- Industry: Government; Labor
- Number of terms: 77176
- Number of blossaries: 0
- Company Profile:
A professional who sets up and adjusts battery of automatic machines that compress powdered plastics into tablets used in molding plastic buttons. Respnsibilities include:
* Installs specified dies and punches onto machine holder plate according to tablet size specifications, using wrench.
* Adjusts stroke of punch according to tablet density specifications.
* Starts battery of automatic machines that compress powdered plastics into tablets.
* Breaks sample tablets between fingers to test hardness.
* Weighs sample lot of tablets to verify density.
* Adjusts machine controls to eliminate tablet defects.
Industry:Professional careers
A professional who sets up and operates injection-molding machines to cast products from thermoplastic materials. Respnsibilities include:
* Installs dies on machine, according to work order specifications, using clamps, bolts, and handtools.
* Sets machine controls, regulating molding temperature, volume of plastic, molding pressure and time, according to knowledge of plastics and molding procedures.
* Dumps premixed plastic powders or pellets into hopper, and starts machine.
* Pulls lever to close dies and inject plastic into dies to cast part.
* Removes finished product from dies, using handtools.
* Trims excess material from part, using knife.
* May mix thermoplastic materials and coloring pigments in mixing machine, according to formula.
* May grind scrap plastic into powder for reuse.
Industry:Professional careers
A professional who operates preexpander and continuous molding machine that expands and molds polystyrene beads under heat and pressure, forming bead board. Respnsibilities include:
* Reads work order to determine resin type and density requirements for bead board production.
* Shoves intake tube in resin and presses tube into coupling of venturi feed system.
* Presses buttons and turns valves to activate centrifuge, supply steam, and feed resin to expander.
* Fills volumetric can with beads and weighs beads to determine density, using balance scale.
* Compares bead density with production requirements.
* Reads steam pressure and temperature gauges and turns steam valve or rotates auger disk, adjusting heat and resin feed rate to control bead density.
* Connects hose of molder feed hopper to aging bin and pushes feed hopper into place to feed molding machine.
* Turns venturi feed valve, sending air through feeder to draw beads from hopper into molder.
* Starts molding machine.
* Guides bead board from molder through rollers of trimmer and saw to start board.
* Monitors gauges and observes operation of molding machine and equipment to ensure operation according to specifications.
* Inspects bead board for specified fusion and finish.
* Turns steam and air valves to adjust heat and bead feed rate to prevent machine overload and to correct flaws in bead board.
* Records lot number of resin, feed rate, and steam pressure, for various densities and board dimensions.
* Computes production in board feet to determine output.
Industry:Professional careers
A professional who tends machine that casts plastic containers. Respnsibilities include:
* Fills tubs with prescribed amounts of colored thermoplastic powder and zinc compound, using scoop and scale.
* Positions tubs containing mixture to facilitate loading of molds.
* Fills molds with specified amount of mixture, closes mold covers, and depresses toggle latches to lock covers in place.
* Presses buttons to start centrifugal-casting machine that automatically heats, spreads, hardens, and shapes mixture into plastic molds to form refuse containers.
* Pulls toggle latches to release mold covers and removes covers.
* Breaks seals that hold plastic containers in molds and removes containers from molds, using handtool.
* Wipes moisture from inside of molds, using cloth rag.
* Trims flashing (excess plastic) from containers, using utility knife.
Industry:Professional careers
A professional who molds imitation marble (scagliola) into objects, such as desk sets, penholders, sections of pillars, and interior decorative slabs. Respnsibilities include:
* Compounds materials in vat according to formula.
* Pours mixture into molds or on glass-flanged table.
* Dumps set pieces out of molds.
* Smooths objects with brick covered with moist emery, rottenstone, or other abrasive.
* Polishes parts with felt-covered brick.
* May use acetic acid solution to increase polishing quality of felt and add to luster of polished surface.
Industry:Professional careers
A professional who molds imitation marble (scagliola) into objects, such as desk sets, penholders, sections of pillars, and interior decorative slabs. Respnsibilities include:
* Compounds materials in vat according to formula.
* Pours mixture into molds or on glass-flanged table.
* Dumps set pieces out of molds.
* Smooths objects with brick covered with moist emery, rottenstone, or other abrasive.
* Polishes parts with felt-covered brick.
* May use acetic acid solution to increase polishing quality of felt and add to luster of polished surface.
Industry:Professional careers
A professional who operates hydraulic press, equipped with steam or electrically heated platens, to cast rubber or plastic matrices and rubber dies or types. Respnsibilities include:
* Turns dial to set electric thermostat or steam valves to maintain specified temperature in press.
* Inserts chase containing type into press to heat type to specified temperature, or inserts engraved metal plate into press.
* Places sheet of hard plastic or similar material on type and allows to heat for prescribed period of time.
* Pulls lever to impress material into type form to make matrix.
* Peels matrix from type, places rubber of plastic sheet on matrix and inserts it in press.
* Places metal strips (bearers) of specified thickness along sides of rubber or plastic and matrix to limit depth of pressing and determine thickness of die.
* Repeats heating and casting process to produce rubber die.
* Trims excess rubber from edges of designs, letters, symbols, and figures, using curved knife.
* May mix casting compound and water to puttylike consistency, spread compound on mold plate, invert casting plate over type, press compound into type and dry compound in oven.
* When making rubber dies or type, may be known as Vulcanizer, Rubber Plate.
Industry:Professional careers
A professional who tends equipment that forces viscose fluid between two adjustable metal bars and into acid bath that coagulates fluid into continuous sheet of cellophane. Respnsibilities include:
* Reads gauges and observes image on video display screen to ascertain thickness and uniformity of cellophane sheet.
* Turns clamp nuts, using wrench, to adjust bar gap to produce sheet of specified thickness and uniformity.
* Turns valves and starts pumps to regulate flow of viscose.
* Maintains log of operating conditions and output of casting machine.
Industry:Professional careers
A professional who tends equipment that forces viscose fluid between two adjustable metal bars and into acid bath that coagulates fluid into continuous sheet of cellophane. Respnsibilities include:
* Reads gauges and observes image on video display screen to ascertain thickness and uniformity of cellophane sheet.
* Turns clamp nuts, using wrench, to adjust bar gap to produce sheet of specified thickness and uniformity.
* Turns valves and starts pumps to regulate flow of viscose.
* Maintains log of operating conditions and output of casting machine.
Industry:Professional careers
A professional who tends steam oven that heats liquid plastics in glass molds (cells) to form sheets. Respnsibilities include:
* Examines and removes defective molds from handtrucks.
* Loads trucks holding molds into ovens and records time molds entered ovens.
* Turns steam and cold-air valves to maintain specified pressure and temperature in oven.
* Inserts knife into baked sheet or feels sheet to determine that sheet is baked to specifications.
Industry:Professional careers
