Plastic recycling calendering film forming equipment for producing flange barrels

Abstract

This invention discloses a plastic recycling calendering film forming equipment for flange barrel production, relating to the field of waste plastic recycling technology. The proposed solution includes a base, a mounting frame mounted on the base, a controller mounted on the mounting frame, an extruder one, a receiving box, and an extruder two mounted on the mounting frame, an inner liner connected to the mounting frame, a main pressure roller shell rotatably connected to the outside of the inner liner, a perforated plate slidably connected inside the receiving box, water pipes communicating with the interior installed at both ends of the inner liner, and a heating pipe installed at the top inside the inner liner. This invention uses the extruder one to initially melt and mix the mixed plastic and compatibilizer, and the extruder two to perform secondary plasticizing and homogenization, improving the uniformity of melt composition and consistent fluidity, thus increasing film quality. The perforated plate reciprocates below the melt surface, reducing residual air bubbles inside the melt. A vertical temperature gradient is formed by hot water floating and cold water sinking, avoiding sudden cooling internal stress, resulting in uniform film thickness, a smooth surface, and improved mechanical properties.

Description

Technical Field

[0001] This invention relates to the field of waste plastic recycling technology, and in particular to a plastic recycling calendering and film forming equipment for flange barrel production. Background Technology

[0002] Plastics are widely used in various fields due to their lightweight, durability, and low cost. However, a large amount of waste plastics are difficult to degrade naturally and easily decompose into microplastics, causing continuous harm to soil, water sources, and biological health. Recycling is an important direction for dealing with waste plastics. Among them, film plastics are in high demand in packaging, agriculture, construction, medical and other fields. In the existing recycling technology, waste plastics are melted and calendered into films using an extruder.

[0003] However, in practical applications, traditional methods for melting and calendering waste plastics into films still have some problems: 1. In the process of recycling, melting, calendering and film forming of plastic products such as waste flange barrels, scraps, and lids, the recycling sources are complex and the types of plastics processed are often mixed. The melting characteristics and compatibility of different components are different. Relying solely on a single extruder to complete the melting and direct spraying makes it difficult to achieve sufficient and uniform mixing of the multiphase polymer system in a short time, which has an adverse effect on the compositional consistency and mechanical properties of the subsequent calendered film. 2. When waste plastics are in a high-temperature molten state, a certain amount of bubbles will be generated due to pyrolysis and mechanical entrainment. Due to the poor compatibility between different plastics, the bubble interface is stable and it is difficult to merge and escape effectively, resulting in a large number of bubbles remaining in the melt. If they cannot be discharged in time, they will form defects such as pinholes and local porosity after film formation, reducing the density and reliability of the film. 3. In the calendering process, traditional processes typically set a fixed extrusion temperature and rely on pressure rollers to cool and shape the preform. However, they do not finely control the temperature distribution along the pressure roller surface. If the overall temperature of the pressure roller is too low, the rapid cooling of the melt can easily cause internal stress concentration and film cracking. Conversely, if the temperature is too high, it may cause difficulties in demolding or film adhesion. Therefore, the control accuracy and gradient distribution of the pressure roller temperature have a critical impact on film quality, and there is still room for improvement in this aspect of the existing technology. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a plastic recycling calendering film forming equipment for flange barrel production that enables multiple extruders to work together, facilitates bubble discharge, and allows for adjustable roller surface temperature.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A plastic recycling calendering and film forming equipment for flange barrel production includes a base, a mounting frame mounted on the base, a controller mounted on the mounting frame, an extruder one, a receiving box, and an extruder two mounted on the mounting frame. The extrusion end of the extruder one is mounted on the side wall of the receiving box, the feed end of the extruder two is connected to the bottom end of the receiving box, and a trapezoidal die head is mounted on the extrusion end of the extruder two. An inner liner is connected to the mounting frame, and a coaxial main pressure roller shell is rotatably connected to the outside of the inner liner. An auxiliary roller is connected to the mounting frame, and a second drive mechanism for driving the main pressure roller shell and the auxiliary roller to rotate is connected to the mounting frame. A perforated plate is slidably connected inside the housing, and a one-way plate is rotatably connected to the bottom end of the perforated plate. A drive mechanism for driving the perforated plate to move is connected to the mounting frame. Both ends of the inner liner are equipped with water pipes that communicate with the interior, and a heating pipe is installed at the top inside the inner liner.

[0006] Preferably, the mounting frame is connected to a connecting mechanism, the connecting mechanism including an inner support, and a pair of inner supports are installed on the mounting frame, the pair of inner supports being fixedly connected to both ends of the inner liner respectively.

[0007] Preferably, an outer support is installed on the mounting frame, a cover plate is installed at both ends of the main pressure roller shell, both ends of the inner liner are axial, the cover plate is rotatably connected to the axial end of the inner liner, a shaft seal is installed between the cover plate and the axial end of the inner liner, and the two cover plates are respectively rotatably connected to both ends of the outer support.

[0008] Preferably, the second drive mechanism includes a second motor, the second motor is mounted on the outer bracket, a fifth gear is keyed to the output shaft of the second motor, a third gear is keyed to one of the cover plates, the fifth gear meshes with the third gear, and a fourth gear is keyed to the shaft end of the auxiliary roller, the fourth gear meshes with the third gear.

[0009] Preferably, the outer wall of the inner liner is equipped with multiple staggered support bars, the inner wall of the main pressure roller shell is slidably connected to the support bars, the space between the inner liner and the main pressure roller shell is filled with heat-conducting oil, multiple temperature sensors are installed on the outer wall of the inner liner, and a pressure pipe is installed on the top of the inner liner.

[0010] Preferably, an adjustment mechanism is connected between the mounting frame and the auxiliary roller. The adjustment mechanism includes a mounting block, on which the mounting frame is mounted. A pair of slide rods are fixedly connected to the mounting block. A slide bar is slidably connected between the pair of slide rods. Two pairs of slide rods are slidably connected to the slide bar. The ends of the two pairs of slide rods are fixedly connected to the same mounting frame. The auxiliary roller is rotatably connected to the mounting frame. A connecting plate is rotatably connected between the auxiliary roller and the cover plate. A motor is mounted on the mounting block. The output shaft of the motor is connected to a lead screw via a coupling. A slider is mounted on the slide bar. The lead screw and the slider are threadedly connected.

[0011] Preferably, the drive mechanism includes a housing, which is mounted on the mounting frame. A crankshaft is rotatably connected inside the housing. One end of the crankshaft extends outside the housing and is keyed to a gear. A motor is mounted on the mounting frame. A gear is keyed to the output shaft of the motor and meshes with the gear. A pair of fixing rods are mounted on the top of the perforated plate. The fixing rods are slidably connected to the mounting frame. The top ends of the pair of fixing rods are fixedly connected to the same end block. A connecting rod is rotatably connected between the end block and the crankshaft.

[0012] Preferably, the perforated plates are provided in pairs, and the pair of perforated plates are arranged in a staggered manner.

[0013] Preferably, a heater is installed on the outer wall of the container, a level gauge is installed inside the container, an electric gear pump is installed at the bottom of the container, the output end of the electric gear pump is installed on the feed end of the extruder, and an air extraction pipe is installed at the top of the container.

[0014] Preferably, a guide roller is installed on the mounting frame, and the guide roller is located on the side of the main pressure roller shell away from the auxiliary roller.

[0015] Compared with the prior art, the present invention provides a plastic recycling calendering film forming device for flange barrel production, which has the following beneficial effects: 1. This plastic recycling calendering film forming equipment for flange barrel production uses an extruder 1 to initially melt and mix the mixed plastics and compatibilizer, and an extruder 2 to perform secondary plasticizing and homogenization. The two stages connected in series ensure that the multi-component plastics are fully melted and compatible, avoiding unmelted particles or degradation. The melt composition is uniform and the fluidity is consistent. After being extruded through a trapezoidal die, it is calendered between the main pressure roller shell and the auxiliary roller, reducing crystal points and streaks, and significantly improving tensile strength and elongation at break.

[0016] 2. The plastic recycling calendering film forming equipment used in the production of flange barrels has a perforated plate that reciprocates below the surface of the melt. When pressed down, the one-way plate closes, compressing the melt and causing small bubbles to coalesce. When lifted up, the one-way plate opens, and negative pressure suction removes large bubbles. The staggered movement of the double perforated plates generates a kneading effect. Combined with the vacuum environment, this reduces bubble residue, eliminates pinholes and holes from the source, and improves film density.

[0017] 3. The plastic recycling calendering film forming equipment used in the production of flange barrels has a static inner tank. Hot water floats and cold water sinks, forming a vertical temperature gradient. This gradient is transferred to the rotating main pressure roller shell via heat transfer oil. The roller surface temperature has an axial gradient, with higher temperature at the top and lower temperature at the bottom. The film preform is first fully filled in the high-temperature zone, then slowly cooled in the medium-temperature zone to release internal stress, and finally shaped and demolded in the low-temperature zone. This avoids internal stress caused by sudden cooling, resulting in uniform film thickness, a smooth surface, and increased mechanical properties. Attached Figure Description

[0018] Figure 1 This is a perspective view of a plastic recycling calendering and film forming equipment for flange barrel production proposed in this invention; Figure 2 This is a view of the mounting frame connection structure of the present invention; Figure 3 This is a view of the housing connection structure of the present invention; Figure 4 This is a view of the electric gear pump connection structure of the present invention; Figure 5 This is a view of the crankshaft connection structure of the present invention; Figure 6 This is a view of the one-way plate connection structure of the present invention; Figure 7 This is a view of the main pressure roller shell connection structure of the present invention; Figure 8 This is a view of the inner liner connection structure of the present invention; Figure 9 This is a view of the connecting plate structure of the present invention; Figure 10 This is a view of the cover plate connection structure of the present invention; Figure 11 This is a view of the heating tube connection structure of the present invention; Figure 12 This is a view of the support strip connection structure of the present invention.

[0019] In the diagram: 1. Base; 2. Mounting frame; 3. Controller; 4. Extruder 1; 5. Extruder 2; 6. Trapezoidal die head; 7. Drive mechanism 1; 71. Motor 1; 72. Housing; 73. Gear 1; 74. Suction pipe; 75. Gear 2; 76. End block; 77. Fixing rod; 78. Crankshaft; 79. Connecting rod; 8. Housing box; 9. Heater; 10. Guide roller; 11. Main pressure roller housing; 12. Drive mechanism 2; 121. Gear 3; 122. Motor 2; 123. Gear 4; 124. Gear 5; 13. Adjustment mechanism; 131. Slide bar 1; 132. Slide bar 2; 133. Slide bar; 134. Motor 3; 135. Slider; 136. Lead screw; 137. Mounting block; 138. Mounting bracket; 139. Connecting plate; 14. Auxiliary roller; 15. Inner liner; 16. Electric gear pump; 17. Connecting mechanism; 171. Inner support; 172. Outer support; 173. Shaft seal; 174. Cover plate; 18. Orifice plate; 19. One-way plate; 20. Level gauge; 21. Pressurization pipe; 22. Water pipe; 23. Heating pipe; 24. Temperature sensor; 25. Support bar. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Example 1: Refer to Figures 1-12A plastic recycling calendering and film forming device for flange barrel production includes a base 1, on which a mounting frame 2 is fixedly installed. The mounting frame 2 is a multi-layer steel structure frame, and a controller 3 is installed on the mounting frame 2. The controller 3 is a PLC programmable controller (model: Siemens S7-1200). A receiving box 8 is installed in the middle of the mounting frame 2, and an extruder 4 is installed on the mounting frame 2. The extruder 4 is a single-screw extruder, and its extrusion end is installed on the upper side wall of the receiving box 8 through a flange. A mixture of waste plastic particles and compatibilizer is melted by the extruder 4 and fed into the receiving box 8, where exhaust is vented. An electric gear pump 16 is installed at the bottom of the receiving box 8, and the output end of the electric gear pump 16 is installed on the feed end of the extruder 5. A connecting pipe is installed at the bottom of the receiving box 8, connecting to the electric gear pump 16. The gear pump 16, an electric gear pump, transports the vented melt to the subsequent extruder 5. The extruder 5 is a single-screw extruder. A trapezoidal die 6 is installed at the extrusion end of the extruder 5. The discharge port of the trapezoidal die 6 is flat. An inner liner 15 is connected to the mounting frame 2. A coaxial main pressure roller shell 11 is rotatably connected to the outside of the inner liner 15. The sheet-like plastic film preform (temperature about 200°C) extruded by the trapezoidal die 6 is attached to the upper part of the main pressure roller shell 11. A drive mechanism 12 is connected to the mounting frame 2 to drive the main pressure roller shell 11 and the auxiliary roller 14 to rotate. The drive mechanism 12 controls the rotation of the main pressure roller shell 11 and the auxiliary roller 14 through the controller 3. The film preform moves downward with the rotation of the main pressure roller shell 11. The auxiliary roller 14 is connected to the mounting frame 2. The main pressure roller shell 11 and the auxiliary roller 14 cooperate to complete the final calendering and demold smoothly.

[0023] In this invention, a connecting mechanism 17 is connected to the mounting frame 2. The connecting mechanism 17 includes an inner support 171. A pair of inner supports 171 are installed on the mounting frame 2. The pair of inner supports 171 are fixedly connected to both ends of the inner liner 15, and the inner liner 15 is supported and fixed by the pair of inner supports 171.

[0024] In this invention, an outer support 172 is installed on the mounting frame 2, and cover plates 174 are installed at both ends of the main pressure roller shell 11. Both ends of the inner liner 15 are axial. The cover plates 174 are rotatably connected to the axial ends of the inner liner 15. The two cover plates 174 are rotatably connected to both ends of the outer support 172 respectively. The main pressure roller shell 11 is supported by the outer support 172 and the cover plates 174.

[0025] In this invention, a drive mechanism 2 12 is installed on the mounting frame 2. The drive mechanism 2 12 includes a motor 2 122 (servo motor) installed on the outer bracket 172. A gear 5 124 is keyed to the output shaft of the motor 2 122. A coaxial gear 3 121 is keyed to one of the cover plates 174. The gear 5 124 meshes with the gear 3 121. A gear 4 123 is keyed to the shaft end of the auxiliary roller 14. The gear 4 123 meshes with the gear 3 121. When the motor 2 122 rotates, the gear 5 124 drives the gear 3 121 to rotate. The gear 3 121 drives the cover plate 174 of the main pressure roller shell 11 and the main pressure roller shell 11 to rotate. At the same time, the gear 3 121 drives the auxiliary roller 14 to rotate in the opposite direction through the gear 4 123, so as to realize the synchronous reverse rotation of the main pressure roller shell 11 and the auxiliary roller 14, thereby calendering the plastic mold between the main pressure roller shell 11 and the auxiliary roller 14.

[0026] In this invention, an adjustment mechanism 13 is connected between the mounting frame 2 and the auxiliary roller 14. The adjustment mechanism 13 includes a mounting block 137, which is fixedly mounted on the mounting frame 2. A pair of sliding rods 131 are fixedly connected to the mounting block 137. A sliding strip 133 is slidably connected between the pair of sliding rods 131. Two pairs of sliding rods 132 are slidably connected to the sliding strip 133. The ends of the two pairs of sliding rods 132 are fixedly connected to the same mounting frame 138. The auxiliary roller 14 is rotatably connected to the mounting frame 138. A connecting plate 139 is rotatably connected between the auxiliary roller 14 and the cover plate 174 of the main pressure roller shell 11 to hold the auxiliary roller 14. 4. The relative angle with the main pressure roller shell 11. A motor 3 134 (servo motor) is installed on the mounting block 137. The output shaft of the motor 3 134 is connected to the lead screw 136 through a coupling. A slider 135 is installed on the slide bar 133. The lead screw 136 and the slider 135 are threadedly connected. When it is necessary to adjust the calendering position, the controller 3 issues a command, the motor 3 134 rotates, the lead screw 136 drives the slider 135 to move, and drives the slide bar 133 to slide along the slide bar 131. Then, through the slide bar 2 132 and the mounting bracket 138, the auxiliary roller 14 is driven to move up or down, and the connecting plate 139 rotates, thereby adjusting the calendering position.

[0027] In this invention, a guide roller 10 is installed on the mounting frame 2. The guide roller 10 is located on the side of the main pressure roller shell 11 away from the auxiliary roller 14. The guide roller 10 is a stainless steel smooth roller with a polished surface, used to guide the calendered plastic film into the subsequent cooling box and winding device.

[0028] Example 2: Based on Example 1, a plastic recycling calendering film forming device for flange barrel production includes a perforated plate 18 slidably connected inside a receiving box 8. A one-way plate 19 is rotatably connected to the bottom end of the perforated plate 18. A drive mechanism 7 for driving the movement of the perforated plate 18 is connected to a mounting frame 2. The perforated plate 18 is adapted to the interior of the receiving box 8, and its surface is mirror-polished. The perforated plate 18 has circular through holes with an opening rate of 45%. The bottom end of the perforated plate 18 is rotatably connected to the one-way plate 19 via a micro-hinge. The rotation angle of the one-way plate 19 is less than 80 degrees, and its surface is coated with Teflon. The layer opens downwards. When the drive mechanism 7 pushes the orifice plate 18 downwards, the molten plastic below the orifice plate 18 is compressed, and the melt pressure increases. This pressure acts on the lower surface of the one-way plate 19, generating an upward thrust that presses the one-way plate 19 tightly against the bottom surface of the orifice plate 18, keeping the through hole completely closed. At this time, the orifice plate 18 is equivalent to a quasi-sealed piston. Because the through hole is closed, the melt below the orifice plate 18 cannot escape upwards through the orifice plate 18 and can only be forcibly compressed and flow to the sides and downwards. During this process, the micro-particles dispersed in the melt... Small bubbles are compressed, their volume decreases, and the internal pressure of the bubbles increases. This repeated change in bubble volume disrupts the adhesion interface between the bubbles and the melt. Simultaneously, adjacent small bubbles move closer together and merge under the pressure, forming larger bubbles (the "coalescing" effect). When the drive mechanism 7 moves the orifice plate 18 upwards, the space below the orifice plate 18 expands instantaneously, creating a negative pressure zone (similar to the suction principle of a syringe). At the same time, the coalesced large bubbles move upwards under buoyancy. At this point, the pressure of the melt below the orifice plate 18 decreases, and a suction device is installed at the top of the receiving box 8. The gas pipe 74 is used, while the area above the orifice plate 18 is a vacuum environment (the gas extraction pipe 74 continuously pumps a vacuum, maintaining a negative pressure of -0.09MPa). Under the combined action of the negative pressure suction below and the vacuum suction above, the one-way plate 19 is subjected to a downward pressure differential force (or can be understood as an upward suction force), which overcomes its own gravity and flips downward to open, forming a gas escape channel. The large bubbles that have coalesced pass upward through the through holes of the orifice plate 18 and enter the gas space above the orifice plate 18 through the opening channel of the one-way plate 19. Finally, they are pumped away by the gas extraction pipe 74, thereby improving the efficiency of air removal from the inside of the melt.

[0029] In this invention, the drive mechanism 7 includes a housing 72, which is mounted on a mounting frame 2. A crankshaft 78 is rotatably connected inside the housing 72. One end of the crankshaft 78 extends out of the housing 72 and is keyed to a gear 73. A motor 71 (servo motor) is mounted on the mounting frame 2. A gear 75 is keyed to the output shaft of the motor 71, and the gear 75 meshes with the gear 73. A pair of fixing rods 77 are mounted on the top of the perforated plate 18, and the fixing rods 77 are slidably connected to the mounting frame 2 (the sliding part is sealed with graphite packing). A pair of fixed rods 77 are fixedly connected to the same end block 76 at their top ends. The end block 76 is rotatably connected to the crankshaft 78 by a connecting rod 79. The motor 71 is started, and the motor 71 drives the crankshaft 78 to rotate through the gear 75 and the gear 73. The crankshaft 78 drives the orifice plate 18 to reciprocate up and down below the melt surface through the connecting rod 79, the end block 76 and the fixed rods 77. The motion parameters are: frequency 8 times / minute, stroke covering 60% of the liquid level, so that the orifice plate 18 works below the liquid surface and avoids air being forced into the melt.

[0030] In this invention, a pair of orifice plates 18 are provided, and the pair of orifice plates 18 are staggered (i.e., the movement phase difference is 180°). When one orifice plate 18 is pressed down, the other orifice plate 18 is lifted up. The melt between the two orifice plates 18 is subjected to alternating compression and stretching, producing an effect similar to "kneading", which further promotes the coalescence and discharge of bubbles.

[0031] In this invention, a heater 9 is installed on the outer wall of the container 8, and a level gauge 20 is installed inside the container 8. The level gauge 20 is an 80GHz high-frequency non-contact radar level gauge. The controller 3 starts the heater 9 to preheat the container 8 to 220°C. The extruder 4 melts the PE / PP mixture (mass ratio 7:3) and 3% maleic anhydride graft compatibilizer and feeds it into the container 8. When the level gauge 20 detects that the liquid level has reached 70% of the height of the container 8, the controller 3 stops the feeding of the extruder 4.

[0032] Example 3: Based on Example 2, a plastic recycling calendering film forming device for flange barrel production is provided. Both ends of the inner liner 15 are equipped with water pipes 22 communicating with the interior. A heating pipe 23 is installed at the top of the inner liner 15. Softened water is injected into the inner liner 15 through the water pipes 22 until the water level reaches 80% of the inner liner 15's volume. The heating pipe 23 is then activated to heat the water in the upper part of the inner liner 15 to 150°C. Multiple temperature sensors 24 are installed on the outer wall of the inner liner 15. A pressure pipe 21 is installed at the top of the inner liner 15. Nitrogen gas is introduced and pressurized to 0.4 MPa to prevent the water from boiling. The water in the lower part of the inner tank 15 is kept at a low temperature (about 30-40℃). Since there is no lower heating pipe, the low temperature is maintained by natural heat dissipation from the inner tank 15 wall and the injection of cold water. Inside the inner tank 15, hot water rises due to its lower density and cold water sinks due to its higher density, forming a stable vertical temperature gradient. The temperature of the outer wall of the inner tank 15 also shows a distribution of higher at the top and lower at the bottom (temperature sensor 24 can monitor in real time). The water temperature is controlled by controlling the cold water flow rate of water pipe 22 and heating pipe 23.

[0033] In this invention, the outer wall of the inner liner 15 is equipped with multiple staggered support bars 25. The inner wall of the main pressure roller shell 11 is slidably connected to the support bars 25, increasing the pressure-bearing capacity of the main pressure roller shell 11 during calendering. A shaft seal 173 is installed between the cover plate 174 and the shaft end of the inner liner 15. The space between the inner liner 15 and the main pressure roller shell 11 is filled with heat-conducting oil. The shaft seal 173 prevents the heat-conducting oil from leaking. The heat from the outer wall of the inner liner 15 is transferred to the main pressure roller shell 11 through the heat-conducting oil in the annular gap. Since the heat-conducting oil is stationary and does not circulate, its temperature distribution also shows a gradient of hot at the top and cold at the bottom. When the main pressure roller shell 11 rotates, its surface temperature... The temperature gradually decreases from top to bottom along the axial direction. The upper high-temperature zone is about 140-150℃, the middle transition zone is about 90-110℃, and the lower low-temperature zone is about 40-50℃. The sheet-like plastic film preform (temperature about 200℃) extruded by the trapezoidal die head 6 is attached to the upper high-temperature zone of the main pressure roller shell 11. The film preform moves downward with the rotation of the main pressure roller shell 11, passing through the medium-temperature zone and the low-temperature zone in sequence. In the high-temperature zone, the melt maintains good fluidity and fully fills the gap between the pressure rollers. In the medium-temperature zone, the melt cools slowly and the internal stress is gradually released. In the low-temperature zone, the melt is completely shaped and cooperates with the auxiliary roller 14 to complete the final calendering and demold smoothly.

[0034] Working principle: The container 8 is preheated to 220℃. The extruder 4 melts the plastic granules made from waste flange barrels and the compatibilizer and feeds them in. The level gauge 20 controls the feed rate. The vacuum pump is started and the suction pipe 74 maintains a negative pressure of -0.09MPa. The drive mechanism 7 drives two staggered perforated plates 18 to reciprocate below the melt surface (8 times / minute). When pressed down, the one-way plate 19 closes the through hole upward under the pressure of the melt. The perforated plate compresses the melt, causing small bubbles to coalesce into large bubbles. When rising, the negative pressure below causes the one-way plate 19 to open downward. The bubbles escape upward along the through hole and are drawn away. The phase difference between the two plates is 180°, which produces a kneading effect and significantly improves the exhaust efficiency. After venting, the melt is fed into extruder 5 via electric gear pump 16. After plasticization, it is extruded into sheet preform (approximately 200°C) through trapezoidal die head 6. Drive mechanism 12 causes the main pressure roller shell 11 and the auxiliary roller 14 to rotate synchronously in opposite directions. Adjustment mechanism 13 drives screw 136 via motor 134, which in turn moves slide bar 133 and mounting bracket 138 to precisely adjust the calendering position between auxiliary roller 14 and main pressure roller shell 11, facilitating adjustment of the temperature range during calendering. The inner tank 15 is stationary and fixed, and softened water is injected inside. The top heating pipe 23 heats the upper water to 150°C. Nitrogen gas is introduced through the pressure pipe 21 to prevent boiling. The lower water naturally dissipates heat and maintains a temperature of 30-40°C, forming a vertical gradient of hot at the top and cold at the bottom. The heat from the outer wall of the inner tank 15 is transferred to the rotating main pressure roller shell 11 through the stationary heat-conducting oil in the annular gap. The roller surface exhibits an axial temperature gradient: 140-150°C in the upper high-temperature zone, 90-110°C in the middle zone, and 40-50°C in the lower zone. The film preform first adheres to the high-temperature zone, where it has good fluidity and is fully filled. As the roller rotates, it slowly cools down in the medium-temperature zone to release internal stress. It is fully shaped in the low-temperature zone and is calendered with the auxiliary roller 14 and successfully demolded. The guide roller 10 guides the finished film to the winding device.

[0035] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A plastic recycling calendering and film forming equipment for flange barrel production, comprising a base (1), a mounting frame (2) mounted on the base (1), and a controller (3) mounted on the mounting frame (2), characterized in that: The mounting frame (2) is equipped with an extruder one (4), a receiving box (8) and an extruder two (5). The extrusion end of the extruder one (4) is installed on the side wall of the receiving box (8). The feed end of the extruder two (5) is connected to the bottom end of the receiving box (8). The extrusion end of the extruder two (5) is equipped with a trapezoidal die head (6). The mounting frame (2) is connected with an inner liner (15). The inner liner (15) is rotatably connected to a coaxial main pressure roller shell (11). The mounting frame (2) is connected with a secondary roller (14). The mounting frame (2) is connected with a second driving mechanism (12) for driving the main pressure roller shell (11) and the secondary roller (14) to rotate. A perforated plate (18) is slidably connected inside the housing (8), and a one-way plate (19) is rotatably connected to the bottom end of the perforated plate (18). A drive mechanism (7) for driving the perforated plate (18) to move is connected on the mounting frame (2). Both ends of the inner liner (15) are equipped with water pipes (22) that communicate with the interior, and a heating pipe (23) is installed at the top of the interior of the inner liner (15).

2. The plastic recycling calendering and film forming equipment for flange barrel production according to claim 1, characterized in that, The mounting frame (2) is connected to a connecting mechanism (17), which includes an inner support (171). A pair of inner supports (171) are installed on the mounting frame (2), and the pair of inner supports (171) are fixedly connected to both ends of the inner liner (15).

3. The plastic recycling calendering and film forming equipment for flange barrel production according to claim 1, characterized in that, An outer support (172) is installed on the mounting frame (2). Both ends of the main pressure roller shell (11) are equipped with cover plates (174). Both ends of the inner liner (15) are axial. The cover plates (174) are rotatably connected to the shaft ends of the inner liner (15). A shaft seal (173) is installed between the cover plates (174) and the shaft ends of the inner liner (15). The two cover plates (174) are rotatably connected to both ends of the outer support (172).

4. The plastic recycling calendering and film forming equipment for flange barrel production according to claim 3, characterized in that, The second drive mechanism (12) includes a second motor (122), which is mounted on the outer bracket (172). A fifth gear (124) is keyed to the output shaft of the second motor (122), and a third gear (121) is keyed to one of the cover plates (174). The fifth gear (124) meshes with the third gear (121). A fourth gear (123) is keyed to the shaft end of the auxiliary roller (14), and the fourth gear (123) meshes with the third gear (121).

5. The plastic recycling calendering and film forming equipment for flange barrel production according to claim 1, characterized in that, The outer wall of the inner liner (15) is equipped with multiple staggered support bars (25), the inner wall of the main pressure roller shell (11) is slidably connected to the support bars (25), the space between the inner liner (15) and the main pressure roller shell (11) is filled with heat-conducting oil, multiple temperature sensors (24) are installed on the outer wall of the inner liner (15), and a pressure pipe (21) is installed on the top of the inner liner (15).

6. The plastic recycling calendering and film forming equipment for flange barrel production according to claim 3, characterized in that, An adjustment mechanism (13) is connected between the mounting frame (2) and the auxiliary roller (14). The adjustment mechanism (13) includes a mounting block (137). The mounting block (137) is mounted on the mounting frame (2). A pair of slide rods (131) are fixedly connected to the mounting block (137). A slide bar (133) is slidably connected between the pair of slide rods (131). Two pairs of slide rods (132) are slidably connected to the slide bar (133). The ends of the two pairs of slide rods (132) are... The same mounting bracket (138) is fixedly connected. The auxiliary roller (14) is rotatably connected to the mounting bracket (138). A connecting plate (139) is rotatably connected between the auxiliary roller (14) and the cover plate (174). A motor (134) is mounted on the mounting block (137). The output shaft of the motor (134) is connected to a lead screw (136) through a coupling. A slider (135) is mounted on the slide bar (133). The lead screw (136) and the slider (135) are threadedly connected.

7. The plastic recycling calendering and film forming equipment for flange barrel production according to claim 1, characterized in that, The drive mechanism 1 (7) includes a housing (72), which is mounted on the mounting frame (2). A crankshaft (78) is rotatably connected inside the housing (72). One end of the crankshaft (78) extends out of the housing (72) and is keyed to a gear 1 (73). A motor 1 (71) is mounted on the mounting frame (2). A gear 2 (75) is keyed to the output shaft of the motor 1 (71). The gear 2 (75) meshes with the gear 1 (73). A pair of fixing rods (77) are mounted on the top of the perforated plate (18). The fixing rods (77) are slidably connected to the mounting frame (2). The top ends of the pair of fixing rods (77) are fixedly connected to the same end block (76). A connecting rod (79) is rotatably connected between the end block (76) and the crankshaft (78).

8. A plastic recycling calendering and film forming equipment for flange barrel production according to claim 1, characterized in that, The perforated plate (18) is provided in pairs, and the pair of perforated plates (18) are arranged in a staggered manner.

9. A plastic recycling calendering and film forming equipment for flange barrel production according to claim 1, characterized in that, A heater (9) is installed on the outer wall of the container (8), a level gauge (20) is installed inside the container (8), an electric gear pump (16) is installed at the bottom of the container (8), the output end of the electric gear pump (16) is installed on the feed end of the extruder (5), and an air extraction pipe (74) is installed at the top of the container (8).

10. A plastic recycling calendering and film forming equipment for flange barrel production according to claim 1, characterized in that, The mounting frame (2) is equipped with a guide roller (10), which is located on the side of the main pressure roller shell (11) away from the auxiliary roller (14).

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