Update 9th January 2023
More Casting Machines in Build. We are nearing the completion of casting machines
being built for our offline customers and so more should be available on our site in the coming weeks. Thank you for your patience.
We have implemented a notify when available button on out of stock items.
Just press the button and you will be notified by email when that item comes into stock.
This will save you having to manually waste time checking stock.
Again thank you for your patience.
Please note we do not take pre-orders but only sell from stock in hand.
Please note until further notice we are only shipping to the UK.
Shipping to Europe will re-commence once we have re-evaluated pricing and paperwork workloads.
What is Centrifugal Rubber Mould Casting
Centrifugal rubber mould casting or spincasting, is a method of utilizing centrifugal force to produce castings from a rubber mould. Typically, a disc-shaped mould is spun along its central axis at a set speed. The casting material, usually molten metal or liquid thermoset plastic, is then poured in through an opening at the top-center of the mould. The filled mould then continues to spin as the metal solidifies or the thermoset plastic sets.
The spin casting process typically uses vulcanized silicone or organic rubber as the mould-making substrate. Vulcanisation is an integral step that occurs halfway through the mould-making process. Prior to vulcanisation, the mould rubber is a soft and malleable solid-like fluid, in many ways very similar to Silly Putty. Because of the clay-like nature at this stage, the mould is easily cut or shaped to accommodate irregular models. Vulcanization serves two purposes: establishing the negative space inside the mould as well as hardening the rubber so it will remain strong and rigid during casting.
After vulcanization, before it is usable, the mould must undergo gating and venting. This involves carving channels to ensure proper air and material flow during the casting process. Gating and venting is typically done by hand using a sharp knife or scalpel and varies in time depending upon the complexity of the mould. The final product is a cured rubber mould which can withstand anywhere from hundreds to over a thousand casting cycles before it needs replacement.
Spin casting is very commonly used for the manufacture of the following types of items:
Decorative and novelty type items – belt buckles, pins, emblems, medallions, trophies, assorted souvenirs etc.
Industrial manufacturing and replacement part production.