Injection molding process for molding mechanical interlocks between molded components

An injection molded part formed from at least two materials comprising:

• (a) a first portion formed from a first injection molded material, the first portion having a base portion and a sidewall, the sidewall extending from the base, the sidewall having an inner surface, an outer surface, and a top surface, the sidewall extending upwardly and outwardly from the base such that the distance between opposing sides of the sidewall at the base is smaller than the distance between the opposing sides of the sidewall at the top surface, the inner surface positioned adjacent to an inner recess of the first portion, at least a portion of the inner surface having an interfacial surface, at least one interlock cavity formed within the sidewall and adjacent to the interfacial surface, the at least one interlock cavity having a first opening at the inner surface and a second opening at the outer surface, the at least one interlock cavity also being asymmetrical about a centerline that is perpendicular to the sidewall and that extends through a center point of the first opening;
• and
• (b) a second portion formed from a second injection molded material disposed within at least a portion of the inner recess, the second portion configured to be in contact with the interfacial surface and extends into the at least one interlock cavity, the at least one cavity configured to provide a mechanical interlock between the first portion and the second portion that prevents the first and second portions from being separated.