Method and system for manufacturing railcar coupler locks

A rail car and coupler technology, applied in the direction of manufacturing tools, molding machines, casting and molding equipment, etc., can solve problems such as shortcomings

Inactive Publication Date: 2014-01-01
BEDLOE IND LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] While green sand has been effective in making locks for many years, the process has some drawbacks

Method used

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  • Method and system for manufacturing railcar coupler locks
  • Method and system for manufacturing railcar coupler locks
  • Method and system for manufacturing railcar coupler locks

Examples

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Embodiment Construction

[0024] The following examples describe methods for making multiple locks in a single casting operation. Usually made into a set of shell shapes that define the shape of the lock. The shell type is a casting mold made of relatively expensive refined silica sand mixed with thermosetting phenolic resin. Refined silica sand allows the lock to have a smooth surface finish and relatively high dimensional accuracy compared to locks manufactured by other casting processes.

[0025] However, current shell production technology optimizes existing size shell machines and results in relatively small shells. Whereas the larger shell machines that exist tend to be very expensive. When technically feasible, it would be very expensive to increase the size of the shell to withstand the large discharge pressures required. Thus, the shell mold is put into the outer mold. The outer mold is made of less costly natural hardening or no-bake sand molding material and is configured to receive the ...

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Abstract

A casting assembly for manufacturing a lock of a railcar coupler includes drag and cope portions of a first mold that defines exterior surfaces of the lock, wherein the first mold comprises a first molding material. The casting assembly also includes a second mold formed of a second molding material. The second mold defines a cavity with an interior surface that substantially complements an exterior surface of the first mold. A down sprue is formed in the second mold. A gating system is formed in the second mold that and is in fluid communication with the down sprue. An in-gate is formed in the second mold and is in fluid communication with the gating system and the first mold.

Description

Background technique [0001] Rail car couplers are used to connect rail cars together. Typical couplers commonly used in North America are E or F couplers. These couplers incorporate a lock that interacts with the knuckle of the coupler to lock the knuckle into the closed position. Typically, the lock fits within a lock cavity in the knuckle body and overlies the knuckle tail. The width of the lock is sized to slide within the lock cavity. [0002] The locks used in this type of coupler are usually made by casting. The most common technique used to manufacture locks is by sand casting. Sand casting is used to manufacture complex shapes with low cost and high output. In a typical sand casting process, a mold is formed by filling molding sand around a pattern, which generally defines a casting system through which molten metal flows. The pattern is then removed from the mold, forming a cavity in the shape of the cast piece, corresponding to the final casting. Cores, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/00
CPCB22C9/02B22C7/00B22C9/00B22D25/02B22C9/08B22C9/22B22C15/24B61G3/06
Inventor F.·安德鲁·尼鲍尔杰里·R.·斯梅雷茨基凯利·S.·戴尼克·萨拉玛西克
Owner BEDLOE IND LLC
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