Federal-mogul World Wide, Inc.

Federal-mogul Powertrain LLC

Other

Tenneco Gmbh

Timothy David Frank

Christopher Todd Shoptaw

David Edward Ramey

Kevin M O'Connor

Andrew John Miller

Kevin M O'CONNOR

Christopher T Shoptaw

An outer panel mold and method of constructing a piston and forming an undercut cooling gallery of a piston therewith is provided. The outer panel mold is operably attachable to a conventional piston mold machine. The outer panel mold has a pair of gudgeon core members and a pair of gudgeon guide blocks. The gudgeon core members are moveable toward and away from one another along an axis that is substantially perpendicular to a longitudinal central axis of a piston. Each of the gudgeon guide blocks have an opening receiving a separate one of the gudgeon core members. A pair of outer panels are moveable into a closed position between the pair of gudgeon guide blocks to form an undercut cooling gallery of the piston and an open position to allow extraction of the piston vertically along the longitudinal central axis in response to movement of the gudgeon guide blocks.

Piston outer panel mold and method of constructing a piston and forming an undercut cooling gallery of a piston therewith

A piston assembly is disclosed herein. The piston assembly is integrally formed and unitary and is centered on a central longitudinal axis. The piston assembly includes a head with ring belt having a plurality of ring grooves. The piston assembly also includes first and second skirts, each having a top edge and a bottom edge being radially narrower than the top edge. The skirts also include first and second side edges. The piston assembly also includes first and second pin bosses spaced radially inward from the ring belt to define a short-pin support arrangement. The pin bosses include respective first and second pin bores axially aligned on a pin bore axis perpendicular to the central longitudinal axis. The piston assembly also includes a plurality of panels, each extending between one of the pin bosses and one of the skirts. Each of the panels include a top portion spaced closest to the head and bottom portion spaced furthest the head and a middle portion disposed substantially equally spaced from the top and bottom portions. Each of the panels twists along its length such that a ratio defined by a first distance between the top portion and a first plane perpendicular to the pin bore axis over a second distance between the bottom portion and the first plane increases along at least part of the length.

Piston having twisted skirt panels

A mold assembly for forming a piston and method of molding a piston therewith includes a pair of mold halves moveable toward and away from one another along a linear path that is substantially perpendicular to a longitudinal central axis of the piston between an engaged position to provide at least a portion of a mold cavity for forming an outer periphery of the piston and a disengaged position to allow extraction of the piston from the mold cavity. The assembly also has a pair of cooling gallery mandrels moveable along a linear path into an engaged position between the pair of mold halves to form an undercut cooling gallery of the piston. The pair of cooling gallery mandrels are movable to a disengaged position to allow extraction of the piston vertically along the axis.

Piston mold assembly and method of constructing a piston therewith

A mold assembly for forming a piston and method of molding a piston therewith includes a pair of mold halves moveable toward and away form one another along a linear path that is substantially perpendicular to a longitudinal central axis of the piston between an engaged position to provide at least portion of a mold cavity for forming an outer periphery of the piston and a disengaged position to allow extraction of the piston from the mold cavity. The assembly also has a pair of mandrels moveable along a linear path into an engaged position between the pair of mold halves to form an undercut of the piston. The pair of mandrels are movable to a disengaged position to allow extraction of the piston vertically along the axis.

Growing community of inventors

Elkhart, IN, United States of America

Timothy David Frank