source:other news release time:2023-10-25 Hits: Popular:led screen wholesaler
Stamping electroplating injection molding cutting packaging
Lamp brackets are generally made of copper with silver plating, top, and side. High power brackets generally use copper with silver structure and plastic reflection cups. Copper plays a role in connecting circuits, reflecting, and welding, while plastic mainly plays a role in reflecting and providing an interface for bonding with glue. Among the many factors that affect the quality and stability of the LED, in addition to the design and properties of the stamping parts, white high-temperature plastic material is an important factor. The plastic material used for SMD brackets is mainly Solay's white PPA material, which is resistant to high-temperature welding, high reflection, good adhesion with silicone, and good long-term durability. High power brackets generally have a plastic reflector cup and rivet heat dissipation structure. The injection molding process is an important part of the LED production process. The injection molding process involves placing rolled metal supports into the injection molding machine using an automatic feeding and receiving device, and then injecting raw materials.
Regarding PPA: Chinese name is poly (p-phenylenediamine), a semi crystalline material with an HDT of about 300 degrees and a Tm of about 320 degrees. It is an aromatic high-temperature nylon, but its water absorption is much smaller than that of ordinary nylon. This is relatively important for LEDs and has an impact on long-term reliability. Moreover, the reliability, initial brightness, application, and yellowing resistance of PPA particles vary among different brands and manufacturers, The same material may sometimes differ due to technological issues.
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