2. 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.

3. Casting – basic definitions

4. Netrvalé formyTrvalé formy  Non permanent forms Permanent forms

5.  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.

6.  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 iron 1%  Steel 2 %  Alloys of Mg 1,2%

7.  Moulds can be:  Permanent  Investment / Lost wax  Permanent can be used repeatedly.  Lost (wax) is melted and replaced by metal.  Permanent mold casting:

8.  Creation of hollows

9.  Permanent Mold Casting

10.  Casting method - Investment / Lost wax model:

11.  Non-permanent mouldsAlloys  Permanent moulds Loss wax  Moulds  Core  Core box  Technical drawing  Casting  Grey iron  Silicon sand  Steel

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

13.  MODERNÍ STROJÍRENSTVÍ PRO ŠKOLU A PRAXI, JOSEF DILLINGER A KOLEKTIV  WWW. WIKIPEDIA. CZ