CUP LID MANUFACTURING METHOD WHICH USES A CUP LID FORMING MOLD AND A FORMING MOLD FOR IMPROVING THE EFFICIENCY OF INJECTION MOLDING

摘要

PURPOSE: A cup lid manufacturing method which uses a cup lid forming mold and a forming mold are provided to combine a male mold and a female mold, to fill a gap with a mold cavity by injected plastic material, and to rapidly emit the air with the mold cavity.;CONSTITUTION: A male mold(1) includes a protrusion unit(11), an edge unit(12), and a first air path(13). A gap(14) is formed between the protrusion unit and the edge unit. The first air path penetrates the gap and an external space. When the male mold is combined with a female mold, the protrusion unit and the edge unit are located within a depressed unit(21). The mold cavity and the second air path are formed between the male mold and the female mold. The second air path penetrates the mold cavity and the external space.;COPYRIGHT KIPO 2013