| New Standards
Introduced for Sleeve Applications
Progressive Components introduces
three new components to further standardize mold ejection:
Thin Wall Sleeves are designed
for today’s thinner plastic wall sections. Instead of
purchasing a custom ejector sleeve or machining a step
in a standard sleeve, Progressive has developed a standard
line of sleeves with .03" wall thickness.
Thin Wall Sleeves are available
with inner diameters of 3/32ř to 3/8ř in two standard
lengths, 4" or 6". The bearing lengths are similar
to that of a standard sleeve, with 2" of bearing
and a long tapered lead-in from the end of the sleeve.
Progressive’s Thin Wall Sleeves are engineered from A-2,
providing a cross section which steps out to a wider shoulder
and head diameter. The sleeves are treated with Nicklon®
on the inner and outer diameters to provide wear resistance
and lubricity during production.
Another new product designed
to eliminate special order sleeves is the Sleeve Extensions.
Many times, a larger mold application will call for longer
length sleeves and standard sleeves may fall short. By
utilizing the Sleeve Extension, catalog standard and Progressive’s
Thin Wall Sleeves gain an extra 3" of height while
maintaining industry standard counterbores in the pin
plates.
The Sleeve Extensions are
easily installed in the pin plates first, and the Ejector
Sleeve simply slides into the t-slot on the extension,
with no additional machining required. The Extensions
are manufactured from 1215 steel and etched for easy identification.
In addition to these new
standards, Progressive has developed a simple and cost-effective
method to retain the center core pin when used in ejector
sleeve applications. The Core Pin Retainers (patent pending)
utilize a standard thread size, similar to a set screw.
However, unlike a set screw, a head enables the retainer
to bottom out rather than thread into the core pin head.
This allows the pin to float slightly for optimum pin-to-sleeve
performance and eliminates the need for extra machining
of space-obtrusive plates.
All Ejector Sleeve
System components are now in stock at Progressive, priced
much less than comparable methods.
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