Using these inputs, the ECM calculates the correct fuel injection pressure
, injection rate and injection timing which are then achieved by means of a hydraulically actuated, electronically controlled unit injector system (HEUI).
Variables affecting wax pattern production are dwell time, injection pressure
, die temperature, sprue design, platten temperature, die lubrication, wax flow rate, post-injection cooling, die venting and die surface.
With the new fuel system, maintaining peak injection pressure
is no longer dependent on engine speed, load conditions or fueling capability.
A "high filling mode" enables a temporary increase in maximum injection pressure
This injection unit is capable of more than 42,000 psi (or 2,850 bar) injection pressure
designed specifically for elastomers with demanding processing requirements.
In 1995, Cat added a Pre-injection Metering (PRIME) feature to HEUI, as well as raising the injection pressure
to 21,750 psi.
The available injection pressure
increased with the FIFO high-pressure rubber injection unit.
Elevating injection pressure
is an important factor in the reduction of emissions and fuel consumption: the higher the pressure, the finer the fuel atomization.
Such thin labels enable us to get perfect sealing with lower temperature and injection pressure
," says Bernet.
The Wyoming Oil and Gas Conservation Commission has approved the higher surface injection pressure
for the second cycle.
Silastic LC 2004 series LSRs are said to offer lower injection pressure
and higher speed requirements than other liquid silicone rubbers available on the market.
Standard features: Up to 20,000 psi injection pressure