Uses of Teflon bars in spin casting

After more than 32 years in the spin casting sector, from CONIEX we want to offer you the best solutions to optimize your processes to the maximum and obtain pewter and zamak parts of the best quality.

Today we would like to talk about Teflon bars in silicone moulds to create inserts and melt pieces with blind holes.

What are the Teflon bars?

Teflon is a material with excellent properties. It is non-sticky, has low wettability and surface energy and does not generate friction.

Teflon bars are ideal for creating very precise and highly durable inserts or blind holes in silicone molds for centrifugal casting. Teflon is a high-temperature resistant material, so it withstands the vulcanization process and the heat of molten metal without expanding or deforming. In addition, it is completely non-stick and is easily removed from castings without leaving marks.

At CONIEX we sell perfectly calibrated Teflon bars of different diameters, in order to obtain any type of hole or false in the pieces during centrifugal casting processes. We have Teflon bars from Ø 2 mm to Ø 20 mm.

In addition to rectified Teflon bars, and in order to adapt to the needs of all our customers, CONIEX offers the possibility of supplying this material in sheets of different sizes and thicknesses.

How are Teflon bars used?

Using Teflon bars in spin casting silicone moulds is very simple. Just follow the steps that follow:

When making the mold, we must place the Teflon bar in the hole of the piece we want to be hollow.

Each time we make a casting, we must let the piece cool completely and then extract the Teflon from it.

Put the Teflon back in the same way and proceed to make the next casting.

When the Teflon wears out or burrs start to appear, it is replaced by another cut exactly the same and the same mould is used until the end of its useful life.


Our Technical Team is at your disposal to advise. Do not hesitate to contact us to solve any doubt in this respect.

For more information, you can consult the rest of the pages of CONIEX.

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