THERMO FORMING:
Process:-
This is a process where flat sheet material is converted to a three dimensional shape. The process requires that the sheet material be brought to a thermo plastic state by the addition of heat and then forced into a mould, pneumatically or by mechanical means. The process is also called vacuum forming since much of the early work was done using vacuum to provide the forming pressure.
There are number of advantages to the thermo forming process. One of the most significant is that of the tooling. In comparison to the other methods, is relatively inexpensive. Since the technique is particularly suited to the production of many large parts, cost savings can be impressive. Many parts with very thin wall thickness can be made only by this method. The process is also ideal for the production of small number of parts - samples, prototype etc. the process now is used to produce such items as refrigerator door liners, automobile dash board panels, cheese containers, soft drink cup, signs, packaging etc.
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