Description
Extruded Batt is a common type of high-temperature-resistant kiln furniture, usually made by semi-dry pressing method, but it can also be made by die-casting method. Its main materials include:
Cordierite mullite: This material makes the hollow shed panels have significant energy-saving effect, can withstand high temperatures and is not easy to bend and deform, and has a large heat dissipation area.
Polypropylene (PP): In some cases, hollow shed panels may also be made of polypropylene. This material determines that the hollow shed panels have non-toxic, pollution-free, corrosion-resistant, waterproof, and shock-proof properties.
Par exemple, cordierite mullite is usually used for hollow shed panels used in ceramic shuttle kilns, tunnel kilns, and roller kilns, while polypropylene or other plastic materials may be used for hollow shed panels used in other fields.
Extruded Batt
Performance characteristics of Extruded Batt
Mechanical properties
Compared with ordinary sheds, the weight of hollow sheds is reduced by about 35% – 50%, and the load-bearing capacity of the board surface is greatly increased. Par exemple, the weight per unit area of a 38mm thick hollow shed is equivalent to that of a 23mm thick ordinary shed, but the load-bearing capacity of the board surface is 5 times that of the latter5.
It is not easy to bend and deform at high temperatures. The 1200mm long hollow shed is supported by silicon carbide beams. It will hardly deform during use, and can ensure the flatness of large-sized microcrystalline glass plates
Thermal properties
The results show that when hollow sheds are used to burn microcrystalline glass plates in shuttle kilns, fuel consumption can be reduced by at least 30%, and up to about 70%5.
The heat dissipation area of the same board surface is more than twice that of ordinary sheds, so it has better resistance to rapid cooling and heating, long service life, and can adapt to the rapid firing of ceramic products5.
Dimensional parameters of extruded hollow batt
Comparison of semi-dry pressing method VS die casting method in making Extruded Batts
| Semi-dry pressing | Die Casting | |
| Material properties | The semi-dry pressing method usually uses semi-dry materials, which have certain plasticity and fluidity and are suitable for molding products with complex shapes. | Die casting usually uses molten metal materials, which fill the mold under high pressure and become solid after cooling. |
| Process | The method involves placing semi-dry material into a mould and then shaping it by applying pressure. This method is suitable for hollow structure sheds as it ensures that the material is evenly distributed, reducing internal stress and deformation. | This method involves injecting molten metal into a mold, filling the entire mold cavity with high pressure, and then cooling and solidifying. This method is suitable for making metal products with complex shapes and high precision. |
| advantage | It has obvious energy-saving effect, is resistant to high temperature, not easy to bend or deform, and has a large heat dissipation area. | It can produce products with complex shapes and high precision, has high production efficiency, and can realize automated production. |
| shortcoming | – | Defects such as pores, shrinkage holes, and thermal cracks may occur, and secondary processing may be required to complete some structures that cannot be completed by casting. |
| Domaines d'application | It is mainly used in ceramic shuttle kilns, tunnel kilns, roller kilns and other fields, and is used for firing sanitary ware, electrical ceramics, powder metallurgy, stone, pottery, porcelain, bone china and other industries. | It is widely used in the manufacture of various metal products, such as automotive parts, electronic product casings, small metal devices, etc.. |
Main uses of extruded batts
Extruded batts are mainly used in ceramic shuttle kilns, tunnel kilns, roller kilns, and are used to burn sanitary ware, electrical ceramics, powder metallurgy, stone, pottery, porcelain, bone china and other industries.
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