3drapidprototyping.co.uk

Making 3D printed Jewellery

3D printing helps provide surgeons with the opportunity to study organs, and develop a detailed strategy for surgery.

We took this highly detailed complex 3d printed model and powerful symbol of the emotion of love, and cast the model in silver and created a jewellery pendant.

1. Using MRI scanned data a STL file was produced, to create a 3D printed copy of the human heart, the 3D printed model highlights the hearts complexity.

STL file CAD model of human heart…

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 2. The model was analysed using Magics software from Materialise to repair and fix the file, as the model needs to be water tight and without error in the geometry. 

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 3. Inside the heart - we can see inside heart has four chambers and four valves and is connected to various blood vessels.

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 4. Because for the casting jewellery we needed reduce the wall thickness inside heart to save weight of materials for casting.

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 The model was prepared to be printed with Magics software from Materialise making a support and sliced 0.025 mm layer thickness with Perfactory RP software …

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5. The model of human heart was 3D printed on the Envisiontec Aureus

The 3d printing took approximately time 8 hours…

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The same model of the heart (below) 3D printed on the 3D systems  Projet 1200 using Geomagic Print 1200 produced with a layer thickness of 0.034mm took 2 hours 35 min to print with Visijet FTX green resin.

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6. The final 3D printed model of human heart after cleaning with Isopropyl alcohol and removing the support. For the curing a model I am used UV lamp approximate 5 min …

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7. we need to prepare wax tree for the Lost-wax casting (also called "investment casting", "precision casting") adding sprue, is the process by which a duplicate metal sculpture (often silvergoldbrass or bronze) is cast from an original model

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8. Investing the flask process – mixing the investment powder with deionised water under vacuum is crucial avoid air bubbles inside the investment mixture.

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9. Dewaxing and burning out the flask: The resin wax is then subjected to a burnout, which heats the resin between 300 °C and 750 °C to remove any moisture and residual resin wax.

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10. Vacuum casting the silver with vacuum pressure casting (VPC)

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11. After casting – when the metal in the flask is no longer glowing red in dim light, it is quenched in a bucket of cold water … This causes the still hot investment to react by bubble and fall apart, freeing the metal casting inside the flask.

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12. The cast model –. The sterling silver casting comes out of the flask looking very much like black wrought iron and covered with gooey investment.  After we can cut the model from the sprue. Every charm has a sharp point where the sprue was cut from the tree and filled smooth. The charms are then placed into a vibrating tumbler with water and metal pins after several hours to polish the surface.

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 The Final Model is polished and Rhodium plated using Electroplating which is a method of depositing a micro layer of rhodium on the surface of the piece.

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The final Heart Polished to a brilliant finish.

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+44 7714 918736