Flour from long-grain, high-amylose, milled rice was extruded in a double screw extruder.
These findings demonstrate that DEM is a valuable tool for the design and simulation of double screw mixing systems.
Computer-aided stamping analysis was performed on four screw-hole patterns in the ATTM plate — a control without screw-holes, square screw-holes, double screw-holes, and large-diameter, double screw-holes — using upper/lower dies of averaged ZMC reconstruction models.
In the field of gearing an application results in the design of pitch surfaces of a double screw gearing and especially of hypoid gears.
This study employs the discrete element method (DEM) to simulate particulate flow and investigate mixing performance of a lab-scale double screw mixer.
In a head-to-head biomechanical comparison, we tested single dorsal screw fixation versus double screw fixation, including both the dorsal and the axial loading screws in 10 metatarsal Sawbones® (Pacific Research Laboratories Inc ,Vashon, WA).
A factorial experimental design (FED), based on the screw speed and torque of the double screw extruder used, was done to get the best thermo-mechanical properties versus processing conditions.
The stamping analysis found that the double screw-holes design resulted in the most favorable performance among all the designs because of maximum von Mises stress (408 MPa) under the ultimate tensile strength.
The operating conditions were feed compositions (FC; food grade corn grit, feeding grade corn grit), screw threads (ST; single, double), screw pitches (SP; narrow (3.5 mm), intermediate (5.0 mm), wide (6.5 mm)), and screw speeds (SS; 50 rpm, 60 rpm, 70 rpm).
The metatarsals were analyzed on an Instron compression device for comparison; 100% of the single screw fixation osteotomies failed with compression at an average peak load of 205 N. Four of five axial loading double screw fixation osteotomies did not fail.
