Temperature-controlled feeder for flame retardant for epoxy resin

Abstract

The utility model relates to a kind of temperature control feeding device of flame retardant for epoxy resin, it includes: shell, feeding mechanism, temperature control mechanism and impurity removal mechanism, temperature control mechanism includes first heating unit, second heating unit, temperature sensor group and intelligent control assembly, first heating unit is arranged around the side wall of charging bin, second heating unit is arranged in the side wall of feeding cylinder;Temperature sensor group includes the first sensor being arranged in the inside of charging bin and the second sensor being arranged in the inside of feeding cylinder, for real-time monitoring the temperature of flame retardant raw material, obtains temperature signal;Intelligent control assembly is electrically connected with first heating unit, second heating unit, temperature sensor group respectively, for receiving temperature signal and independently or synchronously adjusting the working power of first heating unit and second heating unit, so that the temperature of flame retardant raw material is kept in preset temperature range;Impurity removal mechanism is provided with magnetic adsorption assembly and is arranged in the side wall of feeding cylinder, for adsorbing metal impurities in flame retardant raw material.

Description

Technical Field

[0001] This utility model belongs to the field of flame retardant feeding devices, specifically relating to a temperature-controlled feeding device for flame retardants used in epoxy resins. Background Technology

[0002] Epoxy resin, as an important polymer material, is widely used in electronics, construction, and automotive industries. Its flame-retardant properties typically depend on the flame retardants added during the preparation process. The flame retardant feeding device is a key piece of equipment in this process, affecting production efficiency and the quality of the final product. Currently, flame retardants for epoxy resins require the mixing of various raw materials before preparation. However, existing flame retardant feeding devices often focus on the basic function of material conveying, neglecting the influence of temperature on the physical state of the flame retardant. When the temperature is too low, the material's fluidity decreases significantly, making it prone to clumping or adhesion, leading to blockages in the feeding path or metering inaccuracies, causing feeding interruptions and fluctuations. Conversely, excessively high local temperatures can cause physical or chemical changes in heat-sensitive flame retardants, affecting not only their dispersibility in the epoxy resin and resulting in uneven flame-retardant effects, but also potentially interfering with the epoxy resin's curing process, ultimately directly impacting the flame-retardant consistency and stability of the epoxy resin product. Utility Model Content

[0003] To address the aforementioned problems in the existing technology, this utility model provides a temperature-controlled feeding device for flame retardants used in epoxy resins. The technical problem to be solved by this utility model is achieved through the following technical solution: This utility model provides a temperature-controlled feeding device for flame retardants used in epoxy resins, comprising: a housing, a feeding mechanism, a temperature control mechanism, and a purification mechanism. The feeding mechanism is disposed within the housing and includes a feeding hopper, a feeding cylinder, and a drive assembly. The feeding hopper stores flame retardant raw materials, and its outlet is connected to the upper end of the feeding cylinder. The feeding cylinder is inclined and has a discharge port at its lower end. The drive assembly is disposed within the feeding hopper and includes a motor and transmission components. The temperature control mechanism includes a first heating unit, a second heating unit, a temperature sensor group, and an intelligent control component. The first heating unit is arranged around the side wall of the feeding hopper, and the second heating unit is arranged... The temperature sensor group includes a first sensor located inside the feeding hopper and a second sensor located inside the feeding cylinder, used to monitor the temperature of the flame retardant raw material in real time and obtain a temperature signal; the intelligent control component is electrically connected to the first heating unit, the second heating unit, and the temperature sensor group respectively, used to receive the temperature signal and independently or synchronously adjust the working power of the first heating unit and the second heating unit to keep the temperature of the flame retardant raw material within a preset temperature range; the impurity removal mechanism is provided with a magnetic adsorption component and is located on the side wall of the feeding cylinder, used to adsorb metallic impurities in the flame retardant raw material.

[0004] In one embodiment of this utility model, the feeding bin is further provided with a stirring assembly, which is located above the driving assembly. The stirring assembly includes stirring blades. The feeding bin is cylindrical. The rotation shaft of the transmission component is arranged along the axial direction of the feeding bin. The stirring blades are paddle-type structures.

[0005] In one embodiment of this utility model, the sidewall of the feeding hopper has a double-layer structure, the first heating unit is a flexible heating strip or heating wire with an insulating layer wrapped around it, and the first heating unit is arranged around the double-layer structure of the sidewall of the feeding hopper; the sidewall of the feeding cylinder has a double-layer structure, the second heating unit is a flexible heating strip or heating wire with an insulating layer wrapped around it, and the second heating unit is attached to the double-layer structure of the sidewall of the feeding cylinder; both the sidewalls of the feeding hopper and the feeding cylinder are provided with a heat insulation layer, and the heat insulation layer is made of heat insulation material.

[0006] In one embodiment of the present invention, the second heating unit includes a fan disposed at the upper end of the feeding cylinder, the fan is provided with a heating resistor inside, and the air outlet of the fan is provided with a filter screen and is connected to the upper end of the feeding cylinder through the filter screen.

[0007] In one embodiment of this utility model, the temperature sensor group is a thermocouple sensor or a resistance temperature detector (RTD) sensor. The first sensor and the second sensor are respectively embedded in the inner sidewalls of the feeding bin and the feeding cylinder, and are connected to the intelligent control component via wires.

[0008] In one embodiment of this utility model, the motor includes a stepper motor, and the transmission component includes a screw conveyor. The stepper motor drives the screw conveyor to rotate in the feeding bin to transport the flame retardant raw material in the feeding bin to the feeding cylinder.

[0009] In one embodiment of this utility model, the magnetic adsorption component includes a plurality of electromagnets, which are spaced apart along the conveying path at the top or bottom of the feeding cylinder for adsorbing metallic impurities in the flame retardant; wherein the spacing between the electromagnets near the upper end of the feeding cylinder is greater than the spacing between the electromagnets near the lower end.

[0010] In one embodiment of this utility model, a controller is also included. The feeding mechanism, the temperature control mechanism, and the impurity removal mechanism are respectively coordinated and controlled by the controller, which is a PID controller. The preset temperature range is set through a human-machine interface module, which is disposed on the housing and includes a touch screen or buttons for inputting the preset temperature range and displaying real-time data.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention relates to a temperature-controlled feeding device for flame retardants used in epoxy resins. A first heating unit preheats and maintains the temperature of the flame retardant raw material in the feeding hopper to prevent clumping. Simultaneously, a second heating unit maintains the temperature of the flame retardant raw material along its conveying path in the feeding cylinder, ensuring its flow stability. An intelligent control component independently or synchronously adjusts the power of the two heating units based on feedback from temperature sensors in each area, ensuring that the flame retardant raw material remains within a stable temperature range throughout the entire process from storage to discharge. This fundamentally avoids the problem of poor flowability of the flame retardant raw material due to temperature, achieving continuous and smooth material conveying, significantly improving the accuracy and consistency of feeding, and thus guaranteeing the quality of the flame retardant for epoxy resins.

[0012] This invention uses a stirring assembly to ensure that the flame retardant raw materials are more uniformly distributed before entering the transmission components; both the feeding hopper and the feeding cylinder adopt a double-layer structure and are equipped with a heat insulation layer, which reduces heat loss and improves the energy efficiency of the device; the magnetic adsorption assembly uses electromagnets and is non-uniformly arranged along the feeding cylinder to effectively adsorb metal impurities, and can be cleaned by disconnecting the power after shutdown.

[0013] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a temperature-controlled feeding device for flame retardant for epoxy resin provided in an embodiment of this utility model; Figure 2 This is a structural cross-sectional view of the temperature-controlled feeding device for flame retardant of epoxy resin provided in this embodiment of the utility model. Figure 3 This is provided by the embodiment of the present utility model. Figure 2 Schematic diagram of the structure at point I; Figure 4 This is a block diagram illustrating the working principle of the temperature-controlled feeding device for flame retardant of epoxy resin provided in this embodiment of the utility model.

[0015] Reference numerals: 1-Shell; 2-Feeding mechanism; 21-Feeding bin; 22-Feeding cylinder; 23-Drive assembly; 231-Motor; 232-Transmission component; 24-Stirring assembly; 241-Stirring blade; 3-Temperature control mechanism; 31-First heating unit; 32-Second heating unit; 33-Temperature sensor group; 331-First sensor; 332-Second sensor; 34-Intelligent control assembly; 4-Impurity removal mechanism; 41-Electromagnet; 5-Controller; 6-Human-machine interface module. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description of a temperature-controlled feeding device for an epoxy resin flame retardant, in conjunction with the accompanying drawings and specific embodiments, is provided.

[0017] The foregoing and other technical contents, features, and effects of this utility model will be clearly presented in the following detailed description of the specific embodiments with reference to the accompanying drawings. Through the description of the specific embodiments, a more in-depth and specific understanding can be gained of the technical means and effects adopted by this utility model to achieve the intended purpose. However, the accompanying drawings are only provided for reference and illustration and are not intended to limit the technical solution of this utility model.

[0018] Example 1 The temperature of flame retardant raw materials directly affects their physical properties, especially flowability and adhesion. At lower temperatures, the flowability of many solid powdered or granular flame retardant raw materials deteriorates, and bridging may even occur in hoppers or pipelines, leading to unstable feeding. Simultaneously, low temperatures may also cause certain hygroscopic or functionally specific flame retardant raw materials to clump together, clogging the feeder and causing uneven feeding or even equipment shutdown. Conversely, excessively high temperatures may cause the flame retardant raw materials to soften and stick together, similarly compromising feeding stability. Therefore, controlling the feeding temperature within a stable and suitable range is crucial for ensuring continuous, stable, and precise delivery of flame retardant raw materials.

[0019] Furthermore, the physical properties of flame retardant raw materials are also affected by temperature, which can influence their performance within the epoxy resin matrix. Firstly, temperature affects the dispersibility of the flame retardant raw materials; clumps or poor flowability of the flame retardant make it difficult to disperse evenly in the epoxy resin matrix, easily forming agglomeration points and resulting in uneven flame retardant effects. Secondly, excessively high temperatures may trigger chemical changes in some flame retardants, interfering with the curing reaction of the epoxy resin and affecting the overall performance of the final product.

[0020] In view of this, the present invention provides a temperature-controlled feeding device for flame retardants for epoxy resins, which integrates a temperature control mechanism 3 into the feeding mechanism 2, thereby improving the temperature uniformity of the feeding process and ensuring that the flame retardant is fed stably within the preset temperature range.

[0021] like Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of the structure of a temperature-controlled feeding device for flame retardant for epoxy resin provided in an embodiment of this utility model; Figure 2 This is a structural cross-sectional view of the temperature-controlled feeding device for flame retardant of epoxy resin provided in this embodiment of the utility model. Figure 3 This is provided by the embodiment of the present utility model. Figure 2 Schematic diagram of the structure at point I; Figure 4 This is a block diagram illustrating the working principle of the temperature-controlled feeding device for flame retardant of epoxy resin provided in this embodiment of the utility model.

[0022] In this embodiment, the temperature-controlled feeding device for the flame retardant of epoxy resin includes: a housing 1, a feeding mechanism 2, a temperature control mechanism 3, and a purification mechanism 4. The feeding mechanism 2 is disposed within the housing 1 and includes a feeding bin 21, a feeding cylinder 22, and a drive assembly 23. The feeding bin 21 stores flame retardant raw materials, and its outlet is connected to the upper end of the feeding cylinder 22. The feeding cylinder 22 is inclined and has a discharge port at its lower end. The drive assembly 23 is disposed within the feeding bin 21 and includes a motor 231 and a transmission component 232. The temperature control mechanism 3 includes a first heating unit 31, a second heating unit 32, a temperature sensor group 33, and an intelligent control component 34. The first heating unit 31 is arranged around the side of the feeding bin 21. The second heating unit 32 is arranged on the side wall of the feeding cylinder 22; the temperature sensor group 33 includes a first sensor 331 disposed inside the feeding bin 21 and a second sensor 332 disposed inside the feeding cylinder 22, which are used to monitor the temperature of the flame retardant raw material in real time and obtain a temperature signal; the intelligent control component 34 is electrically connected to the first heating unit 31, the second heating unit 32 and the temperature sensor group 33 respectively, and is used to receive the temperature signal and independently or synchronously adjust the working power of the first heating unit 31 and the second heating unit 32 so that the temperature of the flame retardant raw material is kept within a preset temperature range; the impurity removal mechanism 4 is provided with a magnetic adsorption component and disposed on the side wall of the feeding cylinder 22, which is used to adsorb metal impurities in the flame retardant raw material.

[0023] In an optional embodiment, the temperature-controlled feeding device for the epoxy resin flame retardant further includes a controller 5, through which the feeding mechanism 2, temperature control mechanism 3, and impurity removal mechanism 4 are all coordinated and controlled. For example, the controller 5 can be a PID controller (Proportional-Integral-Derivative controller). A human-machine interface module 6 is provided on the housing 1, allowing the setting of a preset temperature range. The human-machine interface module 6 includes a touchscreen or buttons for inputting the preset temperature range and displaying real-time data.

[0024] In an optional embodiment, the motor 231 can be a stepper motor, and the transmission component 232 can be a screw conveyor. The stepper motor drives the screw conveyor to rotate in the feeding bin 21 to transport the flame retardant raw material in the feeding bin 21 to the feeding cylinder 22.

[0025] In an optional embodiment, the feeding bin 21 is further provided with a stirring assembly 24, which is located above the drive assembly 23. The stirring assembly 24 includes stirring blades 241. Exemplarily, the stirring blades 241 have a paddle-like structure, the feeding bin 21 is cylindrical, and the rotation shaft of the transmission component 232 is arranged along the axial direction of the feeding bin 21. The stirring blades 241 can be driven to rotate by an independent stirring motor.

[0026] In one optional embodiment, the sidewall of the feeding hopper 21 has a double-layer structure, and the first heating unit 31 is a flexible heating strip or heating wire, which is arranged around the double-layer structure of the sidewall of the feeding hopper 21. For example, the outside of the first heating unit 31 is wrapped with an insulating layer.

[0027] Similarly, the side wall of the feed cylinder 22 has a double-layer structure, and the second heating unit 32 is a flexible heating strip or heating wire with an insulating layer wrapped around it. The second heating unit 32 is attached to and arranged between the double-layer structure of the side wall of the feed cylinder 22.

[0028] For example, to ensure uniform temperature control, both the side walls of the feeding hopper 21 and the feeding cylinder 22 are provided with heat insulation layers, which are made of heat insulation materials, such as ceramic fiber insulation cotton.

[0029] In addition, the second heating unit 32 may also include a fan (not shown in the figure) disposed at the upper end of the feed cylinder 22. The fan is equipped with a heating resistor inside, and the air outlet of the fan is equipped with a filter screen and connected to the upper end of the feed cylinder 22 through the filter screen, so as to heat the internal environment of the feed cylinder 22 by hot air.

[0030] In an optional embodiment, the temperature sensor group 33 is a thermocouple sensor or a resistance temperature detector (RTD) sensor. The first sensor 331 and the second sensor 332 are respectively embedded in the inner sidewalls of the feeding bin 21 and the feeding cylinder 22, and are connected to the intelligent control component 34 via wires.

[0031] In an optional embodiment, the magnetic adsorption assembly includes a plurality of electromagnets 41, which are spaced apart along the conveying path at the top or bottom of the feed cylinder 22 for adsorbing metallic impurities in the flame retardant.

[0032] Preferably, the spacing between the electromagnets 41 near the upper end of the feeding cylinder 22 is greater than the spacing between the electromagnets 41 near the lower end. When the flame retardant raw material first enters the upper end of the feeding cylinder 22, the material layer is relatively thick and the flow rate is slow. At this time, the use of electromagnets 41 with a larger spacing can achieve initial adsorption and avoid affecting the flow due to the magnetic points being too dense. As the flame retardant raw material moves towards the discharge port, its flow rate increases and the material layer becomes thinner. The use of a denser arrangement of electromagnets 41 in the downstream area can filter out the remaining fine metal impurities, thereby ensuring the smooth feeding of the flame retardant raw material while taking into account the adsorption and removal effect and efficiency of metal impurities.

[0033] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0034] In this embodiment, the temperature-controlled feeding device for the flame retardant of epoxy resin has a feeding bin 21 made of stainless steel cylinder with a conical bottom; the feeding cylinder 22 is made of aluminum alloy, with a 35° inclination angle and an internal slope; the outlet of the feeding bin 21 and the upper end of the feeding cylinder 22 are sealed together by a flange.

[0035] The drive assembly 23 includes a stepper motor and a screw conveyor directly connected to it. The feeding bin 21 is also equipped with a stirring assembly 24, which includes paddle-type stirring blades 241. The stirring blades 241 are coaxially arranged with the screw conveyor and driven to rotate by the stepper motor.

[0036] Both the first heating unit 31 and the second heating unit 32 use heating strips wrapped with flexible silicone, which are tightly wrapped and embedded in special mounting grooves in the side walls of the double-layer structure of the feeding bin 21 and the feeding cylinder 22, respectively. The outer or inner layer of the side walls of the feeding bin 21 and the feeding cylinder 22 are then covered with heat insulation layers.

[0037] The temperature sensor group 33 includes two platinum resistance temperature sensors, serving as the first sensor 331 and the second sensor 332, respectively. These sensors are embedded in the lower side wall of the feeding hopper 21 and the middle side wall of the feeding cylinder 22 to monitor the core temperature of the flame retardant raw material. The intelligent control component 34 receives the signals from the sensors and adjusts the heating power of the first heating unit 31 and the second heating unit 32 respectively via two independently controlled solid-state relays.

[0038] The magnetic adsorption component of the impurity removal mechanism 4 uses seven electromagnets 41, which are embedded in the top of the feed cylinder 22 and are non-uniformly arranged along the flow direction of the flame retardant raw material: starting from the feed end, the spacing between the first three is sparser than the spacing between the last four, thus forming an adsorption area with an increasing gradient density along the flow direction.

[0039] During operation, the temperature range is preset via the touchscreen or buttons of the human-machine interface module 6. For example, the temperature in the feeding hopper 21 can be set to 35℃, and the temperature in the feeding cylinder 22 can be set to 40℃. After preheating to the preset temperature by the intelligent control component 34, powdered or granular flame retardant raw materials are fed into the feeding port above the feeding hopper 21. The controller 5 controls the stirring component 24 to mix the materials, and after mixing, controls the drive component 23 to feed the materials by screw. The flame retardant raw materials pass through the adsorption zone in a flowing state, where metallic impurities are adsorbed and removed. Finally, the flame retardant material is continuously and stably supplied to the downstream epoxy resin production line from the discharge port.

[0040] Understandably, the temperature (i.e., the preset temperature range) inside the feeding bin 21 and the feeding cylinder 22 can be adjusted according to the temperature characteristics of different flame retardant raw materials; this is only for illustration.

[0041] Throughout the feeding process, the temperature sensor group 33 continuously monitors the temperature. If temperature fluctuations occur due to environmental factors or feeding, the intelligent control component 34 will promptly adjust the heating power to compensate. After feeding is completed, the controller 5 can control the electromagnet 41 to be de-energized, causing it to lose its magnetism and thus causing the adsorbed metal impurities to fall off.

[0042] This invention relates to a temperature-controlled feeding device for flame retardants used in epoxy resins. A first heating unit preheats and maintains the temperature of the flame retardant raw material in the feeding hopper to prevent clumping. Simultaneously, a second heating unit maintains the temperature of the flame retardant raw material along its conveying path in the feeding cylinder, ensuring its flow stability. An intelligent control component independently or synchronously adjusts the power of the two heating units based on feedback from temperature sensors in each area, ensuring that the flame retardant raw material remains within a stable temperature range throughout the entire process from storage to discharge. This fundamentally avoids the problem of poor flowability of the flame retardant raw material due to temperature, achieving continuous and smooth material conveying, significantly improving the accuracy and consistency of feeding, and thus guaranteeing the quality of the flame retardant for epoxy resins.

[0043] This invention uses a stirring assembly to ensure that the flame retardant raw materials are more uniformly distributed before entering the transmission components; both the feeding hopper and the feeding cylinder adopt a double-layer structure and are equipped with a heat insulation layer, which reduces heat loss and improves the energy efficiency of the device; the magnetic adsorption assembly uses electromagnets and is non-uniformly arranged along the feeding cylinder to effectively adsorb metal impurities, and can be cleaned by disconnecting the power after shutdown.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not expressly listed. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device comprising said element. Terms such as "connected" or "linked" are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect. The orientations or positional relationships indicated by terms such as "upper," "lower," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0045] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A temperature-controlled feeding device for flame retardants used in epoxy resins, characterized in that, include: The system comprises a housing, a feeding mechanism, a temperature control mechanism, and a purification mechanism. The feeding mechanism, located within the housing, includes a feeding hopper, a feeding cylinder, and a drive assembly. The feeding hopper stores flame retardant raw materials, and its outlet is connected to the upper end of the feeding cylinder. The feeding cylinder is inclined and has a discharge port at its lower end. The drive assembly, located within the feeding hopper, includes a motor and transmission components. The temperature control mechanism includes a first heating unit, a second heating unit, a temperature sensor group, and an intelligent control component. The first heating unit is arranged around the side wall of the feeding hopper, and the second heating unit is arranged on the side wall of the feeding cylinder. The temperature sensor group includes a first sensor disposed inside the feeding hopper and a second sensor disposed inside the feeding cylinder, used to monitor the temperature of the flame retardant raw material in real time and obtain a temperature signal. The intelligent control component is electrically connected to the first heating unit, the second heating unit, and the temperature sensor group, respectively, and is used to receive the temperature signal and independently or synchronously adjust the working power of the first heating unit and the second heating unit to keep the temperature of the flame retardant raw material within a preset temperature range. The impurity removal mechanism is equipped with a magnetic adsorption component and is located on the side wall of the feeding cylinder, which is used to adsorb metallic impurities in the flame retardant raw material.

2. The temperature-controlled feeding device for flame retardant for epoxy resin according to claim 1, characterized in that, The feeding hopper is also equipped with a stirring assembly, which is located above the drive assembly. The stirring assembly includes stirring blades. The feeding hopper is cylindrical. The rotation shaft of the transmission component is arranged along the axial direction of the feeding hopper. The stirring blades are paddle-type structures.

3. The temperature-controlled feeding device for flame retardant for epoxy resin according to claim 1, characterized in that, The sidewall of the feeding hopper has a double-layer structure. The first heating unit is a flexible heating strip or heating wire with an insulating layer wrapped around it. The first heating unit is arranged around the double-layer structure of the sidewall of the feeding hopper. The sidewall of the feeding cylinder has a double-layer structure. The second heating unit is a flexible heating strip or heating wire with an insulating layer wrapped around it. The second heating unit is attached to the double-layer structure of the sidewall of the feeding cylinder. Both the sidewalls of the feeding hopper and the feeding cylinder are provided with a heat insulation layer, which is made of heat insulation material.

4. The temperature-controlled feeding device for flame retardant for epoxy resin according to claim 1, characterized in that, The second heating unit includes a fan disposed at the upper end of the feeding cylinder. The fan is equipped with a heating resistor inside, and the air outlet of the fan is equipped with a filter screen, which is connected to the upper end of the feeding cylinder.

5. The temperature-controlled feeding device for flame retardant for epoxy resin according to claim 1, characterized in that, The temperature sensor group is a thermocouple sensor or a resistance temperature detector (RTD) sensor. The first sensor and the second sensor are respectively embedded in the inner wall of the feeding hopper and the feeding cylinder, and are connected to the intelligent control component through wires.

6. The temperature-controlled feeding device for flame retardant for epoxy resin according to claim 1, characterized in that, The motor includes a stepper motor, and the transmission component includes a screw conveyor. The stepper motor drives the screw conveyor to rotate in the feeding bin to transport the flame retardant raw material in the feeding bin to the feeding cylinder.

7. The temperature-controlled feeding device for flame retardant for epoxy resin according to claim 1, characterized in that, The magnetic adsorption assembly includes multiple electromagnets, which are spaced apart at the top or bottom of the feeding cylinder along the conveying path to adsorb metallic impurities in the flame retardant; wherein the spacing between the electromagnets near the upper end of the feeding cylinder is greater than the spacing between the electromagnets near the lower end.

8. The temperature-controlled feeding device for flame retardant for epoxy resin according to claim 1, characterized in that, It also includes a controller, through which the feeding mechanism, the temperature control mechanism and the impurity removal mechanism are coordinated and controlled; the controller is a PID controller, and the preset temperature range is set through a human-machine interface module, which is located on the housing and includes a touch screen or buttons for inputting the preset temperature range and displaying real-time data.

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