FRITSCH Pick and Place machine.pdf - 第31页
31 Dispensing systems Dispensing modul While t he produc tion o f protot yp es and sm all ser ies it is an adv ant age t o brin g glue or solde r pas te wi th t he help of a m achine o n the P CB s and t han t o asse mbl…
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Conveyor systems
Fast and easy
Especially in small series the stand- and changeover
times should be reduced to a minimum. Therefore the
conveyor of the placeALL® range was optimized. The
justage of the PCB width as well as the positioning of the
supporter pins below the circuit can be done without
tools. Depending on application and local conditions the
best conveyor for optimal transportation can be chosen:
• 1 Zone-Conveyor
• 3 Zone-Conveyor
• Batch-Conveyor from left or right
SMEMA Interface
Each conveyor has the standard SMEMA interface. Thus,
machines can easily be integrated into any production
lines or even combined with a loader and unloader to
automate partial the pick & place process.
Stressless motion
To bring sensitive PCBs such as ceramic subtrates
or partial assembled PCBs safely to the placement
position, the PCBs are slowly moved through a ramp
of deceleration to the stopper and so the mechanical
load is reduced to a minimum. All conveyors are fully
programmable. The rate of feed, ramps and waiting times
can be adapted to the application.
Customization
By request the conveyor can be equipped with a
customized intake for workholding xture. This enables
to handle even heavy or customized workholding xture
in the placeALL
®
.
Standalone
Batch-System
Inline-System
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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.