Abstract
Effects of Supersonic Vibration Field on Flow Characteristics and Filling Behavior of Glass-fiber-enhanced Polybutylene Terephthalate Microstructural Injection Molding Melt
Highlights
With its good mechanical and electric properties, the modified glass-fiber-enhanced polybutylene terephthalate (PBT) is an ideal engineering material for manufacturing relay and other electrical components
Because the microstructure plastic part is small, as are the flow channel, the mold cavity, and the injection amount, some factors that could be neglected under routine conditions might have considerable effects on the flow behavior and flow characteristics of the melt when molding microstructure parts
After the pressure signal is measured by the pressure sensor, it is converted into a digital signal by an A/D converter, and the collected data is appropriately amplified by a signal amplifier
Summary
With its good mechanical and electric properties, the modified glass-fiber-enhanced polybutylene terephthalate (PBT) is an ideal engineering material for manufacturing relay and other electrical components. The effects of the supersonic vibration field on the flow behavior of glass-fiber-enhanced PBT microstructural injection melt were studied and analyzed using the Cross-Williams– Landel–Ferry (WLF) model as the basis in this study. We fit and modified the viscosity model of the flow behavior of the macromelt by monitoring and controlling the microstructural injection molding flow conditions, such as melt temperature, relative molecular mass, shearing rate, and cavity pressure curve. The high-frequency vibration of a supersonic wave squeezes and releases the polymer melt continuously and reduces the interaction between molecules such that the plastification of polymer materials becomes more thorough and the flow properties of the polymer melt can be improved In this manner, the mathematical model of the flow of the supersonic-assisted polymer melt in a microflow channel could be established and the problem of uneven filling in injection molding could be solved
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