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  • Writer's pictureMark YAN

How to Installation Foam Foundry Filter?

Updated: Aug 9, 2021

  • The placement of ceramic foam filter should be as close as possible to the casting to obtain the max. filtration efficiency and flow adjustment;

  • The foundry filter is usually placed in the runner, sometimes at the bottom of the sprue(not recommended).

Installation diagram of the filter:

Principle of Use:

  1. The closer the placement position is to the casting cavity, the better, which reduces the probability of secondary oxidation;

  2. The design of the gating systme should be simple, and other slag retaining measures can be ignored, which can improve the utilization rate of the sand mold cand the production rate of process;

  3. The working area of the filter should be 2 to 4 times the blcoking cross section of the pouring system to ensure that the pouring speed is not affected;

  4. Select the proper filter according to the type of casting alloy and the pouring temperature, and should not be used over temperature;

  5. Choose the right pore size to really achieve the filtering effect;

  6. Ceramic foundry filter can't be used to control the pouring speed;

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