METHOD OF MOLDING RIGID PLASTIC MEMBERS HAVING A TEAR ELEMENT

摘要

A method for forming a plastic member from a rigid plastic, the member having first and second sections secured together by a tear line, wherein first (35) and second (37) supplies of plastic material are simultaneously injected into first (13) and second (19) mold cavities which have a constricted cavity (25) therebetween, so as to cause flow into the constricted cavity (25) from opposite directions by both supplies of plastic (35, 37) with the supplies of plastic materials coalescing in the constricted cavity (25) to form the tear line. Preferably, the method is used to form a lid for a container, the lid having a planar member with rupturable portion which is attached thereto by means of a tear line.