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12 Cards in this Set

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Hoe reageert een materiaal op de uitoefening van krachten?
De meeste mechanische eigenschappen hebben betrekking op elas4sch of plas4sch gedrag
– Destruc4eve materiaalbeproeving is nodig.
– Voorbeelden: Elas4citeit [s4jfeid], Treksterkte, Druksterkte, Buigsterkte, Hardheid, Kruip, Brosheid, Taaiheid, Vermoeiing, Vervormbaarheid Plas4sche vervorming of Elas4sche vervorming
toepassen van kunststof
Reden van veelvuldige toepassing: – Prijs (laag tov andere bouwmaterialen) – Verkrijgbaarheid
– Eigenschappen (veel verschillende)
– Verwerkings-mogelijkheden
– Kwaliteit (levensduur kan ook nadeel zijn) – Uiterlijk
– Reden om het niet toe te passen: milieuaspecten! – (SES edupack)
kunststof productie technieken
• Spuitgieten, injec4on moulding
• Spuitgietblazen, injec4on blow moulding • Extruderen, extrusion
• Extrusieblazen, extrusion blow moulding • Vacuumvormen, thermoforming
Spuitgieten of injec4on moulding machine
Begrippen spuitgieten
Machines
– opspanmaten
– sluitkracht – shot-volume
• Soorten matrijzen
– materiaal [staal, aluminium,(dus geen kunststof!)] – voudigheid
• Aanspuitpunt
• Lossing + open-dicht matrijs • Deelnaad
• Schuiven
• Uitstoten
• Textuur
Spuitgietblazen
Wat is extructie?
Extrusion en pultrusion
Extrusie is na spuitgieten het meest voorkomende vormgevingsproces voor polymere materialen.
folie, draad, platen, buizen en profielen
Typen extrusie?
twee materialen: kunststof / aluminium twee soorten: con4nu / discon4nu
.
discontinu exstrusie
discontinu exstrusie
.
extrusion blow moulding
Kunststof_Vacuümvormen