WORK PROCESSES
PATTERNMAKER, METAL
O*NET/SOC CODE: 51-4062.00 RAPIDS CODE: 0395
DESCRIPTION: Lays out, mills, drills, turns, grinds, fits, and assembles castings and parts to make metal foundry patterns, core boxes, and match plates, using handtools and machine tools, and analyzing specifications, according to knowledge of patternmaking methods. Studies blueprint of part to be cast, computes dimensions, and plans sequence of operations. Measures, marks, and scribes layout on castings. Sets up and operates machine tools, such as milling machines, lathes, drill presses, and grinders, to machine castings to specifications. Assembles pattern, using handtools, and bolts, screws, or other fasteners. Cleans and hand finishes workpiece, using emery cloth, files, scrapers, and powered hand grinders. Verifies conformance of machined pattern to blueprint specifications, using templates and measuring instruments, such as scale, calipers, and micrometers. May make templates for layout and inspection. May operate welding equipment in assembling pattern.
ON THE JOB TRAINING:
APPROXIMATE HOURS
1. WORKING FOUNDRY
200
a. Helping molder and coremaker
2. WORKING IN PATTERN LOFT
200
a. Delivering patterns to foundry
b. Storing and marking patterns
3. BENCH WORK
1200
a. Sawing, filing, scraping, polishing, forging,
threading and reaming
4. SOLDERING AND GATING
1000
a. Soldering of brass and bronze, copper,
white metals, steel aluminum.
b. Making gates for white metal castings,
gray iron castings, bronze and brass casting,
and malleable iron casting.
5. CORE BOXES
1000
a. Making single and multiple cores and core boxes
6. LATHE WORK
2000
a. Rough turning, facing, cutting chamfers and
fillets, recessing, turning angles and tapers,
turning eccentric and offset work.
7. MILLING MACHINE
1900
a. Finished milling on castings, angles, aluminum
splits, recesses.
8. DRILL PRESS
900
a. Drilling and countersinking on brass, steel, white
metal and dowel and taper holes
9. TOOL AND DISC GRINDING
500
a. Tools, rough castings, leaders and discs
10. LAYOUT WORK
1100
a. Layout of split patterns, work on angle irons,
and the making of layouts from drawings, and
samples
b. Laying out small, medium and large intricate patterns
TOTAL HOURS
10,000
RELATED INSTRUCTION
1. Blueprint Reading
2. Freehand Sketching: Beginning with straight lines, angles, square, inscribed squares, pentagons in squares, hexagon and octagons in squares. Inscribed cones, prisms and circles.
3. Making freehand isometric and cabinet drawings of simple objects selected from the shop.
4. Mechanical Drawings: Principle of orthographic projection applied to drawing simple objects available from the plant. Care in making figures, letters, arrowheads, center lines, witness lines, etc.
5. Shop Mathematics: Applied fractions, decimals and percentages involved in shop practices.
6. Use of formulas in the shop.
7. Practical Geometry: Practical trigonometry, applied to shop practices.
8. Use of scales, calipers, micrometer calipers, Vernier calipers, height gages, surface gages.
9. Science: Applied science in relation to materials used in pattern shop and foundry – physics, chemistry.
10. Brief general history of foundry and pattern shop.
11. Plant economics and stock handling.
12. Drawing: Advanced practice in orthographic drawing.
13. Principles of pattern making, core making, molding.
14. Study of materials: Wood, metal, joining and finishing materials.
15. Pattern design and layout.
16. Tool design involved in pattern making.
