What is TF Combo Bag?

TF Combo Bag is also named Fiberglass Thermal Formed Combo bag, which is weaved by special high-twist & high-strength alkali-free fiberglass yarn, coated with phenolic resin, special post-treatment and suitable "carbonized" by high temperature.

Features:

● New environmental protection material, does not burn during whole use process , no harm to human body.

● Advanced production equipment, warp and weft standard for base cloth, high temperature resistant coating mesh uniform, the finished product is exquisitely made without burrs.

● Both sides of the bag adopt square hole fixing device technology, more convenient operation and improve the working rate.

What is manufacturing process of of TF Combo Bag?

TF Combo Bag is produced by Fiberglass Filter Cloth that weaved by special high-twist & high-strength alkali-free fiberglass yarn. There are more than 50 sets weaving machines to produce such cloth.

Then all bags are sewing and cuttin by hand.

Fixing Models   &   Sewing Bags

What is application of TF Combo Bag?

● Apply to filter and evenly distribute molten aluminum in molds.

● Used in sand casting, permanent mold, shell mold, draw mold and investment casting.

●Apply to filter large diameter aluminum ingot and billet, rectangular aluminium slab, and aluminum-alloy casting parts.

Use Instructions:

● The closer the placement position is to the casting cavity, the better effect is, the better reducing the probability of secondary oxidation. The location where the casting filter is usually placed in the gating system: the lower end of sprue, the runner, the inner runner, and the sprue cup. 

● The design of the gating system should be simple, and other slag blocking measures may not be considered, which can improve the utilization rate of the sand mold and the yield of the process. 

● The aluminium liquid pouring speed cannot be controlled with an TF Combo Bag. 

● The working area of fiberglass filter diversion bag should be 4 times to 6 times to the blocking section of the pouring system to ensure that the pouring speed is not affected. 

● Select the corresponding filtration products according to the type of casting alloy and pouring temperature, and it should not be used at excessive temperature. 

● Select the filter screen with the appropriate aperture to truly achieve the filtering effect.

What are the functions of TF Combo Bags?

This bag can improve the mechanical properties of aluminum castings, increase the hardness of the castings and the surface hardness is uniform and improve the bending strength of the castings. 

Compared with other kinds of filters, TF Combo Bag has the advantages of low price, convenient use, no change of metal composition, good filter slag and low gas output withstand higher temperature and more suitable for high temperature precision casting production.

In this way, the manufacturer can produce terminal products with assured quality.

Functions:

● Helps to reduce the turbulence of metal flow and improve the temperature distribution throughout the mold volume.

● Filter the molten metal and decrease in non-metallic inclusions and oxide films in the liquid metal. 

● Ensure the removal of oxides or other debris suspended in the volume.

● Filter molten metal and decrease in non-metallic inclusions and oxide films in liquid metal.

● Remove the harmful impurities such as bubbles, ash oxides, and various inclusions in aluminum molten liquid.

● Greatly improve the yield of aluminum castings, improve the quality of aluminum products.

● Avoid the problem of other metal components into aluminum solution.

● Does not affect the composition of aluminum alloy.

● Improve mechanical quality of aluminum casting product.

● Improve the temperature distribution of molten metal and control flow of aluminium vertical direct.

● Improve the hardness of aluminum casting product with more average surface hard and bending strength.

● Improve the hardness of aluminum casting product with more average surface hard and bending strength.

● Improve working environment, bags will be producing very little smoke, fumes or flame when molten aluminium flow inside, but it is harmless, no any affect to staff.

What are the purposes of usage of such bags?

The first one: The aluminum liquid is divided to two ends of ingot through the bags, this process will determines the temperature distribution around crystallizer device. And the metallographic structure of the cured aluminum alloy ingot will be affected by the temperature distribution.

The second purpose: is to keep and leave the oxide in the bag, reduce the aluminium liquid flow and filter out all the large particles that mainly include alumina, chloride and titanium, boron, magnesium oxide and large resistant material shed.

TF Combo bag is one of process in contact with aluminum liquid in casting foundry, so it is quite important. It is the key to achieve the casting quality standards of aluminum and aluminum alloy flat ingot if bags and skimming ring are used together.

What is the dimension of this bag used for alumium casting filtration?

Usually out dimensions: 13" x 5"x 6", mesh openning is 2.5x2.5mm.

But all dimensions and mesh opening can be made to your own need, just need your drawings, pictures or samples!

What are certifications of such bags in Hebei Cangchen?

Hebei Cangchen, a professional manufacturer of such TF Combo Bags, 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 bags has been certified by MSDS(USA).