A devolatilization extruder for fluoroplastic processing

Abstract

The application discloses a devolatilization extruder for fluoroplastic processing and belongs to the technical field of fluoroplastic production, which comprises an extrusion chamber and a forming die cavity for forming PVDF bars, a feeding hopper is arranged above the feeding end of the extrusion chamber, and a driving motor is arranged on the feeding end of the extrusion chamber. The high-pressure gas pump and the gas acceleration cavity are arranged, a high-speed airflow ring is generated by using Bernoulli effect, discrete cooling water mist is actively adsorbed to the surface of the bar, water flow impact deformation is avoided, the water mist is uniformly distributed in the back-shaped cooling cover, the synchronous and uniform cooling of the multiple bars is realized, local thermal stress is eliminated, the non-contact gas mist cooling technology is realized, the detection air ring and the arc detection assembly are arranged, the detection air ring is used for driving the detection arc plate to slide and contact the surface of the bar, the inductive extension rod is used for realizing real-time identification of slight deformation or defects through pressure change, the flexible rubber ring is used for protecting the surface of the bar and avoiding detection damage, an instant alarm mechanism is used for shortening fault response time and reducing the waste rate.

Description

Technical Field

[0001] This invention relates to the field of fluoroplastics production technology, and in particular to a devolatilization extruder for fluoroplastics processing. Background Technology

[0002] Fluoroplastics are plastics made from fluoropolymers. PVDF rods are made by extruding PVDF resin into rods at high temperatures. They are a type of fluoroplastic and are mainly used in electronics, electrical engineering, new energy, petrochemicals, and semiconductor industries.

[0003] Currently, in the production of PVDF rods, the extrusion temperature is over 200 degrees Celsius, so water cooling is required on the surface of the rods during extrusion. However, after the PVDF resin material is hot-melt extruded into the molding die in the extruder, several rods are usually extruded simultaneously according to production needs. Water cooling at this time will result in the lower rods and the bottom of the rods not receiving adequate water cooling, leading to uneven cooling of the rods and making them prone to deformation. At the same time, if the impact force of the water flow is large during the water cooling process, it can also easily cause slight deformation of the freshly extruded rods. Furthermore, since PVDF rods are relatively expensive, it is difficult to observe slight deformations in the rods at the time of production with the naked eye, thus increasing the cost of subsequent remedial processing of the produced PVDF rods. Therefore, a devolatilization extruder for fluoroplastic processing is proposed. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of poor water cooling effect and difficulty in observing the small deformation of the rods after extrusion when multiple PVDF rods are extruded at the same time in the prior art, and to propose a devolatilization extruder for fluoroplastic processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A devolatilization extruder for fluoroplastic processing includes an extrusion chamber and a forming die cavity for forming PVDF rods. A feed hopper is provided above the feed end of the extrusion chamber, and a drive motor is provided at the feed end of the extrusion chamber. The output end of the drive motor is connected to two helical extrusion blades through a gear assembly. A cooling chamber is fixedly connected to the rear end of the forming die cavity, and a U-shaped cooling cover for dispersing cooling water mist is connected to the inner side wall of the cooling chamber. Two gas acceleration chambers are provided on one side of the cooling chamber. Each gas acceleration chamber consists of two right-angled chambers, one above the other. A high-pressure air pump is connected to the top of each gas acceleration chamber via a sealing plate. The inner walls of both the upper and lower right-angled chambers are connected to detection air rings via right-angled fixing rods. Multiple arc measuring components for detecting the surface smoothness of PVDF rods are connected to the inner walls of the detection air rings.

[0006] Preferably, the gear assembly consists of a drive gear, a main gear, and a secondary gear, which mesh with each other in sequence. The output end of the drive motor is fixedly connected to the end of the drive gear via a drive shaft, and the two outer side walls of the extrusion chamber are fixedly connected to a planar base via multiple supports.

[0007] Preferably, the ends of the main gear and the auxiliary gear are fixedly connected to the inner wall of the spiral extrusion blade via a rotating shaft, the side wall of the spiral extrusion blade is rotatably connected to the inner wall of the extrusion chamber, the top of the planar base is fixedly connected to the bottom of the cooling chamber via a drainage seat, and multiple drainage holes are provided on both sides of the drainage seat.

[0008] Preferably, the left and right side walls and the upper side wall of the cooling chamber are all fixedly connected to a fogging machine for generating cooling water mist, and the front end of the cooling chamber is fixedly connected to the end of the molding cavity.

[0009] Preferably, a docking plate is fixedly connected to the rear end of the cooling chamber. The docking plate has multiple docking holes corresponding to the positions of the extrusion ports on the molding cavity. The inner diameter of the docking holes is slightly larger than the diameter of the PVDF rod.

[0010] Preferably, the sidewall of the docking plate at the docking hole is connected to a pressure bucket via multiple shaping rings, and the wide end of the pressure bucket is fixedly connected to the lower end of the gas acceleration chamber.

[0011] Preferably, the top end of the gas acceleration chamber is fixedly connected to the bottom end of the sealing plate, and the high-pressure gas pump is connected to the upper right-angle chamber and the lower right-angle chamber of the gas acceleration chamber through multiple branch pipes respectively. The upper right-angle chamber and the lower right-angle chamber of the gas acceleration chamber are respectively provided with one through rod hole and two through rod holes, and rubber rings are fixedly connected to the inner sidewalls of the multiple through rod holes.

[0012] Preferably, the arc measuring component consists of an inductive telescopic rod and a detection arc plate. The outer wall of the detection arc plate is fixedly connected to the inner wall of the detection air ring through the inductive telescopic rod. A pressure sensor is installed inside the inductive telescopic rod, and multiple detection arc plates are evenly arranged in a ring array.

[0013] Preferably, the outer wall of the detection air ring is fixedly connected with a plurality of wind pressure fan blades arranged in a ring array, and annular sliding grooves are provided on both ends of the detection air ring. The upper right-angle chamber and the lower right-angle chamber of the gas acceleration chamber are slidably connected to the inner wall of the annular sliding grooves on the two detection air rings by a plurality of right-angle fixing rods.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This solution utilizes a high-pressure air pump and a gas acceleration chamber to generate a high-speed airflow ring using the Bernoulli effect. This ring actively adsorbs discrete cooling water mist onto the surface of the bar, preventing water flow impact and deformation. The U-shaped cooling hood evenly distributes the water mist, enabling simultaneous and uniform cooling of multiple bars, eliminating local thermal stress, and achieving non-contact air mist cooling technology.

[0015] 2. This solution, through the setting of the detection air ring and arc measurement components, can use the detection air ring to drive the detection arc plate to slide in contact with the surface of the bar. By sensing the pressure change of the telescopic rod, it can identify minute deformations or defects in real time. The flexible rubber ring protects the surface of the bar to avoid detection damage, and the instant alarm mechanism shortens the fault response time and reduces the scrap rate.

[0016] 3. This solution, through the setting of a fog generator and a U-shaped cooling hood, can utilize air-mist synergistic cooling, which is more water-saving than traditional water cooling, and the cooling rate is controllable, reducing energy waste. The entire process from extrusion to cooling and testing is controlled in parallel, systematically improving efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a devolatilization extruder for fluoroplastic processing proposed in this invention; Figure 2 This is an assembly diagram of a portion of the structure of a devolatilization extruder for fluoroplastic processing proposed in this invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure of the extrusion chamber in a devolatilization extruder for fluoroplastic processing proposed in this invention; Figure 5 This is a schematic diagram of the location of the spiral cooling shroud in a devolatilization extruder for fluoroplastic processing, as proposed in this invention. Figure 6 This is a schematic diagram showing the positions of the two gas acceleration chambers in a devolatilization extruder for fluoroplastic processing proposed in this invention; Figure 7 This is a schematic diagram of the internal structure of the gas acceleration chamber in a devolatilization extruder for fluoroplastic processing according to the present invention; Figure 8 This is a schematic diagram of the arc measuring component in a devolatilization extruder for fluoroplastic processing proposed in this invention.

[0018] In the diagram: 1. Extrusion chamber; 2. Molding mold cavity; 3. Flat base; 4. Feed hopper; 5. Drive motor; 6. Drive gear; 7. Main gear; 8. Secondary gear; 9. Spiral extrusion blades; 10. Drainage seat; 11. Cooling chamber; 12. Fog generator; 13. U-shaped cooling hood; 14. PVDF rod; 15. Butt joint plate; 16. Shaping ring; 17. Pressure hopper; 18. Gas acceleration chamber; 19. Sealing plate; 20. High-pressure air pump; 21. Rubber ring; 22. Right-angle fixing rod; 23. Detection air ring; 24. Air pressure fan blades; 25. Inductive telescopic rod; 26. Detection arc plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Example, refer to Figures 1 to 8 A devolatilization extruder for fluoroplastic processing includes an extrusion chamber 1 and a forming die 2 for forming PVDF rods 14. A feed hopper 4 is provided above the feed end of the extrusion chamber 1. A drive motor 5 is provided at the feed end of the extrusion chamber 1. The output end of the drive motor 5 is connected to two spiral extrusion blades 9 through a gear assembly. A cooling chamber 11 is fixedly connected to the rear end of the forming die 2. A U-shaped cooling cover 13 for dispersing cooling water mist is connected to the inner side wall of the cooling chamber 11. Furthermore, the gear assembly consists of a drive gear 6, a main gear 7, and a secondary gear 8. The drive gear 6, the main gear 7, and the secondary gear 8 mesh with each other in sequence. The output end of the drive motor 5 is fixedly connected to the end of the drive gear 6 via a drive shaft. The two outer side walls of the extrusion chamber 1 are fixedly connected to a planar base 3 via multiple supports. The ends of the main gear 7 and the secondary gear 8 are fixedly connected to the inner side wall of the spiral extrusion blade 9 via rotating shafts. The side wall of the spiral extrusion blade 9 is rotatably connected to the inner side wall of the extrusion chamber 1. The top of the planar base 3 is fixedly connected to the bottom of the cooling chamber 11 via a drainage seat 10. Multiple drainage holes are provided on both side walls of the drainage seat 10. A fogger 12 for generating cooling water mist is fixedly connected to the left, right, and upper side walls of the cooling chamber 11. The front end of the cooling chamber 11 is fixedly connected to the end of the molding cavity 2. After the cooling water mist cools and condenses into water droplets, it drips into the drainage seat 10 and is collected through multiple drainage holes on the drainage seat 10. It should be noted that: the start drive motor 5 drives the drive gear 6 to rotate through the drive shaft, the drive gear 6 drives the main gear 7 to rotate, the main gear 7 drives the meshing secondary gear 8 to rotate together, thereby driving the two spiral extrusion blades 9 in the extrusion chamber 1 to rotate relative to each other. Then, the raw material for the production of PVDF rods 14 is put into the feed hopper 4, so that after the raw material is heated and melted, it is continuously squeezed by the two spiral extrusion blades 9 and extruded into the molding cavity 2. The molding cavity 2 simultaneously extrudes multiple PVDF rods 14, and at the same time, multiple fog generators 12 are started to generate a large amount of cooling water mist into the U-shaped cooling cover 13. The advantages mentioned above are as follows: a large amount of discrete cooling water mist can be generated at the extrusion end of the forming mold cavity 2 by the loop cooling cover 13, which makes it easier to control the cooling water mist to cool the surface of the PVDF rod 14 that has just been extruded. Two gas acceleration chambers 18 are provided on one side of the cooling chamber 11. Each gas acceleration chamber 18 consists of two right-angled chambers, and a high-pressure air pump 20 is connected to the top of the gas acceleration chamber 18 through a sealing plate 19. Furthermore, a docking plate 15 is fixedly connected to the rear end of the cooling chamber 11. The docking plate 15 has multiple docking holes corresponding to the extrusion port positions on the molding cavity 2. The inner diameter of the docking holes is slightly larger than the diameter of the PVDF rod 14. The side wall of the docking plate 15 at the docking hole is connected to a pressure bucket 17 through multiple shaping rings 16. The coarse end of the pressure bucket 17 is fixedly connected to the lower end of the gas acceleration chamber 18. The top end of the gas acceleration chamber 18 is fixedly connected to the bottom end of the sealing plate 19. The high-pressure air pump 20 is connected to the upper right-angle chamber and the lower right-angle chamber of the gas acceleration chamber 18 through multiple branch pipes. The upper right-angle chamber and the lower right-angle chamber of the gas acceleration chamber 18 have one through-rod hole and two through-rod holes, respectively. Rubber rings 21 are fixedly connected to the inner side walls of the multiple through-rod holes. It should be noted that when cooling the surface of the freshly extruded PVDF rod 14 is required, the high-pressure air pump 20 is activated to introduce high-speed airflow into the upper and lower right-angle chambers of the two gas acceleration chambers 18 through multiple branch pipes. The high-speed airflow is discharged through the pressurizing hopper 17 and the shaping ring 16 onto the annular surface of the PVDF rod 14, thus forming a high-speed airflow ring on the annular surface of the PVDF rod 14. According to Bernoulli's principle, the faster the airflow ring, the lower the pressure at that location, and thus the cooler the PVDF rod 14. The high-speed airflow ring on the annular surface will cause the external air to be pushed towards the position of the airflow ring. When the high-speed airflow ring moves in the loop cooling shroud 13, it will cause the air with cooling water mist to move towards the annular surface of the PVDF rod 14, thereby achieving cooling and shaping on the surface of the PVDF rod 14. Since the extrusion speed of the PVDF rod 14 with a slightly larger diameter is usually relatively slow in order to ensure the molding quality of the PVDF rod 14, the slight lag of the cooling method of the airflow ring constantly impacting in the gas acceleration chamber 18 can be ignored. The advantages mentioned above are as follows: a high-speed airflow ring can be formed on the annular surface of the PVDF rod 14 by using the gas acceleration chamber 18. The rapid movement of the airflow ring reduces the air pressure on the annular surface of the PVDF rod 14, thereby continuously moving the external air containing cooling water mist to the surface of the PVDF rod 14, achieving uniform cooling of multiple PVDF rods 14 simultaneously, and avoiding the impact of water flow on the PVDF rod 14 during cooling. The inner walls of the upper right-angle chamber and the lower right-angle chamber of the gas acceleration chamber 18 are connected to a detection air ring 23 by a right-angle fixing rod 22. The inner wall of the detection air ring 23 is connected to multiple arc measuring components for detecting the surface smoothness of the PVDF rod 14. Furthermore, the arc measuring component consists of an inductive telescopic rod 25 and a detection arc plate 26. The outer wall of the detection arc plate 26 is fixedly connected to the inner wall of the detection air ring 23 through the inductive telescopic rod 25. A pressure sensor is installed inside the inductive telescopic rod 25. Multiple detection arc plates 26 are evenly arranged in a ring array. Multiple wind pressure fan blades 24 arranged in a ring array are fixedly connected to the outer wall of the detection air ring 23. Annular sliding grooves are opened on both ends of the detection air ring 23. The right-angled chamber of the gas acceleration chamber 18 located above and the right-angled chamber located below are slidably connected to the inner wall of the annular sliding groove on the two detection air rings 23 through multiple right-angle fixed rods 22. It should be noted that during the extrusion of multiple PVDF rods 14, they pass through one through-hole and two through-holes in the upper and lower right-angle chambers of the gas acceleration chamber 18. The rubber ring 21 on the inner wall of the through-hole makes flexible contact with the surface of the PVDF rod 14 to prevent damage to the PVDF rod 14 during movement. When the high-pressure air pump 20 generates airflow, the airflow passes through the wind pressure fan blades 24 on the detection air ring 23. The obliquely set wind pressure fan blades 24 are impacted by the airflow and drive the entire detection air ring 23 to rotate on the right-angle fixed rod 22. The rotation of the detection air ring 23 drives multiple detection arc plates 26 to rotate through multiple sensing telescopic rods 25, so that multiple detection arc plates 26 press against the surface of the PVDF rod 14 for contact sliding on the arc surface. If there is deformation or defect on the surface of the PVDF rod 14, the detection arc plate 26 will be displaced in the direction of the sensing telescopic rod 25 at the deformation or defect, which will cause the pressure sensor value on the sensing telescopic rod 25 to change. The advantages mentioned above are: this makes it easier to quickly and timely detect minor deformations and defects on the PVDF rod 14, allowing technicians to promptly check whether the deformation of this section of the PVDF rod 14 is due to an accidental production defect or a problem with the front-end molding process, thus avoiding greater production losses and ensuring the high quality of the produced PVDF rod 14. In use, the drive motor 5 is started to drive the drive gear 6 to rotate via the drive shaft. The drive gear 6 rotates to drive the main gear 7 to rotate, and the main gear 7 rotates to drive the meshing secondary gear 8 to rotate together. This causes the two spiral extrusion blades 9 in the extrusion chamber 1 to rotate relative to each other. Then, the raw material for the production of PVDF rods 14 is put into the feed hopper 4. After the raw material is heated and melted, it is continuously squeezed by the two spiral extrusion blades 9 and extruded into the forming mold cavity 2. Multiple PVDF rods 14 are extruded simultaneously in the forming mold cavity 2. At the same time, multiple fog generators 12 are started to generate a large amount of cooling water mist into the U-shaped cooling hood 13. In this way, a large amount of discrete cooling water mist can be generated at the extrusion end of the forming mold cavity 2 through the U-shaped cooling hood 13, which facilitates the subsequent control of the cooling water mist to cool the surface of the newly extruded PVDF rods 14. When cooling is required on the surface of the freshly extruded PVDF rod 14, the high-pressure air pump 20 is activated, introducing high-speed airflow through multiple branch pipes into the upper and lower right-angle chambers of the two gas acceleration chambers 18. The high-speed airflow is discharged through the pressurizing hopper 17 and the shaping ring 16 onto the annular surface of the PVDF rod 14, thus forming a high-speed airflow ring on the annular surface of the PVDF rod 14. According to Bernoulli's principle, the faster the airflow ring, the lower the pressure at its location. Therefore, the high-speed airflow ring flowing on the annular surface of the PVDF rod 14 will cause the external air to be pushed towards the position of the airflow ring. When the airflow ring moves within the circular cooling shroud 13, it causes the air carrying cooling water mist to move toward the annular surface of the PVDF rod 14, thereby achieving cooling and shaping of the PVDF rod 14 surface. In this way, a high-speed airflow ring can be formed on the annular surface of the PVDF rod 14 using the gas acceleration chamber 18. The rapid movement of the airflow ring reduces the air pressure on the annular surface of the PVDF rod 14, thereby continuously moving the external air carrying cooling water mist toward the surface of the PVDF rod 14, simultaneously achieving uniform cooling of multiple PVDF rods 14, and avoiding the impact of water flow on the PVDF rod 14 during cooling. During the extrusion process of multiple PVDF rods 14, they pass through one through-hole and two through-holes in the upper and lower right-angle chambers of the gas acceleration chamber 18. The rubber ring 21 on the inner wall of the through-hole makes flexible contact with the surface of the PVDF rod 14, preventing damage during movement. When the high-pressure air pump 20 generates airflow, the airflow passes through the wind pressure fan blades 24 on the detection air ring 23. The angled wind pressure fan blades 24, impacted by the airflow, cause the entire detection air ring 23 to rotate on the right-angle fixed rod 22. This rotation of the detection air ring 23, via multiple inductive telescopic rods 25, causes multiple detection arc plates 26 to rotate, pressing against the surface of the PVDF rod 14 for contact sliding on the arc surface. If the surface of the PVDF rod 14 has deformation or defects, the detection arc plates 26 will displace at the deformation or defect location in the direction of the inductive telescopic rod 25, thereby causing… When the pressure sensor reading on the inductive telescopic rod 25 changes, the detection arc plate 26 presses against the surface of the PVDF rod 14 for detection. Therefore, the rotation of the detection air ring 23 is obstructed, and the rotation speed is small. The centrifugal force generated by its rotation is minimal, and its impact on the inductive telescopic rod 25 is within the normal range of fluctuation and can be ignored. Furthermore, the inductive telescopic rod 25, in conjunction with the detection arc plate 26, is used to detect whether there are any abnormal defects in a certain section of the PVDF rod 14. If an abnormality occurs in a continuous section, it is further determined whether it is in the same location, and then it is judged whether it is caused by a process defect. This allows for the rapid and timely detection of minor deformations and defects on the PVDF rod 14. It is convenient for technicians to check whether the deformation of this section of the PVDF rod 14 is due to an accidental production defect or a problem in the front-end molding process, thus avoiding greater production losses and ensuring the high quality of the produced PVDF rod 14.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A devolatilization extruder for fluoroplastic processing, comprising an extrusion chamber (1) and a molding cavity (2) for forming PVDF rods (14), characterized in that, A feeding hopper (4) is provided above the feeding end of the extrusion chamber (1), and a drive motor (5) is provided at the feeding end of the extrusion chamber (1). The output end of the drive motor (5) is connected to two spiral extrusion blades (9) through a gear assembly. A cooling chamber (11) is fixedly connected to the rear end of the molding cavity (2), and a U-shaped cooling cover (13) for diffusing cooling water mist is connected to the inner side wall of the cooling chamber (11). Two gas acceleration chambers (18) are provided on one side of the cooling chamber (11). The gas acceleration chamber (18) is composed of two right-angle chambers, one above the other. A high-pressure air pump (20) is connected to the top of the gas acceleration chamber (18) through a sealing plate (19). The inner walls of the upper right-angle chamber and the lower right-angle chamber of the gas acceleration chamber (18) are connected to a detection air ring (23) through a right-angle fixing rod (22). The inner wall of the detection air ring (23) is connected to multiple arc measuring components for detecting the surface smoothness of the PVDF rod (14). The left and right side walls and the upper side wall of the cooling chamber (11) are fixedly connected to a fog generator (12) for generating cooling water mist. The front end of the cooling chamber (11) is fixedly connected to the end of the molding cavity (2). The arc measuring component consists of an inductive telescopic rod (25) and a detection arc plate (26). The outer side wall of the detection arc plate (26) is fixedly connected to the inner side wall of the detection wind ring (23) through the inductive telescopic rod (25). A pressure sensor is installed inside the inductive telescopic rod (25). Multiple detection arc plates (26) are evenly arranged in a ring array. Multiple wind pressure fan blades (24) arranged in a ring array are fixedly connected to the outer side wall of the detection wind ring (23). Annular sliding grooves are opened on both ends of the detection wind ring (23). The right-angled chamber located above the gas acceleration chamber (18) and the right-angled chamber located below are slidably connected to the inner side wall of the annular sliding groove on the two detection wind rings (23) through multiple right-angle fixed rods (22).

2. The devolatilization extruder for fluoroplastic processing according to claim 1, characterized in that, The gear assembly consists of a drive gear (6), a main gear (7) and a secondary gear (8). The drive gear (6), the main gear (7) and the secondary gear (8) mesh with each other in sequence. The output end of the drive motor (5) is fixedly connected to the end of the drive gear (6) through a drive shaft. The two outer walls of the extrusion chamber (1) are fixedly connected to a planar base (3) through multiple supports.

3. The devolatilization extruder for fluoroplastic processing according to claim 2, characterized in that, The ends of the main gear (7) and the auxiliary gear (8) are fixedly connected to the inner wall of the spiral extrusion blade (9) through a rotating shaft. The side wall of the spiral extrusion blade (9) is rotatably connected to the inner wall of the extrusion chamber (1). The top of the planar base (3) is fixedly connected to the bottom of the cooling chamber (11) through a drain seat (10). Multiple drain holes are provided on both sides of the drain seat (10).

4. The devolatilization extruder for fluoroplastic processing according to claim 1, characterized in that, The cooling chamber (11) is fixedly connected to a docking plate (15) at its rear end. The docking plate (15) has multiple docking holes that correspond to the extrusion positions on the molding cavity (2). The inner diameter of the docking holes is slightly larger than the diameter of the PVDF rod (14).

5. The devolatilization extruder for fluoroplastic processing according to claim 4, characterized in that, The side wall of the docking plate (15) at the docking hole is connected to a pressure bucket (17) by a plurality of shaping rings (16), and the wide end of the pressure bucket (17) is fixedly connected to the lower end of the gas acceleration chamber (18).

6. The devolatilization extruder for fluoroplastic processing according to claim 1, characterized in that, The top end of the gas acceleration chamber (18) is fixedly connected to the bottom end of the sealing plate (19). The high-pressure gas pump (20) is connected to the right-angle chamber located above and the right-angle chamber located below the gas acceleration chamber (18) through multiple branch pipes. The right-angle chamber located above and the right-angle chamber located below the gas acceleration chamber (18) are respectively provided with one through rod hole and two through rod holes. The inner walls of the multiple through rod holes are all fixedly connected with rubber rings (21).

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