DME 250 Series - Manual (Page 2)

D-M-E SHALL NOT BE LIABLE FOR MISUSE OR FAILURE TO FOLLOW THE ENCLOSED
INSTRUCTIONS AND SPECIFICATIONS. D-M-E HERBY TO DISCLAIMS ALL IMPLIED
WARRANTIES, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. IN NO EVENT SHALL D-M-E BE RESPONSIBLE FOR LOSS OF USE, REVENUE
OR PROFIT, OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGED.
ASSEMBLY PROCEDURE
1. Nozzle body must be cleaned of any material in the seal off area and threaded
areas before reassembling.
2. Install the heater using a square coil heater wrench (Wrench included with
replacement heater). After the heater is installed, it should cover the entire length
of the nozzle body - stretch the heater by hand if necessary.
3. Apply an anti-seize compound on the tip threads.
4. Firmly screw the tip sub-assembly into the shank of the nozzle body. Tighten an
untighten two or three times making sure there is a good contact between the tip
and the shank. Torque the sub-assembly into the nozzle body using 30
5 ft-lbs.
For protection of the tip sub-assembly, a six point deep well socket is recommended.
29111 STEPHENSON HIGHWAY
MADISON HEIGHTS
MICHIGAN 48071 USA
US 800-656-6653
CANADA 800-387-6600
www.dme.net
DANGER
WARNING
IMPORTANT SAFETY INFORMATION
A hot-runner system includes electrical elements and may contain molten
plastic at elevated temperature and pressure. To avoid injury, exercise
caution by reading these instructions before servicing or operating the
system.
These instructions must be passed on to the end user where they should
be read before using this product. Failure to do so can result in serious
injury or death.
Failure to comply can result in serious injury or death:
STORED ENERGY AND HIGH TEMPERATURE HAZARDS
This product maintains molten plastic at high pressure. Use caution when
operating and servicing the system.
Physical contact with molten plastic may result in severe burns. Proper
protective equipment, including eye protection, must be worn. This product
has heated surfaces. Use caution when operating and servicing the system
to avoid severe burns. Proper protective equipment should be worn.
Failure to comply will result in serious injury or death:
ELECTRICAL HAZARDS
Improper voltages or grounding can result in electrical shock. Use only
with proper voltage and a proper earth ground.
To avoid electrical shock, do not operate product when wet.
Do not operate this equipment with covers or panels removed.
To avoid electrical shock, turn off main power disconnect and lockout /
tag out before servicing this device. Do not connect temperature sensors to
electrical power. It will damage the product and it can cause fire, severe
injuries or even death.
If green ground wire present wire must be connected to the ground.
Do not rebend rigid leads. Rebending leads might result in damage to circuit.
Product might absorb moisture when cool. Use low Voltage or power to drive
out residual moisture before applying full power. Failure to do so may cause
damage to this product.
ESG2/IS
Controller equipped with Step Smart ® , Smart Step ®
Make sure you maintain this start-up setting for 15 minutes.
When starting the nozzle, set the temperature to 10% voltage if using in open loop
Temperature Control.
It is recommended to use a D-M-E closed loop Temperature Controller for optimum
Type J Thermocouple.
procedure will allow the heater to dissipate any moisture.
08-08
F if using closed loop automatic type. In either case this
heat to transfer into the tip before molding.
manual type or to 200
The nozzle must be "keyed" to prevent wire damages.
ME-0741-PS-553-D
when removing tip counter-clockwise from the nozzle. If nozzle is still in the mold,
nozzle must be at processing temperature and the heater should be turned off
REFER TO : MINI PRINT # 1800
6. Careful attention should be taken to the heater / thermocouple leads as
INSTALLATION DATA
SPRUE GATE NOZZLE
250 SERIES EXTENDED
2. For removal of tip from nozzle, a six point deep well socket is recommended. The
It is essential to use controllers with the proper voltage and wattage capabilities.
1. Place the nozzle in a vice using "V" Block, then secure it firmly at the nozzle head.
DISASSEMBLY PROCEDURE
The voltage and wattage of each heater is clearly marked on the heater tag.
of DME Company.
Step Smart ®, Smart Start ® and DME ® are all registered trademarks
or other heater warm-up circuitry will change automatically.
8. Wait a minimum of 5 minutes after set point has been achieved for sufficient
manifold are removed to ensure seal-off.
7. Seal ring for nozzle body must be replaced each time nozzle body and / or
replacement heater).
5. Cast-In heater may be removed if failure occurs and replaced with a Square Coil
Heater. Follow assembly procedures for Square Coil Heater.
damage could occur when working on nozzle assembly.
3. Tip must be cleaned of any material before reassembling.
4. Remove the heater using a Square Coil Heater wrench (Wrench is included with
OPERATING & SERVICING INSTRUCTIONS
FOR 250 SERIES EXTENDED SPRUE GATE NOZZLES
All interchangeable nozzles are similar, and differ only in size and material flow
capacity. The information found below applies to the 250 Series Extended sprue
gate nozzles.
OPERATING PROCEDURE
The nozzles are supplied with a Square (Flat) Coil or Cast-In heater equipped with a