Abstract
Abrasion of returnable bottles during transportation on conveyors in a bottling hall was investigated, using conveyors for experimental use. Using test bottles, the weight of which is ca. 605g, the experiments were carried out, by running them on these conveyors repeatedly at a certain speed, and the grade of abrasion on their outer surface was quantitatively investigated. At the same time, frequency analysis and sound pressure level of noise generated were also investigated from the accoustic standpoint. Finally, the relationship between abrasion grade, sound pressure level and running speed of bottles was investigated. The results obtained are summarized as follows:
(1) In the case of leight abrasion (scuffing), a linear relationship was obtained between running speed and the distance of transportation in logarithmical unit at a same abrasion grade level.
(2) In the cases of heavy abrasion (Herztian crack), the diameter of which is under 1.5mm, impact energy of lower limit was found to be ca. 0.3 Joule.
(3) A linear relationship was obtained between running speed and sound pressure level.
