Heat conducting composite material and injection molding process for combining same and LED metal shell

Abstract

The invention belongs to the technical field of heat conducting composite materials, and particularly relates to a heat conducting composite material and an injection molding process for combining the same and a light-emitting diode (LED) metal shell. The heat conducting composite material comprises the following raw materials in part by weight: 46 to 91 parts of polyhexamethylene adipamide, 5 to 25 parts of graphite, 2 to 10 parts of molybdenum disulfide, 0.5 to 2 parts of nano calcium carbonate, 2 to 15 parts of glass fiber, 0.5 to 5 parts of coupling agent, 1 to 2 parts of antioxidant and 0.5 to 2 parts of processing auxiliary agent. The heat conducting composite material has high heat conducting property and thermal physical and mechanical properties. The injection molding process for combining the heat conducting composite material and the LED metal shell comprises the following steps of: (a) raw material drying and granulation; (b) plasticizing; (c) injection molding and filling; (d) annealing treatment; and (e) humidifying treatment. The LED metal shell prepared by the injection molding process has the advantages of high heat dissipation efficiency and safe and reliable use.

Description

technical field [0001] The invention belongs to the technical field of heat-conducting composite materials, and in particular relates to a heat-conducting composite material and an injection molding process combining the heat-conducting composite material with an LED metal shell. Background technique [0002] At present, advocating "energy saving, emission reduction, and development of low-carbon economy" has become the main strategy of governments around the world to solve energy shortages and environmental pollution. LED light sources are characterized by low power consumption, high light efficiency, long life, no radiation, no pollution, and driving characteristics Good quality, fast response, and high shock resistance are gradually replacing traditional light sources such as incandescent lamps, fluorescent lamps, and energy-saving lamps and entering various fields including home lighting. [0003] However, during the working process of the LED, the waste heat of the elec...

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Problems solved by technology

[0003] However, during the working process of the LED, the waste heat of the electric heat flow cannot be effectively dissipated, which will generate high heat, which will directly affect the luminous efficiency, luminous flux maintenance rate, service life and use cost of the LED.

At present, the LED industry has long relied on metal conductors as the only heat dissipation medium for LEDs. Although metal conductors mainly made of aluminum alloy have relatively good thermal conductivity, there may be problems in the actual installation and use of LED lights due to the metal shell that can be touched by hands. Contact, leakage safety hazards, unsafe and reliable use, at the same time, the metal shell made of die-casting or lathing has the disadvantages of high scrap rate, low production efficiency, and small choice of plasticity and diversity in the production process.

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