Prototype and Short-Run Mould Maker

Product designers, start-up founders, small manufacturers, model makers and craft brands that need prototypes or short production runs.

A fixed price per mould or tool, often with extra for the design work and for casting small batches of parts. Repeat orders from the same customers are the main driver.

• 3D CAD design
• Patient, precise hand work
• Knowing how materials cast, cure and release
• Clear communication with customers

• Public liability insurance, and product liability cover if you also supply the cast parts
• Safe handling and ventilation for resins, silicones and solvents, so check the safety data sheets (COSHH)
• Check whether your landlord, mortgage lender or council allows this kind of work at home
• Agree who owns the design and who is responsible if a mould is used to make a faulty product
• Customers may try to copy others' designs, so ask for confirmation they have the rights

Estimates suggest startup costs typically around £3,000 to £15,000, depending on the equipment and materials you choose, such as 3D printing and casting kit. Budget for insurance and safe ventilation too.

Monthly revenue is typically estimated at around £800 to £4,000, depending on how many projects you take and their size. Hours can start from around ten a week, so many people build it up gradually.

Check public liability insurance, plus product liability if you supply cast parts, and COSHH safety data sheets for resins and solvents. Also check whether your landlord, mortgage lender or council allows work at home, and agree design ownership and rights.