Method of making railway truck bolsters

Details Method of making railway truck bolsters Method of making railway truck bolsters

1998-04-10

1999-09-21

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164369, B22D 3304

Patent

active

059541148

ABSTRACT:
Improvements in the method of making cast metal bolsters for railway trucks are disclosed. The bolster is cast in a mold using a one-piece center core. The center core has a first end inboard of the first outboard end of the mold and a second end inboard of the second outboard end of the mold. The one-piece center core extends from the first end across the center area of the mold to the second end. It has surfaces to define interior surfaces of the bolster top wall, bottom wall and side walls on both sides of the bolster central transverse plane and bolster central longitudinal plane. Two one-piece end cores are also used. Each one-piece end core has surfaces shaped to define the interior surfaces of the bolster top wall, bottom wall and side walls from a position inboard of one friction shoe pocket to the first outboard end of the bolster. Each has surfaces to define interior surfaces of the bolster top wall and bottom wall on both sides of the bolster central longitudinal plane and interior surfaces of the bolster side walls on both sides of the perpendicular bolster longitudinal plane.

REFERENCES:
patent: 5410968 (1995-05-01), Hawthorne et al.
patent: 5481986 (1996-01-01), Spencer et al.

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