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发明公开
CN108136637A 用于形成眼科镜片的系统、模具和方法 审中-实审

用于形成眼科镜片的系统、模具和方法
摘要：
所披露的实施例包括一种用于形成具有低光学缺陷风险的眼科镜片的系统、模具(200)以及方法。说明性注射成型系统包括热浇道以及流体地联接到所述热浇道的热流道。所述系统还包括流体地联接到所述热流道以接纳熔融材料的模具。所述模具包括材料管道(204)和镜片腔体(202)，所述材料管道可以包括在可互换的浇口嵌入件中。所述热流道形成了材料管道，所述材料管道具有用于接纳来自所述热流道的材料的入口(206)和用于将材料递送到所述镜片腔体的出口(208)。所述材料管道还包括布置在所述入口与所述出口之间以用于接纳被转向的体积的经降解镜片材料的分支腔体(210)。
摘要（英）：

The disclosed embodiments include a system, apparatus and method for forming an ophthalmic lens having reduced risk of optical defects. An illustrative injection molding system includes a heated sprue and a hot runner fluidly coupled to the heated sprue. The system also includes a mold fluidly coupled to the heated runner to receive a molten material. The mold includes a material conduit, which may be included in an interchangeable gate insert, and a lens cavity. The hot runner forms a material conduit having an inlet for receiving material from the hot runner and an outlet for delivering material to the lens cavity. The material conduit also includes a branch cavity disposed between the inlet and the outlet for receiving a diverted volume of degraded lens material.

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