Abstract:
A method for manufacturing a fan blade includes the steps of, firstly, providing a mold. Then a mixture of metal powder and adhesive material is injected into the mold to forming a green body of the blade. Next, the adhesive material is removed from the green body of the blade. Finally, the green body of the blade is sintered to form the fan blade. A fan with such blades is also provided.
Abstract:
An exemplary method for manufactured an impeller assembly of a cooling fan includes following steps: providing an impeller, the impeller comprising a plurality of blades and a hub, the blades formed on an outer periphery of the hub; testing a center of gravity of the impeller; providing a shaft and fixing one end of the shaft in the center of gravity of the impeller.
Abstract:
A method for manufacturing a bearing device includes steps: providing a hollow mold, then injecting a feedstock of powder and molten binder into the mold under pressure, thus forming a desired perform of a cylindrical body and a desired perform of a cover; separating the binder from the desired perform of the body and the desired perform of the cover; sintering the desired perform of the body and the desired perform of the cover, thereby forming the body and the cover; and mounting the cover on the body, thereby forming the bearing device.
Abstract:
An exemplary heat sink assembly includes a base plate for thermally contacting an electronic component and fins protruded from the base plate to dissipate heat transferred from the base plate by nature convection and thermal radiation. A heat conductive film is formed on an outer surface of the heat sink. A thermal radiation wavelength region of a far and middle infrared ray is located in a thermal radiation wavelength region of the heat conductive film.
Abstract:
A cooling fan includes a hub and an impeller. The hub includes a circular wall and an annular wall. The annular wall has a position end opposite to the circular wall. The impeller includes a blade ring and a plurality of blades integrally extending outwards from an outer circumferential surface of the blade ring. The blade ring receives the hub and has a first mounting end and a second mounting end opposite to the first mounting end. When the position end abuts the second mounting end of the blade ring, the blades extend aslant from the blade ring toward a counterclockwise direction relative to the circular wall. When the position end abuts the first mounting end of the blade ring, the blades extend aslant from the blade ring toward a clockwise direction relative to the circular wall.
Abstract:
A bearing device includes a cylindrical body. The body defines an axial hole for rotatably receiving a rotatable member therein. The body defines a guiding groove at a side wall thereof. The guiding groove has a bottom end communicating a bottom of the axial hole and a top end at the body. The body defines a bore in a middle portion thereof to communicate the axial hole and the top end of the guiding groove, whereby lubricant can flow in a loop in the body.
Abstract:
An exemplary heat sink includes a heat-conducting substrate and a heat-conducting film formed on an outer surface of the substrate. A heat resistance of the heat-conducting film is lower than that of the heat-conducting substrate. A heat conductivity coefficient of the heat-conducting film is higher than that of the heat-conducting film. The heat-conducting film is thinner than the heat-conducting substrate, and a thickness of the heat-conducting film is in a range from about 0.025 mm to about 0.05 mm.
Abstract:
An exemplary injection molding apparatus includes a first mold defining a passage therein, a second mold engaging with the first mold, working fluid received in the passage of the first mold, and a thermal conductive member engaged in the first mold and thermally interconnecting the first mold and the working fluid. The first mold and the second mold cooperatively define a molding chamber therebetween adapted to receive injected molten material therein. The thermal conductive member transfers heat from the first and second molds to the working fluid when the first and second molds are hotter than the working fluid, and transfers heat from the working fluid to the first and second molds when the working fluid is hotter than the first and second molds.
Abstract:
A method for manufacturing a casing of a heat pipe includes steps: providing a hollow mold; injecting a feedstock of powder and molten binder into the mold under pressure, thus forming a desired body of a first shell and a desired body of a second shell; separating the binder from the body of the first shell and the body of the second; sintering the body of the first shell and the body of the second shell, thereby forming the first shell and the second shell; and mounting the second shell on the first shell and sintering the first shell and the second shell together, thereby forming the casing of the heat pipe.