3 ways and techniques of heat shrinkable tube heating

Release date：2021-08-11 author：admin Click:

Heat-shrinkable tubing, also called heat-shrinkable tubing, is an insulating tubing with high-temperature shrinkage, soft flame-retardant, insulation and anti-corrosion functions. It is widely used in the waterproof connection of electronic equipment and the sealing and fixing of the branch of the wire. How to heat the heat shrinkable tube? The following are several common heat shrink tube heating methods and techniques.

1. Lighter:

You must use a windproof lighter, which is the kind of lighter that can't see the flickering open flame and uses a high-speed flame to light cigarettes. Use the disposable one, adjust the fire to the minimum, and burn it directly. For the plastic film, stay away! The temperature of the lighter is not easy to control, the key is that in some places, the lighter is not reliable at all because of the angle problem.

2. Electric hot air gun, or electric hair dryer:

During the heating process, it should be heated in one direction from left to right or from right to left, or it can be heated from the middle to both ends, to avoid air staying in the heat shrinkable tube, and tightly wrap the cable after shrinking, not too close to the surface of the sleeve Or focus on heating in one place, otherwise it will produce uneven thickness or burn the casing.

3. Heat shrinkable tube heating machine:

With the advancement of the internationalization of enterprises, the processing requirements of wire harnesses are getting higher and higher, that is, energy saving, high efficiency, and less labor are required, and the processing quality of heat shrinkable tubing is required to have good consistency and good air tightness. In this environment, a new product-heat shrinkable tube heating machine was born. The Dezheng intelligent heat shrinkable tube heating machine does not require manual operation. Compared with traditional manual work, at least 2-4 people can be saved.

Matters needing attention: (mainly for lighters and hot air guns)

1. The heat shrinkable tube and the heating equipment should not be too close. Pay attention to the distance between the fire and the heat shrinkable tube, that is, move evenly by 4~5cm. When heating and shrinking, do not exceed the temperature resistance upper limit of the heat shrinkable tube. For the heat shrinkable tube , If the temperature exceeds the upper limit of temperature resistance, our products will "melt" and return to the initial state.

2. Choose suitable heating tools. When heating and baking, the outer flame of the flame and the surface of the heat shrinkable tube are at a 45 degree angle. Be sure to move back and forth to heat the heat shrinkable tube as a whole, and heat slowly from one end to the other. It must be uniform, avoid bubbles, and ensure the shape of the heat shrinkable tube after shrinking, and trim it after cooling.

3. Heat shrinkable tubing has different heat shrinkage ratios. The size of heat shrinkable tubing generally refers to the product of the maximum allowable inner diameter of the casing after shrinkage and the shrinkage ratio. For example, the shrinkage ratio of the heat-shrinkable tube is 2:1, which means that you can choose a heat-shrinkable tube that is twice the diameter of your own product. For example, if the diameter of the quilt is 20mm, we can choose a heat shrinkable tube with a diameter of 40mm.

4. For linear objects such as wires, select heat shrinkable tubing specifications with the same size as the outer diameter of the product; busbar heat shrinkable tubing should be used for protection of power stations, electrical cabinets and other busbars; waterproof heat shrinkable should be selected for sealing requirements Tube.