A Brief Discussion on Cast Moulding Technology


Moulding is described as the technique of manufacturing by carving liquid or flexible raw substances via a mold or matrix, which has been designed by utilising a pattern or model of the final object. But, casting means an entire manufacturing process in which molten metal is inoculated or discharged into a mold to form an object of a projected shape. Cast moulding technology has assisted in producing several life-changing things such as Cast moulding contact lenses. It incorporatess depositing a treatable mixture of polymerizable monomers in a mold cavity created by two mold sections, treating the monomer mixture, and stripping the mold assembly and exteriminating the lens.

This invention equips with a technique for cast-moulding hydrogel contact lenses, especially silicone hydrogel contact lenses by including plastic molds of a poly (cycloalkylene-dialkylene terephthalate) copolymer. These plastic molds do not need to be degassed and conserved in an oxygen-free atmosphere (e.g., N2 or Ar) before utilizing them for cast-moulding silicone hydrogel contact lenses in the absence of oxygen and subsequent silicone hydrogel lenses can still impart high ion relatively penetrability and moderately low variation in targeted optical power, when associated with silicone hydrogel lenses composed by utilising a conventional mold material, such as polypropylene. The invention also strives to offer plastic molds for cast-moulding silicone hydrogel contact lenses. Now, manufacturing contact lenses is no longer a daunting task.


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