Taillight product material ABS or PC + ABS, usually need to be plated with aluminum. Most of the products of taillight housing are complicated in structure. There are usually multiple reflective bowls on the front. It needs aluminum plating, which requires high requirements. There are mounting points on the reverse side, sealing ribs and features. More and more, resulting in more tail mold shell mold inserts, most of the features can not be achieved by normal demoulding, slider, internal pumping, inclined top and other mechanical mechanisms are widely used.