Vinyl record raw material particle formula and application method

Abstract

The invention discloses a formula and an application method of a vinyl record raw material particle. The formula comprises the following components: a vinyl chloride-vinyl acetate copolymer, chlorinated paraffin, a flexibilizer, a lubricant, a stabilizer, calcium carbonate and a pigment. The application method comprises the following steps: step 1, mixing raw material particles of the vinyl record according to a proportion by utilizing the self-adaptive simulated annealing model, and solving an optimal proportion; 2, feeding the mixed raw materials into an extruder, and extruding the mixed raw materials into sheets or strips through a mold; step 3, pressing into the shape of a record through a mold; step 4, cooling the pressed record; and 5, polishing and painting the surface of the record, and detecting the quality of the manufactured record. The tone quality, the wear resistance and the storage performance of the vinyl record are greatly improved, and meanwhile the production cost and the complexity are reduced.

Description

Technical Field

[0001] The invention is based on the field of vinyl record production, and more specifically relates to a vinyl record raw material particle formula and an application method. Background Art

[0002] In the production process of traditional vinyl records, the processing and molding technology of raw materials have an important impact on the quality of the records.

[0003] As a classic audio recording medium, vinyl records have always been favored by music lovers and collectors for their unique sound quality and retro charm. Traditional vinyl records mostly use vinyl as the main raw material, and a spiral track is formed on the surface through a pressing process, and then the sound is read and played with a stylus and a cartridge.

[0004] However, with the development of science and technology and the continuous advancement of audio recording technology, traditional vinyl records have gradually revealed some shortcomings in production technology, sound quality, wear resistance and preservation performance. For example, although vinyl materials have good flexibility and sound quality, their wear resistance is relatively poor. After long-term use, they are prone to scratches and wear, affecting the sound quality and life of the record. In addition, traditional vinyl records also have certain limitations in terms of preservation performance.

[0005] Therefore, the present invention discloses a vinyl record raw material particle formula and application method, which solves the problems existing in the prior art by optimizing the raw material ratio and production process, improves the sound quality, wear resistance, and preservation performance of vinyl records, while reducing production costs and complexity to meet market demand. Summary of the invention

[0006] In view of the deficiencies of the above-mentioned technologies and the deficiencies of traditional vinyl records in production process, sound quality performance, wear resistance and preservation performance, the present invention discloses a vinyl record raw material particle formula and application method to improve the sound quality, wear resistance and preservation performance of vinyl records to meet user needs.

[0007] A raw material particle formula for a vinyl record, comprising the following components: 80-120 parts of vinyl chloride-vinyl acetate copolymer, 2-5 parts of chlorinated paraffin, 1-3 parts of toughening agent, 0.5-2.5 parts of lubricant, 0.5-2.5 parts of stabilizer, 0.1-2 parts of calcium carbonate and 0.5-1.5 parts of pigment; The vinyl chloride-vinyl acetate copolymer optimizes the processing performance, physical and mechanical properties and chemical stability of the material by adjusting the monomer ratio through an adaptive simulated annealing model; the physical and mechanical properties include at least hardness, toughness and wear resistance; the adaptive simulated annealing model finds the global optimal or near-global optimal formula ratio by jumping out of the local optimal formula ratio, and dynamically adjusts the parameter temperature attenuation factor according to the feedback information in the search process; the adaptive simulated annealing model includes an initial solution generation module, a target evaluation module, a neighborhood solution generation module, an acceptance criterion module, a parameter update and adaptive adjustment module and a convergence termination module; the initial solution generation module The signal output end of the target evaluation module is connected to the signal input end of the target evaluation module, the signal output end of the target evaluation module is connected to the signal input end of the neighborhood solution generation module, the signal output end of the neighborhood solution generation module is connected to the signal input end of the receiving criterion module, the signal output end of the receiving criterion module is connected to the signal input end of the parameter update and adaptive adjustment module, and the signal output end of the parameter update and adaptive adjustment module is connected to the signal input end of the convergence termination module; the adaptive simulated annealing model first searches for the formula ratio within the primary search range, and then narrows the search range to enter the secondary search range for search. As a further embodiment of the present invention, the preparation process of the vinyl chloride-vinyl acetate copolymer is: S1. Prepare raw materials, vinyl chloride, vinyl acetate, initiator, dispersant, chain linker and terminator; the initiator is an azo compound, the dispersant is polyvinyl alcohol, the chain linker is mercaptan, and the terminator is hydrogen peroxide; S2, vacuuming and deoxygenating the reactor to remove oxygen and other impurities therein; the temperature of the reactor is set above 50°C, the pressure is maintained above 1MPa, and the oxygen content is 0; the working process of the reactor is: starting the vacuum system, vacuuming the reactor to remove oxygen and other impurities therein; after vacuuming, filling the reactor with inert gas nitrogen to maintain an inert atmosphere in the reactor to prevent oxygen from re-entering; S3. Using the adaptive simulated annealing model to set the ratio of raw materials, and stirring to ensure uniform mixing; the ratio of vinyl chloride to vinyl acetate is in the range of 83:17 to 91:11; when the ratio of vinyl chloride to vinyl acetate is 83:17, the hardness of the vinyl record is in the range of 70 to 85 Shore D, the flexibility is high flexibility, the fluidity of the vinyl chloride-vinyl acetate copolymer is high fluidity, and the processing difficulty is low processing difficulty; when the ratio of vinyl chloride to vinyl acetate is 91:11, the hardness of the vinyl record is in the range of 85 to 95 Shore D, the flexibility is medium flexibility, the fluidity of the vinyl chloride-vinyl acetate copolymer is medium fluidity, and the processing difficulty is medium processing difficulty; S4, raising the temperature of the reactor to 60°C-70°C and the pressure to 1MPa-3MPa; after the temperature of the reaction system reaches the set temperature, adding the initiator, the initiator accelerates the copolymerization reaction, so that the molecular chains of vinyl chloride and vinyl acetate are connected to form a copolymer; the chemical product synthesized by the vinyl chloride-vinyl acetate copolymer is unbalanced as shown below: S5. Under constant temperature stirring, the reaction continues. When the pressure of the reactor drops to 0.2MPa~0.25MPa, it means that the reaction is nearly completed. S6. After the reaction is completed, the obtained slurry needs to be subjected to steam stripping treatment and centrifuge dehydration to remove the solvent and unreacted monomers. The dehydrated material is sent to an air flow drying tower by a screw conveyor for drying. The dried material is captured by a cyclone separator and sieved by a vibrating screen to obtain vinyl chloride-vinyl acetate copolymer particles.

[0008] As a further embodiment of the present invention, the toughening agent is polyamide, and the polyamide increases the flexibility of the vinyl chloride-vinyl acetate copolymer. When the proportion of the polyamide exceeds 3.4%, the hardness of the vinyl record is 45~60 Shore D, and when the proportion of the polyamide is less than 0.7%, the hardness of the vinyl record is 98~102 Shore D; the lubricant includes an internal lubricant and an external lubricant, the internal lubricant is calcium stearate, and the external lubricant is PE wax; the stabilizer is magnesium stearate. As a further embodiment of the present invention, the adaptive simulated annealing model randomly walks in the search interval, and uses the Metropolis criterion to make the random walk gradually converge to the local optimal formula ratio; , the probability of transitioning from state 1 to state 2 is: After iteration and solution transformation, the relative optimal solution of the formula ratio combination optimization problem is obtained, the value of the temperature attenuation factor is reduced, and the Metropolis criterion is repeatedly executed. When the temperature attenuation factor approaches 0, the optimal formula ratio is finally obtained.

[0009] As a further embodiment of the present invention, the working principle of the adaptive simulated annealing model is: Initializing parameters, wherein the parameters include at least an initial temperature, a temperature attenuation factor, the number of iterations at each temperature, and a termination condition; randomly generating a combination of formula proportions as an initial solution; Calculate the comprehensive performance index of the record according to the current raw material ratio, wherein the comprehensive performance index at least includes a sound quality score and a durability score, and use the comprehensive performance index as the objective function value; Based on the current solution, a new solution is generated by randomly adjusting the proportion of a certain raw material; the increment is calculated according to the Metropolis criterion , calculate the difference between the objective function of the new solution and the current solution, Then accept the new solution as the current solution, otherwise accept the new solution as the current solution with probability P; if the termination condition is met, output the current solution as the optimal solution, that is, the optimal number formula ratio, and end the program; The temperature attenuation factor gradually decreases until it reaches 0, and then jumps to (2).

[0010] As a further embodiment of the present invention, the method for applying the raw material particles of a vinyl record comprises the following steps: Step 1: Use the adaptive simulated annealing model to mix the raw material particles of the vinyl record in proportion to solve the optimal proportion; the proportion of the vinyl chloride-vinyl acetate copolymer is in the range of 85.1% to 96.7%, the proportion of the chlorinated paraffin is in the range of 1.5% to 5.7%, the proportion of the toughening agent is in the range of 0.7% to 3.4%, the proportion of the lubricant is in the range of 0.4% to 2.9%, the proportion of the stabilizer is in the range of 0.4% to 2.9%, and the proportion of the calcium carbonate is in the range of 0.1% to 2.3%; dry and screen the raw material particles of the vinyl record; Step 2: The mixed raw materials are fed into an extruder, heated to a temperature of 150°C to 200°C, heated to a molten state, and extruded into a sheet or strip through a die at a pressure of 55MPa to 80MPa; Step 3: feeding the extruded sheet or strip into a tablet press and pressing it into the shape of a record through a mold; Step 4: The pressed record is cooled at a temperature of 10°C to 25°C to quickly set and maintain a stable shape; Step 5: Polish and paint the surface of the record to improve its appearance quality and protective performance, and conduct quality inspection on the produced record, including at least appearance inspection and sound quality test.

[0011] As a further embodiment of the present invention, the drying method is to use a spray dryer or an airflow drying tower device for drying, expose the particles to a high-temperature airflow, evaporate the water through heat exchange, and achieve the purpose of drying, the drying temperature is set to 28°C~32°C, and the drying time is set to 30min~45min; the screening method is to use the vibrating screen to screen the particles, pass the particles through the screen, collect the particles that meet the specifications, and retain the particles with a diameter of 0.9mm~1.2mm.

[0012] As a further embodiment of the present invention, the extruder includes a bracket, a hopper, a motor, a screw rod, a screw, a barrel, a thrust bearing shaft and a thermometer hole; the bracket is located at the bottom of the extruder and is responsible for supporting and fixing the extruder; the hopper is a container for storing the material to be extruded and is located at the top of the extruder; the motor is responsible for driving the screw rod or the extrusion mechanism to rotate and is located on the left side of the extruder; the screw rod is located on the right side inside the extruder and pushes the material from the hopper into the barrel by rotation, and plasticizes the material in the barrel by shearing, friction and mixing; the fasteners for screwing or fixing the various components of the extruder are located on the left side of the extruder; the barrel surrounds the screw rod and forms a closed extrusion space, and the material is squeezed and rubbed by the screw rod in the barrel, gradually plasticized and pushed forward; the thrust bearing shaft is used to support the screw rod and withstand the axial thrust generated by it during the extrusion process, and is located on the left side of the extruder; the thermometer hole is used to display the temperature and is located on the right side of the extruder.

[0013] Positive beneficial effects A formula for raw material particles for vinyl records and an application method thereof adopt vinyl chloride-vinyl acetate copolymer as a basis to enhance the wear resistance of vinyl records, and vinyl chloride-vinyl acetate copolymer is resistant to chemical corrosion, which means that vinyl records are not easily corroded by chemical substances during storage and use, thereby maintaining the integrity of sound quality and appearance; a formula for raw material particles for vinyl records and an application method thereof adjust the raw material formula ratio through an adaptive simulated annealing model to obtain raw material particles for vinyl records with better performance and higher quality, which helps to improve the key performance indicators of sound quality, wear resistance and storage stability of vinyl records, and meet the higher demands of music lovers and professionals. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 This is a specific flow chart of a vinyl record raw material particle formula and application method of the present invention; Figure 2 It is a schematic diagram of the structure of an extruder for a vinyl record raw material particle formula and application method of the present invention; Figure 3 A flow chart of the preparation of vinyl chloride-vinyl acetate copolymer according to a raw material particle formula and application method of a vinyl record of the present invention; Figure 4This is a schematic diagram of the proportion of raw materials in a vinyl record raw material particle formula and application method of the present invention. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example

[0016] A raw material particle formula for a vinyl record, comprising the following components: Vinyl chloride-vinyl acetate copolymer, chlorinated paraffin, toughening agent, lubricant, stabilizer, calcium carbonate and pigment; The vinyl chloride-vinyl acetate copolymer optimizes the processing performance, physical and mechanical properties and chemical stability of the material by adjusting the monomer ratio through an adaptive simulated annealing model; the physical and mechanical properties include at least hardness, toughness and wear resistance; the adaptive simulated annealing model finds the global optimal or near-global optimal formula ratio by jumping out of the local optimal formula ratio, and dynamically adjusts the parameter temperature attenuation factor according to the feedback information in the search process; the adaptive simulated annealing model includes an initial solution generation module, a target evaluation module, a neighborhood solution generation module, an acceptance criterion module, a parameter update and adaptive adjustment module and a convergence termination module; the initial solution generation module The signal output end of the target evaluation module is connected to the signal input end of the neighborhood solution generation module, the signal output end of the neighborhood solution generation module is connected to the signal input end of the receiving criterion module, the signal output end of the receiving criterion module is connected to the signal input end of the parameter update and adaptive adjustment module, and the signal output end of the parameter update and adaptive adjustment module is connected to the signal input end of the convergence termination module; the adaptive simulated annealing model first performs a formula ratio search within the primary search range, and then narrows the search range to enter the secondary search range for search.

[0017] The preparation process of the vinyl chloride-vinyl acetate copolymer is: S1. Prepare raw materials, vinyl chloride, vinyl acetate, initiator, dispersant, chain linker and terminator; the initiator is an azo compound, the dispersant is polyvinyl alcohol, the chain linker is mercaptan, and the terminator is hydrogen peroxide; S2, vacuuming and deoxygenating the reactor to remove oxygen and other impurities therein; the temperature of the reactor is set above 50°C, the pressure is maintained above 1MPa, and the oxygen content is 0; the working process of the reactor is: starting the vacuum system, vacuuming the reactor to remove oxygen and other impurities therein; after vacuuming, filling the reactor with inert gas nitrogen to maintain an inert atmosphere in the reactor to prevent oxygen from re-entering; S3, using the adaptive simulated annealing model to set the ratio of the raw materials, and stirring to ensure uniform mixing; the ratio of vinyl chloride to vinyl acetate is 90:11; S4, raising the temperature of the reactor to 60°C and 70°C, and the pressure to 1MPa-3MPa; after the temperature of the reaction system reaches the set temperature, adding the initiator, the initiator accelerates the copolymerization reaction, so that the molecular chains of vinyl chloride and vinyl acetate are connected to form a copolymer; the chemical product synthesized by the vinyl chloride-vinyl acetate copolymer is unbalanced as shown below: S5. Under constant temperature stirring, the reaction continues. When the pressure of the reactor drops to 0.2MPa~0.25MPa, it means that the reaction is nearly completed. S6. After the reaction is completed, the obtained slurry needs to be subjected to steam stripping treatment and centrifuge dehydration to remove the solvent and unreacted monomers. The dehydrated material is sent to an airflow drying tower by a screw conveyor for drying. The dried material is captured by a cyclone separator and sieved by a vibrating screen to obtain vinyl chloride-vinyl acetate copolymer particles. When the ratio of vinyl chloride to vinyl acetate is 90:11, the test results of vinyl chloride-vinyl acetate copolymer are shown in Table 1.

[0018] The experimental procedure was as described above.

[0019] The experimental hardware of vinyl chloride-vinyl acetate (VC-VAc) copolymer uses a reactor, a container for copolymerization, usually made of stainless steel to resist corrosion and high temperature. The capacity varies according to the scale of the experiment. A stirring system is used to mix the monomers and initiators to ensure that the copolymerization reaction proceeds evenly. A heating / cooling system controls the temperature in the reactor through external heating or cooling equipment to ensure that the reaction proceeds at an appropriate temperature. An initiator and terminator supply system accurately measures and supplies initiators (such as persulfate) and terminators (such as sulfur). Analytical instruments, Fourier transform infrared spectroscopy (FTIR): used to analyze the molecular structure and composition of the copolymer. The above hardware conditions ensure the smooth progress of the vinyl chloride-vinyl acetate copolymer experiment, and at the same time ensure the accuracy and reliability of the test results. After 3 hours of testing, the test results of vinyl chloride-vinyl acetate copolymer are shown in Table 1. It can be seen from Table 1 that when the temperature of the reactor rises, the reaction product rate of vinyl chloride-vinyl acetate copolymer and the vinyl record production rate are significantly improved.

[0020] Example 2 The preparation process of the vinyl chloride-vinyl acetate copolymer is: S1. Prepare raw materials, vinyl chloride, vinyl acetate, initiator, dispersant, chain linker and terminator; the initiator is an azo compound, the dispersant is polyvinyl alcohol, the chain linker is mercaptan, and the terminator is hydrogen peroxide; S2, vacuuming and deoxygenating the reactor to remove oxygen and other impurities therein; the temperature of the reactor is set above 50°C, the pressure is maintained above 1MPa, and the oxygen content is 0; the working process of the reactor is: starting the vacuum system, vacuuming the reactor to remove oxygen and other impurities therein; after vacuuming, filling the reactor with inert gas nitrogen to maintain an inert atmosphere in the reactor to prevent oxygen from re-entering; S3, using the adaptive simulated annealing model to set the ratio of raw materials, and stirring to ensure uniform mixing; the ratio of vinyl chloride to vinyl acetate is 89:17; S4, raising the temperature of the reactor to 60°C and 70°C, and the pressure to 1MPa-3MPa; after the temperature of the reaction system reaches the set temperature, adding the initiator, the initiator accelerates the copolymerization reaction, so that the molecular chains of vinyl chloride and vinyl acetate are connected to form a copolymer; the chemical product synthesized by the vinyl chloride-vinyl acetate copolymer is unbalanced as shown below: ; S5, under constant temperature stirring, the reaction continues, when the pressure of the reactor drops to 0.2MPa~0.25MPa, it means that the reaction is nearly completed; S6. After the reaction is completed, the obtained slurry needs to be subjected to steam stripping treatment and centrifuge dehydration to remove the solvent and unreacted monomers. The dehydrated material is sent to an airflow drying tower by a screw conveyor for drying. The dried material is captured by a cyclone separator and sieved by a vibrating screen to obtain vinyl chloride-vinyl acetate copolymer particles. When the ratio of vinyl chloride to vinyl acetate is 89:17, the test results of vinyl chloride-vinyl acetate copolymer are shown in Table 2. Combining Table 1 and Table 2, it can be concluded that the reaction product rate and vinyl record production rate of vinyl chloride-vinyl acetate copolymer have been greatly improved, the processing difficulty has been reduced, and the fluidity of vinyl chloride-vinyl acetate copolymer has been enhanced at 70°C.

[0021] Example 3 The preparation process of the vinyl chloride-vinyl acetate copolymer is: S1. Prepare raw materials, vinyl chloride, vinyl acetate, initiator, dispersant, chain linker and terminator; the initiator is an azo compound, the dispersant is polyvinyl alcohol, the chain linker is mercaptan, and the terminator is hydrogen peroxide; S2, vacuuming and deoxygenating the reactor to remove oxygen and other impurities therein; the temperature of the reactor is set above 50°C, the pressure is maintained above 1MPa, and the oxygen content is 0; the working process of the reactor is: starting the vacuum system, vacuuming the reactor to remove oxygen and other impurities therein; after vacuuming, filling the reactor with inert gas nitrogen to maintain an inert atmosphere in the reactor to prevent oxygen from re-entering; S3, using the adaptive simulated annealing model to set the ratio of raw materials, and stirring to ensure uniform mixing; S4, raising the temperature of the reactor to 60°C and 70°C, and the pressure to 1MPa-3MPa; after the temperature of the reaction system reaches the set temperature, adding the initiator, the initiator accelerates the copolymerization reaction, so that the molecular chains of vinyl chloride and vinyl acetate are connected to form a copolymer; the chemical product synthesized by the vinyl chloride-vinyl acetate copolymer is unbalanced as shown below: S5. Under constant temperature stirring, the reaction continues. When the pressure of the reactor drops to 0.2MPa~0.25MPa, it means that the reaction is nearly completed. S6. After the reaction is completed, the obtained slurry needs to be stripped and centrifuged for dehydration to remove the solvent and unreacted monomers. The dehydrated material is sent to the airflow drying tower by a screw conveyor for drying. The dried material is captured by a cyclone separator and sieved by a vibrating screen to obtain vinyl chloride-vinyl acetate copolymer particles. The ratio of vinyl chloride and vinyl acetate is obtained by an adaptive simulated annealing model. The test results of vinyl chloride-vinyl acetate copolymer are shown in Table 3. Combining Table 1 and Table 2, it can be concluded that the reaction product rate of vinyl chloride-vinyl acetate copolymer and the generation rate of vinyl records have been greatly improved. It can be concluded that the generation rate of vinyl records can be greatly improved through the adaptive simulated annealing model.

[0022] Example 4 In the above embodiment, the toughening agent is polyamide, and the polyamide increases the flexibility of the vinyl chloride-vinyl acetate copolymer. When the proportion of the polyamide exceeds 3.4%, the hardness of the vinyl record is 45~60 Shore D, and when the proportion of the polyamide is less than 0.7%, the hardness of the vinyl record is 98~102 Shore D; the lubricant includes an internal lubricant and an external lubricant, the internal lubricant is calcium stearate, and the external lubricant is PE wax; the stabilizer is magnesium stearate.

[0023] In a specific embodiment, after the ratio of polyamide to magnesium stearate is adjusted by the adaptive simulated annealing model, the proportion of polyamide is 2.9%, the proportion of magnesium stearate is 2.1%, and the test results of the vinyl record are shown in Table 4, Group A is the test results after the ratio is adjusted by the adaptive simulated annealing model, and Group B is the test results after the ratio is not adjusted by the adaptive simulated annealing model. From the above table, we can see that by adjusting the material proportion through the adaptive simulated annealing model, the stability of the vinyl record has been greatly improved, the hardness has been reduced, and the vinyl record is not easy to break.

[0024] Embodiment 5 In the above embodiment, the adaptive simulated annealing model randomly walks in the search interval, and the Metropolis criterion is used to make the random walk gradually converge to the local optimal formula ratio; , the probability of transitioning from state 1 to state 2 is: After iteration and solution transformation, the relative optimal solution of the formula ratio combination optimization problem is obtained, the value of the temperature attenuation factor is reduced, and the Metropolis criterion is repeatedly executed. When the temperature attenuation factor approaches 0, the optimal formula ratio is finally obtained. In a specific embodiment, , the original probability of transitioning from state 1 to state 2 is: The Boltzmann constant k is introduced to calculate the probability of transition from one state to another. When k becomes larger, the temperature has a greater impact on the probability distribution; in practical applications, , to adjust the shape of the probability distribution; T controls the balance between exploration and utilization of the model during the search process. At the beginning of the algorithm, a higher initial temperature is set to conduct a wide search to find potential solutions with lower energy. As the algorithm proceeds, the temperature is gradually lowered, making the system more and more inclined to choose the currently known local optimal solution; , the greater the possibility of receiving a bad solution.

[0025] In the above embodiment, the working principle of the adaptive simulated annealing model is: Initializing parameters, wherein the parameters include at least an initial temperature, a temperature attenuation factor, the number of iterations at each temperature, and a termination condition; randomly generating a combination of formula proportions as an initial solution; Calculate the comprehensive performance index of the record according to the current raw material ratio, wherein the comprehensive performance index at least includes a sound quality score and a durability score, and use the comprehensive performance index as the objective function value; Based on the current solution, a new solution is generated by randomly adjusting the proportion of a certain raw material; the increment is calculated according to the Metropolis criterion , calculate the difference between the objective function of the new solution and the current solution, Then accept the new solution as the current solution, otherwise accept the new solution as the current solution with probability P; if the termination condition is met, output the current solution as the optimal solution, that is, the optimal number formula ratio, and end the program; The temperature attenuation factor gradually decreases until it reaches 0, and then jumps to (2). In a specific embodiment, the adaptive simulated annealing model not only introduces appropriate random factors in the search strategy, but also introduces the natural mechanism of the annealing process of the physical system. The introduction of the natural mechanism enables the simulated annealing algorithm to not only accept points that make the objective function value better, but also accept points that make the objective function value worse with a certain probability during the iteration process; the states that appear during the iteration process are randomly generated, and there is no requirement that the subsequent state must be better than the previous state. The acceptance probability gradually decreases as the temperature decreases; many traditional optimization algorithms are often deterministic, and the transfer from one search point to another search point has a certain transfer method and transfer relationship. This determinism may often make the search point far from the optimal point, thereby limiting the application scope of the algorithm; while the simulated annealing algorithm searches in a probabilistic manner, which increases the flexibility of the search process; an algorithm control parameter similar to the annealing temperature is introduced to divide the optimization process into several stages, and the selection criteria of the random state in each stage are determined. The acceptance function is given by the Metropolis criterion as a simple mathematical model.

[0026] In the above embodiment, the method for applying the vinyl record raw material particles comprises the following steps: Step 1: Use the adaptive simulated annealing model to mix the vinyl record raw material particles in proportion to solve the optimal proportion; the proportion of the vinyl chloride-vinyl acetate copolymer is 95.6%, the proportion of the chlorinated paraffin is 4.3%, the proportion of the toughening agent is 2.9%, the proportion of the lubricant is 1.6%, the proportion of the stabilizer is 2.0%, and the proportion of the calcium carbonate is 1.9%; dry and screen the vinyl record raw material particles; Step 2: The mixed raw materials are fed into an extruder, heated to a temperature of 150°C to 200°C, heated to a molten state, and extruded into a sheet or strip through a die at a pressure of 55MPa to 80MPa; Step 3: feeding the extruded sheet or strip into a tablet press and pressing it into the shape of a record through a mold; Step 4: The pressed record is cooled at a temperature of 10°C to 25°C to quickly set and maintain a stable shape; Step 5: Polish and paint the surface of the record to improve its appearance quality and protective performance, and conduct quality inspection on the produced record, including at least appearance inspection and sound quality test.

[0027] In a specific embodiment, after the proportions of various materials are adjusted by the adaptive simulated annealing model, the test results of the vinyl record are shown in Table 3, wherein Group A is the test results after the proportions are adjusted by the adaptive simulated annealing model, and Group B is the test results after the proportions are not adjusted by the adaptive simulated annealing model. It can be concluded from the above table that the hardness of the vinyl record has been greatly improved after the adaptive simulated annealing model, and the flexibility, wear resistance and sound quality have been greatly improved. In addition, the processing difficulty has been reduced and the production efficiency has been greatly improved.

[0028] Example 6 In the above embodiment, the drying method is to use a spray dryer or an airflow drying tower device for drying, expose the particles to a high-temperature airflow, evaporate the water through heat exchange, and achieve the purpose of drying. The drying temperature is set to 28°C~32°C, and the drying time is set to 30min~45min; the screening method is to use the vibrating screen to screen the particles, pass the particles through the screen, collect the particles that meet the specifications, and retain the particles with a diameter of 0.9mm~1.2mm.

[0029] In a specific embodiment, the effect of drying temperature on vinyl records is shown in Table 6. From the above table, it can be concluded that as the drying temperature increases, the hardness of the vinyl record also increases, and the optimal drying temperature is 30°C.

[0030] In the above embodiment, the extruder includes a bracket 1, a hopper 2, a motor 3, a screw 4, a screw 5, a barrel 6, a thrust bearing shaft 7 and a thermometer hole 8; the bracket 1 is located at the bottom of the extruder and is responsible for supporting and fixing the extruder; the hopper 2 is a container for storing the material to be extruded and is located at the top of the extruder; the motor 3 is responsible for driving the screw or extrusion mechanism to rotate and is located on the left side of the extruder; the screw 4 is located on the right side of the inside of the extruder and pushes the material from the hopper 2 into the barrel 6 by rotating, and The material is plasticized by shearing, friction and mixing inside the extruder; the screw 5 is a fastener that connects or fixes the various components of the extruder and is located on the left side of the extruder; the barrel 6 surrounds the screw rod 4 and forms a closed extrusion space, and the material is squeezed and rubbed by the screw rod 4 in the barrel 6, gradually plasticized and pushed forward; the thrust bearing shaft 7 is used to support the screw rod 4 and withstand the axial thrust generated by it during the extrusion process, and is located on the left side of the extruder; the thermometer hole 8 is used to display the temperature and is located on the right side of the extruder.

[0031] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these specific embodiments are only illustrative, and those skilled in the art may omit, replace, and change the details of the above methods and systems in various ways without departing from the principles and essence of the present invention. For example, merging the above method steps so as to perform substantially the same functions in substantially the same manner to achieve substantially the same results is within the scope of the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

Claims

1. A raw material particle formula for vinyl records, characterized in that: The granule formulation uses the following components: 80-120 parts of vinyl chloride-vinyl acetate copolymer, 2-5 parts of chlorinated paraffin, 1-3 parts of toughening agent, 0.5-2.5 parts of lubricant, 0.5-2.5 parts of stabilizer, 0.1-2 parts of calcium carbonate and 0.5-1.5 parts of pigment; The vinyl chloride-vinyl acetate copolymer optimizes the processing performance, physical and mechanical properties and chemical stability of the material by adjusting the monomer ratio through an adaptive simulated annealing model; the physical and mechanical properties include at least hardness, toughness and wear resistance; the adaptive simulated annealing model finds the global optimal or near-global optimal formula ratio by jumping out of the local optimal formula ratio, and dynamically adjusts the parameter temperature attenuation factor according to the feedback information in the search process; the adaptive simulated annealing model includes an initial solution generation module, a target evaluation module, a neighborhood solution generation module, an acceptance criterion module, a parameter update and adaptive adjustment module and a convergence termination module; the initial solution generation module The signal output end of the target evaluation module is connected to the signal input end of the neighborhood solution generation module, the signal output end of the neighborhood solution generation module is connected to the signal input end of the receiving criterion module, the signal output end of the receiving criterion module is connected to the signal input end of the parameter update and adaptive adjustment module, and the signal output end of the parameter update and adaptive adjustment module is connected to the signal input end of the convergence termination module; the adaptive simulated annealing model first performs a formula ratio search within the primary search range, and then narrows the search range to enter the secondary search range for search.

2. A vinyl record raw material particle formula according to claim 1, characterized in that: The preparation process of the vinyl chloride-vinyl acetate copolymer is: S1. Prepare raw materials, vinyl chloride, vinyl acetate, initiator, dispersant, chain linker and terminator; the initiator is an azo compound, the dispersant is polyvinyl alcohol, the chain linker is mercaptan, and the terminator is hydrogen peroxide; S2, vacuuming and deoxygenating the reactor to remove oxygen and other impurities therein; the temperature of the reactor is set above 50°C, the pressure is maintained above 1MPa, and the oxygen content is 0; the working process of the reactor is: starting the vacuum system, vacuuming the reactor to remove oxygen and other impurities therein; after vacuuming, filling the reactor with inert gas nitrogen to maintain an inert atmosphere in the reactor to prevent oxygen from re-entering; S3, using the adaptive simulated annealing model to set the ratio of raw materials, and stirring to ensure uniform mixing; The ratio of vinyl chloride to vinyl acetate is in the range of 83:17 to 91:11; when the ratio of vinyl chloride to vinyl acetate is 83:17, the hardness of the vinyl record is in the range of 70 to 85 Shore D, the flexibility is high flexibility, the fluidity of the vinyl chloride-vinyl acetate copolymer is high fluidity, and the processing difficulty is low processing difficulty; when the ratio of vinyl chloride to vinyl acetate is 91:11, the hardness of the vinyl record is in the range of 85 to 95 Shore D, the flexibility is medium flexibility, the fluidity of the vinyl chloride-vinyl acetate copolymer is medium fluidity, and the processing difficulty is medium processing difficulty; S4, raising the temperature of the reactor to 60°C-70°C and the pressure to 1MPa-3MPa; after the temperature of the reaction system reaches the set temperature, adding the initiator, the initiator accelerates the copolymerization reaction, so that the molecular chains of vinyl chloride and vinyl acetate are connected to form a copolymer; the chemical product synthesized by the vinyl chloride-vinyl acetate copolymer is unbalanced as shown below: S5. Under constant temperature stirring, the reaction continues. When the pressure of the reactor drops to 0.2MPa~0.25MPa, it means that the reaction is nearly completed. S6. After the reaction is completed, the obtained slurry needs to be subjected to steam stripping treatment and centrifuge dehydration to remove the solvent and unreacted monomers. The dehydrated material is sent to an air flow drying tower by a screw conveyor for drying. The dried material is captured by a cyclone separator and sieved by a vibrating screen to obtain vinyl chloride-vinyl acetate copolymer particles.

3. The raw material particle formula of a vinyl record according to claim 1, characterized in that: The toughening agent is polyamide, which increases the flexibility of the vinyl chloride-vinyl acetate copolymer. When the proportion of the polyamide exceeds 3.4%, the hardness of the vinyl record is 45~60 Shore D, and when the proportion of the polyamide is less than 0.7%, the hardness of the vinyl record is 98~102 Shore D; the lubricant includes an internal lubricant and an external lubricant, the internal lubricant is calcium stearate, and the external lubricant is PE wax; the stabilizer is magnesium stearate.

4. The raw material particle formula of a vinyl record according to claim 2, characterized in that: The adaptive simulated annealing model randomly walks in the search interval, and uses the Metropolis criterion to make the random walk gradually converge to the local optimal formula ratio; The probability of transitioning from state 1 to state 2 is: After iteration and solution transformation, the relative optimal solution of the formula ratio combination optimization problem is obtained, the value of the temperature attenuation factor is reduced, and the Metropolis criterion is repeatedly executed. When the temperature attenuation factor approaches 0, the optimal formula ratio is finally obtained.

5. The raw material particle formula of a vinyl record according to claim 4, characterized in that: The working principle of the adaptive simulated annealing model is: Initializing parameters, wherein the parameters include at least an initial temperature, a temperature attenuation factor, the number of iterations at each temperature, and a termination condition; randomly generating a combination of formula proportions as an initial solution; Calculate the comprehensive performance index of the record according to the current raw material ratio, the comprehensive performance index at least including the sound quality score and the durability score, and use the comprehensive performance index as the objective function value; Based on the current solution, a new solution is generated by randomly adjusting the proportion of a certain raw material; the increment is calculated according to the Metropolis criterion , calculate the difference between the objective function of the new solution and the current solution, Then accept the new solution as the current solution, otherwise accept the new solution as the current solution with probability P; If the termination condition is met, the current solution is output as the optimal solution, that is, the optimal formula ratio, and the program ends; The temperature attenuation factor gradually decreases until it reaches 0, and then jumps to (2).

6. A method for applying vinyl record raw material particles, characterized in that: The method of using the vinyl record raw material particle formula described in claims 1 to 5 comprises the following steps: Step 1: Use the adaptive simulated annealing model to mix the raw material particles of the vinyl record in proportion to solve the optimal proportion; the proportion of the vinyl chloride-vinyl acetate copolymer is in the range of 85.1% to 96.7%, the proportion of the chlorinated paraffin is in the range of 1.5% to 5.7%, the proportion of the toughening agent is in the range of 0.7% to 3.4%, the proportion of the lubricant is in the range of 0.4% to 2.9%, the proportion of the stabilizer is in the range of 0.4% to 2.9%, and the proportion of the calcium carbonate is in the range of 0.1% to 2.3%; dry and screen the raw material particles of the vinyl record; Step 2: The mixed raw materials are fed into an extruder, heated to a temperature of 150°C to 200°C, heated to a molten state, and extruded into a sheet or strip through a die at a pressure of 55MPa to 80MPa; Step 3: feeding the extruded sheet or strip into a tablet press and pressing it into the shape of a record through a mold; Step 4: The pressed record is cooled at a temperature of 10°C to 25°C to quickly set and maintain a stable shape; Step 5: Polish and paint the surface of the record to improve its appearance quality and protective performance, and conduct quality inspection on the produced record, including at least appearance inspection and sound quality test.

7. The method for applying vinyl record raw material particles according to claim 6, characterized in that: The drying method is to use a spray dryer or an airflow drying tower device for drying, expose the particles to a high-temperature airflow, evaporate the water through heat exchange, and achieve the purpose of drying. The drying temperature is set to 28°C~32°C, and the drying time is set to 30min~45min. The screening method is to use the vibrating screen to screen the particles, pass the particles through the screen, collect the particles that meet the specifications, and retain the particles with a particle diameter of 0.9mm~1.2mm.

8. The method for applying vinyl record raw material particles according to claim 6, characterized in that: The extruder comprises a bracket (1), a hopper (2), a motor (3), a screw (4), a screw (5), a barrel (6), a thrust bearing shaft (7) and a thermometer hole (8); the bracket (1) is located at the bottom of the extruder and is responsible for supporting and fixing the extruder; the hopper (2) is a container for storing materials to be extruded and is located at the top of the extruder; the motor (3) is responsible for driving the screw or extrusion mechanism to rotate and is located on the left side of the extruder; the screw (4) is located on the right side of the extruder and pushes the materials from the hopper (2) into the barrel (6) by rotating, and The material is plasticized in the barrel through shearing, friction and mixing. The screw (5) is a fastener that connects or fixes the various parts of the extruder and is located on the left side of the extruder. The barrel (6) surrounds the screw rod (4) and forms a closed extrusion space. The material is squeezed and rubbed by the screw rod (4) in the barrel (6), gradually plasticized and pushed forward. The thrust bearing shaft (7) is used to support the screw rod (4) and withstand the axial thrust generated by it during the extrusion process. It is located on the left side of the extruder. The thermometer hole (8) is used to display the temperature and is located on the right side of the extruder.

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