Ultrasonic Hand Held Welders For Plastic Assembly
PAS offers two 500 watt hand held ultrasonic
welders for plastics assembly; a 20 kHz, Model 502HH and a
40 kHz, Model 504HH. These compact and portable units are
rugged, reliable, and easy to operate. They are designed specifically
for welding, staking, inserting, and spot welding applications.
The lightweight hand pieces are ideally suited for manual
operations with low volume production requirements or for
assembling parts with difficult to reach weld areas. The units
consist of an ultrasonic power supply and a 1.5 lbs. (.68
kg) hand gun with a straight diameter cable. The 20 kHz hand
guns are supplied with integral 1/2” (12.7mm) diameter
titanium front drivers with replaceable flat face tips. Other
standard tips are available for various application requirements
(See chart for tip information). In addition, custom tips
can be designed for specific applications. The 40 kHz hand
gun is supplied with a removable horn designed specifically
for each customer’s requirements.
Most manual applications can be performed with
the 20 KHz model. However, the higher frequency and lower
amplitude of the 40 kHz system makes it ideal for welding
small assemblies that require gentler action. The hand gun
systems are available to operate at a standard 120 volts or
optional 220 volts nominal input voltage.
The power supply features autotune circuitry,
which eliminates the need to retune the system each time it
is turned on or when thehorn/tip is changed. It also regulates
the line voltage and provides constant amplitude throughout
the weld process. The welders contain a microprocessor based
programmable timer for weld times from 0.1 to 9.9 seconds.
Another function of the microprocessorincludes digital amplitude
control. All of these beneficial features yield a more precise
and repeatable cycle. Once set up, the user only needs to
apply the tip of the hand gun to the parts being assembled
and depress the switch on the gun’s housing to operate
the welder.
The 502HH and 504HH models have a standard DB9
I/O connector that can interface with automated machines via
a PC of PLC. This connector allows the user to control amplitude
and ultrasonics on/off times, as well as reset overload conditions.
Users can, with the DB9 connector, monitor the output power
(in watts) and hand gun frequency.
The 500 watt welders both contain two overload
protection circuits, one for the power supply and the other
for the converter. The system’s overload circuit protects
the power supply from exceeding its maximum wattage. The advanced
converter protection circuit is designed to protect against
excessive voltage or current caused by the application. With
a response time of less than 2 micro seconds, these circuits
instantaneously prevent internal component damage to the power
supply and converter.
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