What are these "Wax Sprues" used for? => 16 photos

 This ring is a two-piece construction, but look at the little round connecting rod in the centre photo of the '1/2 wax ring'. 

 Together, these two 1/2 items will be just one ring. This will make the ring easier to polish and the setting of the two stones.

These sprues are not just ornaments, but are seen as important features in jewellery assembly.

 I would hold the wax model with only the 'sprue', in case I might damage the important features of the pattern.

When any modification is required, or stone setting, it is advisable to hold the sprue with continued caution.

 The addition of the wax sprue is a two-fold process. It should be used for holding as well as a method of allowing the molten casting metal to flow with much ease.

 There is much care & thought involved in how and where the sprue is finally attached.

 I placed the sprue under the pendant, instead of directly to the outer surface.

 The wax sprue is an integral part of the new pattern then let it work 'as a team'.

  These photos are from a previous tutorial essay, but they are extremely useful. The sprue allows the hot metal to flow to areas that will ensure wonderful results.

 We can move the wax model anywhere on the wax stem, thus giving us the correct balance of what the designer or manufacturer wishes.

 We can adjust the spacing of wax models at any time, without damaging the main design.

 It is imperative that we hold the wax pattern with only the sprue. If not, the results would be catastrophic as ruining the delicate claw settings.

 

 The joining of the wax sprue to the main pattern must never be thought of as an afterthought. Always remember that if the sprue is not correctly joined, the flow of metal will be greatly endangered.

 

 The width of the wax sprue MUST ALWAYS BE UNIFORM and never deviate from the original.

 If any section of the wax line needs to be shortened, so be it. This must be done with the greatest of care.

 It is best not to, or never allow, the NEW wax pattern to be handled. Lay the wax flat on a table or your bench, and do any alterations where necessary.

   Make your 'joining of the waxes' deliberate and with exacting precision. I would (on occasion) increase the width of the wax around the wax sprue where it meets the wax holding stem.

 We are not looking at esthethics, but the eventual flowing of hot casting metal.