| 摘要 |
A method of forming a matrix assembly is disclosed which comprises providing a steel strip (10), treating the upper surface of the steel strip with a resin adhesive, extruding one or more plastic material strips (24, 26) onto the metal strip to define a longitudinal channel (28) and heating the assembly so formed to cure the resin adhesive and adhere the plastic material to the metal strip. The method of the invention obviates the need to perforate the metal strip and this leads to a number of advantages. Firstly, omitting the perforation step enables the matrix assembly to be produced more cheaply. Secondly, with there being no perforations present, it is possible to use a thinner steel strip (for example, of thickness of 0.002") and still retain adequate strength. This means that no modification need be made to the height of the creasing dies in a cutting and creasing press. |
