Husky Unify - Producing Test Parts

3. Clean the machine nozzle, stationary platen and purge guard of any resin deposits. Refer to
the machine manufacturer’s documentation for more information.
4. Make sure the machine nozzle is rmly seated against the sprue bushing.
5. Turn on the nozzle heaters and allow them approximately 5 to 7 minutes before mold
operation to reach operating temperature.
CAUTION!
Mechanical hazard – risk of damage to equipment. Do not allow nozzle tips to stay
energized for more than 10 minutes without injecting resin. Resin residing in the nozzle tip
area will degrade.
6. While the nozzle heaters are reaching operating temperature, do the following:
a. Turn on the extruder screw to start plasticizing the resin.
b. Repeat step 2 to step 3.
7. Move the machine nozzle forward until it is rmly seated against the sprue bushing.
NOTE:
The hot runner channels are properly lled with resin when the injection piston stops before
making contact with the injection housing.
8. Inject resin into the hot runner until the injection piston stops. The piston must stop before it
makes contact with the injection housing. If the piston makes contact with the injection
housing, inject resin again.
9. Once the injection piston stops, start the extruder screw and make sure it retracts fully.
5.4
Producing Test Parts
To produce test parts that will verify the settings and functions for the hot runner and machine,
do the following:
1. Make sure the nozzle heaters have not timed out. If the nozzle heaters have timed out, do
the following:
a. Enable the heaters and wait approximately 5 to 7 minutes to reach operating
temperature.
b. Purge the injection unit. Refer to the machine manufacturer’s documentation for more
information.
c. Clean the machine nozzle, stationary platen and purge guard of any resin deposits.
Refer to the machine manufacturer’s documentation for more information.
2. Close the clamp and apply tonnage.
3. Make sure the machine nozzle is rmly seated against the sprue bushing.
4. Reduce the injection pressure to 70 bar (1000 psi) .
5. Disable all ejector functions to prevent the machine from automatically ejecting parts.
6. Cycle the machine once in normal mode to produce a set of parts.
v 2.2 — March 2021 Unify Manifold System
58 Producing Test Parts