Cheap used and second hand electronic products machinery smt pcb soldering reflow oven for smt
line machine
Name: Cheap used and second hand SMT reflow oven
Model: Cheap used and second hand SMT reflow oven
Specification: reflow oven
Condition: original/copy
Quality: top qualiy
Stock: large
Payment: L/C T/T D/P Western Union Paypal Money Gram And Others
Shipment: In three days
Warranty: 1 year
Delivery: fedex,ups,dhl,as required
Package: carton box with foam protect
Reflow soldering involves melting a paste of solder and flux to
form a permanent bond between electronic components and printed
circuit boards. A typical reflow solder process is carried out as
follows. The process begins by laying a stencil with holes cut out
for individual pads over a PCB and applying solder paste to the PCB
with a screen printer. A pick and place machine or other placement
equipment then positions electronic components onto the PCB,
aligning component leads with the solder paste pads. The board is
then sent through a reflow oven to heat the paste and then cool it,
forming a permanent bond between the components and the PCB. The
board can then undergo cleaning, testing, packaging, or further
assembly into a completed product.
A typical reflow soldering process follows a temperature profile
that characterizes the optimum rate of heating and cooling that the
solder paste and components should experience. The four main zones
of the thermal profile are preheat, soak/preflow/dryout, reflow,
and cooling.
The preheat zone involves heating the entire assembly at a
controlled rate between 1 – 4°C to temperatures from 100 to 150°C.
The rate of heating in this zone is critical to avoid thermal shock
to the components.
The soak zone holds the temperature at a steady level for up to two
minutes between 150 to 170°C. This allows fluxes to activate and
for the temperature to stabilize throughout all components.
The reflow zone heats the assembly to a temperature higher than the
solder’s melting point for 30 to 60 seconds to ensure reflow for
every soldered lead.
The cooling zone lowers the temperature at a controlled rate
between 1 to 4°C to evenly form solid solder interconnections
between components and the board, with ideal grain size and
structural strength.
Specifications
Today’s reflow ovens have a variety of features tailored to the
intended use, the duration of production, and the desired outcome.
Selecting a reflow oven requires consideration of all aspects that
affect the process of production. Considering the following
criteria can be helpful when choosing a reflow oven:
Thermal performance
Throughput
Maximum temperature rating
Heating technology
Reflow oven type
Entrance clearance
Maximum PCB width and height
Speed of conveyor
Conveyor design
Process gas
Computer software and PC interface
Power supply
Software
Reliability
Serviceability
Maintenance downtime
We have full range of SMT pick and place machine For
FUJI,JUKI,SAMSUNG,YAMAHA,PANASONIC and so on,feeder,nozzle,smt pick
and place machine,PCB Conveyor,
cylinder,and vibration feeder,anything you need ,just tell me!
The main brand is Fuji YAMAHA Samsung Panasonic SONY heavy machine
1. SMT lubricating oil
2. SMT parts
3. Nozzle and feeder
4. SMT belt and other parts in the machine
