Electric Enclosures Waterproof junction boxes (professional name: Electric Enclosures) are mainly divided into special and general purpose products. The main raw materials include: ABS engineering plastics, polycarbonate (PC), PC/ABS, glass fiber reinforced polyester, stainless steel.
1. Selection of materials: Waterproof junction box products are mainly used in the field of work and open air in relatively harsh environment.From the aspect of product safety performance should consider the impact resistance, static load strength, insulation performance, * non-toxic *, aging resistance, corrosion resistance, flame retardant performance of the material.(Non-toxic performance has been widely concerned, mainly because if the waterproof junction box in the case of fire, combustion will not release toxic and harmful gases, generally in the fire is often due to inhalation of a large number of toxic gases and death account for the majority.
2. Structural design: the waterproof junction box should be considered for its overall strength, appearance, easy processing, easy installation and recyclability.Waterproof junction boxes produced by international mainstream manufacturers do not contain any metal parts, which simplifies the product recycling process.However, most of the domestic manufacturers choose different materials with poor waxy resistance. Generally, brass inserts are installed in the socket of the waterproof junction box to increase the installation strength, which will increase the time and cost of the material recovery process.If you choose the raw materials with high performance indicators provided by regular manufacturers, this problem can be solved.
3. The wall thickness:Generally, when the overall cost of the product is considered in the design of the product, the wall thickness of the product should be reduced as far as possible to meet the impact resistance and waxy resistance of the product. In the design of the international waterproof junction box, the wall thickness of the ABS and PC materials is generally between 2.5 and 3.5, and the 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 shall be designed to meet the installation requirements of most components and accessories.
4. Selection of sealing apron materials: for waterproof junction box products, commonly used sealing apron materials include PUR, EPDM, Neoprene and SILICON.When choosing the sealing apron, the temperature range, tension resistance, expansion rate, hardness, density, compression rate and chemical resistance should be considered.
