Production Process

　 　1. Mold Matching and Mold Cleaning

　　According to the customer's requirements for product model, specifications, and brightness, externally sourced and imported molds are matched as A and B molds in the mold warehouse and framed for the next step.

　　The first step in production is to clean the molds in the cleaning machine.

　　(1) Stains or residues on the molds may affect their performance;

　　(2) Regular cleaning can prevent damage caused by accumulated dirt, thereby extending the mold's service life;

　　(3) Foreign substances adhering to the molds during use may affect the quality of the finished product. Cleaning ensures product quality and maintains customer trust.

　　 2. Mold Closing

　　To produce different lenses, raw materials need to be injected into different molds. First, clear and qualified molds are assembled with tape according to the production plan. The assembled molds must meet quality requirements of being free from water, oil, and dust. Before assembly, each mold is blown with an air gun to remove surface dust and inspected under light for defects before being placed into the taping machine for operation.

Operating the mold closing taping machine

　　 3. Raw Material Pouring

　　The prepared raw material, which has undergone pre-polymerization to reach a certain viscosity, is manually injected through the sealing ring injection hole into the assembled molds.

　　Controlling the pouring process and checking the mold's sealing require frontline production staff to operate and inspect. Although the operation seems simple, every detail must be handled carefully, emphasizing the principle of 'practice makes perfect.'

Pouring in progress

　　 4. Curing

　　After raw material pouring, the lens forming process called primary curing begins. The poured molds are sent to the curing oven, where lenses of different specifications are heated according to different curing curves (time-temperature curves) and control programs. After 21.3 hours of curing, the viscous material monomers polymerize into transparent solids.

Curing equipment

　　In different seasons, considering varying temperature and humidity, professional technical engineers fine-tune the machines to ensure lenses form normally and orderly. Generally, substrates are heated in the curing oven for about 21.3 hours to form, while semi-finished lenses require longer times.

　　 5. Mold Opening

　　After primary curing, the semi-finished product has molds on both sides, with an oven exit temperature of 90 degrees Celsius. The transparent resin lens in the middle is sent to the release platform and separated using specific tools. The separated molds are recycled and sent to cleaning equipment for cleaning and reuse.

　 　6. Lens Edging

　　The lens after mold opening undergoes edging work:

　　After separating the lens from the mold, trimming is performed. Generally, the lens diameter is about 4mm larger than the required size. The trimmed lens edges are smooth, facilitating later processing. The lens surface after edging contains unreacted raw material monomers and powder from grinding, which are cleaned using an ultrasonic cleaning machine.

Lens edging

　 　7. Lens Cleaning

　　The lens surface after edging contains unreacted raw material monomers and solid powder from grinding. It must be placed in an ultrasonic cleaning tank with a solution of certain purity for cleaning; otherwise, it will affect the next processing step of the lens.

　　 8. Substrate Inspection and Packaging for Storage

　　The lens after secondary curing is called a 'substrate.' Before storage, the substrate must be inspected for center thickness and refractive power accuracy, and checked for impurities, scratches, bubbles, watermarks, and other quality issues. Qualified substrates are classified, packaged, and stored as required. The substrate inspection process has very standardized lens inspection criteria, including refractive power, diameter, surface defects, etc. Staff inspect the lenses for quality issues while cleaning the lens surface with special lens cleaning paper to make the lenses brighter and cleaner.