Insert apparatus for a mold, method of manufacturing a structural unit, method of retrofitting an existing mold and a structural unit

摘要

Disclosed is an insert apparatus for a mold for manufacturing structural units. The insert apparatus includes a carrier for operatively engaging a portion of the mold, and is in communication with a face or an object having an engagement design portion thereon. The face is in operative communication with the carrier, and the engagement design portion extends into or out of the cavity of the mold. Methods of manufacturing such a structural unit, methods of retrofitting an existing mold for manufacturing such a unit and novel and improved structural units are also disclosed.