OPTICAL LENS AND INJECTION MOLD THEREOF

摘要

An injection mold and an optical lens produced from the injection mold are provided. The injection mold includes a disk-type mold base and a nozzle. A mold cavity chamber is defined by the disk-type mold base. The mold cavity chamber includes an optically effective central runner and an optically ineffective annular runner. Moreover, plural spoiler structures are formed in the optically ineffective annular runner. While a melt is injected from the nozzle to the mold cavity chamber, the plural spoiler structures provide the functions of disturbing the melt flow and decreasing the velocity of the melt in the optically ineffective annular runner. Consequently, before the optically ineffective annular runner is completely filled with the melt, the optically effective central runner is completely filled with the melt. Since no defect is formed in an optically effective zone, the yield of the optical lens is enhanced.

主权项

1. An injection mold for receiving a melt and producing an optical lens, the injection mold comprising:
a disk-type mold base, wherein a mold cavity chamber and a gate are defined by the disk-type mold base, and the gate is in communication with the mold cavity chamber, wherein the mold cavity chamber comprises:
an optically effective central runner arranged between a top curved surface and a bottom curved surface within the disk-type mold base, so that an outer contour of the optical lens matches the top curved surface and the bottom curved surface; andan optically ineffective annular runner arranged around the optically effective central runner, wherein the optically ineffective annular runner is in communication with the optically effective central runner and the gate, wherein the disk-type mold base comprises plural spoiler structures in the optically ineffective annular runner, at least one nozzle connected with the disk-type mold base, wherein the melt is injected from the at least one nozzle into the mold cavity chamber through the gate, wherein the plural spoiler structures disturb flow of the melt, so that the optically effective central runner is completely filled with the melt before the optically ineffective annular runner is completely filled with the melt.