CLASS CONTENT
PROGRAM #3
Design/Casting
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TYPES OF WAXES & THEIR APPLICATIONS A varied selection of waxes on the market for the jeweler-craftsman are available for demonstration and by the students. Their specific uses and applications are discussed and demonstrated. CREATING WITH FILING WAX Students design and create several wax patterns. Ring sizing is demonstrated and practiced. FABRICATION WITH WAX WIRES AND SHEETS Students construct an article of jewelry using wax wires and sheets. MODELING AND WAX CARVING WITH THE FLEX-SHAFT Using the electric flex-shaft and an assortment of burs to carve and texture wax is the procedure taught and practiced here. WAX SPRUING Spruing procedures are explained and students sprue their completed wax pattern rings in preparation for casting. WAX AND METAL WEIGHING METHODS The correct method for computing the amount of metal needed to cast the student's wax models is demonstrated and accomplished by each student. INVESTMENT MIXING AND DE-BUBBLIZING The correct methods for measuring, mixing and de-bubblizing investment are demonstrated. Each student invests and prepares a flask for burnout. BURNOUT PROCEDURES FOR WAX ELIMINATION Instruction is given for correct burnout temperatures and burnout times needed for different sized flasks. METAL MELTING METHODS Different methods for melting the casting metal are explained. Included are various torch systems and melting furnaces. |
CENTRIFUGAL CASTING Each student casts his individual flask in a spring-loaded, split arm centrifugal casting machine. Balancing, winding, actual casting procedure, and quenching of the flask are demonstrated and then accomplished by each student. ELIMINATING POROSITY FROM CASTINGS All procedures and precautionary measures for eliminating porosity in castings are explained. POLISHING AND FINISHING TECHNIQUES FOR CASTINGS Various techniques and proper procedures for finishing and polishing finished metal castings are explained and demonstrated. Each student polishes and buffs their completed castings. TUMBLING Techniques for cleaning finished castings are demonstrated REPLICA CASTING ORGANIC/INORGANIC How to cast objects made of different materials, other than wax, procedures for organic and inorganic objects such as insects, flowers or plastics, are explained. VULCANIZED RUBBER MOLDS How to pack, vulcanize and cut rubber molds is demonstrated and practiced by each student. Instruction is given on cutting locks, plugs, air vents, etc. WAX INJECTION Students are instructed in the use of air pressure wax injection, for filling rubber molds. VACUUM CASTING The students participate in a class demonstration of vacuum casting, using a perforated flask and a vacuum casting machine. TOOLS, EQUIPMENT AND SUPPLIES What equipment is best suited and applicable to different situations is discussed at length. |
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