CASTING PROBLEMS
BUBBLES
BUBBLES
Possible Fault Cause | Solution |
---|---|
Bad vacuum | Change oil in vacuum pump. Pump should be serviced on a regular basis. Check for leaks in vacuum pipes and chambers. Check mixing and pouring chamber are pulling equal vacuum levels. |
Dust on waxes or trees | Ensure once waxes or wax trees are made, they are stored in a dry, clean and dust-free atmosphere. Do NOT store waxes or trees in the same room that you weigh powder or invest in. |
Rough waxes | Ensure excessive talc or release agent is not used, as this will produce rough waxes and therefore rough castings. |
Under or over worked | Follow the recommended mixing instructions. |
Not vacuuming flasks after pouring | Ensure flasks are vacuumed for 1 minute after being poured. |