As an intermediate link that connects the various functional components of the entire electronic system, cables are widely used in aerospace and electronic and electrical platforms. They are used in a variety of working environments, and the stability of their performance is very important. . Because as long as there is a solder joint with poor contact or poor welding, it will have an unpredictable impact on the entire system.

In order to be waterproof and dustproof, a layer of heat shrinkable sleeve is required to protect the electrical connector and the cable connection. The choice of heat shrinkable sleeve should be selected according to the size of the electrical connector tail and the outer diameter of the cable. The length should be selected from the electrical connector. After the outer screw sleeve of the connector reaches the part of the cable that can be retracted, the length of the retracted cable is generally about 2 times the outer diameter of the cable. For example, for a cable with a diameter of 6mm, the heat shrinkable sleeve should be able to shrink a cable with a diameter of about 10mm.

After all the core wires are welded, the spare wires are covered with heat-shrinkable sleeves. Tighten the tail cover, tighten the top wire, wrap several layers of insulation tape between the cable surface and the compression ring, lead the core wire shielding layer or inner shielding layer, and make a cold-rolled end at the end. Tighten one screw of the tightening ring, and then tighten the screws at both ends of the tightening ring to flatten the spring pad. After the tail cover is installed, it should be connected to the cable tightly without shaking. Shrink the heat shrinkable sleeve to the highest position that does not hinder the rotation of the outer screw sleeve, and the other section should wrap the cable at least not less than 2 times the diameter of the cable. If the diameter of the cable is too small, and the size of the tail of the electrical connector is large, and the cable cannot be shrunk after the tail is tightened, then a relatively thin heat shrinkable sleeve must be added to the upper heat shrinkable sleeve. The tail part is tightly combined with the cable. Finally, shrink the cable identification at a distance of 5mm from the end of the heat shrinkable sleeve or the tail of the electrical connector. When shrinking, make sure that the side of the cable identification is consistent with the position of the electrical connector No. 1, that is, on a horizontal plane. Moreover, it is best to use a heat gun to blow from the back of the label when shrinking, so that the font of the label will not shrink too much, resulting in unclear and difficult to recognize.

　　 The heat shrinkable tubing involved in this article is divided into two categories.

One type is used to protect the connection between the electrical connector and the cable. The inner wall of the heat-shrinkable tube with glue will melt after heating, and it will have a good waterproof effect after cooling. It has a certain degree of waterproofing. hardness.

　　 is a heat-shrinkable tube with no glue on the inner wall, which is softer after heat-shrinking. One of them is a braid-type package that can be printed with marks and used as an identification tube. One is a heat-shrinkable sleeve used to protect cable identification, and is often used to identify protective sleeves.

The use of heat shrinkable tubing should fully consider the size before and after heat shrinking, that is to say, when selecting, it must be slightly larger than the size of the wrapper before shrinking, and the size after shrinking must be less than the total outer diameter of the wrapper, so as to ensure heat shrinkage. The use effect of the sleeve.