Anglicky v odborných předmětech "Support of teaching technical subjects in English “

1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Engineering technology Topic: Casting – basic definitions Prepared by: Ing. Elena Nová Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

2. Casting– basic definitions

3. Casting – basic definitions • Non permanent forms Permanent forms Netrvalé formy Trvalé formy

4. Casting – basic definitions • Non-permanent forms • Are made from silicon sand and binder. • After solidification of casting are disposed. • For manufacturing of non-permanent cast a mould is needed.

5. Casting – basic definitions • Mould- is made according to drawing of desired casting • Mould is bigger than final cast, due to its shrinkage at cooling down. • Longitudinal shrinkage of casts. • Grey iron1% • Steel 2 % • Alloys of Mg 1,2%

6. Casting – basic definitions • Moulds can be: • Permanent • Investment / Lost wax • Permanent can be used repeatedly. • Lost (wax) is melted and replaced by metal. • Permanent mold casting:

7. Casting – basic definitions • Creation of hollows

8. Casting – basic definitions • Permanent Mold Casting

9. Casting – basic definitions • Casting method - Investment / Lost wax model:

10. Explain following expressions: • Non-permanent mouldsAlloys • Permanent moulds Loss wax • Moulds • Core • Core box • Technical drawing • Casting • Grey iron • Silicon sand • Steel

11. Answer: • What is produced from silicon sand and binder? • For manufacturing of non-permanent form we need mould. How isit made? • Why is mould bigger than final product? • What is longitudinal cast shrinkage. • What mould types do you know? • Explain expression Investment / Lost wax

12. Used literature • MODERNÍ STROJÍRENSTVÍ PRO ŠKOLU A PRAXI, JOSEF DILLINGER A KOLEKTIV • WWW. WIKIPEDIA. CZ