As a filter equipment often used in industrial production, fiberglass cap filter plays an important role in metal smelting industry. 

It can effectively remove impurities, reduce turbulence and eliminate air bubbles, thereby improving the quality of castings and reducing costs. 

At the same time does not pollute the aluminum liquid and affect the chemical properties of the metal. 

Therefore, aluminum waste containing the filter mesh, aluminum liquid from sprue and the riser can be directly returned to the furnace for remelting, greatly reducing costs.

Cap Filter Mesh Features and Functions:

● Carbonized by High Temperature.

● Coated with special resin.

● Smokeless & Odorless & Flameless.

● With one or two staple or not, up to clients' need.

● Effectively remove impurities, reduce turbulence and eliminate air bubbles from molten aluminium.

●  Improving the quality of castings and reducing costs.

● The aluminium filtered by this mesh can be recycled again.

●  It is environment-friendly products.

●  All shapes can be customized according to clients' requirements.

For some castings that require high surface quality and good densification, in order to prevent inclusions and improve the internal quality of the castings, it is very necessary to install a cap type fiberglass filter mesh in the gate system. Especially in the field of small and medium-sized castings such as automobiles, high-speed railways, machine tools and hydraulic parts, the purification effect of the cap filter mesh has been widely recognized by most foundry workers.

Purification mechanism of cap type fiberglass filter mesh:

1. Since the cap fiberglass filter mesh is placed at the bottom of the gate of the sprue cup, runner or sand mold, the molten metal injected from the sprue cup into the cavity can stay momentarily while passing through the position. The slag can be the main small-density inclusions floating and separating from the molten metal. These inclusions also produce deep adsorption when they pass through regular or irregular grids. This phenomenon can continue to purify molten metal before the pouring cup is filled.

2. The role of surface filtration: Surface filtration is a common metal liquid purification function of all casting filters. When the molten metal passes through the casting filter, unfloated or floating inclusions with a relatively large surface area, such as molten slag, are captured by the surface of the casting filter. In addition, the captured inclusions will form a finer filter eye with the cast filter continue trapping subsequent inclusions, thus enhancing the filtration effect. However, at the same time of this surface filtration, with the decrease of the pouring temperature and the increase of the viscosity of the molten metal, as well as the extension of the pouring time, the cap filter mesh will be blocked to varying degrees, thus make filtering effect be worse.

So, the cap filter mesh should be replaced with a new one according to actual casting scenario to keep its best filtering effect.

Production process of fiberglass cap filter

Hot press set shape    &    Side cut trimming

Cangchen is a professional foundry filtration products manufacturer who focuses on production, sales, service and solutions. If you want to know more about our Cap Filter Mesh price, we are online 24 hours a day and welcome your consultation.