The terminal harness is a wiring part connected with each electrical equipment in the circuit. It is composed of insulation sheath, terminal block, wire and insulation wrapping material. The quality and service life of the terminal harness are closely related to the selection of the harness material. Therefore, when selecting the harness material, Be sure to be careful, from the source to the quality of the first off. Professional wire harness processing plant Dongguan country love electronic wire harness material selection unique twist study and years of experience, mainly affect the quality of wire harness factors usually include wire, terminal, plastic shell and production process.
First, the choice of wire According to the use of different environments, select the appropriate wire, such as: car engine ambient temperature is high, corrosive gases and liquids are also many, therefore, must use high temperature, oil, vibration, Automatic transmission of the wire must be high temperature, resistant to hydraulic oil, the temperature stability is better; weak signal sensors to use shielded wires, such as crankshaft position sensor and knock sensor, ABS wheel speed sensor; door to use bending resistance High wire and so on.
Second, the choice of plastic shell Plastic parts commonly used materials are PA6, PA66, ABS, PBT, pp, etc., design plug-in can be selected according to different needs of different materials, but also according to the actual situation in the plastic to add flame retardant or enhanced Materials to achieve enhanced or flame retardant purposes, such as adding glass fiber reinforced and the like.
Third, the material selection of the terminal material is mainly brass and bronze (brass hardness is slightly lower than the hardness of bronze), which accounted for a larger proportion of brass. In addition, according to different needs to choose a different coating, such as tin, gold and so on.
Fourth, the choice of other accessories Harness accessories play a wear, flame retardant, anti-corrosion, to prevent interference, reduce noise, beautify the appearance of the role, generally based on the working environment and space to select the auxiliary material. Accessories are usually the following:
1, tape - wire harness with PVC tape, acetate tape, insulation tape, conductive tape, copper foil, and so on. Tape in the wiring harness to play bundles, insulation, conductive, marking and so on. Different tape labels can be selected according to different requirements.
2, casing - casing type PVC pipe, glass tube, silicone tube, heat pipe, spiral, etc., play a flame retardant, insulation, protection and other functions. PVC pipe softness and resistance to bending deformation is better.
3, tin - tin in the amount of wire is also relatively large, tin and tin-free tin, silver tin, tin wire, etc., mainly for the end of the wire dip tin and welding. According to the use of different, to choose.
4, metal head class - metal head is mainly used for injection molding, metal head with DC head, BNC head, stereo head, DB head, USB head, DIN head, RCA head. Hardware head also need to choose according to the different use of model specifications and materials and coating.
5, rubber compounds - the same compound for injection molding, commonly used compounds are 45P, 60P, etc., the soft and hard different, according to the need to choose, there are different colors to choose to distinguish.
6, packaging materials - there are some other packaging materials, such as cable ties, the end of the band, PE bags, cartons, aprons, etc., but also in accordance with the packaging requirements to choose. Such as sent to foreign goods on the need to use double-layer carton to packaging.