초록 ▼

The complete, two-color, multiple keybutton array of a keyboard is molded by a two-shot injection molding method which uses a rotating, double female die means selectively cooperating with two male dies. The finished keybutton array is ejected to a carrier which then cooperates with a gathering fixt

The complete, two-color, multiple keybutton array of a keyboard is molded by a two-shot injection molding method which uses a rotating, double female die means selectively cooperating with two male dies. The finished keybutton array is ejected to a carrier which then cooperates with a gathering fixture, which fixture is then movably adjusted to place the keybuttons in position for assembly to the keyboard.

대표청구항 ▼

A two-material injection molding method for forming a molded part whose outer surface comprises an image formed of material A, surrounded by a shell of material B, the method comprising the steps of: providing two female dies, said first female die providing the exterior shape of said molded part in

A two-material injection molding method for forming a molded part whose outer surface comprises an image formed of material A, surrounded by a shell of material B, the method comprising the steps of: providing two female dies, said first female die providing the exterior shape of said molded part including a void defining said image, and said second female die accepting said part\s exterior shape without obstructing said voids; mating said first female die with a first male die and injection molding said material B, to thereby form a material B shell of said molded part, including a void in the shape of said image; separating said first female die from said first male die, while leaving the material B shell of said molded part on said first male die; mating said second female die with said first male die while said first male die supports said material B shell; applying a force between said second female die and the part\s material B shell to thereby retain the material B shell within said second female die, as said first male die is separated therefrom; mating said second female die with a second male die which is similar in size than said first male die, to thereby define a cavity between said second male die and the interior surface of said material B shell; and injection molding the cavity thus formed with material A, to thereby form a finished part.