Tuesday, August 14, 2012

Dukane Donates Equipment to Bioplastics Characterization Lab

Dukane Corporation donated a pneumatic ultrasonic welder and loaned a servo-actuator controlled ultrasonic welding system to David Grewell’s bioplastics research group. The new equipment will be used to study various control algorithms for cutting polylactic acid (PLA) films. They were installed in the Bioplastics Characterization Lab, part of the suite of research labs operated by the Center for Crops Utilization Research (CCUR).

Mike Johnston, Dukane Vice President of Sales and Marketing,
shows Sara Underwood, graduate student in agricultural and
biosystems engineering, how to use the ultrasonic welder. 
“The donation will enhance learning outcomes in laboratory exercises as well as give students a one of a kind, hands-on experience. In addition, the research with the servo system will allow us to develop fundamental knowledge on ultrasonic cutting,” said Grewell.

Dukane also delivered a 30 kHz handheld ultrasonic welding system to the Department of Agricultural and Biosystems Engineering’s Technology Systems Management teaching laboratories.
Grewell is an associate professor of agricultural and biosystems engineering and CCUR affiliate. His bioplastics research group focuses on formulating, processing, testing, characterizing, and joining bioplastics. He also chairs the Biopolymers and Biocomposites Research Team, a CCUR research program.

Dukane is a global provider of plastic welders for welding thermoplastic materials.

Courtesy of Iowa State University: 

Friday, August 3, 2012

Why am I getting inconsistent parts?

QUESTION: I'm getting inconsistent parts even though I'm following the same parameters. Why?

ANSWER: You need to look at all elements of the project in order to pinpoint the problem. We suggest looking at the molded parts for warpage, heat sinks and cavity-to-cavity variations. Look at the joint design to make sure you have the right joint for the material and the part configuration. For example, using an energy director on a nylon part is a bad match.

Next, check out the elements of the welding system itself. Does the horn match the contours of the part? Or maybe the horn has a small, hairline crack.

Check the fixture to make sure it isn't allowing the part to move around or is in some other way dissipating energy.

Check the booster. Is it providing the right amount of amplitude for the resin and the part design?

The fastest way to diagnose all these problems is with iQ Explorer II advance user software. You can analyze distance, energy level, peak power, force, pressure--any relevant variable-- Along with detailed graphs of the weld process. It's worth the investment.

Call Dukane. They'll come in and do a full diagnostic test using their own iQ Servo welders with patented Melt-Match® technology,   and the price is right--it's free!