Automatic vertical convection thermal system
READY FOR LARGE PCBS, EASY TO USE, RELIABLE PERFORMANCE
The automatic vertical convection
thermal system is specially designed according to the
the backend process and to solve the
bottleneck in the operating process. This
automatic curing system consists of
seven parts: PCB input device (pallet),
Lifting device, transition device, PCB output device
Device, heating device, width adjustment device
Width adjustment device and control system.
The tax system is a self-developed
PLC, the drive motor is a stepper motor
and servomotor of a well-known brand. Friendly touch screen interface makes the whole systemSystem precise, easy to operate, reliableperformance, continuous curing processand adjustable curing time, making it the bestbest choice for the curing process.
Properties
PCB size: 600x600mm (L*W)
– Conveyor: Floor and return
– Distance between the slots: 50mm
– Number of slots: 32 cages at the front, 32 cages at the rear
– Weight: More than 6 kg per layer
– Zones: 3 temperature zones and 5 sensors
– Control of the heating:
” Temperature monitoring probes (thermocouple)
” The heating speed can be adjusted
– Photoelectric sensor: Detection of the position of the circuit board
– Fiber optic sensor: Detection of the position of the circuit board
– Detection of the stroke limit fiber
– Width adjustment device: The movable rail
moves to adjust the width
– Safety: CE safety measures and protection
Devices
System workflow
When the device is in operation, the warm
flow air is continuously fed into the chamber.
After the temperature has reached the set value,
the product (pallet) into the panel layer on the
the product (pallet) into the panel layer on the side, the lifting device
layer upwards until it reaches the transition layer. The
Transition device sends the product to the
side of the exit, and then the lifting device moves
the product down layer by layer
and sends it to the output level. The outlet device sends
products out of the oven; the work cycle
will be continued in order to complete the process.
Properties
HEATING DEVICE
The motor drives the wind wheel in the heating box to supply the inside of the stove with heat. The hot air flows through the air ducts on both sides of the appliance and enters the chamber through the grille plate, where it forms the vortex of the air flow, which is sucked into the external outlet and finally forms a circulation flow in the chamber.
CONTROL OF THE PRINTED CIRCUIT BOARD FEEDER
The speed of the stepper motor is controlled by the main PLC. A photoelectric sensor controls the starting device for PCB centering. A photoelectric limit sensor detects whether the position of the inserted PCB is correct. If not, operation of the system is interrupted. A fiber optic sensor installed in the chamber is used to determine whether the PCB is in place or not.
CONTROL OF THE LIFTING DEVICE
The components of the lifting mechanism are driven by a servomotor which is connected to the main controller (PLC). The speed of movement and the positioning of the hanger in the chamber are controlled according to the preset program. The fiber for detecting the stroke limit is installed at the lower end of the output. If the output layer falls beyond the detection limit, operation is interrupted.
PRINTED CIRCUIT BOARD OUTPUT DEVICE
Two parallel chains are installed at the side exit and a pressure device is attached to both chains. The chain is driven by the installed sprocket. A stepper motor is installed below the outlet, which drives the two chain wheels and transports the product from the outlet layers to the connection device outside the chamber. The output is driven by a stepper motor whose speed is controlled by a PLC.
