Flow Defect Recognization & Control

You will get the answer for following questions.

1. What are the die casting surface defect?
2. Which is more important for good casting surface finish, the alloy or the metal pressure?
3. What will happen if metal temperature is too high?
4. Does the gate velocity of metal influence the die temperature?
5. What is the minimum temperature for aluminum to get very good surface finish?
6. What happen if die spray time and the casting cycle time are both increased?
7. What change can be made to correct cold flow defects?
8. When other things remain same but gate area reduced, what happen to plunger tip?
9. What happen when the gate size, the plunger size, and the hydraulic pressure are all increased?
10. When the plunger diameter is decreased, what happen to fill time?
11. What happen when the vents in a die are filled with flash?
12. Is it true or false that the die spray time, cycle time, and cooling water flow must all be controlled within set limits to produce cosistent quality casting.