Permeability is good or bad is an important indicator of the quality of silicon brick, but also determines the use of the deadline, so the manufacturing knowledge of this area to do a general understanding.
1, generally discussed in the permeability of silicon brick, it refers to the permeability of the coating, from the use of paint, sand the whole dynamic system to consider, the permeability of the coating is only part of the entire system.
2, changes in the type of sand, shape and temperature, whether the vacuum, foam model performance changes will lead to the whole system of silicone permeability changes, and thus change the flow behavior.
3, in practice, sometimes silicon brick by changing the permeability of the coating to compensate for changes in other process parameters caused by the entire system of gas permeability changes, but simply change the permeability of the coating sometimes not enough Compensates for changes in the permeability of the entire system.
Whether the silicon brick is breathable can be considered from many aspects, to meet the requirements of breath ability can be widely used to avoid causing significant losses.
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