Extrusion production line for PPS special film
By designing an extrusion production line for PPS specialty films and adopting a high-shear extrusion screw structure, the problem of continuous production that cannot be achieved by traditional molding methods has been solved, thereby improving production efficiency and output.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU JWELL MACHINERY
- Filing Date
- 2025-04-11
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional molding methods cannot achieve continuous production of PPS films, resulting in low production efficiency and output.
An extrusion production line for PPS specialty film was designed, including a vacuum feeder, a flat twin extruder, an extrusion die, a horizontal three-roll calender, a cooling roll assembly, and a winding machine. It adopts a high-shear extrusion screw structure to achieve continuous production.
This improved the production efficiency and output of PPS film, enabling continuous production.
Smart Images
Figure CN224210484U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of plastic film production equipment technology, and in particular to an extrusion production line for PPS specialty film. Background Technology
[0002] PPS is a special engineering plastic characterized by high strength, temperature resistance, corrosion resistance, flame retardancy, and radiation resistance. It has significant demand in the automotive, electronics, aerospace, and high-end equipment manufacturing industries. Currently, the traditional method for preparing PPS film is compression molding. However, compression molding cannot achieve continuous production of PPS film, resulting in low production efficiency and output. Summary of the Invention
[0003] In order to solve the above-mentioned technical problems, the purpose of this application is to provide an extrusion production line for PPS special films.
[0004] To achieve the above objectives, this application adopts the following technical solution: an extrusion production line for PPS special film, comprising a vacuum feeder, a flat double extruder, an extrusion die, a horizontal three-roll calender, a cooling roller assembly, a traction machine, and a winding machine arranged sequentially from upstream to downstream. The flat double extruder includes a barrel and a pair of symmetrically arranged extrusion screws. The pair of extrusion screws are rotatably mounted in the barrel. Each extrusion screw includes a mandrel extending in a front-to-back direction and several threaded blocks and several shearing blocks coaxially sleeved on the mandrel and rotating synchronously with the mandrel. The extrusion screws are arranged sequentially from front to back as a first conveying section, a first shearing section, a second conveying section, a second shearing section, and a metering section. The first conveying section, the second conveying section, and the metering section are respectively composed of several threaded blocks connected sequentially from front to back and at least partially... The mandrel described above is composed of a first shearing section and a second shearing section, each consisting of a plurality of threaded blocks, a plurality of shearing blocks, and at least a portion of the mandrel. The threaded blocks connected front to back form threaded portions circumferentially on the mandrel, and the shearing blocks connected front to back form shearing portions circumferentially on the mandrel. The pitch of the threaded portion in the middle portion of the first conveying section is greater than the pitch of the threaded portions at the front and rear ends. The pitch of the threaded portions in the second conveying section and the metering section gradually decreases from front to back. In the first and second shearing sections, the shearing portions and the threaded portions are alternately distributed from front to back, and the thread direction of the last threaded block in each shearing section is opposite to the thread direction of the front threaded block. The total length of the shearing portions in the second shearing section is greater than the total length of the shearing portions in the first shearing section.
[0005] In the above technical solution, it is further preferred that each of the shearing blocks includes a plurality of shearing blades arranged sequentially from front to back, each of the shearing blades has at least two radially outward protrusions, and the protrusions on each of the shearing blocks are arranged in a spiral direction from front to back.
[0006] In the above technical solution, it is further preferred that the plurality of shearing blocks include a first shearing block and a second shearing block, wherein the thickness of the shearing blade of the first shearing block is greater than the thickness of the shearing blade of the second shearing block.
[0007] In the above technical solution, it is further preferred that the first shearing segment and the second shearing segment each include a plurality of first shearing blocks and a plurality of second shearing blocks, wherein the number of second shearing blocks in the second shearing segment is greater than the number of second shearing blocks in the first shearing segment, and the number of first shearing blocks in the second shearing segment is greater than the number of first shearing blocks in the first shearing segment.
[0008] In the above technical solution, it is further preferred that the plurality of threaded blocks include a first threaded block, a second threaded block, a third threaded block, and a fourth threaded block, wherein the pitch of the first threaded block is greater than the pitch of the second threaded block, the pitch of the second threaded block is greater than the pitch of the third threaded block, and the thread direction of the fourth threaded block is opposite to the thread direction of the first, second, and third threaded blocks.
[0009] In the above technical solution, more preferably, the first conveying section includes a third threaded block, a plurality of first threaded blocks and a second threaded block arranged sequentially from front to back; the second conveying section includes a plurality of first threaded blocks and a second threaded block arranged sequentially from front to back; the metering section includes a plurality of first threaded blocks, a plurality of second threaded blocks and a plurality of third threaded blocks arranged sequentially from front to back.
[0010] In the above technical solution, it is further preferred that the first shearing segment includes a plurality of first threaded blocks, a plurality of second threaded blocks, and a fourth threaded block, wherein the fourth threaded block is located at the tail end of the first shearing segment.
[0011] In the above technical solution, it is further preferred that the second shearing segment includes a plurality of second threaded blocks and a fourth threaded block, wherein the fourth threaded block is located at the tail end of the second shearing segment.
[0012] In the above technical solution, it is further preferred that each of the threaded blocks and each of the shearing blocks is connected to the mandrel key.
[0013] In the above technical solution, a further preferred embodiment is that the horizontal three-roll calender includes a first roll, a second roll, and a third roll arranged sequentially from front to back, wherein the first roll is a rubber roll, and the second roll and the third roll are both steel rolls.
[0014] Compared with the prior art, this application achieves the following beneficial effects:
[0015] The extrusion production line of this application is specifically designed for PPS materials. The extrusion screw adopts a high-shear design for PPS materials, which can improve the plasticizing effect and plasticizing efficiency of PPS materials. The extrusion production line of this application can realize the continuous production of PPS special films, greatly improving production efficiency and output. Attached Figure Description
[0016] Figure 1 A front view of an extrusion production line for PPS specialty film provided in an embodiment of this application;
[0017] Figure 2 for Figure 1 A top view of the extrusion production line in the middle;
[0018] Figure 3 for Figure 1 A schematic diagram of the extrusion screw of a flat twin extruder.
[0019] The components are as follows: 10. Vacuum feeder; 20. Flat double extruder; 1. Barrel; 2. Extrusion screw; 201. First conveying section; 202. First shearing section; 203. Second conveying section; 204. Second shearing section; 205. Metering section; 21. Mandrel; 22. First threaded block; 23. Second threaded block; 24. Third threaded block; 25. Fourth threaded block; 26. First shearing block; 27. Second shearing block; 30. Extrusion die; 3. Screen changer; 4. Metering pump; 5. Negative pressure air box; 40. Horizontal three-roll calender; 91. First roll; 92. Second roll; 93. Third roll; 94. Guide roll; 50. Cooling roll assembly; 6. Edge trimming device; 7. Waste edge rewinder; 60. Traction machine; 8. Static eliminator; 70. Rewinder; 80. Roller temperature controller; 90. Control cabinet. Detailed Implementation
[0020] To illustrate the technical content, structural features, achieved objectives, and effects of the application in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, structure, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.
[0021] This application provides an extrusion production line for PPS specialty films. This extrusion production line is specifically designed for PPS materials. Compared with traditional PPS film production, the extrusion production line of this application can achieve continuous production of PPS specialty films, greatly improving production efficiency and output.
[0022] like Figure 1 , 2 As shown, the extrusion production line includes a vacuum feeder 10, a flat double extruder 20, an extrusion die 30, a horizontal three-roll calender 40, a cooling roller assembly 50, a traction machine 60, and a winding machine 70 arranged sequentially from upstream to downstream. The vacuum feeder 10 conveys the raw material into the flat double extruder 20, which shears, plasticizes, and melts the raw material. The fully plasticized material is then conveyed to the extrusion die 30, which extrudes the material in the form of a film. The extrusion die 30 is suspended above the horizontal three-roll calender 40. The sheet-like material is extruded and shaped on the horizontal three-roll calender 40. After being cooled by the cooling roller assembly 50, it is wound onto the winding machine 70. The traction machine 60 provides traction force for conveying the film on the extrusion production line.
[0023] like Figure 1 , 3 As shown, the flat double extruder 20 includes a barrel 1 extending in the front-to-back direction and a pair of extrusion screws 2 arranged symmetrically on the left and right. The pair of extrusion screws 2 are installed in the barrel 1 and rotate in the same direction to shear and plasticize the PPS material entering the barrel 1. The extrusion screws 2 are specially designed for PPS material and adopt a high-shear structure, which can better shear and plasticize the PPS material.
[0024] Each extrusion screw 2 includes a mandrel 21 extending in the front-to-back direction, and several threaded blocks and several shearing blocks coaxially sleeved on the mandrel 21 and rotating synchronously with the mandrel 21. The extrusion screw is arranged from front to back as a first conveying section 201, a first shearing section 202, a second conveying section 203, a second shearing section 204, and a metering section 205. The first conveying section 201, the second conveying section 203, and the metering section 205 are each composed of several threaded blocks connected sequentially from front to back and at least a portion of the mandrel 21. The first shearing section 202 and the second shearing section 204 are each composed of several threaded blocks, several shearing blocks, and at least a portion of the mandrel.
[0025] The threaded blocks connected front and rear form a threaded portion in the circumference of the mandrel, and the shearing blocks connected front and rear form a shearing portion in the circumference of the mandrel; the pitch of the threaded portion in the middle part of the first conveying section 201 is greater than the pitch of the threaded portions at the front and rear ends, and the pitch of the threaded portions in the second conveying section 203 and the metering section 205 gradually decreases from front to back; in the first shearing section 202 and the second shearing section 204, the shearing portion and the threaded portion are alternately distributed from front to back, and the thread direction of the last threaded block in each shearing section is opposite to the thread direction of the front threaded block, and the total length of the shearing portion in the second shearing section 204 is greater than the total length of the shearing portion in the first shearing section 202.
[0026] The multiple threaded blocks include a first threaded block 22, a second threaded block 23, a third threaded block 24 and a fourth threaded block 25, and the multiple shearing blocks include a first shearing block 26 and a second shearing block 27.
[0027] The pitch of the first threaded block 22 is greater than the pitch of the second threaded block 23, the pitch of the second threaded block 23 is greater than the pitch of the third threaded block 24, and the thread direction of the fourth threaded block 25 is opposite to that of the first threaded block 22, the second threaded block 23 and the third threaded block 24.
[0028] Each shearing block includes a plurality of shear blades arranged sequentially from front to back. Each shear blade has at least two radially outward protrusions, and the protrusions on each shearing block are arranged in a helical direction from front to back. The helical protrusions on each shearing block can enhance the shearing force on the material inside the barrel 1, and the shearing force on the material varies depending on the structure of the shearing block. The thickness of the shear blades of the first shearing block 26 is greater than the thickness of the shear blades of the second shearing block 27. The structures of the first shearing block 26 and the second shearing block 27 result in the shearing force of the first shearing block 26 being less than the shearing force of the second shearing block 27.
[0029] The extrusion screw 2 is composed of different thread blocks and shear blocks to form a high-shear screw structure, thereby improving the plasticizing effect and plasticizing efficiency of the material.
[0030] The first conveying section 201 includes a third threaded block 24, three first threaded blocks 22, and a second threaded block 23 arranged sequentially from front to back. In the first conveying section 201, the small-pitch threaded section at the beginning feeds the material, the large-pitch threaded section in the middle accelerates the backward conveying speed of the material, and the threaded section at the end with a smaller pitch compresses the material.
[0031] The first shearing section 202 includes a first shearing block 26, a first threaded block 22, a second shearing block 27, a second threaded block 23, a third threaded block 24, a fourth threaded block 25, and a fourth threaded block 25 arranged sequentially from front to back. The material is subjected to mixed shearing by the first shearing block 26 and the second shearing block 27 in the first shearing section 202, and then forward conveyed by the first threaded block 22 and the second threaded block 23. The shearing and threaded sections are arranged alternately to prevent the material from being over-plasticized due to excessive shearing force, thus ensuring the plasticizing effect.
[0032] The second conveying section 203 includes four first threaded blocks 22 and one second threaded block 23 arranged sequentially from front to back, for rapidly conveying the material plasticized in the first shearing section 202 to the second shearing section 204.
[0033] The second shearing section 204 includes, from front to back, a first shearing block 26, a second shearing block 27, a second threaded block 23, a first shearing block 26, a second shearing block 27, a second shearing block 27, a second threaded block 23, a second threaded block 23, a first shearing block 26, a first shearing block 26, and a fourth threaded block 25. The number of second shearing blocks 27 in the second shearing section 204 is greater than the number of second shearing blocks 27 in the first shearing section 202, and the number of first shearing blocks 26 in the second shearing section 204 is greater than the number of first shearing blocks 26 in the first shearing section 202. Therefore, the shearing force of the second shearing section 204 is greater than the shearing force of the first shearing section 202, resulting in more intense shearing of the material, further melting and plasticizing it, thereby improving the plasticizing effect of the material.
[0034] The metering section 205 includes five first threaded blocks 22, two second threaded blocks 23 and two third threaded blocks 24 arranged from front to back. The threaded part of the metering section 205 can stabilize the pressure of the material and convey the material evenly backward.
[0035] Each threaded block and each shearing block is keyed to the mandrel 21 so that the threaded blocks and shearing blocks can be detachably connected to the mandrel 21. When one of the threaded blocks or shearing blocks is worn excessively, it can be replaced individually, reducing maintenance and production costs.
[0036] like Figure 1 , 2As shown, a screen changer 3 and a metering pump 4 are provided between the flat double extruder 20 and the extrusion die 30. The screen changer 3 is used to filter the material to prevent impurities in the material from scratching the rollers of the horizontal three-roll calender 40. The metering pump 4 is used to adjust the flow rate of the material to ensure that the film thickness extruded by the extrusion die 30 is uniform.
[0037] A negative pressure air box 5 is offset on one side of the extrusion die 30. The negative pressure air box 5 is located downstream of the extrusion die 30, and its air outlet is close to the extrusion port of the extrusion die 30. This allows the film extruded by the extrusion die 30 to stick tightly to the rollers of the horizontal three-roll calender 40, preventing the film from shaking and causing uneven thickness.
[0038] The horizontal three-roll calender 40 includes a first roll 91, a second roll 92, and a third roll 93 arranged sequentially from front to back. The first roll 91 is a high-temperature resistant rubber roll, while the second roll 92 and the third roll 93 are both steel rolls. Due to the very small thickness of the film, the first roll 91 and the second roll 92 will collide when pressed together. The rubber roll 91 cushions the impact of the pressing and prevents damage to the first roll 91 and the second roll 92 when pressed together. A guide roll 94 is installed below the first roll 91. The guide roll 94 is in contact with the first roll 91 and is cooled by water to lower the temperature of the first roll 91. The close proximity of the guide roll 94 to the first roll 91 ensures uniform pressure on the first roll 91.
[0039] The horizontal three-roll calender 40 is connected to the roller temperature controller 80, which precisely adjusts the temperature of each roller, enabling the film to be formed quickly in the horizontal three-roll calender 40.
[0040] A trimming device 6 and a waste edge winding machine 70 are also installed at the cooling roller assembly 50. The trimming device 6 is used to cut off the uneven sides of the film, and the waste edge winding machine 70 then winds up and collects the cut sides. An electrostatic eliminator 8 is also installed between the traction machine 60 and the winding machine 70. The electrostatic eliminator 8 is used to eliminate static electricity on the film wound onto the winding machine 70, thereby improving the winding quality.
[0041] A control cabinet 90 is arranged on one side of the flat twin extruder 20. The control cabinet is connected to the power-consuming equipment in the extrusion production line, thereby supplying power to each power-consuming device.
[0042] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.
Claims
1. An extrusion production line for PPS specialty films, comprising, in sequence from upstream to downstream, a vacuum feeder, a flat double extruder, an extrusion die, a horizontal three-roll calender, a cooling roller assembly, a traction machine, and a winding machine, characterized in that, The flat double extruder includes a barrel and a pair of symmetrically arranged extrusion screws. The pair of extrusion screws are rotatably mounted in the barrel. Each extrusion screw includes a mandrel extending in a front-to-back direction and a plurality of threaded blocks and a plurality of shearing blocks coaxially sleeved on the mandrel and rotating synchronously with the mandrel. The extrusion screws are arranged from front to back as a first conveying section, a first shearing section, a second conveying section, a second shearing section, and a metering section. The first conveying section, the second conveying section, and the metering section are each composed of a plurality of threaded blocks connected sequentially from front to back and at least a portion of the mandrel. The first shearing section and the second shearing section are each composed of a plurality of threaded blocks, a plurality of shearing blocks, and at least a portion of the threaded blocks. The system comprises a mandrel; the threaded blocks connected front and rear form threaded portions in the circumference of the mandrel, and the shearing blocks connected front and rear form shearing portions in the circumference of the mandrel; the pitch of the threaded portion in the middle part of the first conveying section is greater than the pitch of the threaded portions at the front and rear ends, and the pitch of the threaded portions in the second conveying section and the metering section gradually decreases from front to back; in the first shearing section and the second shearing section, the shearing portions and the threaded portions are alternately distributed from front to back, and the thread direction of the last threaded block in each shearing section is opposite to the thread direction of the threaded block at the front, and the total length of the shearing portions in the second shearing section is greater than the total length of the shearing portions in the first shearing section.
2. The extrusion production line according to claim 1, characterized in that, Each of the shearing blocks includes a plurality of shear blades arranged sequentially from front to back, each of the shear blades having at least two radially outwardly protruding convex portions, and the convex portions on each of the shearing blocks being arranged in a spiral direction from front to back.
3. The extrusion production line according to claim 2, characterized in that, The plurality of shearing blocks includes a first shearing block and a second shearing block, wherein the thickness of the shearing blade of the first shearing block is greater than the thickness of the shearing blade of the second shearing block.
4. The extrusion production line according to claim 3, characterized in that, The first shear segment and the second shear segment each include a plurality of first shear blocks and a plurality of second shear blocks, wherein the number of second shear blocks in the second shear segment is greater than the number of second shear blocks in the first shear segment, and the number of first shear blocks in the second shear segment is greater than the number of first shear blocks in the first shear segment.
5. The extrusion production line according to claim 1, characterized in that, The plurality of threaded blocks include a first threaded block, a second threaded block, a third threaded block, and a fourth threaded block. The pitch of the first threaded block is greater than the pitch of the second threaded block, the pitch of the second threaded block is greater than the pitch of the third threaded block, and the thread direction of the fourth threaded block is opposite to the thread direction of the first, second, and third threaded blocks.
6. The extrusion production line according to claim 5, characterized in that, The first conveying section includes one third threaded block, multiple first threaded blocks, and one second threaded block arranged sequentially from front to back; the second conveying section includes multiple first threaded blocks and one second threaded block arranged sequentially from front to back; the metering section includes multiple first threaded blocks, multiple second threaded blocks, and multiple third threaded blocks arranged sequentially from front to back.
7. The extrusion production line according to claim 5, characterized in that, The first shearing segment includes a plurality of first threaded blocks, a plurality of second threaded blocks, and a fourth threaded block, wherein the fourth threaded block is located at the tail end of the first shearing segment.
8. The extrusion production line according to claim 5, characterized in that, The second shearing segment includes a plurality of second threaded blocks and a fourth threaded block, the fourth threaded block being located at the tail end of the second shearing segment.
9. The extrusion production line according to claim 1, characterized in that, Each of the aforementioned threaded blocks and each of the aforementioned shearing blocks is connected to the aforementioned mandrel key.
10. The extrusion production line according to claim 1, characterized in that, The horizontal three-roll calender includes a first roll, a second roll, and a third roll arranged sequentially from front to back. The first roll is a rubber roll, and the second and third rolls are both steel rolls.