Vacuum casting involves pouring liquid polyurethane into a silicone mould, which cures into a solid part. The master pattern for this mould is normally created using 3D printing or CNC machining, and can carry fine detailing. This method is widely appreciated for its quick turnaround times and is ideal for low-to medium-volume production runs. A tool or mould will typically deliver between 25 and 50 parts without compromising the end part. Originally published here: https://quickparts.com/gb/vacuum-casting-or-injection-moulding/