Abstract:
A discharge valve (100) of a compressor is disclosed. The discharge vlave (100) contains a spring-loaded valve body (120). Valve body (120) is preferably made of nonferrous metal like aluminum or magnesium and is coated by a covering (110) of uniform thickness, the covering (110) beeing preferably made of plastic material like polyetheretherketone (PEEK) by insertion molding. By that way a wear resistant and light-weight discharge valve is produced.
Abstract:
An anodized magnesium piston including a head and skirt for an internal combustion engine. The piston includes a non-fiber-reinforced, magnesium-based alloy including up to 4.0 percent by weight rare earth metals. The piston further includes an external surface, at least a portion of which has a base layer of magnesium fluoride, magnesium oxofluoride, magnesium oxide or mixture thereof electrochemically anodized thereto.
Abstract:
A method for manufacturing a fibre reinforced ceramic material which comprises forming a preform (11) of ceramic fibres, placing the preform in a porous mould (12, 13) and applying a ceramic slip (14) to the preform in the mould. The slip material (14) is then caused to impregnate the preform (11) by applying a pressure differential thus forming an impregnated preform (15). This is then removed from the mould (12, 13), the slip liquid is driven off and the preform is heat treated. The ceramic fibres and the slip material may include alumina, kaowool, silicon carbide, silicon nitride and/or zirconia.
Abstract:
PURPOSE: A method for hot-forging an Al or Mg alloy scroll rotor using shape changes of a mold is provided to minimize the height variation of a lap portion and improve dimension precision by controlling the size, position, and number of vent holes to maintain a uniform flow of a material. CONSTITUTION: A method for hot-forging an Al or Mg alloy scroll rotor using shape changes of a mold(20) is as follows. If the thickness of the center portion of a lap forming portion(21) is greater than that of the edge portion, the thickness of the lap forming portion is continuously reduced within 10-90% from the center portion to the edge portion. If the thickness of the center portion of the lap forming portion is less than that of the edge portion, the thickness of the lap forming portion is continuously increased within 110-200% from the center portion to the edge portion. If the thickness of the center portion of the lap forming portion is equal to that of the edge portion, a thickness reduction portion or a thickness increasing portion is formed on one side of the lap forming portion. Therefore, a lap portion formed in a lap forming space has a uniform height.
Abstract:
PURPOSE: An engine cylinder block is provided to prevent the separation of insert liners from the cylinder block by connecting the lower sides of the insert liners with an additional partition. CONSTITUTION: An engine cylinder block comprises a partition(11) which is installed between insert liners(3) inserted respective bores(B) of the cylinder block(1). Specifically, the partition is arranged in thick parts(T1) inside the cylinder block and connects the lower outer sides of the insert liners with a gap.
Abstract:
A vane of an aerogenerator is provided to prevent the vane of the aerogenerator from being broken by forming a rim connecting all vanes. A vane of an aerogenerator comprises: a vane shaft; a plurality of vanes(1) adhering to the vane shaft in a radial shape; and a strong rim(2) formed in the end of the vane. The rim joins all vanes together. The rims provided corresponding to the number of the vanes are combined through welding with the vane or a screw. The vane and the rim are formed by a molding process into one body. The rim is made of magnesium.
Abstract:
PROBLEM TO BE SOLVED: To provide a compressive functional member which is light-weight and inexpensive and has a high mechanical strength and to provide a method for manufacturing the compressive functional member.SOLUTION: A method for manufacturing a compressive functional member includes: an alloy forming step of forming a casting magnesium alloy material (32) which comprises, in mass% relative to the total amount, 0.2-15% of aluminum, 0.3-10% of calcium, 0.05-1.5% of manganese and unavoidable impurities; a casting step of casting the casting magnesium alloy material to produce an extruding magnesium alloy material (34); an extruding step of subjecting the extruding magnesium alloy material to an extruding processing at a temperature ranging 250-500°C and an extrusion ratio ranging 3-30 to produce a forging magnesium material (36); and a forging step of forging the forging magnesium material to form a compressed functional member (8, 10, 30).