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Approximate Operating Temperatures for MF80 Antimony Lead -1% Sb
Lead Pot: 850°/900°F, 454°/482°
Feedline: 900°/950°F, 482°/510°C
Ladle: 900°/1000°F, 482°/533°C
Mold Gate: 390°/440°F, 199°/227°C
Upper Mold: 400°/450°F, 204°/232°C
Lower Mold: 400°/450°F, 204°/232°
Mold Coolant Oil 180° F
1. Mold Spray Procedure - Spray Procedure should be similar to calcium casting.
a. Spray 1/2 of total cork on mold
b. Wipe frame and lug
c. Scrape surface
d. Spray 1/2 of total cork on surface
NOTE: After casting a few grids wipe cork from areas that show cracks. Type of cork X-400 or X-500.
2. Pot Change Over
The lead pot must be completely empty and cleaned out before changing from a 2-3/4% Sb lead alloy to a 1% Sb (MF80) alloy. This is important because the 1% alloy (MF80) does not use the same grain refiners as the 2-3/4% alloy.
3. General Notes:
a. It is desirable to run the mold temperatures as close to one setting as possible.
Example:
Gate 410°
Upper Mold 410°
Lower Mold 410°
b. If cracks are in grid they can be caused by the mold being too cold or too hot. Try heating the mold up and see if cracks go away. This must be done a few degrees at a time. The temperature range the mold will run at is narrow.
Example:
1. Grid mold temperature below 400° - Cracks
2. Grid mold temperature between 400° - 415° - No Cracks
3. Grid mold temperature above 415° - Cracks
If you have any more questions or problems please contact us.
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