Polymerization reactor for plastic powder production
Patent Information
- Application Number
- CN202522389349.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-10-13
- Estimated Expiration
- 2035-11-11
AI Technical Summary
[0003]现有的聚合反应釜缺少打散和筛分功能，加入到釜中的原料会有一定的结团现象，而且原料的粒径也大小不一，当加入到釜中的硫化剂、稳定剂和改性剂与原料发生反应时，由于结团现象的存在，导致硫化剂、稳定剂和改性剂无法充分与原料发生反应，导致聚合效果较差，聚合物产率较低；又由于原料的初始粒径大小不一，导致反应后的产物的粒径也存在差异，后续还要另行安排时间和人工进行筛料，费时费力；此外，现有的聚合反应釜的搅拌效果也欠佳，因为大都只能带动原料周向移动，导致聚合反应的速度较慢，有待于进一步改进
[0011]与现有技术相比，本实用新型的优点在于：本实用新型能借助锥形散料盘和椭圆形筛板分别具备打散原料和筛分原料的功能，进而能将加入到釜中的原料先进行打散，再下落到椭圆形筛板上，从而借助椭圆形筛板将粒径不符合要求的原料筛除，当硫化剂、稳定剂和改性剂经由进液管进入到筒体内部时，就会穿过椭圆形筛板并进入到反应室中，进而与位于反应室内的原料发生反应，由于反应室内的原料既没有结团现象，而且粒径大小也符合要求，所以硫化剂、稳定剂和改性剂均能与原料充分发生反应，进而有效提升聚合效果并提高聚合物产率；还省去了另行安排时间和人工进行筛料的环节以达到省时省力的效果；此外，本实用新型的每个搅拌杆均与牵引轴呈倾斜角度分布，进而能在转动时搅动位于反应室内的原料上下翻滚，从而提升了搅拌效果以加快反应的速度。
Smart Images
Figure CN224846052U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a polymerization reactor for the production of plastic powder. Background Technology
[0002] Plastic powder is a dry, fine solid powder coating that is applied to the surface of a workpiece through processes such as electrostatic spraying. After baking, melting, leveling, and curing, it forms a tough coating. The production process of plastic powder mainly includes steps such as raw material preparation, polymerization reaction, mixing and plasticizing, molding, and processing. The polymerization reaction of plastic powder refers to the process of converting low molecular weight monomers into high molecular weight polymers through chemical reactions. This process is usually carried out in a reaction vessel.
[0003] Existing polymerization reactors lack agitation and sieving functions, resulting in some agglomeration of raw materials added to the reactor. Furthermore, the particle size of the raw materials varies, hindering the reaction of vulcanizing agents, stabilizers, and modifiers with the raw materials. This agglomeration prevents these agents from fully reacting, leading to poor polymerization and low polymer yield. Moreover, the inconsistent initial particle size of the raw materials results in variations in the particle size of the reacted products, necessitating additional time and manual sieving, which is time-consuming and labor-intensive. In addition, the stirring effect of existing polymerization reactors is inadequate, as they mostly only move the raw materials circumferentially, resulting in a slow polymerization reaction rate. Further improvements are needed. Utility Model Content
[0004] In view of the current state of the prior art, the technical problem to be solved by this utility model is to provide a polymerization reactor for the production of plastic powder that has the functions of dispersing and screening raw materials to effectively improve the polymerization effect and increase the polymer yield, while achieving the effects of saving time and labor, and also improving the stirring effect to accelerate the reaction speed.
[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a polymerization reactor for the production of plastic powder, comprising a cylinder, a detachable cylinder cover fixed at the top opening of the cylinder, and a stirring mechanism disposed between the cylinder and the cylinder cover, characterized in that: The stirring mechanism includes a stirring motor fixed to the center of the outer wall of the top of the cylinder cover, a vertically rotatable traction shaft inserted through the center of the cylinder cover, and an elliptical sieve plate inclined inside the cylinder body. The rotating shaft of the stirring motor is vertically downward and concentrically fixed to the upper end of the traction shaft, and the lower end of the traction shaft is fixed to the center of the elliptical sieve plate. The edge of the elliptical sieve plate slides against the inner wall of the cylinder, and the elliptical sieve plate divides the interior of the cylinder into a screening chamber and a reaction chamber. A rectangular discharge hole is provided on the outer wall of one side of the bottom of the cylinder, and the lowest edge of the elliptical screen plate is not lower than the lower inner wall of the rectangular discharge hole. The stirring mechanism also includes multiple stirring rods that are inserted and fixed in the elliptical sieve plate and do not contact the traction shaft; the upper end of each stirring rod extends into the interior of the screening chamber and does not contact the inner wall of the cylinder; the lower end of each stirring rod extends into the interior of the reaction chamber and does not contact the inner wall of the cylinder.
[0006] Preferably, the stirring mechanism further includes a conical material tray concentrically mounted on the traction shaft and located above the elliptical screen plate, and a plurality of spokes fixed on the outer conical surface of the conical material tray and evenly arranged at equal angles along the circumference. The outer diameter of the conical material tray is smaller than the inner diameter of the cylinder.
[0007] Preferably, the interior of the cylinder is further provided with a liquid inlet pipe that is horizontally located between the conical material distribution plate and the elliptical screen plate and does not contact the traction shaft or any of the stirring rods. Both ends of the liquid inlet pipe are sealed and pass through the cylinder and extend to the outside of the cylinder. Multiple liquid outlet holes are provided on the lower side of the liquid inlet pipe.
[0008] Preferably, the middle part of the liquid inlet pipe has a C-shaped bend that surrounds the stirring rod, and several arc-shaped turning sections are formed between the two ends of the C-shaped bend and the two ends of the liquid inlet pipe.
[0009] Preferably, a feed hopper that communicates with the inside of the cylinder is inserted into one side of the top of the cylinder cover, and an inverted conical hopper is formed at the bottom of the cylinder. A discharge pipe that communicates with the inside of the conical hopper is also inserted into the bottom of the conical hopper.
[0010] Preferably, a detachable arc-shaped cover is also fixed at the rectangular discharge hole.
[0011] Compared with the prior art, the advantages of this utility model are as follows: This utility model can utilize the conical material distribution plate and the elliptical sieve plate to respectively disperse and screen the raw materials. The raw materials added to the reactor are first dispersed and then fall onto the elliptical sieve plate, thus removing raw materials with unsuitable particle sizes. When the vulcanizing agent, stabilizer, and modifier enter the cylinder through the inlet pipe, they pass through the elliptical sieve plate and enter the reaction chamber, where they react with the raw materials. Since the raw materials in the reaction chamber do not clump and their particle size meets the requirements, the vulcanizing agent, stabilizer, and modifier can fully react with the raw materials, effectively improving the polymerization effect and increasing the polymer yield. It also eliminates the need for separate time and manual screening, achieving time and labor savings. Furthermore, each stirring rod of this utility model is inclined at an angle to the traction shaft, which agitates the raw materials in the reaction chamber during rotation, thereby improving the stirring effect and accelerating the reaction speed. Attached Figure Description
[0012] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description; throughout the drawings, the same or similar reference numerals denote the same or similar elements; it should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale; in the drawings: Figure 1 This is an exploded top view of the present invention; Figure 2 This is a side sectional view of the present invention. Detailed Implementation
[0013] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0014] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.
[0015] like Figures 1-2 As shown, a polymerization reactor for producing plastic powder includes a cylindrical body 1, a detachable cover 2 fixed to the top opening of the cylindrical body 1, and a stirring mechanism 4 disposed between the cylindrical body 1 and the cover 2. The stirring mechanism 4 includes a stirring motor 42 fixed to the center of the outer wall of the top of the cylinder cover 2, a traction shaft 41 that is vertically and rotatably connected to the center of the cylinder cover 2, and an elliptical sieve plate 43 that is inclined inside the cylinder body 1. The rotating shaft of the stirring motor 42 is vertically downward and concentrically fixed to the upper end of the traction shaft 41, and the lower end of the traction shaft 41 is fixed to the center of the elliptical sieve plate 43. The edge of the elliptical sieve plate 43 slides against the inner wall of the cylinder 1, and the elliptical sieve plate 43 divides the interior of the cylinder 1 into a screening chamber 102 and a reaction chamber 103. A rectangular discharge hole 101 is provided on the outer wall of one side of the bottom of the cylinder 1, and the lowest side edge of the elliptical screen plate 43 is not lower than the lower inner wall of the rectangular discharge hole 101. The stirring mechanism 4 also includes multiple stirring rods 44 that are inserted and fixed in the elliptical sieve plate 43 and do not contact the traction shaft 41; the upper end of each stirring rod 44 extends into the interior of the screening chamber 102 and does not contact the inner wall of the cylinder 1; the lower end of each stirring rod 44 extends into the interior of the reaction chamber 103 and does not contact the inner wall of the cylinder 1.
[0016] The mixing mechanism 4 also includes a conical material tray 45 concentrically mounted on the traction shaft 41 and located above the elliptical screen plate 43, and a plurality of spokes 46 fixed on the outer conical surface of the conical material tray 45 and evenly arranged at equal angles along the circumference. The outer diameter of the conical material tray 45 is smaller than the inner diameter of the cylinder 1.
[0017] The inside of the cylinder 1 is also provided with a liquid inlet pipe 6, which is located horizontally between the conical material distribution plate 45 and the elliptical screen plate 43 and does not contact the traction shaft 41 or any of the stirring rods 44. Both ends of the liquid inlet pipe 6 are sealed and pass through the cylinder 1 and extend to the outside of the cylinder 1. Multiple liquid outlet holes 61 are opened on the lower side of the liquid inlet pipe 6.
[0018] The middle part of the liquid inlet pipe 6 has a C-shaped bend section 62 that surrounds the stirring rod 44. Several arc-shaped turning sections 63 are formed between the two ends of the C-shaped bend section 62 and the two ends of the liquid inlet pipe 6.
[0019] The top side of the cylinder cover 2 is also connected to the feed hopper 3, which is interconnected with the inside of the cylinder 1. The bottom of the cylinder 1 forms an inverted cone hopper 104, and the bottom of the cone hopper 104 is also connected to the discharge pipe 5, which is interconnected with the inside of the cone hopper 104.
[0020] A detachable arc-shaped cover 7 is also fixed at the rectangular discharge hole 101.
[0021] Working principle: Temporarily close the discharge pipe 5, start the stirring motor 42 in the stirring mechanism 4 to make its rotating shaft rotate, and then drive the elliptical screen plate 43 and the conical material distribution plate 45 to rotate by means of the traction shaft 41. Then, the raw materials required for the reaction are added into the cylinder 1 through the feed hopper 3 and fall to the top of the conical material distribution plate 45. Since the conical material distribution plate 45 and each spoke 46 are rotating, the spokes 46 will disperse the falling raw materials in the surrounding area during the rotation process. This can make the raw materials fall evenly and break up the clumps of raw materials.
[0022] After leaving the conical material tray 45, the raw material falls to the top of the elliptical screen plate 43. The raw material with the required particle size passes through the sieve holes in the elliptical screen plate 43 and falls into the interior of the reaction chamber 103. Since each stirring rod 44 rotates with the elliptical screen plate 43, its upper end can be used to stir the raw material located inside the screening chamber 102, thereby accelerating the screening speed.
[0023] After screening, raw materials with particle sizes that do not meet the requirements remain on the top of the elliptical screen plate 43. Then, the stirring motor 42 is turned off and the lowest side edge of the elliptical screen plate 43 is rotated to the lower inner wall of the rectangular discharge hole 101. Then, the arc-shaped hole cover 7 is removed and the raw materials remaining on the top of the elliptical screen plate 43 are discharged. Since the elliptical screen plate 43 is set at an angle, most of the raw materials will slide down automatically. After discharge, the arc-shaped hole cover 7 is put back.
[0024] Next, the vulcanizing agent, stabilizer, and modifier are connected to both ends of the inlet pipe 6 so that they enter the interior of the inlet pipe 6 and then drip evenly downwards through multiple outlet holes 61. The dripping vulcanizing agent, stabilizer, and modifier pass through the elliptical sieve plate 43 and enter the reaction chamber 103, where they polymerize with the raw materials in the reaction chamber 103. At this point, the stirring motor 42 needs to be restarted to keep the elliptical sieve plate 43 rotating, and the raw materials in the reaction chamber 103 are stirred by the lower end of each stirring rod 44, thereby accelerating the reaction speed.
[0025] After the reaction is complete, open the discharge pipe 5, and the polymerization product will be discharged outward through the discharge pipe 5 for collection.
[0026] This invention utilizes a conical material distribution plate 45 and an elliptical sieve plate 43 to respectively disperse and screen raw materials. The raw materials added to the reactor are first dispersed and then fall onto the elliptical sieve plate 43, whereby materials with unsuitable particle sizes are screened out. When the vulcanizing agent, stabilizer, and modifier enter the cylinder 1 through the inlet pipe 6, they pass through the elliptical sieve plate 43 and enter the reaction chamber 103, where they react with the raw materials. Because the reaction chamber 103... The raw materials in chamber 3 do not clump together and the particle size meets the requirements, so the vulcanizing agent, stabilizer and modifier can react fully with the raw materials, thereby effectively improving the polymerization effect and increasing the polymer yield; it also saves the time and effort of sieving materials; in addition, each stirring rod 44 of this invention is inclined at an angle to the traction shaft 41, so that the raw materials in the reaction chamber 103 can be stirred up and rolled up and down when rotating, thereby improving the stirring effect and accelerating the reaction speed.
[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A polymerization reactor for producing plastic powder, comprising a cylindrical body, a detachable cover fixed to the top opening of the cylindrical body, and a stirring mechanism disposed between the cylindrical body and the cover, characterized in that: The stirring mechanism includes a stirring motor fixed to the center of the outer wall of the top of the cylinder cover, a vertically rotatable traction shaft inserted through the center of the cylinder cover, and an elliptical sieve plate inclined inside the cylinder body. The rotating shaft of the stirring motor is vertically downward and concentrically fixed to the upper end of the traction shaft, and the lower end of the traction shaft is fixed to the center of the elliptical sieve plate. The edge of the elliptical sieve plate slides against the inner wall of the cylinder, and the elliptical sieve plate divides the interior of the cylinder into a screening chamber and a reaction chamber. A rectangular discharge hole is provided on the outer wall of one side of the bottom of the cylinder, and the lowest edge of the elliptical screen plate is not lower than the lower inner wall of the rectangular discharge hole. The stirring mechanism also includes multiple stirring rods that are inserted and fixed in the elliptical sieve plate and do not contact the traction shaft; the upper end of each stirring rod extends into the interior of the screening chamber and does not contact the inner wall of the cylinder; the lower end of each stirring rod extends into the interior of the reaction chamber and does not contact the inner wall of the cylinder.
2. The polymerization reactor for producing plastic powder according to claim 1, characterized in that, The stirring mechanism also includes a conical material tray concentrically mounted on the traction shaft and located above the elliptical screen plate, and multiple spokes fixed on the outer conical surface of the conical material tray and evenly arranged at equal angles along the circumference. The outer diameter of the conical material tray is smaller than the inner diameter of the cylinder.
3. A polymerization reactor for producing plastic powder according to claim 2, characterized in that, The cylinder is also provided with a liquid inlet pipe located horizontally between the conical material distribution plate and the elliptical screen plate, and not in contact with the traction shaft or any of the stirring rods. Both ends of the liquid inlet pipe are sealed and pass through the cylinder and extend to the outside of the cylinder. Multiple liquid outlet holes are opened on the lower side of the liquid inlet pipe.
4. A polymerization reactor for producing plastic powder according to claim 3, characterized in that, The middle part of the liquid inlet pipe has a C-shaped bend that surrounds the stirring rod. Several arc-shaped turning sections are formed between the two ends of the C-shaped bend and the two ends of the liquid inlet pipe.
5. A polymerization reactor for producing plastic powder according to claim 1, characterized in that, The top side of the cylinder cover is also connected to a feed hopper that communicates with the inside of the cylinder. The bottom of the cylinder forms an inverted conical hopper, and the bottom of the conical hopper is also connected to a discharge pipe that communicates with the inside of the conical hopper.
6. A polymerization reactor for producing plastic powder according to claim 1, characterized in that, A detachable arc-shaped cover is also fixed to the rectangular discharge hole.