プレス成型されたガラス製品のひげに対する熱的成型条件の影響 : ガラス内部の温度測定とひげ発生タイミングの測定

概要

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We presents an experimental study on effects of thermal conditions on the sink-mark generation of press-formed glass products. In experiments, the temperature of pressed glass was measured with variation of the initial temperature of the plunger and the pressing duration. The depth of the sink-mark was continuously investigated using laser displacement sensors. Obtained results are summarized as follows : (1) The temperature of the glass surface decreases dramatically during pressing. After pressing, it rises again because of reheating. However at the center of the glass, reheating is not observed. (2) The sink-mark grows up only when the temperature of the glass surface is above 700℃. In order to suppress the generation of the sink-mark, it is important to keep the temperature of the glass surface below 700℃ or to shorten the period during which it is above 700℃.
社団法人日本機械学会の論文
1996-08-25