How to tell when your die isn't shutting off
If you observe any of the following delays in your operation, chances are, it is due to a die that is not shutting off correctly.
What is happening in each of the above events is that the operator is compensating for a die that is not sealing properly. The operator has learned that by cooling the metal, it will not flash as bad or maybe not at all. However, he is costing the operation money. You are throwing away BTU. The process is designed to operate at an optimum temperature. It is also designed to operate with a die that is sealed off except at the vents. When the shot is delayed, you are paying to heat the metal, and then he is cooling it below the proper operating temperature. While this may eliminate or reduce the amount of flash, this results in a casting which can have "cold" defects. The "cold" defects can result in scrapped castings, rework, customer complaints and lost business.
The choice is to stop the process and repair the die and/or the machine to prevent the flash. Including one or more of the following:
The above have proven to reduce flash, improve part quality and increase productivity by reducing cycle time and scrap.
If you need assistance reducing flash and improving profits, contact us by one of the following methods.
For more information contact Bob McClintic @: RMcClintic@DrDieCast.com
Copyright Bob McClintic and Associates: 1991 to 2009
Home • Consulting • Samples and Stories • Clients • Dr.Diecast • Technical Articles • NADCA Scholarship
This site runs best with ActiveX enabled on computers running Microsoft Internet Explorer.
Site Designed by Jonathan McClintic
All Content © 2009 McClintic and Associates