Stirring and adhering device and preparation method of ultrafine powder and raw material particle mixture

Abstract

The present invention discloses a stirring and adhering device and a preparation method for a mixture of ultra-fine powder and raw material particles, belonging to the field of polymer material preparation. In the preparation method for the mixture of ultra-fine powder and raw material particles provided by the present invention, the stirring device provided by the present invention is used to adhere the ultra-fine powder to the surface of the raw material particles. On the one hand, this device uses the stirring method to replace the spinning and granulation processing technology in the prior art, simplifies the production process, reduces the production energy consumption, and reduces the dust pollution. On the other hand, through the setting of the baffle plate and the design of the powder guide tube introduction, although the structure is simple, this device solves the problem that in the stirring and adhering process of the existing similar devices, due to the reasons of stirring or the floating of hot air and the fineness of the ultra-fine powder, the ultra-fine powder floats to the inner end face of the top cover, and then the effective adhesion between the ultra-fine powder and the raw material particles cannot be completed, making the actual mixing and adhesion effective and uniform.

Description

Technical Field

[0001] The present invention relates to the field of polymer material preparation, and particularly to a stirring and adhering device and a method for preparing a mixture of ultra-fine powder and raw material particles. Background Art

[0002] Ultra-fine powder is a term for extremely fine powdery solid substances, with a size below 10 microns. In particular, nano-powders with a size between 1 - 100 nm have reached the nano-level and thus possess some excellent properties that ordinary powders do not have.

[0003] In the process of spinning to obtain fibers with different properties or in the process of plastic product processing, it is necessary to mix fine powder with corresponding functions and raw material particles (chips or powders). In the prior art, usually, the fine powder and raw material particles are first mixed and processed dry, and then the mixture is melt-extruded with a twin-screw extruder, cooled into strips with a large amount of cooling water, granulated with a granulator, and dried after granulation before finally being used for spinning into fibers or making plastic products. However, this method has high energy consumption, serious dust pollution, a complicated process, and during the subsequent secondary melting process, the particles are prone to agglomerate again and macromolecules will degrade due to secondary melting.

[0004] After considering the above problems, the inventor of this patent proposed to use a stirring method to attach ultra-fine powder to raw material particles. However, in the actual use process, it was found that since the ultra-fine powder is ultra-fine particles and the stirring and mixing need to be carried out in a heated environment, a large amount of the ultra-fine powder will float above the inner part of the stirring and adhering device under the promotion of stirring and hot air, while the raw material particles are at the inner bottom of the stirring and adhering device. Therefore, the ultra-fine powder cannot effectively adhere to the raw material particles, and the ultra-fine powder adheres to the upper part inside the stirring and adhering device, resulting in waste of the ultra-fine powder raw material, affecting the adhesion quality and wasting the ultra-fine powder raw material at the same time. Summary of the Invention

[0005] The present invention provides a stirring and adhering device and a method for preparing a mixture of ultra-fine powder and raw material particles to overcome the problems of high energy consumption, serious dust pollution, a complicated process, and easy re-agglomeration of particles and macromolecule degradation after subsequent secondary melting caused by using the method in the prior art, and also to overcome the problem that the ultra-fine powder floats and cannot effectively adhere, affecting the adhesion quality, during the stirring and mixing using the stirring device in the prior art, so as to reduce energy consumption, reduce dust, avoid the floating of the ultra-fine powder, and further improve the mixing quality of the ultra-fine powder and raw material particles.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A stirring and adhering device, which includes a stirring bin for containing materials, a stirring mechanism for stirring the materials, a heating device for heating the stirring bin, a baffle, and a powder feeding component; the rotatable part of the stirring mechanism is rotatably installed at the bottom of the stirring bin; the heating device is arranged on the stirring bin; the baffle is located inside the stirring bin and divides the stirring bin into a powder feeding area for putting ultrafine powder and a feeding area for putting raw material particles, and the bottoms of the feeding area and the powder feeding area are communicated; the powder feeding component is arranged at the top end of the stirring bin, and the powder feeding component extends into the powder feeding area.

[0008] The above-mentioned stirring and adhering device, wherein the stirring bin includes a bin body and a top cover arranged at the upper end of the bin body; the heating device is fixedly installed on the bin body; the top cover is located above the heating device; the baffle is installed inside the bin body, and the baffle divides the bin body into the feeding area and the powder feeding area.

[0009] The above-mentioned stirring and adhering device, wherein the stirring mechanism includes a motor and a stirring paddle fixed on the output shaft of the motor; the stirring paddle is rotatably connected to the bottom end of the bin body and is located inside the bin body; the motor is located at the bottom of the bin body.

[0010] The above-mentioned stirring and adhering device, wherein a viewing window for observing the situation inside the bin body is arranged on the top cover.

[0011] The above-mentioned stirring and adhering device, wherein a temperature measuring device for monitoring the temperature inside the stirring bin is arranged on the top cover.

[0012] The above-mentioned stirring and adhering device, wherein the heating device is a heating jacket.

[0013] The above-mentioned stirring and adhering device, wherein the powder feeding component includes a powder guiding pipe and a funnel communicated with the powder guiding pipe, the funnel is arranged above the top cover, and the powder guiding pipe located below the funnel penetrates through the top cover and the lower end extends into the powder feeding area.

[0014] The above-mentioned stirring and adhering device, wherein a thimble valve or a slide valve is arranged inside the discharge pipe; the thimble valve or the slide valve can close the discharge pipe.

[0015] The above-mentioned stirring and adhering device, wherein the bottom of the bin body is in the shape of an inverted frustum, and the discharge pipe is installed on the side wall of the inverted frustum-shaped bottom of the bin body.

[0016] The above-mentioned stirring and adhering device, wherein a discharge pipe is arranged at the bottom of the bin body in the feeding area.

[0017] A preparation method for a mixture of ultra-fine powder and raw material particles, wherein the stirring and adhering device as described above is adopted, including:

[0018] (1) Put the raw material particles into the feeding area of the stirring bin of the stirring and adhering device;

[0019] (2) Use the heating device to heat and stir the raw material particles in the stirring bin until the temperature in the stirring bin reaches the softening point temperature of the raw material particles, and then stop heating;

[0020] (3) Add the ultra-fine powder into the powder feeding area of the stirring bin through the powder feeding component of the stirring and adhering device, and continuously stir to make the ultra-fine powder adhere to the surface of the raw material particles, thus completing the preparation of the mixture of ultra-fine powder and raw material particles.

[0021] For the above preparation method of the mixture of ultra-fine powder and raw material particles, when the raw material particle material is polyester PET, the temperature of the softening point is 238°C - 240°C; when the raw material particle material is linear high-density polyethylene PE, the temperature of the softening point is 100°C - 115°C; when the raw material particle material is isotactic polypropylene PP, the temperature of the softening point is 140°C - 160°C; when the raw material particle material is nylon 6 - PA6, the temperature of the softening point is 180°C; when the raw material particle material is nylon 66 - PA66, the temperature of the softening point is 230°C - 235°C; when the raw material particle material is polyphenylene sulfide PPS, the temperature of the softening point is 258°C - 262°C; when the raw material particle material is vinylon, the temperature of the softening point is 220°C - 230°C; when the raw material particle material is polyvinyl chloride, the temperature of the softening point is 140°C - 160°C.

[0022] The above technical solution has the following advantages or beneficial effects:

[0023] In the preparation method of the mixture of ultra-fine powder and raw material particles provided by the present invention, the stirring device provided by the present invention is used to adhere the ultra-fine powder to the surface of the raw material particles. On the one hand, this device uses the stirring method to replace the spinning and granulation processing technology in the prior art, simplifies the production process, reduces production energy consumption, and reduces dust pollution. On the other hand, through the setting of the baffle block and the design of the introduction of the powder guide pipe, although the structure is simple, it solves the problem that in the prior art similar devices, due to the floating of hot air and the fineness of the ultra-fine powder, the ultra-fine powder floats to the inner end face of the top cover during the stirring and adhering process, and then the effective adhesion of the ultra-fine powder and the raw material particles cannot be completed, making the actual mixing and adhesion effective and uniform. Description of the Drawings

[0024] The present invention, its features, shape and advantages will become more apparent by reading the following detailed description of non - restrictive embodiments with reference to the accompanying drawings. In all the drawings, the same reference numerals indicate the same parts, and the drawings are not drawn to scale deliberately, with the emphasis on showing the gist of the present invention.

[0025] Figure 1 is an exploded structural schematic diagram of a stirring and adhering device for ultra - fine powder - attached raw material particles provided in Embodiment 1 of the present invention;

[0026] Figure 2 is an isometric schematic diagram of one perspective of a stirring and adhering device for ultra - fine powder - attached raw material particles provided in Embodiment 1 of the present invention;

[0027] Figure 3 is an isometric schematic diagram of another perspective of a stirring and adhering device for ultra - fine powder - attached raw material particles provided in Embodiment 1 of the present invention;

[0028] Figure 4 is an isometric schematic diagram of a stirring and adhering device for ultra - fine powder - attached raw material particles provided in Embodiment 1 of the present invention without the top cover;

[0029] Figure 5 is a top view of a stirring and adhering device for ultra - fine powder - attached raw material particles provided in Embodiment 1 of the present invention without the top cover;

[0030] Figure 6 is an isometric schematic diagram of the bin body of a stirring and adhering device for ultra - fine powder - attached raw material particles provided in Embodiment 1 of the present invention;

[0031] Figure 7 is an isometric schematic diagram of the assembly of the bin body and the baffle of a stirring and adhering device for ultra - fine powder - attached raw material particles provided in Embodiment 1 of the present invention;

[0032] Figure 8 is an isometric schematic diagram of the stirring paddle of a stirring and adhering device for ultra - fine powder - attached raw material particles provided in Embodiment 1 of the present invention. Detailed Embodiments

[0033] The following is a further detailed description of the specific embodiments of the present invention with reference to the accompanying drawings and descriptions of the embodiments, aiming to help those skilled in the art have a more complete, accurate and in - depth understanding of the concept and technical solution of the present invention, and to facilitate its implementation, but not as a limitation to the present invention.

[0034] Embodiment 1:

[0035] As Figures 1 to 8As shown in the figure, the stirring and adhering device provided in Embodiment 1 of the present invention includes a stirring bin 1 for containing materials, a stirring mechanism 2 for stirring the materials, a heating device 3 for heating the stirring bin 1, a baffle 4, and a powder feeding assembly 5; the rotatable part of the stirring mechanism 2 is rotatably installed at the bottom of the stirring bin 1; the heating device 3 is arranged on the stirring bin 1; the baffle 4 is located inside the stirring bin 1 and divides the stirring bin 1 into a powder feeding area 12-01 for putting in ultra-fine powder and a feeding area 12-02 for putting in raw material particles, and the bottoms of the feeding area 12-02 and the powder feeding area 12-01 are communicated; the powder feeding assembly 5 is arranged at the top end of the stirring bin 1, and the powder feeding assembly 5 extends into the powder feeding area 12-01.

[0036] Further, the stirring bin 1 includes a bin body 12 and a top cover 13 arranged at the upper end of the bin body 12, and further includes a support seat 11 for supporting the bin body 12; a fixed support ring 12-1 is arranged on the periphery of the bin body 12. For the convenience of disassembly and assembly, a part of the fixed support ring 12-1 of the bin body 12 is fixedly installed at the upper end of the support seat 11 by screws, and the heating device 3 is fixedly installed on the fixed support ring 12-1 of the bin body 12 by screws; the top cover 13 is located above the heating device 3, and the top cover 13 is hinged to the upper end of the heating device 3; the baffle 4 is installed inside the bin body 12, and the baffle 4 divides the bin body 12 into the feeding area 12-02 and the powder feeding area 12-01. The inside of the stirring bin 1 is heated by the heating device 3. After the ultra-fine powder is put into the powder feeding area 12-01, the ultra-fine powder will float under the push of stirring or generated hot air. However, due to the setting of the baffle 4, the ultra-fine powder will only float above the powder feeding area 12-01. Due to the limitation of the area, most of the ultra-fine powder will enter the feeding area 12-02 through the communication part at the bottom end of the powder feeding area 12-01, so that the ultra-fine powder can effectively adhere to the raw material particles placed at the bottom end of the bin body 12, improving the mixing quality and reducing the waste of ultra-fine powder.

[0037] Furthermore, the stirring mechanism 2 includes a motor 21 and a stirring paddle 22 fixed to the output shaft of the motor 21; the stirring paddle 22 is rotatably connected to the bottom end of the bin body 12 and is located inside the bin body 12; the motor 21 is located at the bottom of the bin body 12. In this embodiment, the motor 21 and the stirring paddle 22 are specifically a reduction motor 21 and a cross stirring paddle 22. The reduction motor 21 is fixedly installed on the support base 11, and the cross stirring paddle 22 is driven to rotate by the reduction motor 21 to achieve stirring of the material. A rotating bearing 12-2 rotatably connected to the cross stirring paddle 22 is installed at the central position of the bottom end of the bin body 12, which improves the stability and reliability of the rotation of the stirring mechanism 2 during the stirring process.

[0038] In addition, in this embodiment, eight stirring rods 22-1 are vertically and evenly distributed on the cross section of the cross of the cross stirring paddle 22. The arrangement of the stirring rods 22-1 plays a role in suppressing the occurrence of cross adhesion of the material during the stirring process to a certain extent.

[0039] Furthermore, a viewing window 13-1 for observing the situation inside the bin is provided on the top cover 13. The stirring situation of the ultrafine powder and the raw material particles can be observed through the viewing window 13-1, and it can be determined whether the stirring and adhesion have been completed.

[0040] Furthermore, a temperature measuring device 13-2 for monitoring the temperature inside the stirring bin 1 is provided on the top cover 13. In this embodiment, the temperature measuring device 13-2 specifically used is a digital temperature measuring device 13-2 that is convenient for direct reading.

[0041] Furthermore, the heating device 3 is a heating jacket 3. Four fixing ears 31 are evenly distributed on the periphery of the heating jacket 3. In this embodiment, the heating jacket 3 is sleeved on the bin body 12, and then the heating jacket 3 is fixedly installed on the fixed support ring 12-1 of the bin body 12 by screws at the position of the fixing ears 31. The heating jacket 3 directly heats the bin body 12 to achieve indirect heating of the raw material particles contained in the bin body 12, so that the raw material particles are softened. In addition, the heating jacket 3 itself uses an electric heating working method, and there is a problem of service life. The heating jacket 3 and the bin body 12 are two relatively independent parts and are connected in a detachable manner, which is convenient for maintenance and replacement, and avoids the scrapping of the entire stirring and adhesion device due to the scrapping of the heating device 3.

[0042] When the raw material particles are materials with a low softening point such as PE, the frictional heat generated by high-speed stirring and mixing of the ultrafine powder can soften the raw material particles with a low softening point such as PE. At this time, the heating jacket 3 can be not powered on for heating.

[0043] Further, the powder feeding assembly 5 includes a powder guiding pipe 51 and a funnel 52 communicated with the powder guiding pipe 51. The funnel 52 is arranged above the top cover 13. The powder guiding pipe 51 located below the funnel 52 penetrates through the top cover 13 and its lower end extends into the powder feeding area 12-01. The funnel 52 and the upper end of the powder guiding pipe 51 are connected by threads. The structure of the powder feeding assembly 5 can better feed the ultrafine powder into the inner bottom end of the bin 12 on one hand, and reduce the occurrence of powder scattering and leakage of the ultrafine powder on the other hand, avoiding unnecessary waste of the ultrafine powder.

[0044] Furthermore, a discharge pipe 12-3 is arranged at the bottom of the bin 12 in the feeding area 12-02.

[0045] Furthermore, a thimble valve 12-32 is arranged inside the discharge pipe 12-3. The thimble valve 12-32 is a common valve body structure in the prior art and can be directly purchased on the market. Its structural features and working principle are understood by those skilled in the art. The thimble valve 12-32 is installed on the discharge pipe 12-3. When the thimble mechanism of the thimble valve 12-32 is pushed in, the end part of the thimble valve 12-32 located inside the discharge pipe 12-3 can block the feeding end of the discharge pipe 12-3 inside the bin 12, so that the raw material particles put into the bin 12 will not fall into the discharge pipe 12-3 without being mixed with the ultrafine powder. The setting of the thimble valve 12-32 is also to form a relatively closed stirring environment for this stirring and attaching device. When the thimble mechanism of the thimble valve 12-32 retracts, the material can fall out from the discharge port 12-31 of the discharge pipe 12-3.

[0046] Furthermore, the bottom of the bin 12 is in the shape of an inverted frustum of a cone, and the discharge pipe 12-3 is installed on the side wall of the inverted frustum-shaped bottom of the bin 12, which is convenient for discharging the stirred, mixed and attached materials.

[0047] Example 1 of the present invention also provides a method for preparing a mixture of ultrafine powder and raw material particles. Using the stirring and adhering device provided in Example 1 of the present invention, first, the discharge pipe 12-3 is closed through the thimble valve 12-32. Subsequently, the top cover 13 is opened, and then the raw material particles are put into the feeding area 12-02 of the bin 12. Then, the top cover 13 is covered. Subsequently, the heating jacket 3 is started, so that the heating jacket 3 directly heats the bin 12 (the bin 12 can specifically be made of aluminum alloy with excellent heat conduction), thereby indirectly heating the raw material particles in the bin 12. During the preheating process, the temperature inside the bin 12 can be observed in real time through the digital thermometer 13-2. Immediately afterwards, the reduction motor 21 is started, and the reduction motor 21 drives the cross stirring paddle 22 to rotate. Thus, the cross stirring paddle 22 stirs the added raw material particles, so that the raw material particles are quickly and evenly heated to the corresponding appropriate temperature (the appropriate temperature refers to the softening point temperature of the raw material particles), realizing the heating and softening of the raw material particles. Subsequently, the ultrafine powder is poured from the funnel 52, and the ultrafine powder then enters the powder feeding area 12-01 of the bin 12 through the powder guiding pipe 51. Under the shielding of the baffle 4 and the guiding of the extension of the powder guiding pipe 51, and in addition, due to the relatively narrow setting of the powder feeding area 12-01, a large amount of floating and aggregation of the ultrafine powder cannot be formed. Therefore, the ultrafine powder will enter the inner bottom end of the feeding area 12-02 of the bin 12 from the connection between the powder feeding area 12-01 and the feeding area 12-02. Driven by the stirring of the stirring paddle 22, the ultrafine powder will gradually complete the effective adhesion to the raw material particles. Through the viewing window 13-1, when the ultrafine powder is evenly and fully mixed and adhered to the softened raw material particles (that is, the ultrafine powder is evenly adhered to the outer surface of the raw material particles), the pipeline of the discharge pipe can be opened through the thimble valve 12-32. Driven by the continuous rotation of the stirring paddle 22, the mixed and adhered material can fall out from the discharge port 12-31 along the discharge pipe 12-3. In summary, on the one hand, this device uses the stirring method to replace the double-screw melt extrusion granulation processing technology in the prior art, simplifies the production process, reduces the production energy consumption, reduces the dust pollution, and more importantly, avoids the re-agglomeration of particles and the degradation of macromolecules caused by secondary melting. On the other hand, through the setting of the baffle 4 and the design of the introduction of the powder guiding pipe 51, although the structure is simple, it solves the problem that in the prior art similar devices, due to the floating of hot air and the fineness of the ultrafine powder, the ultrafine powder floats to the inner end face of the top cover 13 during the stirring and adhering process, and then the effective adhesion between the ultrafine powder and the raw material particles cannot be completed, making the actual mixing and adhesion effective and uniform.

[0048] It should be noted that the reduction motor 21, the heating jacket 3, the digital thermometer 13-2, and the thimble valve 12-32 mentioned in this embodiment can be directly purchased in the existing market and can be directly used according to the specific usage instructions.

[0049] In this embodiment, the raw material particles may specifically be different types of chips such as polyester chips, nylon chips, and polyolefin chips, or they may be ultra-high molecular weight polyethylene powder; the ultra-fine powder may specifically be ultra-fine powders such as calcium carbonate, lithium chloride, carbon nanotubes, graphene, zinc sulfate, aluminum trioxide, and iron trioxide.

[0050] In the method for preparing the mixture of ultra-fine powder and raw material particles provided in Embodiment 1 of the present invention, when the raw material particle material is polyester PET, the softening point temperature is 238°C - 240°C; when the raw material particle material is linear high-density polyethylene PE, the softening point temperature is 100°C - 115°C; when the raw material particle material is isotactic polypropylene PP, the softening point temperature is 140°C - 160°C; when the raw material particle material is nylon 6 - PA6, the softening point temperature is 180°C; when the raw material particle material is nylon 66 - PA66, the softening point temperature is 230°C - 235°C; when the raw material particle material is polyphenylene sulfide PPS, the softening point temperature is 258°C - 262°C; when the raw material particle material is vinylon, the softening point temperature is 220°C - 230°C; when the raw material particle material is polyvinyl chloride, the softening point temperature is 140°C - 160°C.

[0051] In summary, in the method for preparing the mixture of ultra-fine powder and raw material particles provided in Embodiment 1 of the present invention, the stirring device provided in Embodiment 1 of the present invention is used to attach the ultra-fine powder to the surface of the raw material particles. On the one hand, this device uses the stirring method to replace the spinning and granulation processing technology in the prior art, simplifies the production process, reduces production energy consumption, and reduces dust pollution. On the other hand, through the setting of the baffle and the design of the powder guide pipe introduction, although the structure is simple, it solves the problem that in the prior art similar devices, due to reasons such as stirring or hot air floating and the fineness of the ultra-fine powder, the ultra-fine powder floats to the inner end face of the top cover during the stirring and attachment process, and then the effective attachment of the ultra-fine powder and the raw material particles cannot be completed, making the actual mixing and attachment effective and uniform.

[0052] Those skilled in the art should understand that those skilled in the art can implement the said variation examples in combination with the prior art and the above embodiments, which will not be elaborated here. Such variation examples do not affect the essence of the present invention and will not be elaborated here.

[0053] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A stirring and adhering device, characterized in that, It includes a stirring bin for containing materials, a stirring mechanism for stirring the materials, a heating device for heating the stirring bin, a baffle, and a powder feeding assembly; the stirring bin includes a bin body and a top cover arranged at the upper end of the bin body; the rotatable part of the stirring mechanism is rotatably installed at the bottom of the stirring bin; the heating device is arranged on the stirring bin; the baffle is located inside the stirring bin and divides the stirring bin into a powder feeding area for putting ultrafine powder and a feeding area for putting raw material particles, and the bottoms of the feeding area and the powder feeding area are communicated; the powder feeding assembly is arranged at the top end of the stirring bin, and the powder feeding assembly extends into the powder feeding area. Among them, the heating device is fixedly installed on the bin body; the top cover is located above the heating device; the baffle is installed inside the bin body, and the baffle divides the bin body into the feeding area and the powder feeding area; the volume of the powder feeding area is smaller than the volume of the feeding area.

2. The stirring and adhering device according to claim 1, characterized in that, The stirring mechanism includes a motor and a stirring paddle fixed on the output shaft of the motor; the stirring paddle is rotatably connected to the bottom end of the bin body and is located inside the bin body; the motor is located at the bottom of the bin body.

3. The stirring and adhering device according to claim 1, wherein, A viewing window for observing the situation inside the bin body is arranged on the top cover.

4. The stirring and adhering device according to claim 1, characterized in that, A temperature detector for monitoring the temperature inside the stirring bin is arranged on the top cover.

5. The stirring and adhering device according to claim 1, characterized in that The heating device is a heating jacket.

6. The stirring and adhering device according to claim 1, wherein, The powder feeding assembly includes a powder guiding pipe and a funnel communicated with the powder guiding pipe. The funnel is arranged above the top cover, and the powder guiding pipe located below the funnel penetrates through the top cover and the lower end extends into the powder feeding area.

7. The stirring and adhering device according to claim 1, wherein A discharge pipe is arranged at the bottom of the bin body in the feeding area.

8. A method for preparing a mixture of ultra-fine powder and raw material particles, characterized in that, Using the stirring and adhering device as described in any one of claims 1-7, including: (1) Putting the raw material particles into the feeding area of the stirring bin of the stirring and adhering device; (2) Using the heating device to heat and stir the raw material particles in the stirring bin until the temperature in the stirring bin reaches the softening point temperature of the raw material particles, and then stop heating; (3) Adding the ultrafine powder into the powder feeding area of the stirring bin through the powder feeding assembly of the stirring and adhering device and continuously stirring to make the ultrafine powder adhere to the surface of the raw material particles, thus completing the preparation of the mixture of the ultrafine powder and the raw material particles.

9. The preparation method of the superfine powder and raw material particle mixture according to claim 8, characterized in that, When the raw material particle material is polyester PET, the temperature of the softening point is 238°C - 240°C; when the raw material particle material is linear high-density polyethylene PE, the temperature of the softening point is 100°C - 115°C; when the raw material particle material is isotactic polypropylene PP, the temperature of the softening point is 140°C - 160°C; when the raw material particle material is nylon 6 - PA6, the temperature of the softening point is 180°C; when the raw material particle material is nylon 66 - PA66, the temperature of the softening point is 230°C - 235°C; when the raw material particle material is polyphenylene sulfide PPS, the temperature of the softening point is 258°C - 262°C; when the raw material particle material is vinylon, the temperature of the softening point is 220°C - 230°C; when the raw material particle material is polyvinyl chloride, the temperature of the softening point is 140°C - 160°C.

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