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Thursday, 11 December 2008 19:35 |
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Vacuum forming or thermoforming is commonly used to make blister packages, disposable cups, trays, signs and many other thin items with simple forms. Heat-softened thermoplastic sheet is positioned over male or female mold; air is evacuated from between sheet and mold, forcing sheet to conform to contour of mold. Variations are vacuum snapback, plug assist, drape forming, etc. Tooling costs are generally low. Large part production with thin sections is possible, and often comes out economical for limited part production.
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