15
°
Reference Guide for Vacuum Pad
Impact on pad
Avoid an impact or a large force on a vacuum pad, when it is
pressed against a work-piece. It may cause deformation, crack or
abrasion at an early stage of use. Adjust the pad position so that
the lip of pad touches lightly on a work-piece. Especially a small
type of vacuum pad should be positioned precisely.
Porous or perforated work-piece
Since the suction of a porous work-piece causes a drop of suction
force, select the proper specifications of vacuum system and secure
a larger effective cross-section area of the piping. Selecting a small
type of vacuum pad is one of solutions to reduce the air leakage.
Large and wide flat plate work-piece
When lifting large size of glass board or circuit board, work-piece
may bend by the lifting acceleration or the self-weight. Select a
proper size of pad and positioning, considering an enough margin
of suction force.
Soft work-piece
Work-piece with different heights
Select Long Stroke Series for work-pieces having different heights,
or piled-up work-pieces. Its stroke can absorb the difference in
height.
Inclined work-piece
Select Free Holder for an inclined work-piece.
Positioning within this
range
Porous work-piece
Plastic bag, paper, etc.
Large size of glass board or circuit board
Inclined work-piece
Work-pieces having
different heights
Large force by lifting
Plastic bag, paper bag
●
Figure-1
●
Figure-2
Long Stroke Series
Free holder
Two selection of articulation
angle: 0-15
°
/0-30
°
Lifting work-piece, sucking the both side of it
Since all vacuum pad holders are designed for horizontal lifting,
consider the strength of holders and pads.
Work-piece
Lifting
Consider to reduce the stress
against holders and pads
by sucking the both sides of
work-piece.
Vacuum pad
Pad holder
Conveyance with rotary movement
When vacuum pad is fixed with a screw and has a rotary movement,
the pad may drop due to the loosened screw. Pay special attention
when the vacuum location of work-piece is off the center of work-
piece gravity.
Safety factor (1/8) of vertical lifting
needs to be applied in rotary
conveys or lateral movement
When soft work-pieces such as plastic bags, papers or thin boards
are sucked, work-pieces can be deformed or shrunk by vacuum
suction (Figure-1). Select smaller vacuum pads and reduce the
vacuum pressure. Smaller vacuum pads are suitable for plastic
bags and papers. When plastic / paper bags are opened by using
vacuum pads, shift the center of two vacuum pads slightly in order
to open them easily as Figure-2 shows.