Let's see the core information from our Singapore client!

They ordered different mesh openings of fiberglass filter meshes to filter aluminum!

Now, they sent us the filtration process!

Everything is going smoothly with our filter mesh!

What is fiberglass filter mesh?

Fiberglass filter mesh is made of high temperature resistant fiber, woven and processed by special technology. There are kinds of products series with advanced technology and stable quality. 

Compared with other types of filters, Fiberglass filter mesh is cheap, easy to use, does not change the metal composition of the casting, has good slag filtering effect and low gas generation.

In addition, it also has high temperature resistance, ablation resistance, good chemical stability, resistance to metal melt erosion and good steel strength.

In casting production, steel castings, iron castings, aluminum castings and other alloy castings are prone to quality problems such as slag holes, sand holes and gas holes due to various reasons. Therefore, the removal of non-metallic inclusion in metal melt is of great technical and economic value to improve the yield of castings and the quality of castings.  

Fiberglass filter mesh is an ideal filter material for various metal melts. It can also be used for the filtration of chemical corrosive liquids and high temperature gases.

What is fiberglass filter mesh?

Fiberglass filter mesh is made of high-twist high-strength alkaline-free fiberglass yarn weaving through special treatment, the temperature can be up to 900℃, dedicated to aluminum liquid filtration, such as: used in automobile and motorcycle wheel, cylinder piston, aluminum rod, aluminum ingots, aluminum plate and aluminum alloy parts of the investment casting. It can effectively remove the bubbles in aluminum liquid, slag, etc., improve product quality.

Why is fiberglass filter mesh used for aluminum?

The liquid aluminum in contact with the air is easy to be oxidized, resulting in impurities such as oxide skin, and the quality requirements of aluminum castings are also very high, it can be a good solution to solve such problems that use fiberglass filter mesh.

Fiberglass filter mesh is suitable for all kinds of aluminum alloy casting, such as sand casting, mold, shell mold, drawing die, investment casting and other fields.

It can effectively remove impurities, eliminate bubbles, thereby improving casting quality and reducing production costs.

At the same time, fiberglass filter mesh does not pollute the aluminum liquid, does not affect the chemical properties of the metal, will not pollute the aluminum liquid, and reduce the cost.

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.