Double-screw plastic extruder

Abstract

The invention discloses a double-screw plastic extruder, and relates to the technical field of plastic processing, the double-screw plastic extruder comprises a self-adaptive double-screw adjusting assembly which is mounted at the top of a bearing buffer base and used for plastic extrusion, and under the cooperation of the self-adaptive double-screw adjusting assembly and a feeding thermoplastic regulating assembly, in the whole plastic extrusion process, the self-adaptive double-screw adjusting assembly and the feeding thermoplastic regulating assembly are matched, so that the plastic extrusion efficiency is improved; the integrated detection sensor continuously monitors various parameters of the screw, and when abnormal pressure change, non-uniform material mixing or extrusion resistance are found, the external logic controller adjusts the rotating speed difference or temperature of the screw and optimizes the flowing and mixing states of the materials according to conditions, so that the adaptability of the extruder to different plastic raw materials and process requirements is integrally and greatly improved, and the production efficiency is improved. The viscosity of thermoplastic plastic is reduced, material bridging and screw adhesion are prevented, the stability of the product quality is guaranteed, meanwhile, under the cooperation of the extrusion regulation and control assembly, according to the extrusion requirement, extrusion is automatically formed, the extrusion head is replaced, and the operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, in particular to a twin-screw plastic extruder. Background Art

[0002] An extruder is a machine that can extrude the supplied hot melt plastic to one side through the pressure of the rotating screw and change it into the desired shape through a shaped extrusion hole. The desired shape of plastic products can be obtained through an extruder. It is often used in the process of processing plastic raw materials. Some extruders are equipped with two screws, which have better extrusion speed and extrusion pressure. When the injection molding machine is extruding, the forward thrust is generated by the rapidly rotating screw.

[0003] At present, in the use of twin-screw plastic extruders, when the plastic particles are extruded inside the conventional extruder, the screw cannot be effectively adjusted, resulting in accumulation or partial vacancies of the plastic particles when entering the screw, causing uneven feeding. In addition, for plastic particles with high thermoplasticity, material bridging is easily formed when the screw or the feed end is operated, resulting in plastic adhesion on the screw surface, causing discontinuity in feeding or screw operation, resulting in fluctuations in product quality, defective products, and reduced efficiency of plastic extrusion. Therefore, it is necessary to propose a twin-screw plastic extruder. Summary of the invention

[0004] The object of the present invention is to provide a twin-screw plastic extruder to solve the problem proposed in the above-mentioned background technology that during the use of the twin-screw plastic extruder, when the plastic particles are extruded, the screw cannot be effectively adjusted inside the conventional extruder, resulting in accumulation or partial vacancies of the plastic particles when entering the screw, causing uneven feeding, and for plastic particles with high thermoplasticity, it is easy to form material bridges when the screw or the feed end is operating, resulting in plastic adhesion on the screw surface, so that the discontinuity of the feeding or screw operation causes product quality fluctuations, defective products, and reduced plastic extrusion efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: a twin-screw plastic extruder, comprising: The adaptive twin-screw adjustment component is installed on the top of the load-bearing buffer base and is used to adaptively adjust the extrusion rate and intensity according to the material and characteristics of the plastic during plastic extrusion, so as to ensure that various plastic components are fully mixed in the barrel by adjusting the speed difference, pitch change and different thread structure combinations of the screws, thereby avoiding product performance defects caused by local uneven mixing; The feed thermoplastic regulating component is installed at the top of the side end of the barrel, and is used for real-time monitoring through the embedded material detection sensor installed on the side of the feed end, and starts regulation according to the thermoplasticity of the incoming material, and forms adhesion inside the adaptive twin-screw regulating component to affect subsequent operations; Multiple sections of electromagnetic heating coils are installed inside the barrel structure and are used to automatically adjust according to extrusion parameters under the control of a secondary controller electrically connected to the side, thereby improving the plastic extrusion efficiency; The extrusion control component is installed at the outlet side of the barrel and is used to automatically perform extrusion switching operations according to extrusion requirements.

[0006] Preferably, the adaptive twin-screw adjustment assembly includes: A driving motor, a transmission gear set, a double-screw driving connecting shaft, a first toothed screw, a second toothed screw and a third toothed screw. The driving motor is installed on the top wall of the bearing buffer base. The output end of the driving motor drives the transmission gear set to make the double-screw driving connecting shaft form rotation adjustment. A speed-increasing regulating motor is installed on the connecting side of the first toothed screw and the second toothed screw. A speed-increasing transmission gear set is set at the output end of the speed-increasing regulating motor. A first electromagnetic clutch is set on the side of the two groups of speed-increasing transmission gears in the speed-increasing transmission gear set. The first electromagnetic clutch is located between the speed-increasing transmission gear set, the first toothed screw and the second toothed screw.

[0007] Preferably, a reduction control motor is installed on the connecting side of the second toothed screw and the third toothed screw, and a reduction transmission gear set is arranged at the output end of the reduction control motor, and a second electromagnetic clutch is installed on the sides of the two groups of reduction transmission gears in the reduction transmission gear set, and the second electromagnetic clutch is located between the reduction transmission gear set, the second toothed screw and the third toothed screw, and the external tooth structures of the first toothed screw, the second toothed screw and the third toothed screw are different, and the inside of the first toothed screw, the second toothed screw and the third toothed screw are all provided with through holes, and the inside of the through holes is interspersed with a hot and cold control element, and the outside of the hot and cold control element is provided with a spiral circulation tube, and the side ends of the first toothed screw, the second toothed screw and the third toothed screw are all installed with stator and rotor bearings, and the side ends of the transmission gear set, the speed increase transmission gear set and the reduction transmission gear set are respectively connected to the side ends of the first toothed screw, the second toothed screw and the third toothed screw through the stator and rotor bearings.

[0008] Preferably, a guide diverter is installed at the bottom of the stator and rotor bearing components, and the side end of the guide diverter is connected to a coolant pumping pipe. The left and right ends of the first toothed screw, the second toothed screw and the third toothed screw are respectively provided with a first circulation pipe end and a second circulation pipe end. The side end of the coolant pumping pipe is connected to the first circulation pipe end through a spiral circulation pipe in cooperation with the connecting control valve end.

[0009] Preferably, the other side end of the guide diverter is connected to a heat exchange fluid pump outlet pipe, and the side end of the heat exchange fluid pump outlet pipe is connected through a spiral circulation pipe and a second circulation pipe end in cooperation with the connecting control valve end, and the side end of the heat exchange fluid pump outlet pipe is connected to a guide pipe, and the bottom end of the coolant pumping pipe is connected to a two-way output pipeline, and the side end of the two-way output pipeline is connected to a circulating heat exchange pump box, and integrated detection sensors are installed inside the first toothed screw, the second toothed screw and the third toothed screw, and the integrated detection sensor is composed of a speed sensor, a torque sensor, a pressure sensor and a temperature sensor.

[0010] Preferably, the feed thermoplastic regulating component comprises: A feed end, a condensation slowing down staggered plate, a cooling shell and a rotating connecting chamber, wherein the condensation slowing down staggered plate is installed inside the feed end, the cooling shell is installed at the bottom of the feed end, the rotating connecting chamber is located at the center end of the cooling shell and there is a material gap therebetween, the side end of the rotating connecting chamber is installed with a regulating drive pulley structure, and multiple groups of first contact heat conductive plates and second contact heat conductive plates are respectively installed on the outer circumference of the rotating connecting chamber, the width of the multiple groups of second contact heat conductive plates is greater than that of the multiple groups of first contact heat conductive plates, and the side ends of the rotating connecting chamber are respectively connected with a coolant riser pipe and a heat exchange circulation pipe through a rotor structure, and the bottoms of the coolant riser pipe and the heat exchange circulation pipe are connected with the top side end of the circulating heat exchange pump box.

[0011] Preferably, the extrusion control component includes: A transverse base adjustment guide rail, a load-bearing slide rod frame, a pulley drive structure and a rotating connection rotation rod. The pulley drive structure is installed on the top of the load-bearing slide rod frame, the load-bearing slide rod frame is located inside the transverse base adjustment guide rail for sliding adjustment, and the top of the load-bearing slide rod frame is fastened with a connecting rod body.

[0012] Preferably, multiple groups of extrusion head frames are arranged around the circumference of the rotatably connected rotation rod, and sealing interlocking plates are integrally formed at the top ends of the multiple groups of extrusion head frames. Extrusion ends are respectively installed inside the multiple groups of extrusion head frames, and the extrusion ends are composed of pipes, plates or special-shaped materials. Sealing reinforcement members are arranged at the bottom side ends of the multiple groups of extrusion head frames.

[0013] Preferably, an extrusion control end is arranged at the side end of the barrel, an extrusion detection sensor is arranged at the inner side end of the extrusion control end, and a plurality of groups of bearing brackets are arranged at the bottom of the barrel.

[0014] Preferably, the plurality of groups of extrusion head frames cooperate with the sealing interlocking plates to drive the extrusion end and the extrusion control end to form an automatically controlled sealed connection.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, when the twin-screw plastic extruder is in operation, the drive motor is started, and its output end drives the transmission gear set to rotate, thereby causing the twin-screw drive connecting shaft to start rotating, and the first tooth screw, the second tooth screw and the third tooth screw rotate synchronously at a low speed. At the same time, the integrated detection sensor starts working, monitors the parameters such as the speed, torque, pressure and temperature of the screw in real time, and transmits the data to the external logic controller. According to the material and characteristics of the plastic, the external logic controller calculates the required screw speed difference and torque distribution, so that the integrated detection sensor continuously feeds back data to ensure that the screw speed and torque are accurately controlled. When the screw needs to be heated or cooled during operation, The external logic controller controls the opening or closing of the control valves in the coolant pumping pipe and the heat exchange fluid pumping pipe according to the temperature data fed back by the integrated detection sensor, so as to realize the precise regulation of the screw temperature. During the whole plastic extrusion process, the integrated detection sensor continuously monitors the various parameters of the screw. When abnormal pressure changes, uneven material mixing or extrusion is blocked, the external logic controller will adjust the screw speed difference or temperature according to the situation to optimize the flow and mixing state of the material, so as to greatly improve the adaptability of the extruder to different plastic raw materials and process requirements, reduce the viscosity of thermoplastics, prevent material bridging and screw adhesion, and ensure the stability of product quality.

[0016] 2. In the present invention, with the cooperation of the feeding thermoplastic regulating component, when the thermoplastic plastic particles are conveyed to the feeding end, they will first pass through the condensation slowing down staggered plate, and the condensation slowing down staggered plate is used to increase the flow path and collision opportunities of the material, so that the feeding speed of the material is initially reduced, and the material is distributed more evenly in the feeding end, reducing the possibility of local accumulation. After the material enters the feeding end, the material falls into the material gap, and then the regulating driving pulley structure is started to drive the rotating connection cavity to rotate. At this time, according to the real-time monitoring of the material detection sensor, when a high thermoplastic material is detected, the circulating heat exchange pump box selects to convey the coolant of suitable temperature to the rotating connection cavity through the coolant riser pipe. After the coolant enters the rotating connection cavity, as the rotating connection cavity rotates, the first contact heat conductive plate and the second contact heat conductive plate on its outer peripheral side alternately contact with the material gap. The plastic particles approach and move away from each other. Since the width of the multiple groups of second contact heat conductive plates is greater than that of the multiple groups of first contact heat conductive plates, the heat exchange is more uniform and efficient. The wider second contact heat conductive plates can contact the material over a large area during the rotation process to quickly absorb or release heat, while the narrower first contact heat conductive plates play a role in adjusting and homogenizing the heat distribution during the alternating process, ensuring that the material always enters the screw area at the best temperature for subsequent extrusion processing. After that, the generated heat fluid is transported to the circulating heat exchange pump box through the heat exchange circulation pipe. Then, after the processing is completed, the electric iris valve at the bottom of the cooling shell is opened to allow the material to fall into the barrel for subsequent operations. This effectively further reduces the problem of high thermoplastic plastic particles, which are prone to form material bridges when operating at the screw or feed end, resulting in plastic adhesion on the screw surface, thereby ensuring the overall product quality.

[0017] 3. In the present invention, with the cooperation of the extrusion regulating and controlling component, when the whole is in operation, according to the switching requirements of the extruder head, the bearing slide rod frame drives the pulley driving structure to slide on the lateral base adjustment guide rail, and the bearing slide rod frame drives the rotating connection rotation rod to move, so that the selected extruder head frame moves to the position corresponding to the extrusion control end. During the movement, the extrusion detection sensor monitors the position information of the extruder head frame in real time. When the preset precise position is reached, the pulley driving structure is started, so that with the cooperation of the rotating connection rotation rod, the extruder head frame is driven to be accurately aligned with the extrusion control end. After the positioning of the extruder head frame is completed, the sealing joint plate is used to automatically control the sealing connection with the extrusion control end, so as to seal the extruder head frame. Under the action of the pneumatic device installed on the side, the sealing plate fits tightly against the side slotted connection surface of the extrusion control end. At the same time, the sealing reinforcement further enhances the sealing effect to prevent the plastic melt from leaking during the extrusion process. At this time, the extrusion detection sensor detects the integrity of the sealing connection again. During the extrusion process, the extrusion detection sensor continuously monitors the extrusion pressure, temperature, flow rate and other parameters. When the product type needs to be changed or the extruder head fails, the pulley drive structure is started again, the currently used extruder head frame is removed, a new extruder head frame is selected and the above switching and connection process is repeated. For the removed extruder head frame, the internal extrusion end structure can be cleaned, maintained or replaced to ensure performance during the next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of a twin-screw plastic extruder of the present invention; Figure 2 It is a schematic structural diagram of a twin-screw plastic extruder in a side view of the present invention; Figure 3 This is a schematic diagram of the installation position structure of a multi-section electromagnetic heating coil in a twin-screw plastic extruder of the present invention; Figure 4 This is a structural schematic diagram of a feed thermoplastic regulating component in a twin-screw plastic extruder of the present invention; Figure 5 A twin-screw plastic extruder of the present invention Figure 3 A schematic diagram of the enlarged structure at point A; Figure 6 It is a structural schematic diagram of an extrusion regulating component in a twin-screw plastic extruder of the present invention; Figure 7 It is a structural schematic diagram of an adaptive twin-screw adjusting component in a twin-screw plastic extruder of the present invention; Figure 8 The present invention is a schematic diagram of a partial internal cross-sectional structure of an adaptive twin-screw adjusting component in a twin-screw plastic extruder.

[0019] In the figure: 1, bearing buffer base; 2, adaptive twin-screw adjustment assembly; 201, driving motor; 202, transmission gear set; 203, twin-screw driving connecting shaft; 204, first toothed screw; 205, speed increasing control motor; 206, speed increasing transmission gear set; 207, first electromagnetic clutch; 208, speed reducing control motor; 209, second toothed screw; 2090, speed reducing transmission gear set; 2091, second electromagnetic clutch; 2092, third toothed screw; 2093, two-way output pipeline; 2094, stator and rotor bearing; 2095, guide diverter; 2096, coolant pumping pipe; 2097, guide pipe; 2098, cold and hot control original; 2099, spiral circulation pipe; 2010, first circulation pipe end; 2012, second circulation pipe end; 2013, heat exchange fluid pump out Tube; 3. Feed thermoplastic regulating component; 301. Feed end; 302. Condensation slowing staggered plate; 303. Cooling shell; 304. Rotating connecting cavity; 305. Material gap; 306. Regulating driving pulley structure; 307. First contact heat conducting plate; 308. Second contact heat conducting plate; 309. Coolant rising pipe; 3090. Heat exchange circulation pipe; 4. Extrusion regulating component; 401. Horizontal base adjustment guide rail; 402. Bearing slide rod frame; 403. Pulley driving structure; 404. Connecting rod body; 405. Rotating connecting rotation rod; 406. Extrusion head frame; 407. Sealing interlocking plate; 408. Sealing reinforcement; 409. Extrusion end; 5. Extrusion detection sensor; 6. Extrusion control end; 7. Bearing bracket; 8. Circulating heat exchange pump box; 9. Electromagnetic heating coil; 10. Secondary controller. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described 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.

[0021] Embodiment 1: In the present invention, referring to Figure 1 - Figure 8 Shown: A twin-screw plastic extruder, comprising: The adaptive twin-screw adjustment component 2 is installed on the top of the load-bearing buffer base 1, and is used to adaptively adjust the extrusion rate and strength according to the material and characteristics of the plastic during plastic extrusion, so as to ensure that various plastic components are fully mixed in the barrel by adjusting the speed difference, pitch change and different thread structure combinations of the screws, thereby avoiding product performance defects caused by local uneven mixing; The feed thermoplasticity regulating component 3 is installed at the top of the side end of the barrel, and is used for real-time monitoring through the material detection sensor embedded in the side of the feed end 301, and starts regulation according to the thermoplasticity of the incoming material, and forms adhesion inside the adaptive twin-screw regulating component 2 to affect subsequent operations; The multi-section electromagnetic heating coil 9 is installed and arranged inside the structure of the barrel, and is used to automatically adjust according to the extrusion parameters under the control of the secondary controller 10 electrically connected to the side, so as to improve the plastic extrusion efficiency. During the extrusion process, the barrel temperature is monitored in real time by installing a temperature detection sensor on the inner surface of the barrel, and the temperature data is fed back to the secondary controller 10, so that the secondary controller 10 compares and analyzes the feedback data with the preset temperature range. When the temperature of a certain area of ​​the first tooth screw 204, the second tooth screw 209 and the third tooth screw 2092 is lower than the preset range, the secondary controller 10 increases the current of the corresponding electromagnetic heating coil 9 to increase the heating power. When the temperature is higher than the preset range, the current is reduced or the coolant pumping pipe 2096 and related structures in the adaptive twin-screw adjustment component 2 are used to cool down. At the same time, the secondary controller 10 will also dynamically adjust the heating power of the electromagnetic heating coil 9 according to the changes in extrusion parameters such as screw speed and material flow rate to ensure that the barrel temperature is always in the best state; The extrusion regulating component 4 is installed at the outlet side of the barrel and is used to automatically perform extrusion switching operations according to extrusion requirements.

[0022] Embodiment 2: In the present invention, according to Figure 1 - Figure 3 , Figure 7 and Figure 8 As shown, the adaptive twin-screw adjustment assembly 2 includes: A driving motor 201, a transmission gear set 202, a double-screw driving connecting shaft 203, a first toothed screw 204, a second toothed screw 209 and a third toothed screw 2092, the driving motor 201 is installed on the top wall of the bearing buffer base 1, the output end of the driving motor 201 drives the transmission gear set 202 to make the double-screw driving connecting shaft 203 form a rotation adjustment, the speed increase regulating motor 205 is installed on the connecting side of the first toothed screw 204 and the second toothed screw 209, the output end of the speed increase regulating motor 205 is provided with a speed increase transmission gear set 206, the side of the two groups of speed increase transmission gears in the speed increase transmission gear set 206 is installed with a first electromagnetic clutch 207, the first electromagnetic clutch 207 is located between the speed increase transmission gear set 206, the first toothed screw 204 and the second toothed screw 209.

[0023] A reduction control motor 208 is installed on the connecting side of the second toothed screw 209 and the third toothed screw 2092, and a reduction transmission gear set 2090 is arranged at the output end of the reduction control motor 208. A second electromagnetic clutch 2091 is installed on the side of two groups of reduction transmission gears in the reduction transmission gear set 2090. The second electromagnetic clutch 2091 is located between the reduction transmission gear set 2090, the second toothed screw 209 and the third toothed screw 2092. The external tooth structures of the first toothed screw 204, the second toothed screw 209 and the third toothed screw 2092 are different. The inside of the first toothed screw 204, the second toothed screw 209 and the third toothed screw 2092 are provided with through holes, and the inside of the through holes is connected with the cold and hot control element 2098, and the outside of the cold and hot control element 2098 is provided with a spiral circulation tube 2099, and the side ends of the first toothed screw 204, the second toothed screw 209 and the third toothed screw 2092 are installed with stator and rotor bearings 2094, and the side ends of the transmission gear set 202, the speed increase transmission gear set 206 and the speed reduction transmission gear set 2090 are connected to the side ends of the first toothed screw 204, the second toothed screw 209 and the third toothed screw 2092 through the stator and rotor bearings 2094 respectively.

[0024] A guide diverter 2095 is installed at the bottom of the stator and rotor bearing member 2094, and the side end of the guide diverter 2095 is connected to a coolant pumping pipe 2096. The left and right ends of the first toothed screw 204, the second toothed screw 209 and the third toothed screw 2092 are respectively provided with a first circulation pipe end 2010 and a second circulation pipe end 2012. The side end of the heat exchange fluid pump outlet pipe 2013 is connected to a guide pipe 2097. The side end of the coolant pumping pipe 2096 is connected to the first circulation pipe end 2010 through a spiral circulation pipe 2099 in cooperation with the connecting control valve end.

[0025] The other side end of the guide diverter 2095 is connected to the heat exchange fluid pump outlet pipe 2013, and the side end of the heat exchange fluid pump outlet pipe 2013 is connected through the spiral circulation pipe 2099 and the second circulation pipe end 2012 in cooperation with the connecting control valve end. The bottom end of the coolant pumping pipe 2096 is connected to the two-way output pipeline 2093, and the side end of the two-way output pipeline 2093 is connected to the circulating heat exchange pump box 8, and the first toothed screw 204, the second toothed screw 209 and the third toothed screw 2092 are all installed with integrated detection sensors, which are composed of a speed sensor, a torque sensor, a pressure sensor and a temperature sensor.

[0026] In a specific solution, when using a twin-screw plastic extruder, the drive motor 201 is started, and its output end drives the transmission gear set 202 to rotate, thereby causing the twin-screw drive connecting shaft 203 to start rotating, and the first tooth screw 204, the second tooth screw 209 and the third tooth screw 2092 rotate synchronously at a low speed. At the same time, the integrated detection sensor starts working, monitors the parameters such as the speed, torque, pressure and temperature of the screw in real time, and transmits the data to the external logic controller. According to the material and characteristics of the plastic, the external logic controller calculates the required screw speed difference and torque distribution. When it is necessary to increase the first tooth screw speed difference, the torque distribution is calculated. When the speed of the screw 204 and the second toothed screw 209 increases, the external logic controller starts the speed-increasing control motor 205 and engages the first electromagnetic clutch 207. The speed-increasing transmission gear set 206 transmits power to the first toothed screw 204 and the second toothed screw 209 to increase the speed. On the contrary, when it is necessary to reduce the speed of the second toothed screw 209 and the third toothed screw 2092, the speed-reducing control motor 208 is started and the second electromagnetic clutch 2091 is engaged. The speed reduction operation is achieved through the speed reduction transmission gear set 2090. During the adjustment process, the integrated detection sensor continuously feeds back data to ensure the screw speed. The screw rod is precisely controlled to achieve precise control of the screw rod and torque. When the screw rod needs to be heated or cooled during operation, the external logic controller controls the control valves in the coolant pumping pipe 2096 and the heat exchange fluid pumping pipe 2013 to open or close according to the temperature data fed back by the integrated detection sensor. When the temperature of the screw rod is too high, the control valve in the coolant pumping pipe 2096 is opened, and the coolant in the circulating heat exchange pump box 8 enters the coolant pumping pipe 2096 through the two-way output pipeline 2093, and then circulates inside the screw rod through the spiral circulation pipe 2099 to take away the heat and reduce the temperature of the screw rod. When heating is required, the heat exchange fluid pumping pipe 2013 is opened. The control valve is opened, and the heat exchange fluid with appropriate temperature enters the spiral circulation tube 2099 to heat the screw, thereby realizing precise control of the screw temperature. During the entire plastic extrusion process, the integrated detection sensor continuously monitors various parameters of the screw. When abnormal pressure changes, uneven material mixing or extrusion is blocked, the external logic controller will adjust the screw speed difference or temperature according to the situation to optimize the flow and mixing state of the material, which greatly improves the adaptability of the extruder to different plastic raw materials and process requirements, reduces the viscosity of thermoplastics, prevents material bridging and screw adhesion, and ensures the stability of product quality.

[0027] Embodiment 3: In the present invention, according to Figure 1 - Figure 4 As shown, the feed thermoplastic regulating component 3 includes: The feed end 301, the condensation slowing down staggered plate 302, the cooling shell 303 and the rotating connecting chamber 304, the condensation slowing down staggered plate 302 is installed inside the feed end 301, the cooling shell 303 is installed at the bottom of the feed end 301, the rotating connecting chamber 304 is located at the center end of the cooling shell 303 and there is a material gap 305 therebetween, the side end of the rotating connecting chamber 304 is installed with a regulating drive pulley structure 306, and the outer peripheral side of the rotating connecting chamber 304 is respectively installed with multiple groups of first contact heat conducting plates 307 and second contact heat conducting plates 308, the width of the multiple groups of second contact heat conducting plates 308 is greater than that of the multiple groups of first contact heat conducting plates 307, and the side ends of the rotating connecting chamber 304 are respectively connected to the cooling liquid riser 309 and the heat exchange circulation pipe 3090 through the rotor structure, and the bottoms of the cooling liquid riser 309 and the heat exchange circulation pipe 3090 are connected to the top side end of the circulating heat exchange pump box 8.

[0028] In a specific solution, before the above-mentioned twin-screw plastic extruder operates, the circulating heat exchange pump box 8 starts to work, and the temperature of the internal coolant or heat exchange fluid is adjusted and the circulation is prepared according to the preset temperature parameters. When the thermoplastic plastic particles are transported to the feed end 301, they will first pass through the condensation slowing down staggered plate 302. The condensation slowing down staggered plate 302 is used to increase the flow path and collision opportunities of the material, so that the feed speed of the material is initially reduced, and the material is distributed more evenly in the feed end, reducing the possibility of local accumulation. After the material enters the feed end 301, the material falls into the material gap 305, and then the drive pulley structure 306 is adjusted to start, driving the rotating connecting cavity 304 to rotate. At this time, According to the real-time monitoring of the material detection sensor, when a material with high thermoplasticity is detected, the circulating heat exchange pump box 8 selects to transport the coolant of suitable temperature to the rotating connection chamber 304 through the coolant riser 309. After the coolant enters the rotating connection chamber 304, as the rotating connection chamber 304 rotates, the first contact heat conductive plate 307 and the second contact heat conductive plate 308 on the outer peripheral side thereof alternately approach and move away from the plastic particles in the material gap 305. Since the width of the multiple groups of second contact heat conductive plates 308 is greater than that of the multiple groups of first contact heat conductive plates 307, the heat exchange is more uniform and efficient. The wider second contact heat conductive plate 308 can contact the material over a large area during the rotation process to quickly absorb or release heat. The narrower first contact heat conducting plate 307 plays a role in adjusting and homogenizing the heat distribution during the alternating process. That is, for materials with high thermoplasticity, when the coolant flows in the rotating connection chamber 304, the heat of the material is absorbed by the first contact heat conducting plate 307 and the second contact heat conducting plate 308, so that the material temperature is reduced to prevent it from being plasticized prematurely. For materials that need to be properly heated to improve fluidity, the heat exchange fluid of appropriate temperature is transported through the heat exchange circulation pipe 3090 to provide heat for the material. During the entire feeding process, the material temperature and the temperature changes of the coolant or heat exchange fluid are continuously monitored by the high-precision temperature sensor arranged on the rotating connection chamber 304. When it is found that the material temperature deviates from the preset appropriate feeding temperature range, the temperature sensor 3090 is used to monitor the material temperature and the temperature changes of the coolant or heat exchange fluid. The circulating heat exchange pump box 8 will adjust the flow and temperature of the coolant or heat exchange fluid accordingly, or adjust the driving pulley structure 306 to change the speed of the rotating connecting chamber 304, so as to optimize the heat exchange efficiency and ensure that the material always enters the screw area at the best temperature for subsequent extrusion processing. After that, the generated heat fluid can be transported to the circulating heat exchange pump box 8 through the heat exchange circulation pipe 3090. Then, after the processing is completed, the electric iris valve at the bottom of the cooling shell 303 is opened to allow the material to fall into the barrel for subsequent operations. The overall effect is to further reduce the problem of high thermoplastic plastic particles, which are easy to form material bridges when operating at the screw or feed end, resulting in plastic adhesion on the screw surface, thereby ensuring the overall product quality.

[0029] Embodiment 3: In the present invention, according to Figure 1 - Figure 3 and Figure 6 As shown, the extrusion control component 4 includes: A transverse base adjustment guide rail 401, a bearing slide frame 402, a pulley drive structure 403 and a rotating connection rotation rod 405. The pulley drive structure 403 is installed on the top of the bearing slide frame 402. The bearing slide frame 402 is located inside the transverse base adjustment guide rail 401 for internal sliding adjustment. The top of the bearing slide frame 402 is fastened with a connecting rod body 404.

[0030] A plurality of extrusion head frames 406 are arranged around the circumference of the rotatably connected rotation rod 405, and a sealing interlocking plate 407 is integrally formed at the top of the plurality of extrusion head frames 406. Extrusion ends 409 are respectively arranged inside the plurality of extrusion head frames 406, and the extrusion ends 409 are composed of pipes, plates or special-shaped materials. A sealing reinforcement 408 is installed on the bottom side end of the plurality of extrusion head frames 406.

[0031] An extrusion control end 6 is arranged at the side end of the barrel, an extrusion detection sensor 5 is arranged at the inner side end of the extrusion control end 6, and a plurality of groups of bearing brackets 7 are arranged at the bottom of the barrel.

[0032] The multiple groups of extrusion head frames 406 cooperate with the sealing interlocking plate 407 to drive the extrusion end 409 and the extrusion control end 6 to form an automatically controlled sealing connection.

[0033] In a specific solution, when the whole is in operation, according to the switching requirements of the extruder head, the bearing slide rod frame 402 drives the pulley driving structure 403 to slide on the horizontal base adjustment guide rail 401, and the bearing slide rod frame 402 drives the rotating connection rotation rod 405 to move, so that the selected extruder head frame 406 moves to the position corresponding to the extrusion control end 6. During the movement, the extrusion detection sensor 5 monitors the position information of the extruder head frame 406 in real time. When the preset precise position is reached, the pulley driving structure 403 is started, so that with the cooperation of the rotating connection rotation rod 405, the extruder head frame 406 is driven to be accurately aligned with the extrusion control end 6. After the extruder head frame 406 is positioned, it is automatically controlled and sealed with the extrusion control end 6 through the sealing interlocking plate 407. , the sealing interlocking plate 407 is tightly fitted to the side grooved connection surface of the extrusion control end 6 under the action of the pneumatic device installed on the side, and the sealing reinforcement 408 further enhances the sealing effect to prevent the plastic melt from leaking during the extrusion process. At this time, the extrusion detection sensor 5 detects the integrity of the sealing connection again. During the extrusion process, the extrusion detection sensor 5 continuously monitors the extrusion pressure, temperature, flow rate and other parameters. When the product type needs to be changed or the extruder head fails, the pulley drive structure 403 is started again, the currently used extrusion head frame 406 is removed, a new extrusion head frame 406 is selected and the above switching and connection process is repeated. For the removed extrusion head frame 406, the internal extrusion end 409 structure can be cleaned, maintained or replaced to ensure the performance during the next use.

[0034] The wiring diagrams of the drive motor 201, the speed increasing control motor 205, the speed decreasing control motor 208, the first electromagnetic clutch 207, the second electromagnetic clutch 2091, the material detection sensor, the temperature detection sensor, the integrated detection sensor and the high-precision temperature sensor in the present invention are common knowledge in the art, and their working principles are already known technologies. Appropriate models are selected according to actual use, so the control method and wiring arrangement of the drive motor 201, the speed increasing control motor 205, the speed decreasing control motor 208, the first electromagnetic clutch 207, the second electromagnetic clutch 2091, the material detection sensor, the temperature detection sensor, the integrated detection sensor and the high-precision temperature sensor will no longer be explained in detail.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A twin-screw plastic extruder, characterized in that: Included are: An adaptive twin-screw adjustment component (2) is mounted on the top of the load-bearing buffer base (1) and is used to adaptively adjust the extrusion rate and intensity according to the material and characteristics of the plastic during plastic extrusion, so that by adjusting the speed difference, pitch change and different thread structure combinations of the screws, various plastic components can be fully mixed in the barrel to avoid product performance defects caused by local uneven mixing; A feed thermoplastic regulating component (3) is installed at the top of the side end of the barrel and is used for real-time monitoring through a material detection sensor installed in the side of the feed end (301), starting and regulating according to the thermoplasticity of the fed material, and forming adhesion inside the adaptive twin-screw regulating component (2) to affect subsequent operations; A plurality of electromagnetic heating coils (9) are respectively installed and arranged inside the structure of the barrel, and are used to automatically adjust according to extrusion parameters under the control of a secondary controller (10) electrically connected to the side, so as to improve the plastic extrusion efficiency; An extrusion regulating component (4) is installed at the outlet side of the barrel and is used to automatically perform an extrusion switching operation according to extrusion requirements.

2. The twin-screw plastic extruder according to claim 1, characterized in that: The adaptive twin-screw adjustment component (2) comprises: A driving motor (201), a transmission gear set (202), a double-screw driving connecting shaft (203), a first toothed screw (204), a second toothed screw (209) and a third toothed screw (2092); the driving motor (201) is mounted on the top wall of the bearing buffer base (1); the output end of the driving motor (201) drives the transmission gear set (202) so that the double-screw driving connecting shaft (203) forms a rotation adjustment; a speed-increasing control motor (205) is mounted on the connecting side of the first toothed screw (204) and the second toothed screw (209); a speed-increasing transmission gear set (206) is arranged at the output end of the speed-increasing control motor (205); a first electromagnetic clutch (207) is mounted on the sides of two groups of speed-increasing transmission gears in the speed-increasing transmission gear set (206); and the first electromagnetic clutch (207) is located between the speed-increasing transmission gear set (206), the first toothed screw (204) and the second toothed screw (209).

3. The twin-screw plastic extruder according to claim 2, characterized in that: A reduction control motor (208) is installed on the connecting side of the second toothed screw (209) and the third toothed screw (2092); a reduction transmission gear set (2090) is arranged at the output end of the reduction control motor (208); a second electromagnetic clutch (2091) is installed on the side of two groups of reduction transmission gears in the reduction transmission gear set (2090); the second electromagnetic clutch (2091) is located between the reduction transmission gear set (2090), the second toothed screw (209) and the third toothed screw (2092); the first toothed screw (204), the second toothed screw (209) and the third toothed screw (2092) have different external tooth structures; the first toothed screw (204), the second toothed screw (209) and the third toothed screw (2092) have different external tooth structures; The rod (209) and the third toothed screw (2092) are provided with through holes inside, and a hot and cold control element (2098) is inserted and connected inside the through holes. The hot and cold control element (2098) is sleeved with a spiral circulation tube (2099) outside. The side ends of the first toothed screw (204), the second toothed screw (209) and the third toothed screw (2092) are all installed with stator and rotor bearings (2094). The side ends of the transmission gear set (202), the speed-increasing transmission gear set (206) and the speed-reducing transmission gear set (2090) are connected to the side ends of the first toothed screw (204), the second toothed screw (209) and the third toothed screw (2092) through the stator and rotor bearings (2094).

4. The twin-screw plastic extruder according to claim 3, characterized in that: A guide diverter (2095) is installed at the bottom of the stator and rotor bearing member (2094), and the side end of the guide diverter (2095) is connected to a coolant pumping pipe (2096). The left and right ends of the first toothed screw (204), the second toothed screw (209) and the third toothed screw (2092) are respectively provided with a first circulation pipe end (2010) and a second circulation pipe end (2012). The side end of the coolant pumping pipe (2096) is connected to the first circulation pipe end (2010) through a spiral circulation pipe (2099) in cooperation with the connecting control valve end.

5. The twin-screw plastic extruder according to claim 4, characterized in that: The other side end of the guide diverter (2095) is connected to a heat exchange fluid pump outlet pipe (2013), and the side end of the heat exchange fluid pump outlet pipe (2013) is connected to the second circulation pipe end (2012) through a spiral circulation pipe (2099) in cooperation with the connecting control valve end. The side end of the heat exchange fluid pump outlet pipe (2013) is connected to a guide pipe (2097), and the bottom end of the coolant pumping pipe (2096) is connected to a two-way output pipeline (2093), and the side end of the two-way output pipeline (2093) is connected to a circulating heat exchange pump box (8), and the first toothed screw (204), the second toothed screw (209) and the third toothed screw (2092) are all installed with integrated detection sensors, and the integrated detection sensors are composed of a speed sensor, a torque sensor, a pressure sensor and a temperature sensor.

6. The twin-screw plastic extruder according to claim 1, characterized in that: The feed thermoplastic regulating component (3) comprises: A feed end (301), a condensation slowing staggered plate (302), a cooling shell (303) and a rotating connection chamber (304), wherein the condensation slowing staggered plate (302) is installed inside the feed end (301), the cooling shell (303) is installed at the bottom of the feed end (301), the rotating connection chamber (304) is located at the center end of the cooling shell (303) and there is a material gap (305) therebetween, the side end of the rotating connection chamber (304) is installed with a regulating drive pulley structure (306), and the rotating connection Multiple groups of first contact heat conducting plates (307) and second contact heat conducting plates (308) are respectively installed on the outer peripheral side of the cavity (304); the width of the multiple groups of second contact heat conducting plates (308) is greater than that of the multiple groups of first contact heat conducting plates (307); the side ends of the rotating connection cavity (304) are respectively connected to a cooling liquid riser pipe (309) and a heat exchange circulation pipe (3090) through a rotor structure; the bottoms of the cooling liquid riser pipe (309) and the heat exchange circulation pipe (3090) are both connected to the top side end of the circulating heat exchange pump box (8).

7. The twin-screw plastic extruder according to claim 1, characterized in that: The extrusion regulating component (4) comprises: A transverse base adjustment rail (401), a bearing slide bar frame (402), a pulley drive structure (403) and a rotatably connected rotation rod (405); the pulley drive structure (403) is installed on the top of the bearing slide bar frame (402); the bearing slide bar frame (402) is located inside the transverse base adjustment rail (401) for sliding adjustment; and a connecting rod body (404) is fastened to the top of the bearing slide bar frame (402).

8. The twin-screw plastic extruder according to claim 7, characterized in that: A plurality of extrusion head frames (406) are arranged around the circumference of the rotatably connected rotation rod (405), and a sealing interlocking plate (407) is integrally formed at the top of the plurality of extrusion head frames (406). Extrusion ends (409) are respectively arranged inside the plurality of extrusion head frames (406), and the extrusion ends (409) are composed of pipes, plates or special-shaped materials. A sealing reinforcement member (408) is arranged at the bottom side end of the plurality of extrusion head frames (406).

9. The twin-screw plastic extruder according to claim 1, characterized in that: An extrusion control end (6) is arranged at the side end of the barrel, an extrusion detection sensor (5) is arranged at the inner side end of the extrusion control end (6), and a plurality of groups of bearing brackets (7) are arranged at the bottom of the barrel.

10. The twin-screw plastic extruder according to claim 8, characterized in that: The plurality of groups of extrusion head frames (406) cooperate with the sealing interlocking plate (407) to drive the extrusion end (409) and the extrusion control end (6) to form an automatically controlled sealed connection.

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