DIN EN ISO 294-5:2015-08

This part of ISO 294 specifies a mould (designated the type F ISO mould) for the injection moulding of 80 mm x = 90 mm plates with a preferred thickness of 2 mmwith a preferred size of 80 mm x 120 mm for single-point and multi-point data acquisition because 2 mm has been found to provide the maximum anisotropic properties, with only a slight sensitivity to the rate of injection. When ever possible a two cavity mould shall be used. For the design of plastic parts, this will provide upper and lower bounds for the tensile properties. Matching the plate thickness to a given part thickness is not a suitable criterion because of the effect of mould filling rate and part geometry on anisotropy. Suitable test specimens [ISO 20753 type A22 tensile test specimens or type 1(80 mm x 10 mm) bars] are then machined or die-cut from the plates (see Annex A) and used to obtain information on the anisotropy of thermoplastic parts.