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  • BSI
    BS EN ISO 294-5:2013 Plastics. Injection moulding of test specimens of thermoplastic materials - Preparation of standard specimens for investigating anisotropy
    Edition: 2013
    $313.97
    / user per year

Description of BS EN ISO 294-5:2013 2013

This part of ISO 294 specifies a two-cavity mould (designated the type F ISO mould) for the injection moulding of 80 mm × 90 mm plates with a preferred thickness of 2 mm for single-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. 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 527-2 type 1BA tensile test specimens or type 1 (80 mm × 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.

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 may influence the orientation of fillers such as fibreglass or the orientation of polymer chains. This can result in anisotropic behaviour. The knowledge of anisotropic behaviour is valuable in designing plastic parts.

For the purposes of this part of ISO 294, 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.



Standard NumberBS EN ISO 294-5:2013
TitlePlastics. Injection moulding of test specimens of thermoplastic materials - Preparation of standard specimens for investigating anisotropy
StatusWithdrawn
Publication Date2013-06-30
Withdrawn Date2018-01-11
Identical National Standard OfISO 294-5, EN ISO 294-5:2013
CorrectsBS ISO 294-5:2011
DescriptorsInjection moulding, Moulded materials, Moulding (process), Polymers, Plastics, Specimen preparation, Thermoplastic polymers, Anisotropy, Plastics and rubber technology, Test specimens
ICS83.080.20 Thermoplastic materials
CommitteePRI/82
ISBN978 0 580 78952 6
PublisherBSI
Pages16

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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