Bushings® are recommended by a variety of
resin manufacturers, molders, mold makers, designers and engineers as a product that
works, is truly a straightforward, uncomplicated processing aide.
The PERFORMANCE Sprue Bushings®
is available in a number of popular standard sizes, with non standards offered at
reasonable prices with quick deliveries.
Many users are so pleased with the overall performance of this product
that the PERFORMANCE SPRUE BUSHING® is now
specified in all of the molds they build.
Try one, you will not be disappointed.
Prices on standards are between $243.00 - $271.00
(* Carbide lined slightly higher)
We can also supply with a "wire start" hole only for customer
finished internal detail
CALL US WITH YOUR APPLICATION TODAY TOLL FREE
CYCLE TIMES LIMITED BY SPRUE
Mold cycles are often limited or controlled by the length of time needed
for the solidification of the plastic sprue. The sprue must be cool enough not to stick,
break or tear as the mold is opened. Or, when molding small parts where the parts could be
ejected, but the sprue is not solid enough to allow mold opening, there is added time just
for sprue cooling. These cycle limiting conditions can be changed by using the Performance
Sprue Bushing®, without any other changes to the
CORROSION & STICKING SPRUES
Many plastic resins, additives, colorants and combinations lead to
corrosion and sticking problems with conventional steel sprue bushings. The inherent
corrosion resistance and release properties of the copper alloy used in the Performance
Sprue Bushing® offers a significant increase in
performance and product life compared to conventional steel sprue bushings.
SPRUES AS ROBOT GRAB POINTS
The sprue is often used as the grab point in robotic removal of parts,
sprues and runners. This requires that the sprue be rigid enough to resist the pressure of
the robot fingers as well as the extraction forces. With conventional steel sprues this
measure is most often met by added cooling time to the mold cycle. The Performance Sprue
Bushing® will again reduce the sprue cool time,
without any other changes to the mold. Use of this product will yield more rigid sprues
with reduced cool times set on the molding machine timer.
PREVENTING MOLDING PROBLEMS CAUSED BY SPRUES
Molders that use Performance Sprue Bushings®
in a variety of mold and resin applications say they are able to control many sprue
related problems. They no longer "just struggle with sprue problems".