Method for making a retroreflective plate and a pin unit for making said retroreflective plate

Abstract

This invention primarily relates to a method for making a retroreflective plate including the steps of: (a) making a plurality of pin units by injection molding wherein the pin units substantially include a relatively thicker portion and a relatively thinner portion which is connected to the relatively thicker portion from the bottom thereof along the longitudinal direction of the pin units, the free end of the relatively thicker portion away from the relatively thinner portion forms a tapered portion; (b) placing the pin units on a base, wherein the base has a top surface and a plurality of recessions thereon such that the relatively thinner portion of the pin units can be put into at least some of the recessions for positioning; (c) producing a master negative die with the construction thereof complementary to the tapered portion of the arranged pin units; and (d) using the master negative die to form a retroreflective plate with the construction thereof complementary to that of the master negative die. This invention can significantly reduce the manufacture time and costs of the retroreflective plates. In addition, the retroreflective plates with different patterns and functions can be made in a more precise and convenient manner.

Dependencies are inferred from the claim text.