Instrument description:

This Mask combustion tester is to test the burning performance of the mask after the head mold with the mask is exposed to the flame at a certain linear speed.

Mask combustion tester operation method:

1.Plug in the power socket on the back cover of the mask flammability tester, turn on the power, turn the gas pressure reducing valve that comes with the machine counterclockwise to the gas bottle, open the gas bottle valve to connect to the gas source.

2. Close the front door of the combustion test box, and place the "power" switch in the "on" position, and the power indicator light is on.

3. First make the nose tip of the metal head mold downward, put the mask on the metal head mold, press the "head mold start" button, the head mold starts to rotate, when the nose tip of the head mold is just above the igniter, press "Smolder stop" button, stop the head mold, adjust the height of the igniter head (turn the igniter head clockwise to lower, turn the igniter head counterclockwise to raise) so that the distance between the tip of the igniter and the nose of the head mold is 20± 2mm;

4. Press the "Igniter Return" button to restore the burner to the ignition position.

5. Press the "head mold return" button to restore the head mold to the starting position. Press the "Zero" key, and the instrument will return to the initial state.

6. Keep pressing the "ignition" button, adjust the "pressure adjustment" knob on the panel (first pull it out slightly, and then rotate according to the indication of the end of the knob "+" direction to increase, "-" direction to decrease to adjust ), make the pointer of the pressure gauge on the top of the instrument box point to 20Kpa, and then press the knob to lock the pressure. (Adjusted at the factory)

7. At this time, the ignition resistance wire has turned red. After lighting the igniter, release the "ignition" button. When it is difficult to ignite, please adjust the "flame" adjustment button, the clockwise direction is to reduce the flow of combustible gas, and the counterclockwise direction is to increase the flow of combustible gas.

8. Open the front door of the Mask flame retardant tester, place the flame height gauge (height 40mm) directly in front of the flame by hand, turn the "flame adjustment" knob to adjust the flame height to 40mm±2mm, and remove the flame height gauge after the flame is stable. At this time, observe whether the “temperature display” on the panel of the instrument is stable at 800±50℃. If it is not enough, it can be adjusted by increasing the inlet pressure of the gas cylinder pressure reducing valve to stabilize the flame temperature at 800±50℃.

9. Press the "igniter start" button to move the igniter to the ignition position, press the "head mold start" button, the head mold starts to rotate, after the head mold is turned in place, the igniter stops gas and resets, "continue burning time" "Automatic timing; after the continuous burning, press the "continuous burning stop" button; if there is no continuous burning, directly press the "continuous burning stop" button, after the smoldering ends, press the "smoldering stop" button again, and record the continuous burning time And smoldering time.

10. Press the "head mold return" button to restore the head mold to the starting position, open the front door of the combustion test box to remove the sample, and the test ends.

11. Press the "Zero" button, the instrument will return to the initial state, and the next mask sample will be placed on the metal head mold. At this time, the next test can be carried out according to the steps 6-11. If the next test is not needed, please turn off the power, unplug the power plug, take out the residue container and clean up the burning residue.

12. If you want to test the flame retardancy of the mask tape, you must put the mask on the metal head mold, loosen the "head mold positioning screw", and rotate the head mold to make the mask tape down. Press the "head mold start" button, the head mold starts to rotate, when the head mold is just above the igniter, press the "smolder stop" button to stop the head mold, adjust the height of the igniter head to make the igniter top The distance from the lowest part of the head mold is 20±2mm;

13. Follow the steps 6-11 to test.

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