Mold Making
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This is a page about making molds. It will be focused on rubber molds (polyurethane rubber, silicone).
Contents
Mold making materials[edit]
Polyurethane rubber[edit]
Silicone rubber[edit]
Tin cure[edit]
Platinum cure[edit]
Other[edit]
Factors to consider when making a mold[edit]
- 1 part, 1 part tear, or 2 part mold
- Mold box
- Mold release
- Rubber hardness & viscosity
- Shore hardness
- Vacuum degassing
- Pressure casting
- Master material
- Porosity & sealing
- Materials that inhibit curing
- Sulfur
- Some plastics (see below)
Making mold of 3D printed parts[edit]
Cure inhibition[edit]
- SLA resin
Mitigating cure inhibition[edit]
- https://joshuawoehlke.com/curing-silicone-in-sla-uv-molds-part-3/
- Inhibit X
- Using polyurethane rubber or tin cure silicone instead of platinum cure silicone
- Sealing with acrylic (e.g. Krylon Crystal Clear)
Resources[edit]
Where to get mold making materials[edit]
- Reynolds Advanced Materials (Denver)
- Sculpture Depot (Loveland)
- Rio Grande
