Plastics News Daily Report - May 9, 2018 - 56

56 ‹ PLASTICS NEWS DAILY REPORT ‹ May 9, 2018

Ultrasonic staking joins plastics, dissimilar materials
Herrmann Ultrasonics Inc. of
Bartlett, Ill., is displaying a patented version of ultrasonic staking that can join plastics and dissimilar materials.
The process utilizes a hollow rivet that it shapes into a
form-fitting bead.
Short joining times and high
retention force are characteristics of ultrasonic compressive
staking.
Parent firm Herrmann Ultraschalltechnik GmbH & Co. KG of
Karlsbad, Germany, and academician Michael Gehde began to
work on compression staking in
2012.
Gehde specializes in machine
components and product design
studies in the department of mechanical engineering at Chemnitz University of Technology in
Germany.
"As the compression staking
showed high strength combined
with a short cycle time during
research, we were certain about
the potential of the concept,"
said Tim Adler, application engineer with Herrmann Ultraschalltechnik.
Herrmann Ultraschalltechnik
obtained patents for compression staking technology in Germany in October 2011 and in the

Herrmann Ultrasonics Inc. photo

By Roger Renstrom
Plastics News Correspondent

Herrmann Ultrasonics Inc. believes its ultrasonic compressive staking is relevant for a wide range of materials.

BOOTH W8153
HERRMANN ULTRASONICS INC.
U.S. in January 2018. A patent
also exists in China. Ulf Riehm is
listed as the inventor.
"One important benefit of
the compression staking is that
there is no contact between vi-

brating sonotrode and the joint
partner," Adler said via email.
Having the vibrating sonotrode never touch the staked upper part is especially important
for applications with printed circuit boards and other electronic
components that could be damaged.
"The high strength provided
by compression staking is valu-

able for applications in the automotive and consumer sector,"
Adler said.
Herrmann believes ultrasonic
compressive staking is relevant
for a wide range of materials and
enables bonding between new
types of sophisticated material
combinations.
Traditional staking methods
can have disadvantages result-

ing from partially insufficient
bonding between the staked
head and the shank.
The ultrasonic advantage in
joining time is dramatic: 1.6 seconds (and an additional 1-second holding time) for ultrasonic
staking compared to 10-20 seconds for thermal staking. The
times do not take into consideration the required warmup
time and recommended cooling
cycles.
At NPE2018, Herrmann Ultrasonics is giving live demonstrations of compression staking
and its configurable HiQ Vario
ultrasonic welder with a radio
frequency identification reader.
The integrated RFID reader is
built into both the sonotrode
and the fixture.
Ultrasonic welding is suitable
for the medical manufacturing
industry.
The Vario provides multiple
pneumatic drive modes with different stroke designs along with
programmable
proportional
valve technology.
Generators come in three frequencies with power ratings
up to 6200 watts. Herrmann
says the Vario product line can
significantly reduce setup and
changeover times.
An integrated controller can
store up to 32 different weld applications.

Thermoforming
mechanics of emotions
Since 1981

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visit us at NPE 2018, booth No. S34067

wm-thermoforming.com

WM Thermoforming Machines will show its flagship thermoforming machine FC 780 IM2 to the 2018 NPE.

http://www.wm-thermoforming.com

Table of Contents for the Digital Edition of Plastics News Daily Report - May 9, 2018