Method and apparatus for forming multi-colored cap part of snap button

A method for forming a multi-colored cap part of snap button, comprising the steps of:

• forming a design portion of said cap part of snap button using a first group of molds, which including a first female mold, a first male mold, and a plate-shaped middle mold, and a slide-plate mold adapted to movably assembled to said first male mold, said first male mold having a first pair of guide channels slidably engaging the slide-plate mold, and said slide-plate mold including a plurality of mold cavities for forming said design portion;
• removing said slide-plate mold from said first male mold of said first group of molds when said design portion has been formed in said slide-plate mold through a first injection molding;
• movably positioning said slide-plate mold removed from said first male mold into a second female mold included in a second group of molds for forming a body portion of said cap part of snap button;
• said second female mold having a second pair of guide channels slidably engaging the slide-plate mold, said second group of molds also including a second male mold;
• positioning a post for said cap part of snap button in said second male mold of said second group of molds;
• and
• forming said body portion of said cap part of snap button using said second group of molds through a second injection molding, so that said design portion formed through said first injection molding is associated with said body portion in said second injection molding to produce a molded finished product of said cap part of snap button.