1. Material selection: the current waterproof junction box products are mainly applied in the field of relatively harsh environment and open field. In terms of product safety, impact resistance, static load strength, insulation, non-toxicity, anti-aging, corrosion resistance and flame retardant performance of materials should be considered. (Non-toxic performance has been widely concerned, mainly because if the waterproof junction box products in the case of fire, the burning will not release toxic and harmful gases, generally in the fire often due to the inhalation of a large number of toxic gases and death accounted for the majority).
2. Structural design: the overall strength, beauty, easy processing, easy installation and recycling of waterproof junction box should be considered. At present, the waterproof junction box products produced by international mainstream manufacturers do not contain any metal accessories, which can simplify the product recycling process. But now most domestic manufacturers choose different materials, materials with poor waxy resistance, generally in the waterproof junction box installation socket is equipped with brass inserts to increase the installation strength, which will increase the time and cost for the material recovery process. Such problems can be solved if raw materials with high performance indexes provided by regular manufacturers are selected.
3. Wall thickness: Generally, when designing the product, the overall cost of the product should be considered as far as possible to meet the impact resistance and waxiness resistance of the product, and the wall thickness of the product should be reduced as far as possible. When designing the waterproof junction box internationally, the wall thickness of ABS and PC materials is generally between 2.5 and 3.5, and that of glass fiber reinforced polyester is generally between 5 and 6.5. The wall thickness of die-cast aluminum products is generally between 2.5 and 6. The wall thickness of the material should meet the installation requirements of most components and accessories.
4. Selection of sealing rubber ring materials: For waterproof junction box products, commonly used sealing rubber ring materials are PUR, EPDM, Neoprene, Silicon. The selection of sealing rubber ring should consider the temperature range, tension resistance, expansion, hardness, density, compression rate, chemical resistance.
