A thermal vacuum forming method for 3D curved glass

A curved glass, 3D technology, applied in glass forming, glass remolding, glass manufacturing equipment, etc., can solve the problems of low yield of male mold and female mold hot pressing, large mold loss, complicated operation, etc. The effect of convenient polishing, small loss and simple operation

Inactive Publication Date: 2019-11-01
湖南三兴精密工业股份有限公司
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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 th...

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  • A thermal vacuum forming method for 3D curved glass
  • A thermal vacuum forming method for 3D curved glass
  • A thermal vacuum forming method for 3D curved glass

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] The method for thermal absorption molding of 3D curved glass according to the present invention is to place the 2D glass plate 11 in the mold 8 with a 3D curved surface pit 12 on the top and an open cavity with a special structure for adsorption at the bottom; The plate heats the mold; when the glass is heated and softened or close to softening, the cavity A13 formed by the 2D glass plate and the 3D curved surface pit in the mold and the bottom of the mold are opened by vacuuming the heating cavity from below. The lower cavity B14 formed on the upper surface of the heating plate is evacuated for a specified time; then the mold and glass are cooled under vacuum pressure until the size of the glass is stable and no longer changes, that is, the heat absorption molding of 3D curved glass is completed.

[0034] The specific process includes the follow...

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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 ...

Claims

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Application Information

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IPC IPC(8): C03B23/035
CPCC03B23/0357
Inventor 彭富国刘光映
Owner 湖南三兴精密工业股份有限公司
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