How to choose the terminal junction box correctly

Thursday, 27 September 2018

The main application areas of waterproof junction box products are on-site and open-air scenes with relatively harsh environments. From the perspective of product safety performance, the impact resistance, static load strength, insulation properties, …

The main application areas of waterproof junction box products are on-site and open-air scenes with relatively harsh environments. From the perspective of product safety performance, the impact resistance, static load strength, insulation properties, *non-toxic*, anti-aging properties, corrosion resistance and flame retardancy of the material should be considered. (Non-toxic performance has been widely concerned, mainly because if the waterproof junction box product does not release toxic and harmful gases when it is exposed to fire, it is usually caused by the inhalation of a large amount of toxic gases in the event of fire. most.
1.Structural design: The overall strength of the waterproof junction box should be considered, beautiful, easy to process, easy to install and recyclable. The waterproof junction box products produced by international mainstream manufacturers do not contain any metal fittings, which can simplify the recycling of products. process. However, most of the domestic manufacturers choose different materials, and the material has poor resistance to enthalpy. Generally, brass inserts are installed in the mounting sockets of the waterproof junction box to increase the installation strength, so that the material recovery process will Increase time and cost. If you use raw materials from high-performance indicators provided by regular manufacturers, you can solve such problems.
2. Wall thickness: Generally, when considering the overall cost of the product, the product should be as low as possible to meet the impact resistance and anti-deformation performance of the product. The international waterproof junction box is designed, ABS and PC. The wall thickness of the material product is generally between 2.5 and 3.5, the glass fiber reinforced polyester is generally between 5 and 6.5, and the wall thickness of the die-cast aluminum material product is generally between 2.5 and 6. The material wall thickness should be designed to meet the installation requirements of most components and accessories.
3. Selection of sealing rubber ring material: For waterproof junction box products, commonly used sealing rubber ring materials are: PUR, EPDM, neoprene, silicon. When choosing a sealing rubber ring, temperature range, tensile strength, expansion ratio, hardness, Density, compression ratio, chemical resistance.
4. Fix the screw material of the waterproof connection cover: The key component when the cover of the waterproof junction box is combined with the base is the bolt. The choice of bolt material is also very important. The commonly used material is PA (nylon) or PA alloy. Use stainless steel self-tapping screws.

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