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Molds for the Production of Multilayer Bent Glass

The design and the processing quality of the mold have a vital impact on the quality of the bent glass. The mold for the laminated bent glass should be available in a variety of styles and the different forms of the curvature. Different molds are chosen according to the specific bending requirements. 
Molds for the Production of Multilayer Bent Glass
(1) Bent glass with a small curvature
For bent glass with a small curvature, non-adjustable hollow frame fixed mold made of stainless steel flat iron can be used. It is made depending on the shape and curvature of the glass. It is simple to make. The intermediate hollow part of the glass is supported with springs or aluminum bars. It is only suitable to the production of bent glass with a small curvature and the curvature of the glass cannot be fine-tuned with the mold. 
 
In order to fine-tune the curvature of the bent glass, frames are supported with adjustable bolts. In the actual production process, according to the error of the curvature of the glass, the curvature can be fine-tuned with the adjustable bolts. 
 
(2) Unilateral bent glass without forming a spherical surface 
Unilateral bent glass, if molded in a hollow mold, will form a spherical surface in the intermediate part when reaching the plastic temperature. In order to avoid such defects, you can select the grille mold. 
 
A grille mold is a mold between the solid mold and the hollow mold. Compared to the solid mold, it is easy to make and has lower requirements on the bending operation. The mold is made of square steel. This mold can guarantee the curvature of glass without forming a spherical surface and has lower requirements on the operators. But it is costly and takes too much time to make. During the bending process, it absorbs too much heat and the temperature of glass rises slowly, resulting in optical defects such as pitting. 
 
(3) Bent glass with large arc on both sides
Hollow frame molds with large arc on both sides can be used to produce bent glass with large arc on both sides. This mold is made on the basis of hollow frame fixed molds. It is opened on both sides of the curved region. After opened, both sides can be rotated. When putting the glass into the mold, the two sides are opened and the glass is placed flatly on the mold. The intermediate part of the glass is supported with springs or aluminum bars. 
 
The mold adopts the split structure. A hook is welded on one end of the opening of the mold. A hanging jaw is welded on the other end of the mold. During use, the mold frame welded with the jaw is put on the hook and can be rotated. The thickness of the hook should be consistent with the thickness of the mold frame. The height of the hook should refer to the width of the flat iron of the mold frame. The depth of the groove is 1.5mm. But if the groove is too deep, it is not conducive to the opening and rotating of the hanging jaw. 
 
(4) Bent glass with large arc in the middle part 
This type of bent glass can be made in a hollow frame mold with an opening in the center. The mold can be stretched and flatten. Then glass can be placed on it. Upon heating, the glass is deformed and the mold recovers its original state under its own gravity force, so that the glass achieves the desired curvature with the mold.
 
The bending process of multilayer glass is a relatively complicated process. To obtain high-quality bending laminated glass, depending on the product, select the appropriate production equipment, heating technology and mold. 

Glass mould brick produced by Zhengzhou Sunrise Refractory is another choice for the molding of curved glass. it has low permanent linear change on reheating, high dense structure and good thermal shock stability and is easy to be machined. Glass Mould Brick has been used in thermal bending glass, thermal melting glass and art glass. We sincerely welcome the comments from all our customers.
 
 
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