How to use fiberglass filter mesh in aluminium filtration

In recent years, the quality requirements of various aluminum processing products are getting higher and higher.

To improve product quality, the first is to improve the castings quality.

The aluminum liquid purification process adopted in the past could not remove the suspended matter and non-metallic inclusions in the molten aluminum, so that would deteriorate the structure of the casting.

Now, more and more foundry factories are choosing our fiberglass filter mesh to filter aluminium, which can effectively filter out the inclusions in liquid aluminum and achieve good results.

How to use our fiberglass filter mesh in aluminium filtration?

1. First of all, Choose the placement position of fiberglass filter mesh: 

There are three main placement positions:

● one is placed at the top of the sprue under the sprue cup, 

● the second is placed at the lap of the cross sprue, 

● and the third is placed at the corner contact between the cross sprue and the inner sprue.

2. Place filter mesh on the parting surface:  

There are two placing ways,

● one is horizontal placement, also can be said to be parallel placement, the filter is placed horizontally under the crossmouth cup or parting surface, the casting height should not exceed 20 cm, the metal liquid is washed at the intersection cup wall, not directly to the filter mesh; 

● The other is vertical placement.

3. The filter mesh is placed on the top, and the bending surface should be kept upward and flattened from the center to the four sides. At the same time, the filter mesh can not have wrinkles.

4. After aluminum is melted in the smelter, it will be slagged and degassed until it meets the casting requirements, and then it can be out of smelter. The general temperature when coming out is 720℃~730℃. The qualified aluminum liquid is filtered through the flow tank and then poured into the semi-continuous casting crystallizer.

5. In order to ensure that the aluminum melt has sufficient fluidity, the temperature of the liquid aluminum is usually appropriately increased by 3 to 5 ° C (compared with the unfiltered), and the temperature is generally controlled above 680 ° C, but it can not be too high.

6. The aluminum liquid should have a certain initial pressure to ensure that the aluminum melt smoothly passes through fiberglass filter mesh, and the initial pressure is 100 to 150 mm.

Hebei Cangchen, a professional manufacturer of such fiberglass filter mesh, we have our own registered trademark: "CANGENDAS", but also we have OEM service for all customers from the world. We are a professional factory with ISO certificate and our fiberglass filter mesh has been SDS and MSDS(USA) certificate.