Injection overmolding with heat/cool cycling for making optical lenses using 3D-printed functional wafers

US12186999B2 · kind B2 · utility

Assignee

• Essilor International · FR

Inventors

• Haifeng Shan · Dallas, US
• Aref Jallouli · Midland, US
• Hao-Wen Chiu · Palm Harbor, US

Key dates

• Filing date: Jul 1, 2020
• Grant date: Jan 7, 2025
• Expiry date: Dec 27, 2040

Classification

• Technology area (CPC —): General

Abstract

Disclosed herein is an injection molding method for making optical thermoplastic lenses using 3D—printed functional wafers. The method employs a variable injection molding cavity temperature that is heated to at least wafer Tg—10° C.