| Job Title |
Plaster Molder I |
| Job Description |
Lays Out Parting Line On Patterns And Casts Plaster Molds
According To Blueprints, Sketches, And Oral Instructions,
Applying Knowledge Of Metal Characteristics, Pattern Contours,
And Pouring Procedures: Locates And Scribes Parting Line On
Wood, Metal, Or Plastic Patterns, Using Measuring Instruments,
Such As Calipers, Square, Depth Gauge, And Straightedge. Mixes
Plaster Powder And Water According To Standard Formula. Places
Cope And Drag (upper And Lower Half Of Flask) On Molding Table.
Pours Liquid Plaster Into Drag And Positions Pattern In Plaster
Up To Parting Line. Removes Excess Plaster, Using Straightedge,
And Allows Mold To Harden. Places Cope On Completed Drag, And
Makes Depressions In Plaster Around Drag Pattern To Ensure
Accurate Joining Of Mold Halves For Casting. Brushes Parting
Agent On Surfaces Of Mold, Pattern, And Flask And Pours Liquid
Plaster Into Cope. Separates Cope And Drag After Specified Time
And Removes Pattern. Repairs Cracks And Broken Edges Of Molds,
Using Molder's Handtools, Such As Spoon, Trowel, And Slick.
Removes Excess Plaster From Molds, Using Knife Or Bandsaw. Joins
Cope And Drag Sections Of Mold Together By Aligning Them In
Flask And Pouring Liquid Plaster Over Them. May Cut Gates And
Risers Into Baked Mold. May Position Cores In Drag And Assemble
Mold. May Pour Molten Metal Into Molds, Using Hand Ladle.
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