Details Title: Injection Molding Material Description: Describe at least five basic materials in injection molding Total Flash Cards: 15 Created: 07/14/2009 10:35:15		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Mechanical Engineering Flashcards
Cards in this set: Term Acetal Definition Naturally opaque/white and very tough Gears, bearings, taps & aerosol valves Term Acrylic Definition Transparent, brittle Lenses, car light housings and reflectors Term ABS Definition Natural, opaque and very tough Telephone handsets, vacuum cleaner housings Term Nylon Definition Almost opaque or white and very tough Bushes, bearings, curtain runners Term Polycarbonate Definition Transparent, very tough Safety shields and helmets. Car headlights, DVD Term LDPE Definition Natural waxy appearance, flexible Kitchenware, sealing lids & closures Term HDPE Definition Natural waxy appearance, tough & stiff Milk crates Term Polypropylene Definition Natural waxy appearance, tough & stiff Beer crates, automotive battery housings Term GP Polystyrene Definition Transparent & brittle CD Jewel cases Term HI Polystyrene Definition Natural translucent & tough Toys Term PVC (U) Definition Transparent to opaque, tough & rigid Window frames, plumbing fittings Term PVC (P) Definition Transparent to opaque, tough & flexible Shoe soles, inflatables Term SAN Definition Transparent & brittle Kitchenware, instrument housings Term Company specific Definition Vectra: glass filled, liquid crystal polymer with low shrinkage and warp as well as fast cycle times; a good material for small thin walled parts such as connectors and high temperature assembly applications Valox: a PBT with low shrinkage, but slightly higher than vectra; a good material for small parts such as connectors and low temperature assembly applications Questra: a blend of polystyrene and nylon with similar shrinkage as valox; used for valve covers, electronic housings, and automotive connectors Term Give two examples of materials that must be dried before use and explain what could happen if not fully dried Definition Any two materials from the following: Nylon, Polycarbonate, ABS, Acrylic, PBT, PET, PPO Any two effects from the following: Froth/bubbling, poor surface finish, Material degradation, strength of molding reduced