There are many kinds of LED light radiators, and these types are commonly used: die-casting aluminum radiators, extruded aluminum radiators (that is, aluminum profile radiators), stamped aluminum radiators, plastic-clad aluminum radiators, and high thermal conductivity plastic radiators. Each type of radiator has its own characteristics and characteristics, which will be introduced to you one by one below.
1. Die-casting aluminum radiator
Die-casting aluminum radiators are generally larger in size, more special-shaped in design, and controllable in production costs. The commonly used die-casting materials for LED lamp heat sinks are ADC10 and ADC12.
2. Extruded aluminum radiator
Extruded aluminum radiator (aluminum profile radiator) is a radiator that extrudes liquid aluminum through a fixed die, and then cuts the bar into the required shape by machining, and the post-processing cost is high. The cooling fins can be made very thin, and the heat dissipation area is expanded to the greatest extent. When the cooling fins work, air convection is automatically formed to diffuse heat, and the heat dissipation effect is better. Commonly used materials are AL6061 and AL6063.
Three, stamping aluminum radiator
The stamped aluminum radiator (usually by cold forging) is to punch and lift the steel and aluminum alloy plates through a punch and a die to make it a cup-shaped radiator. The inner and outer periphery of the stamped radiator is smooth and has no wings. And the heat dissipation area is limited. Commonly used aluminum alloy materials are 5052, 6061, and 6063. The quality of stamping parts is small and the material utilization rate is high, which is a low-cost solution.
The heat conduction of aluminum alloy radiator is ideal, and it is more suitable for isolated switching constant current power supply. For non-isolated switching constant-current power supplies, it is necessary to isolate AC and DC, high-voltage and low-voltage power supplies through the structural design of the lamps in order to pass CE or UL certification, and the aluminum alloy radiator meets this requirement.
4. Plastic-coated aluminum radiator
The plastic-clad aluminum radiator is a heat-conducting plastic-shell aluminum-core radiator. The thermally conductive plastic and the aluminum heat dissipation core are formed on the injection molding machine at one time, and the aluminum heat dissipation core is used as an embedded part and needs to be machined in advance. The heat of the LED lamp bead is quickly transferred to the thermally conductive plastic through the aluminum heat dissipation core, and the thermally conductive plastic uses its multi-wings to form air convection heat dissipation, and uses its surface to radiate part of the heat.
The plastic-coated aluminum radiator generally uses the original colors of thermally conductive plastics, white and black, and the black plastic plastic-coated aluminum radiator has a better radiation heat dissipation effect. Thermally conductive plastic is a thermoplastic material. The fluidity, density, toughness and strength of the material are easy to be injection molded. It has good resistance to cold and thermal shock cycles and excellent insulation properties. The emissivity of thermally conductive plastics is better than that of ordinary metal materials. The density of thermally conductive plastic is 40% smaller than that of die-cast aluminum and ceramics, and the weight of plastic-coated aluminum can be reduced by nearly 1/3 for the same shape of radiator; compared with all-aluminum radiators, the processing cost is low, the processing cycle is short, and the processing temperature is low; the finished product It is not easy to break; the injection molding machine provided by the customer can carry out the differentiated shape design and production of lamps. The plastic-clad aluminum radiator has good insulation performance and is easy to pass security inspection.
There is also a type of LED radiator called high thermal conductivity plastic radiator, which will be introduced in detail in future articles, please pay attention.
Post time: Aug-26-2022