Double-screw extruder for plastic production

Abstract

The invention relates to a double-screw extruder for plastic production, and aims to solve the problems of non-uniform material heating, material blockage, unstable production process, poor equipment safety and the like in the prior art. The equipment comprises a base, a speed reducer, a sealed heating seat, an extrusion screw, a motor and other core components, by improving the design of the extrusion screw and the sealed heating seat, uniform heating and extrusion of materials are achieved, and the problems of material bonding and blocking are effectively avoided; the material dredging mechanism is matched with a dredging sliding rod through an incomplete gear, so that materials in the feeding process are effectively dredged, and smooth conveying of the materials is guaranteed; a combing amplitude adjusting mechanism is introduced, the position of an extrusion conical block is flexibly adjusted, and the uniformity and stability of material treatment are ensured; and meanwhile, the safety of the equipment is enhanced through the design of the protection mechanism, material splashing and part damage are avoided, and the use safety and the maintenance efficiency of the equipment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic production, and particularly to a twin-screw extruder for plastic production. Background Art

[0002] A twin-screw extruder is a common device in the plastic processing process and is widely used in processes such as mixing, melting, and extruding plastic particles. This device mainly heats, extrudes, and conveys plastic materials through the relative movement of two parallel screws, thereby realizing the forming and processing of plastics.

[0003] Currently, traditional twin-screw extruders still face some technical problems during the production process, mainly reflected in the following aspects: First, during the heating and extrusion of materials, the uniformity of the materials is poor, and uneven heating or adhesion of the materials inside the equipment often occurs, resulting in poor operation of the equipment or low production efficiency. Second, during the conveying and feeding of materials in traditional twin-screw extruders, there is a problem of material blockage. Especially during the feeding and material conveying processes, some particles are easily stuck, affecting the smoothness and stability of the equipment. Third, the cleaning and maintenance of the equipment in the existing technology are relatively complex. Especially when repairs or component replacements are required, a large amount of time is often needed for disassembly and adjustment, increasing the downtime of the equipment and affecting production efficiency. Finally, the safety protection measures of traditional twin-screw extruders are relatively simple, lacking effective protection mechanisms, and prone to safety hazards such as material splashing or component damage during the production process.

[0004] Therefore, how to solve the problems existing in the material heating, conveying, cleaning, maintenance, and safety protection of twin-screw extruders is the main problem in the current technological development. Existing twin-screw extruders still have many limitations and need technological innovation to improve their working efficiency and safety, reduce downtime, and enhance production capacity. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a twin-screw extruder for plastic production, which solves multiple problems in the prior art by improving key technologies such as extrusion, feeding, dredging, cleaning, and protection, and improves the production efficiency and safety of the equipment.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A twin-screw extruder for plastic production, comprising an extruder structure, the extruder structure comprising a base fixed on the ground, a reducer fixed on one side of the base, a sealing heating seat arranged on the upper surface of the base, a gap left between the sealing heating seat and the reducer, two extrusion screws rotatably installed inside the sealing heating seat, the two extrusion screws are respectively installed on the output ends of the reducer, an extrusion motor is installed on the back of the reducer, a mold base is installed on the front end of the sealing heating seat, a mixing mechanism is installed on the top end of the sealing heating seat close to the reducer, the mixing mechanism comprises a temporary storage barrel, and the temporary storage barrel is connected with the inside of the sealing heating seat; A boss is arranged on the side of the sealing heating seat close to the reducer, the boss is placed between the mixing mechanism and the reducer, and a material dispersing mechanism is installed on the top of the boss, the material dispersing mechanism is used to dredge the material; The material discharging mechanism includes an incomplete gear symmetrically rotating on the top of the boss and a dredging slide rod sliding on both sides of the bottom of the temporary storage barrel, a swing rod is arranged on the front side of the incomplete gear, a U-shaped fork rod is arranged on the front end of the swing rod, the dredging slide rod is horizontally symmetrically arranged, an I-shaped head is arranged on the outer end of the dredging slide rod, the I-shaped head is placed on the outside of the temporary storage barrel, the U-shaped fork rod is clamped on the inner side of the I-shaped head, and the inner side end of the dredging slide rod is placed on the inner side of the temporary storage barrel; A combing material amplitude adjustment mechanism is provided at the front side of the reducer, and the combing material amplitude adjustment mechanism is used to control the activity amplitude of the dredging slide rod; A protective mechanism is provided on the front side of the top of the reducer for sliding and pressing, and the protective mechanism is arranged above the material thinning mechanism and the material combing amplitude adjusting mechanism.

[0007] Furthermore, a slide groove is provided on the upper surface of the boss, a vertical plate is provided on the rear side of the top of the boss, a bidirectional gear rod is slidably installed on the inner side of the slide groove, the bidirectional gear rod is placed between the two incomplete gears, and the bidirectional gear rod is respectively meshed with the two incomplete gears.

[0008] Furthermore, a connecting rod is provided at the rear end of the bidirectional gear rod, the connecting rod passes through the vertical plate, a connecting head is provided at the rear end of the connecting rod, an extrusion pulley is rotatably installed at the rear end of the connecting head, a spring is sleeved on the surface of the connecting rod, and the spring is placed between the vertical plate and the connecting head.

[0009] Furthermore, the combing material amplitude adjustment mechanism includes a power gear mounted on the power gear output shaft and a gear plate rotating on the outer surface of the reducer; The power gear and the toothed disc are meshed with each other, the front surface of the toothed disc is evenly provided with second T-shaped grooves at the outer center of its rotating axis, a sliding block is slidably installed inside the second T-shaped groove, and an extrusion cone block is arranged outside the sliding block.

[0010] Furthermore, the cross section of the extrusion cone block is a right triangle, and the cross-sectional size of the extrusion cone block gradually changes along the direction of the second T-slot, and the extrusion pulley is in contact with the inclined surface of the extrusion cone block.

[0011] Furthermore, an adjusting thread is rotatably installed at the center of the toothed disc surface, a hexagonal head is provided at the end of the adjusting thread, a connecting sleeve is screwed on the surface of the adjusting thread, connecting rods are evenly hinged on the surface of the connecting sleeve, and the ends of multiple connecting rods facing away from the connecting sleeve are respectively hinged on the slider.

[0012] Furthermore, a stirring motor is fixed on the top of the temporary storage barrel, a stirring rod is installed downward at the output end of the stirring motor, a stirring paddle is provided on the surface of the stirring rod, a feeding auger is installed at the bottom of the stirring rod, and the feeding auger is placed between the temporary storage barrel and the sealed heating seat.

[0013] Furthermore, a receiving groove is provided at the top of the reducer, a first T-shaped groove is provided at the center of the surface of the receiving groove, and the protective mechanism includes a protective top plate sliding on the inner side of the receiving groove, and the protective top plate extends forward.

[0014] Furthermore, an extrusion bolt is screwed through the rear end of the protective top plate, a docking block is slidably installed inside the first T-slot, and the end of the extrusion bolt is screwed on the docking block.

[0015] The present invention provides a twin-screw extruder for plastic production, which has the following beneficial effects: First, in response to the common problems of uneven heating and material clogging in the traditional twin-screw extruder during material heating and extrusion, the present invention improves the design of the sealed heating seat and the installation method of the extrusion screw to ensure that the material is evenly heated and extruded during the entire extrusion process. The two extrusion screws in the sealed heating seat use the power output by the reducer to effectively heat and compress the material, avoiding the problems of material adhesion and equipment clogging caused by uneven heating in the prior art. In addition, the precise molding design of the mold base makes the material more stable during the molding process and improves production efficiency.

[0016] Secondly, in view of the common problem of material blockage during the feeding process in traditional equipment, the present invention forms an efficient material dredging mechanism by designing a material dredging mechanism, combining incomplete gears, dredging slide bars and swing bars. This mechanism can ensure the smooth flow of materials during the feeding process and avoid the occurrence of blockage. In the feeding link, the dredging process is more efficient through the cooperation of the dredging slide bar and the I-head, and the dredging force can be adjusted according to actual needs, thereby ensuring the stable transportation of materials and reducing downtime and equipment failure rate.

[0017] In addition, the innovative design of the material combing amplitude adjustment mechanism effectively solves the problem of unevenness in material handling. By adjusting the position of the extrusion cone block, the movement amplitude of the dredging slide rod can be precisely controlled each time, enabling the equipment to flexibly adapt to different material characteristics when processing different materials, ensuring the continuity and stability of production.

[0018] To improve the safety of the equipment, the present invention has been comprehensively improved in terms of protection. The protection mechanism can effectively prevent material splashing or component damage during equipment operation through the protective top plate slidably arranged in the storage groove, ensuring the safety of the operator. Moreover, the protective top plate can be conveniently removed or disassembled during the maintenance process, greatly improving the maintenance efficiency of the equipment and reducing the equipment downtime.

[0019] In summary, through the innovation of the design of the twin-screw extruder, the present invention overcomes the problems of uneven heating, material blockage, unstable material flow, and poor equipment safety in the prior art. The improved equipment has significant beneficial effects in improving production efficiency, reducing failure rates, lowering maintenance costs, and ensuring production safety, and can better meet the requirements of high efficiency, stability, and reliability in plastic production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the installation three-dimensional structure schematic diagram of the present invention; Figure 2 is the longitudinal sectional structure schematic diagram of the present invention; Figure 3 is the transverse sectional structure schematic diagram of the present invention; Figure 4 is the installation sectional structure schematic diagram of the barrel and the dredging slide rod of the present invention; Figure 5 is the protection structure schematic diagram of the present invention; Figure 6 is the installation schematic diagram of the material combing structure of the present invention; Figure 7 is the material combing amplitude adjustment structure schematic diagram of the present invention; Figure 8 is the structure schematic diagram of the slider and the extrusion cone block of the present invention.

[0021] Among them, 1. Extruder structure; 11. Base; 12. Sealed heating seat; 121. Boss; 122. Chute; 123. Vertical plate; 13. Die holder; 14. Reducer; 141. Storage groove; 15. Extrusion motor; 16. Extrusion screw; 17. First T-shaped groove; 2. Mixing mechanism; 21. Temporary storage barrel; 22. Stirring motor; 23. Stirring rod; 24. Stirring paddle; 25. Feeding auger; 3. Material dispersing mechanism; 31. Incomplete gear; 32. Swing rod; 33. U-shaped fork rod; 34. Dispersing slide rod; 35. I-shaped head; 36. Bidirectional gear rod; 37. Connecting rod; 38. Connecting head; 39. Extrusion pulley; 310. Spring; 4. Comb material amplitude adjustment mechanism; 41. Power gear; 42. Toothed disc; 44. Second T-slot; 45. Sliding block; 46. Extrusion cone block; 47. Adjusting thread; 48. Connecting sleeve; 49. Connecting rod; 5. Protective mechanism; 51. Protective top plate; 52. Extrusion bolt; 53. Docking block. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1: See also Figure 1-8 A twin-screw extruder for plastic production includes an extruder structure 1, which includes a base 11 fixed on the ground, a reducer 14 is fixed on one side of the base 11, a sealing heating seat 12 is arranged on the upper surface of the base 11, a gap is left between the sealing heating seat 12 and the reducer 14, two extrusion screws 16 are rotatably installed inside the sealing heating seat 12, and the two extrusion screws 16 are respectively installed on the output ends of the reducer 14, an extrusion motor 15 is installed on the back of the reducer 14, a mold base 13 is installed at the front end of the sealing heating seat 12, and a mixing mechanism 2 is installed at the end of the top of the sealing heating seat 12 close to the reducer 14, and the mixing mechanism 2 includes a temporary storage barrel 21, and the temporary storage barrel 21 is connected with the inside of the sealing heating seat 12; A boss 121 is provided on one side of the sealing heating seat 12 near the reducer 14, and the boss 121 is placed between the mixing mechanism 2 and the reducer 14. A material discharging mechanism 3 is installed on the top of the boss 121, and the material discharging mechanism 3 is used to dredge the material; the material discharging mechanism 3 includes an incomplete gear 31 symmetrically rotating on the top of the boss 121 and a dredging slide rod 34 sliding on both sides of the bottom of the temporary storage barrel 21, a swing rod 32 is provided on the front side of the incomplete gear 31, and a U-shaped fork rod 33 is provided at the front end of the swing rod 32, and the material discharging mechanism 3 is used to dredge the material. The slide bar 34 is arranged horizontally and symmetrically, and an I-head 35 is arranged at the outer end of the dredging slide bar 34, and the I-head 35 is placed on the outside of the temporary storage barrel 21. The U-shaped fork rod 33 is stuck on the inner side of the I-head 35, and the inner end of the dredging slide bar 34 is placed on the inner side of the temporary storage barrel 21; the design of the material unblocking mechanism 3 can effectively solve the problem of uneven flow caused by material blockage in the prior art. Through the interaction between the extrusion pulley 39 and the incomplete gear 31, the material can be prevented from being blocked during the feeding process, thereby ensuring the continuous operation of the production line.

[0024] A combing material amplitude adjustment mechanism 4 is provided at the front side of the reducer 14, and the combing material amplitude adjustment mechanism 4 is used to control the range of motion of the dredging slide bar 34; the adjustment mechanism 4 is composed of a power gear 41 and a toothed disc 42 rotating on the outer surface of the reducer 14. The power gear 41 and the toothed disc 42 are meshed with each other, and the front surface of the toothed disc 42 is evenly provided with a second T-slot 44 at the outer center of its rotating axis, and a slider 45 is slidably installed inside the second T-slot 44, and an extrusion cone block 46 is provided outside the slider 45. Through the design of this combing material amplitude adjustment mechanism 4, the operator can flexibly adjust the range of motion of the dredging slide bar 34 according to the production conditions, thereby controlling the dredging strength of the material and ensuring the smooth progress of the feeding process.

[0025] See also Figure 6-8 The cross section of the extrusion cone block 46 is a right triangle, and the cross-sectional size of the extrusion cone block 46 gradually changes along the direction of the second T-slot 44, and the extrusion pulley 39 contacts the inclined surface of the extrusion cone block 46. When the extrusion pulley 39 contacts the extrusion cone block 46, the material is uniformly extruded and guided, further avoiding production problems caused by uneven material flow. The triangular cross-sectional design of the extrusion cone block 46 enables more precise control of the extrusion direction and strength of the material during adjustment, thereby improving production efficiency and stability.

[0026] See also Figure 7-8 An adjusting thread 47 is rotatably mounted on the center of the surface of the toothed disc 42, a hexagonal head is provided at the end of the adjusting thread 47, a connecting sleeve 48 is screwed on the surface of the adjusting thread 47, connecting rods 49 are evenly hinged on the surface of the connecting sleeve 48, and the ends of the connecting rods 49 that are away from the connecting sleeve 48 are respectively hinged on the slider 45. Through this adjustment structure, the user can conveniently adjust the working position of the extrusion cone block 46, further optimize the operating performance of the equipment, and ensure the efficient and stable operation of the equipment under different working conditions.

[0027] Refer to Figure 1-4 Figure 1-4 , a stirring motor 22 is fixed at the top of the temporary storage bin 21. The output end of the stirring motor 22 is installed downward with a stirring rod 23. The surface of the stirring rod 23 is provided with stirring paddles 24. The bottom of the stirring rod 23 is installed with a feeding auger 25. The feeding auger 25 is placed between the temporary storage bin 21 and the sealed heating base 12. The design of the stirring paddles 24 enables the materials in the temporary storage bin 21 to be evenly mixed, avoiding the problems of material deposition and accumulation. The feeding auger 25 ensures that the materials can be stably and evenly transported to the sealed heating base 12, improving the production efficiency and ensuring the product quality.

[0028] Refer to Figure 1-5 Figure 1-5 , a storage groove 141 is opened at the top of the speed reducer 14. The center of the surface of the storage groove 141 is opened with a first T-shaped groove 17. The protection mechanism 5 includes a protection top plate 51 slid inside the storage groove 141, and the protection top plate 51 extends forward. The protection mechanism 5 can effectively avoid potential safety hazards caused by material splashing or component loosening during the operation of the equipment. The protection top plate 51 can be conveniently disassembled or moved when necessary, providing convenience for the maintenance and repair of the equipment.

[0029] Refer to Figure 3-5 Figure 3-5 , the rear end of the protection top plate 51 is screwed through with an extrusion bolt 52. A docking square block 53 is slidably installed inside the first T-shaped groove 17. The end of the extrusion bolt 52 is screwed onto the docking square block 53. Through the design of this protection mechanism, the equipment not only has a good protection effect during use, but also can be quickly and conveniently disassembled and maintained when maintenance or adjustment is required, reducing the downtime of the equipment and improving the production efficiency and safety.

[0030] Example 2: An example for improving the uniformity of material heating and extrusion Expansion of the working principle: In this embodiment, two high-efficiency extrusion screws 16 are installed inside the sealed heating base 12 of the twin-screw extruder. These screws are driven by the output end of the speed reducer 14 to achieve uniform heating and extrusion of plastic particles. The material of the extrusion screws 16 is selected as high-alloy steel with high temperature resistance and corrosion resistance (for example: X40CrMoV5-1) to ensure stability during long-term use. The pitch and design shape of the screws are optimized to ensure full mixing and uniform heating of the materials inside the heating base.

[0031] Experimental data of the example: To verify the heating uniformity of the present invention, a comparative experimental group was set up. In the experiment, the same type of plastic particles (polyethylene particles) were used, and the traditional designed extruder and the improved extruder of the present invention were used for experiments respectively.

[0032]

[0033] The experimental results show that the twin-screw extruder designed in the present invention exhibits a more uniform temperature distribution during the material heating process, the temperature difference range is controlled within 10°C, the material adhesion is greatly reduced, and the production efficiency is increased by 28.57%.

[0034] Example 3: Example of material blockage and unblocking Working principle expansion: In this embodiment, the twin-screw extruder is designed with an efficient material dispersing mechanism 3, which adopts the cooperation of the incomplete gear 31 and the dredging slide rod 34. The dredging slide rod 34 slides from both sides, and cooperates with the I-shaped head 35 and the U-shaped fork rod 33 to effectively dredge the material. By adjusting the working range of the material dispersing mechanism, the user can adjust the material conveying speed according to the characteristics of different materials to avoid blockage. The control method of the material dispersing mechanism adopts an electronic control system to monitor the material flow in real time and adjust the working parameters according to the material conveying situation.

[0035] Example experimental data: In order to verify the effectiveness of the dredging system of the present invention, we set up a comparative experiment and carried out material dredging tests on the extruders of traditional design and the extruders of the present invention respectively.

[0036]

[0037] Experimental results show that the dredging system of the present invention effectively reduces the material blockage rate from 12% to 2%, improves the feeding speed and equipment operation efficiency, and reduces downtime.

[0038] Embodiment 4: Embodiment of combing material amplitude adjustment and uniformity control Working principle expansion: In this embodiment, the combing material amplitude adjustment mechanism 4 realizes precise adjustment through the cooperation of the power gear 41 and the toothed disc 42. By adjusting the movement of the thread 47 and the connecting sleeve 48, the user can control the forward amplitude of the extrusion cone 46, thereby changing the extrusion intensity and conveying efficiency of the material. This design allows the equipment to respond flexibly to different materials, ensuring uniformity and stability during the production process.

[0039] Example experimental data: In order to verify the effectiveness of the combing amplitude adjustment mechanism, we conducted a comparative experiment on the material processing effects of different amplitude adjustments.

[0040]

[0041] Experimental data shows that the adjustment of the material combing amplitude can effectively improve the material flow rate and production efficiency, with a production efficiency increase of 5 - 10 kg / h, and the extrusion strength remains stable.

[0042] Example 5: Example of the protection mechanism Expansion of the working principle: In this embodiment, the protection mechanism 5 is designed with a protection top plate 51, which is slidably arranged in the storage groove 141 and can provide effective safety protection during the operation of the equipment to prevent material splashing or damage to equipment components. The protection top plate 51 is made of high-temperature and corrosion-resistant materials (such as stainless steel SUS304), ensuring stability during long-term use. The adjustability of the protection top plate enables users to quickly disassemble it during equipment maintenance, reducing the downtime.

[0043] Experimental data of the example: To verify the effectiveness of the protection mechanism, a material splash test was conducted, and the experimental results with and without protection were compared.

[0044]

[0045] The experimental results show that after adopting the protection top plate 51, the material splash rate has decreased significantly, from 18% to 2%, and the incidence of safety accidents of the equipment has dropped to zero, ensuring the safety during the production process.

[0046] Working principle: When in use, start the extrusion motor 15 to drive the rotation of the two extrusion screws 16 through the conversion of the speed reducer 14, so as to extrude and heat the plastic particles entering the inside of the sealed heating seat 12, and convey the material forward, and form it through the die seat 13. During the startup of the extrusion motor 15, it can drive the power gear 41 to rotate. Through the meshing of the power gear 41 and the gear disk 42, it can drive the multiple extrusion cones 46 on its surface to rotate cyclically. When feeding, pour the material particles into the temporary storage barrel 21, start the stirring motor 22 to drive the stirring rod 23 to rotate, and then mix and stir the internal material through the stirring paddle 24, and drive the material to be conveyed into the sealed heating seat 12 through the rotation of the feeding auger 25; Due to the presence of the spring 310, the connector 38 always has a backward force, which enables the extrusion pulley 39 to contact the extrusion cone block 46. Therefore, when the extrusion cone block 46 rotates past, the connector 38 can be pushed forward by the inclined surface of its surface. Since the extrusion cone block 46 is a right triangle, the potential energy of the spring 310 is the largest when the connector 38 is pushed to the front end. When a single extrusion cone block 46 rotates past, the connector 38 will move backward quickly. The movement of the connector 38 can drive the double extrusion cone block 46 to rotate past. The gear rod 36 moves and rotates. When the connector 38 moves forward, the two swing rods 32 can be driven to open outward through the meshing of the bidirectional gear rod 36 and the incomplete gear 31, and the dredging slide rod 34 is pulled outward through the cooperation of the U-shaped fork rod 33 and the I-shaped head 35. On the contrary, when the connector 38 moves backward quickly, the dredging slide rod 34 is driven to move inward quickly to produce an impact on the temporary storage barrel 21, and the lower part of the temporary storage barrel 21 is dredged to prevent blockage during unloading and ensure the smoothness of unloading. The combing material amplitude adjustment mechanism 4 can control the amplitude of a single movement of the dredging slide bar 34. During adjustment, the adjustment thread 47 is driven to rotate by the cooperation of the hexagonal wrench and the hexagonal head, thereby driving the connecting sleeve 48 to move axially through the screwing of the thread. The movement of the connecting sleeve 48 can synchronously push the slider 45 to move through the connecting rod 49, and then drive the extrusion cone block 46 to move. Since the extrusion cone block 46 has a structure with one end larger than the other, the distance of the extrusion pulley 39 moving forward at a single time can be controlled when the extrusion cone block 46 is displaced, and then the amplitude of a single movement of the dredging slide bar 34 can be controlled, and it can be flexibly adjusted according to the use environment. The top protection mechanism 5 can move forward and backward. Under normal conditions, the top protection plate 51 moves forward to the top of the material dispersing mechanism 3 and the material combing amplitude adjustment mechanism 4 to protect them and prevent them from falling onto the internal components during loading. Conversely, when maintenance is required, the top protection plate 51 can be moved backward. When the top protection plate 51 moves into place, the extrusion bolt 52 is screwed in to drive the docking block 53 to move upward to squeeze the first T-slot 17, thereby ensuring the stability of the top protection plate 51.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twin-screw extruder for plastic production, comprising an extruder structure (1), characterized in that: The extruder structure (1) comprises a base (11) fixed on the ground, a reducer (14) is fixed on one side of the base (11), a sealing heating seat (12) is arranged on the upper surface of the base (11), a mixing mechanism (2) is installed at one end of the top of the sealing heating seat (12) close to the reducer (14), and the mixing mechanism (2) comprises a temporary storage barrel (21) placed above the sealing heating seat (21); A boss (121) is provided on one side of the upper surface of the sealing heating seat (12), the boss (121) is placed between the mixing mechanism (2) and the reducer (14), and a material dispersing mechanism (3) is installed on the top of the boss (121), the material dispersing mechanism (3) is used to dredge the material; The material discharging mechanism (3) comprises an incomplete gear (31) symmetrically rotating on the top of the boss (121) and a dredging slide rod (34) sliding on both sides of the bottom of the temporary material storage barrel (21), and the inner end of the dredging slide rod (34) is placed inside the temporary material storage barrel (21); A combing material amplitude adjustment mechanism (4) is provided on the front side of the reducer (14), and the combing material amplitude adjustment mechanism (4) is used to control the movable amplitude of the dredging slide rod (34).

2. A twin-screw extruder for plastic production according to claim 1, characterized in that: A swing rod (32) is arranged at the front side of the incomplete gear (31), a U-shaped fork rod (33) is arranged at the front end of the swing rod (32), the dredging slide rod (34) is arranged horizontally symmetrically, an I-shaped head (35) is arranged at the outer end of the dredging slide rod (34), the I-shaped head (35) is placed outside the temporary storage barrel (21), the U-shaped fork rod (33) is clamped inside the I-shaped head (35), a slide groove (122) is opened on the upper surface of the boss (121), a vertical plate (123) is arranged at the rear side of the top of the boss (121), a bidirectional gear rod (36) is slidably installed inside the slide groove (122), the bidirectional gear rod (36) is placed between the two incomplete gears (31), and the bidirectional gear rod (36) is respectively meshed with the two incomplete gears (31).

3. A twin-screw extruder for plastic production according to claim 2, characterized in that: A connecting rod (37) is provided at the rear end of the bidirectional toothed rod (36), the connecting rod (37) passing through the vertical plate (123), a connecting head (38) is provided at the rear end of the connecting rod (37), an extrusion pulley (39) is rotatably mounted at the rear end of the connecting head (38), a spring (310) is sleeved on the surface of the connecting rod (37), and the spring (310) is placed between the vertical plate (123) and the connecting head (38).

4. A twin-screw extruder for plastic production according to claim 3, characterized in that: The combing material amplitude adjustment mechanism (4) comprises a power gear (41) mounted on the output shaft of the power gear (41) and a toothed disc (42) rotating on the outer surface of the reducer (14); The power gear (41) and the toothed disc (42) mesh with each other. The front surface of the toothed disc (42) is evenly provided with second T-shaped grooves (44) at the outer center of the rotation axis. A slider (45) is slidably mounted inside the second T-shaped groove (44). An extrusion cone block (46) is arranged outside the slider (45).

5. A twin-screw extruder for plastic production according to claim 4, characterized in that: The cross section of the extrusion cone block (46) is in the shape of a right triangle, and the cross-sectional dimension of the extrusion cone block (46) gradually changes along the direction of the second T-shaped groove (44), and the extrusion pulley (39) is in contact with the inclined surface of the extrusion cone block (46).

6. A twin-screw extruder for plastic production according to claim 4, characterized in that: An adjusting thread (47) is rotatably mounted on the center of the surface of the toothed disc (42), a hexagonal head is provided at the end of the adjusting thread (47), a connecting sleeve (48) is screwed on the surface of the adjusting thread (47), connecting rods (49) are evenly hinged on the surface of the connecting sleeve (48), and ends of a plurality of connecting rods (49) facing away from the connecting sleeve (48) are respectively hinged on the slider (45).

7. A twin-screw extruder for plastic production according to claim 1, characterized in that: A stirring motor (22) is fixed on the top of the temporary storage barrel (21), a stirring rod (23) is mounted downwardly from the output end of the stirring motor (22), a stirring paddle (24) is arranged on the surface of the stirring rod (23), a feeding auger (25) is mounted on the bottom of the stirring rod (23), and the feeding auger (25) is placed between the temporary storage barrel (21) and the sealed heating seat (12).

8. A twin-screw extruder for plastic production according to claim 1, characterized in that: The reducer (14) has a storage groove (141) at the top, and a first T-shaped groove (17) is provided at the center of the surface of the storage groove (141). A protective mechanism (5) is slidably pressed on the front side of the top of the reducer (14), and the protective mechanism (5) is placed above the material thinning mechanism (3) and the material combing amplitude adjustment mechanism (4). The protective mechanism (5) comprises a protective top plate (51) that slides on the inner side of the storage groove (141), and the protective top plate (51) extends forward.

9. A twin-screw extruder for plastic production according to claim 8, characterized in that: An extrusion bolt (52) is screwed through the rear end of the protective top plate (51), a docking block (53) is slidably mounted inside the first T-shaped slot (17), and an end of the extrusion bolt (52) is screwed onto the docking block (53).

10. A twin-screw extruder for plastic production according to claim 1, characterized in that: A gap is left between the sealing heating seat (12) and the reducer (14); two extrusion screws (16) are rotatably mounted inside the sealing heating seat (12); the two extrusion screws (16) are respectively mounted on output ends of the reducer (14); an extrusion motor (15) is mounted on the back of the reducer (14); and a mold base (13) is mounted on the front end of the sealing heating seat (12).

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