Extrusion equipment for the production of flame-retardant polystyrene

Abstract

This utility model discloses an extrusion device for producing flame-retardant polystyrene, relating to plastic processing; generally belonging to the technical field of processing substances in a plastic state. The extrusion device for producing flame-retardant polystyrene includes a worktable, with an extruder housing fixedly connected to the upper side of the worktable. A discharge pipe is fixedly connected to the front side of the extruder housing. Two gears are installed on the rear side of the extruder housing, with drive shafts fixedly connected to the front of each gear. Extrusion screws are fixedly connected to the front ends of each drive shaft. A feed hopper is fixedly connected to the upper side of the extruder housing. A scraping mechanism is installed inside the feed hopper, which automatically scrapes and cleans the flame-retardant polystyrene material adhering to the inner wall of the feed hopper during use, thereby ensuring that the feed channel of the feed hopper remains unobstructed, thus improving the feeding speed, accelerating the production process, and preventing the material from deteriorating due to prolonged retention.

Description

Technical Field

[0001] This utility model relates to the processing of plastics; it is generally in the field of processing technology of substances in a plastic state, specifically an extrusion device for the production of flame-retardant polystyrene. Background Technology

[0002] Flame-retardant polystyrene is a polymer material made by adding flame retardants or modifying ordinary polystyrene to enable it to inhibit combustion and delay the spread of flames. The core is to solve the flammability defect of ordinary polystyrene while retaining its lightweight, insulating and easy-to-process characteristics. In the industrial production of flame-retardant polystyrene products, extrusion molding is one of the core processing technologies, which relies on extrusion equipment to heat and plasticize the material, extrude and transport it and shape it.

[0003] The extrusion equipment used in the production of flame-retardant polystyrene is mainly the twin-screw extruder, which plays a crucial role in the production process. During storage and delivery, flame-retardant polystyrene materials are prone to becoming sticky due to changes in humidity and temperature. When the material enters the extruder housing through the feed hopper, some of it adheres to the inner wall of the feed hopper. Over time, this accumulation forms a material buildup, which not only narrows the feed channel and reduces feeding efficiency, leading to unstable material supply within the extruder housing, but may also deteriorate due to long-term retention of the accumulated material, affecting the flame-retardant properties and physical characteristics of the final product. This becomes a key issue restricting production efficiency and product quality. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide an extrusion equipment for the production of flame-retardant polystyrene, which has the function of automatically scraping and cleaning the flame-retardant polystyrene material adhering to the inner wall of the feed hopper during use, thereby ensuring that the feed channel of the feed hopper is always unobstructed, thereby improving the feeding speed, speeding up the production process, and also avoiding the situation where the material is retained for a long time and deteriorates.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an extrusion device for producing flame-retardant polystyrene, including a worktable, a support leg fixedly connected to the lower side of the worktable, an extruder housing fixedly connected to the upper side of the worktable, and a discharge pipe fixedly connected to the front side of the extruder housing, the discharge pipe being connected to the interior of the extruder housing. Heating blocks are fixedly connected to both the left and right sides of the extruder housing. The heating blocks can heat the material inside the extruder housing. Two gears are installed on the rear side of the extruder housing. The two gears are arranged vertically and mesh with each other. Both gears are fixedly connected to the front side of a drive shaft, and the front side of the two drive shafts extends rotatably into the interior of the extruder housing. Both drive shafts are fixedly connected to the front end of an extrusion screw. A feed hopper is fixedly connected to the upper side of the extruder housing. The inside of the feed hopper is connected to the inside of the extruder housing. A scraping mechanism is provided inside the feed hopper, which can scrape the material attached to the inner wall of the feed hopper. The scraping mechanism includes a first connecting ring groove, a first connecting ring, a second connecting ring groove, a second connecting ring, two cleaning scrapers, a transmission ring groove, a bevel gear ring, a connecting block, a second motor assembly, and a bevel gear.

[0006] Preferably, a support block is fixedly connected to the upper side of the workbench, and a first motor assembly is fixedly connected to the upper side of the support block. The output shaft of the first motor assembly is fixedly connected to the upper gear.

[0007] Preferably, the first connecting ring groove is formed on the inner wall of the feed hopper, and the first connecting ring is rotatably connected inside the first connecting ring groove; The second connecting ring groove is formed on the inner wall of the feed hopper, and the second connecting ring groove is located below the first connecting ring groove; The second connecting ring is rotatably connected inside the second connecting ring groove, and both cleaning scrapers are set inside the feed hopper.

[0008] Preferably, the two cleaning scrapers are arranged symmetrically front to back, and the sides of the two cleaning scrapers that are far apart from each other are in contact with the inner wall of the feed hopper; The two cleaning scrapers are fixedly connected to the inner surfaces of the first and second connecting rings on opposite sides, and the transmission ring groove is opened inside the feed hopper.

[0009] Preferably, the transmission ring groove is located at the lower side of the first connecting ring groove, and the interior of the transmission ring groove is connected to the interior of the first connecting ring groove; The bevel gear ring is fixedly connected to the lower side of the first connecting ring, and the lower side of the bevel gear ring extends into the interior of the transmission ring groove; The connecting block is fixedly connected to the front side of the outer surface of the feed hopper, and the second motor assembly is fixedly connected to the front side of the connecting block.

[0010] Preferably, the output shaft of the second motor assembly rotates through the connecting block and extends into the interior of the transmission ring groove. The bevel gear is fixedly connected to the rear end of the output shaft of the second motor assembly, and the bevel gear meshes with the bevel gear ring.

[0011] Preferably, both cleaning scrapers are replaced with triangular shapes, and the cross-section of the two cleaning scrapers is an isosceles triangle. The base of the cleaning scraper is fixedly connected to the inner surface of the first connecting ring and the second connecting ring. One side of the cleaning scraper near the inner wall of the feed hopper forms a cleaning edge, and this cleaning edge is in contact with the inner wall of the feed hopper. The other side of the cleaning scraper away from the inner wall of the feed hopper is set towards the material flow direction inside the feed hopper.

[0012] Preferably, the outer surface of the discharge pipe is wrapped with an annular cooling sleeve, the interior of which has a closed water flow channel. The outer side of the annular cooling sleeve is connected to an inlet pipe and an outlet pipe, both of which are connected to the water flow channel. Switch valves are installed on the inlet pipe and the outlet pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) The extrusion equipment for producing flame-retardant polystyrene automatically scrapes and cleans the flame-retardant polystyrene material adhering to the inner wall of the feed hopper during use, thereby ensuring that the feed channel of the feed hopper is always unobstructed, thus improving the feeding speed, accelerating the production process, and also avoiding the situation where the material is stagnant for a long time and deteriorates.

[0014] (2) The automatic cleaning mechanism of the extrusion equipment for producing flame-retardant polystyrene eliminates the need for operators to directly contact the inside of the feed hopper for cleaning, reducing the risk of manual operation and improving the safety of the production process. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of an extrusion equipment for producing flame-retardant polystyrene according to this utility model; Figure 2 This is a schematic diagram of the cross-sectional connection structure of the extruder housing of this utility model; Figure 3 This is a schematic diagram of the cross-sectional connection structure of the feed hopper of this utility model; Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a schematic diagram of the connection structure at the cleaning scraper of this utility model; Figure 6 This is a schematic diagram of the connection structure at the discharge pipe of this utility model.

[0016] Reference numerals: 1. Workbench; 2. Support leg; 3. Extruder housing; 4. Discharge pipe; 5. Heating block; 6. Gear; 7. Drive shaft; 8. Extrusion screw; 9. Support block; 10. First motor assembly; 11. Feed hopper; 12. First connecting ring groove; 13. First connecting ring; 14. Second connecting ring groove; 15. Second connecting ring; 16. Cleaning scraper; 17. Drive ring groove; 18. Bevel gear ring; 19. Connecting block; 20. Second motor assembly; 21. Bevel gear. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Please see Figure 1-6This utility model provides a new technical solution: an extrusion device for producing flame-retardant polystyrene, including a worktable 1, a support leg 2 fixedly connected to the lower side of the worktable 1, an extruder housing 3 fixedly connected to the upper side of the worktable 1, a discharge pipe 4 fixedly connected to the front side of the extruder housing 3, the discharge pipe 4 communicating with the interior of the extruder housing 3, heating blocks 5 fixedly connected to both the left and right sides of the extruder housing 3, the heating blocks 5 can heat the material inside the extruder housing 3, two gears 6 are installed on the rear side of the extruder housing 3, the two gears 6 are arranged vertically and mesh with each other, and a drive shaft 7 is fixedly connected to the front side of each of the two gears 6, the front side of the two drive shafts 7 rotatably extends into the interior of the extruder housing 3, the two... The front end of the drive shaft 7 is fixedly connected to the extrusion screw 8. The upper side of the worktable 1 is fixedly connected to the support block 9. The upper side of the support block 9 is fixedly connected to the first motor assembly 10. The output shaft of the first motor assembly 10 is fixedly connected to the upper gear 6. The upper side of the extruder housing 3 is fixedly connected to the feed hopper 11. The inside of the feed hopper 11 is connected to the inside of the extruder housing 3. The inside of the feed hopper 11 is equipped with a scraping mechanism. The scraping mechanism can scrape the material attached to the inner wall of the feed hopper 11. The scraping mechanism includes a first connecting ring groove 12, a first connecting ring 13, a second connecting ring groove 14, a second connecting ring 15, two cleaning scrapers 16, a transmission ring groove 17, a bevel gear ring 18, a connecting block 19, a second motor assembly 20, and a bevel gear 21.

[0022] The first connecting ring groove 12 is formed on the inner wall of the feed hopper 11. The first connecting ring 13 is rotatably connected inside the first connecting ring groove 12. The second connecting ring groove 14 is formed on the inner wall of the feed hopper 11 and is located below the first connecting ring groove 12. The second connecting ring 15 is rotatably connected inside the second connecting ring groove 14. Two cleaning scrapers 16 are both set inside the feed hopper 11. The two cleaning scrapers 16 are arranged symmetrically front and back. The sides of the two cleaning scrapers 16 that are far apart from each other are in contact with the inner wall of the feed hopper 11. The sides of the two cleaning scrapers 16 that are far apart from each other are fixedly connected to the inner surfaces of the first connecting ring 13 and the second connecting ring 15. The transmission ring groove 17 is formed in the feed hopper 11. Inside the hopper 11, a transmission ring groove 17 is located below the first connecting ring groove 12, and the interior of the transmission ring groove 17 is connected to the interior of the first connecting ring groove 12. A bevel ring 18 is fixedly connected to the lower side of the first connecting ring 13, and the lower side of the bevel ring 18 extends into the interior of the transmission ring groove 17. A connecting block 19 is fixedly connected to the front side of the outer surface of the feed hopper 11. A second motor assembly 20 is fixedly connected to the front side of the connecting block 19. The output shaft of the second motor assembly 20 rotates through the connecting block 19 and extends into the interior of the transmission ring groove 17. A bevel gear 21 is fixedly connected to the rear end of the output shaft of the second motor assembly 20, and the bevel gear 21 meshes with the bevel ring 18.

[0023] Workbench 1: Provides a stable support platform for the entire extrusion equipment. It is the foundation for the installation of various components of the equipment and ensures that the equipment remains stable during operation without shaking or displacement.

[0024] Support leg 2: Fixed to the lower side of workbench 1, it supports the workbench, makes the equipment stable, ensures stable operation of the equipment on a horizontal surface, and avoids the equipment tilting due to uneven ground, which would affect normal operation.

[0025] Extruder housing 3: Fixedly installed on the upper side of workbench 1, it is the core container for the extrusion processing of flame-retardant polystyrene materials, in which the materials complete the main processes such as heating, plasticizing and extrusion.

[0026] Discharge pipe 4: Fixedly connected to the front side of the extruder housing 3, and internally connected to the interior of the extruder housing 3. It is the outlet for the extruded material, guiding the material extruded by the extrusion screw 8 out of the equipment, thus completing the entire extrusion process.

[0027] Heating blocks 5: Installed on the left and right sides of the extruder housing 3, they begin working after startup to heat the flame-retardant polystyrene material inside the extruder housing 3. Through continuous heating, the material reaches a suitable temperature and flow state for extrusion, preparing it for subsequent extrusion processes and ensuring that the material can be successfully extruded and molded.

[0028] Gear 6: Two gears 6 are arranged vertically and mesh with each other. The upper gear 6 is driven to rotate by the output shaft of the first motor assembly 10, which in turn drives the lower gear 6 to rotate. Gear transmission has the advantages of accurate transmission ratio, high transmission efficiency, and compact structure, and can accurately transmit the power of the motor to the transmission shaft 7.

[0029] Drive shafts 7: Two drive shafts 7 are fixed to the front sides of the two gears 6 respectively, and extend rotatably into the interior of the extruder housing 3. Their function is to transmit the rotation of the gears 6 to the extrusion screw 8, realizing the transmission and conversion of power.

[0030] Extrusion screw 8: Fixed to the front end of drive shaft 7, it starts to rotate under the drive of drive shaft 7. The rotating extrusion screw 8 exerts a squeezing and pushing effect on the heated flame-retardant polystyrene material inside the extruder housing 3, and extrudes the material from the discharge pipe 4 fixedly connected to the front side of the extruder housing 3, thereby realizing the extrusion molding of the material and obtaining the desired flame-retardant polystyrene product.

[0031] Support block 9: Fixed on the upper side of the workbench 1, it provides support and fixation for the first motor assembly 10, ensuring the stability of the first motor assembly 10 during operation and avoiding the transmission effect caused by motor vibration.

[0032] The first motor assembly 10 is fixed on the support block 9. After startup, its output shaft drives the upper gear 6 to rotate. It is the power source for the rotation of the extrusion screw 8, providing power for the extrusion of materials and ensuring that the extrusion process can proceed continuously and stably.

[0033] Feed hopper 11: Fixedly connected to the upper side of the extruder housing 3, and internally connected to the interior of the extruder housing 3. Its function is to serve as a material feeding port, facilitating operators to feed flame-retardant polystyrene material into the equipment, allowing the material to smoothly enter the extruder housing 3 for subsequent processing.

[0034] First connecting ring groove 12: It is formed on the inner wall of the feed hopper 11 to provide a rotation track for the first connecting ring 13, so that the first connecting ring 13 can rotate stably inside it, thereby realizing the circumferential motion of the cleaning scraper 16.

[0035] First connecting ring 13: Rotatably connected inside the first connecting ring groove 12, it drives the cleaning scraper 16 to rotate under the drive of the second motor assembly 20, and is one of the important transmission components of the cleaning mechanism.

[0036] The second connecting ring groove 14 is formed on the inner wall of the feed hopper 11, located below the first connecting ring groove 12. It provides a rotation track for the second connecting ring 15, ensuring the stable rotation of the second connecting ring 15 and assisting the movement of the cleaning scraper 16.

[0037] The second connecting ring 15 is rotatably connected inside the second connecting ring groove 14 and works together with the first connecting ring 13 to fix the cleaning scraper 16, so that the cleaning scraper 16 can stably make a circular motion on the inner wall of the feed hopper 11.

[0038] Cleaning scraper 16: Two cleaning scraper blocks 16 are symmetrically arranged front and back, with their opposite sides both in contact with the inner wall of the feed hopper 11. These opposite sides are also fixedly connected to the inner surfaces of the first connecting ring 13 and the second connecting ring 15. When the first connecting ring 13 rotates, the cleaning scraper blocks 16 move in a circular motion along the inner wall of the feed hopper 11, scraping and cleaning the material adhering to the inner wall of the feed hopper 11 to prevent material accumulation from affecting the feeding speed and the normal operation of the equipment.

[0039] Transmission ring groove 17: It is formed inside the feed hopper 11, located below the first connecting ring groove 12, and its interior is connected to the interior of the first connecting ring groove 12. It provides space for the meshing transmission of the bevel gear ring 18 and the bevel gear 21, so that the power of the second motor assembly 20 can be transmitted to the first connecting ring 13.

[0040] Bevel ring 18: Fixedly connected to the lower side of the first connecting ring 13, with its lower side extending into the interior of the transmission ring groove 17. It meshes with the bevel gear 21 and rotates under the drive of the bevel gear 21, thereby driving the first connecting ring 13 to rotate, realizing the transmission of power and steering.

[0041] Connecting block 19: It is fixedly connected to the front side of the outer surface of the feed hopper 11, providing support and fixation for the second motor assembly 20, and ensuring the stability of the second motor assembly 20 during operation.

[0042] The second motor assembly 20 is fixedly connected to the front side of the connecting block 19. After startup, its output shaft rotates through the connecting block 19 and extends into the transmission ring groove 17. The bevel gear 21 fixed at the rear end of the output shaft meshes with the bevel gear ring 18. It is the power source of the cleaning mechanism, providing power for the rotation of the cleaning scraper 16 to achieve automatic cleaning of the inner wall of the feed hopper 11.

[0043] Bevel gear 21: Fixedly connected to the rear end of the output shaft of the second motor assembly 20, and meshing with the bevel gear ring 18. Driven by the second motor assembly 20, the bevel gear 21 drives the bevel gear ring 18 to rotate, thereby transmitting the power of the second motor assembly 20 to the first connecting ring 13 and activating the cleaning mechanism.

[0044] Furthermore, at the start of operation, the workbench 1 provides a stable support platform for the entire extrusion equipment, with fixed support legs 2 ensuring stable placement. The extruder housing 3 is fixedly installed on the upper side of the workbench 1; this is the core container for extruding flame-retardant polystyrene materials. The equipment is connected to the power supply, and the overall control system is activated, putting the equipment into standby mode. The flame-retardant polystyrene material is fed into the equipment through the feed hopper 11 fixedly connected to the upper side of the extruder housing 3. The feed hopper 11 is connected to the interior of the extruder housing 3, allowing the material to smoothly enter. The heating blocks 5 on both sides of the extruder housing 3 are activated, heating the flame-retardant polystyrene material inside the extruder housing 3. Through continuous heating, the material reaches a suitable temperature and flow state for extrusion, preparing it for subsequent extrusion processes.

[0045] The first motor assembly 10, fixed on the upper support block 9 of the worktable 1, is activated, and the output shaft of the first motor assembly 10 drives the upper gear 6 to rotate. Because the two gears 6 are arranged vertically and mesh with each other, the lower gear 6 also rotates. The drive shaft 7, fixed to the front of the two gears 6, rotates and extends into the extruder housing 3. The extrusion screw 8, fixed to the front end of the drive shaft 7, begins to rotate under the drive of the drive shaft. The rotating extrusion screw 8 exerts a squeezing and pushing effect on the heated flame-retardant polystyrene material inside the extruder housing 3, extruding the material from the discharge pipe 4 fixedly connected to the front of the extruder housing 3, thereby realizing the extrusion molding of the material and obtaining the desired flame-retardant polystyrene product.

[0046] When material adheres to the inner wall of the feed hopper 11, the second motor assembly 20 fixed on the connecting block 19 on the outer side of the feed hopper 11 is activated. The output shaft of the second motor assembly 20 rotates through the connecting block 19 and extends into the transmission ring groove 17 opened inside the feed hopper 11. The bevel gear 21 fixed at the rear end of the output shaft meshes with the bevel tooth ring 18 fixedly connected to the lower side of the first connecting ring 13 and extending into the transmission ring groove 17. Driven by the second motor assembly 20, the bevel gear 21 drives the bevel tooth ring 18 to rotate, thereby driving the first connecting ring 13 to rotate within the first connecting ring groove 12 opened on the inner wall of the feed hopper 11.

[0047] Meanwhile, since the two cleaning scrapers 16 are both in contact with the inner wall of the feed hopper 11 on their respective sides, and these sides are also fixedly connected to the inner surfaces of the first connecting ring 13 and the second connecting ring 15, and the second connecting ring 15 is rotatably connected to the second connecting ring groove 14 located below the first connecting ring groove 12 on the inner wall of the feed hopper 11, when the first connecting ring 13 rotates, it will drive the two cleaning scrapers 16 to make a circular motion on the inner wall of the feed hopper 11, scraping and cleaning the material attached to the inner wall of the feed hopper 11, preventing material accumulation from affecting the feeding.

[0048] Example 1: Replace the flat cleaning scraper 16 with a triangular cleaning scraper with an isosceles triangular cross-section. Please see Figure 5 After being replaced with an isosceles triangular cleaning scraper, the base of the triangle is fixed to the inner surface of the first connecting ring 13 and the second connecting ring 15. One side of the triangle, close to the inner wall of the feed hopper 11, serves as the cleaning side and adheres to the inner wall, while the other side faces the material flow direction. When the second motor assembly 20 is started, it drives the first connecting ring 13 to rotate through the bevel gear 21 and the bevel gear ring 18. This will simultaneously drive the isosceles triangular cleaning scraper 16 to make a circular motion along the inner wall of the feed hopper 11. The cleaning side scrapes off the material attached to the inner wall, while the side facing the flow direction contacts the falling material, pushing the residual material on the side of the cleaning scraper 16. After replacement, the isosceles triangular cleaning scraper 16 moves, resulting in better bidirectional flow and evenly pushing residual material from the sides of the cleaning scraper 16, preventing material residue from remaining on the cleaning scraper 16; the cleaning edge is subjected to uniform force, the wear rate is reduced, and the service life is increased.

[0049] Example 2: Wrap an annular cooling jacket with water flow channels around the outer surface of the discharge pipe 4. Please see Figure 6 After being replaced with an external cooling jacket, the cooling jacket is connected to the workshop cooling water system through an inlet pipe and an outlet pipe, and the water flow rate is adjustable. When the flame-retardant polystyrene material is extruded from the outlet pipe 4, the cooling water flowing inside the cooling jacket will absorb the heat from the outlet pipe wall, thereby reducing the temperature of the material inside the pipe. After replacing the ring cooling jacket, the product can be quickly shaped after extrusion; the probability of the profile bending due to its own weight is reduced, improving the appearance and dimensional accuracy of the product; the water flow speed can be adjusted to adapt to the production of profiles of different thicknesses, increasing the applicability of the equipment, and multiple specifications of products can be produced without changing the discharge pipe.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An extrusion device for producing flame-retardant polystyrene, comprising a workbench (1), a support leg (2) fixedly connected to the lower side of the workbench (1), an extruder housing (3) fixedly connected to the upper side of the workbench (1), a discharge pipe (4) fixedly connected to the front side of the extruder housing (3), and the discharge pipe (4) communicating with the interior of the extruder housing (3). Heating blocks (5) are fixedly connected to both the left and right sides of the extruder housing (3). Two gears (6) are installed on the rear side of the extruder housing (3). The two gears (6) are arranged vertically and mesh with each other. The front sides of the two gears (6) are fixedly connected to the drive shafts (7), and the front sides of the two drive shafts (7) extend into the interior of the extruder housing (3). The front ends of the two drive shafts (7) are fixedly connected to the extrusion screws (8). The upper side of the extruder box (3) is fixedly connected with a feeding hopper (11), the inside of the feeding hopper (11) is communicated with the inside of the extruder box (3), characterized in that: The feed hopper (11) is equipped with a scraping mechanism inside, which can scrape the material attached to the inner wall of the feed hopper (11); The scraping mechanism includes a first connecting ring groove (12), a first connecting ring (13), a second connecting ring groove (14), a second connecting ring (15), two cleaning scrapers (16), a transmission ring groove (17), a bevel ring (18), a connecting block (19), a second motor assembly (20), and a bevel gear (21).

2. An extrusion equipment for producing flame retardant polystyrene according to claim 1, characterized in that: The upper side of the workbench (1) is fixedly connected to a support block (9), and the upper side of the support block (9) is fixedly connected to a first motor assembly (10). The output shaft of the first motor assembly (10) is fixedly connected to the upper gear (6).

3. An extrusion equipment for producing flame retardant polystyrene as claimed in claim 1, wherein: The first connecting ring groove (12) is formed on the inner wall of the feed hopper (11), and the first connecting ring (13) is rotatably connected inside the first connecting ring groove (12); The second connecting ring groove (14) is opened on the inner wall of the feed hopper (11), and the second connecting ring groove (14) is located at the lower side of the first connecting ring groove (12); The second connecting ring (15) is rotatably connected inside the second connecting ring groove (14), and the two cleaning scrapers (16) are both set inside the feed hopper (11).

4. An extrusion apparatus for the production of flame retarded polystyrene according to claim 3, characterized in that The two cleaning scrapers (16) are arranged symmetrically in front and behind, and the sides of the two cleaning scrapers (16) that are far apart from each other are in contact with the inner wall of the feed hopper (11); The two cleaning scrapers (16) are fixedly connected to the inner surfaces of the first connecting ring (13) and the second connecting ring (15) on the side away from each other, and the transmission ring groove (17) is opened inside the feed hopper (11).

5. An extrusion apparatus for the production of flame retarded polystyrene according to claim 4, characterized in that The transmission ring groove (17) is located on the lower side of the first connecting ring groove (12), and the interior of the transmission ring groove (17) is connected to the interior of the first connecting ring groove (12). The bevel ring (18) is fixedly connected to the lower side of the first connecting ring (13), and the lower side of the bevel ring (18) extends into the interior of the transmission ring groove (17); The connecting block (19) is fixedly connected to the front side of the outer surface of the feed hopper (11), and the second motor assembly (20) is fixedly connected to the front side of the connecting block (19).

6. An extrusion apparatus for the production of flame retarded polystyrene according to claim 5, characterized in that The output shaft of the second motor assembly (20) rotates through the connecting block (19) and extends into the interior of the transmission ring groove (17). The bevel gear (21) is fixedly connected to the rear end of the output shaft of the second motor assembly (20), and the bevel gear (21) meshes with the bevel ring (18).

7. An extrusion equipment for producing flame retardant polystyrene as claimed in claim 3 wherein: Both cleaning scrapers (16) are replaced with triangular shapes, and the cross-section of the two cleaning scrapers (16) is an isosceles triangle.

8. An extrusion equipment for producing flame retardant polystyrene as claimed in claim 1, wherein: The outer surface of the discharge pipe (4) is covered with an annular cooling jacket.

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