Device for preparing brominated epoxy resin coated particles

Abstract

The invention relates to the field of coated particle preparation, in particular to a device for preparing brominated epoxy resin coated particles, which comprises a coating unit, a separation unit and a curing unit, the coating unit is used for completing uniform mixing of particles to be coated and brominated epoxy resin mixed liquor, lifting the particles through a lifting part and separating redundant resin mixed liquor; the separation unit comprises a separation box, a rotary drum is rotationally mounted in the separation box, and sieve holes are formed in the side wall of the rotary drum and used for completing separation and recovery of redundant mixed liquid coating the surfaces of the particles; the curing unit comprises a curing box, a vibration motor is installed on the curing box, an irradiation bin and a heating bin are arranged in the curing box, and curing of the coating layer is rapidly achieved through irradiation and hot air. The coating unit and the separation unit are arranged, so that the brominated epoxy resin is uniformly and completely coated on the surfaces of particles, and the problems of non-uniform coating and inconsistent particle sizes are solved; and by arranging the curing unit, rapid curing of the coating layer is achieved, and the coating quality is improved while the efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of preparation of coated particles, and particularly to an apparatus for preparing brominated epoxy resin-coated particles. Background Art

[0002] Brominated epoxy resin has become an ideal choice in the field of particle coating due to its thermal stability, low dialysis property, environmental friendliness and processing adaptability, and is particularly suitable for scenarios with strict requirements for flame retardancy, weather resistance and surface properties, such as electronic appliances, automotive parts, outdoor equipment, etc.

[0003] During the production process of coating particles with brominated epoxy resin, due to the relatively difficult process control, the coating quality of brominated epoxy resin particles may be affected, such as problems like uneven coating and inconsistent particle sizes. Uneven coating may cause some parts of the brominated epoxy resin particles to be exposed, and the uncoated parts may be more vulnerable to environmental factors, resulting in a decline in the performance of the particles; inconsistent particle sizes may lead to phenomena such as separation, stratification or precipitation during processing or use, and may also require additional screening, grading or adjustment of process steps during production to increase the uniformity and consistency of the product, which will increase production costs and time and reduce production efficiency. Summary of the Invention

[0004] To solve the aforementioned technical problems, the present invention provides an apparatus for preparing brominated epoxy resin-coated particles. By setting a coating unit and a separation unit, brominated epoxy resin can be evenly and completely coated on the surface of the particles, solving the problems of uneven coating and inconsistent particle sizes; by setting a curing unit, rapid curing of the coating layer is achieved, improving the coating quality while enhancing efficiency, and further solving the problem of uneven coating caused by untimely curing. Specifically, it is achieved through the following technical solutions.

[0005] An apparatus for preparing brominated epoxy resin-coated particles according to the present invention includes a coating unit, a separation unit and a curing unit. The coating unit includes a mixing barrel, in which a brominated epoxy resin mixed solution is contained, and the bottom of the mixing barrel is fixedly communicated with a lifting part through a connecting channel; The lifting part includes an outer cylinder, and a rotating shaft and a spiral blade are arranged in the outer cylinder and rotate along it. The spiral blade is provided with leakage holes for lifting the particles and separating the excess resin mixed solution; The separation unit includes a separation box, in which a rotating cylinder is rotatably installed. The side wall of the rotating cylinder is provided with sieve holes, and a reflux port is arranged at the bottom of the separation box. The reflux port is communicated with the mixing barrel, and a collection bin is arranged outside the top of the separation box for collecting the coated particles after centrifugal separation; The curing unit includes a curing box, on which a vibration motor is installed. Inside the curing box, there is an irradiation chamber and a heating chamber. A partition is provided between the irradiation chamber and the heating chamber. A number of wavy guiding plates are fixed on the partition. The partition is provided with a first air hole, which connects the irradiation chamber and the heating chamber. Inside the irradiation chamber, there is a fan and a lamp tube. Inside the heating chamber, there is a heating wire. A second air hole is provided at the bottom of the heating chamber.

[0006] Preferably, the outer wall of the collection bin is fixedly communicated with a number of second discharge ports. The top end of the collection bin is coaxially fixed with a third feed port. The bottom of the third feed port is coaxially fixed with a funnel. An annular gap is formed between the side wall of the funnel and the side wall of the rotating cylinder.

[0007] Preferably, a fourth feed port is provided at the first end of the irradiation chamber, and a third discharge port is provided at the second end of the irradiation chamber.

[0008] Preferably, the curing box is inclined and inclined in the direction from top to bottom from the fourth feed port to the third discharge port.

[0009] Preferably, a photoinitiator and a thermal initiator are added to the brominated epoxy resin mixture.

[0010] Preferably, a second motor is fixed on the outer cylinder. The output end of the second motor hermetically passes through the top of the outer cylinder and is coaxially fixed with a rotating shaft. The rotating shaft is coaxially fixed with a spiral blade. The side of the outer cylinder is fixedly communicated with a first discharge port.

[0011] Preferably, the top of the mixing barrel is fixed with a first motor. The output end of the first motor is coaxially fixed with a driving shaft. A number of stirring paddles are fixed on the driving shaft; The top of the mixing barrel is respectively fixedly communicated with a first feed port and a second feed port. A number of mounting brackets are fixed on the outer surface of the mixing barrel.

[0012] Preferably, a number of lamp shades are fixedly installed on the inner top of the irradiation chamber. A lamp tube is installed on the lamp shade. The lamp tube is electrically connected to an electrode post, and the electrode post is fixedly installed on the curing box.

[0013] Preferably, the bottom of the rotating cylinder is coaxially fixed with the output end of a third motor, and the third motor is fixed on the outer side of the bottom of the separation box.

[0014] After adopting the above technical solutions, the beneficial effects of the present invention are as follows: 1. By setting a lifting part, the present invention mixes and coats the coated particles and the brominated epoxy resin mixture and then performs preliminary separation, which can realize the continuous production operation of particle coating, improve production efficiency, and at the same time improve the utilization rate of brominated epoxy resin.

[0015] 2. The present invention controls the thickness uniformity of the coating layer on the surface of the particles through centrifugal separation. Under the action of centrifugal force, the excess mixed liquid on the surface of the particles is separated and recovered, ensuring the uniformity of particle coating while improving the recycling rate of raw materials.

[0016] 3. The present invention uses photo-thermal dual initiation to achieve rapid curing of the coating layer, accelerating the production efficiency. During the curing process, combined with the irregular rolling of the particles, uniform curing of the coating layer on the particle surface is achieved, thereby improving the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Schematic installation diagram of the device for preparing brominated epoxy resin-coated particles; Figure 2 Schematic structural diagram of the coating unit; Figure 3 Partial sectional view of the lifting part; Figure 4 Front sectional view of the separation unit; Figure 5 Schematic structural diagram of the curing unit; Figure 6 Front sectional view of the curing unit; Figure 7 Horizontal sectional view of the irradiation chamber; Figure 8 Horizontal sectional view of the heating chamber.

[0019] Explanation of reference numerals in the drawings: 100 - coating unit, 101 - mixing barrel, 102 - first motor, 103 - drive shaft, 104 - stirring paddle, 105 - first feed port, 106 - second feed port, 107 - mounting bracket, 108 - connection channel, 110 - lifting part, 111 - outer cylinder, 112 - second motor, 113 - rotating shaft, 114 - spiral blade, 115 - leakage hole, 116 - first discharge port; 200 - separation unit, 201 - separation box, 202 - support leg, 203 - third feed port, 204 - funnel, 205 - rotating drum, 206 - sieve hole, 207 - third motor, 208 - collection bin, 209 - second discharge port, 210 - reflux port; 300 - Curing unit, 301 - Curing box, 302 - Vibration motor, 303 - Irradiation chamber, 304 - Heating chamber, 305 - Partition board, 306 - Fourth feed port, 307 - Third discharge port, 308 - Fan, 309 - Lamp shade, 310 - Lamp tube, 311 - Electrode post, 312 - Guide plate, 313 - First air hole, 314 - Electric heating wire, 315 - Second air hole. Detailed implementation manners

[0020] The features of various aspects of the present invention and exemplary embodiments will be described in detail below. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only provided to provide a better understanding of the present invention by showing examples of the present invention.

[0021] The orientation words appearing in the following description are all the directions shown in the figures and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "installation, connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] An embodiment of the present invention provides a device for preparing brominated epoxy resin-coated particles. Refer to Figure 1 、 Figure 2 , this device includes a coating unit 100, a separation unit 200, and a curing unit 300. The coating unit 100 includes a mixing barrel 101. The mixing barrel 101 contains particles to be coated and a brominated epoxy resin mixture. One side of the bottom of the mixing barrel 101 is fixedly connected and communicated with the first end of a connection channel 108. The second end of the connection channel 108 is fixedly communicated with a lifting part 110. The lifting part 110 is inclined and is used to complete the height lifting of the particles in the mixing barrel 101 that have adhered to the brominated epoxy resin mixture.

[0023] Refer to Figure 3, the lifting part 110 includes an outer cylinder 111. The first end of the outer cylinder 111 is fixedly connected and communicated with the second end of the connecting channel 108. The second end of the outer cylinder 111 is fixed to the second motor 112. The output end of the second motor 112 is hermetically passed through the top of the outer cylinder 111 and coaxially fixed to the rotating shaft 113. A spiral blade 114 is coaxially fixed on the outer surface of the rotating shaft 113. A number of leakage holes 115 are evenly formed on the spiral blade 114. The side surface of the second end of the outer cylinder 111 is fixedly communicated with the first discharge port 116.

[0024] The particles to be coated and the brominated epoxy resin mixture are fully mixed and contacted in the mixing barrel 101, so that the surface of the particles to be coated is completely adhered with the brominated epoxy resin mixture. The lifting part 110 lifts the coated particles to a high height through the connecting channel 108 at the bottom of the mixing barrel 101. During this process, the output end of the second motor 112 drives the rotating shaft 113 and the spiral blade 114 to rotate synchronously. Then, under the action of the spiral blade 114, the coated particles are lifted. During the lifting process of the coated particles, the excess brominated epoxy resin mixture adhered to the surface thereof is separated from the coated particles through the leakage holes 115 formed on the spiral blade 114.

[0025] The above process avoids excessive local adhesion of the brominated epoxy resin mixture on the surface of the coated particles, thereby causing uneven thickness of the coating layer. And through the lifting effect of the lifting part 110, the coated particles are lifted to the first discharge port 116, while the brominated epoxy resin mixture remains in the mixing barrel 101, the connecting channel 108 and the bottom of the lifting part 110 to continue to complete the surface coating of the subsequent particles.

[0026] Among them, the brominated epoxy resin mixture is a mixture of brominated epoxy resin and additives. The additives are brominated epoxy oligomers and reactive diluents, and their function is to enhance the fluidity of the epoxy resin mixture, so as to effectively achieve complete coating of the particles.

[0027] As a further explanation of the above embodiment, see Figure 2 , the coating unit 100 further includes a first motor 102 fixed on the top of the mixing barrel 101. The output end of the first motor 102 passes through the top of the mixing barrel 101 and is coaxially fixed to the driving shaft 103. A number of stirring paddles 104 are fixed on the outer surface of the driving shaft 103.

[0028] One side of the top of the mixing barrel 101 is fixedly communicated with the first feed port 105, and the first feed port 105 is used to feed the particles to be coated into the mixing barrel 101. The other side of the top of the mixing barrel 101 is fixedly communicated with the second feed port 106, and the second feed port 106 is used to supplement the brominated epoxy resin mixture into the mixing barrel 101.

[0029] Among them, a number of mounting brackets 107 are uniformly fixed on the outer surface of the mixing barrel 101 along its circumferential direction, and the mounting brackets 107 are used for the installation and fixation of the mixing barrel 101.

[0030] In this embodiment, the particles to be coated are added into the mixing barrel 101 through the first feed port 105. The particles to be coated are stirred by the stirring paddle 104 in the mixing barrel 101 to achieve sufficient mixing and contact with the brominated epoxy resin mixture, so that the brominated epoxy resin completely and comprehensively coats the surface of the particles.

[0031] See Figure 1 , Figure 4 , after the coated particles are discharged from the first discharge port 116, they are conveyed into the separation unit 200 for further separation of the brominated epoxy resin adhered to the surface. The separation unit 200 includes a separation box 201. A number of legs 202 are fixed on the bottom of the separation box 201 along its circumferential direction. A number of reflux ports 210 are fixedly installed on the side surface of the bottom of the separation box 201. The reflux ports 210 are communicated with the inside of the separation box 201. The reflux ports 210 are communicated with the second feed port 106 through a pipeline equipped with a pump body.

[0032] The upper edge of a rotating cylinder 205 is rotatably installed on the top of the separation box 201. The rotating cylinder 205 is of a basin-shaped structure. A number of sieve holes 206 are uniformly formed on the side wall of the rotating cylinder 205. The bottom of the rotating cylinder 205 is coaxially fixed with the output end of a third motor 207, and the third motor 207 is fixed on the outside of the bottom of the separation box 201.

[0033] An annular collection bin 208 is fixedly installed on the outside of the top of the separation box 201. The bottom horizontal height of the collection bin 208 is lower than the top end of the separation box 201. The outer wall of the collection bin 208 is fixedly communicated with a number of second discharge ports 209. The top end of the collection bin 208 is coaxially fixed with the outer surface of a third feed port 203. The bottom of the third feed port 203 is coaxially fixed with the top of a funnel 204. An annular gap is formed between the side wall of the funnel 204 and the side wall of the rotating cylinder 205.

[0034] The coated particles fall into the rotating cylinder 205 through the third feed port 203 and the funnel 204. The rotating cylinder 205 is driven by the third motor 207 to rotate at a high speed relative to the separation box 201. During the rotation process, the excess brominated epoxy resin mixture adhered to the surface of the coated particles is thrown outwards through the sieve holes 206 formed on the side wall of the rotating cylinder 205 under the action of centrifugal force, enters the inside of the separation box 201, and is discharged through the reflux ports 210 at the bottom of the separation box 201, and is conveyed to the second feed port 106 through a pipeline equipped with a pump body and re-enters the mixing barrel 101 for recycling.

[0035] On the other hand, during the high-speed rotation of the rotary drum 205, the coated particles inside the rotary drum 205 roll outward along the side wall of the rotary drum 205 under the action of centrifugal force. After rolling to the outermost side of the rotary drum 205, they enter the collection bin 208 and are discharged outward through the second discharge port 209. The excess brominated epoxy resin mixture on the surface of the coated particles after centrifugal treatment is thrown away from the particle surface, ensuring the uniform thickness of the coating layer of the coated particles.

[0036] As a further explanation of the above embodiment, refer to Figure 1 、 Figures 5 to 8 , the curing unit 300 includes a curing box 301. A number of vibration motors 302 are fixedly installed on the outer surface of the curing box 301 to drive the vibration of the curing box 301 during operation. An irradiation chamber 303 is arranged above the interior of the curing box 301, and a heating chamber 304 is arranged below the interior of the curing box 301. A partition plate 305 fixed to the interior of the curing box 301 is arranged between the irradiation chamber 303 and the heating chamber 304; A fourth feed port 306 is arranged at the first end of the irradiation chamber 303. The fourth feed port 306 is fixed to the curing box 301, and the bottom of the fourth feed port 306 is flush with the heating chamber 304. A third discharge port 307 is arranged at the second end of the irradiation chamber 303. The third discharge port 307 is opened on the curing box 301, and the lower surface of the third discharge port 307 is flush with the upper surface of the heating chamber 304.

[0037] A number of fans 308 are fixedly installed on the side of the irradiation chamber 303 to realize the gas exchange between the irradiation chamber 303 and the outside. A number of lamp holders 309 are fixedly installed on the inner top of the irradiation chamber 303. Lamp tubes 310 are installed on the lamp holders 309. The lamp tubes 310 are electrically connected to electrode columns 311, and the electrode columns 311 are fixedly installed on the curing box 301.

[0038] A number of guide plates 312 are uniformly fixed on the upper surface of the partition plate 305. The guide plates 312 have a wavy profile. A number of first air holes 313 are uniformly opened on the partition plate 305. The first air holes 313 communicate the irradiation chamber 303 and the heating chamber 304. Electric heating wires 314 are fixedly installed in the heating chamber 304. The electric heating wires 314 are used to heat the gas in the heating chamber 304. A number of second air holes 315 are opened at the bottom of the heating chamber 304. The second air holes 315 communicate the heating chamber 304 with the outside.

[0039] Among them, the curing box 301 is inclined, and it is inclined in the direction from top to bottom from the fourth feed port 306 to the third discharge port 307. This structure facilitates the entry of the coated particles from the fourth feed port 306 and then rolling along the upper surface of the partition plate 305 towards the third discharge port 307 under the action of gravity.

[0040] Among them, a photoinitiator and a thermal initiator are added to the brominated epoxy resin mixture, so that the coated particles are rapidly cured under the action of light and hot air in the irradiation chamber 303.

[0041] In the above embodiment of the present invention, the coated particles after being centrifugally treated by the separation unit 200 are transported to the fourth feed port 306. During the working process, the vibration motor 302 is in a starting state. Under the vibration action of the vibration motor 302 and its own gravity, the coated particles at the fourth feed port 306 roll onto the upper surface of the partition plate 305, and through vibration transmission, the coated particles are prevented from sticking to each other, so that they can roll down from high to low along the inclined partition plate 305. The coated particles are irradiated by the lamp tube 310 arranged at the top of the irradiation chamber 303 to accelerate the curing of the coating layer.

[0042] During this process, the interaction between the coated particles and the guide plate 312 causes the rolling direction of the coated particles to change at all times, that is, the position of the coated particles facing the lamp tube 310 changes arbitrarily, thereby realizing uniform curing of all positions of the coating layer on the outer surface of the particles.

[0043] At the same time, several fans 308 fixedly installed on the side of the irradiation chamber 303 work synchronously to pump out the gas inside the irradiation chamber 303, so that a negative pressure is formed inside the irradiation chamber 303. Under the action of this negative pressure, a part of the external gas enters the heating chamber 304 through the second air hole 315 opened at the bottom of the heating chamber 304, exchanges heat with the outer surface of the heating wire 314, and then enters the irradiation chamber 303 through the first air hole 313 to raise the temperature inside the irradiation chamber 303 and further accelerate the curing of the particle coating layer.

[0044] In accordance with the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, according to the above description, many modifications and changes can be made. The purpose of selecting and specifically describing these embodiments in this specification is to better explain the principle and practical application of the present invention, so that those skilled in the art can make good use of the present invention and its modified use based on the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for preparing brominated epoxy resin-coated particles, characterized in that: It includes a coating unit (100), a separation unit (200) and a curing unit (300). The coating unit (100) includes a mixing barrel (101) which contains a brominated epoxy resin mixture. The bottom of the mixing barrel (101) is fixedly communicated with a lifting part (110) through a connecting channel (108); The lifting part (110) includes an outer cylinder (111). A rotating shaft (113) and a spiral blade (114) are arranged in the outer cylinder (111) and rotate along it. Leak holes (115) are provided on the spiral blade (114) for transporting particles and separating excess resin mixture; The separation unit (200) includes a separation box (201). A rotating cylinder (205) is rotatably installed in the separation box (201). Sieve holes (206) are provided on the side wall of the rotating cylinder (205). A reflux port (210) is provided at the bottom of the separation box (201). The reflux port (210) is communicated with the mixing barrel (101). A collection bin (208) is provided outside the top of the separation box (201) for collecting coated particles after centrifugal separation; The curing unit (300) includes a curing box (301). A vibration motor (302) is installed on the curing box (301). An irradiation chamber (303) and a heating chamber (304) are provided in the curing box (301). A partition plate (305) is provided between the irradiation chamber (303) and the heating chamber (304). A number of wavy guide plates (312) are fixed on the partition plate (305). A first air hole (313) is provided on the partition plate (305) to communicate the irradiation chamber (303) and the heating chamber (304). A fan (308) and a lamp tube (310) are provided in the irradiation chamber (303). A heating wire (314) is provided in the heating chamber (304). A second air hole (315) is provided at the bottom of the heating chamber (304).

2. The device for preparing brominated epoxy resin coated particles according to claim 1, wherein: The outer wall of the collection bin (208) is fixedly communicated with a number of second discharge ports (209). The top end of the collection bin (208) is coaxially fixed with a third feed port (203). The bottom of the third feed port (203) is coaxially fixed with a funnel (204). An annular gap is formed between the side wall of the funnel (204) and the side wall of the rotating cylinder (205).

3. The device for preparing brominated epoxy resin coated particles according to claim 1, wherein: A fourth feed port (306) is provided at the first end of the irradiation chamber (303), and a third discharge port (307) is provided at the second end of the irradiation chamber (303).

4. The device for preparing brominated epoxy resin coated particles according to claim 3, wherein: The curing box (301) is inclined and inclined in the direction from top to bottom from the fourth feed port (306) to the third discharge port (307).

5. The device for preparing brominated epoxy resin coated particles according to claim 1, wherein: A photoinitiator and a thermal initiator are added to the brominated epoxy resin mixture.

6. The device for preparing brominated epoxy resin-coated particles according to claim 1, wherein: A second motor (112) is fixed on the outer cylinder (111). The output end of the second motor (112) hermetically passes through the top of the outer cylinder (111) and is coaxially fixed to the rotating shaft (113). The rotating shaft (113) is coaxially fixed to the spiral blade (114). The side surface of the outer cylinder (111) is fixedly communicated with the first discharge port (116).

7. The device for preparing brominated epoxy resin-coated particles according to claim 1, wherein: The top of the mixing barrel (101) is fixed to the first motor (102). The output end of the first motor (102) is coaxially fixed to the driving shaft (103). A number of stirring paddles (104) are fixed on the driving shaft (103); The top of the mixing barrel (101) is respectively fixedly communicated with the first feed port (105) and the second feed port (106). A number of mounting brackets (107) are fixed on the outer surface of the mixing barrel (101).

8. The device for preparing brominated epoxy resin-coated particles according to claim 1, wherein: A number of lamp covers (309) are fixedly installed on the inner top of the irradiation chamber (303). A lamp tube (310) is installed on the lamp cover (309). The lamp tube (310) is electrically connected to the electrode post (311). The electrode post (311) is fixedly installed on the curing box (301).

9. The device for preparing brominated epoxy resin-coated particles according to claim 1, wherein: The bottom of the rotating cylinder (205) is coaxially fixed to the output end of the third motor (207). The third motor (207) is fixed on the outer bottom of the separation box (201).

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