초록 ▼

Tooling for forming an article which includes an injection molded peripheral frame defining an opening closed by a panel insert. The panel insert is struck from sheet material and together with an associated punch or carrier cooperated with a split mold to completely define the cavity for injection

Tooling for forming an article which includes an injection molded peripheral frame defining an opening closed by a panel insert. The panel insert is struck from sheet material and together with an associated punch or carrier cooperated with a split mold to completely define the cavity for injection molding of the article. Inasmuch as the panel insert is heat bondable to the injection molded frame and forms a portion of the walls of the cavity, it is automatically bonded to the injection molded frame. The panel insert may be peelable from the frame and include a pull tab for effecting the same. The pull tab may be formed by the same punch which cuts out the panel insert, or the pull tab may be separately formed from sheet material adjacent an intended position of a panel insert and folded into overlying relation to the intended position of the panel insert and staked to the sheet material, after which the panel insert is cut from the sheet material by a punch. The pull tab is initially connected to the sheet material along an elongated fold line, after which not all of the pull tab connected to the sheet material is removed by the punch so as to define a centrally located pull tab which is aligned with the projecting part of the punch to effect a completely sealed mold cavity utilizing the panel insert with a previously formed and folded over pull tab staked thereto.

대표청구항 ▼

Apparatus for forming an injection molded frame having a panel insert, said apparatus comprising a mold including first and second axially adjacent mold members, means for supporting a material strip in axial alignment with said mold members, and a punch for punching a panel insert from such materia

Apparatus for forming an injection molded frame having a panel insert, said apparatus comprising a mold including first and second axially adjacent mold members, means for supporting a material strip in axial alignment with said mold members, and a punch for punching a panel insert from such material strip and moving said panel insert into position engaging one of said mold members and forming part of said mold; wherein said first and second mold members are mounted for axial separation and define a split mold; and wherein there is a transverse parting line between said first and second mold members, said first mold member is on one side of said parting line and said second mold member is on an opposite side of said parting line, and said first mold member being formed in two parts including an inner part and an outer part arranged in telescoped relation.