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眼镜落球冲击试验机仪器介绍:用于太阳镜、安全眼镜、防护眼镜、眼镜镜片、运动眼镜等各类镜片的抗冲击测试。本机用于检测眼镜片耐冲击和锥击性能测试。
防尘眼镜在尘埃较多的环境下使用,一般镜片牢度要求不高,不管眼罩式还是平镜式,都采用一般平光玻璃镜片制作。而防冲击眼镜是用于防飞射出来的小颗粒穿击眼睛用,其镜片要求耐冲击,如车工、磨砂工、打石工都应戴防冲击眼镜,如果这些工人戴一般防尘眼镜,那么铁砂与碎石飞击眼镜时被击碎,眼睛就会受到更大损害。所以,眼镜抗冲击性能是安全眼镜性能的检测项目。
参考标准:EN1836:2005、EN166:2002、ANSIZ80:2004、QB2457:1999、AS2282.2:1992、AS/NZS1067、AS/NZS1337等等
测试要求:测试镜片,尤其是标示有抗冲击功能的镜片具有一定抗冲击能力,防止镜片因轻微的冲击而脱落或破裂,危害使用者的安全。
眼镜落球冲击试验机技术参数:
型号:FLR-Y05
钢管高度:1.27M
钢珠:16mm/16g,25.4mm/68g
人头模型:欧标人头
功能:可同时实现眼镜产品的落锥测试和落球测试
测试方法及标准:
1.按照EN1836和EN166的要求,如镜架表示有抗冲击功能,须先将样品预热至55摄氏度一个小时,再将样品冷却至零下5摄氏度一小时,然后在室温环境中将样品固定与人头模型上,从1.27米的高度将16mm/16g的圆形钢珠自由落下,冲击镜片。
2.中标和美标要求不需要预热和低温冷却,其他步骤与欧标相同。
测试后,观察样品的受损情况和程度,判断是否通过合格标准。
Drop Ball Test
1、PurposeThis test is intended to ensure that all protectors possess a minimum impact resistance.
2、ProcedureEach complete device tested shall be placed on the headform as it would be wo rn by the user.
For faceshields,an additional supporting block,approximay25.4mm(1.0in.)wide and curved to conform to the shape of the window,shall be provided as a support for the window at its lower end but not lower than the chin of the headform.
The alignment shall be such that when the ball is dropped,it is in line with either of the eyes of the headform.
A25.4mm diameter steel ball,weighting 68g shall be freely dropped from a height of 127cm onto the lens at a point in line with the eyes of the headform.
Four complete devices shall be tested for each lens material and coating,two on the left viewing area and two on the right viewing area.