A thermal vacuum forming method for 3D curved glass

Abstract

A thermal vacuum forming method for 3D curved glass is disclosed. The method includes putting a 2D glass panel into a mold the upper part of which is provided with a 3D curved surface pit and the bottom of which is provided with a special-structure open cavity used for adsorption; then heating the mold through a heating plate; when the glass is softened or close to a softened state as the glass isheated, vacuumizing a heating cavity from the lower part so as to form vacuum suction force for the 2D glass panel; then cooling the mold and the glass under maintained pressure in vacuum until the dimension of the glass is stable and does not change, thus finishing thermal vacuum forming of the 3D curved glass. The mold has evenly distributed air ports so that the vacuum suction force is uniformand the method is suitable for forming various complex curved surfaces. The mold is only on one side and the graphite mold is not melted with glass so that demolding is simple. The thermal vacuum suction temperature is higher than the hot pressing temperature, and the temperature of the glass is closer to the softening point so that the mold has little loss. The thermal vacuum suction is uniformand can achieve two-pit or multi-pit forming with one mold, thus obviously increasing the efficiency.

Description

technical field [0001] The invention belongs to the field of glass production, and in particular relates to a method for thermal absorption molding of 3D curved glass. Background technique [0002] 3D curved glass has the advantages of thinness, transparency and cleanness, anti-fingerprint, anti-glare, good weather resistance, etc. It can improve the novelty of the appearance of smart terminal products and better touch experience. Material has better signal reception. [0003] At present, the main molding method for 3D curved glass for smart terminals is to press the male and female molds together at an appropriate temperature (usually between the heat transfer point and softening point) through contact hot pressing to make the flat glass The 3D curved glass is manufactured by forming the substrate into the space between the master mold and the male mold. The size of the curved glass is guaranteed by the processing accuracy of the male mold and the female mold itself, the ...

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Problems solved by technology

[0004] The present invention provides a method for heat-absorbing forming of 3D curved glass, the purpose of which is to overcome the complex operation of the production process of 3D glass in the prior art, the low yield rate of hot-press forming using male and female molds, and relatively high mold loss. big problem

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