Multi-channel shunting type extrusion die head, film production extrusion device and preparation equipment

Abstract

The invention relates to the technical field of film production, in particular to a multi-channel flow dividing type extrusion die head, a film production extrusion device and preparation equipment, the multi-channel flow dividing type extrusion die head comprises a die head body, the die head body comprises a feeding port, n discharging ports and a communicating runner, the feeding port is located in the center of the die head body, and the n discharging ports are located in the center of the die head body; the receiving device is used for receiving molten fluid materials; the n discharge ports are uniformly distributed in the circumferential direction by taking the center of the die head body as an axis; the n discharge ports are all communicated with the feed port and are used for distributing and extruding the molten fluid material entering from the feed port to the n casting devices; the communicating runner is formed in the die head body and is used for communicating the feed port with the n discharge ports so as to guide the molten fluid material from the feed port to the n discharge ports; n > = 2. Through the arrangement of the annular extrusion die head with the n discharge ports, multiple films can be produced on the same production line at the same time, the production efficiency and the performance consistency of the multiple films are improved, and the plant space is saved.

Description

Technical Field

[0001] This application relates to the field of film production technology, and more specifically to a multi-channel diversion extrusion die, a film production extrusion device, and a preparation equipment. Background Technology

[0002] Cast film production is one of the mainstream processes in film processing. Current technologies generally employ linear extrusion and single-line winding. The specific process involves extruding material through a single T-die or I-die into a flat pre-formed film, which is then cooled and shaped on cooling rollers, and finally wound up by a unidirectional winding device. However, this traditional method suffers from significant drawbacks, including substantial production efficiency bottlenecks, large equipment footprint, and limited output flexibility. Specifically, traditional production relies on single-line output, with capacity directly limited by the extruder's speed and the production line's speed. Further increasing output requires investing in a completely new, independent production line, which is costly. Furthermore, the linear layout from the die, cooling device to the winding device necessitates a long factory space. A single production line can only produce one roll or two rolls of film side-by-side at a time, resulting in insufficient product flexibility.

[0003] Therefore, there is an urgent need for a new type of equipment that can break through the existing linear production model. Summary of the Invention

[0004] This application provides a multi-channel diversion extrusion die, a film production extrusion device, and a preparation equipment, which combine high capacity, compact layout, and flexible production characteristics to at least partially solve the above-mentioned technical problems.

[0005] According to a first aspect, embodiments of this application provide a multi-channel diversion extrusion die, including a die body, the die body comprising:

[0006] The feed inlet is located at the center of the die head body and is used to receive molten fluid material;

[0007] n discharge ports, uniformly arranged circumferentially around the center of the die head body; each of the n discharge ports is connected to the inlet, used to divert and extrude the molten fluid material entering from the inlet to the n casting devices; and

[0008] A connecting channel is formed in the die head body to connect the inlet and the n outlets, so as to guide the molten fluid material from the inlet to the n outlets;

[0009] Where n≥2.

[0010] In some optional embodiments, the connecting channel includes n independent fluid cavities extending radially along the die head body, one end of each fluid cavity being connected to the inlet and the other end being connected to an outlet; the die head body is provided with n partitions radially arranged to divide the connecting channel into n fluid cavities.

[0011] In some optional embodiments, the connecting channel includes an annular channel and n branch channels. The annular channel connects the feed inlet with the n branch channels. The annular channel has n partitions at one end near the discharge outlet. The partitions enclose the n branch channels to form the n branch channels. The n branch channels are connected to the n discharge outlets in a one-to-one correspondence.

[0012] In some optional embodiments, the discharge port is provided with an adjusting lip plate for adjusting the opening degree of the discharge port.

[0013] According to a second aspect, an embodiment of this application provides a film production extrusion apparatus, comprising:

[0014] Extrusion mechanism;

[0015] As described above, in the multi-channel diversion type extrusion die, the discharge end of the extrusion mechanism is connected to the feed port of the die body, and is used to provide the molten fluid material to the feed port.

[0016] In some optional embodiments, the extrusion mechanism includes a feeding assembly, a processing assembly, a metering assembly, a melt filtering assembly, and a melt flow blocking assembly arranged sequentially along the material conveying direction;

[0017] The feeding assembly is used to supply raw materials to the feeding assembly;

[0018] The feeding assembly is used to mix the raw materials;

[0019] The processing assembly includes a heating element and a stirring screw. The heating element is used to heat the raw material to a melting temperature, and the stirring screw is used to shear and mix the raw material to form a homogeneous molten fluid material.

[0020] The metering component is used to control the output flow rate of the molten fluid material;

[0021] The melt filter assembly is used to intercept unmelted particles and impurities in the molten fluid material;

[0022] The melt flow-blocking component is used to equalize the pressure distribution of molten fluid materials.

[0023] In some optional embodiments, the processing component is connected to the metering component via a first conveying pipe; the metering component is connected to the melt filtering component via a second conveying pipe; the melt filtering component is connected to the melt flow blocking component via a third conveying pipe; and the melt flow blocking component is connected to the feed inlet via a fourth conveying pipe.

[0024] In some alternative embodiments, the film production extrusion apparatus further includes a cooling mechanism disposed outside the processing assembly for adjusting the temperature of the processing assembly to regulate the temperature of the molten fluid material.

[0025] According to a third aspect, an embodiment of this application provides a thin film production preparation apparatus, comprising:

[0026] The film production extrusion apparatus described above is used to divert and extrude the molten fluid material through the n discharge ports into n pre-formed films;

[0027] n casting devices are arranged radially and uniformly around the center of the die body, and each of the n casting devices corresponds to one of the n discharge ports. These devices are used to cast and cool the pre-formed film extruded from the n discharge ports into n thin films.

[0028] n winding devices are provided, each corresponding to one of the n casting devices, and are evenly distributed with the center of the die head body as the center. They are used to wind the n films after casting and cooling into finished rolls.

[0029] In some optional embodiments, the casting apparatus includes a plurality of cooling rollers arranged sequentially along the traveling direction of the film, each cooling roller having a cooling channel and a cooling medium therein, for adjusting the temperature of the cooling rollers so that the pre-formed film is cured into a film;

[0030] The winding device is provided with an edge trimming assembly on the side near the casting device, which is used to trim the edge of the film.

[0031] According to the multi-channel diversion extrusion die in this embodiment, there are n discharge ports evenly arranged circumferentially with the center of the die body as the axis, so that the molten fluid material entering the die body from the feed port can be uniformly extruded in all directions at 360°. The extrusion die, together with the casting device and the winding device, can produce n films at the same time on the same production line, which effectively improves production efficiency.

[0032] The film production extrusion apparatus and preparation equipment according to this embodiment includes an extrusion die with n discharge ports, enabling center-distributed production to prepare n films simultaneously on the same production line. This results in a production capacity n times that of a single-line production line, significantly reducing equipment and energy costs per unit output and improving production efficiency. Since the n films originate from the same die, the same batch of materials, and are formed under the same cooling environment, their thickness and performance consistency are superior to products produced from multiple independent production lines, giving the n films the advantage of good performance consistency. The discharge ports, casting device, and winding device are all arranged circumferentially, improving the equipment layout from a linear to a compact circular layout, significantly saving factory space. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the extrusion die in the first embodiment;

[0034] Figure 2 This is a schematic diagram of the extrusion die in the second embodiment;

[0035] Figure 3 This is a schematic diagram of the extrusion die in the third embodiment;

[0036] Figure 4 This is a schematic diagram of the extrusion die in the fourth embodiment;

[0037] Figure 5 This is a schematic diagram of the discharge port structure in one embodiment;

[0038] Figure 6 This is a schematic diagram of the structure of a film production extrusion apparatus in one embodiment;

[0039] Figure 7 This is a schematic diagram of the structure of the processing component in one embodiment;

[0040] Figure 8 This is a schematic diagram of the structure of a thin film production and preparation equipment in one embodiment;

[0041] Figure 9 This is a schematic diagram of the structure of the casting device and the winding device in one embodiment;

[0042] Figure 10 This is a schematic diagram of the structure of the cooling roller in one embodiment.

[0043] Among them: 1. Film production extrusion equipment;

[0044] 11. Extrusion mechanism; 111. Feeding assembly; 112. Feeding assembly; 113. Processing assembly; 1131. Heating element; 1132. Stirring screw; 1133. Cooling mechanism; 114. Metering assembly; 115. Melt filtration assembly; 116. Melt flow obstruction assembly; 117. First conveying pipe connection; 118. Second conveying pipe connection; 119. Third conveying pipe connection; 1191. Fourth conveying pipe connection; 12. Extrusion die; 121. Die body; 1211. Feed inlet; 1212. Discharge outlet; 1213. Connecting flow channel; 1214. Fluid cavity; 1215. Annular flow channel; 1216. Dividing flow channel; 122. Separator; 123. Adjusting lip plate;

[0045] 2. Casting apparatus; 21. Cooling roller; 211. First cooling roller; 212. Second cooling roller; 213. Third cooling roller; 22. Cooling channel;

[0046] 3. Winding device; 31. Edge trimming assembly; 32. Winding assembly;

[0047] M, the center of the die head body; F1, the material conveying direction; F2, the film traveling direction. Detailed Implementation

[0048] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0049] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0050] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0051] Thin films are thin and flexible materials that are widely used in many fields such as packaging, electronics, building materials, medical, and new energy. According to their materials, films can be divided into plastic films (such as PE, PP, PET, and PVC films), metal films (such as aluminum foil and copper foil), composite films (such as PE / PET and aluminum-plastic composite films), and special functional films (such as battery separators, optical films, and barrier films).

[0052] Thin film preparation processes generally include mixing, melt extrusion, casting and cooling. In some applications, such as battery separators, thin films also need to undergo heat treatment and stretching to form microporous structures.

[0053] Currently, the equipment for film mixing, melt extrusion, and casting cooling is all linearly arranged. A single production line can only produce one roll or two rolls of film side-by-side at a time, resulting in low capacity and low production efficiency. Furthermore, multiple independent production lines not only occupy significant space and increase production costs, but also affect the consistency of film performance. Specifically, the process parameters (such as temperature and pressure) in multiple independent production lines are difficult to synchronize, leading to significant differences in film performance across different production lines.

[0054] This application provides a multi-channel diversion type extrusion die (hereinafter referred to as "extrusion die"). This diversion type structural design enables center-diffusion production. The n annularly arranged discharge ports can form n pre-formed films. Through the corresponding n casting devices and n winding devices, n films can be produced simultaneously on the same production line, achieving a production capacity n times that of a single-line production line. This significantly reduces equipment and energy costs per unit output and improves production efficiency. The n films originate from the same die, the same batch of materials, and are formed under the same cooling environment. Their thickness and performance consistency are superior to products produced from multiple independent production lines, giving the n films the advantage of good performance consistency. The discharge ports, casting devices, and winding devices are all arranged circumferentially (or in the circumferential direction), improving the equipment layout from a linear layout to a compact circular layout, significantly saving factory space.

[0055] Please see Figures 1 to 4The extrusion die 12 includes a die body 121, which includes an inlet 1211, n outlets 1212, and a connecting channel 1213. The inlet 1211 is located at the center M of the die body and is used to receive molten fluid material. The n outlets 1212 are evenly arranged circumferentially around the center M of the die body. The n outlets 1212 are all connected to the inlet 1211 and are used to divert and extrude the molten fluid material entering from the inlet 1211 to the n casting devices. The connecting channel 1213 is formed inside the die body 121 and is used to connect the inlet 1211 and the n outlets 1212 to guide the molten fluid material from the inlet 1211 to the n outlets 1212. The n outlets 1212 can 360° omnidirectionally and uniformly extrude the molten fluid material.

[0056] In some embodiments, the discharge port 1212 is disposed at the edge of the die head body 121 and the discharge port 1212 is opened along the radial direction of the die head body 121 to guide the molten fluid material to the casting device that is uniformly distributed along the circumference of the die head body 121.

[0057] Of course, in some embodiments, the discharge port 1212 is located at the edge of the die head body 121 and is opened downward.

[0058] In some embodiments, n ≥ 2. For example, n can be 2, 3, 4, 5, 6, 7, 8, 9, 10 or any value greater than 2, so that at least n films with consistent (or small) performance can be produced simultaneously.

[0059] In some embodiments, the connecting channel 1213 includes n independent fluid cavities 1214 extending radially along the die body 121. One end of each fluid cavity 1214 is connected to the inlet 1211, and the other end is connected to an outlet 1212. The die body 121 is provided with n partitions 122 radially arranged to divide the connecting channel 1213 into n fluid cavities 1214. Alternatively, the die body 121 can be understood as an annular structure (or cylinder), with the partitions 122 extending from the center M of the die body to the edge of the die body 121, and the included angle between adjacent partitions 122 being the same, to uniformly form n fan-shaped fluid cavities 1214 of equal volume. This allows the molten fluid material to be directly diverted at the inlet 1211, and then the diverted molten fluid material flows along its respective fluid cavity 1214 from the center of the die to the outlet 1212 at its edge.

[0060] Please see Figure 1Where n is 4, the die head body 121 includes 4 discharge ports 1212 and 4 fluid chambers 1214. There are 4 separators 122. These 4 fluid chambers 1214 extend radially from the center of the die head body 121 to its edge and are connected to the discharge ports 1212 in a one-to-one correspondence. The included angle between two adjacent separators 122 is 90°, allowing for the simultaneous production of 4 films. Please refer to [link / reference]. Figure 2 Since n is 8, the die head body 121 includes 8 discharge ports 1212 and 8 fluid chambers 1214. There are 8 separators 122. These 8 fluid chambers 1214 extend radially from the center of the die head body 121 to its edge and are connected to the discharge ports 1212 one-to-one. The angle between two adjacent separators 122 is 45°, allowing for the simultaneous production of 8 films. Please refer to... Figure 3 When n is 10, the die head body 121 includes 10 discharge ports 1212 and 10 fluid chambers 1214. Ten separators 122 are provided. These 10 fluid chambers 1214 extend radially from the center of the die head body 121 to its edge and are connected to the discharge ports 1212 one-to-one. The angle between two adjacent separators 122 is 36°, allowing for the simultaneous production of 10 films. When n is any value greater than or equal to 2, adaptive adjustments can be made based on the diversion principle and structural design logic of the above embodiments, which will not be described in detail here.

[0061] In this application, the term "radial" refers to a shape that extends outward from the center M of the mold body 121 in a radial direction and is evenly distributed circumferentially, similar to rays radiating from the center. For example, multiple separators 122 are arranged radially, dividing the connecting flow channel 1213 into n symmetrical independent fan-shaped fluid cavities 1214.

[0062] In some embodiments, the connecting channel 1213 includes an annular channel 1215 and n branch channels 1216. The annular channel 1215 connects the inlet 1211 and the n branch channels 1216. A plurality of separators 122 are provided at one end of the annular channel 1215 near the outlet 1212. The separators 122 enclose the n branch channels 1216, which are connected to the n outlets 1212 in a one-to-one correspondence. Alternatively, it can be understood that after the molten fluid material enters the die body 121 through the inlet 1211, it flows uniformly to the outlet 1212 through the annular channel, and then is branched according to the separators 122 provided at the outlet 1212. Please refer to [link to relevant documentation]. Figure 4The number of components n is 4. The die head body 121 has an annular flow channel 1215. Four separators 122 are set at the discharge port 1212 to form a diversion flow channel 1216 connecting the annular flow channel 1215 and the discharge port 1212, so as to simultaneously realize the production of four films. When n is any other value greater than or equal to 2, adaptive adjustments can be made according to the diversion principle and structural design logic of the above embodiment, which will not be described in detail here.

[0063] In some embodiments, the separator 122 is a separator plate structure, which is interference-fitted with the die head body 121 to avoid gaps affecting flow distribution.

[0064] In some embodiments, the separator 122 is provided with flow-blocking protrusions (not shown) to ensure that the molten fluid material in the flow channel 1216 or fluid cavity 1214 flows at a uniform circumferential velocity, thereby effectively improving the consistency of film performance.

[0065] In some embodiments, each flow channel 1216 or fluid cavity 1214 is provided with a temperature monitoring unit (not shown) to uniformly monitor the temperature of the molten fluid material and avoid uneven flow due to different melt temperatures, which could affect the consistency of the film. The temperature monitoring unit can be a temperature sensor.

[0066] In some embodiments, the discharge port 1212 is provided with an adjusting lip plate 123 for adjusting the opening degree of the discharge port 1212. For example, please refer to... Figure 5 An adjustable lip plate 123 is provided at the edge of the die head body 121, which can move along a direction perpendicular to the opening of the discharge port 1212. Figure 5 The material moves in the direction indicated by the middle arrow to adjust the thickness of the pre-formed film extruded from the outlet 1212.

[0067] In some embodiments, the opening range of the discharge port 1212 can be adjusted from 0.05mm to 0.5mm.

[0068] In this application, the term "opening of the discharge port 1212" refers to the width of the slit formed by the adjusting lip plate 123 and the fixed structure. It is a key parameter for controlling the initial thickness of the preform formed by the extrusion of molten fluid material, and its adjustment range directly determines the basic thickness specification of the subsequent cast film.

[0069] In some embodiments, the opening degree of different outlets 1212 can be freely adjusted to form films of different thicknesses at the same time, improving production flexibility. For example, a flow divider valve can be provided at the outlet 1212 to control the melt pressure and flow rate.

[0070] Please see Figure 6The embodiments of this application also provide a film production extrusion apparatus 1, including an extrusion mechanism 11 and an extrusion die 12 as described in any of the above embodiments. The discharge end of the extrusion mechanism 11 is connected to the feed port 1211 of the die body 121, and is used to provide molten fluid material to the feed port 1211. The specific structure of the extrusion die 12 has been described in detail above and will not be repeated here.

[0071] In some embodiments, the film production extrusion apparatus 1 may include at least one extrusion die 12, each extrusion die 12 may have a different number of discharge ports 1212, so that users can select different extrusion dies 12 to cooperate with the extrusion mechanism 11 according to their own needs, so as to achieve the production of different quantities of film at the same time, thereby improving the flexibility of production.

[0072] Please continue reading. Figure 6 , Figure 7 In some embodiments, the extrusion mechanism 11 includes a feeding assembly 111, a feed assembly 112, a processing assembly 113, a metering assembly 114, a melt filtration assembly 115, and a melt flow blocking assembly 116 arranged sequentially along the material conveying direction F1. The feeding assembly 111 is used to supply raw materials to the feed assembly 112; the feed assembly 112 is used to mix the raw materials; the processing assembly 113 includes a heating element 1131 and a stirring screw 1132, the heating element 1131 is used to heat the raw materials to the melting temperature, and the stirring screw 1132 is used to shear and mix the raw materials to form a uniform molten fluid material; the metering assembly 114 is used to control the output flow rate of the molten fluid material; the melt filtration assembly 115 is used to intercept unmelted particles and impurities in the molten fluid material; and the melt flow blocking assembly 116 is used to equalize the pressure distribution of the molten fluid material. For example, the feeding assembly 111 may include a feeding hopper, and the feeding assembly 112 is a hollow structure with a receiving cavity, so that the material entering from the feeding hopper is mixed in this receiving cavity and then enters the processing assembly 113 together. The heating element 1131 of the processing assembly 113 heats and melts the raw material. During the melting process, the stirring screw 1132 further stirs to make the material more uniformly mixed. The metering assembly 114 includes a weighing unit or a flow measurement unit to control the amount of material entering the extrusion die 12. The melt filtration assembly 115 includes a filter screen with filter holes to further filter unmelted particles and impurities. The melt flow obstruction assembly 116 includes flow obstruction protrusions or flow obstruction plates to uniformly distribute the pressure of each part of the molten fluid material.

[0073] In some embodiments, since the flow velocity at the center of the molten fluid material after shearing and stirring by the stirring screw 1132 is larger and the flow velocity at the periphery is smaller, the melt flow-blocking assembly 116 includes a flow-blocking plate arranged along a direction perpendicular to the flow direction of the molten fluid material. The diameter of the flow-blocking hole at the center of the flow-blocking plate is smaller than the diameter of the surrounding holes, so that the flow velocity and pressure at the center and the periphery are consistent.

[0074] In some embodiments, the processing component 113 and the metering component 114 are connected through a first conveying pipe 117; the metering component 114 and the melt filtering component 115 are connected through a second conveying pipe 118; the melt filtering component 115 and the melt flow blocking component 116 are connected through a third conveying pipe 119; and the melt flow blocking component 116 and the feed inlet 1211 are connected through a fourth conveying pipe 1191.

[0075] In some embodiments, the film production extrusion apparatus 1 further includes a cooling mechanism 1133, which is disposed on the outside of the processing assembly 113 and is used to regulate the temperature of the processing assembly 113 to control the temperature of the molten fluid material and prevent the temperature from being too high or too low, thus affecting the performance of the subsequent film. For example, the cooling mechanism 1133 includes a cooling pipe disposed on the outside of the processing assembly 113, the cooling pipe being spirally arranged and containing cooling water.

[0076] Please see Figure 8 The embodiments of this application also provide a film production preparation equipment, including a film production extrusion device 1, n casting devices 2, and n winding devices 3 as described in any of the above embodiments. The film production extrusion device 1 is used to extrude molten fluid material through n discharge ports 1212 into n pre-formed films. Its specific structure has been described in detail above and will not be repeated here. The n casting devices 2 are arranged radially and uniformly with the center of the die head body as the center, and the n casting devices 2 are arranged one-to-one with the n discharge ports 1212. They are used to cast and cool the pre-formed films extruded from the n discharge ports 1212 into n films. The n winding devices 3 are arranged one-to-one with the n casting devices 2 and are arranged uniformly with the center of the die head body as the center. They are used to wind the cast and cooled films into finished rolls.

[0077] In some embodiments, the casting apparatus 2 includes a plurality of cooling rollers 21 arranged sequentially along the film's travel direction F2. Each cooling roller 21 has a cooling channel 22 containing a cooling medium for regulating the temperature of the cooling rollers 21 to solidify the pre-formed film into a thin film. Exemplarily, the cooling channel 22 has a spiral structure and is equipped with circulating cooling water to regulate the temperature of the cooling rollers 21, thereby controlling the roller surface temperature for casting. Please refer to [link to relevant documentation]. Figure 9 and Figure 10The casting apparatus 2 includes three cooling rollers 21 arranged sequentially along the film's travel direction F2: a first cooling roller 211, a second cooling roller 212, and a third cooling roller 213. All three rollers can be made of stainless steel and have internal spiral cooling channels 22 filled with cooling water. Alternatively, other cooling media, such as organic solvents like ethylene glycol, can also be used in the cooling channels 22.

[0078] In this application, the film's travel direction F2 is the direction in which the film moves throughout the entire process of the material being extruded from the outlet 1212, cooled and shaped by the cooling roller 21, and then wound up by the winding device 3. The aforementioned material conveying direction F1 can be the direction in different process flows, and these directions can be the same or different.

[0079] Please continue reading. Figure 9 In some embodiments, the winding device 3 is provided with a trimming assembly 31 on the side near the casting device 2. The trimming assembly 31 is used to trim the edges of the film to form films of different widths. By adjusting or replacing the position of the trimming assembly 31, films of different widths can be produced, and films of different widths can be formed at the same time. Combined with the setting of extrusion dies 12 with different numbers of discharge ports 1212, it helps to achieve the production of films of different widths and quantities, further effectively improving the production flexibility of the preparation equipment. The trimming assembly 31 is pneumatically or electrically driven and can automatically perform the cutting action. The trimming assembly 31 is a commonly used piece of equipment in film production and will not be described in detail here.

[0080] In some embodiments, the winding device 3 includes a winding assembly 32, which is a flip-type winding assembly 32. The winding assembly 32 includes a flipping bracket and at least two winding rollers. The winding rollers are mounted on the flipping bracket, and the two winding rollers are parallel and symmetrical about the axis of rotation of the flipping bracket. One winding roller is located at the winding position and is called the main winding roller, while the other winding roller is located at the unloading position and is called the spare winding roller. The two winding rollers are flipped under the drive of the flipping bracket and alternately serve as the main winding roller and the spare winding roller. A cutter assembly is provided next to the main winding roller. The flip-type winding assembly 32 is a conventional device in the art and will not be described in detail here.

[0081] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A multi-channel diversion type extrusion die, characterized in that, Includes a mold head body, the mold head body comprising: The feed inlet is located at the center of the die head body and is used to receive molten fluid material; n discharge ports, uniformly arranged circumferentially around the center of the die head body; each of the n discharge ports is connected to the inlet, used to divert and extrude the molten fluid material entering from the inlet to the n casting devices; and A connecting channel is formed in the die head body to connect the inlet and the n outlets, so as to guide the molten fluid material from the inlet to the n outlets; Where n≥2.

2. The multi-channel diversion extrusion die according to claim 1, characterized in that, The connecting flow channel includes n independent fluid cavities extending radially along the die head body. One end of each fluid cavity is connected to the feed port, and the other end is connected to a corresponding discharge port. The die head body is provided with n partitions radially arranged to divide the connecting flow channel into n fluid cavities.

3. The multi-channel diversion extrusion die according to claim 1, characterized in that, The connecting channel includes an annular channel and n branch channels. The annular channel connects the feed inlet to the n branch channels. The annular channel has n partitions at one end near the discharge outlet. The partitions enclose the n branch channels to form the n branch channels. The n branch channels are connected to the n discharge outlets one by one.

4. The multi-channel diversion extrusion die according to claim 1, characterized in that, The discharge port is equipped with an adjusting lip plate for adjusting the opening degree of the discharge port.

5. A film production extrusion apparatus, characterized in that, include: Extrusion mechanism; The multi-channel diversion extrusion die as described in any one of claims 1-4, wherein the discharge end of the extrusion mechanism is connected to the feed port of the die body for providing the molten fluid material to the feed port.

6. The film production extrusion apparatus according to claim 5, characterized in that, The extrusion mechanism includes a feeding assembly, a feeding component, a processing assembly, a metering assembly, a melt filtering assembly, and a melt flow blocking assembly arranged sequentially along the material conveying direction; The feeding assembly is used to supply raw materials to the feeding assembly; The feeding assembly is used to mix the raw materials; The processing assembly includes a heating element and a stirring screw. The heating element is used to heat the raw material to a melting temperature, and the stirring screw is used to shear and mix the raw material to form a homogeneous molten fluid material. The metering component is used to control the output flow rate of the molten fluid material; The melt filter assembly is used to intercept unmelted particles and impurities in the molten fluid material; The melt flow-blocking component is used to equalize the pressure distribution of molten fluid materials.

7. The film production extrusion apparatus according to claim 6, characterized in that, The processing component is connected to the metering component via a first conveying pipe; the metering component is connected to the melt filtering component via a second conveying pipe; the melt filtering component is connected to the melt flow blocking component via a third conveying pipe; and the melt flow blocking component is connected to the feed inlet via a fourth conveying pipe.

8. The film production extrusion apparatus according to claim 6, characterized in that, The film production extrusion apparatus also includes a cooling mechanism located outside the processing assembly for adjusting the temperature of the processing assembly to regulate the temperature of the molten fluid material.

9. A thin film production and preparation equipment, characterized in that, include: The film production extrusion apparatus according to any one of claims 5-8 is used to divert and extrude the molten fluid material through the n discharge ports into n pre-formed films; n casting devices are arranged radially and uniformly around the center of the die body, and each of the n casting devices corresponds to one of the n discharge ports. These devices are used to cast and cool the pre-formed film extruded from the n discharge ports into n thin films. n winding devices are provided, each corresponding to one of the n casting devices, and are evenly distributed with the center of the die head body as the center. They are used to wind the n films after casting and cooling into finished rolls.

10. The thin film production and preparation equipment according to claim 9, characterized in that, The casting apparatus includes a plurality of cooling rollers arranged sequentially along the traveling direction of the film. Each cooling roller has a cooling channel and a cooling medium inside the cooling channel, which is used to adjust the temperature of the cooling roller so that the pre-made film is cured into a film. The winding device is provided with an edge trimming assembly on the side near the casting device, which is used to trim the edge of the film.

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