27 8月 Liquid Aluminum filter
Liquid Aluminum filter
It’s very important to choose and design Liquid Aluminum filter model & filter seat correctly according to casting types and pouring weight.
The general principle is that the whole gating system should be a system without pressure to ensure that the molten metal liquid filling mould smoothly.
Ratio of the sectional area will be the main point.
Liquid Aluminum filter Advantages
Removal of inclusions makes the metal more fluid, resulting in easier mold fill, better cast structure, and better thin section castability.
Reduced Mold and Die Wear
Removal of inclusions and other nonmetallic debris from the melt reduces die soldering and mold-metal interaction, which degrades the mold surface and service life.
Longer Tool Life
Oxide as well as intermetallic inclusions create “hard spots” that damage tools in machining and finishing operations. Ceramic Foam Filter reduces tool wear and increases productivity.
While adding the filter print to the mould plate, the filter seat has to be sized correctly to prevent filter breakage while casting.
It is recommended to have a filter size of approx.. 1/5” for filters up to 3×2”, filters up to 4×4” need 1/3“ of filter seat while filters larger than 4×4” need approx. filter seat.
Filters up to 4×4” can be positioned vertically or horizontally inside of the mould/runner, larger filters should be positioned horizontally only.
It is not recommended to position the filter at the bottom of the downsprue, as the risk of filter breakage is significantly increased.
When ceramic foam filters are used, it is recommended to use a “pressure-free” casting system, to prevent re-oxidation of the molten Aluminum while casting.