FRITSCH Pick and Place machine.pdf - 第32页
32 Applications Large components Although the size of constructions in the electr onics industr y has been fur ther minimised for man y y ears, there ar e still sufcient elds of a pplication where a miniaturisation is …
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Dispensing systems
Dispensing modul
While the production of prototypes and small series it
is an advantage to bring glue or solder paste with the
help of a machine on the PCBs and than to assemble it.
Several dispensing systems are available and with the
double dispenser module it is possible to handle two
various uids.
Time-pressure dispenser valve
The simple means of attaching the valve makes it
particularly robust and low-maintenance. The adjustable
pressure affects the cartridge after a short period.
The desired amount can easily be set in the software.
Normally for solder paste or glue for rough structures.
Precision dispenser valve
In the case of the precision dispenser valve, additional
parameters such as temperature and the ll level of the
cartridge are collected.
The processor control regulates these values, the
pressure and the time of the dispensing impulse in order
to achieve the highest repeat accuracy. This enables the
safe dispensing of amounts from 0.001 to 10 mm³.
By this Fine-Pitch components down to a pitch of 0.5
mm can be safely dispensed.
Jet-Dispensing-System
The very fast piezo dispenser valve dispenses amounts at
a very high speed. In the case of a dispensing frequency
of up to 150 dots/second, it is possible to constantly
apply very small amounts (up to 2nl).
The high dispensing frequency enables the dispensing of
smallest amounts as well as larger with only one head
dispensing.
Screw dispenser valve
Suitable for the accurate dispensing of medium-viscose
media such as SMD adhesive, soldering paste or silver
conductive adhesive.
The medium is transported with as little application of
pressure as possible. The actual dispensing is carried out
by being transported by the spindles. This means the
application of pressure of the material is kept as low as
possible.
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Applications
Large components
Although the size of constructions in the electronics
industry has been further minimised for many years,
there are still sufcient elds of application where a
miniaturisation is not possible. In order to automate the
assembling of such constructions, a machine is required
that excels with both component dimensions and with
its exibility.
Flexible PCBs
Be it a exboard only or a Starrex PCB, both provide
enormous potential for optimising costs or they offer
a compromise between a rigid PCB and a 3D MID
component. Flexible PCBs are easier to integrate
into the existing mechanical environment and thus
create a new way of implementing your developments.
Typical applications of these boards can be found in the
automotive industry or robot technology.
Production of membrane keyboards
The manufacturing of membrane keyboards or displays
is still mainly manual production of the components.
FRITSCH provides some unbeatable options for cost
optimisation and acceleration of production with their
pick & place machines for the assembly of domes and
LEDs.
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Applications
Power electronics
Electric power systems in the automobile sector, industry
or many others elds of application require optimised
motor electronics for their efcient functionality. When
producing power electronics, other materials than for
normal electronics production are used.
Thicker layers of copper for higher currents, aluminium
or ceramic as carrier material require specially adapted
production equipment.
Odd shape assembly
The pick & place machine has a vision system that, in a
very easy way, can recognise and align any shape. This way,
even irregular components such as inductors, switches or
similar can be assembled in place.
Due to the component height that can be processed
of up to 26 mm, the placeALL pick & place machine
also enables the production of dissipators, shields or
other mechanical components. Thanks to the adjustable
pressure when assembling such components, mechanical
alignment pins can be printed into the PCB.
Aerospace
The electronics production in aerospace pursues entirely
different goals than conventional electronics assembly.
For more than 20 years now, FRITSCH has been
developing special pick & place machines for this sector
in close cooperation with the respective companies and
institutions.
Back then, it all started with semi-automatic assembly
stations with integrated component testers for
measuring the component values – immediately before
assembly. This was the only way the extreme demands of
traceability and product quality could be ensured.