Dongguan heat sink is a device to heat the electronic components of the heat dissipation device, mostly made of aluminum alloy, brass or bronze plate, sheet, multi-chip, etc., such as the computer CPU CPU to use a considerable Large Dongguan heat sink, TV in the power pipe, tube, amplifier in the amplifier tube to use Dongguan heat sink.
Dongguan heat sink of the various types are:
First, the cutting heat sink: This is a new Dongguan heat sink. Process: The fins are machined with special tools so that the curved precision flakes are cut from the metal block. Since the fins and the metal blocks are the same material, there is no drawback to the fins or the folded fins. As the process technology to enhance, can also create high-density fins.
Second, the squeeze heat sink: squeeze the manufacturing method is by the material under high pressure forced into the mold hole in the formation of solid into a constant cross-section of the long section. Extruded is the most widely used in Dongguan heat sink manufacturing, can be produced by cross-cutting rectangular needle-shaped Dongguan heat sink, can produce jagged fins to increase the performance of 10 to 20%, but will reduce the squeeze Type of speed. Extrusion aspect ratio can be as high as 6, the use of special mold design can be up to 10 aspect ratio.
Third, the casting heat sink: the molten metal pressed into the metal mold to produce accurate size components. This technology can produce high-density needle-shaped Dongguan heat sink. The high cost of the fixture is the biggest cost of investment, but the cost of the low component for mass production can be replenished. The thermal conductivity of the cast fins is reduced by the penetration of the gas into the pores. The same time as
Four, then heat sink:
Then the fins will be fin assembled in the bottom of Dongguan heat sink, then the effect of Dongguan heat sink on the great impact, if improperly manufactured, will form a hot obstruction, the general use of thermal plastic or solder.
Fifth, folding heat sink:
The folded fins are folded into a fin array shape, and the folded metal sheet is welded to the bottom of the heat sink by solder and copper, resulting in additional thermal resistance on the interface. The increase in the number of steps in production makes the cost increase. And the manufacture of small pitch fins is also difficult. Due to increase the cooling area, so good heat dissipation. The same time as
Six, improved casting Dongguan heat sink:
This kind of manufacturing method is the extension of the traditional casting method, first of a relatively thin embossed fin array separated by interstitial material, and then fixture fixed, so that the bottom of the Dongguan heat sink fins will be fixed at the bottom of the fin, and the formation of Dongguan heat sink