- 업종: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who operates pig machine to pour molten iron into molds to cast pig iron. Respnsibilities include:
* Starts conveyor that positions mold under spout of pig-machine ladle.
* Moves controls to tilt ladle, allowing molten iron to flow into mold.
* Observes filling operation to detect sticking of molten iron to inside of molds, and signals lime mixer tender to spray additional lime on walls of molds.
* Performs maintenance, such as relining iron runners, repairing pig machine chains, and replacing broken molds, using handtools, bars, and jib crane.
Industry:Professional careers
A professional who sets up and operates diecasting machine to cast parts, such as automobile trim, carburetor housings, and motor parts from nonferrous metals, such as zinc, aluminum, or magnesium. Respnsibilities include:
* Lifts specified die sections into machine, using chain fall or hoist.
* Bolts die section in position and adjusts stroke of ram, using handtools.
* Connects water hose to cooling system of die.
* Preheats die sections with torch or electric heater.
* Turns valves and sets dial to regulate flow of water circulating through die and to control speed of machine, based on size and structure of part being cast and type and temperature of metal being used.
* Blows metal fragments from die surfaces, using airhose, and brushes lubricant into die cavity and onto plunger.
* Hand ladles molten metal into chamber of machine when operating cold-chamber machine.
* Pushes button to close and lock dies and activate plunger that forces molten metal into die cavities.
* Removes casting after dies open automatically, using pliers or tongs.
* Inspects casting for defects.
* May inspect castings, using fixed gauges.
* May dip castings in water to cool them.
* May load metal ingots into melting furnace, and transfer molten metal to heated reservoir of diecasting machine, using hand ladle.
Industry:Professional careers
A professional who operates centrifugal casting machine to cast artillery barrels. Respnsibilities include:
* Grinds rough spots from inside of mold with grinding wheel mounted on end of long rod.
* Fills pits on inside surface of mold with refractory material.
* Fits refractory stoppers into ends of mold.
* Mounts pouring box, which serves as funnel for pouring melt from furnace into mold, on special frame at breech end of mold and fits spout of box through hole in stopper.
* Starts machine rotating at specified speed.
* Directs overhead crane operator in positioning portable furnace containing melt for pouring, and pushes electric controls to tilt furnace and pour melt into pouring box.
* Forces casting from mold, using hydraulic ram.
* Observes instruments and records data, such as temperature of mold before and after pouring and time required to complete pour.
* May operate machine from control board and be designated Casting-Machine-Control-Board Operator.
Industry:Professional careers
A professional who removes steel ingots from molds after casting, and prepares molds for additional castings. Respnsibilities include:
* Signals overhead crane operator to lift mold, and knocks out ingot, using handtools and sledge.
* Marks casting code on ingot with paint or chalk.
* Examines mold and supporting plates for dirt, cracks, or breaks, and removes dirt and metal particles, using scraper, wire brush, and airhose.
* Mixes mold wash according to formula, and coats mold, using spray gun; or signals overhead crane operator to dip mold in tar tank.
Industry:Professional careers
A professional who operates vacuum casting machine to produce molten metal and pour castings of high density. Respnsibilities include:
* Removes ceramic mold from preheat oven, using tongs, and places it on lift in lower air lock of machine.
* Closes and clamps air-lock door.
* Inserts premeasured metal charge into upper air lock.
* Starts pumps to create specified vacuum in air locks.
* Pulls levers that cause ram to push charge into melting pot in vacuum chamber.
* Turns on current and adjusts temperature controls of furnace.
* Determines when molten metal is ready to pour by observing color through glass-covered opening, or by measuring temperature of molten metal with pyrometer.
* Moves controls that cause lift to raise mold from lower air lock to vacuum chamber.
* Pulls lever that causes furnace to invert and pour molten metal into mold.
Industry:Professional careers
A professional who pours molten, nonferrous metals into solidifying ingots to compensate for shrinkage that occurs when ingots cool in their molds. Respnsibilities include:
* Dumps specified amount of metal and flux into pot of gas- or oil-fired furnace.
* Reads temperature indicators and adjusts furnace flame to melt heading metal.
* Adds metal to molds to compensate for shrinkage, using ladle.
* Stencils identifying characters on top of solidified ingots, using special hammer tool.
* Opens mold and removes ingot, using tongs.
Industry:Professional careers
A professional who controls pouring station in which aluminum and aluminum alloys are cast into ingots. Respnsibilities include:
* Regulates flow of molten metal from ladle or directly from melting furnace into trough feeding casting molds of casting unit.
* Regulates flow of metal from trough into molds by adjusting screw valves at bottom of trough.
* Controls cooling conditions of casting unit by maintaining constant level of metal in molds and regulating series of valves to spray water against molds to produce ingots of uniform crystalline structure.
* Signals overhead crane operator to remove ingots.
Industry:Professional careers
A professional who draws molten metal from cupola into ladles for pouring into molds to make castings. Respnsibilities include:
* Signals overhead crane operator or metal pourer to place ladle under cupola spout.
* Withdraws bott (clay plug) from taphole, using long iron rod, and allows molten metal to flow into ladle.
* Inserts new plug on end of rod when ladle is full.
* Molds clay plugs by hand and affixes them to rods.
Industry:Professional careers
A professional who taps refining furnaces or reduction pots by one of following methods to pour molten slag or nonferrous metal, such as copper or aluminum, into molds, crucibles, or ladles. Respnsibilities include:
* (1) Punches clay plug from taphole, using steel rod, to allow molten metal to flow into molds.
** Molds clay plugs and inserts them into taphole to stop flow of metal, using rod, or builds clay-retaining wall over taphole.
** Chips or burns away solidified slag and metal from taphole, using chisel-edged bar, oxygen lance, or by short-circuiting current from bus bar to taphole with steel rod.
* (2) Signals overhead crane operator to place pouring crucible near pot.
** Breaks hole in crust of electrolytic bath, using crowbar.
** Clamps siphon lid on crucible, and inserts other end of siphon into hole.
** Attaches airhose to siphon, and turns valve to siphon molten metal into crucible.
** Lowers anode into bath, using pulley to maintain its position beneath bath surface.
Industry:Professional careers
A professional who removes castings from molds by performing any combination of following duties. Respnsibilities include:
* Brushes and sprays empty molds with water and bone ash or clay to prevent castings from sticking to mold.
* Chips and removes surplus bone ash, using chipping hammer and vacuum hose.
* Turns valves to adjust water sprays to cool molds or to loosen and drop castings from inverted molds.
* Pries castings from molds, using bar.
* Attaches crane hooks to lugs and signals overhead crane operator to lift casting from mold.
* May mix water, bone ash, or clay to specified consistency for coating molds.
Industry:Professional careers
