RJG Lynx LS-B-127-125, Руководство по эксплуатации продукта

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Product Manual | Lynx™ Strain Gage Button Sensors LS‑B‑127‑50/125/500/2000 RJG, Inc. 31
NON‑STANDARD INSTALLATIONS
STATIC (NON‑MOVING) EJECTOR PINS
While cavity pressure sensor installation
with moving, or “working” ejector pins is
recommended, in some situations a non‑moving
or “static” pin must be utilized; static ejector
pins may be used in either the ejector plate or
in the clamp plate as described previously in
“Clamp Plate (Typical) Installation” on page 8
and “Ejector Plate Installation” on page 20
Read and follow all instructions, and refer to the
provided figures to properly install sensors with
static ejector pins.
1.
Static Ejector Pins Overview
Static ejector pins are non‑moving pins which
sit on top of button‑style sensors to transfer
plastic pressure in the cavity to the sensor in a
mold plate. Unlike moving ejector pins which
self‑clean during each ejection cycle, static pins
can allow build‑up of material around the pin
over time. Static pins should have an O‑ring
on the end of the pin to prevent contamination
build‑up that contributes to measurement
errors, allowing the sensors to read accurately
over time.
Successful static pin installation provides lower
sensor and installation costs; easier sensor
maintenance; flexibility in sensor and pin sizing;
and freedom in sensor location.
2.
Ejector Pin Bore and Lead‑In
Provide space in the sensor pocket for the
sensor and static pin allowing for clearance
above the pin head equal to 1/5th of the
part thickness at pin location (
1
at right ) if
part thickness is less than or equal to 0.06”
(1,5 mm), or 0.012” (0,3 mm [
1
at right ]) if
the part thickness at pin location is greater than
0.06” (1,5 mm).
From the sensor and pin head pocket, provide a
bore of clearance equal to the pin diameter plus
0.04” (1,0 mm [
2
at right ]) if the pin diameter
is less than or equal to 0.12” (3,0 mm); if the
pin diameter is greater than 0.12” (3,0 mm),
provide a clearance of the pin diameter plus
0.06” (1,5 mm [
2
at right ]).
1
STATIC PIN INSTALLATION
Sensor
Static Pin
H7/g6 Fit
O‑Ring
Chamfer
≤30°
Chamfer
2
3
Step down the bore to a standard ejector pin
bore of H7/g6 (
3
above ) (in which the ejector
pin is able to freely move) before the cavity to
provide a sealing surface for the O‑ring at the
end of the static pin. Chamfer the transition
between the sensor and pin head pocket and
the pin bore, and also the transition between
the pin bore and standard fitment at the end of
the pin ( no more than 30°/15° per side ).