CZZS-11 stone wear test machine hot selling - Database & Sql Blog Articles

Stone wear testing machine

YSD-11 type


one,

Stone wear testing machine

Scope of application:

This test machine is used to test the wear resistance of the pedal wear when using various stones as flooring or other similar applications. Its performance is in line with GB/T 19766-2005 standard.


two,

Stone wear testing machine

Test requirements:

There are four samples in each group. length. , width is 50m

m±0.5mm, thickness 15mm-55mm, the edge of the sample to be worn surface should be rounded to a radius of about 0.8mm.

When testing, the test piece shall be tested after being cooled to room temperature in a drier in an electric oven at a temperature of 105 °C ± 2 °C.


three,

Stone wear testing machine

experiment method:

1. The quality of the drying test is accurate to 0.02g, and then placed in the abrasion testing machine to meet the requirements of GB/T2479-1996. The particle size is 0.25mm white corundum as the abrasive. After grinding 225 rpm on the grinding disc, take out the sample. Brush the dust and weigh it to 0.02g.

2. Place the sample in water for 1 h, remove it and dry it with a damp cloth to weigh it. Calculate the bulk density according to the provisions of GB/T 9966.3-2001. Since the humidity affects the grinding effect, for example, the sample has a higher grinding rate when the humidity is high, it is recommended that the test be carried out at a relative humidity (30-40)%.


four,

Stone wear testing machine

Clean the surface after the test is completed

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Covered dust cover

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Stone wear test machine display map: Stone wear testing machine

Education Projector

Educational projectors are mainly aimed at classroom teaching by school teachers; traditional projectors are not easy to carry. Due to the naughty students in school classrooms, projectors are not safe to place in classrooms and are easily damaged by students. The portability of educational micro-projectors makes up for teaching Vacancy, it is convenient for teachers to give lectures and only need to store the materials in the projector and show them to students for teaching, saving the trouble of textbooks and handwriting with pens and chalks. Its general weight will not exceed 0.2Kg, and some do not even need fan cooling or ultra-small silent fan cooling.

Educational projectors need to have:

1. Clear handwriting Educational projectors most often display text and images, at least a resolution of 1024*768 or more, and a contrast ratio of more than 3000 lumens, so that students in the back row can see the projection clearly

2. Short-focus large screen;

3. Accurate color;

4. Easy operation;

5. Features such as multiple connection methods.

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