Testing method of rigid tester for medical injection syringe (needle)

Syringe is a kind of common medical equipment, which is mainly used for injection or extraction of liquid medicine Syringes are often used in medicine The specifications of syringes are generally divided into normal wall, thin wall and ultra-thin wall The rigidity and sharpness of syringes directly affect the patient's pain The national standard for manufacturing stainless steel syringes for medical machinery (GB / t18457-2015) clearly specifies the rigidity of syringes for medical syringes, and the manufacturer must strictly implement it Medical syringe: a syringe testing instrument used to measure the deflection value of medical syringe, to measure the rigidity of normal wall, thin wall and ultra-thin wall syringe, so as to evaluate whether the medical syringe meets the rigidity requirements Testing instrument for rigidity of medical injection needle (needle) testing instrument for rigidity of medical injection needle: the specified bending force is applied to the injection needle sample through the instrument, and the rigidity value of the needle at the force application point is measured and recorded by the special sensor of rigidity tester Test procedure of rigid tester for medical injection syringe (needle): take a proper amount of the product separated from the glass syringe, and place the rigid tester to act vertically on the syringe downward through the force applied push rod up to 60N (accuracy: ± 0.1N) The lower end of the force application push rod is composed of a die with an angle of 60 ° and a cylindrical surface with a radius of curvature of 1 mm The width of the push rod is at least 5 mm Adjust the needle tube and the rigidity tester according to the following requirements: a) make the span corresponding to the specification of the needle tube to be tested; b) make the end surface of the force application push rod located at the center of the span; c) Keep the needle tube perpendicular to the two needle holders and the force applying push rod, and make the center line of the needle tube coincide with the center line of the needle holder ? test according to the specified span and load conditions: according to the specified force corresponding to the specification of the needle tube, apply the bending force to the needle tube downward through the force application push rod at the rate of LMM / min, measure and record the deflection of the needle tube at the force application point, to 0.01mm, and the max deflection shall meet the requirements of Table 1 Jinan Sanquan Zhongshi Experimental Instrument Co., Ltd has advanced testing technology, packaging testing equipment and professional laboratory, and is committed to providing customers with comprehensive packaging quality control solutions.