A Piezo Sensor based Smart-Die Structure
John Moore, Brajendra Mishra, Jianliang Lin, and Sterling Myers
Summary: A piezoelectric thin film sensor that monitor the onset of failure during die casting
Description: Die-casting is an important metallurgical process that produces geometrically
complex metallic parts at high production rates. Due to the severe mechanical and thermal
cyclic loading, die failure is a significant issue in die-casting. This invention provides a method
for embedding a failure predicting mechanism within the working surface of die casting dies for
molten metals. This is done using a piezoelectric thin film sensor that can be use with any
coating system for the die. The sensor would detect the onset of failure in the protective layer
by the sudden increase in stress level, which always accompanies such failure. The sensor can
then facilitate precautionary measure to be adopted.
Main Advantages of this Invention
 Senses failure before traditional
 Can be used with any coating
 Allows for unmanned
monitoring of machining
systems in production lines
Potential Areas of Application
 Manufacturing
 Steel Industry
 Die cast and coating companies
ID number: 8001
Intel ectual Property Status: US 8,833,174
Opportunity: We are seeking an exclusive or non-exclusive licensee for marketing,
manufacturing, and sale of this technology.
For more information contact:
William Vaughan, Director of Technology Transfer
Colorado School of Mines, 1500 Illinois Street, Guggenheim Hall Suite 314, Golden, CO 80401
Phone: 303-384-2555; e-mail: wvaughan@mines.edu