1, poor insulation
The function of the insulator is to keep the contact part in the correct position, and make the contact between the contact part and the complex part. Therefore, the insulation must have excellent electrical properties, mechanical properties and mechanical properties of the conveyor molding. Especially with the high density, the miniaturization of the wide use of terminals, the effective wall thickness of the insulator thinner and thinner. It puts forward more stringent requirements for the insulation material, injection mold precision and molding process. Due to the presence of metal particles, the insulator surface or inner surface of the dust pollution, flux moisture, organic material precipitates and harmful gas adsorption and membrane fusion to form water film on the surface of ion conductive channel, absorption of moisture, mildew, material aging insulation, can cause leakage, short circuit, low breakdown, poor insulation insulation resistance the phenomenon of.
2, fix bad
The insulator not only plays the role of insulation, but also provides accurate protection for the extended contact, and also has the function of positioning and fixing. Fixed bad, light impact on the reliability of the instantaneous power failure, serious is product disintegration. Refers to the disintegration of terminals in the state of inserted joint, because of the material, design, technology and other causes between the plug and the socket structure caused by unreliable, between pin and Jack abnormal separation control system will cause serious consequences to computerized wire stripping machine power transmission and control signal interruption. Because the design is not reliable, the material is wrong, the molding process is not appropriate, heat treatment, mold, assembly, welding and other process quality is poor, assembly is not in place, will lead to poor fixation.
3, bad contact
The metal conductor inside the terminal is the core part of the terminal, which transfers the voltage, current or signal from the external wire or cable to the corresponding contact part of the connector. Therefore, the contact must have a good structure, stable and reliable contact retention and good electrical conductivity. Because the contact structure is not reasonable, the mold material selection errors, unstable machining dimension tolerance, surface roughness, heat treatment, electroplating and other surface treatment process is not reasonable, improper assembly, storage and operation environment of improper use will be in the contact portions of the contacts and the matched parts caused by poor contact.