is too high, the film is prone to sticking to the roller, which can cause longitudinal film breakage and thus affect the efficiency of film processing.

[0056] This invention sets up a cooling mechanism 8 and a power mechanism 9, so that the power mechanism 9 outputs power to the cooling mechanism 8, which makes the cooling mechanism 8 uniformly cool the surfaces of the high-speed stretching roller 5 and the low-speed stretching roller 6, thereby reducing the stickiness of the polypropylene film and reducing the occurrence of film sticking to the rollers.

[0057] In one specific embodiment of the present invention, the cleaning mechanism 7 includes:

[0058] Cleaning chamber 71: The cleaning chamber 71 is located inside the heating chamber 4, and cotton rope 72 is provided inside the cleaning chamber 71;

[0059] Liquid storage tank 73: The liquid storage tank 73 is located inside the cleaning tank 71, and the liquid storage tank 73 is equipped with a degreasing agent;

[0060] Sponge 74: The sponge 74 is located inside the cleaning chamber 71 and is connected to the cotton rope 72.

[0061] In one specific embodiment of the present invention, the liquid storage tank 73 is provided with a liquid inlet 10 on one side.

[0062] Please see Figure 5 The cleaning mechanism 7 of the present invention includes a cleaning chamber 71, which is located inside the heating chamber 4 and is fixedly connected to a support rod provided inside the heating chamber 4. A liquid storage chamber 73 is fixedly connected inside the cleaning chamber 71. The liquid storage chamber 73 contains a degreasing agent. A sealing plate is provided on the inner wall of the liquid storage chamber 73. The degreasing agent is located below the sealing plate. A sponge 74 is provided above the sealing plate. The sponge 74 is fixedly connected to the inner wall of the cleaning chamber 71, and a part of the sponge 74 is higher than the cleaning chamber 71 and in close contact with the surface of the high-speed stretching roller 5. A round hole is opened in the middle of the sealing plate. A cotton rope 72 passes through the round hole to connect the liquid storage chamber 73 and the sponge 74. The cotton rope 72 and the sponge 74 are fixedly connected. An inlet 10 is opened on one side of the liquid storage chamber 73. When the cleaning mechanism 7 of the present invention is working, degreasing agent is added into the liquid storage tank 73 through the liquid inlet 10. The degreasing agent slowly flows into the sponge 74 through the cotton rope 72. The sponge 74 is in close contact with the surface of the high-speed stretching roller 5. At this time, the cleaning mechanism 7 is moved on the surface of the high-speed stretching roller 5 by the power mechanism 9, so that the sponge 74 wipes back and forth on the surface of the high-speed stretching roller 5 to remove oil stains from the surface of the high-speed stretching roller 5 and reduce the problem of oil stains contaminating the film and reducing the film quality.

[0063] In one specific embodiment of the present invention, the power mechanism 9 includes:

[0064] Motor 91: The motor 91 is located on the outer surface of the heating chamber 4, and a sprocket 92 is provided on the output shaft of the motor 91;

[0065] Chain 93: The chain 93 meshes with the first sprocket 92, and a protrusion 94 is provided on the surface of one link of the chain plate in the chain 93;

[0066] Rotating shaft 95: The rotating shaft 95 is located on the outer surface of the heating chamber 4, and the rotating shaft 95 is fixedly connected to the outer wall of the heating chamber 4;

[0067] Second sprocket 96: The second sprocket 96 meshes with the chain 93, and the second sprocket 96 is rotatably connected to the rotating shaft 95;

[0068] Slider 97: Slider 97 is located on the outer surface of heating chamber 4. Slider 97 has a groove on its surface and connecting rods 98 on both sides.

[0069] Fixed plate 99: One side of the fixed plate 99 is connected to the first connecting rod 98.

[0070] In one specific embodiment of the present invention, a round rod 11 is provided on one side of the cleaning chamber 71, and the other end of the round rod 11 is connected to the fixing plate 99.

[0071] Please see Figure 2 and Figure 3 The power mechanism 9 in this invention includes a motor 91, which is located on and fixedly connected to the outer surface of the heating chamber 4. A first sprocket 92 is fixedly connected to the output shaft of the motor 91, and a chain 93 is engaged with the first sprocket 92. A protrusion 94 is fixedly connected to the surface of one link of the chain 93. A rotating shaft 95 is fixedly connected to the outer surface of the heating chamber 4, and a second sprocket 96 is rotatably connected to the outer surface of the rotating shaft 95. The other end of the chain 93 is engaged with the second sprocket 96. The outer surface of the heating chamber 4... A sliding groove is provided on the side, and the first slider 97 is slidably connected to the sliding groove on the outer surface of the heating chamber 4. At the same time, a sliding groove is also provided on the surface of the first slider 97. The protrusion 94 is slidably connected to the sliding groove on the surface of the first slider 97. A first connecting rod 98 is hinged to both sides of the first slider 97, and the other end of the first connecting rod 98 is hinged to one side of the fixed plate 99. A round rod 11 is fixedly connected to one side of the cleaning chamber 71, and the round rod 11 is slidably connected to the sliding groove on the inner wall of the heating chamber 4. The other end of the round rod 11 is fixedly connected to the fixed plate 99.

[0072] When the power mechanism 9 of this invention is working, the motor 91 is turned on, and the motor 91 drives the first sprocket 92, which is fixedly connected to its output shaft, to rotate. The first sprocket 92 drives the chain 93, which is meshed with it, to move. The movement of the chain 93 also drives the second sprocket 96, which is meshed with it, to rotate on the rotating shaft 95, thereby realizing the transmission of the chain 93. A protrusion 94 is fixedly connected to the outer surface of one link of the chain 93, and a first slider 97 is slidably connected to the outer surface of the heating chamber 4. A groove is opened on the outer surface of the first slider 97, and the protrusion 94 is slidably connected to the groove on the surface of the first slider 97. When the chain 93 is transmitting and moving, the chain plate also moves, and at the same time, it drives the protrusion 94, which is fixedly connected to the chain plate, to move. The protrusion 94 drives the first slider 97, which is slidably connected to it, to move on the outer surface of the heating chamber 4. As the slider 97 moves downwards, a connecting rod 98 is hinged to both sides of the slider 97. The other end of the connecting rod 98 is hinged to the fixed plate 99. When the slider 97 moves up and down, it drives the connecting rod 98 to rotate. The rotation of the connecting rod 98 drives the fixed plate 99 to move left and right. A round rod 11 is fixedly connected to one end of the fixed plate 99. The other end of the round rod 11 is fixedly connected to the cleaning chamber 71 and slidably connected to the heating chamber 4. Therefore, when the fixed plate 99 moves left and right, it drives the round rod 11 to move left and right. At the same time, the round rod 11 drives the cleaning chamber 71 to move, so that the sponge 74 wipes back and forth on the surface of the high-speed stretching roller 5, removing oil stains from the surface of the high-speed stretching roller 5 and reducing the problem of oil stains contaminating the film and reducing film quality.

[0073] In one specific embodiment of the present invention, the cooling mechanism 8 includes:

[0074] Turntable 81: The turntable 81 is fixedly connected to the output shaft of the motor 91, and a second connecting rod 82 is fixedly connected to the outer surface of the turntable 81.

[0075] Baffle 84: The baffle 84 is located inside the heating chamber 4, and the surface of the baffle 84 is provided with a sliding groove;

[0076] Fixed rod 85: The fixed rod 85 is slidably connected to the groove opened on the surface of the baffle 84, and the groove is opened at one end of the fixed rod 85;

[0077] Second slider 83: One side of the second slider 83 is fixedly connected to the second connecting rod 82, and the second slider 83 is slidably connected to the groove opened at one end of the fixed rod 85;

[0078] Gear No. 3 86: Gear No. 3 86 is connected to the outer surface of the fixed rod 85, and a fan 87 is connected to the outer surface of Gear No. 3 86;

[0079] Rack 88: The rack 88 is located on the inner wall of the heating chamber 4, and the rack 88 meshes with the third gear 86.

[0080] In one specific embodiment of the present invention, exhaust holes 12 are provided on the inner walls of both sides of the heating chamber 4.

[0081] The cooling mechanism 8 of this invention includes a turntable 81, which is located inside the heating chamber 4 and away from the high-speed stretching roller 5 and the low-speed stretching roller 6. The turntable 81 is fixedly connected to the outer surface of the output shaft of the motor 91. A second connecting rod 82 is fixedly connected to the outer surface of the turntable 81, and the other end of the second connecting rod 82 is fixedly connected to a second slider 83. A baffle 84 is fixedly connected inside the heating chamber 4. A groove is formed on the surface of the baffle 84. A fixed rod 85 is slidably connected to the groove on the surface of the baffle 84. The second slider 83 is located outside... The surface is connected to the fixed rod 85, and the surface of the fixed rod 85 has a groove. The second slider 83 is slidably connected to the groove on the surface of the fixed rod 85. The outer surface of the fixed rod 85 is rotatably connected to the third gear 86. The outer surface of the third gear 86 is fixedly connected to the fan 87. The fan 87 faces the high-speed stretching roller 5 and the low-speed stretching roller 6. The inner wall of the heating chamber 4 is fixedly connected to the rack 88 near the baffle 84. The third gear 86 meshes with the rack 88. At the same time, exhaust holes 12 are opened on both sides of the inner wall of the heating chamber 4.

[0082] When the cooling mechanism 8 of the present invention is working, the motor 91 rotates, driving the turntable 81 fixedly connected to its output shaft to rotate. The rotation of the turntable 81 drives the second connecting rod 82 fixedly connected to it to rotate. The second connecting rod 82 drives the second slider 83 fixedly connected to it to rotate. Since the second slider 83 is slidably connected to the groove on the surface of the fixed rod 85, when the second slider 83 rotates, it drives the fixed rod 85 to move left and right in the groove on the surface of the baffle 84. When the fixed rod 85 moves, it drives the third gear 86 rotatably connected to it to move. The rack 88 is fixedly connected to the inner wall of the heating chamber 4. When the third gear 86 moves left and right on the rack 88, the third gear 86 drives the fan 87 fixedly connected to it to rotate. Since the fan 87 is facing the low-speed stretching roller 6 of the high-speed stretching roller 5 and the inner walls on both sides of the heating chamber 4 are provided with exhaust holes 12, the rotation of the fan 87 drives the flow of gas, promotes the exchange of indoor gas with outdoor gas through the exhaust holes, thereby achieving the purpose of cooling the surface of the low-speed stretching roller 6 of the high-speed stretching roller 5, and ultimately reducing the problem of polypropylene film sticking to the roller.

[0083] In one specific embodiment of the present invention, the inner wall of the heating chamber 4 is provided with an air outlet pipe 13, and an air outlet 14 is opened on the surface of the air outlet pipe 13, with the air outlet 14 facing the high-speed stretching roller 5 and the low-speed stretching roller 6.

[0084] In one specific embodiment of the present invention, one end of the air outlet pipe 13 is connected to the fixing plate 99, and one side of the air outlet pipe 13 is connected to the air inlet hose 15.

[0085] In one specific embodiment of the present invention, one end of the air intake hose 15 is connected to a cooler 16.

[0086] In this invention, the inner wall of the heating chamber 4 is provided with an air outlet pipe 13. The number of air outlet pipes 13 is at least one. The air outlet pipe 13 is slidably connected to the inner wall of the heating chamber 4. An air outlet 14 is opened on the surface of the air outlet pipe 13. The air outlet 14 faces the high-speed stretching roller 5 and the low-speed stretching roller 6. In addition, one end of the air outlet pipe 13 is fixedly connected to the fixing plate 99, and an air inlet hose 15 is fixedly connected to one side of the air outlet pipe 13. A cold air fan 16 is fixedly connected to one side of the air inlet hose 15. When the present invention is in operation, the power mechanism 9 causes the fixed plate 99 to move left and right. Since the air outlet pipe 13 is fixedly connected to the fixed plate 99 and slidably connected to the inner wall of the heating chamber 4, the left and right movement of the fixed plate 99 causes the air outlet pipe 13 to slide left and right on the inner wall of the heating chamber 4. At the same time, the refrigeration separator is turned on. The air outlet of the refrigeration separator is fixedly connected to the air inlet hose 15. The other end of the air inlet hose 15 is fixedly connected to the air outlet pipe 13. The air outlet 14 at the end of the air outlet pipe 13 faces the high-speed stretching roller 5 and the low-speed stretching roller 6. The air outlet pipe 13 in the heating chamber 4... When the air moves left and right, the cold air enters the air outlet pipe 13 through the air inlet hose 15, and then sprays out from the air outlet 14 toward the high-speed stretching roller 5 and the low-speed stretching roller 6 to cool the surface of the high-speed stretching roller 5 and the low-speed stretching roller 6, further improving the problem of polypropylene film sticking to the rollers during longitudinal stretching. At the same time, the left and right movement of the air outlet pipe 13 can uniformly cool the surface of the high-speed stretching roller 5 and the low-speed stretching roller 6, preventing the surface temperature difference between the high-speed stretching roller 5 and the low-speed stretching roller 6 from being too large, which would cause the polypropylene film to curl up on both sides due to the temperature difference.

[0087] The specific workflow is as follows:

[0088] This invention includes a control cabinet 1, a rapid cooling roller 2 on one side of the control cabinet 1, a longitudinal stretching system 3 on one side of the rapid cooling roller 2, a heating chamber 4 fixedly connected inside the longitudinal stretching system 3, a high-speed stretching roller 5 rotatably connected to the inner wall of the heating chamber 4, a low-speed stretching roller 6 near the high-speed stretching roller 5, the low-speed stretching roller 6 rotatably connected to the inner wall of the heating chamber 4, a cleaning mechanism 7 inside the heating chamber 4 to clean oil and impurities from the surface of the high-speed stretching roller 5; a cooling mechanism 8 near the longitudinal stretching system 3 to cool the high-speed stretching roller 5 and the low-speed stretching roller 6; and a power mechanism 9 near the longitudinal stretching system 3 to provide power to the cleaning mechanism 7 and the cooling mechanism 8.

[0089] When this invention is in operation, the polypropylene film raw material is melt-extruded in the preceding equipment, then cast into sheets by the casting machine, and then cooled by the quench roller 2. Cooling liquid flows inside the quench roller 2. After cooling, the polypropylene film is stretched by the longitudinal stretching system 3. The longitudinal stretching of the polypropylene film is generated by the speed difference between the high-speed stretching roller 5 and the low-speed stretching roller 6. In order to facilitate stretching during production, the high-speed stretching roller 5 and the low-speed stretching roller 6 are heated by the control cabinet 1. During the stretching process of the polypropylene film, the power mechanism 9 outputs power to the cleaning mechanism 7 and the cooling mechanism 8, so that the cleaning mechanism 7 cleans the surface of the high-speed stretching roller 5, and the cooling mechanism 8 cools the high-speed stretching roller 5 and the low-speed stretching roller 6. After longitudinal stretching, the polypropylene film is cooled by the quench roller 2 and then transferred to the subsequent processing equipment.

[0090] Therefore, compared to existing technologies, when the temperature of the stretching roller is too high, the film is prone to sticking to the roller, which can cause longitudinal film breakage and thus affect the efficiency of film processing.

[0091] Please see Figure 5 The cleaning mechanism 7 of the present invention includes a cleaning chamber 71, which is located inside the heating chamber 4 and is fixedly connected to a support rod provided inside the heating chamber 4. A liquid storage chamber 73 is fixedly connected inside the cleaning chamber 71. The liquid storage chamber 73 contains a degreasing agent. A sealing plate is provided on the inner wall of the liquid storage chamber 73. The degreasing agent is located below the sealing plate. A sponge 74 is provided above the sealing plate. The sponge 74 is fixedly connected to the inner wall of the cleaning chamber 71, and a part of the sponge 74 is higher than the cleaning chamber 71 and in close contact with the surface of the high-speed stretching roller 5. A round hole is opened in the middle of the sealing plate. A cotton rope 72 passes through the round hole to connect the liquid storage chamber 73 and the sponge 74. The cotton rope 72 and the sponge 74 are fixedly connected. An inlet 10 is opened on one side of the liquid storage chamber 73. When the cleaning mechanism 7 of the present invention is working, degreasing agent is added into the liquid storage tank 73 through the liquid inlet 10. The degreasing agent slowly flows into the sponge 74 through the cotton rope 72. The sponge 74 is in close contact with the surface of the high-speed stretching roller 5. At this time, the cleaning mechanism 7 is moved on the surface of the high-speed stretching roller 5 by the power mechanism 9, so that the sponge 74 wipes back and forth on the surface of the high-speed stretching roller 5 to remove oil stains from the surface of the high-speed stretching roller 5 and reduce the problem of oil stains contaminating the film and reducing the film quality.

[0092] Please see Figure 2 and Figure 3The power mechanism 9 in this invention includes a motor 91, which is located on and fixedly connected to the outer surface of the heating chamber 4. A first sprocket 92 is fixedly connected to the output shaft of the motor 91, and a chain 93 is engaged with the first sprocket 92. A protrusion 94 is fixedly connected to the surface of one link of the chain 93. A rotating shaft 95 is fixedly connected to the outer surface of the heating chamber 4, and a second sprocket 96 is rotatably connected to the outer surface of the rotating shaft 95. The other end of the chain 93 is engaged with the second sprocket 96. The outer surface of the heating chamber 4... A sliding groove is provided on the side, and the first slider 97 is slidably connected to the sliding groove on the outer surface of the heating chamber 4. At the same time, a sliding groove is also provided on the surface of the first slider 97. The protrusion 94 is slidably connected to the sliding groove on the surface of the first slider 97. A first connecting rod 98 is hinged to both sides of the first slider 97, and the other end of the first connecting rod 98 is hinged to one side of the fixed plate 99. A round rod 11 is fixedly connected to one side of the cleaning chamber 71, and the round rod 11 is slidably connected to the sliding groove on the inner wall of the heating chamber 4. The other end of the round rod 11 is fixedly connected to the fixed plate 99.

[0093] When the power mechanism 9 of this invention is working, the motor 91 is turned on, and the motor 91 drives the first sprocket 92, which is fixedly connected to its output shaft, to rotate. The first sprocket 92 drives the chain 93, which is meshed with it, to move. The movement of the chain 93 also drives the second sprocket 96, which is meshed with it, to rotate on the rotating shaft 95, thereby realizing the transmission of the chain 93. A protrusion 94 is fixedly connected to the outer surface of one link of the chain 93, and a first slider 97 is slidably connected to the outer surface of the heating chamber 4. A groove is opened on the outer surface of the first slider 97, and the protrusion 94 is slidably connected to the groove on the surface of the first slider 97. When the chain 93 is transmitting and moving, the chain plate also moves, and at the same time, it drives the protrusion 94, which is fixedly connected to the chain plate, to move. The protrusion 94 drives the first slider 97, which is slidably connected to it, to move on the outer surface of the heating chamber 4. As the slider 97 moves downwards, a connecting rod 98 is hinged to both sides of the slider 97. The other end of the connecting rod 98 is hinged to the fixed plate 99. When the slider 97 moves up and down, it drives the connecting rod 98 to rotate. The rotation of the connecting rod 98 drives the fixed plate 99 to move left and right. A round rod 11 is fixedly connected to one end of the fixed plate 99. The other end of the round rod 11 is fixedly connected to the cleaning chamber 71 and slidably connected to the heating chamber 4. Therefore, when the fixed plate 99 moves left and right, it drives the round rod 11 to move left and right. At the same time, the round rod 11 drives the cleaning chamber 71 to move, so that the sponge 74 wipes back and forth on the surface of the high-speed stretching roller 5, removing oil stains from the surface of the high-speed stretching roller 5 and reducing the problem of oil stains contaminating the film and reducing film quality.

[0094] The cooling mechanism 8 of this invention includes a turntable 81, which is located inside the heating chamber 4 and away from the high-speed stretching roller 5 and the low-speed stretching roller 6. The turntable 81 is fixedly connected to the outer surface of the output shaft of the motor 91. A second connecting rod 82 is fixedly connected to the outer surface of the turntable 81, and the other end of the second connecting rod 82 is fixedly connected to a second slider 83. A baffle 84 is fixedly connected inside the heating chamber 4. A groove is formed on the surface of the baffle 84. A fixed rod 85 is slidably connected to the groove on the surface of the baffle 84. The second slider 83 is located outside... The surface is connected to the fixed rod 85, and the surface of the fixed rod 85 has a groove. The second slider 83 is slidably connected to the groove on the surface of the fixed rod 85. The outer surface of the fixed rod 85 is rotatably connected to the third gear 86. The outer surface of the third gear 86 is fixedly connected to the fan 87. The fan 87 faces the high-speed stretching roller 5 and the low-speed stretching roller 6. The inner wall of the heating chamber 4 is fixedly connected to the rack 88 near the baffle 84. The third gear 86 meshes with the rack 88. At the same time, exhaust holes 12 are opened on both sides of the inner wall of the heating chamber 4.

[0095] When the cooling mechanism 8 of the present invention is working, the motor 91 rotates, driving the turntable 81 fixedly connected to its output shaft to rotate. The rotation of the turntable 81 drives the second connecting rod 82 fixedly connected to it to rotate. The second connecting rod 82 drives the second slider 83 fixedly connected to it to rotate. Since the second slider 83 is slidably connected to the groove on the surface of the fixed rod 85, when the second slider 83 rotates, it drives the fixed rod 85 to move left and right in the groove on the surface of the baffle 84. When the fixed rod 85 moves, it drives the third gear 86 rotatably connected to it to move. The rack 88 is fixedly connected to the inner wall of the heating chamber 4. When the third gear 86 moves left and right on the rack 88, the third gear 86 drives the fan 87 fixedly connected to it to rotate. Since the fan 87 is facing the low-speed stretching roller 6 of the high-speed stretching roller 5 and the inner walls on both sides of the heating chamber 4 are provided with exhaust holes 12, the rotation of the fan 87 drives the flow of gas, promotes the exchange of indoor gas with outdoor gas through the exhaust holes, thereby achieving the purpose of cooling the surface of the low-speed stretching roller 6 of the high-speed stretching roller 5, and ultimately reducing the problem of polypropylene film sticking to the roller.

[0096] In this invention, the inner wall of the heating chamber 4 is provided with an air outlet pipe 13. The number of air outlet pipes 13 is at least one. The air outlet pipe 13 is slidably connected to the inner wall of the heating chamber 4. An air outlet 14 is opened on the surface of the air outlet pipe 13. The air outlet 14 faces the high-speed stretching roller 5 and the low-speed stretching roller 6. In addition, one end of the air outlet pipe 13 is fixedly connected to the fixing plate 99, and an air inlet hose 15 is fixedly connected to one side of the air outlet pipe 13. A cold air fan 16 is fixedly connected to one side of the air inlet hose 15. When the present invention is in operation, the power mechanism 9 causes the fixed plate 99 to move left and right. Since the air outlet pipe 13 is fixedly connected to the fixed plate 99 and slidably connected to the inner wall of the heating chamber 4, the left and right movement of the fixed plate 99 causes the air outlet pipe 13 to slide left and right on the inner wall of the heating chamber 4. At the same time, the refrigeration separator is turned on. The air outlet of the refrigeration separator is fixedly connected to the air inlet hose 15. The other end of the air inlet hose 15 is fixedly connected to the air outlet pipe 13. The air outlet 14 at the end of the air outlet pipe 13 faces the high-speed stretching roller 5 and the low-speed stretching roller 6. The air outlet pipe 13 in the heating chamber 4... When the air moves left and right, the cold air enters the air outlet pipe 13 through the air inlet hose 15, and then sprays out from the air outlet 14 toward the high-speed stretching roller 5 and the low-speed stretching roller 6 to cool the surface of the high-speed stretching roller 5 and the low-speed stretching roller 6, further improving the problem of polypropylene film sticking to the rollers during longitudinal stretching. At the same time, the left and right movement of the air outlet pipe 13 can uniformly cool the surface of the high-speed stretching roller 5 and the low-speed stretching roller 6, preventing the surface temperature difference between the high-speed stretching roller 5 and the low-speed stretching roller 6 from being too large, which would cause the polypropylene film to curl up on both sides due to the temperature difference.

[0097] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polypropylene biaxially oriented film production line, comprising a control cabinet (1), a chill roller (2) being provided on one side of the control cabinet (1), a longitudinal stretching system (3) being provided on one side of the chill roller (2), a heating chamber (4) being provided inside the longitudinal stretching system (3), a high-speed stretching roller (5) being provided on the inner wall of the heating chamber (4), and a low-speed stretching roller (6) being provided near the high-speed stretching roller (5), characterized in that Also includes: A cleaning mechanism (7): the cleaning mechanism (7) is located inside the heating chamber (4), the number of the cleaning mechanism (7) is at least one, and the cleaning mechanism (7) is used to clean the oil stains on the surface of the high-speed stretching roller (5); a cooling mechanism (8): the cooling mechanism (8) is close to the longitudinal stretching system (3) and cools the high-speed stretching roller (5) and the low-speed stretching roller (6); a power mechanism (9): the power mechanism (9) is close to the longitudinal stretching system (3) and provides power for the cleaning mechanism (7) and the cooling mechanism (8); The power mechanism (9) comprises: a motor (91): the motor (91) is located on the outer surface of the heating chamber (4), and a first sprocket (92) is provided on the output shaft of the motor (91); a chain (93): the chain (93) is meshed with the first sprocket (92), and a protrusion (94) is provided on the surface of a chain plate in the chain (93); a rotating shaft (95): the rotating shaft (95) is located on the outer surface of the heating chamber (4), and the rotating shaft (95) is connected to the heating chamber (4). The outer wall is fixedly connected; a No. 2 sprocket (96): the No. 2 sprocket (96) is meshed with the chain (93), and the No. 2 sprocket (96) is rotatably connected to the rotating shaft (95); a No. 1 slider (97): the No. 1 slider (97) is located on the outer surface of the heating chamber (4), a sliding groove is provided on the surface of the No. 1 slider (97), and No. 1 connecting rods (98) are provided on both sides of the No. 1 slider (97); a fixed plate (99): one side of the fixed plate (99) is connected to the No. 1 connecting rod (98); The cleaning mechanism (7) comprises: a cleaning chamber (71): the cleaning chamber (71) is located inside the heating chamber (4), and a cotton rope (72) is provided inside the cleaning chamber (71); a liquid storage chamber (73): the liquid storage chamber (73) is located inside the cleaning chamber (71), and a degreasing agent is provided inside the liquid storage chamber (73); a sponge (74): the sponge (74) is located inside the cleaning chamber (71), and the sponge (74) is connected to the cotton rope (72); a liquid inlet (10) is provided on one side of the liquid storage chamber (73); a round rod (11) is provided on one side of the cleaning chamber (71), and the other end of the round rod (11) is connected to a fixing plate (99); The cooling mechanism (8) comprises: a rotating disk (81): the rotating disk (81) is fixedly connected to the output shaft of the motor (91), and a second connecting rod (82) is fixedly connected to the outer surface of the rotating disk (81); a baffle (84): the baffle (84) is located inside the heating chamber (4), and a sliding groove is provided on the surface of the baffle (84); a fixed rod (85): the fixed rod (85) is slidably connected to the sliding groove provided on the surface of the baffle (84), and a sliding groove is provided at one end of the fixed rod (85); the second sliding Block (83): one side of the second slider (83) is fixedly connected to the second connecting rod (82), and the second slider (83) is slidably connected to a slide groove provided at one end of the fixed rod (85); a third gear (86): the third gear (86) is connected to the outer surface of the fixed rod (85), and the outer surface of the third gear (86) is connected to a fan (87); a rack (88): the rack (88) is located inside the heating chamber (4), and the rack (88) is meshed with the third gear (86); Exhaust holes (12) are provided on the inner walls on both sides of the heating chamber (4); an air outlet pipe (13) is provided on the inner wall of the heating chamber (4); an air outlet port (14) is provided on the surface of the air outlet pipe (13); the air outlet port (14) faces the high-speed stretching roller (5) and the low-speed stretching roller (6); one end of the air outlet pipe (13) is connected to a fixed plate (99), and one side of the air outlet pipe (13) is connected to an air intake hose (15); one end of the air intake hose (15) is connected to a cooling fan (16).

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