Feasibility study of rapid prototyping using the uniform droplet spray process
Name
42086301-MIT.pdf
Description
Full printable version
Size
1.44 MB
Format
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Checksum (MD5)
a5092c0becfa66ff9e94fc890fcea95e
Author(s)
Shin, Jennifer Hyunjong, 1974-
Advisor(s)
Jung-Hoon Chun.
Date Issued
1998
Publisher
Massachusetts Institute of Technology
Abstract
This work studied the feasibility of rapid prototyping using the Uniform Droplet
Spray (UDS) process. Straight and stable liquid metal jets are crucial requirements in the
application of UDS to rapid prototyping. Methods to maintain the jet straight and stable
were developed. Hardware improvements include an auxiliary orifice mounting fixture and
a new crucible bottom with a tightly-fitting orifice-pocket. A droplet trajectory controller,
including deflection plates and a pulse provider to a charging plate, was developed to
precisely deliver droplets for deposition. The degree of separation between deflected and
undetected streams of droplets was modeled and the prediction was compared with
experimental results. This comparison revealed that the degree of actual deflection was
approximately twice as high as the predicted value. Using the trajectory controller,
deposition was conducted using pure tin (Sn) with droplet impact conditions of velocity
and liquid fraction of 45 m/s and 97%, respectively. The deposition frequency was
varied in the experiment to study its effects on deposit shapes. A low frequency deposition
at 57Hz produced a vertical pillar, whereas a high frequency deposition at 574Hz resulted
in a large drop.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
Includes bibliographical references (leaf 29).
Subjects
Mechanical Engineering
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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