Search

Nowadays, screw press technology is more advanced due to a demand by oil palm industry to produce high oil production for consumer daily activity. The objective is to analyze the single and twin worm screw press by comparing several designs to maximize their lifespan of the worm screw press. This study used visual inspection, model development and simulation of worm screw press by using SolidWorks and calculation of design properties. Simulating a single tapered shaft and uniform pitch worm screw press with static and dynamic simulation resulted in the total life span yield of 4085 hours and 3621 hours, respectively. Meanwhile, simulating twin tapered shaft and uniform pitch worm screw press with static and dynamic analysis yielded the total life span of 3262 hours and 1685 hours, respectively. The option for the tapered shaft of screw press or uniform pitch was to be able to lessen the maintenance cost and further lifespan of the screw press. [ABSTRACT FROM AUTHOR]

The development of this simulator helps industry and dentist researchers to seek for plaque removal on the tooth. However, in toothbrush industry or any manufacturing department there are a bulky and massive machine with high cost and more suitable in industrial-level applications. Thus, for specific dental research, it is essential to develop the brushing simulator with a single brushing station that are simple, easy to operate and with a reasonable cost. In this study, two-dimensional motion of a brushing simulator with a single brushing station is investigated. The brushing simulator developed has five motion which is horizontal-vertical motion, elliptical motion, circular motion, inclined to the right motion, and zig-zag vertically and horizontally motion. From the result that will be observed, what is the relationship between those three parameters which are pressure (proportional to force applied), speed, and time taken. When the pressure given by the force higher, the time taken to brushing is longer. Higher speed gives faster time in all motions as it can overcome all of surface resistance. [ABSTRACT FROM AUTHOR]