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How to standardize the use of heat shrinkable tubes

2022-03-01
The heat shrinkable tube has good flame retardant, insulation and temperature resistance functions. It is made of a special polyolefin heat shrinkable tube. Many people call it EVA material. Let's take a closer look. How to standardize its use.
1. The choice of specifications
Generally speaking, the diameter is about 70%, which is about the same as the diameter of the protected component. For example, if you want to use the diameter of 20cm
If it is on the cylinder, then we have to choose those with a diameter of 29cm before heating. But one thing to note is that if the specification
If it is larger than 40cm, it is better to set the value to 60%.
2. Requirements for air insulation clear distance of busbar after use
For the specific value, we can refer to the process code in "Busbar Fabrication and Installation". If it is 2.35kV, after heat shrinking, we must pay attention to the distance of the air insulation at the tip to be greater than or equal to 220 mm. We must pay attention to this value. Note that it cannot be less than this value.
3. Some points for attention in the use of busbars and heat shrinkable tubes
1. When using it, it should be noted that the burrs and sharp corners on the busbar should be removed, otherwise it will easily cause it to pierce the heat shrinkable tube and cause cracking when heating and shrinking.
2. Before use, it should also be noted that the quick-drying cleaning agent should be used in advance to thoroughly clean the connected parts, and the heating can be performed after cleaning.
3. When cutting traditional Chinese medicine, ensure that the incision should be neat and smooth. It is best not to have any burrs or cracks. Otherwise, it is easy to cause uneven heating during heating and cause cracks to spread.
4. The choice of heating method is more diverse, we can use constant temperature oven, propane lamp, liquefied gas fire, gasoline blowtorch, etc.
5. If you use an industrial hair dryer for heating, you must pay attention to heating from one port first, and then evenly move it to the other port, so that it is evenly heated and shrunk.
If a heat gun is used to heat the heat shrinkable tube, the temperature should generally be controlled between 400°C and 600°C. At the same time, it is also necessary to pay attention to the distance between the fire and the heat shrinkable tube, that is, move 4 to 5cm evenly. , heating while moving, do not get too close to the surface, or only heat in one place.

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Insulation protection function and application scope of heat shrinkable tube

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Introduction of heat shrinkable tube
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