1. GOVERNMENT ENGINEERING COLLAGE DAHOD DEPARTMENT:- MECHANICAL ENGINEERING SUB:- Manufacturing Process 2 Topic :- Shaping And Forming Of Glass Prepared by:- guided by:- 160180119055 K. K. Bhatt

3. Process  Spinning  Pressing  Blowing Shaping Of Glass

4. 1. Spinning Spinning of funnel- shaped glass parts such as cathode ray tubes for television and computer monitors. 1) Gob of glass dropped into mold. 2) Rotating mold to spread molten glass on mold

5. 2. Pressing 1) Glass gob is fed into mold 2) Pressing into shape by plunger 3) Plunger is retracted and finished product is removed

6. 3. Blowing Blowing process: Blown air expands a hollow gob of heated glass against the inner walls of a mold. A parting agent ( such as oil or emulsion) is usually used to prevent the glass from sticking to the mold.

7. Process  Blow and Blow  press and Blow

8. 1. Blow and Blow  (1) gob is fed into mold cavity;(2) mold is covered;(3) first blow step;(4) partially piece is repositioned in second blow mold, and (5) blown to final shape

9. 2. Press and Blow  (1) molten gob is fed into mold cavity; (2) pressing to form a parison;(3) parison is transferred to blow mold, and (4) blown to final shape

10. Thank you