ANALYSIS OF AXIALLY PULSED CHARACTERISTIC OF SCREW FOR DYNAMIC PLASTICS INJECTION MOLDING MACHINES
Wang Quan~(1,2),Qu Jinping~2(1.Department of Electromechanical Engineering,ZhongKai University of Agriculture and Technology,Guangzhou 510225,China;2.The National Engineering Research Center of Novel Equipment for Polymer Processing,The Key Laboratory of Polymer Processing Engineering of Ministry of Education,South China University of Technology,Guangzhou 510640,China)
A novel self-made hydraulic vibrator used as the driving impetus of a motion mechanism to realize axial pulse of an injection screw is adopted.It makes melt,plasticating,injection and holding pressure corse go on in the state of vibrating periodically.The dynamic response,amplitude and frequency characteristic of the pulsed screw in the injection course are analyzed. This study shows that the amplitude of the pulsed injection is smaller than that of vibration source,but the vibration frequency keeps from varying.Analyzing the axially pulsed characteristic of the injection screw is helpful for engineers to design pulsed-pressure-induced injection molding machines.
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