MATERIALS • SERVICES • EQUIPMENT
demanding applications across a range of clients who have requirements that cannot be temperature gradient. At a specific
sectors such as medical, research and met from our standard range.” deformation of the specimen the
development, aerospace and defence, and instantaneous temperature is recorded as the
industrial. Mike Baker, Managing Director of Sherborne Sensors Ltd “Vicat softening temperature” or the “Heat
Sherborne Sensors, explained: “Our new SS2 Tel: +44 1908 673 868 deflection temperature”. Dependant on the
force transducer is one of a number of Email: robin.butler@sherbornesensors.com different test methods, it is necessary for Vicat
sensors that now utilise our Silicon Sensing Web: www.sherbornesensors.com or HDT testers to be configured in a very
Technology. We have engineered this unique versatile way: for pre-conditioning with or
technology to overcome the well known
Error Elimination in
without mechanical loading; for the degree of
issues associated with semi-conductor strain mechanical loading during the test; for the
Ultra Low Range SS2
gauges enabling us to deliver force Vicat and HDT Testing loading time in the non-heated bath; or for the
Force Transducer
transducers that meet the needs of the most temperature gradient. All these procedures
demanding of customer applications where During determination of thermal properties require a well structured and unambiguous
reliable and consistent measurements of ultra (Vicat or HDT tests) according to ISO 306, system to guide the operator — particularly if
Sherborne Sensors, a world leading company
low forces are required. Our Silicon Sensing EN 727 or ISO 75 these tests, a plastic a Vicat/HDT-tester consists of several
in the design and manufacture of superior
Technology also gives us the ability to specimen in a silicone oil bath is mechanically individual test stations. Even inexperienced
precision force transducers, accelerometers
engineer short lead-time bespoke solutions for loaded and then heated using a constant
and inclinometers, has launched its SS2 ultra
CONTINUED ON PAGE 22
low range force transducer utilising its Silicon
Sensing Technology to deliver highly reliable
measurements of ±30 g. The SS2 force
transducer has been engineered specifically
for the precision measurement of extremely
low forces in the range of ±30 g. The sensor
is designed around the company’s unique
Silicon Sensing Technology (SST) conferring
excellent sensitivity whilst eliminating fragility
and minimising temperature errors associated
with other types of low range force sensor.
The design features excellent immunity to the
effects of eccentric loading, side loading and
bending moments. Forces may be applied
either in tension or compression and
alternative loading adaptors are available. The
low deflection and consequent high
frequency response ensures that the unit is
suitable for measuring peak and transient
forces. The sensor is suitable for many
SPECIAL FOCUS
Electric Valve Gating
Until now, electric valve gating has been
limited by factors such as electric piston
overheating, limited cycle times, slow pin
actuation, high price and lack of closing
forces. Mold-Masters offers an electric
valve gate (EVG) for the hot runner
marketplace that reportedly has superior
performance characteristics to
pneumatic systems. Compared to
conventional pneumatic systems and
other competitive electric valve gate
systems, Mold-Masters new proprietary
electric valve gate has a very high
closing force which, in some cases, is
almost two times higher than pneumatic
actuators. The unique design of the
actuator allows for pin movement in less
than 0.1 second and overall moulding
cycles below 1 second. EVG is up to
90% more energy efficient than
traditional actuators for valve gates and
is ideally suited to cleanroom
applications as it produces almost no
particulate pollution. In addition to the
energy savings, plate costs are reduced
on EVG systems because there is no
requirement for gun-drilling of air or
hydraulic channels, plugging of the gun-
drilled lines, or need for water/hydraulic
fittings. The EVG system is standardised
and modular in design so it can easily be
removed and used on future molds.
Mold-Masters Ltd
Tel: +1 905 877 0185
Web: www.moldmasters.com
www.eppm.com EPPM 21
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