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AssigneeAMSTED Industries Incorporated
InventorsThomas R. Callahan, Brian A. Toussaint, Anthony J. Bauer, Edward R. Hanson, Charles Moehling, Ronald R. Evers, Donald J. Lane, Delbert E. Parrish
Estimating the term…
Improvements in cast metal sideframes and bolsters for railway trucks are disclosed, along with improvements in the processes of casting such products and the cores used in the casting process. In one aspect, the cores are consolidated to provide two one-piece end cores, a one-piece center core, and a bottom center core for the sideframe and two one-piece end cores and a center core for the bolster. The consolidated cores may include cores to define various bolt holes. In another aspect, various cores may be made with step joints for interlocking support without weight-supporting chaplets. In another aspect, a locator boss may be formed on one or more of the cores for proper positioning of the core on the drag mold. Other improvements disclosed include providing a radial draft on the casting surrounding a bolt hole at a core parting or joint line so that nuts and washers may be evenly loaded. In the bolster interior, ribs may be straightened. In another aspect, core prints are used to support the cores on the drag mold surface. The core prints are connected to the core body through necks or bridges that define holes in the cast metal piece. The juncture of the core print and drag mold are spaced from a perimeter of the neck so that any metal fin formed at this juncture is on the exterior of the casting.
In a method of making hollow cast metal sideframes for railway cars, the sideframe having front and rear ends and pedestals at each end for mounting the sideframe on wheelsets, a top member extending along a longitudinal axis between the front and rear ends, a tension member having a bottom center portion and a pair of diagonal portions extending from the bottom center portion toward the pedestals, a bolster opening in the middle of the sideframe between the top member and the bottom center portion of the tension member, a pair of vertical columns extending on both sides of the bolster opening from the top member toward the tension member, and a spring seat at the bottom center portion of the tension member for holding a spring set to support a bolster received in the bolster opening, a pair of side windows between each column and the end of the sideframe, each side window being between the top member and one of the diagonal portions of the tension member, the method comprising the steps of providing a core to define the hollow interior of the sideframe, providing a mold with cope and drag portions and cope and drag mold surfaces defining a mold cavity, placing the core in the mold cavity, pouring molten metal into the mold to form a sideframe casting, removing the casting from the mold, and separating the casting from the core, the improvement wherein the core comprises:
In a method of making a cast metal sideframe for a railway car truck, the sideframe being of the type having front and rear ends and pedestals at each end for mounting on wheelsets, a top member extending along a longitudinal axis between the front and rear ends, a tension member having a bottom center portion and a pair of diagonal portions extending from the bottom center portion toward the pedestals, a bolster opening in the middle of the sideframe between the top member and the bottom center portion of the tension member, a pair of vertical columns extending on both sides of the bolster opening from the top member toward the tension member, and a spring seat attached to the bottom center portion of the tension member for holding a spring set to support a bolster received in the bolster opening, a pair of side windows between each column and the end of the sideframe, each side window being between the top member and one of the diagonal portions of the tension member, the method comprising the steps of providing cores to define the interior of the sideframe, providing a mold with cope and drag surfaces defining a cavity, the cope and drag surfaces being shaped to form the exterior surfaces of the sideframe, placing the cores in the mold cavity, pouring molten metal into the mold to form a casting, removing the casting from the mold, and separating the casting from the core,
In a method of making a hollow cast metal sideframe for use in a railway car truck of the type having two sideframes supported on wheelsets with a bolster extending between the sideframes, the sideframe being of the type having front and rear ends and pedestals at each end for mounting on wheelsets, a top member extending along a longitudinal axis between the front and rear ends, a tension member having a bottom center portion and a pair of diagonal portions extending from the bottom center portion toward the pedestals, a bolster opening in the middle of the sideframe between the top member and the bottom center portion of the tension member, a pair of vertical columns extending on both sides of the bolster opening from the top member toward the tension member, and a spring seat attached to the bottom center portion of the tension member for holding a spring set to support a bolster received in the bolster opening, a pair of side windows between each column and the end of the sideframe, each side window being between the top member and one of the diagonal portions of the tension member, the method comprising the steps of providing cores to define the interior of the sideframe, providing a mold for making the sideframe with cope and drag surfaces defining a cavity, placing the cores in the cavity, pouring molten metal into the mold to form the casting, removing the cast sideframe from the mold, and separating the cast sideframe from the cores, the improvement wherein the cores comprise:
In a method of making a hollow cast metal body comprising the steps of:
In a method for making a hollow cast metal bolster for a railway car truck, the bolster being of the type having a center, two outboard ends, a top surface and side walls with a plurality of spaced holes along the side walls, the spaced holes having overall lengths and widths, the method comprising the steps of providing a mold having a mold surface defining a mold cavity, the mold surface corresponding in shape with the shape of the exterior of the bolster, providing cores to define the interior of the bolster, placing the cores in the mold cavity, pouring molten metal into the mold to form the cast metal bolster, removing the cast metal bolster from the mold, and separating the cast metal bolster from the cores, the improvement wherein one of the cores comprises a one-piece center core including a center core body to be received in the mold cavity for defining the interior surface of part of the bolster, the center core body having a longitudinal axis and outer surfaces to define the interior surfaces of the bolster sidewalls, a pair of center core prints integral with the center core body for supporting the center core body in the mold, a neck connecting each center core print to the center core body, each neck corresponding in size, shape and position with a hole to be produced in the sidewall of the bolster, there being a neck for each of the holes to be made in each sidewall of the bolster, the center core and center core prints having overall lengths sufficient to span across the widths of all of the necks on one side of the center core body, the center core prints having heights sufficient to span across the heights of all of the necks on one side of the center core body;
In a method of making a hollow cast bolster for use in a railway car truck, the bolster being of the type having a center, two outboard ends, a top surface and side walls with a plurality of spaced holes along the sidewalls, the spaced holes having overall lengths and widths, the method comprising providing a mold having a mold surface defining a mold cavity for forming the exterior surface of the bolster, providing a plurality of cores to define the interior of the bolster, placing the cores in the mold, pouring molten metal in the mold to cast the bolster, removing the cast bolster from the mold, and separating the cast bolster from the core, the improvement wherein the cores include:
In a method of making a hollow cast metal sideframe for a railway car track, the sideframe having front and rear ends and pedestals at each end for mounting on wheelsets, a top member extending alone a longitudinal axis between the front and rear ends, a tension member having a bottom center portion and a pair of diagonal portions extending from the bottom center portion toward the pedestals, a bolster opening in the middle of the sideframe between the top member and the bottom center portion of the tension member, a pair of vertical columns extending on both sides of the bolster opening, a side window between each column and each end of the sideframe, each side window being between the top member and one of the diagonal portions of the tension member, the method comprising the steps of providing a mold for producing the cast metal sideframe, the mold having cope and drag mold surfaces defining a mold cavity, providing a core to be received in the mold cavity and including a core outer surface for forming a part of the inner surface of the cast metal sideframe, placing the core on the drag mold surface, pouring molten metal into the mold to form the cast metal sideframe, removing the cast metal sideframe from the mold, and separating the cast metal side frame from the core, the improvement wherein the top member of the sidefrane has a plurality of lightener openings and the core comprises a one-piece end core including:
In a method of making a cast metal sideframe for a railway car truck, the sideframe having front and rear ends and pedestals at each end for mounting on wheelsets, a top member extending along a longitudinal axis between the front and rear ends, a tension member having a bottom center portion and a pair of diagonal portions extending from the bottom center portion toward the pedestals, a bolster opening in the middle of the sideframe between the top member and the bottom center portion of the tension member, a pair of vertical columns extending on both sides of the bolster opening, a pair of side windows between each column and each end of the sideframe, each side window being between the top member and one of the diagonal portions of the tension member, the method comprising the steps of providing a mold having mold surfaces defining a mold cavity, providing a core to be received in the mold cavity, the core having a core outer surface for forming a part of the inner surface of the cast metal sideframe, placing the core in the mold cavity, pouring molten metal into the mold to form the cast metal sideframe, and separating the cast metal sideframe from the core, the improvement wherein the top member of the sideframe has a plurality of lightener openings and the core comprises a one-piece end core including a core print extending outwardly from the core outer surface and corresponding with one lightener opening, the core print having a core print body received in a mating cavity in the mold, the core print having a neck connecting the core outer surface and the core print body, the core print body having an edge meeting the mold surface and the neck having a perimeter inward of the core print body edge.
In a method of making a hollow cast metal bolster for a railway car truck, the bolster being of the type having a center, two outboard ends, a top surface and sidewalls with a plurality of spaced holes along the sidewalls, the spaced holes having overall lengths and widths, the method comprising the steps of providing a mold having mold surfaces defining a mold cavity, providing a core to be received in the mold cavity, the core having a core outer surface for forming a part of the inner surface of the cast metal bolster, placing the core in the mold cavity, pouring molten metal into the mold to form the cast metal bolster, and separating the cast metal bolster from the core, the improvement wherein the core includes a core print extending outwardly from the core outer surface, the core print having a core print body received in a mating cavity in the mold, the core print having a neck connecting the core outer surface and the core print body, the core print body having an edge meeting the mold surface and the neck having a perimeter inward of the core print body edge, wherein the core is a one-piece center core for the bolster, with one neck corresponding with each hole in the sidewall of the bolster.
Dependencies are inferred from the claim text.