| 摘要 |
A matrix (2) adapted for use in a mould (1c,1d) of a plastic element-producing machine (1), said matrix (2) having a surface that presents a negative microstructure. The matrix is characterized in that (i) the microstructure includes a wear layer (7) which provides a wear surface (7b), such as a metal surface, towards a plastic element (3) manufactured in said mould (1c,1d), said layer (7) being supported by a carrier surface (8b) of a carrier element (8), and (ii) the matrix (2) is connected to heating means (4) to supply electrical heat energy to the whole or part of the matrix via, or immediately adjacent to, the microstructure and (iii) the wear layer (7) and/or a layer (8,31,41,42,51,52,61, 62) supporting this layer consists of an electrically conducting or electrically semi-conducting material. <IMAGE> |
