Sprue structure

Abstract

The invention provides a sprue structure for preventing turbulence of an optical silica gel condenser in vehicle lamp optics. The sprue structure is applied to an injection mold for injection moldingof the silica gel concentrator, a light-emergent face of the silica gel concentrator is arranged on the ground side of the injection mold, and a light-incident face of the silica gel concentrator is arranged on the sky side. The sprue structure is characterized in that the sprue structure comprises a sprue formed in the position, close to the ground side, of the side face of the injection mold. Inthis way, during gel injecting, sprinkling of the sprue can be avoided from bottom to top, because the viscosity of silica gel is very low, flowing of the silica gel is affected by the gravity duringinjection molding, and filling from bottom to top is more stable.

Description

technical field [0001] The invention belongs to the technical field of automobile lamp manufacturing, and in particular relates to a gate structure for preventing turbulent flow of optical silica gel concentrators in the optics of automobile lamps. Background technique [0002] Due to its good heat resistance and high optical transmittance, silica gel is more and more widely used in optics. Common silica gel concentrator structures are as follows: Figure 4 As shown, the silica gel concentrator has many concentrating heads and needle-like void structures. As an optical component, the appearance of the silicone concentrator is not allowed to have any defects such as bubbles, flashes, and ripples. The main reason for the ripples is that the gate design is unreasonable, which causes the silica gel to reflow after being heated and expanded during injection. [0003] At present, most of the silicone concentrators on the market choose point gates, and the gate positions are gener...

AI Technical Summary

Problems solved by technology

The main reason for the ripples is that the gate design is unreasonable, which causes the silica gel to reflow after being heated and expanded during injection.

[0003] At present, most of the silicone concentrators on the market choose point gates, and the gate positions are generally as follows: Figure 4 As shown in the gate 200 in the figure, this kind of point gate has several disadvantages: 1. There are residues in the gate on the optical surface, which affects the lighting effect; 2. Jetting problems are prone to occur at the gate; 3. A product Requires a cold runner needle valve, increasing mold manufacturing cost

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