Casting Stone in Place
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Information  at a Glance Contents on the CD ROM
  • Stone-in-place casting dramatically reduces labor costs associated with manually setting the dozens of tiny gems permitting cost-effective, large-scale production
  • There are two setting methods for stone-in-place casting. With the first, the stones are positioned in the rubber mould and the wax is injected around them; when the wax is extracted from the mould, the stones are already set. This method can be used only with round stones. With the second method, the stones are set in the wax. This method allows for the setting of any type of cut: round, oval square, marquise, pear, emerald, baguette, tapered baguette and fancy cuts
  • In stone-in-place casting process the key point is the preparation of the master model. An adequate preparation of the model leads you to an easy, rapid, precise and safe wax stone setting and a top quality final product
  • Recent trend is Computer aided model making and rapid prototyping with presetting
  • In stone-in-place casting, a wax model of the Jewellery piece is created, and the stones are set into the wax prior to casting. In mass-produced pieces, a rubber mold of the finished piece is used to make multiple wax models. The waxes may be set individually with the stones, or in some cases, the stones may be placed into the rubber mold and the wax injected around them, to produce a wax model in which the stones are already set.
  • The wax model is placed into a flask and a fine-grained, heat-resistant plaster called "investment" is poured around it. Once the plaster has set, the flask is placed into an oven and heated until the wax burns off, leaving behind an empty cavity and the stones, which are held in place in the cavity by the investment
  • The Jewellery metal, normally gold or silver, since platinum's melting temperature is higher than most stones can tolerate, is melted and poured into the cavity, filling the space left by the wax. After the flask cools, a finished, stone-set Jewellery piece is removed from the investment.
  • Stones that change color when exposed to high
    temperatures, such as amethyst or blue topaz, or which will burn at these temperatures, such as pearl and turquoise, are not suitable for stone-in-place casting
  • Successful stone-in-place casting also requires careful design of the settings, so that the investment will hold the stone securely during the casting process. And even with good design and execution, a certain number of stones will loosen or crack during casting. As a result, stone-in-place casting is almost never used for setting large, fine quality gems, which are expensive to replace if damaged
  • The easiest type of wax to use will have good flexibility to set the stone and sufficient resilience to spring back and hold it securely in place.
  • The stones need to fit exactly into the wax pattern, claws may need to be adjusted accordingly
  • Firing with natural stones requires a lower burnout temperature (maximum 630°C/1166°F) and this can give a poor burnout. Any carbon residue from the wax left on or adjacent to the stones can lead to burning of the stones and so it is vitally important that there is a good air flow through the furnace during the burnout procedure. This is easy to achieve in gas fired furnaces but electric furnaces may need extra ventilation holes drilling through the brickwork at the bottom or through the door.
  • Knowledge about limits, (suitable setting, kind of stones and possible alloy), adequate tools and equipment as well as good processing and working skills are also necessary for good results
  • There are Training Institutions, consultancy organisations exist in different parts of the world for skill development, process improvements to achieve Productivity and products Innovations
  • Stone in Wax Casting
  • Cubic Zirconia & Gems
  • FAQ: Stone Casting

Manufacturing Steps

  • Production Steps
  • Casting
  • Dewaxing & Firing
  • Investing
  • Model Making
  • Proportioning Charts
  • Sprueing
  • Wax  Patterns

Process Information

  • Casting Stones in Place
  • Casting Metal Directly onto Stones
  • Casting with the Stones
  • Lost Wax Investment Casting Process
  • Casting with Cubic Zirconia set in wax
  • Colored stone pavé-set Jewellery

Plant & Machinery

  • Machinery & Tools supplier
  • Jewellery Casting Machinery suppliers
  • Lost-wax jewellery casting equipment

Project Information

  • Complete Project & Technology provider
  • Investment powder for jewellery
  • Stones, Metals & Tools
  • Wax Models
  • Guide to Manufacturing

Company  & Products

  • Company profile
  • Company - USA
  • Company - Czech Republic

Technical Consultants

  • Italian Consultant
  • Consultant Presentation
  • Consultant - U.K
  • Training Steps
  • Jewellery Design - Wax Carving

Video Clips

  • 10 video clips links

Market Scenario

  • World of Industry & Trade
  • Recent trends & Developments

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Primary Information Services
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