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Ceramic Glass Mould Vs. Metal Glass Mould

The compound curved glass products used in the automobile industry promotes the development of the glass moulding technology. Accurate glass mould brick is very important for the accurate geometry of the glass. Besides metal glass mould, now ceramic glass mould is also used for the moulding of glass. 
Ceramic Glass Mould Vs. Metal Glass Mould
In production of the curved glass, the bending mould is usually made of metal. The mold is generally comprised of two parts, so that it can be opened and the finished product inside removed safely. When adopting the vaccum shaping method, the mould is more complex. In this situation, hundreds of holes will be dig on the mould to help accurate shaping. 
 
The trend in the automobile glass industry is to increase the surface area of the glass and decrease its thickness. When producing think glass, the mould needs to be heated to the accurate temperature. This requires the glass mould to have many components, which makes the process of the mould more complex and time-consuming. 
 
Since the metal mould is difficult to process, other materials are considered as alternatives to metal. Ceramic material is the preferred material. Compared to metal, ceramic glass mould has the following features: 
1)it can accurately repeat the geometry and can cast three-dimension glass geometry with cheap materials, because it has no shrinkage. 
2)It has smooth surface and can be used without polishing process. 
3)During the bending temperature range, it has stable size and low expansion coefficient. In the same situation, the metal mould may destroy the shape of glass due to expansion. 
4)Reduce the transportation time and fees. 
5)It does not require complex process like the metal mould. 
6)Since it has good integrity, it has lower requirement for the operation than the metal mould. 
7)It has good resistance to oxidization and wear. It is a permanent mould. 
 
Due to the above features, ceramic glass mould brick is ideal the mass production of automobile glass. 
 
Pre:Glass Mould Brick for Rearview Mirrors Next:How To Choose The Glass Mould For Heat Bending Glass
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