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Vacuum forming / Thermoforming
Feature
1. Vacuum forming is a popular deforming process. Vacuum forming works by removing air, thereby creating a partial vacuum underneath a soft and flexible thermoplastic sheet and allowing atmospheric pressure to push the plastic down onto a mould.
2. Figure 5 shows a typical mould. The vacuum forming process may start with a blow that stretches the plastic or it may be started by raising the mould, on the plate, to create a draping form. On some machines a combination of these processes is used.
3. The aim is always to create a high definition outcome without any excessive thinning having taken place.
Vacuum forming / Thermoforming