Sonics GXT - Manual (Page 7)

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I N S T R U C T I O N M A N U A L • M O D E L G X T P O W E R S U P P LY
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I N T R O D U C T I O N
The GXT power supply is an ultrasonic generator with automatic frequency
tuning and a built-in Microprocessor that features time controls. The
Microprocessor is programmed with a multi-function keypad and information
is displayed on the back-lit liquid crystal display (LCD). This power supply
can be used with a pneumatic press or actuator, or with a stand-alone
converter.
O V E R V I E W O F U L T R A S O N I C P L A S T I C S
A S S E M B L Y
WHAT IS ULTRASONICS?
Ultrasonics refers to vibrational waves with a frequency above the human
audible range which is usually above 18,000 cycles per second (Hz).
PRINCIPLE OF ULTRASONIC ASSEMBLY
The basic principle of ultrasonic assembly involves conversion of high
frequency electrical energy to high frequency mechanical energy in the form
of reciprocating vertical motion which, when applied to a thermoplastic,
generates frictional heat at the plastic/plastic or plastic/metal interface. In
ultrasonic welding, this frictional heat melts the plastic, allowing the two
surfaces to fuse together; in ultrasonic staking or insertion, the controlled
flow of molten plastic is used to capture or lock another material in place
(staking) or encapsulate a metal insert (insertion).
ULTRASONIC ASSEMBLY SYSTEMS
Sonics ultrasonic assembly systems are generally composed of the following
major elements: a power supply, converter, booster, horn, pneumatic press
and holding fixture, as detailed in the diagram on the next page. A review of
this diagram will help you understand the basic elements involved in the
assembly process and their relation to each other.