1. Vacuum Forming Process 1 Heat up plastic (HIPS)
2 Remove heater and blow air in
3 Raise the Mould
4 Remove air using vacuum pump
5 Lower the mould releasing the shaped plastic

2. Mould/Former Rounded Edges – to help achieve accurate formed shape
Medium Density Fibreboard (MDF) Mould/Former
Tapered Sides –
To allow easy release of mould
Air/vacuum holes -
To help remove all the air and achieve an excellent
vacuum formed product

3. Vacuum forming Problems
Webbing – overheating of plastic, causes a fold in the plastic as the air is removed during the vacuum forming process
Webbing
Webbing