Working principle of film falling dart impact tester

Film falling dart impact tester is also called film falling dart impact tester, falling dart impact tester, falling dart impact tester and falling dart impact tester Film falling dart impact tester is mainly used to test the impact strength of plastic film, so as to simulate the damage of packaging or agricultural film when it is impacted by external heavy objects It mainly tests the impact mass and energy of plastic film and thin film specimen with thickness less than 1mm when they are damaged According to gb9639-88 (test method for impact resistance of plastic film and sheet free falling dart method), this method includes two test methods: a method and B method Method a is suitable for materials with an impact damage mass of 50-2000 g; method B is suitable for materials with an impact damage mass of 300-2000 G Bmc-ab is one of the impact tester developed and manufactured by Jinan Sanquan Zhongshi Experimental Instrument Co., Ltd its working principle is: at the beginning of falling dart test, first select the test method, estimate an initial mass and △ m value, and carry out the test If the sample is damaged, use the weight △ m to reduce the falling mass; if the sample is not damaged, use the weight △ m to increase the falling mass in order to test In summary, the use of weights to reduce or increase the mass of the drop depends on whether the previous specimen is damaged After 20 samples are tested, calculate the total number of damages n if n is equal to 10, the test is completed; if n is less than 10, continue the test until n is equal to 10; if n is greater than 10, continue the test until the total number of undamaged samples is equal to 10, and then the system will automatically calculate the impact strength of dart By adjusting the weight of falling dart repeatedly, the critical mass of the film is found when it is impacted, and then the required energy of the impact sample is calculated The dart impact tester is equipped with a microcomputer controller, the whole calculation process is automatic, and equipped with professional computer software and printer, which is convenient for automatic storage and rapid printing It is an indispensable quality inspection instrument for plastic film production and use enterprises and quality inspection departments.