Sprue structure

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. 本发明提供了一种车灯光学中防止光学硅胶聚光器湍流的浇口结构。该浇口结构，应用在用于注塑硅胶聚光器的注塑模具中，硅胶聚光器的出光面设置在注塑模具的地侧并且其入光面设置在天侧，其特征在于：浇口结构包括设置在注塑模具的侧面上且靠近地侧的位置的浇口。这样在射胶时，浇口由下而上可避免花洒，而且由于硅胶粘度非常低，注塑时其流动受重