Volume XVI, Issue 7 - July 2019
The Cleaning Lady and the Rocket Scientist understand the pros and cons of cleaning options. Contact us to find the best solution for your manufacturing challenges.
Contact UsI currently manage two ultrasonic clean lines and in my quest to acquire more knowledge about cleanliness, I came across the Handbook for Critical Cleaning. It is a great help for me and it is a source of valuable information. The Handbook for Critical Cleaning is a must have for all seeking to achieve optimum cleanliness and maintain it.
Feature Article
Soprano or Bass—What Ultrasonic Frequency to Use? Part 1
By Ed Kanegsberg, BFK Solutions
You are in charge of improving the cleaning of your company’s product. You think ultrasonic cleaning is needed but need to know which frequency is best. In this two-part article, we will explore aspects of ultrasonic cleaning to make it easier to choose; in some cases, a system with more than a single frequency may be optimum.
High-frequency sound is a powerful tool in critical cleaning. The sound creates the agitation of the molecules of the liquid that dislodges soils and results in cleaning. The nature of the agitation is strongly dependent on the frequency of the sound. Cleaning can be accomplished using frequencies ranging from a “low bass” of ~20 kHz to a “high soprano” of over 1MHz. The higher frequencies, generally >400 kHz, are called megasonics. There is no sharp definition for where ultrasonics becomes megasonics.
Continue this article as we discuss strengths and limitations of low and high frequency processes, and how they can provide effective, profitable cleaning.
KNOWLEDGE IS POWER
Lean Cleaning
Critical cleaning is lean. The Cleaning Lady and The Rocket Scientist explain that sometimes less is more, but not always. Choosing cleaning agent or cleaning equipment based on cost alone may result in a process that destroys productivity. Understand how to specify and justify effective cleaning processes.
https://www.techspray.com/critical-cleaning-is-lean
Breaking News: Electronics Assemblers and Designers Actually Communicate
As Barbara explains to designers, today’s configuration requirements can result in elegant designs with cleaning and assembly challenges. When communication happens, productivity and quality improve markedly. We’ve seen it happen! So, read the article; invite your favorite designer to lunch; and talk about critical cleaning.
https://resources.altium.com/pcb-design-blog/meshing-design-with-assembly-flux-cleaning
PQCW – New Demonstrations, More about Ultrasonics
Sign up for the Product Quality Cleaning Workshop, May 13 – 14, 2020 at Sam Houston State University, Huntsville, TX. Try out critical cleaning processes. Discover how to improve manufacturing productivity. We’re developing new hands-on exercises and demonstrations (see this month’s feature article).
https://www.shsu.edu/academics/chemistry/cleanresearch/cleaningworkshop.html
Experts Don’t Always Agree!
At least they don’t always agree about everything. For example, our two-volume “Handbook for Critical Cleaning” contains seven chapters devoted to understanding the basis, variables, and metrics of ultrasonic and megasonic cleaning. As a manufacturer, your benefits include informed choices and effective manufacturing.
https://www.crcpress.com/Handbook-for-Critical-Cleaning-Second-Edition—2-Volume-Set/Kanegsberg-Kanegsberg/p/book/9781138074576