Abstract: An apparatus for injection molding wherein melt is conveyed to a gate in fluid communication with at least one mold cavity comprises a nozzle for conveying melt, the nozzle having an inlet for admitting melt, at least one outlet for directing melt to mold cavities and received within a recess of the gate, a nozzle body having a passage therethrough for conveying melt from the inlet to the outlet, and at least one split ring seal received in a groove in the exterior of the nozzle body so as to be displaceable relative to the associated groove, the split ring seal having an outside perimeter for contacting the surface of the recess of a gate, the split ring seals maintaining separation of the periphery of the nozzle body from the surface of the recess with the outlet positioned within the recess. Each split ring seal advantageously comprises overlapping end segments abuttingly engaged with the outlet positioned within the recess.

Abstract: A mold assembly for a molding machine having an ejector device member operatively engagable with ejector device elements of the mold assembly comprises a subassembly for retaining a mold component, the sub-assembly having an opening therein wherein a movable ejector assembly comprising at least one ejector pin is contained and comprising a mounting plate for mounting the sub-assembly to the molding machine, the mounting plate having an opening therein open to the periphery of the mounting plate at one edge thereof for providing clearance for the molding machine ejector device member; a collar being open to one side and having a capture cavity comprising the opening therein; and a capture element for operative engagement with the collar, wherein one of the movable ejector assembly and the molding machine ejector device member comprises the collar and the other comprises the capture element.

Abstract: A mold assembly comprises a sub-assembly for retaining a mold component, the sub-assembly having an ejector box being open to a side of the sub-assembly accessible through an opening of a molding machine as the sub-assembly is mounted in the molding machine, a cover movably mounted to the sub-assembly on the exposed side thereof to be movable between an open position providing access to the interior of the ejector box and a closed position substantially covering the ejector box; and at least one fastener attached to one of the cover and sub-assembly for releasably retaining the cover in the closed position. The mold assembly advantageously comprises a hinge having a fixed element attached to the sub-assembly and a rotatable element attached to the cover, whereby the cover is rotatable between the open position and the closed position.