Needle flame test machine experimental operation
The flame test machine uses a needle burner of a specified size (0.9mm) to pass a specific gas (butane) to burn the sample at a 45° angle in a timely and directional manner, and observe whether the sample is ignited and the burning time and length to evaluate the small flame ignition hazard caused by the equipment's fault conditions.
As a modern technology enterprise integrating R&D, manufacturing, sales, training, and service, Shanghai Qianshi Precision Electromechanical Technology Co., Ltd. is committed to delivering more testing instruments to the market, providing testing instruments for textiles, leather, combustion, automotive interior and exterior trims, material environmental climate aging, etc., and can accept non-standard customization. Before purchase, targeted tests can be carried out according to customer requirements to ensure that the purchased instruments are suitable.
Experimental operation:
I. Test preparation:
1. Place the test samples, white pine boards, and paper in an atmospheric environment with a temperature of 15°C-35°C and a relative humidity of 45%~75% for 24 hours.
2. Check whether the equipment and instruments meet the test requirements of this project.
3. Before the test, prepare sample information (material composition, a sample structure diagram, etc.), sample ignition hazard analysis, and test records.
4. Fill in the prototype condition, prototype identification content, and relevant technical parameters in the test record.
II. Test steps:
1. Turn on the power switch of the combustion box and set the test time and observation time to 30 seconds.
2. Open the combustion test door. Turn the gas switch back to the "OFF" position and confirm that the gas cylinder button is in the "off" position. Due to the special safety design, if the gas switch is not adjusted to the "OFF" position, the gas cylinder will not be able to be installed in the furnace body.
3. When placing the gas cylinder, the notch of the gas cylinder valve must be upward. It must be noted that the notch of the gas cylinder valve is connected to the convex part of the joint of the gas pressure sensing safety device of the portable stove.
4. Press the gas button to the "SET" position. If the gas cylinder is not installed correctly, it will cause butane gas to leak and emit a "hissing" sound. When installing the gas cylinder, it must be checked clearly that there is no sound.
5. Press the flame adjustment button on the control panel, the equipment will open the solenoid valve and automatically ignite. If the burner does not catch fire, click the stop button immediately, adjust the gas flow meter appropriately, and press the flame adjustment button again. The accessories are equipped with a duckbill gauge, and other measuring tools (such as vernier calipers, etc.) can also be used. Adjust the gas flow meter again to stabilize the flame height at 12±1mm; the flame temperature increases from 100°C±5°C to 700°C±3°C, and the test time is 3.5±1.0 seconds.
6. Press the debug button, and the burner trolley will run to the right limit and stop, adjust the burner to make it 45° with the horizontal plane, and adjust the burner and the clamp so that the distance between the burner and the bottom of the sample is 8mm or the distance between the side is 5mm, turn the upward/downward self-reset switch to the left or right, and adjust the sample carrier on the right side with the sample clamped to the standard position.
7. Stick a layer of wallpaper on a smooth white pine board with a thickness of about 10mm, and place it 200±5mm below the position of the test sample that can add needle flame.
8. After the flame temperature is reached, start the test switch, observe the test sample, the parts around the test sample, and the bottom layer, and record the burning duration (t) from the moment the test flame is removed until the flame is extinguished, or until the test sample or the parts near it or the bottom layer used for the test no longer sees the burning phenomenon.
9. Press the reset button and the burner trolley will return to the initial position on the left.
III. Test results:
Evaluate according to the requirements of the product standard. If there is no requirement in the product standard, it is qualified if one of the following requirements is met:
1. The test sample does not produce flames and burning phenomena, the packaging wallpaper does not burn and the white pine board does not carbonize.
2. After the needle flame is removed, the flame or burning duration of the test sample, the surrounding parts, and the bottom layer is less than 30 seconds, the parts around the test sample and the bottom layer no longer continue to burn, the packaging wallpaper does not burn, and the white pine board does not carbonize.