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Introduction to Lost Wax Casting

Introduction to Lost Wax Casting. What can you do with Lost Wax Casting (LWC)?. Charms Pendants Rings …. This process is used for making jewelry, but is also an industrial process and used to make large sculptures. How does it work?. Make a mold out of wax. Encase the mold in plaster.

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Introduction to Lost Wax Casting

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  1. Introduction to Lost Wax Casting

  2. What can you do with Lost Wax Casting (LWC)? • Charms • Pendants • Rings • …

  3. This process is used for making jewelry, but is also an industrial process and used to make large sculptures.

  4. How does it work? • Make a mold out of wax • Encase the mold in plaster • Cook out the wax • Fill the empty plaster cast with metal • Clean it up, sand & polish

  5. Step by step (Write this down!) • Make a wax (or sometimes plastic) mold • Weigh it, or measure the volume, so you know how much metal you need to fill the mold (gold, silver, bronze, etc.) • Sprue up • Attach your mold to a rubber base • A flask is slipped over the base • Fill flask with investment (the plaster – it looks a bit like pancake batter) • Vacuum the bubbles out of your invested flask

  6. Step by step (2) Write this down, too. • Let it dry and harden • Minimum of two hours • Remove the base • Put the flask into an oven to burn out the wax • Cast your metal • A centrifuge is used to force the melted metal into the investment mold • Clean up your piece by filing, sanding and polishing it.

  7. Getting started • Things you'll need • sticky wax • designer wax • steel flask • rubber base • some masking tape • a tool for scooping the wax • a kerosene lamp.

  8. Spruing up • Attach the sprue onto the wax mold using sticky and designer wax • Figure out the amount of metal needed for casting. • We have a couple of methods you can use.

  9. Attach sprue to base • Attach the sprue on the mold to the rubber base • You may need more than one sprue, depending one shape and size This one is nice! This one is too long!

  10. Protect your investment • Attach the masking tape to top of the flask to prevent spilling • Fill the flask with investment • Vacuum the bubbles out

  11. After the investment is dry, burn out the wax in a kiln • Take it from the kiln and set it inside the centrifuge machine so the hole lines up with the hole in the crucible • Remember it will be very, very, very HOT

  12. Mr. Peters will Cast your piece • Add metal to the crucible • Use a torch to melt it • Once it gets hot enough, push the button to spin the centrifuge (while the torch is still held over the metal) • Back off quickly because the centrifuge spins around • This forces the metal into the tumbler • Remember it will be very, very, very HOT

  13. Button – GOOD No Button - BAD Open your present • Once the centrifuge stops spinning, pull the flask out • Let it cool for about a minute • Drop into room temperature water • Your piece will be somewhere in the goop • Remember it will be very, very, very HOT

  14. Clean it up • You still need to clean up the cast piece • Saw the button off • File to finish shape and size • Sand • Polish • It will be marvelous!

  15. Stone in place casting provides a fast, efficient alternative to stone setting allowing several processed to be combined simply and effectively. This has proved to be cost effective and efficient method of jewelry production.

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