Ever wondered how they make those small enclosures for medical pills? Which process finds use in museums, souvenir industry, furniture, sanitary wares and even aeronautics? It is Vacuum Forming also known as vacuuforming. This simplified version of thermoforming was first used commercially by Robinson Industries in Michigan, USA. A plastic sheet heated to forming temperatures is held over a mould and is shaped by creating vacuum between the mould and the sheet. It can be used for both shallow and deep moulds but for the later, the plastic sheet needs to be pulled, mechanically or pneumatically, prior to the process.
Why Is Vacuum Forming Better?
The biggest benefit is its economy for small and medium runs of production. It is quick to set up and the tools used are cheaper, than in other methods. In addition, it lends itself to almost any design and there is no need to paint later as colour & texture are formed in during the process itself.
Some Issues
These issues are avoidable but require regular monitoring before and during the process. Moisture, if any, can form into bubbles inside the plastic, so the plastic sheet needs to be completely dried before the process. The mould should be regularly monitored to avoid webbing. Also, the angle, while forming, needs to be 3 degrees or more to avoid sticking of plastic to the mould. For long this was seen as a very sophisticated process but newer smaller machines have made Vacuum Forming a viable alternative to injection moulding.
Vacuum forming is used by Display Developments as well as Plastic fabrication. So contact us today and see how we can help you!








