Method and apparatus for molding magnetic tape cassette

摘要

A method and apparatus for molding casing halves of a magnetic tape cassette in which one or more-windows in the casing half are firmly retained by remaining portions thereof regardless of the solubility of the two plastic materials employed or other molding conditions. The window is formed with a projecting edge portion which extends well into the plastic of the remaining portions of the casing half. In one embodiment, the window is molded first and then the remaining portions are molded around the edge portions of the window. In another embodiment, the other portions are molded first using slidable cores to define the window portions, and then the windows are molded.