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.