In the daily wire harness application fields, such as automobiles, outdoor LED screens, agricultural machinery, construction machinery, etc., they are all used in rainwater environments, and the waterproof performance of the wire harness is very critical. Kable-x Electronics introduces the key control points of the waterproof wiring harness technology.

LED screen waterproof wire harness

1.     Choose a connector with waterproof performance

Choose advanced waterproof structure design connector, the waterproof level is greater than or equal to IPX7 protection level. Choose the connector produced by the distance manufacturer to ensure a strict quality control system, excellent processing and assembly accuracy, and multiple performance testing. In order to ensure the waterproof performance of the connector.

Waterproof connector

2.     Wire harness design process

The selection of wire diameter and the connector must match, and the wire diameter cannot be larger or smaller than the specified diameter of the connector

3.     In the production process

3.1. The waterproof terminal must be crimped with a special crimping mold, and the crimped terminal must meet the relevant technical requirements;

3.2. Heat shrinkage protection for solder joints and connection points: When the wire harness is welded, heat shrinkable tubing must be used for protection. The copper wire must not pierce the heat-shrinkable tube, and the heat-shrinkable tube must be completely wrapped with copper wire. Heat shrinkable tubing must meet relevant technical requirements;

4.  Air tightness test

       The sealing performance of the waterproof wiring harness is tested by an intelligent sealing detection system. The two ends of the wiring harness are connected to the corresponding tooling, compressed air is passed in, and the pressure test is performed to determine whether the sealing performance is qualified. The test standards are as follows:

        Detection pressure: 20KPa;

        Inflation time: 10S;

        Holding time: 5S;

        Test time: 10S;

        Pressure loss: ≤0.05 KPa

Air tightness test

In the specified time, the pressure loss is less than the specified value, indicating that the sealing performance is good. Meet the requirements of waterproof wiring harness. Product performance is qualified. KABLE-X has to conduct electrical performance testing, sealing performance testing, and appearance testing for every waterproof wiring harness. Ensure product quality is up to standard.