Thin film sheeting device

Abstract

The utility model discloses a film sheeting device which comprises a machine frame, a film sheeting device, a film sheeting device, a film sheeting device, a film sheeting device, a film sheeting device and a film sheeting device. The sheet forming roller is used for receiving the polymer solution in the molten state and cooling the polymer solution into thin film sheets, the sheet forming roller is arranged above the cooling tank and is rotationally connected with the rack, the bottom part of the sheet forming roller is positioned in the cooling tank, and when the sheet forming roller rotates on the rack, the surface of the sheet forming roller is in contact with the cooling liquid; the extruding device comprises a driving part and an extruding part, the driving part is arranged on the rack, and the driving part is used for driving the extruding part to move towards the surface of the sheet forming roller and enabling the extruding part to abut against the surface of the sheet forming roller. According to the utility model, the sheeting roller rotates to drive the extrusion part abutted against the sheeting roller to rotate so as to realize the technical effect of extruding and dewatering the surface of the sheeting roller, so that residual water left on the surface of the sheeting roller can be effectively removed, the subsequent sheeting quality of a film is not influenced, the sheeting quality of the film is improved, and the cost consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of film forming equipment, and in particular to a film forming device. Background Technology

[0002] The demand for thin-film plastic products is increasing daily, permeating our daily lives. Polypropylene (PP) and polyethylene terephthalate (PET) products are particularly prominent. The equipment used in PP product manufacturing includes several key individual machines: raw material system, extrusion system, sheeting system, longitudinal stretching system, transverse stretching system, traction system, and winding system. Good film quality depends on the foundation of the sheeting process, making the sheeting system a crucial machine. From an external perspective, the quality of the sheet is mainly reflected in the shape, size, and appearance of the cast sheets, which are major factors determining the film's surface quality. From a microscopic perspective, it is mainly reflected in the crystallization state of the sheet, molecular orientation, and melt degradation. These are all major factors determining the film's physical, mechanical, and electrical properties, as well as product yield. After the polymer melt leaves the die head, it is quickly attached to the surface of a low-temperature, high-gloss, chrome-plated cooling roller by the external force of the sheet attachment device. Because the high-temperature melt and the cold roller can exchange heat in time, the melt is rapidly cooled. When it detaches from the stripping roller, it forms a solid sheet. Since the melt viscosity of polypropylene (PP) material is high, a water tank is usually added to the original cold roller to cool the melt quickly. The cooling temperature and the crystallinity of the sheet are easier to control. The lower the temperature, the better the heat conduction, the tighter the sheet adheres to the roller surface, and the smaller the crystallinity of the sheet. The spherulites are fine and uniform, which is beneficial to the stretching and orientation of the polymer.

[0003] Because of the water tank, water stains are unavoidable on the forming roller. If these water stains are not properly cleaned, they will adhere to the surface of the forming roller and stick to the polymer sheet. Once the film is produced, noticeable water stains will appear, affecting the film's appearance and the quality of certain areas. It will also have some impact on subsequent polymer stretching. Utility Model Content

[0004] The purpose of this invention is to solve the technical problem that in existing film forming rollers, cooling water remains on the rollers after film forming, affecting subsequent film forming and resulting in poor film quality. This invention provides a film forming device that uses the rotation of the film forming roller to drive the extrusion section in contact with the roller to achieve the effect of extruding and removing water from the roller surface. This effectively removes residual water from the roller surface without affecting the quality of subsequent film forming, improving film quality and saving costs.

[0005] To address the aforementioned technical problems, this utility model discloses a thin film forming apparatus, comprising:

[0006] The frame contains a cooling tank filled with coolant.

[0007] The forming roller is used to receive molten polymer melt and cool it into a film sheet. The forming roller is set above the cooling tank and rotatably connected to the frame. The bottom part of the forming roller is located in the cooling tank. When the forming roller rotates on the frame, the surface of the forming roller comes into contact with the coolant to reduce the temperature of the film sheet.

[0008] The peeling roller is located on the side where the film forming roller rotates away from the cooling tank. The peeling roller is located above the cooling tank. When the film sheet moves to the peeling roller, the peeling roller guides the film sheet to the next process.

[0009] An extrusion device includes a drive unit and an extrusion unit. The drive unit is mounted on a frame and is used to move the extrusion unit toward the surface of the forming roller and to make the extrusion unit abut against the surface of the forming roller. The extrusion unit is used to clean the coolant from the surface of the forming roller.

[0010] By adopting the above technical solution, the rotation of the forming roller drives the extrusion part that abuts against the forming roller to rotate, thereby achieving the technical effect of extruding and removing water from the surface of the forming roller. This can effectively remove residual water on the surface of the forming roller without affecting the quality of subsequent film forming, thereby improving the quality of film forming and saving costs.

[0011] According to another specific embodiment of the present invention, the extrusion device further includes a fixing part, the extrusion part includes an extrusion roller and a swing arm, the swing arm has a mounting hole in the middle, the swing arm is rotatably installed with the fixing part by a bolt passing through the mounting hole, one end of the swing arm near the forming roller is rotatably connected to the extrusion roller, the driving part is fixedly connected to the other end of the swing arm, and the driving part is used to drive the swing arm to move back and forth in a first direction around the mounting point between it and the fixing part.

[0012] According to another specific embodiment of the present invention, the surface of the extrusion roller is provided with a flexible extrusion layer, the material of which includes rubber.

[0013] According to another specific embodiment of the present invention, the fixed part is a cylinder chamber mounted on the frame, the driving part is a driving cylinder, the driving cylinder is mounted in the cylinder chamber, the cylinder chamber has an opening on the side near the top, and one end of the swing arm connected to the driving part passes through the opening and is connected to the driving shaft of the driving cylinder.

[0014] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that it also includes an attachment device, which is disposed on the side where the forming roller rotates into the cooling tank. The attachment device includes a first nozzle facing the surface of the forming roller, for making the film sheet adhere tightly to the forming roller.

[0015] According to another specific embodiment of the present invention, the embodiment of the present invention also includes a dewatering fan, which is disposed above the extrusion device and close to the sheet forming roller.

[0016] According to another specific embodiment of the present invention, the present invention discloses a water blowing fan including a housing, a cavity with a bottom opening inside the housing, the housing covering the top of the forming roller, and a second nozzle being provided on both sides of the inner sidewall of the cavity, the two second nozzles facing the surface of the forming roller and being arranged at an angle to each other; the housing is fixed on the frame by brackets provided on both sides of the forming roller.

[0017] According to another specific embodiment of the present invention, the embodiment of the present invention discloses that the water blower also includes a third nozzle, which is disposed on the outer side wall of the outer shell.

[0018] There are two third nozzles, which are set at an angle to each other above the forming roller and close to both sides of the forming roller.

[0019] According to another specific embodiment of the present invention, the embodiment of the present invention also includes protective nets disposed on the frame and located on both sides of the forming roller.

[0020] The beneficial effects of this application are as follows: the rotation of the forming roller drives the extrusion part that abuts against the forming roller to rotate to achieve the technical effect of extruding and removing water from the surface of the forming roller. This can effectively remove residual water on the surface of the forming roller without affecting the quality of subsequent film forming, thereby improving the quality of film forming and saving costs. Attached Figure Description

[0021] Figure 1 This diagram illustrates the structure of the thin film forming apparatus according to an embodiment of the present invention. Figure 1 ;

[0022] Figure 2 This diagram shows a structural schematic of the water removal device according to an embodiment of the present invention.

[0023] Figure 3 This diagram shows the structure of the water removal fan according to an embodiment of the present invention;

[0024] Figure 4 This diagram illustrates the structure of the thin film forming apparatus according to an embodiment of the present invention. Figure 2 . Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0026] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model 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 the utility model.

[0028] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0030] Reference Figures 1 to 4This application provides a film forming apparatus, comprising: a frame 1, which has a cooling tank and a coolant therein; a forming roller 2, which receives molten polymer melt and cools it into a film sheet, the forming roller 2 being disposed above the cooling tank and rotatably connected to the frame 1, the bottom part of the forming roller 2 being located inside the cooling tank, and when the forming roller 2 rotates on the frame 1, the surface of the forming roller 2 contacting the coolant to reduce the temperature of the film sheet; a peeling roller 4, disposed on the side of the forming roller 2 that rotates away from the cooling tank, the peeling roller 4 being located above the cooling tank; and an extrusion device 3, which includes a drive unit 31 and an extrusion unit 32, the drive unit 31 being disposed on the frame 1, the drive unit 31 being used to drive the extrusion unit 32 to move toward the surface of the forming roller 2 and to make the extrusion unit 32 abut against the surface of the forming roller 2, the extrusion unit 32 being used to clean the coolant from the surface of the forming roller 2.

[0031] In this embodiment, the frame 1 is made entirely of stainless steel through precision casting and machining, featuring light weight, corrosion resistance, and good structural stability. Its external design is a cuboid frame structure, and its internal design is optimized for the rational layout of all components.

[0032] The cooling tank is located in the middle of frame 1 and is securely connected to the main body of frame 1 by welding. The internal dimensions of the cooling tank are determined according to the size of the forming roller 2 and production requirements, and its depth ensures that the bottom part of the forming roller 2 can be fully immersed in the coolant. The inner wall of the cooling tank is made of stainless steel and polished to reduce coolant residue and corrosion risks. The bottom of the cooling tank is connected to an external pump station to ensure that the coolant can continuously and stably circulate within the cooling tank, maintaining a uniform cooling temperature. At the same time, a coolant circulation filtration system is installed at the external pump station to effectively filter impurities in the coolant, ensuring the cleanliness of the coolant.

[0033] The top and sides of the frame 1 are equipped with multiple mounting positions and adjusting track positioning pins for precise installation and adjustment of components such as sheet forming roller 2, peeling roller 4, extrusion roller 321 and dewatering fan 5, ensuring that the relative positional accuracy between each component is maintained at a relatively precise position.

[0034] The forming roller 2 is made of alloy steel, forged and heat-treated to improve its strength and hardness. Its surface undergoes precision polishing to achieve a mirror-like smoothness, followed by chrome plating to enhance its wear resistance and thermal conductivity. The roller diameter and length are determined based on the width of the film to be produced; typically, the width of forming roller 2 is wider than the maximum width of the film to prevent polymer melt overflow. A cooling water channel is also incorporated within forming roller 2, connected to an external pump station to form a circulating cooling system. The external pump station controls the flow rate and temperature of the cooling water in the channel, ensuring a constant supply of cooling water at a suitable temperature and flow rate. When the molten polymer comes into contact with the surface of the forming roller, heat is rapidly transferred from the polymer melt to the forming roller. The cooling water in the channel absorbs this heat, reducing the surface temperature of the forming roller. Due to the excellent thermal conductivity of the forming roller, it can quickly remove the heat from the polymer melt, allowing the polymer melt to cool and form a film in a very short time.

[0035] To further improve cooling efficiency, the cooling water channels within the roller body can be arranged in a spiral pattern. This design increases the contact area and contact time between the cooling water and the roller body, resulting in more thorough heat exchange.

[0036] The roller shaft is made of high-strength stainless steel and is connected to the roller body with an interference fit. High-precision tapered roller bearings are installed at both ends. The bearing housings are made of cast iron and are tightly connected to the frame 1 to ensure that the forming roller 2 can run smoothly at high speed.

[0037] The roller shaft at one end of the forming roller 2 extends out of the frame 1 and is directly driven by an AC motor to achieve precise speed control and torque output. The speed can be adjusted according to different polymer melt characteristics and film thickness requirements.

[0038] The peeling roller 4 is made of rubber, which has good flexibility and wear resistance. Its surface is textured to increase friction with the film during sheet formation. The roller diameter is set as needed, and its length is the same as that of the forming roller 2.

[0039] The roller is made of carbon steel with a chrome-plated surface. Deep groove ball bearings are installed at both ends, and the bearing housings are mounted on an adjustable bracket 53. The bracket 53 is fixed on the adjustment track of the frame 1. By adjusting the position of the bracket 53, the gap between the peeling roller 4 and the film forming roller 2 can be controlled within a preset distance, and the angle of the peeling roller 4 can be adjusted to ensure that the peeling angle between it and the film forming roller is within a reasonable range, so as to ensure that the film can be peeled off smoothly without wrinkles or deformation.

[0040] To prevent the coolant remaining on the surface of the forming roller 2 after film forming from affecting the subsequent polymer melt cooling and forming, the coolant on the surface of the forming roller 2 needs to be removed. After the finished film on the surface of the forming roller 2 is peeled off by the peeling roller 4, the drive unit 31 is used to move the extrusion unit 32 toward the surface of the forming roller 2, so that the extrusion unit 32 abuts against the surface of the forming roller 2. The extrusion unit 32 is driven to rotate by the forming roller 2. While the extrusion unit 32 is rotating, the coolant on the surface of the forming roller 2 is gradually squeezed to both sides of the forming roller 2 and discharged from the surface of the forming roller 2.

[0041] The drive unit 31 is fastened to the frame 1 by bolts, and the connection is designed with a reinforcing plate to distribute the force; it is also equipped with a displacement sensor to provide real-time feedback on the position information of the extrusion unit 32, and to achieve automated control in conjunction with the control system.

[0042] The extrusion section 32 is designed with a smooth cylindrical surface to better conform to the surface of the forming roller 2. The extrusion section 32 is connected to the drive section 31 and is driven by the drive section 31 to move to abut against the surface of the forming roller 2, squeezing and scraping off the coolant on the surface of the forming roller 2.

[0043] The specific operation mode of the film forming device of this application is as follows: start the drive motor of the forming roller 2, adjust the speed of the forming roller 2 to the initial set value, and start the drive device 3 and the dewatering fan 5 at the same time.

[0044] Molten polymer melt is passed through a die onto the surface of forming roller 2 and evenly distributed on its surface. When the molten polymer melt comes into contact with the surface of the forming roller, heat is rapidly transferred from the polymer melt to the forming roller. Due to the excellent thermal conductivity of the forming roller, the heat from the polymer melt is quickly carried away, allowing the polymer melt to cool and form a thin film in a very short time. During the rotation of the forming roller, the thin film exchanges heat with the coolant in the cooling tank through the roller surface, further reducing the temperature of the thin film.

[0045] After the film is peeled off, the drive unit 31 of the extrusion roller 321 drives the extrusion unit 32 to move toward the surface of the film forming roller 2 according to the preset program or the operator's instructions, so that the extrusion roller comes into contact with the surface of the film forming roller 2, and the residual coolant on the surface of the film forming roller 2 is extruded and scraped off, and the scraped coolant flows back to the cooling tank.

[0046] In this application, the coolant used is treated cooling water. Using cooling water can effectively absorb and remove a large amount of heat from the molten polymer melt, thereby rapidly cooling the polymer melt onto the surface of the forming roller 2 to form a thin film. Furthermore, cooling water is relatively easy to obtain, and its cost is almost negligible, significantly reducing cooling costs.

[0047] Meanwhile, under normal temperature and pressure conditions, water is a chemically stable substance. Using cooling water as a coolant can prevent chemical reactions such as decomposition and polymerization of the polymer melt. Water has relatively low viscosity and high fluidity. While effectively removing heat from the polymer melt, the good fluidity of water results in relatively little residue remaining on the surface of the finished film and the forming roller 2, making it easy to clean.

[0048] By adopting the above technical solution, the extrusion part 32 that abuts against the film forming roller 2 is driven to rotate to achieve the technical effect of extruding and removing water from the surface of the film forming roller 2. This can effectively remove residual water on the surface of the film forming roller 2 without affecting the quality of subsequent film forming, thereby improving the quality of film forming and saving costs.

[0049] Continue to refer to Figure 2 In one feasible embodiment, the extrusion device 3 further includes a fixing part 33. The extrusion part 32 includes an extrusion roller 321 and a swing arm 322. A mounting hole 34 is provided in the middle of the swing arm 322. The swing arm 322 is rotatably mounted to the fixing part 33 by bolts passing through the mounting hole 34. One end of the swing arm 322 near the forming roller 2 is rotatably connected to the extrusion roller 321. The driving part 31 is fixedly connected to the other end of the swing arm 322. The driving part 31 is used to drive the swing arm 322 to move back and forth in a first direction around its mounting point with the fixing part 33. A flexible extrusion layer is provided on the surface of the extrusion roller 321. The flexible extrusion layer is made of rubber. The fixing part 33 is a cylinder chamber set on the frame 1. The driving part 31 is a driving cylinder. The driving cylinder is set in the cylinder chamber. An opening is provided on the side of the cylinder chamber near the top. One end of the swing arm 322 connected to the driving part 31 passes through the opening and is connected to the drive shaft of the driving cylinder.

[0050] In this embodiment, the main structure of the fixing part 33 is a cuboid with an internal receiving compartment made of metal. The top opening of the fixing part 33 is used to install the swing arm 322, which is rotatably connected to the swing arm 322 by bolts, allowing the swing arm 322 to rotate smoothly when installed on the fixing part 33. The connection surface between the fixing part 33 and the frame 1 is designed with a positioning keyway. During assembly, a custom positioning key is embedded to prevent the fixing part 33 from shifting or rotating on the frame 1, ensuring a stable connection.

[0051] The swing arm 322 is elongated. To allow the extrusion roller 321 to better contact with the forming roller 2, the swing arm 322 can also be an arc-shaped elongated arm. To ensure uniform force distribution and reduce stress concentration, key transition points are rounded. The swing arm 322 is connected to the extrusion roller 321 via bearings, allowing the extrusion roller 321 to rotate with the forming roller 2 when they contact each other. This allows the extrusion roller 321 to squeeze the coolant on the surface of the forming roller 2 to both sides and discharge it from the forming roller 2.

[0052] The surface of the extrusion roller 321 is made of rubber or polyurethane, which has good elasticity and wear resistance. The surface shape of the extrusion roller 321 is designed as a slightly curved cylindrical surface to better fit the surface of the forming roller 2. The width of the extrusion roller 321 is wider than that of the forming roller 2, which allows for better drainage of coolant from the surface of the forming roller 2.

[0053] If the drive unit 31 uses a drive cylinder to drive the swing arm 322, the drive unit 31 is located inside the fixed part 33, and the drive rod is connected to the swing arm 322. It moves back and forth in the first direction, driving the swing arm 322 to rotate around its connection point with the fixed part 33, so that the extrusion roller 321 abuts against the forming roller 2, so that the extrusion roller 321 contacts the surface of the forming roller 2 evenly with a certain pressure, and then the forming roller 2 drives the extrusion roller 321 to rotate, squeezing and scraping off the coolant on the surface of the forming roller 2.

[0054] In one feasible embodiment, an attachment device 6 is also included, disposed on the side where the forming roller 2 rotates into the cooling tank. The attachment device 6 includes a first nozzle facing the surface of the forming roller 2 for tightly attaching the film sheet to the forming roller.

[0055] In this embodiment, after the polymer melt is cooled into a film on the surface of the forming roller, in order to prevent poor adhesion due to wrinkling and air bubbles generated on the surface of the forming roller during the cooling of the film sheet, the bonding device 6 blows air towards the film sheet to squeeze out the air bubbles between the film sheet and the forming roller.

[0056] The attaching device 6 is fixed to the frame 1 by a bracket 53. The bracket 53 is bolted to the fan housing 51 to prevent vibration during fan operation. The bracket 53 is designed to be adjustable in angle and position, facilitating precise adjustment of the relative position of the first nozzle and the forming roller 2. The first nozzle adopts a flat-mouth design, and the length-to-width ratio of the air outlet is set according to the width of the forming roller 2 and the required cooling area, ensuring that the blown airflow is flat and evenly covers the roller surface, making the blown airflow velocity uniform and stable.

[0057] Continue to refer to Figure 3 In one feasible embodiment, a dewatering fan 5 is also included, which is disposed above the extrusion device 3 and close to the forming roller 2. The dewatering fan includes a housing 51, which has a cavity with a bottom opening inside. The housing 51 covers the forming roller 2. Second nozzles 52 are respectively disposed on both sides of the inner sidewall of the cavity. The two second nozzles 52 face the surface of the forming roller 2 and are disposed at an angle to each other. The housing 51 is fixed to the frame 1 by brackets 53 disposed on both sides of the forming roller 2.

[0058] In this embodiment, after the extrusion roller 321 extrudes the coolant on the surface of the forming roller 2, in order to avoid the coolant remaining on the surface of the forming roller 2, a dewatering fan 5 is used to blow away and dry the coolant on the surface of the forming roller 2. The dewatering fan 5 operates in conjunction with the extrusion device 3. The dewatering fan 5 starts synchronously at the moment the extrusion device 3 starts working. The airflow direction of the dewatering fan 5 is matched with the rotation direction of the extrusion roller 321 to form a co-current or counter-current sweeping effect. The best sweeping method is selected through testing and optimization to improve the water droplet removal efficiency.

[0059] In this application, the outer shell 51 is made of stainless steel. The top of the outer shell 51 is designed in a dome shape to facilitate the smooth flow of air and reduce the generation of internal turbulence. At the connection between the outer shell 51 and the bracket 53, multiple reinforcing ribs are provided in a radial pattern to enhance the stability of the connection and ensure that the vibration of the equipment during operation will not cause the outer shell 51 to loosen or shift.

[0060] The second nozzle 52 is made of stainless steel and is cylindrical in shape, precision stamped and bent. Its internal air duct has a tapering design, with a larger inlet diameter to facilitate airflow convergence and a narrower outlet to increase airflow velocity and impact force. An adjustable guide vane is designed at the outlet; the angle of the guide vane can be finely adjusted via a manual knob or electric actuator to change the airflow direction, achieving precise adjustment to meet the water removal needs of different locations on the surface of the forming roller 2 under various working conditions. The two second nozzles 52 are set at an angle relative to each other; the included angle was determined through simulation experiments based on the width of the forming roller 2 and the water distribution. This angled arrangement allows the airflow to converge on the roller surface, creating a counter-current and entraining effect, efficiently stripping and removing water droplets from the roller surface. The nozzle is installed 2-3 cm above the surface of the forming roller 2, and can be finely adjusted up and down via a screw and nut mechanism, facilitating the search for the optimal water removal height during debugging and ensuring complete coverage of the roller surface without any dead corners.

[0061] The bracket 53 is made of high-strength alloy steel and is assembled into a frame structure through welding. The frame is designed with a stable triangular layout to ensure that the load-bearing capacity meets the vibration and impact requirements of the equipment operation. The bottom of the bracket 53 is fastened to the frame 1 with bolts.

[0062] The support frame 53 is designed with a liftable and telescopic structure. The lifting part uses a screw jack, driven by a handwheel or motor, to meet the different diameter requirements of the forming rollers 2 on different production lines. The telescopic part adopts a nested square tube design, with the inner and outer tubes fixed by positioning pins, facilitating the adjustment of the position of the dewatering fan 5 along the axial direction of the forming rollers 2 for precise alignment. One side of the outer casing is rotatably connected to the frame via a rotating shaft. The support frame includes a cylinder, which is connected to the other side of the outer casing, and the piston rod of the cylinder is connected to the other side of the outer casing. The cylinder is used to drive the outer casing to open and close along the rotating shaft.

[0063] In one feasible embodiment, the water blower further includes a third nozzle 9, which is disposed on the outer wall of the housing 51; there are two third nozzles 9, which are disposed at an angle to each other above the forming roller 2 and close to both sides of the forming roller 2.

[0064] In this embodiment, two third nozzles 9 are respectively located on both sides of the forming roller 2. Their flat-mouth design ensures sufficient airflow velocity and impact force, accurately and efficiently blowing away water droplets from the edge of the forming roller 2. The nozzle outlet edge is finely rounded to make the airflow smoother and more stable, improving the water droplet dispersion effect.

[0065] The third nozzle 9 and the outer wall of the outer casing 51 are connected by a detachable structure. The outer casing is connected to a fixing rod, and the third nozzle is fixed to the fixing rod by a rubber clamp. The relative position of the third nozzle and the forming roller can be adjusted by adjusting the rubber clamp.

[0066] The nozzle 9 is fixed in place using a combination of specially designed slots and bolts. The third nozzle 9 is installed 1-3 cm above the edge of the forming roller 2 to achieve optimal water blowing effect. Height adjustment holes are pre-drilled on the corresponding positions on the outer wall of the outer casing 51, allowing for fine adjustment using shims of different sizes or fine-tuning screws. The two third nozzles 9 are set at an angle facing away from each other; the included angle is adjusted based on the diameter of the forming roller 2, the edge curvature, and the simulation results of water droplet dispersion.

[0067] In one feasible embodiment, a protective net 7 is also provided on the frame 1 on both sides of the forming roller 2.

[0068] In this embodiment, the main body of the protective net 7 is made of high-strength stainless steel wire, which has good corrosion resistance, can adapt to the humid and complex environment of the workshop, prevents rust and damage, and extends service life. The protective net 7 is used to prevent personnel from contacting hazardous areas: during production, the forming roller 2 may be in a high-speed rotating state, which can easily cause operators to be caught or pinched. The protective net 7 forms a physical barrier between personnel and the forming roller 2, effectively preventing operators' hands, clothing, etc., from accidentally contacting the forming roller 2, greatly reducing the probability of safety accidents and ensuring the personal safety of workers.

[0069] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A film sheeting apparatus characterized by comprising: The utility model relates to a polymer film production line, which comprises: a rack, a cooling tank is arranged in the rack, and a cooling liquid is arranged in the cooling tank; a sheeting roller, which is used to receive a polymer melt in a molten state and cool the polymer melt into a film sheet, is arranged above the cooling tank and is rotationally connected to the rack, a bottom part of the sheeting roller is located in the cooling tank, a surface of the sheeting roller is in contact with the cooling liquid when the sheeting roller rotates on the rack, and the surface of the sheeting roller is used to reduce the temperature of the film sheet; a stripping roller, which is arranged on a side of the sheeting roller away from the cooling tank, is located above the cooling tank, and the film sheet is guided to a next process by the stripping roller when the film sheet moves to the stripping roller; an extrusion device, which comprises a driving part and an extrusion part, the driving part is arranged on the rack, the driving part is used to move the extrusion part to the surface of the sheeting roller and make the extrusion part abut against the surface of the sheeting roller, and the extrusion part is used to clean the cooling liquid on the surface of the sheeting roller.

2. The film sheeting apparatus of claim 1, wherein, The extrusion device further comprises a fixing part, the extrusion part comprises an extrusion roller and a swing arm, a mounting hole is arranged in the middle of the swing arm, the swing arm is rotationally mounted to the fixing part through a bolt penetrating through the mounting hole, one end of the swing arm close to the sheeting roller is rotationally connected to the extrusion roller, and the other end of the swing arm is fixedly connected to the driving part, the driving part is used to move the swing arm to and from along a first direction around the mounting point of the swing arm to the fixing part.

3. The film sheeting apparatus of claim 2, wherein, A flexible extrusion layer is arranged on the surface of the extrusion roller, and the material of the flexible extrusion layer comprises rubber.

4. The film sheeting apparatus of claim 2, wherein, The fixing part is a cylinder chamber arranged on the rack, the driving part is a driving cylinder, the driving cylinder is arranged in the cylinder chamber, an opening is arranged on a side close to the top of the cylinder chamber, and one end of the swing arm connected to the driving part penetrates through the opening and is connected to a driving shaft of the driving cylinder.

5. The film sheeting apparatus of claim 1 wherein, The utility model further comprises an attaching device arranged on a side of the sheeting roller entering the cooling tank, the attaching device comprises a first blowing nozzle, the first blowing nozzle faces the surface of the sheeting roller, and the first blowing nozzle is used to make the film sheet closely attach to the sheeting roller.

6. The film sheeting apparatus of claim 1, wherein, The utility model further comprises a water removal fan, the water removal fan is arranged above the extrusion device and close to the sheeting roller.

7. The film sheeting apparatus of claim 6, wherein, The water removal fan comprises a shell, a cavity with a bottom opening is arranged in the shell, the shell covers the top of the sheeting roller, second blowing nozzles are arranged on the inner side walls of the cavity, the two second blowing nozzles face the surface of the sheeting roller and are arranged at an angle, and the shell is fixed on the rack through supports arranged on both sides of the sheeting roller.

8. The film sheeting apparatus of claim 7, wherein, The water removal fan further comprises third blowing nozzles, and the third blowing nozzles are arranged on the outer side walls of the shell. The third blowing nozzles are arranged at an angle on both sides of the sheeting roller above the sheeting roller.

9. The film sheeting apparatus of claim 1 wherein, The utility model further comprises protective nets arranged on both sides of the sheeting roller on the rack.

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