High-speed Fracture Behaviour Of Glass Bottles
When Using Underwater Shockwaves
Author(s)
H. Sakamoto, S. Kawabe & S. Itoh
Abstract
The high-speed fracture process of glass bottles when using underwater
shockwaves and the glass bottle recycling technology that uses this crushing
technique are discussed. The proposed technique is an efficient method for the
smashing and washing of glass bottles. The production cost of producing cullet,
which is small glass fragments, can be decreased as a result. In this study, using
commercial beer bottles, the relationship between the cullet size and various
explosive conditions were clarified. Moreover, the behaviour of the underwater
shockwaves was observed by the framing photograph method, the shadowgraph
method and the illumination photography method, and the FEM simulation was
executed in order to clarify the high-speed fracture mechanism.
Keywords: glass-cullet, underwater shockwave, high-speed fracture.
1 Introduction
Bottles made of glass are used voluminously as containers for water, alcoholic
drinks and medicine. Many of these glass bottles are re-used as returnable bottles
or recycled as the raw material for other glass bottles, in which case it is called
‘cullet’, being the small crushed fragment of the glass. Recycling by
conventional methods in a large-scale crushing machine is expensive and
therefore the ratio of this production method becomes lower in comparison with
that of the recycling as returnable bottles. In the case of medicine bottles, almost
all of them are dumped as landfill dust [1].
In this study the authors paid attention to the recycling technique for crushing
the glass bottles by using an underwater shockwave [2–5]. When this technology
Keywords
glass-cullet, underwater shockwave, high-speed fracture.
Related Book
Other papers in this volume
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