Development of Size Reduction System for Scrapped Glass Bottle and Manufacturing Method of Non-point Particle.

本研究的目的是为了建立经济的缩小系统，制造非点状玻璃颗粒和发展锐度（急性指数）仪器。在本研究中，使用了三种不同形状棒的管材磨和我自己的混合磨来减小尺寸。这台立式混炼机曾用于去除玻璃颗粒的边缘。现在人们了解到，当圆度（形状指数之一：豪斯纳表面指数的倒数）达到0.76左右时，这些颗粒就不会对我们的手造成伤害。另一方面，通过试验制成了一种测量锐度（锐度指数）的仪器。圆度和锐度之间的关系仍在研究中。通过对两种磨机的试验，得出如下结论。经双杯管磨破碎后的玻璃颗粒具有符合日本工业标准的粒度分布。颗粒形状也达到了不给人体带来危害的程度。磨耗对磨机的损害也小。通过混合磨粉碎，可以使颗粒的粒度分布比(1)、(5)更广泛地符合日本工业标准。混合磨制出的玻璃颗粒几乎不锋利。因此，即使我们紧紧抓住粒子，也感觉不到疼痛。本研究定义的圆度和锐度几乎是线性关系(7)。如果锐度在接近0.5以下，玻璃颗粒不会对人体造成危害。

The purposes of this study are for the establishment of economical size reduction systems, the manufacture of non-point glass particles and for the development of Sharpness (Acute Index) apparatus. In this study, a tube mill with three kinds of unique shaped rods as well as a mixing mill of my own work had been used for size reduction. This vertical mixing mill had been used for taking off the edges of glass particles. Now it is learned when the Circularity (one of the Shape Index : reciprocal of Hausner's Surface Index) becomes about 0.76 or so, these particles don't harm our hands, On the other hand an apparatus for measuring Sharpness (Acute Index) is made by way of trial. The relationships between Circularity and the Sharpness are still being studied.By the experiment by two kinds of the mill, got conclusions are as follows.(1).The glass particle by the binary cup tube mill crushing has the particle size distribution which suits the Japanese Industrial Standard.(2). The particle shape is also extent that does not give the human hazard.(3). The damage of the mill by the abrasion is also small.(4).BY mixing mill grinding, it possible to make the particle of the size distribution which widely suits the Japanese Industrial Standard more than the case of (1).(5).The glass particle made by the mixing mill is hardly the sharpness. Therefore the pain is not sensed, even if we take fast hold of the particles.(6). Circularity and Sharpness defined in this study is almost in the linear relationship.(7). The glass particle does not add the hazard to the human, if this Sharpness is under nearly 0.5.