Modular Design And Research Of Polyurethane Foaming Equipment

With the growing customer demand for personalized foaming machines,companies need to produce diversified products while shortening product design and manufacturing cycles and reducing production costs.Applying the modular design method to the modular design and research of polyurethane foaming machines can solve the problems faced by enterprises such as rapid response to the individualized needs of customers.In this paper,the modular design method is used to divide the polyurethane foaming machine modules,the theoretical design of the key modules such as the hybrid module and the mainframe,and the establishment of the model library to achieve the rapid response of the foaming machine design needs,using a combination of theory,simulation and experiment The method of studying the factors that affect the quality of foaming,improve the performance of the foaming machine and the quality of products.(1)The modular design method is used to classify the foaming equipment,analyze the common mechanical equipment module division method,use the function-structure-process division model to divide the foaming machine system into multi-level modules,and analyze the polyurethane foaming machine For the correlation between parts,an improved genetic algorithm is used to solve the module division scheme,and the relevant algorithm program is designed through MATLAB software,and the module division scheme of the polyurethane foaming machine is obtained through iterative calculation of the program.(2)Through the theoretical analysis of the mixing mechanism of the foaming machine,the internal symmetrical inlet mixing structure of the mixing chamber is obtained.It is proposed that the polyurethane high-pressure foaming machine uses high-speed impact to mix the materials.The theoretical calculation of the mixing chamber and the Fluent simulation The mixing pressure of materials and the velocity of the mixing flow field are analyzed to determine the optimal design parameters such as the diameter of the mixing chamber of 10 mm and the diameter of the feed port of 1.5 mm,and the structural design of key modules such as mixing and mainframe.(3)Through the static analysis of the mixing module through finite element simulation,the maximum deformation of the mixing blade is 0.029mm,and the maximum equivalent stress is 4.85MPa.At the same time,the finite element simulation of the mainframe module was carried out to obtain the natural frequency and vibration mode of the mainframe.It was determined that the foaming machine would not resonate under the normal working environment,and the harmonic response analysis of the mainframe was carried out.75Hz is relatively sensitive to external forces,and this frequency should be avoided to ensure the safe operation of the machine.Through SolidWorks,complete the modular modeling of parts and components,and establish a model library to assemble each module of the foaming machine.(4)Test the technical parameters such as the working pressure,material flow rate and mixing head injection flow rate of the foaming test machine with modular design.The tensile strength,elongation at break,compressive strength and other mechanical properties of products produced by different parameters of the foaming machine were collected through a tensile and compression testing machine.The compression strength index was increased by 3.43%compared to ordinary foaming machines.The growth rate increased by 5.54%and 5.73%respectively.the diameter of the feed port and the mixing effect is analyzed through experiments.The design parameters calculated by theoretical analysis are consistent with the experimental results,which significantly improves the overall performance and product quality of the foaming machine.Establish a multi-level module division mathematical model of function-structure-process,and use the improved genetic algorithm to quickly obtain the module division scheme of polyurethane foaming machine.Optimize the design of key modules such as mixing,automatic mixing,mainframe,etc.,determine the double blade mixing structure of the automatic mixing module and the internal symmetrical feed inlet mixing structure of the mixing chamber,and determine the feed inlet diameter and mixing through theoretical analysis and experiments The design parameters such as chamber diameter are beneficial to improve the overall performance and product quality of the foaming machine.