Instead of using the air pressure, the new process uses a mechanical piston as the driving force for extrusion, which allows the control of the material outflow from the needle tip.
Microextrusion systems function by either pneumatic or mechanical (piston or screw) operational modules.
This shot is then driven into the die by a hydraulic or mechanical piston.
They are the mechanical-piston pump, the mechanical-air lift (rotodynamic) pump and the electrical pump.
Open image in new window Fig. 3 Flow diagram of pseudo-binary and ternary compositions mechanical compression of piston.
Open image in new window Fig. 2 Experimental isothermal pressure volume profile A gas injection; AB diffusion and solubility of advancing gas in liquid phase; BC equilibrium between thermodynamic phases; CD thermodynamic equilibrium broken by mechanical compression of piston.
The parametric analyses of the moving mass, spring stiffness, mechanical resistance, piston diameter, and working frequency of the mass-spring displacer are finally performed.
A linear generator is used to convert the mechanical work of the pistons into electricity during the expansion process.
The velocity of the piston was approximately 14 mm/s, calculated from a distance of the piston of 0.7 mm and a time of 0.05 seconds.
The piston of the dynamometer will be held perpendicular to the anterior surface of leg.
