Optical lens and injection molding mold thereof

Abstract

The invention provides an optical lens and an injection molding mold thereof. The injection molding mold of the optical lens comprises a disc-shaped mold seat and a nozzle. A mold cavity chamber and a sprue communicating with the mold cavity chamber are defined by the disc-shaped mold seat. The mold cavity chamber comprises an optical effective area center runner and a non-optical effective area circumferential runner. The optical effective area center runner is defined between an upper curved surface and a lower curved surface in the disc-shaped mold seat. The non-optical effective area circumferential runner surrounds and communicates to the optical effective area center runner and communicates with the sprue. A plurality of turbulent flow structures are formed at the positions, on the non-optical effective area circumferential runner, of the disc-shaped mold seat. The nozzle is connected to the disc-shaped mold seat. Melt is injected into the mold cavity chamber through the sprue. The flow speed of the melt on the non-optical effective area circumferential runner is disturbed by the multiple turbulent flow structures, the optical effective area center runner is preferentially filled with the melt, and therefore an optical effective area of the optical lens cannot be generated with defects so as to increase the yield of the optical lens.

Description

technical field [0001] The present invention relates to an injection molding mold and an optical lens for corresponding injection, in particular to an injection molding mold with high production yield and an excellent optical lens for corresponding injection. Background technique [0002] With the advancement of science and technology, it has gradually developed towards the process of miniaturization of objects. In addition to the smaller and smaller diameter requirements of optical lenses, there is also a requirement for thinner and thinner thickness, that is, optical lenses are moving toward miniaturization. develop. At the same time, due to the diversification of functions of electronic devices, the industry has begun to have situations and demands for mounting optical lenses on mobile electronic devices. For example, optical lenses and laser light sources are combined to form an application function of illuminating structured light. [0003] figure 1 It is a three-dim...

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Problems solved by technology

[0005] However, the channel height of the two ring sides of the cavity 15 of the conventional injection molding mold 1 is higher than the channel height of the central region of the cavity 15 of the conventional injection molding mold 1, and therefore the melt will be less resistant The ground flows through the sides of the two rings, so the flow velocity on the sides of the two rings will be faster than that in the central area, which will lead to Figure 4 Shows the flow of the melt in the chamber during lens manufacturing

However, its disadvantage is that before the melt 8 has completely filled the central area (that is, the optical effective area of ​​the lens), the melt 8 has already filled the two ring sides (that is, the non-optical effective area of ​​the lens), and when the final lens is formed , there will be voids or fusion lines 19 formed in the central area of ​​the lens (that is, the optically effective area of ​​the lens), which will seriously affect the optical performance of the lens

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