An injection moulding apparatus and method for producing a moulded article is disclosed herein. In a described embodiment, the method comprises: (i) securing a layer of film to a part of a first mould half at step 504; (ii) adjusting relative position of the first mould component and a second mould component to an initial moulding position at step 506 to define a mould cavity; (iii) injecting molten moulding material into the mould cavity at step 508 to enable the molten moulding material to contact the layer of protective film; (iv) moving a movable core at step 510 to compress the molten moulding material in the mould cavity; and (v) cooling the compressed molten moulding material at step 514 to bond the layer of film to the cooled moulding material to form the moulded article.

A cast mould for manufacturing a contact lens or an intraocular lens, wherein the cast mould is provided with a central part and a bearing ring and a flexible connection between the central part and the bearing ring. Further, an injection mould is provided for manufacturing such a cast mould and a method for manufacturing such a cast mould. The injection mould is provided with a mould cavity with a plunger biased by spring means towards the mould cavity which serves for compensating shrinkage which occurs during the curing of the plastic injected into the injection mould. Also described is a method for manufacturing a contact lens or intraocular lens with the aid of the cast mould, as well as a contact lens or intraocular lens obtained with this method.

A cast mold for manufacturing a contact lens or an intraocular lens, wherein the cast mold is provided with a central part and a bearing ring and a flexible connection between the central part and the bearing ring. Further, an injection mold is provided for manufacturing such a cast mold and a method for manufacturing such a cast mold. The injection mold is provided with a mold cavity with a plunger biased by a spring towards the mold cavity which serves for compensating shrinkage which occurs during the curing of the plastic injected into the injection mold. Also described is a method for manufacturing a contact lens or intraocular lens with the aid of the cast mold, as well as a contact lens or intraocular lens obtained with this method.

A multi-mold block drive device includes a guide seat having a plurality of spaced-apart guide holes extending through inner and outer peripheral surfaces thereof, a plurality of speed reduction drive units each including a speed reducer driven by a servo motor and having an eccentric shaft, and a plurality of mold locking units each connected between one of the guide holes and a corresponding speed reduction drive unit. Each mold locking unit includes a pivot shaft, a linkage disposed between the pivot shaft and the corresponding guide hole, and a guide rod pivoted to the linkage. The linkage includes a crank driven by the eccentric shaft, a first link arm pivoted between the crank and the pivot shaft, and a second link arm pivoted between the crank and the guide rod. An injection molding machine having the multi-mold block drive device is also disclosed.

A molding apparatus is proposed for manufacturing a molded component. The molding apparatus may include an upper half mold and a lower half mold cooperatively coupled with each other. A mold cavity is defined between the upper half mold and the lower half mold. The molding apparatus further includes one or more compressing channels formed in the lower half mold and in fluid communication with the mold cavity; and one or more compressing rods, wherein each of the one or more compressing rods is slidably received in a respective one of the one or more compressing channels, wherein a top surface of each of the one or more compressing rods defines a compressing recess within the respective one of the one or more compressing channels.