Taizhou Kaiji Plastic Mould Co.,ltd

High quality product, professional service, being the core supplier in laser industry!

Home > News > Content
Junction Box Mould Overuse
- Oct 09, 2017 -

In the electrical circuit of the rail vehicle, the electrical junction box is responsible for the control system of energy transmission and signal control and transmission of one of the important devices, Junction Box Mould the wire tube and the junction box connected to the wire inside the wire in the junction box together, The box of the junction box to protect the wire and the role of connecting wires, rail vehicles, the entire electrical line is relatively long, when the wire to the corner when the junction box will be used as a transitional use.

The operating environment of the rail transit vehicle is very different. Compared with the urban temperature rail, the electrical junction box of the high-speed EMU is affected by the temperature difference between day and night, the temperature difference of each region and the heat of the work, and its working temperature fluctuates greatly (-40-125 ℃), but also by the impact, vibration, rain and snow, hail, Junction Box Mould dust and other effects, which are on the electrical junction box quality and safety performance challenges. From the application requirements, the identification of the safety performance of the electrical wiring box for the rail vehicle needs to be considered from the following aspects: impact resistance, static load strength, insulation performance, toxicity, Combustion performance, which is toxic and flame retardant properties are often considered in combination, this parameter is to prevent the junction box products in the event of fire, the release of toxic and harmful gases, Junction Box Mould the safety of passengers to bring serious hurt.

At present, the electrical wiring box in the rail vehicle is made of aluminum or stainless steel. The carbon fiber material is paid more and more attention because of its prominent lightweight effect. The carbon fiber electrical junction box for rail vehicles can use carbon fiber prepreg as raw material , The use of vacuum pressure cans for molding, according to the enterprise similar products, Junction Box Mould experimental data we can see that the carbon fiber electrical junction box and the traditional metal material junction box compared to the advantages will be highlighted. Here on the company's similar products, for example, the rail vehicle carbon fiber electrical junction box to do a brief performance comparison and description.

Stainless steel as a commonly used body material, to low temperature, and have better impact resistance, as its rail vehicle with electrical junction box material, performance is relatively safe; Junction Box Mould aluminum alloy, low temperature impact resistance, but Welding quality requirements are higher, once the hanging foot weld is short, it is easy to appear, take the arc fusion defect. Carbon fiber electrical junction box in response to large temperature difference, the impact is superior to the former two, carbon fiber material thermal expansion coefficient is small, the thermal conductivity decreases with increasing temperature, resistance to cold, hot, high and low temperature changes in carbon fiber electrical The size of the junction box will not change. Junction Box Mould Its anti-fatigue strength is much higher than the stainless steel and aluminum junction box, this is because the metal material under the action of alternating stress, the fatigue limit is only 30% -40% of the static load, and carbon fiber and composite materials used in combination, The fiber and matrix composite can alleviate the crack propagation, Junction Box Mould and there is the possibility of redistribution of the internal force of the fiber. Therefore, the fatigue resistance limit of the carbon fiber composite material is about 70% -80% of the static load strength and significant deformation sign. Junction Box Mould In addition, the carbon fiber box acid resistance is good, the acid was inert, Junction Box Mould capable of concentrated hydrochloric acid, phosphoric acid, sulfuric acid and other erosion.