Production method of 3D curved lens

Abstract

The invention discloses a production method of a 3D curved lens. The production method comprises the following steps: a step of injection molding: a melt is injected in from one side of a die cavity, and when 10%-40% of the volume of the die cavity is filled with the melt, auxiliary gas is injected into the die cavity; a step of compression: when 45%-90% of the volume of the die cavity is filled with the melt, the auxiliary gas is exhausted, compression of the inside of the die cavity is started, and the 3D curved lens is obtained. A finally obtained 3D curved lens product can replace glass to serve as parts such as a screen, a back cover and the like of a 3C (computer, communication and consumer electronics) product, and can be applied to the fields of high-end smarkphones and tablet personal computers, wearable equipment, dash boards, industrial computers and the like.

Description

technical field [0001] The invention relates to a compression injection molding process, in particular to a manufacturing method of a 3D curved lens. Background technique [0002] At present, the production of 3D curved glass is processed by 3D forming glass technology. The 3D forming glass technology is to place the glass between the curved molds, heat it to 800°C to the edge of melting, and then press it into the curved mold to bend the glass. , through CNC engraving machining and polishing treatment, and then heat transfer decorative patterns for visual effect processing. The processing yield rate of 3D shaped glass is low, the overall yield rate is lower than 50%, and the production cannot reach mass production. For 3D shaped glass processing, the number of CNC engraving machines is in great demand, and the investment cost is high. The time for 3D forming glass is more than 40 minutes, and the processing efficiency is less than one-fifth of that of ordinary cover glass....

AI Technical Summary

Problems solved by technology

The processing yield rate of 3D shaped glass is low, the overall yield rate is lower than 50%, and the production cannot reach mass production. 3D shaped glass processing requires a large number of CNC engraving machines, and the investment cost is high. The time for 3D forming glass is more than 40 minutes, and the processing efficiency is less than one-fifth of that of ordinary cover glass

Transparent plastic is gradually replacing the dominant position of 3D curved glass. The product has the advantages of light and thin, transparent and clean, anti-fingerprint, anti-glare, hard, and scratch-resistant, but there is no process for molding 3D curved plastic lenses.

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