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Norma Técnica
Código
ISO 294-5:2011   CANCELADA
Data de Publicação : 07/04/2011
Título : Plastics — Injection moulding of test specimens of thermoplastic materials — Part 5: Preparation of standard specimens for investigating anisotropy
Título Idioma Sec. : Plastiques — Moulage par injection des éprouvettes de matériaux thermoplastiques — Partie 5: Préparation d'éprouvettes normalisées pour déterminer l'anisotropie
Comitê : ISO/TC 61 Plastics
Páginas : 7
Status : Cancelada em 09/11/2017  Substituída por : ISO 294-5:2017
Idioma : Inglês
Motivo do Cancelamento : iso:pub:std:IS:45073
Organismo : ISO - International Organization for Standardization
Objetivo : ISO 294-5:2011 specifies a two-cavity mould (designated the type F ISO mould) for the injection moulding of 80 mm x 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 x 10 mm) bars] are then machined or die-cut from the plates 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.
Normas Necessárias para a aplicação da ISO 294-5:2011
ISO 294:1975
ISO 294:1995
ISO 294-1:1996
ISO 294-1:1996/Amd 1:2001
ISO 294-1:1996/Amd 2:2005
ISO 294-2:1996
ISO 294-2:1996/Amd 1:2004
ISO 294-3:1996
ISO 294-3:2002
ISO 294-3:2002/Amd 1:2006
ISO 294-4:1997
ISO 294-4:2001
ISO 294-4:2001/Cor 1:2007
ISO 294-5:2001
ISO 294-5:2001/Amd 1:2004
ISO 294-5:2001/Cor 1:2003
ISO 294-5:2011
Normas Substitutas da ISO 294-5:2011
ISO 294-5:2017
ICS/CIN
83.080.20 - Materiais termoplásticos
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