Optical lenses are more and more widely used. They are developed according to the actual application requirements, from optical design modeling to manufacturing molding molds, and suitable lenses are obtained through injection molding. For example, Optical lens manufacturerthey are usually used in indoor and outdoor lighting and washing wall lamps, line lamps, stage lamps, industrial and mining Street lamp lenses, etc.
(1) : selection of raw materials for lens injection molding
As an optical grade product, in principle, we choose optical grade raw materials, such as Japan Mitsubishi PMMA, usually vh001. Optical grade PCs, such as Diren 1250. Of course, there are many brands of raw materials in the market, domestic and imported, Optical lens manufacturer which can be selected according to their own needs. Therefore, first of all, we must master the process characteristics of its raw materials:
The fluidity of PMMA (acrylic) is worse than PS and ABS, and the melt viscosity is sensitive to the change of temperature. In the molding process, Optical lens manufacturer the melt viscosity is mainly changed from the injection temperature. Drying temperature: 80-90 ℃, time: about 2-4 hours. Melt temperature: 210 ℃ - 270 ℃, depending on the data provided by the supplier. The mold temperature is 70-100 ℃, Optical lens manufacturer depending on the actual situation.
