Research Of Key Technologies Of Solid Food Aseptic Filling Equipment

The performance of aseptic filling equipment directly affects the quality of the packaged product. At present, there is a big gap between C hinese aseptic packaging machinery and foreign advanced technology in the design and manufacture. Therefore, it is particularly important to have a comprehensive study of the performance of aseptic filling equipment for increasing the independent innovation capacity and competitiveness of domestic aseptic filling equipment.In this paper, for the aseptic filling equipment, kinematic analysis and mechanism optimization were done for space absorbing package mechanism by using mathematical analytical method; motion characteristics of the pressure package institution was analyzed by using virtual prototyping technology; the cam profile was optimized; the dynamic characteristics of the heat sealing arm and the cam modal were also studied. The main research that has been done is as follows:1. Some study of space absorbing package mechanism was done. Based on space vector theory, kinematics mathematical model of space absorbing package mechanism was established by using the method of mathematical analysis, the corresponding motion curves were drew by using MATLAB. Research on influence of the length of the lever EF on the motion law of absorbing top was done. As can be seen from the analysis results, to a certain extent, the motion curve can be optimized by adjusting the length of the lever EF.2.The motion characteristics of the pressure package institution was analyzed and the cam profile is optimized. The result that the motion of pressure package top and the cam profile were in a one-to-one relationship was achieved through the analysis of the degree of freedom of pressure bag institution. Five times polynomial was used to plan the movement of pressure package top; based on reverse theory, the cam profile was achieved in ADAMS. The pressure angles of the cam profile under different combination of time were achieved. Analyze the radius in UG. At last, the optimum cam profile was chosen; the motion characteristics of the cam profiles in different time conditions were studied; the movement curves of the optimized cam profile were compared with that of the former cam profile. From the results, it can be concluded that the movement process of optimized cam profile is more smooth and precise.3.Detailed study on the dynamic performance of the swing arm was done. Taking the heat sealing roller and swing arm as the object, the dynamic performance of it was analyzed by the means of finite element method; the analysis results show that the joint of heat sealing swing arm and the pin shaft is weak and it is necessary to strengthen this part. Increase the width of the heat sealing swing arm, especially the joint of heat sealing swing arm and the pin shaft. At the same time, some material in the middle of the arm was removed without affecting the structure strength and the weight of the whole structure was reduced. The the strength of the improved structure meets the requirements and the whole structure is more lightweight, easy to install, transfer and maintain.4. The modal of the cam was studied. The free modal and constraint modal of the cam were analyzed by using finite element software ABAQUS. The frequency and modal vibration mode under the free condition and the constraint condition were obtained and evaluated in detail. The analysis is of important reference value for the structure in unknown external excitation condition.