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475 Processes

Andrew Gorman Inglés 36 fichas

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1Sand CastingLiquid metal poured into split sand mold
2Die CastingLiquid forced under pressure into metal mold
3Investment CastingWax pattern embedded in refractory, melted out, and cavity is filled with metal
4Low pressure castingDie is filled from below, giving control of atmosphere and of the flow of metal into the die
5Injection moldingGranular polymer (or filled polymer) is heated, compressed, and sheared by a screw feeder, forcing it into the mold cavity
6Blow moldingTubular blank of hot polymer or glass is expanded by gas pressure against the inner wall of a die
7Polymer extrusionShaped sections are formed by extrusion through a shaped die
8Thermo-formingSheet of thermoplastic is heated and deformed into a die by vacuum or gas pressure
9ForgingSlug of metal is shaped between two dies held in the jaws of a press
10RollingBillet or bar is reduced in section by compressive deformation between the rolls
11ExtrusionMetal is forced to flow through a die aperture to give a continuous prismatic shape. Can be hot (T > 0.85 Tm ) warm (0.55 Tm < T < 0.85 Tm ), or cold (T < 0.35 Tm ).
Hot work produces larger shape changes but gives poorer surface and tolerance (oxidation, warpage)
12SpinningSpinning disc of ductile metal is shaped over a pattern by repeated sweeps of the smooth, rounded tool
13Die pressing and sinteringPowder is compacted in a die, often with a binder, and the green compact is then fired to change the density
14Hot isostatic pressingPowder in a thin, shaped shell or preform is heated and compressed by an external gas pressure
15Powder injection moldingPowder and binder are forced into a die to give a green blank that is then fired
16Slip CastingWater-based powder slurry is poured into a porous plaster mold that absorbs the water, leaving a powder shell that is subsequently fired
17Filament windingFibers of glass, Kevlar, or carbon are wound onto a former and impregnated with a resin-hardener mix
18Roll and spray lay-upFiber reinforcement is laid up in a mold onto which the resin-hardener mix is rolled or sprayed
19Pressure bag moldingLaid-up fiber reinforcement, impregnated with resin-hardener mix, is compressed and heated to cause polymerization
20PultrusionFibers are fed through a resin bath into a heated die to form continuous prismatic section
21Deposition ModellingSolid body is created by the layer-by-layer deposition of polymer droplets
22StereolithographySolid shape is created layer by layer by laser-induced polymerization of a resin
23Direct mold modellingSand mold is built up layer by layer by selective spraying of a binder from a scanning print-head
24Laser metal depositionMetal powder is fed onto the part surfaces where it is selectively sintered by a laser beam
25Turning and MillingThe sharp, hardened tip of a tool cuts a chip from the work piece surface
26Plasma cuttingHigh-energy beam of ionized gas selectively melts a slot thorough a conducting workpiece
27Electric Discharge Machining____ between a graphite electrode and the work piece, submerged in a dielectric such as paraffin, erodes the work piece to the desired shape
28Water jet cuttingAn abrasive entrained in a high-speed water jet erodes the material in its path
29Adhesive bondingFilm of adhesive is applied to one surface, which is then pressed onto the mating one
30FasteningAchieved by bolting; riveting; stapling; push-through snap fastening; push-on snap fastening; or rod-to-sheet snap fastening
31Metal fusion arc weldingMetal is melted, and more is added from a filler rod to give a bond or coating
32Hot bar polymer weldingHeat is applied to the polymer components, which are simultaneously pressed together to form a bond
33Paint sprayingPigment in an organic- or water-based solvent is sprayed onto the surface to be decorated
34Polymer powder coatingLayer of thermoplastic is deposited on the surface by direct spraying in a gas flame, or by immersing the hot work piece in a bed of powder
35Silk screen printingInk is wiped onto the surface through a screen onto which a blocking pattern has been deposited, allowing ink to pass in selected areas only
36Pad printingInked pattern is picked up on a rubber pad and applied to the surface, which can be curved or irregular