Masters Theses

Author

Harish Jose

Keywords and Phrases

Ice patterns; Solid molding (Founding)

Abstract

"This thesis focuses on the development and implementation of the investment casting process using ice patterns. The traditional method of the investment casting process involves using wax patterns. Wax patterns tend to expand during the dewaxing process, and this causes stress on the shell wall which can eventually lead to the breaking of the wall. Ice patterns on the other hand shrink when heated. This is a very desirable property for the investment casting process. The process of dewaxing (dewatering) of ice patterns can be achieved by keeping the shells at room temperature, instead of heating the shell in an oven as in the autoclaving process for wax patterns. This makes the process environmentally benign than using wax patterns.

The first step in the research was to develop a solid mold method of investment casting. The choice of materials used for making the ceramic molds was difficult since the working environment of the process was well below the freezing point of water. A solid mold investment casting process was developed for ice patterns, and a detailed study of the process capability was done. Ten M08 bolt castings were produced, and the outer diameter and pitch data were collected. The process was successful in reproducing the minute details of the bolt pattern.

A shell method for the investment casting process using ice patterns was then developed by doing more studies at the O’Fallon Casting foundry in Missouri. M12 bolt castings were produced by this method to measure the process capability. The shell method of investment casting using ice patterns was more flexible in terms of size of the castings and productivity"--Abstract, page iv.

Advisor(s)

Richards, Von

Committee Member(s)

Kohser, Ronald A.
Raper, Stephen A.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Manufacturing Engineering

Comments

The author gratefully acknowledges the financial support from the National Science Foundation grants (DMI-0128313, DMI-0140625 and DMI-0321712).

Publisher

University of Missouri--Rolla

Publication Date

Summer 2005

Journal article titles appearing in thesis/dissertation

  • Solid Mold Investment Casting Process using Ice Patterns
  • Shell Mold Investment Casting Process using Ice Patterns

Pagination

x, 48 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2005 Harish Jose, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Precision casting
Founding
Molding materials
Shell molding (Founding)

Thesis Number

T 8751

Print OCLC #

62865704

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://merlin.lib.umsystem.edu/record=b5463457~S5

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