Development And Research Of Multifunctional Planetary Mixer For Experiment

As the application of polymer materials becomes more and more extensive,the requirements for mixing are getting higher and higher when formulating formulas.Compared with ordinary mixing equipment,planetary mixers are more suitable for polymers due to their high efficiency and no working dead zone.The mixing of materials is an indispensable experimental equipment for research institutes,universities and factories,etc.,for the adjustment of polymer material formulations and scientific research.At present,domestic planetary mixers are large in size,single in function,expensive,poor in safety,and have no torque measurement function.Unable to meet the diversified research and development needs of polymer material products.However,the highly automated,high-level planetary mixer developed abroad is expensive.In view of the common problems of domestic planetary mixers,combined with the characteristics of the wide application of the combined torque rheometer produced by Harp,this article has developed a model that can be used with the host of the torque rheometer and has a high level of automation.,A multifunctional planetary mixer for experiments with a wide range of applications and high safety performance.The main research contents of this paper are as follows:（1）Analyze the mixing mechanism of the planetary mixer.Based on the powder mixing mechanism,mixing characteristics and uniformity,an evaluation method for the mixing performance of the planetary mixer is proposed,and the corresponding theoretical model is established;the factors affecting the mixing effect of the planetary mixer and the mixing energy consumption are analyzed.The overall structure design of the mixer provides a theoretical basis.（2）Develop an experimental prototype of the planetary mixer.The prototype is an actuator without independent drive,mainly composed of a planetary system,a lifting and turning system,a safety protection system,and a mixing container.After being combined with the torque rheometer host,it becomes a hybrid equipment with measurement and control functions,and has a high level of automation.,The safety performance is perfect and it is equipped with a variety of paddle blades,which has a wide range of applications and can meet different mixing requirements.（3）Apply ANSYS finite element simulation analysis software to simulate and analyze the key components and key technologies of the planetary mixer.First,in order to ensure the reliability of operation,the static simulation analysis of the key components of the mechanical interlocking device is carried out to guide the design and optimization of the key components;Modal analysis of the planetary gear train;finally,in order to ensure that the mixing blade and the inner wall of the mixing vessel do not interfere with each other,a thermal-mechanical coupling simulation analysis is performed on the inner wall of the mixing vessel,and the thermal deformation and temperature changes are analyzed through the simulation results to verify the structure The rationality of the design.（4）Use the experimental prototype to conduct mixed experiment research.First,through the mixing container temperature experiment,analyze the temperature difference law between the temperature displayed by the sensor and the temperature actually loaded by the mold temperature machine,and the actual temperature of the inner surface of the temperature measurement point can be corrected according to the law;secondly,the powder mixing experiment is used to verify the experiment The basic performance of the prototype for powder mixing,and the analysis of the best mixing conditions;finally,through the PVC paste experiment and the comparison experiment of the high-speed mixer to verify the various mixing functions of the experimental prototype.The multifunctional planetary mixer developed in this paper for use with the main engine of the torque rheometer has a wide range of practicability,high safety performance and automation level,and provides a higher level for the development of polymer material product formulations and scientific research.Cost-effective planetary mixing equipment.