BS EN ISO 294-5:2017规定了一种模具（指定为F型ISO模具），用于塑料的注射成型 首选尺寸为80mm×120mm，最小尺寸为80mm×120mm的板材≥ 90毫米和 单点和多点数据采集的首选厚度为2mm。人们发现它 提供最大的各向异性特性，对注射速率只有轻微的敏感性。 尽可能使用双腔模具。对于塑料零件的设计，这将 提供拉伸性能的上限和下限。将板材厚度与给定零件匹配 厚度不是一个合适的标准，因为模具填充率和零件几何形状会影响 各向异性。材料各向异性的研究是一种特殊的程序，旨在为 用于最终用途的模具设计，不作为质量控制工具。在热塑性材料的注射成型中，熔融聚合物的流动会影响 填充物的取向，如玻璃纤维或聚合物链的取向，导致各向异性 行为在本文件中，流动方向定义为从闸门到闸门的方向 模腔的远端和横向方向为与流动方向垂直的方向。F型模具不打算取代用于确定模塑收缩率的D型模具 热塑性塑料。交叉引用:ISO 294-1:2017ISO 20753ISO 527-2购买本文件时提供的所有现行修订版均包含在购买本文件中。

BS EN ISO 294-5:2017 specifies a mould (designated the type F ISO mould) for the injection moulding of plates with a preferred size of 80 mm × 120 mm and a minimum size of 80 mm × ≥ 90 mm and with a preferred thickness of 2 mm for single-point and multi-point data acquisition. It has been found to provide the maximum anisotropic properties, with only a slight sensitivity to the rate of injection. Whenever possible, a two cavity mould is intended to 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.Investigation of the anisotropy of materials is a special procedure intended to provide guidance in the design of mouldings for end-use applications and is not intended as a quality control tool.In the injection moulding of thermoplastic materials, the flow of molten polymer can influence the orientation of fillers such as fibreglass or the orientation of polymer chains, resulting in anisotropic behaviour.For the purposes of this document, the flow direction is defined as the direction from the gate to the far end of the mould cavity and the cross direction as the direction perpendicular to the flow direction.The type F mould is not intended to replace the type D mould used to determine the moulding shrinkage of thermoplastics.Cross References:ISO 294-1:2017ISO 20753ISO 527-2All current amendments available at time of purchase are included with the purchase of this document.