!
Caution
(1) Example of a suitable jig
[In the case of Single-side Mounting]
An outline of the board separation jig is shown as follows.
Recommended example: Stress on the component mounting position can be minimized by holding the
portion close to the jig, and bend in the direction towards the side where the capacitors are mounted.
Not recommended example: The risk of cracks occurring in the capacitors increases due to large stress
being applied to the component mounting position, if the portion away from the jig is held and bent in the
direction opposite the side where the capacitors are mounted.
[Outline of jig]
[Hand Separation]
Recommended
Not recommended
Direction of
load
Direction of load
Load point
Printed Circuit Board
Printed circuit
board
V-groove
Component
Components
Printed circuit
board
Load point
Board Cropping Jig
[In the case of Double-sided Mounting]
Since components are mounted on both sides of the board, the risk of cracks occurring can not be avoided with the
above method. Therefore, implement the following measures to prevent stress from being applied to the components.
(Measures)
(1) Consider introducing a router type separator.
ꢀIf it is difficult to introduce a router type separator, implement the following measures.
(Refer to item 1. Mounting Position)
ꢀ
ꢀ
(2) Mount the components parallel to the board separation surface.
(3) When mounting components near the board separation point, add slits in the separation position
near the component.
(4) Keep the mounting position of the components away from the board separation point.
(2) Example of a Disc Separator
An outline of a disc separator is shown as follows. As shown in the Principle of Operation, the top
blade and bottom blade are aligned with the V-grooves on the printed circuit board to separate the board.
In the following case, board deflection stress will be applied and cause cracks in the capacitors.
(1) When the adjustment of the top and bottom blades are misaligned, such as deviating in the top-bottom,
left-right or front-rear directions
(2) The angle of the V groove is too low, depth of the V groove is too shallow, or the V groove is misaligned
top-bottom
IF V groove is too deep, it is possible to brake when you handle and carry it. Carefully design depth of the
V groove with consideration about strength of material of the printed circuit board.
[ Outline of Machine ]
Top Blade
[ Principle of Operation ]
Top Blade
[ Cross-section Diagram ]
Printed Circuit Board
V-groove
Bottom Blade
Printed Circuit Board
[Disc Separator]
Recommended
Top Blade
V-groove
Not recommended
Top-bottom Misalignment Left-right Misalignment
Front-rear Misalignment
Top Blade
Top Blade
Top Blade
Bottom Blade
Bottom Blade
Bottom Blade
Bottom Blade
[V-groove Design]
Example of Recommended
Not Recommended
Low-Angle
Depth too Shallow
V-groove Design
Left-right Misalignment
Depth too Deep
JEMCGC-2703M
17
MURATA [ muRata ]
