Method for the production of tools for deep drawing, moulding, extruding and the like
AssigneeAB Volvo
InventorHans B. E. Jansson
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Abstract
An exact replica of a tool for deep drawing, moulding, extruding and the like is manufactured by a method according to the present invention by thermally spraying the wearing surface of the tool to be produced onto a negative replica of the tool to be produced, said last replica being constituted of an easily fusible metal with a lower melting point than the plastic material used for backing up (1) the easily fusible negative replica and (2) the thermally sprayed wearing surface of the tool. According to the method of the invention the wearing surface of the tool can be constituted of steel, carbide or oxide.
Claims6
A method for producing tools for deep drawing, moulding, extruding and the like, comprising forming a working model having a surface the shape of the tool to be produced, coating said surface with a release agent, thermally spraying on said coated surface a thin layer of an easily fusible metal or metal alloy, backing said sprayed layer with a stiffener of heat-resistant plastic, loosening the working model from the sprayed metal layer stiffened with plastic, thermally spraying on said easily fusible layer a wearing layer of the material of the intended tool, to a depth substantially thicker than the depth of said easily fusible layer, backing the wearing layer with a plastic that withstands a temperature sufficiently high to fuse said easily fusible layer, heating the assembly of easily fusible layer and wearing layer and plastic backings to a temperature sufficiently high to fuse said easily fusible layer, and separating the wearing layer and its plastic backing from the easily fusible layer and its plastic backing.
Dependencies are inferred from the claim text.