DME 250 Series - Manual

1.501 0.000
+0.001
DIA.
0.
125 MI
N
.
"A
" + B
E
0.
250 MI
N
.
"N"
DIA.
BORE TO FIT TIP
"("T" DIA.) +0.0005 / -0.0000
0.
250 MI
N
.
A
FTE
R CUT
0.
250 MI
N
.
A
FTE
R CUT
0.
080 MI
N
.
3
0
.0
°
0.
080 MI
N
.
ESG2/IS
to the nominal "A" dimension. The formula
For selection of gate diameter it is important to take into consideration the materials flow characteristics, shear rate of resin, molding conditions, fill time
requirements, gate vestiage, wall thickness and configuration of part to be molded. Situations requiring high injection velocities must be considered
"T" DIA. CATALOG NUMBER
EHA0005
4.250 CIA0004
CIA0006 EHA0006
WIRING INFORMATION
Square Coil Heaters and Cast-In Heaters are supplied with 2"
See material manufactures literature for further information regarding material to be molded.
when selecting small gate diameters. High injection rates may require larger gates due to shear heat build up (e.g. high weight thin wall applications).
expansion of the nozzle (BE) at a given temperature must be added
EHA0004
To compensate for the nozzle's growth when heat is applied, the linear
1.187 1.250
3.750 CIA0003
1.000
below shows how to figure
250 SERIES EXTENDED
CIA0005
EHT0013 0.500
EHT0014 0.750
EHT0015
08-08
4.750
"N' Dia. (max.)
Square Coil or Cast-In
"N' Dia. (min.)
Square Coil or Cast-In
5.750
EHA0007 CIA0007 6.750
and Tip-assembly. NOTE: Nozzle Assembly requires Nozzle Sub-assembly
Before installing a Extended Sprue Gate Nozzle, it is important to take
SPRUE GATE NOZZLE
boring depth (dimension "A" + BE).The tip of the nozzle will now be
iron (magnetic).
REFER TO : MINI PRINT # 1800
follow the information below
INSTALLATION DATA
temperature of 500
ME-0741-PS-553-D
CHAMFER
The above information is only given as an example. variations may occur
0.030 X 45
2 power leads are Multi Color. 1 ground lead is GREEN.
EXAMPLE: Given a 3 inch "A" dimension, with a nozzle set point
F).
1 T/C lead is WHITE and negative (
MANIFOLD LINE
Thermocouple is "J" Type. Thermocouple is supplied with 36" leads.
prestripped 36" long leads.
F:
be necessary to obtain an empirical factor.
BE = 3 x 0.00000633 x (500 - 68) = 0.008
-
Thus "A" + BE will be 3.008
BE="A" dimension x 0.00000633 x (Nozzle set point temperature - 68
Formula for determining this expansion factor is as follows:
flush with cavity line.
1 T/C lead is BLACK and positive (+)
Heaters are 240 VAC.
constantan (non-magnetic).
)
Note:
based on mold configurations and cooling factor. In some instances it may
MACHINING DETAILS
the nozzle's expansion factor into consideration. For best results, please
SPRUE GATE TIP SUB-ASSEMBLY
NOTE:
NOZZLE SUB-ASSEMBLY
CATALOG NUMBER
"A" DIMENSION
FOR NOZZLE ASSEMBLY
SQ.COIL HTR. CAST-IN HTR.
EHA0001 CIA0001 2.750
EHA0002 CIA0002 3.250
EHA0003