Compression tool for manufacture of hollow or semi-hollow jewellery products from metal sheet has metal faced plastic tool components

摘要

A lower die(1a) and/or upper punch(1b) of the tool comprises a plastic body(2) with a metal layer(4) in at least the product forming area. An Independent claim is also included for a process for manufacturing the compression tool in which a metal layer is deposited on a model or an impression of a model of the jewellery and a plastic body is formed on the one side of the metal layer. Preferred Features: The metal layer may also extend into areas surrounding the forming area. Metal layers are >= 0.02mm, preferably 0.05-0.5mm thick Plastic bodies are 1-4mm, preferably 1.5-2.5mm thick at the thinnest section. Both tool parts may comprise a plastic body with a metal layer face or where only the die has a metal layer face the punch is made of an elastomer.