Patent ID: 7867423
Filing Date: 2011-01-11
Classification: B22D,B22F,B29C

Abstract:
1. A method of moulding comprising the steps of: forming a mould with a member having a surface with a topography; applying a mould lining to said mould surface so as to replicate the mould providing surface discontinuities in said mould lining as re-entrant features, the surface discontinuities having three dimensional variations including at least one of holes, slots, folds, spots and corrugations defining a discontinuity surface area, and having a shape such that when viewed from a direction transverse to the moulded material contact surface an entirety of the discontinuity surface area is not visible; wherein the surface discontinuities have a depth less than 1% of the moulded material thickness once formed, wherein the moulded material thickness once formed is defined by the width of the inner cavity of the mould less a thickness of the mould lining; and presenting a material to the mould for moulding whereby the moulded material is textured by the surface discontinuities.