Silicone molds for centrifugal casting

Wide range of molds for the manufacture of parts

We design, manufacture and supply a wide range of silicone molds for the manufacture of parts by centrifugal casting. Our molds are designed to adapt to the different types of metals, as well as to the various sizes and shapes of the parts to be manufactured. Do not hesitate to contact our technical advisors to find out which mold best suits your needs.

CONIEX S.A. designs and manufactures, for more than 36 years, a wide range of silicone and rubber molds, which are specially designed for centrifugal casting with low melting point metals: zamak (zinc) and pewter (tin).

In the R&D laboratory, our engineers continuously develop new and advanced formulations that extend the life of the molds and improve their thermal and mechanical properties, making them a reference for the sector.

The mold technology manufactured by CONIEX S.A. allows other materials such as resins, waxes, chocolate or caramel to be cast.


These silicone molds are characterized by their high thermal and mechanical resistance. Coniex molds provide high productivity thanks to their long service life and reduced labor costs in mold making.

These are flexible molds made of silicone rubber, specially designed for centrifugal casting of low melting point metal alloys, mainly zamack and pewter. They also offer high performance in the centrifugation of resins.

The main sectors used are:

  • Jewelry
  • Wargames and miniatures
  • Shoe ornaments
  • Buckles and fashion accessories
  • Gift items
  • Sports trophies
  • Gift items
  • Pins and medals
  • Religious articles
  • Maquetismo
  • Key rings and advertising items

SILCODISC-HT are a new generation of high performance molds, which are the result of a large number of tests, carried out both in the laboratory and in industrial applications. Some of its main features are:

  • Outstanding thermal resistance
  • High flexibility that facilitates the demolding of complicated parts.
  • High resistance to metal abrasion.
  • Absence of “reversion” (softening) to temperature

Below is a video presentation of our range of SILCODISC silicone molds.


High-performancerubber molds for the manufacture of flat or low backlash parts. These molds are characterized by superior hardness and are suitable for high production rates.

We advise you to consult our technical department to find out which type of mold is best suited to your process.

The characteristics of the Zamakdisc series are detailed below:

  • Printing of perfect profiles.
  • There is no reversion at high temperature, i.e. no softening occurs in thin sections, but on the contrary, the contours harden with successive castings.
  • This results in healthier casts, with shiny surfaces that considerably shorten the subsequent vibration time of the parts.
  • High mold performance due to its high abrasion resistance.
  • Particularly suitable for flat parts or parts with little/no overhang.
  • Low shrinkage.
  • Great ease of demolding.
  • Rapid heating of the mold, which allows good parts to be produced from the first casting.

How to choose the right silicone mold

More than 3 years of experience as a manufacturer of silicone molds guarantee the quality of our solutions for centrifugal casting. During all these years, our R+D+i department has developed, in close collaboration with our customers, a series of specific mold ranges that meet the needs required in each case.

Our molds are characterized by an extraordinary thermal resistance, which is necessary for the molds to last as long as possible and take longer to burn out casting after casting, and by an excellent mechanical resistance, which gives flexibility to the mold to facilitate the removal of the parts without tearing or breaking.

When choosing the most suitable mold for the manufacture of parts by centrifugal casting, we must take into account different factors, among which are the type of metal to be cast, the shape of the part and its size. For example, the characteristics of a flat piece, such as a medal or a sports badge, are completely different from those of a piece of costume jewelry which, due to its morphology, will be difficult to extract from the mold.

Next, we will see which range of molds is the most suitable, depending on the three factors mentioned above:

1. The first point to keep in mind is the metal or alloy to be worked with. Thus, depending on the metal to be melted, we will choose one range or another:

  • For pewter parts, i.e. for tin alloys, we manufacture the Silcodisc-PE series, which is available in different hardnesses.
  • For the manufacture of parts in zamak, i.e. zinc alloys, we will choose between two different ranges:
    • Silcodisc-EXTRA; suitable for large or thick parts due to its excellent temperature resistance, e.g. sports medals, large and thick buckles, etc.
    • Silcodisc-BZ: range of molds designed for all types of parts, but especially suitable for parts that require good mechanical and thermal resistance, such as jewelry parts, trimmings, buckles etc.
  • RESIN parts: If what you need is to reproduce resin originals, such as 3D printing parts and they do not resist the normal vulcanizing temperature, Coniex manufactures the Silcodisc-MA 90 and MA 120 series that vulcanize at 90º and 120º respectively.
  1. The second factor to consider is the morphology, or shape of the part. The morphology of the piece will determine the degree of hardness to be chosen.
  • For flat parts without undercuts, we will opt for a mold of greater hardness.
  • However, if we have parts with areas that are difficult to demold, i.e., difficult to remove from the mold, we will choose a lower hardness, which will allow us to flex the mold and facilitate the removal of the parts without damaging it.

It is very important to always choose the mold with the highest possible hardness among the different options available for the shape of our part, since this way we will have less deformation in the reproduced parts.

  1. The third point to be taken into account is the size of the part. This variable influences the diameter and thickness of the mold, since it has to be adapted to the size and thickness of the parts to be manufactured.

At Coniex we have different diameters and thicknesses so that our customers can choose the most suitable mold and, in this way, get the best performance and profitability out of their production processes.


In addition to the molds, we provide our customers with all kinds of accessories and tools to make the making of their molds easier and more productive.

Additionally, we offer casting courses for those professionals who need to improve their casting techniques to increase both the quality of their parts and the profitability of their production process.

If you have any questions about the correct choice of a mold, please do not hesitate to contact one of our centrifugal casting specialists.

Accessories and complements for centrifugal casting




Manufactured from high quality steel for perfect vulcanisation


Essential tools to facilitate the making of the moulds


They have a design and shape that allows a perfect seal during the process.


Teflon rods and silicone cord ideal for hairpieces




It is used as a release agent in the mould vulcanisation process.


We have the material and equipment for work protection


We have a wide range of accessories for centrifugal castings.


For zamak and pewter, specially designed silicone to prevent mould breakage

Ask for more information about our silicone molds.