Organization / Terms / jewelry mold maker

How to be a jewelry mold maker
In the past beeswax was used to make the desired object. Today we have many different kinds of wax. It can be hard wax, soft wax, sticky, shrinking or non-shrinking. In the past clay was taken from the shore of a river. The wax object was embedded in the clay with a hole left open. Today the wax object is embedded in a special heat resisting kind of plaster called investment powder.

Jewelry mold maker and powder: The powder is mixed with water and poured in a cylinder that holds the wax model. In order to get air-bubbles out of the mixture it is put under vacuum. The cylinder with the still liquid plaster is placed under a bell jar and the air is removed by means of a vacuum pump. The air is let back in and the investment now has no more air bubbles that would become small metal balls on the object once the molten metal goes in. In the past the dried clay with the wax inside was put on a charcoal fire. Air was blown onto the fire and the clay baked until hard. At the same time the wax burned away and the mold was created. Today for jewelry mold maker the hardened investment with the wax model inside goes into an oven. Jewelry mold maker and wax: The wax is burned out and the mold is ready to receive molten metal. In the old days the metal was melted by blowing lots of air towards the fire that held a clay crucible with the metal in it and once liquid, it was poured in the clay mold. Jewelry mold maker and clay:

The clay was then broken and the object released. Today we heat the metal with a torch that burns gas and oxygen, and the pouring of the metal into the mold has been very much sophisticated. Because liquid metal has a viscosity that resembles treacle, it is so thick that it will not flow easily into every recess of more or less intricate designs. Jewelry mold maker methods: Therefore different methods have been developed to force the molten metal down into the mold. The channel towards the object inside the mold is called a sprue and has to be wide enough to let the metal flow through fast enough. Not too wide so that it becomes difficult to cut it from the object later. Many thin sprees are better than one thick one jewelry mold maker from YTC Taiwan jewelry mold maker