Mold for demolding contact lens and method thereof capable of fast demolding a contact lens by backward folding the mold cavity to effectively enhancing production efficiency of contact lens

• Main Authors: XIAO, XU-GUI, CHEN, ZHING, LIAO, XIAN-SHENG
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2020
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CONTACT LENSES; OPTICS; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention provides a mold for demolding a contact lens, comprising a first mold and a second mold. The first mold comprises a mold cavity that is recessed toward a first direction, a curved section extended outward from a periphery of the mold cavity, a first mounting part adjacent to the curved section, and a recessed section formed between the first mounting part and the curved section. The curved section has a wall thickness thinner than that of the mold cavity to be matched up with the recessed section and help the mold cavity to deform and folded backward. The second mold comprises a circular protrusion part protruded toward the mold cavity and a second mounting part adjacent to the circular protrusion part. The second mounting part and the first mounting part are formed with an assembling structure therebetween. As such, when the above-described mold is applied to demold a contact lens, it is easy to complete demolding through backward folding and thus deforming the mold cavity.