Starter kit: first moulded object

In this tutorial, the making of a simple moulded object is described.

Video tutorial

Material

• 100g of rubber powder or granulates
• 2 tbsp. of polyurethane binder
• a mould
• a mixing bowl with a spatula
• a pair of gloves

Steps

1. Put the granulates into the mixing bowl
2. Add the binder
3. Stir until the binder is equally distributed on the granulates
4. Pour into a mould with the desidered shape
5. Press to obtain the desired density
6. Wait at least 24 hours for the binder to set, and remove from the mould

Notes

1. The resulting object will probably crumble a little. More solid moulded objects can be obtained if a pressure is applied onto the object during the setting period. This is for example used for the production of rubber tiles

2. It is possible to accelerate the setting of the binder:

• By adding a bit of water (1 tbsp.) into the mixing bowl, at the same time the binder is added
• By gently heating the mixture in the mould, at 50-60°C for a few hours (depending on the thickness of the moulded piece). Higher temperatures would decrease the setting time, but could results in unpleasant odours.
• Chemical accelerators also exists ont the market, but they were not inculded in the starter kit.

Final result

Sample objects done with the stater kit

Tutorial to create a keel of Mölkky (french)

You want to go further ? Find out more about

• End-of-life tyre applications that already exist
• Ideas that were suggested during brainstormings
• The raw materials at your disposal
• How to shape these materials