Method for molding hinged article
AssigneesNicholas Ferrari, Arthur H. Blumberg, Daniel C. Slavinsky
InventorNicholas Ferreri
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Abstract
A mold and method are provided for molding a pair of hinged articles in a single molding operation. Plastic melt is introduced into a mold containing cavities for a pair of hinge leaves, each of the leaf cavities is provided with a hinge cavity. A pin assembly containing a hollow outer pin and solid inner pin is shifted from a first position wherein the hollow pin engages one of the leaf cavities to a second position wherein the hollow pin clears the outer of the cavities. The hollow pin is vented past the solid pin.
Claims5
A method for molding a pair of hinged leaves in a single molding operation comprising the steps of:
- providing a pair of adjacent leaf cavities in a mold, each of said leaf cavities having at least one hinge cavity adjacent a hinge cavity of the other leaf cavity whereby to define inner and outer hinge cavities;
- providing a pin assembly comprising a hollow pin and a coaxial solid pin positioned within said hollow pin;
- said assembly being in line with said hinge cavities;
- and
- introducing plastic melt into said mold with said hollow pin in a first positin adjacent the inner hinge cavity;
- venting air from the mold through said hollow pin past said solid pin as plastic melt flows into said hollow pin;
- and
- shifting said pin assembly to a second position so that said outer pin clears said outer hinge cavity after said plastic melt has set.
Dependencies are inferred from the claim text.