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The Principle of Using Reticulated Ceramic Foam Filter
2022-02-08

Placement of Reticulated Ceramic Foam Filter:

• Placed in pouring cup: more commonly used in close casting and iron mold sand casting.

• Placed at the bottom of the sprue: it is often used in the case where there is not much-molten iron poured in the whole box, especially for the pouring system where the sprue is located in the mold and there are multiple runner branches.

• Horizontally placed on the runner: the molten metal fills the mold smoothly, avoiding the direct impact of the molten metal on the filter. The slag blocking function of the upper half-shaped runner is well exerted, and the placement is convenient.

• Vertically placed on the runner: the flow rate of the molten metal is fast, and it has a good filling ability. The molten metal directly impacts the surface of the filter, and the impact resistance of the filter should be considered.

reticulated ceramic foam filter

Design of Filter Base or Card Slot:

It is necessary to fully consider the ease of placement of the filter (such as cone surface, slope, gap, etc.) and firmness and reliability. The support surface of the mold at the placement should have rounded corners (wiping edges) to prevent sand washing.
The molten iron inflow surface should have a support width of more than 5mm.
There are 1-1.5mm gaps and sand collecting grooves around the filter to prevent the scattered sand particles from accidentally falling into the mold when inserted.
The upper surface of the filter should be 0.5-1mm lower than the parting surface to prevent the sand mold from being crushed when the box is closed.

Usage Precautions of Reticulated Ceramic Foam Filter:

Silicon carbide ceramic sheets do not need to be preheated. The ceramic sheet is fragile, so it is necessary to avoid violent fall, drop and brutal operation during transportation and use; when taking the ceramic sheet out of the box, some fine slag may be generated due to bumping or scratching, so before putting it into the pouring system, use compressed air Blow and wipe all sides of the ceramic sheet, or turn over both sides by hand, and gently shake off the fine slag adhering to the surface.