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博文

目前显示的是 三月, 2018的博文

The Taber Abrasion Test Principle And Procedure

Strengthening control, the tests on the vamp material selected material with highwear resistance strength to the top of the shoe, shoe, such as easily damaged parts, in raising the overall durable performance and service life of shoes is of great significance. taber abrasion and wear tester and double-head taber abrasionand wear tester   have been recognized by more and more domestic and foreign customers because of its advantages such as simple operation, stable result and wide application range. Taber Abrasion tester Test principle Be placed on a rotating platform test samples, through the rotating platform as the above two rolling friction wheel, friction wheel under certain load and the specimen for rotating friction movement to wear. One friction wheel is outwards, and another friction wheel is in the inner friction sample. The abrasion marks are an overlapping ring. After the specified friction winding number, according to the surface wear condition and color change degre

Limit Oxygen Index Tester Test Procedure

The Limit oxygen index tester test requires the operator to calibrate the oxygen index meter before the test to ensure the accuracy of the test data. After calibration experiment, test requirement standard style for at least 15 root, respectively, in the style of any 50 mm at one end, insert the other end of the combustion on the tested style clip (the different forms, different thickness of the style, the test result is not). The initial oxygen concentration was determined prior to the oxygen index test. If you are not sure, you can ignite the sample in the air and watch the combustion. Oxygen combustion soon, if the sample of the initial concentration of 18%, selected if sample from fire immediately after lighting the flame in the air, depending on the ignition easily from fire after out of selecting oxygen concentration of 25% or more of the oxygen concentration. Determine the oxygen concentration and begin the formal test. First, open the oxygen and nitrogen cylinder va

Correct Use Of Color Assessment Cabinet

Observation Angle: The following points are all the facilities required for the Color Assessment Cabinet , and the viewing Angle will directly affect the evaluation results. According to international standards, there are only two observable angles that can be used. They are: A, zero light source and 45 degrees observation (0 °, 45 °), the light from zero (vertical) incident Angle on the sample, sample watchers from 45 degrees. B, light source and 45 ° inclined channel 45 degrees of light source, zero observation (0 °, 45 °), the layout must use specific 45 degrees of inclined (45 ° Fixed Angle table) making from 45 degrees of light source on the samples, sample watchers from zero (vertical). The location of the 45 ° light samples: Regardless of any of the above observation methods, it is important to note that the test sample is placed in the middle of the light box as far as possible to reduce the influence of the external light source. In addition, the most important thing

Comparative analysis of water-cooled and air-cooled xenon lamp aging tester

Xenon lamp aging test chamber is the core component of using the box full sunlight spectrum xenon lamp tube simulation, under different environmental conditions to simulate the material aging law, through the experimental results to evaluate weather resistance of materials and products. This paper focuses on the comparative analysis of the advantages and characteristics of the water-cooled and air-cooled xenon lamp aging testing machine. Air-cooled xenon lamp aging test machine : A circular wind is used to cool the heat-trapping xenon lamp tube. Air-cooled xenon lamp tubes used in air-cooled xenon lamp aging test box, generally a typhoon cold xenon lamp aging test chamber is equipped with three air-cooled xenon lamp tubes, and table 1 air-cooled xenon lamp weather-resistant chamber equipped with xenon lamp tubes. The power of the air-cooled xenon lamp tube is generally 1.8kw, and the length of the lamp tube is 340mm compared with that of the water-cooled xenon lamp. The diameter of