DME Front Load Square Coil Heater User Manual

ME-0741-PS-778-B SCH9999

08-08

FRONT LOAD SQUARE COIL HEATER

INSTALLATION DATA

Please read carefully before
installing and/or removing heater.

0.634
FLAT

0.635

+0.001

0.000

1.000

R0.26 RAD.

0.531 TYP.

WIRE SLOT

GATE MACHINIG DIMENSIONS

0.375 RAD.

0.187 SPH. RAD.

TO SUIT 0.044 DIA. MIN.

90.0°

80.0°

+0.0005

0.7500 0.0000

0.030

0.005 LAND (MAX.)

DIA.

1.0000

0.38

CIRCLE
INTERPOLATION

GATE MATE 4

NOZZLE

MANIFOLD
LINE

0.250 MIN.

0.750 MAX.

0.7500 0.0000

0.25

1.0000

+0.0050

0.125 RAD.

0.31 MIN. DISTANCE BETWEEN WATERLINE

.NOTE: Dimensions are in inches

30°

1.562 DIA.

1.501

1.250 DIA.

0.770

+0.001

DIA.

0.000

0.140

"A" + BE

SEE NOTE

AND DROP

NOZZLE
PLT.

WIRE SLOT

"A" PLT.

NOTE: The expansion factor must be taken into consideration prior to machining and installing nozzle. This factor (BE) must then be added to the
nominal "A" dimension. Formula for determining this expansion factor is as follows:
BE="A" dimension x 0.00000633 x(Nozzle set point temperature - 68

F).

EXAMPLE: Given a 2.5 inch "A" dimension, with a nozzle set point temperature of 500 F:
BE = 2.5 x 0.00000633 x (500 - 68) = 0.0068 . . . thus "A" + BE will be 2.5068.

Please note that the above information is only given as an example. variations may occur based on mold configurations and cooling factor. In some
instances, It may be necessary to obtain an empirical factor.

CATALOG

NUMBER

SUB-ASSY.

NUMBER

"B"

DIM.

"L"

DIM.

WATTAGE

NOZZLE

REF. NO.
SCH1060 GMB1050 0.875 1.594 250 GMB0060
SCH1061 GMB1051 0.875
SCH2061 GMB2051 1.375
SCH1062 GMB1052 0.875
SCH2062 GMB2052 1.375
SCH1063 GMB1053 0.875
SCH2063 GMB2053 1.375
SCH1064 GMB1054 0.875
SCH2064 GMB2054 1.375
SCH1065 GMB1055 0.875
SCH2065 GMB2055 1.375
SCH1066 GMB1056 0.875
SCH2066 GMB2056 1.375

2.094 300 GMB0061

2.594 350 GMB0062

3.094 400 GMB0063

3.594 425 GMB0064

4.594

500 GMB0065

5.594 500 GMB0066

2.875

"B"

"L"

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.

FLEXIBLE
LEADS AFTER
THIS AREA.

08-08

SCH9999ME-0741-PS-778-B

FRONT LOAD SQUARE COIL HEATER

INSTALLATION DATA

Please read carefully before
installing and/or removing heater.

RELIEF SLOT

RECOMMENDATIONS AND GUIDELINES

1. Front Load Square Coil Heaters are designed to be used
with Gate Mate 4 Nozzles only.

2. The nozzle head must be held in such a manner to keep
it from rotating upon installation of the front load square
coil heater. This may be done by making a key for the
head to match the flat on the nozzle's head or by circle
interpolation.

3. Nozzle plate must be designed so that the heads of the
socket head cap screws are exposed when the mold is
split on the parting line.

4. After the nozzle has been located and positioned in the
nozzle plate with manifold secured in place and "A" plate
removed. The heater can be installed on the nozzle body
as follows:

a. Place heater within Tube "A" so that the bending exit
lead lies within the slot of the tube.

b. Insert tube "B" with angle cut within Tube "A" so that
the angle of the Tube mates with the last coil of the
heater.

c. Rotate Tube "A" counterclockwise while at the same
time rotating tube "B" clockwise. This action will
spring open the coils enough to slide the heater onto
the shaft of the nozzle body.

d. Slide the heater onto the nozzle body shaft aligning
the heater exit lead within the relief slot in the
nozzle's head.

e. Positon heater so that the end of the last coil is above
the relief of the seal-off area. (see figure above).

5. The power and thermocouple leads may be spliced in the wiring
channel for ease of heater replacement.

* Leads may be spliced using Thomas & Betts nylon insulated
disconnects.
Male Cat. No. 18RA-251T
Female Cat. No. 18RA-2577

6. Secure wires in wire channel with straps before assembling "A"
plate to mold.

1.375

NOZZLE PLT.

"A" PLT.

SHCS

OPTIONAL KEY
MOLDER TO
SUPPLY

1.875

NOZZLE PLT.

"A" PLT.

SHCS

OPERATING PROCEDURE

.875 "B" DIM.

1.250

1.375 "B" DIM.

1.750

SEAL-OFF AREA RELIEF

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 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.

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.

DANGER

WARNING

The nozzles are supplied with a Square (Flat) Coil Heater.
It is recommended to use a D-M-E closed loop Temperature Controller for
optimumTemperature Control.
When starting the nozzle, set the temperature to 10% voltage if using in open
loop manual type or to 200
In either case this procedure will allow the heater to dissipate any moisture.
Make sure you maintain this start-up setting for 15 minutes.
Controller equipped with Step Smart ® , Smart Step ®
or other heater warm-up circuitry will change automatically.
It is essential to use controllers with the proper voltage and wattage capabilities.
The voltage and wattage of each heater is clearly marked on the heater tag.

Step Smart ®, Smart Start ® and DME ® are all registered trademarks
of DME Company.

WIRING INFORMATION

Square Coil Heaters are supplied with 2" prestripped
36" long leads. Heaters are 240 VAC.
(120 VAC heaters are available on request).
2 power leads are Multi Color.
1 ground lead is GREEN.
Thermocouple is "J" Type.
Thermocouple is supplied with 36" leads.
1 T/C lead is WHITE and negative (-)
constantan (non-magnetic).
1 T/C lead is BLACK and positive (+)
iron (magnetic).

F if using closed loop automatic type.

D-M-E COMPANY

29111 STEPHENSON HIGHWAY
MADISON HEIGHTS
MICHIGAN 48071 USA
US 800-656-6653
CANADA 800-387-6600
www.dme.net