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Job Description:

  • 1) Casts plastic reproductions of models, patterns, and prototype parts: Examines part to determine sections that can be cast and assembled to obtain reproduction.

  • 2) Constructs boxlike enclosure around section of part to be duplicated.

  • 3) Brushes or sprays surface of section with parting agent to prevent plastic from sticking to surface.

  • 4) Casts part, using either of following methods: Brushes plastic facing coat on section of part to be cast.

  • 5) Mixes plastic resin and brushes thin, uniform coat over facing coat.

  • 6) Cuts fiberglass cloth to approximate size of cast and places it over resin.

  • 7) Brushes cloth to smooth it, applies additional coat of resin, and repeats procedure until alternate layers of fiberglass and resin are built up to specified thickness.

  • 8) Brushes plastic facing coat on section of part to be cast, mixes plastic resin, and pours it into enclosure until cast is of specified thickness.

  • 9) Removes hardened cast from section.

  • 10) Files, grinds, and sands cast to remove jagged edges and to cut cast down to specified dimensions.

  • 11) Forms base and bracing structure to support cast, using handtools and liquid adhesive.

  • 12) May assemble casts to produce completed model, pattern, or prototype.

  • 13) May bolt or otherwise fasten metal inserts to casts at specified points.




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End Of Job Description for: "PLASTIC DUPLICATOR"
DOT:   754.684-038

Job Number: 7555