Energy-saving normal-pressure plasticizing device for flexible high polymer material

Abstract

The invention discloses an energy-saving normal-pressure plasticizing device for a flexible high polymer material, the energy-saving normal-pressure plasticizing device comprises a plasticizing tank, a stirring structure, an electromagnetic induction heating device and a pressure reducing valve, the top of the plasticizing tank is provided with a feed port and the pressure reducing valve, and the side wall of the bottom of the plasticizing tank is provided with a discharge port; the pressure reducing valve is provided with a valve inlet and a valve outlet which are communicated with each other, the stirring structure comprises a main stirrer and an auxiliary stirrer, the main stirrer has a first stirring speed, the auxiliary stirrer has a second stirring speed, and the first stirring speed is different from the second stirring speed; the electromagnetic induction heating device is at least partially arranged on the outer side surface and the bottom surface of the plasticizing tank; wherein the flexible high polymer material is a rubber product, synthetic rubber and a mixed rubber material. The plasticizing device is efficient, energy-saving and environment-friendly, solves the industrial problems of high pollution and high energy consumption, and has extremely high application value.

Description

Technical Field

[0001] This application relates to the field of flexible polymer material processing technology, specifically to an energy-saving atmospheric pressure plasticizing device for flexible polymer materials. Background Technology

[0002] The production of reclaimed rubber is a crucial area of ​​resource recycling. Its core process involves plasticizing (also known as desulfurization) to decouple the network structure of vulcanized rubber and restore its plasticity. The performance of the plasticizing unit directly determines the quality, production efficiency, and environmental impact of the reclaimed rubber. Currently, the industry's commonly used plasticizing technology mainly relies on dynamic desulfurization tank processes, which require high pressure and high temperature conditions. While high-pressure, high-temperature plasticizing units can achieve relatively fast plasticizing rates, they require complex pressure-bearing equipment and high-pressure control systems. This results in high equipment purchase and maintenance costs, and the need to continuously maintain a high-pressure environment during production leads to high energy consumption. Furthermore, the operational safety risks under high-pressure conditions are significantly increased. To meet the growing market demand and increasingly stringent environmental requirements, developing a new type of plasticizing unit that can achieve efficient and uniform plasticizing under normal pressure conditions while significantly reducing energy consumption and ensuring product quality has become a critical technological challenge that urgently needs to be addressed in the industry. Summary of the Invention

[0003] The purpose of this application is to provide an energy-saving, atmospheric pressure plasticizing device for flexible polymer materials, to solve the problems mentioned in the background art. This objective can be achieved by the following methods: This application provides an energy-saving atmospheric pressure plasticizing device for flexible polymer materials, comprising: A plasticizing tank, wherein the top of the plasticizing tank is provided with an inlet and a pressure reducing valve, and the bottom side wall of the plasticizing tank is provided with an outlet; the pressure reducing valve has a valve inlet and a valve outlet that are interconnected, the pressure reducing valve is fluidly connected to the plasticizing tank through the valve inlet, and the pressure reducing valve is configured to: when the pressure in the plasticizing tank exceeds a predetermined pressure, discharge the gas in the plasticizing tank through the valve outlet to other subsequent devices; A stirring structure, wherein the output end of the stirring structure extends into the plasticizing tank to stir the material inside the plasticizing tank, the stirring structure includes a main stirrer and an auxiliary stirrer, the main stirrer has a first stirring speed, the auxiliary stirrer has a second stirring speed, and the first stirring speed and the second stirring speed are different; An electromagnetic induction heating device is at least partially disposed on the outer side and bottom surface of the plasticizing tank, and the electromagnetic induction heating device is used to heat the material inside the plasticizing tank; The flexible polymer materials refer to polymer-related materials with flexible properties, specifically rubber products (e.g., tires, rubber hoses, rubber sheets, rubber belts, rubber miscellaneous parts, etc.), synthetic rubber (e.g., styrene-butadiene rubber, cis-butadiene rubber, isoprene rubber, butyl rubber, etc.), and mixed rubber materials (products made by mixing natural rubber and synthetic rubber (synthetic rubber types include styrene-butadiene rubber, cis-butadiene rubber, isoprene rubber, butyl rubber, etc.) in a specific ratio).

[0004] The main agitator includes a first drive assembly, a first rotating shaft, a first mechanical seal, and a blade assembly. The first drive assembly is installed above the top of the plasticizing tank. The power output end of the first drive assembly is connected to the first rotating shaft. The first rotating shaft passes through the first mechanical seal above the top of the plasticizing tank from top to bottom and extends into the interior of the plasticizing tank. The blade assembly is installed on the part of the first rotating shaft that extends into the interior of the plasticizing tank.

[0005] In one embodiment, the first drive assembly includes a first drive motor and a first reducer. The first drive motor and the first reducer are fixedly connected above the top of the plasticizing tank. The lower end of the first drive motor is connected to the first reducer in a transmission connection, and the output end of the first reducer is connected to the first rotating shaft.

[0006] In one embodiment, the blade assembly includes at least a first blade and a second blade, the first rotating shaft passes through the first blade and the second blade, and the first blade and the second blade are staggered at intervals in the extension direction of the first rotating shaft, and the second blade is positioned higher than the first blade.

[0007] The first impeller is an anchor-type stirring blade or a frame-type stirring blade, and the extension plane of the first impeller is set at a preset angle to the bottom plane of the plasticizing tank; the second impeller is a paddle-type stirring blade or a propeller-type stirring blade, the lateral length of the second impeller is shorter than the lateral length of the first impeller, and the extension plane of the second impeller is set at an angle to the radial plane of the first rotating shaft, and the second impeller and the first impeller have the same tilt direction.

[0008] In one embodiment, a predetermined gap is left between the bottom of the first blade and the inner bottom of the plasticizing tank, and a predetermined gap is left between the side of the first blade and the inner sidewall of the plasticizing tank.

[0009] The auxiliary stirrer includes a second drive assembly, a second rotating shaft, a second mechanical seal device, and stirring blades. The second drive assembly is installed above the top of the plasticizing tank. The power output end of the second drive assembly is connected to the second rotating shaft. The second rotating shaft passes through the second mechanical seal device above the top of the plasticizing tank from top to bottom, extends into the interior of the plasticizing tank, and is fixedly connected to the stirring blades. The bottom of the stirring blades connected to the second rotating shaft is higher than the top of the blade assembly connected to the first rotating shaft.

[0010] In one embodiment, the number of stirring blades is multiple sets, and the multiple sets of stirring blades are spaced apart along the extension direction of the second rotating shaft.

[0011] The second drive assembly includes a second drive motor and a second reducer. The second drive motor and the second reducer are fixedly connected above the top of the plasticizing tank. The lower end of the second drive motor is connected to the second reducer for transmission, and the output end of the second reducer is connected to the second rotating shaft.

[0012] In one embodiment, there are multiple auxiliary stirrers, which are evenly distributed around the main stirrer.

[0013] In one embodiment, the first drive motor and the second drive motor are independently explosion-proof variable frequency motors or other equivalent motors capable of performing this function.

[0014] In one embodiment, the first mechanical seal device and the second mechanical seal device each independently include a cooling circulation system and an oil lubrication system; the cooling circulation system ensures the structural safety of the shaft and its components by controlling the temperature; the oil lubrication system extends the seal life by reducing friction and also plays an auxiliary sealing role, together constituting the protective core of the mechanical seal device.

[0015] The electromagnetic induction heating device includes a heat insulation layer, an electromagnetic coil, and a shielding layer. The heat insulation layer tightly wraps around the outer side and bottom of the plasticizing tank. The electromagnetic coil is evenly wound around the outer periphery of the heat insulation layer to ensure that the plasticizing tank is affected by a uniform electromagnetic field, thereby achieving uniform heating. The shielding layer surrounds the outside of the electromagnetic coil, serving as a protective layer to provide physical protection for the internal electromagnetic coil, preventing it from being damaged by mechanical impacts or other external factors. At the same time, it can effectively isolate the electromagnetic interference generated by the electromagnetic coil, ensuring that external equipment is not interfered with.

[0016] In one embodiment, the electromagnetic coil includes at least a first set of electromagnetic coils and a second set of electromagnetic coils that are independently controlled. The first set of electromagnetic coils is located on the outer side of the plasticizing tank, and the second set of electromagnetic coils is located on the bottom surface of the plasticizing tank.

[0017] In one embodiment, the energy-saving atmospheric pressure plasticizing device further includes a first control unit and a second control unit, wherein the first control unit is connected to the first set of electromagnetic coils and the second control unit is connected to the second set of electromagnetic coils.

[0018] In one embodiment, the energy-saving atmospheric pressure plasticizing device for flexible polymer materials may further include a controller, which is configured to: when the pressure inside the plasticizing tank exceeds the predetermined pressure, control the pressure reducing valve to open and reduce the pressure inside the plasticizing tank to the predetermined pressure range.

[0019] In one embodiment, the energy-saving atmospheric pressure plasticizing device for flexible polymer materials adopts full PLC automated control (such as automatic sample feeding, automatic pressure reduction when the predetermined pressure is exceeded, and automatic start of the stirring structure), which improves the level of intelligence, reduces labor intensity, and reduces labor costs.

[0020] In one embodiment, the top of the plasticizing tank is also provided with a herringbone hole.

[0021] In one embodiment, the feed inlet at the top of the plasticizing tank may be one or more.

[0022] The use of prefixes such as "first" and "second" in this application is solely for distinguishing different descriptive objects and does not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes to distinguish descriptive objects in this application does not constitute a limitation on the described objects. The description of the described objects is found in the context of the claims or embodiments, and should not be construed as an unnecessary restriction due to the use of such prefixes.

[0023] In the description of this application, "multiple" or "multiple groups" means at least two or two groups.

[0024] Based on common knowledge in the field, the above-mentioned preferred units can be combined arbitrarily to obtain various preferred embodiments of this application.

[0025] The positive and progressive effects of this application are as follows: 1. The stirring structure of this plasticizing device ensures that the materials in the plasticizing tank are thoroughly and evenly stirred, sheared against each other, and quickly and evenly contact the heat transferred from the plasticizing tank wall, increasing the heating probability and accelerating the plasticizing process; 2. This plasticizing unit uses an electromagnetic induction heating device as the heat source to provide heat to the plasticizing tank. Its core advantage lies in its unique energy transfer method—a non-contact internal heat source—which ensures that the temperature is uniform throughout the plasticizing tank, both inside and out. Furthermore, this heating method is highly efficient, heats up quickly, and easily reaches the required maximum temperature. After heating, the plasticizing tank comes into direct contact with the material, and heat is directly transferred to the material for heating. This results in high heating efficiency, low energy consumption, improved production efficiency, and significant energy savings. It represents a revolutionary breakthrough in efficiency, control, environmental protection, and safety. 3. This plasticizing device uses a pressure reducing valve. When the pressure exceeds the predetermined pressure (atmospheric pressure), it will automatically release the pressure to other subsequent devices (the heat-insulated reaction device connected to the plasticizing tank), realizing energy reuse and zero emissions, and avoiding safety hazards caused by pressure. 4. This plasticizing device is highly efficient, energy-saving, and environmentally friendly, solving the industry pain points of high pollution and high energy consumption, and has extremely high application value. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the plasticizing apparatus according to an embodiment of this application; Figure 2 This is a top view of the plasticizing apparatus according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures: 1-Plasticizing tank; 11-Inlet; 12-Outlet; 2-Stirring structure; 21-Main stirrer; 211-First drive assembly; 211a-First drive motor; 211b-First reducer; 212-First shaft; 213-First mechanical seal; 214-First impeller; 215-Second impeller; 22-Auxiliary stirrer; 221-Second drive assembly; 221a-Second drive motor; 221b-Second reducer; 222-Second shaft; 223-Second mechanical seal; 224-Stirring blade; 3-Electromagnetic induction heating device; 31-Heat insulation layer; 32-Electromagnetic coil; 321-First set of electromagnetic coils; 322-Second set of electromagnetic coils; 33-Shielding layer; 4-Pressure reducing valve; 5-Controller; 6-Hinge hole. Detailed Implementation

[0028] The technical solutions of this application are further described clearly and completely below through embodiments, but this does not limit the application to the scope of the embodiments described. Experimental methods in the following embodiments that do not specify specific conditions are based on conventional methods and conditions, or selected according to the product manual. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] Please also refer to Figures 1 to 2 This embodiment provides an energy-saving atmospheric pressure plasticizing device for flexible polymer materials, which includes a plasticizing tank 1, a stirring structure 2, an electromagnetic induction heating device 3, and a pressure reducing valve 4. The plasticizing tank 1 is provided with a feed inlet 11 and a pressure reducing valve 4 at the top, and a discharge outlet 12 at the bottom side wall. The pressure reducing valve 4 has a valve inlet and a valve outlet that are interconnected. The pressure reducing valve 4 is fluidly connected to the plasticizing tank 1 through the valve inlet (fluid connection refers to two or more fluid systems being connected through a specific structure, allowing fluids to flow, exchange, or maintain a pressure balance). The pressure reducing valve 4 is configured to discharge the gas in the plasticizing tank 1 to other subsequent devices (a heat-insulating reaction device connected to the plasticizing tank) through the valve outlet when the pressure in the plasticizing tank 1 exceeds a predetermined pressure due to the plasticizing reaction. The energy is reused without generating any pollutants. The output end of the stirring structure 2 extends into the plasticizing tank 1 to stir the material in the plasticizing tank 1. The stirring structure 2 includes a main stirrer 21 and an auxiliary stirrer 22. The main stirrer 21 has a first stirring speed, and the auxiliary stirrer 22 has a second stirring speed. The first stirring speed and the second stirring speed are different. Different stirring speeds can make the material in the plasticizing tank fully stirred. The electromagnetic induction heating device 3 is at least partially disposed on the outer side and bottom surface of the plasticizing tank 1. The electromagnetic induction heating device 3 is used to heat the material inside the plasticizing tank 1. The flexible polymer material mentioned above refers to synthetic rubber.

[0030] The main agitator 21 includes a first drive assembly 211, a first rotating shaft 212, and a first mechanical seal device 213. The first drive assembly 211 is mounted above the top of the plasticizing tank 1. The first drive assembly 211 includes a first drive motor 211a and a first reducer 211b. The lower end of the first drive motor 211a is connected to the first reducer 211b, and the output end of the first reducer 211b is connected to the first rotating shaft 212. The first rotating shaft 212 passes through the first mechanical seal device 213 above the top of the plasticizing tank 1 from top to bottom, extending into the interior of the plasticizing tank 1. The first drive motor 211a and the first reducer 211b work together to ensure stable stirring and an adjustable speed, adapting to various speed requirements. A blade assembly is installed on the portion of the first rotating shaft 212 that extends into the plasticizing tank 1. The blade assembly includes a first blade 214 and a second blade 215, which are arranged alternately. It should be understood that the first blade 214 and the second blade 215 are spaced apart along the extension direction of the first rotating shaft 212, and the extension planes of the first blade 214 and the second blade 215 form a certain angle. Preferably, the projection of the first blade 214 onto the bottom wall of the plasticizing tank 1 and the projection of the second blade 215 onto the bottom wall of the plasticizing tank 1 intersect each other. The first blade 214 is an anchor-type stirring blade and is installed at one end of the first rotating shaft 212 near the bottom surface of the plasticizing tank 1. The bottom of the first blade 214 is positioned 3-6 mm away from the bottom surface of the plasticizing tank 1, and the side of the first blade 214 has a 3-6 mm gap with the inner wall of the plasticizing tank 1. This arrangement ensures that the first blade 214 does not contact the bottom surface of the plasticizing tank during rotation, while keeping the gap as small as possible to improve the stirring effect of the bottom material. The extended plane of the first impeller 214 forms an angle (10° to 60°) with the bottom surface of the plasticizing tank 1. This angle allows the first impeller 214 to rotate close to the bottom surface of the plasticizing tank 1, effectively scraping away material from the bottom surface. The second impeller 215, located above the first impeller 214, is a paddle-type stirring blade. The lateral length of the second impeller 215 is significantly shorter than that of the first impeller 214, and the extended plane of the second impeller 215 is set at an angle (10° to 60°) with the radial plane of the first rotating shaft 212, causing the material inside the plasticizing tank 1 to form a spiral upward flow. The second impeller 215 and the first impeller 214 are tilted in the same direction, creating a strong circulating flow field inside the plasticizing tank, achieving homogenization of the stirring and significantly improving the stirring efficiency.

[0031] The auxiliary stirrer 22 includes a second drive assembly 221, a second rotating shaft 222, a second mechanical seal device 223, and stirring blades 224. The second drive assembly 221 is installed above the top of the plasticizing tank 1. The second drive assembly 221 includes a second drive motor 221a and a second reducer 221b. The lower end of the second drive motor 221a is connected to the second reducer 221b for transmission. The output end of the second reducer 221b is connected to the second rotating shaft 222. The second rotating shaft 222 passes through the second mechanical seal device 223 above the top of the plasticizing tank 1 from top to bottom, extends into the interior of the plasticizing tank 1, and is fixedly connected to the stirring blades 224. The bottom of the stirring blades 224 connected to the second rotating shaft 222 is higher than the top of the second blades 215 connected to the first rotating shaft 212. During the stirring operation, they do not interfere with each other and cooperate with each other to fully mix, thereby improving the uniformity of the material.

[0032] The second drive assembly 221 works in conjunction with the first drive assembly 211 to meet the rate requirements of different production processes, thereby fully mixing the materials in the plasticizing tank and improving production efficiency.

[0033] In this embodiment, there are two sets of stirring blades 224, which are spaced apart along the extension direction of the second rotating shaft 222.

[0034] In this embodiment, there are three auxiliary stirrers 22, which are evenly arranged at 120° around the outer periphery of the main stirrer 21. The main stirrer and the auxiliary stirrers work together to make the material in the plasticizing tank fully and evenly stirred, sheared each other, and quickly and evenly contacted the external heat, increasing the heating probability and accelerating the plasticizing process.

[0035] In this embodiment, the first drive motor 211a and the second drive motor 221a are independently explosion-proof variable frequency motors with different power.

[0036] In this embodiment, the first mechanical seal device 213 and the second mechanical seal device 223 each independently include a cooling circulation system and an oil lubrication system; the cooling circulation system ensures the structural safety of the shaft and its components by controlling the temperature; the oil lubrication system extends the seal life by reducing friction and also plays an auxiliary sealing role. Together, they constitute the protective core of the mechanical seal device.

[0037] The electromagnetic induction heating device 3 includes a heat insulation layer 31, an electromagnetic coil 32, and a shielding layer 33. The heat insulation layer 31 tightly wraps around the outer side and bottom of the plasticizing tank 1. The electromagnetic coil 32 is evenly wound around the outer periphery of the heat insulation layer 31 to ensure that the plasticizing tank 1 is affected by a uniform electromagnetic field, thereby achieving uniform heating. The shielding layer 33 surrounds the outside of the electromagnetic coil 32. As a protective layer, it can provide physical protection for the internal electromagnetic coil 32 to prevent it from being damaged by mechanical impact or other external factors. At the same time, it can effectively isolate the electromagnetic interference generated by the electromagnetic coil 32 to ensure that external equipment is not interfered with.

[0038] The electromagnetic coil 32 includes at least a first set of electromagnetic coils 321 and a second set of electromagnetic coils 322 that are independently controlled. The first set of electromagnetic coils 321 is located on the outer side of the plasticizing tank 1, and the second set of electromagnetic coils 322 is located on the bottom surface of the plasticizing tank 1. The energy-saving atmospheric pressure plasticizing device also includes a first control unit and a second control unit. The first control unit is connected to the first set of electromagnetic coils, and the second control unit is connected to the second set of electromagnetic coils. The two independently controlled sets of coils can be turned on independently according to process requirements, or they can work together to act on the material in the plasticizing tank, so that the material in different positions in the plasticizing tank is heated evenly.

[0039] In this embodiment, the energy-saving atmospheric pressure plasticizing device also includes a controller 5, which is configured to: when the pressure in the plasticizing tank 1 exceeds the predetermined pressure (1 kPa), control the pressure reducing valve 4 to open and reduce the pressure in the plasticizing tank 1 to the predetermined pressure range.

[0040] In this embodiment, the top of the plasticizing tank 1 is also provided with a herringbone hole 6 so that workers can enter the plasticizing tank to clean the adhering substances inside the tank and inspect and replace internal components.

[0041] In this embodiment, the plasticizing tank 1 has three feed inlets 11 at the top, which are used to add adhesive powder, activator and a small amount of water respectively.

[0042] In this embodiment, the entire operation of the device is automatically controlled by a PLC (Programmable Logic Controller). Through a preset program, the actions of each execution unit are coordinated, parameters are monitored, and anomalies are fed back precisely. No continuous manual intervention is required, which effectively improves the stability, reliability, and ease of operation of the device and reduces the risk of human error. At the same time, the control logic can be flexibly adjusted according to the actual working conditions, which has strong adaptability and scalability.

[0043] Compared with existing technologies, this energy-saving atmospheric pressure plasticizing device has superior production efficiency and energy-saving advantages: Firstly, the device can plasticize approximately 800 kg of rubber powder per tank, effectively increasing the single-batch processing capacity; secondly, production tests have verified that under the same conditions for producing the same quality of recycled rubber (such as consistent raw material specifications and product indicators), the energy consumption of the device in this embodiment is about 35% lower than that of existing technologies, significantly reducing energy consumption while indirectly improving production efficiency. It has outstanding practicality and broad application prospects in the field of recycled rubber production.

Claims

1. An energy-saving atmospheric pressure plasticizing device for flexible polymer materials, characterized in that, It includes: A plasticizing tank is provided with an inlet and a pressure reducing valve at the top, and an outlet on the bottom side wall of the plasticizing tank. The pressure reducing valve has an inlet and an outlet that are interconnected. The pressure reducing valve is fluidly connected to the plasticizing tank through the inlet. The pressure reducing valve is configured to automatically discharge the gas in the plasticizing tank to other subsequent devices through the outlet when the pressure in the plasticizing tank exceeds a predetermined pressure. A stirring structure, wherein the output end of the stirring structure extends into the plasticizing tank to stir the material inside the plasticizing tank, the stirring structure includes a main stirrer and an auxiliary stirrer, the main stirrer has a first stirring speed, the auxiliary stirrer has a second stirring speed, and the first stirring speed and the second stirring speed are different; An electromagnetic induction heating device is at least partially disposed on the outer side and bottom surface of the plasticizing tank, and the electromagnetic induction heating device is used to heat the material inside the plasticizing tank; The flexible polymer material is a rubber product, synthetic rubber, or a mixed rubber material.

2. The energy-saving atmospheric pressure plasticizing device as described in claim 1, characterized in that, The main agitator includes a first drive assembly, a first rotating shaft, a first mechanical seal, and a blade assembly. The first drive assembly is installed above the top of the plasticizing tank. The power output end of the first drive assembly is connected to the first rotating shaft. The first rotating shaft passes through the first mechanical seal above the top of the plasticizing tank from top to bottom and extends into the interior of the plasticizing tank. The blade assembly is installed on the part of the first rotating shaft that extends into the interior of the plasticizing tank.

3. The energy-saving atmospheric pressure plasticizing device as described in claim 2, characterized in that, The first drive assembly includes a first drive motor and a first reducer. The lower end of the first drive motor is connected to the first reducer in a transmission connection, and the output end of the first reducer is connected to the first rotating shaft. And / or, the blade assembly includes at least a first blade and a second blade, the first shaft passes through the first blade and the second blade, and the first blade and the second blade are staggered at intervals in the extension direction of the first shaft, and the second blade is positioned higher than the first blade.

4. The energy-saving atmospheric pressure plasticizing device as described in claim 3, characterized in that, The first impeller is an anchor-type stirring blade or a frame-type stirring blade, and the extension plane of the first impeller is set at a preset angle with the bottom surface of the plasticizing tank. And / or, the second blade is a paddle-type stirring blade or a propeller-type stirring blade, the lateral length of the second blade is shorter than the lateral length of the first blade, and the extension plane of the second blade is set at an angle to the radial plane of the first rotating shaft, and the second blade and the first blade have the same tilt direction.

5. The energy-saving atmospheric pressure plasticizing device as described in claim 2, characterized in that, The auxiliary stirrer includes a second drive assembly, a second rotating shaft, a second mechanical seal device, and stirring blades. The second drive assembly is installed above the top of the plasticizing tank. The power output end of the second drive assembly is connected to the second rotating shaft. The second rotating shaft passes through the second mechanical seal device above the top of the plasticizing tank from top to bottom, extends into the interior of the plasticizing tank, and is fixedly connected to the stirring blades. The bottom of the stirring blades connected to the second rotating shaft is higher than the top of the blade assembly connected to the first rotating shaft.

6. The energy-saving atmospheric pressure plasticizing device as described in claim 5, characterized in that, The second drive assembly includes a second drive motor and a second reducer. The lower end of the second drive motor is connected to the second reducer in a transmission connection, and the output end of the second reducer is connected to the second rotating shaft. And / or, the number of stirring blades is multiple sets, and the multiple sets of stirring blades are spaced apart along the extension direction of the second rotating shaft; And / or, the number of auxiliary stirrers is multiple, and the multiple auxiliary stirrers are evenly distributed around the main stirrer.

7. The energy-saving atmospheric pressure plasticizing device as described in claim 1, characterized in that, The electromagnetic induction heating device includes a heat insulation layer, an electromagnetic coil, and a shielding layer. The heat insulation layer is tightly wrapped around the outer side and bottom of the plasticizing tank. The electromagnetic coil is evenly wound around the outer periphery of the heat insulation layer, and the shielding layer surrounds the outside of the electromagnetic coil.

8. The energy-saving atmospheric pressure plasticizing device as described in claim 7, characterized in that, The electromagnetic coil includes at least a first set of electromagnetic coils and a second set of electromagnetic coils that are independently controlled. The first set of electromagnetic coils is located on the outer side of the plasticizing tank, and the second set of electromagnetic coils is located on the bottom surface of the plasticizing tank.

9. The energy-saving atmospheric pressure plasticizing device as described in claim 8, characterized in that, The energy-saving atmospheric pressure plasticizing device also includes a first control unit and a second control unit, wherein the first control unit is connected to the first set of electromagnetic coils and the second control unit is connected to the second set of electromagnetic coils.

10. The energy-saving atmospheric pressure plasticizing device as described in claim 1, characterized in that, It also includes a controller configured to automatically open the pressure reducing valve when the pressure inside the plasticizing tank exceeds the predetermined pressure, thereby reducing the pressure inside the plasticizing tank to the predetermined pressure range.

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