Production process and equipment of polyether-ether-ketone with high wear resistance and low friction coefficient

Abstract

The invention discloses a process and equipment for producing polyether-ether-ketone with high wear resistance and low friction coefficient, and belongs to the technical field of polyether-ether-ketone production. The invention relates to a production process of polyether-ether-ketone with high wear resistance and low friction coefficient. The production process comprises the following steps: step 1, screening and preparing raw materials; step 2, crushing the screened raw materials; 3, plasma treatment work is carried out, and material supplementing work is carried out; step 4, carrying out polymerization work on the raw materials; 5, after cooling, carrying out polycondensation treatment; and 6, separating the polymer from the solvent to obtain polyether-ether-ketone powder. The preparation method solves the problem that the product quality is affected due to the fact that the wear-resistant effect needs to be improved through later-stage processing in existing polyether-ether-ketone production, plasma treatment is carried out on the polyether-ether-ketone raw materials, improvement of the bonding performance and improvement of the bonding strength are facilitated, and by supplementing molybdenum disulfide liquid, the bonding strength is improved. Solid obtained after molybdenum disulfide and raw materials are polymerized can remarkably reduce the friction coefficient and improve the wear resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of polyetheretherketone production, and specifically provides a production process and equipment for polyetheretherketone with high wear resistance and low friction coefficient. Background Art

[0002] Polyetheretherketone is a high-performance thermoplastic polymer with excellent mechanical properties, heat resistance and chemical stability. Due to its high melting point and processing difficulty, the processing method of PEEK needs special attention. It is synthesized from terephthalic acid and benzophenone difluoride as raw materials and diphenyl sulfone as a solvent.

[0003] Chinese Patent No. CN 116854904 B discloses a production process and production system of polyetheretherketone. An explosion-proof electronic scale is used to measure the solid raw materials involved in the reaction. The measured raw and auxiliary materials including benzophenone difluoride, hydroquinone, carbonate, and diphenyl sulfone are put into a synthesis kettle, and then the synthesis kettle is sealed. While heating up, nitrogen replacement starts. After the system is heated up to 150 °C, it is maintained for 60 min. On the one hand, waiting for the nitrogen replacement to be completed, and on the other hand, making the raw and auxiliary materials fully melt and dissolve. After the nitrogen replacement is completed, the pressure in the kettle returns to normal pressure state, and then the heating polymerization reaction is carried out according to the set heating curve.

[0004] In the actual use process of the above-mentioned polyetheretherketone production device, the produced polyetheretherketone products need to be processed later to improve the wear resistance effect, and the later operation is difficult, which affects the work efficiency and product quality. Therefore, it does not meet the existing requirements. For this reason, we propose a production process and equipment for polyetheretherketone with high wear resistance and low friction coefficient. Summary of the Invention

[0005] The purpose of the present invention is to provide a production process and equipment for polyetheretherketone with high wear resistance and low friction coefficient, and solve the problem that in the actual use process of the polyetheretherketone production device mentioned in the above background art, the produced polyetheretherketone products need to be processed later to improve the wear resistance effect, and the later operation is difficult, which affects the work efficiency and product quality.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A production process for polyetheretherketone with high wear resistance and low friction coefficient includes the following steps:

[0007] Step 1: Screen and prepare the raw materials;

[0008] Step 2: Crush the screened raw materials;

[0009] Step 3: After processing, carry out the feeding work. During the feeding work, carry out plasma treatment work, and at the same time supplement molybdenum disulfide liquid into the feeding structure to synchronously carry out the feeding work;

[0010] Step 4: Polymerize the raw materials under acidic conditions;

[0011] Step 5: After polymerization is completed, quickly carry out the cooling work. After cooling, carry out the polycondensation treatment work;

[0012] Step 6: Cool the reaction polymer, separate the polymer and the solvent by precipitation, and after washing and drying, obtain polyether ether ketone powder;

[0013] The production process of the high wear-resistant and low friction coefficient polyether ether ketone is realized by using a production device for high wear-resistant and low friction coefficient polyether ether ketone.

[0014] Preferably, the raw materials in the said Step 1 include:

[0015] Terephthalic acid;

[0016] Difluorobenzophenone;

[0017] Concentrated sulfuric acid catalyst;

[0018] Diphenyl sulfone solvent;

[0019] Dry the said raw materials, and after drying, carry out metering and screening preparation according to the proportion.

[0020] Preferably, in the said Step 5, the polycondensation treatment work includes extraction work, and the extraction work includes the following steps:

[0021] S1: Extract the crude polymer after polymerization;

[0022] S2: Introduce the extraction liquid, and add steam to the outer coil for heating to assist stirring;

[0023] S3: Drain the extraction liquid;

[0024] S4: Repeat the extraction work. After complete and sufficient extraction, export the polymer.

[0025] A production device for high wear-resistant and low friction coefficient polyether ether ketone, including a conveying crusher, an ion injection pipe, a polymerization kettle, a cooling tank and a synthesis kettle. The lower end of the conveying crusher is provided with a feeding port, and the ion injection pipe is respectively connected to the feeding port of the polymerization kettle and the feeding port of the conveying crusher;

[0026] A constant temperature mold temperature machine is installed inside the conveying crusher, a heat-conducting feeding plate is installed at the upper end of the constant temperature mold temperature machine, and a vibrating disk is arranged at the lower end of the heat-conducting feeding plate;

[0027] The upper end of the ion injection pipe is provided with a solid-liquid introduction box, a spraying pump is arranged outside the solid-liquid introduction box, a storage tank is installed at one end of the solid-liquid introduction box, and a gas guide pipe is arranged on one side of the storage tank.

[0028] Preferably, a raw material feed port for introducing raw materials is provided on one side of the upper end of the conveyor pulverizer, and a heat-conducting unloading plate is connected below the raw material feed port. A powder roller is installed inside the conveyor pulverizer, and an inspection plate is provided above the powder roller. A guide frame is installed on one side of the conveyor pulverizer, and a conveyor belt is installed inside the guide frame. A servo motor is provided in the middle of the conveyor belt, and the servo motor is meshed and connected to the inner surface of the conveyor belt through gears.

[0029] Preferably, a reduction motor is installed on one side of the outside of the conveying crusher, the motor shaft of the reduction motor is connected to a guide shaft, and the guide shaft is fixedly connected to the motor shaft of the reduction motor and the powder roller through a coupling, and a telescopic valve plate is installed below the powder roller, and the outer surface of the telescopic valve plate is provided with an integrally formed polished surface, and a positioning sleeve is installed on one side of the telescopic valve plate, and a threaded screw is provided inside the positioning sleeve, and one end of the telescopic valve plate extends to the interior of the positioning sleeve and is threadedly connected to the threaded screw.

[0030] Preferably, a stepper motor is installed at the lower end of the ion injection tube, the stepper motor is fixedly connected to the ion injection tube, and a conveying pipe is arranged between the lower end of the ion injection tube and the discharge port, the conveying pipe is respectively connected to the ion injection tube and the discharge port, and a screw conveyor is installed inside the ion injection tube, and the screw conveyor is connected to the motor shaft of the stepper motor through a reducer.

[0031] Preferably, the solid-liquid introduction box is embedded in the interior of the ion injection tube and fixedly connected to the ion injection tube, and a plurality of spray pumps are provided, and the plurality of spray pumps are evenly arranged inside the solid-liquid introduction box, a feed inlet is provided outside the spray pump, and a discharge nozzle is installed at the lower end of the spray pump, and the discharge nozzle extends to the interior of the ion injection tube and is sealed and connected to the ion injection tube.

[0032] Preferably, a first drive motor is installed at the upper end of the polymerization kettle, and a drainage pipe is installed above the polymerization kettle, the drainage pipe is connected to the polymerization kettle, a drive shaft is installed at the lower end of the motor shaft of the first drive motor, a dispersion paddle is installed on the middle outer part of the drive shaft, and a stirring paddle is installed at the lower end of the drive shaft.

[0033] Preferably, the cooling tank is installed on one side of the polymerization kettle. Heat exchange tubes are installed outside the cooling tank. A solenoid valve is installed at the lower end of the polymerization kettle. Guide pipes are installed on both sides of the cooling tank. The guide pipes are hermetically connected to the synthesis kettle and the solenoid valve respectively. A longitudinal delivery pipe is installed at one end of the guide pipe. A pressure pump is installed at the upper end of the longitudinal delivery pipe. The synthesis kettle is installed on one side of the cooling tank, and a second drive motor is installed at the upper end of the synthesis kettle. A heater and a stirrer are arranged inside the synthesis kettle.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] 1. The production method of polyether ether ketone of the present invention adopts a continuous one-piece processing method, which can continuously process polyether ether ketone. Through screening and crushing treatment, the polymerization and polymerization effects are improved. In the feeding work, plasma treatment is carried out, and at the same time, molybdenum disulfide liquid is supplemented into the feeding structure to synchronously carry out the feeding work. The process of plasma treatment is adopted. By injecting inert gas into the feeding structure and then discharging electricity inside the feeding structure, the inert gas generates plasma, and the polyether ether ketone raw material is subjected to plasma treatment, so that the surface properties of the polyether ether ketone raw material are changed, which is beneficial to improving the bonding performance and increasing the bonding strength. By supplementing molybdenum disulfide liquid, the solid after the polymerization of molybdenum disulfide and the raw material can significantly reduce the friction coefficient and improve the wear resistance, so as to meet the actual application requirements.

[0036] 2. During the operation of the polyether ether ketone production equipment of the present invention, the crushed polyether ether ketone raw material is transported through a conveyor crusher, and the transportation is carried out through an ion injection pipe. The solid-liquid introduction box is equipped with evenly distributed spraying pumps, and the spraying pumps can inject molybdenum disulfide inside the solid-liquid introduction box into the ion injection pipe. During the transportation process of the screw conveyor, continuous spiral feeding is carried out. During the feeding process, molybdenum disulfide liquid is pumped in through the spraying pump and then evenly sprayed on the raw material fed into the ion injection pipe through the discharge nozzle, so that efficient raw material filling work can be carried out, avoiding dispersion during the polymerization process due to quality influence, and improving the production effect of polyether ether ketone products.

[0037] 3. During the operation of the polyether ether ketone production equipment of the present invention, it is conveyed to the inside of the raw material feeding port through a conveyor belt, and the powder roller is driven to rotate by a reduction motor. During the rotation of the powder roller, the polyether ether ketone raw material is ground and crushed. During the transportation process, the heat-conducting feeding plate is heated to 150 °C by a constant-temperature mold temperature machine. Inside the conveyor crusher, the raw material on the surface of the heat-conducting feeding plate is heated during the vibrating feeding process, so as to meet the crushing requirements of terephthalic acid and difluorobenzophenone, and improve the subsequent polymerization work efficiency. Description of the Drawings

[0038] Figure 1It is a flow chart of the production process of the present invention;

[0039] Figure 2 It is an isometric view of the front view of the production equipment of the present invention;

[0040] Figure 3 It is an isometric view of the side view of the production equipment of the present invention;

[0041] Figure 4 It is the internal structure diagram of the conveying and pulverizing machine of the present invention;

[0042] Figure 5 It is the internal structure diagram of the ion injection tube and the polymerization kettle of the present invention;

[0043] Figure 6 For the present invention Figure 4 Partial enlarged view of area A in.

[0044] In the figure: 1, conveying and pulverizing machine; 101, raw material inlet; 102, maintenance plate; 103, reduction motor; 104, guide frame; 105, conveyor belt; 106, conveying pipe; 107, servo motor; 108, constant temperature mold temperature machine; 109, heat-conducting blanking plate; 110, powder roller; 111, guide shaft; 112, positioning sleeve plate; 113, telescopic valve plate; 114, blanking port; 2, ion injection tube; 201, stepping motor; 202, solid-liquid introduction box; 203, storage tank; 204, spraying pump; 205, supplementary feeding inlet; 206, discharging nozzle; 207, screw conveyor; 3, polymerization kettle; 301, first driving motor; 302, drainage pipe; 303, solenoid valve; 304, driving rotating shaft; 305, dispersing paddle; 306, stirring paddle; 4, cooling tank; 401, heat exchange pipe; 402, pressurizing pump; 403, guide pipe; 404, longitudinal conveying pipe; 5, synthesis kettle; 501, second driving motor. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] In order to solve the problems that in the actual use process of the existing polyetheretherketone production device, the produced polyetheretherketone products need to be processed later to improve the wear resistance effect, the production difficulty is large, and the efficiency is not good, please refer to Figure 1 , the following technical solutions are provided in this embodiment:

[0047] A polyetheretherketone production process with high wear resistance and low friction coefficient includes the following steps:

[0048] Step 1: Screen and prepare the raw materials;

[0049] Step 2: Crush the screened raw materials. The production method of polyetheretherketone adopts a continuous one-piece processing method, enabling continuous processing of polyetheretherketone. Through the screening and crushing processes, the polymerization and polymerization effects are enhanced;

[0050] Step 3: After processing, perform the feeding operation. During the feeding operation, carry out plasma treatment and simultaneously supplement molybdenum disulfide liquid into the feeding structure to synchronously perform the feeding work. During the feeding operation, carry out plasma treatment and simultaneously supplement molybdenum disulfide liquid into the feeding structure to synchronously perform the feeding work. Adopt the plasma treatment process. By injecting inert gas into the feeding structure and then discharging electricity inside the feeding structure, the inert gas generates plasma to perform plasma treatment on the polyetheretherketone raw materials, changing the surface properties of the polyetheretherketone raw materials, which is beneficial to improving the bonding performance and enhancing the bonding strength. By supplementing molybdenum disulfide liquid, the solid after the polymerization of molybdenum disulfide and the raw materials can significantly reduce the friction coefficient and improve the wear resistance, thus meeting the actual application requirements;

[0051] Step 4: Under acidic conditions, perform the polymerization work on the raw materials. During the polymerization work, raise the temperature and start nitrogen replacement. On the one hand, wait for the nitrogen replacement to be completed, and on the other hand, fully melt and dissolve the raw and auxiliary materials. After the nitrogen replacement is completed and the pressure in the kettle returns to normal, then heat and carry out the polymerization reaction according to the set heating curve. Set the initial temperature at 200–250 °C to remove residual moisture and small molecule by-products, and set the later temperature at 280–300 °C for deep cross-linking to optimize the material properties;

[0052] Step 5: After the polymerization is completed, quickly carry out the cooling work. Through water cooling or oil cooling for shaping, resin particles with uniform particle size are obtained. After cooling, carry out the polycondensation treatment work;

[0053] Step 6: Cool the reaction polymer, separate the polymer and the solvent by precipitation, wash and dry to obtain polyetheretherketone powder. By injecting pure water, then carry out cooking and stirring. After the pure water fully dissolves the inorganic salts, drain the water, carry out cleaning. After the inorganic salts are completely cleaned, then carry out drying and granulation. Adopt vacuum drying operation, and set the drying temperature at 180–220 °C to avoid degradation, and obtain polyetheretherketone;

[0054] The production process of high wear-resistant and low friction coefficient polyetheretherketone is realized by using a production equipment for high wear-resistant and low friction coefficient polyetheretherketone.

[0055] Preferably, the raw materials in Step 1 include:

[0056] Terephthalic acid;

[0057] Difluorobenzophenone;

[0058] Concentrated sulfuric acid catalyst;

[0059] Diphenyl sulfone solvent;

[0060] The raw material ratio is 1:1:0.2:0.3 by weight parts;

[0061] The raw materials are dried, metered after drying, and screened and prepared according to the ratio.

[0062] Preferably, in step five, the polycondensation treatment work includes extraction work, and the extraction work includes the following steps:

[0063] S1: Extract the crude polymer after polymerization;

[0064] S2: Introduce the extraction liquid, add steam to the outer coil for heating and assist in stirring;

[0065] S3: Drain the extraction liquid;

[0066] S4: Repeat the extraction work. After complete and sufficient extraction, export the polymer.

[0067] Specifically, the production method of polyetheretherketone adopts a continuous one-piece processing method, which can carry out continuous polyetheretherketone processing. Through screening and crushing treatment work, the polymerization and polymerization effects are improved. In the feeding work, plasma treatment work is carried out, and at the same time, molybdenum disulfide liquid is supplemented into the feeding structure to synchronously carry out the feeding work. The plasma treatment process is adopted. By injecting inert gas into the feeding structure and then discharging electricity inside the feeding structure, the inert gas generates plasma, and the polyetheretherketone raw materials are subjected to plasma treatment, so that the surface properties of the polyetheretherketone raw materials are changed, which is beneficial to improving the bonding performance and increasing the bonding strength. By supplementing molybdenum disulfide liquid, the solid after the polymerization of molybdenum disulfide and the raw materials can significantly reduce the friction coefficient and improve the wear resistance, so as to meet the actual application requirements.

[0068] In order to solve the problem that in the actual use process of the existing polyetheretherketone production device, the feeding effect is not good, affecting continuous operation and not conducive to improving work efficiency, please refer to Figure 2 - Figure 4 , this embodiment provides the following technical solutions:

[0069] A polyetheretherketone production device with high wear resistance and low friction coefficient, including a conveying crusher 1, an ion injection tube 2, a polymerization kettle 3, a cooling tank 4 and a synthesis kettle 5. The lower end of the conveying crusher 1 is provided with a discharge port 114, and the ion injection tube 2 is respectively connected to the feed port of the polymerization kettle 3 and the discharge port 114 of the conveying crusher 1;

[0070] Inside the conveying and pulverizing machine 1, a constant-temperature mold temperature machine 108 is installed. At the upper end of the constant-temperature mold temperature machine 108, a heat-conducting feeding plate 109 is installed. At the lower end of the heat-conducting feeding plate 109, a vibrating disk is provided. During the conveying process, the heat-conducting feeding plate 109 is heated to 150 degrees Celsius by the constant-temperature mold temperature machine 108 inside the conveying and pulverizing machine 1, so that the raw materials on the surface of the heat-conducting feeding plate 109 can increase the temperature of the raw materials during the vibrating feeding process, thereby meeting the crushing requirements of terephthalic acid and difluorobenzophenone and improving the subsequent polymerization work efficiency;

[0071] At the upper end of the ion implantation tube 2, a solid-liquid introduction box 202 is provided. Outside the solid-liquid introduction box 202, a spraying pump 204 is provided. At one end of the solid-liquid introduction box 202, a storage tank 203 is installed. On one side of the storage tank 203, a gas guide pipe is provided.

[0072] On one side of the upper end of the conveying and pulverizing machine 1, a raw material inlet 101 for introducing raw materials is provided. Below the raw material inlet 101, it is connected to the heat-conducting feeding plate 109. Inside the conveying and pulverizing machine 1, a powder roller 110 is installed. Above the powder roller 110, a maintenance plate 102 is provided. On one side of the conveying and pulverizing machine 1, a guiding frame 104 is installed. Inside the guiding frame 104, a conveyor belt 105 is installed. In the middle of the conveyor belt 105, a servo motor 107 is provided. The servo motor 107 is meshed and connected to the inner surface of the conveyor belt 105 through gears, realizing automatic feeding and meeting the requirements of continuous operation.

[0073] On the outside of one side of the conveying and pulverizing machine 1, a reduction motor 103 is installed. The motor shaft of the reduction motor 103 is connected to a guiding shaft 111. The guiding shaft 111 is fixedly connected to the motor shaft of the reduction motor 103 and the powder roller 110 respectively through couplings. Below the powder roller 110, a telescopic valve plate 113 is installed. On the outer surface of the telescopic valve plate 113, an integrally formed grinding surface is provided. On one side of the telescopic valve plate 113, a positioning sleeve plate 112 is installed. Inside the positioning sleeve plate 112, a threaded lead screw is provided, and one end of the telescopic valve plate 113 extends into the positioning sleeve plate 112 and is threadedly connected to the threaded lead screw. During the operation of the polyether ether ketone production equipment, the raw materials are conveyed to the inside of the raw material inlet 101 through the conveyor belt 105. The powder roller 110 is driven to rotate by the reduction motor 103. During the rotation of the powder roller 110, the polyether ether ketone raw materials are ground and crushed. The telescopic valve plate 113 is automatically opened and closed, thus facilitating the adjustment of the feeding work.

[0074] Specifically, during operation, the polyetheretherketone production equipment is transported to the inside of the raw material feed port 101 through the conveyor belt 105, and the powder roller 110 is driven to rotate by the reduction motor 103. During the rotation of the powder roller 110, the polyetheretherketone raw material is ground and crushed. During the transportation process, the heat-conducting blanking plate 109 is heated to 150 degrees Celsius by the constant temperature mold temperature controller 108. Inside the conveying crusher 1, the raw material on the surface of the heat-conducting blanking plate 109 is increased in the process of vibration blanking, thereby meeting the crushing requirements of terephthalic acid and difluorobenzophenone, so as to improve the efficiency of subsequent polymerization work.

[0075] In order to solve the problem that the existing polyetheretherketone production equipment is difficult to operate in the later stage during actual use, which affects the work efficiency and product quality, please refer to Figure 2 - Figure 3 , Figure 5 - Figure 6 , this embodiment provides the following technical solutions:

[0076] A stepper motor 201 is installed at the lower end of the ion injection tube 2, and the stepper motor 201 is fixedly connected to the ion injection tube 2, and a conveying pipe 106 is arranged between the lower end of the ion injection tube 2 and the discharge port 114. When the polyetheretherketone production equipment is in operation, the crushed polyetheretherketone raw material is transmitted by the conveying pulverizer 1, and the conveying work is carried out through the ion injection tube 2. The conveying pipe 106 is connected with the ion injection tube 2 and the discharge port 114 respectively, and a screw conveyor 207 is installed inside the ion injection tube 2. The screw conveyor 207 is connected to the motor shaft of the stepper motor 201 through a reducer transmission. During the conveying process, the screw conveyor 207 continuously spirally feeds the material. During the feeding process, the molybdenum disulfide liquid is sucked in by the spray pump 204, and then evenly sprayed into the raw material fed by the ion injection tube 2 through the discharge nozzle 206, so that efficient raw material filling work can be carried out, avoiding the influence of quality during the polymerization process, and dispersion is carried out, thereby improving the production effect of polyetheretherketone products.

[0077] The solid-liquid introduction box 202 is embedded in the interior of the ion injection tube 2 and fixedly connected to the ion injection tube 2, and a plurality of spray pumps 204 are provided, and the plurality of spray pumps 204 are evenly arranged in the interior of the solid-liquid introduction box 202. A feed inlet 205 is provided on the outside of the spray pump 204, and a discharge nozzle 206 is installed at the lower end of the spray pump 204. The discharge nozzle 206 extends to the interior of the ion injection tube 2 and is sealed and connected to the ion injection tube 2. The evenly distributed spray pumps 204 are installed through the solid-liquid introduction box 202, and the spray pumps 204 can inject the molybdenum disulfide in the solid-liquid introduction box 202 into the interior of the ion injection tube 2.

[0078] A first drive motor 301 is installed at the upper end of the polymerization kettle 3, and a diversion pipe 302 is installed above the polymerization kettle 3. The diversion pipe 302 is communicated with the polymerization kettle 3. The lower end of the motor shaft of the first drive motor 301 is installed with a drive rotating shaft 304. A dispersion paddle 305 is installed on the outer part of the middle of the drive rotating shaft 304, and a stirring paddle 306 is installed at the lower end of the drive rotating shaft 304.

[0079] The cooling tank 4 is installed on one side of the polymerization kettle 3. A heat exchange pipe 401 is installed outside the cooling tank 4. A solenoid valve 303 is installed at the lower end of the polymerization kettle 3. Flow guide pipes 403 are installed on both sides of the cooling tank 4. The flow guide pipes 403 are respectively hermetically communicated with the synthesis kettle 5 and the solenoid valve 303. A longitudinal conveying pipe 404 is installed at one end of the flow guide pipe 403. A pressure pump 402 is installed at the upper end of the longitudinal conveying pipe 404. The synthesis kettle 5 is installed on one side of the cooling tank 4. A second drive motor 501 is installed at the upper end of the synthesis kettle 5. A heater and a stirrer are arranged inside the synthesis kettle 5. Through high-temperature heating in the synthesis kettle 5, under nitrogen protection, it is polymerized with the monomer in proportion, slowly heated to 150–200 °C for polymerization work. After the polymerization is completed, the reaction polymer is cooled, and the polymer and the solvent are separated by precipitation. After washing and drying, polyether ether ketone powder is obtained. By injecting pure water, then steaming and stirring, after the pure water fully dissolves the inorganic salts, the water is discharged for cleaning. After the inorganic salts are completely cleaned, then drying and granulation are carried out. Vacuum drying operation is adopted, and the drying temperature is set at 180–220 °C to avoid degradation, and polyether ether ketone is obtained.

[0080] Specifically, during the operation of the polyether ether ketone production equipment, the crushed polyether ether ketone raw materials are transported through the conveying and pulverizing machine 1, and the conveying work is carried out through the ion injection pipe 2. The solid-liquid introduction box 202 is equipped with evenly distributed spraying pumps 204. The spraying pumps 204 can inject molybdenum disulfide inside the solid-liquid introduction box 202 into the inside of the ion injection pipe 2. During the conveying process of the screw conveyor 207, continuous spiral feeding is carried out. During the feeding process, the molybdenum disulfide liquid is pumped into through the spraying pump 204 and then evenly sprayed on the raw materials fed into the ion injection pipe 2 through the discharge spray head 206, so that efficient raw material filling work can be carried out, avoiding dispersion during the polymerization process due to quality effects, and improving the production effect of the polyether ether ketone product.

[0081] Working principle: During use, terephthalic acid, benzophenone difluoride, concentrated sulfuric acid catalyst, and diphenyl sulfone solvent are screened and prepared, with the ratio being 1:1:0.2:0 by weight parts.3. Terephthalic acid and benzophenone difluoride are conveyed and pulverized by the conveying pulverizer 1, conveyed to the inside of the raw material inlet 101 through the conveyor belt 105, and the powder roller 110 is driven to rotate by the reduction motor 103. During the rotation of the powder roller 110, terephthalic acid and benzophenone difluoride are ground and crushed. During the conveying process, the heat-conducting blanking plate 109 is heated to 150 °C by the constant-temperature mold temperature machine 108. Inside the conveying pulverizer 1, the raw materials on the surface of the heat-conducting blanking plate 109 are heated during the vibrating blanking process, so as to meet the crushing requirements of terephthalic acid and benzophenone difluoride, improve the subsequent polymerization work efficiency, and the pulverized polyetheretherketone raw materials are transported through the conveying pulverizer 1. The conveying work is carried out through the ion injection tube 2. The spraying pumps 204 are evenly distributed through the solid-liquid introduction box 202. The spraying pumps 204 can inject molybdenum disulfide inside the solid-liquid introduction box 202 into the inside of the ion injection tube 2. During the conveying process of the screw conveyor 207, continuous screw feeding is carried out. During the feeding process, the molybdenum disulfide liquid is pumped in by the spraying pump 204, and then evenly sprayed on the raw materials fed into the ion injection tube 2 through the discharge nozzle 206, so as to carry out efficient raw material filling work, avoid dispersion during the polymerization process due to quality influence, and improve the production effect of polyetheretherketone products. The process of plasma treatment is adopted. By injecting inert gas into the feeding structure and then discharging electricity inside the feeding structure, the inert gas generates plasma to perform plasma treatment on the polyetheretherketone raw materials, changing the surface properties of the polyetheretherketone raw materials, which is beneficial to improving the bonding performance and increasing the bonding strength. By supplementing the molybdenum disulfide liquid, the solid formed after the polymerization of molybdenum disulfide and the raw materials can significantly reduce the friction coefficient and improve the wear resistance, thus meeting the actual application requirements. Under acidic conditions, the polymerization kettle 3 polymerizes the raw materials, adds concentrated sulfuric acid catalyst and diphenyl sulfone solvent, heats up, and starts nitrogen replacement. On the one hand, wait for the nitrogen replacement to be completed, and on the other hand, make the raw and auxiliary materials fully melt and dissolve. After the nitrogen replacement is completed, the pressure in the kettle returns to normal pressure state, and then the heating polymerization reaction is carried out according to the set heating curve. The initial temperature is set at 200–250 °C to remove residual moisture and small molecule by-products, and the later temperature is set at 280–300 °C for deep cross-linking to optimize the material properties. After the polymerization is completed, rapid cooling is carried out, and the resin particles with uniform particle size are obtained through cooling and shaping by the cooling tank 4. After cooling, it is introduced into the synthesis kettle 5, and the polymer and the solvent are separated by precipitation. After washing and drying, polyetheretherketone powder is obtained. By injecting pure water, then cooking and stirring, after the pure water fully dissolves the inorganic salts, the water is discharged, and cleaning is carried out. After the inorganic salts are completely cleaned, then drying and granulation are carried out. Vacuum drying operation is adopted, and the drying temperature is set at 180–220 °C to avoid degradation, and polyetheretherketone is obtained.

[0082] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0083] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A process for producing polyetheretherketone with high wear resistance and low friction coefficient, characterized in that: The steps include: Step 1: Screening and preparing raw materials; Step 2: crushing the screened raw materials; Step 3: After the treatment, the material is fed, during which plasma treatment is performed, and molybdenum disulfide liquid is added to the feeding structure to perform feeding simultaneously; Step 4: polymerizing the raw materials under acidic conditions; Step 5: After the polymerization is completed, the cooling work is carried out quickly, and after cooling, the polycondensation treatment work is carried out; Step 6: Cooling the reaction polymer, separating the polymer and the solvent by precipitation, washing and drying to obtain polyetheretherketone powder; The polyetheretherketone production process with high wear resistance and low friction coefficient is realized by using a polyetheretherketone production equipment with high wear resistance and low friction coefficient.

2. A process for producing polyetheretherketone with high wear resistance and low friction coefficient according to claim 1, characterized in that: The raw materials in step 1 include: Terephthalic acid; Difluorobenzophenone; Concentrated sulfuric acid catalyst; Diphenyl sulfone solvent; The raw materials are dried, weighed after drying, and screened and prepared according to proportion.

3. A process for producing polyetheretherketone with high wear resistance and low friction coefficient according to claim 2, characterized in that: In the step 5, the polycondensation treatment includes extraction, and the extraction includes the following steps: S1: extracting the crude polymer after polymerization; S2: The extract is introduced and steam is added to the outer coil for auxiliary stirring; S3: discharge the extract; S4: Repeat the extraction process and after the extraction is complete, derive the polymer.

4. An apparatus for the production process of polyetheretherketone with high wear resistance and low friction coefficient as claimed in claim 1, characterized in that: The invention comprises a conveying pulverizer (1), an ion injection tube (2), a polymerization kettle (3), a cooling tank (4) and a synthesis kettle (5); a feed opening (114) is arranged at the lower end of the conveying pulverizer (1); and the ion injection tube (2) is respectively connected to the feed opening of the polymerization kettle (3) and the feed opening (114) of the conveying pulverizer (1); A constant temperature mold temperature controller (108) is installed inside the conveyor pulverizer (1), a heat conduction blanking plate (109) is installed at the upper end of the constant temperature mold temperature controller (108), and a vibration plate is provided at the lower end of the heat conduction blanking plate (109); A solid-liquid introduction box (202) is provided at the upper end of the ion injection tube (2), a spray pump (204) is provided outside the solid-liquid introduction box (202), a material storage tank (203) is installed at one end of the solid-liquid introduction box (202), and an air guide pipe is provided on one side of the material storage tank (203).

5. The polyetheretherketone production equipment with high wear resistance and low friction coefficient according to claim 4 is characterized in that: A raw material feed port (101) for introducing raw materials is provided on one side of the upper end of the conveyor pulverizer (1), and a heat-conducting unloading plate (109) is connected below the raw material feed port (101). A powder roller (110) is installed inside the conveyor pulverizer (1), and an inspection plate (102) is provided above the powder roller (110). A guide frame (104) is installed on one side of the conveyor pulverizer (1), and a conveyor belt (105) is installed inside the guide frame (104). A servo motor (107) is provided in the middle of the conveyor belt (105), and the servo motor (107) is meshedly connected to the inner surface of the conveyor belt (105) through a gear.

6. The polyetheretherketone production equipment with high wear resistance and low friction coefficient according to claim 5, characterized in that: A reduction motor (103) is installed on one side of the outside of the conveying pulverizer (1), and the motor shaft of the reduction motor (103) is connected to a guide shaft (111), and the guide shaft (111) is fixedly connected to the motor shaft of the reduction motor (103) and the powder roller (110) through a coupling, respectively. A telescopic valve plate (113) is installed below the powder roller (110), and the outer surface of the telescopic valve plate (113) is provided with an integrally formed polished surface. A positioning sleeve (112) is installed on one side of the telescopic valve plate (113), and a threaded screw is provided inside the positioning sleeve (112), and one end of the telescopic valve plate (113) extends to the inside of the positioning sleeve (112) and is threadedly connected to the threaded screw.

7. The production process and equipment of polyetheretherketone with high wear resistance and low friction coefficient according to claim 4, characterized in that: A stepper motor (201) is installed at the lower end of the ion injection tube (2), the stepper motor (201) is fixedly connected to the ion injection tube (2), and a conveying pipe (106) is arranged between the lower end of the ion injection tube (2) and the discharge port (114), the conveying pipe (106) is communicated with the ion injection tube (2) and the discharge port (114) respectively, and a screw conveyor (207) is installed inside the ion injection tube (2), and the screw conveyor (207) is connected to the motor shaft of the stepper motor (201) through a reducer.

8. The polyetheretherketone production equipment with high wear resistance and low friction coefficient according to claim 7 is characterized in that: The solid-liquid introduction box (202) is embedded in the interior of the ion injection tube (2) and is fixedly connected to the ion injection tube (2), and a plurality of spray pumps (204) are provided, and the plurality of spray pumps (204) are evenly arranged in the interior of the solid-liquid introduction box (202). A feed inlet (205) is provided on the outside of the spray pump (204), and a discharge nozzle (206) is installed at the lower end of the spray pump (204), and the discharge nozzle (206) extends to the interior of the ion injection tube (2) and is sealed and connected to the ion injection tube (2).

9. The polyetheretherketone production equipment with high wear resistance and low friction coefficient according to claim 4, characterized in that: A first driving motor (301) is installed at the upper end of the polymerization kettle (3), and a drainage pipe (302) is installed above the polymerization kettle (3), and the drainage pipe (302) is connected to the polymerization kettle (3). A driving shaft (304) is installed at the lower end of the motor shaft of the first driving motor (301), a dispersion paddle (305) is installed in the middle outer part of the driving shaft (304), and a stirring paddle (306) is installed at the lower end of the driving shaft (304).

10. The polyetheretherketone production equipment with high wear resistance and low friction coefficient according to claim 4, characterized in that: The cooling tank (4) is installed on one side of the polymerization kettle (3), a heat exchange tube (401) is installed on the outside of the cooling tank (4), a solenoid valve (303) is installed at the lower end of the polymerization kettle (3), flow guide tubes (403) are installed on both sides of the cooling tank (4), the flow guide tubes (403) are respectively connected to the synthesis kettle (5) and the solenoid valve (303) in a sealed manner, a longitudinal delivery tube (404) is installed at one end of the flow guide tube (403), a booster pump (402) is installed at the upper end of the longitudinal delivery tube (404), the synthesis kettle (5) is installed on one side of the cooling tank (4), a second drive motor (501) is installed at the upper end of the synthesis kettle (5), and a heater and a stirrer are arranged inside the synthesis kettle (5).

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