CAVITY AND CORE COMPONENTS Runner Shut-Off Inserts – Machining Information
Dimensions for Machining Pocket for Runner Shut-off Inserts • Pockets are typically bored in soft steel and jig ground in hardened steel • Maintain a close tolerance press fit, as specified. Too loose a fit could allow the insert to move out of position, while too tight a press fit might prevent the center core from rotating when required
+.0000 –.0002
+.0000 –.0002
+.0000 –.0002
(Ø 13mm)
(Ø 16mm)
(Ø 26mm)
Ø .5118
Ø .6299
Ø 1.0236
+.002 –.000
+.002 –.000
Ø .59
.875
+.002 –.000
.875
.875* MIN
.020 R MAX
.020 R MAX
1.375 MIN
1.250
.020 R MAX
Ø .22
Ø .34
* When using a 7/8 thick plate with the MRS 0013 or MRS 0016 inserts, machine the .5118 or .6299 diameters through the plate. Inserts must seat against a supporting plate before any grinding or machining is done and during the molding process. MRS 0013 MRS 0016 MRS 0026
Dimensions for Machining Runners
HOLE FOR SPRING PIN MUST BE LOCATED AWAY FROM AREA WHERE RUNNERS ARE TO BE MACHINED, AS SHOWN
RECOMMENDED RUNNER SIZES
USE INSERT ITEM NUMBER MRS 0013 (MRS 0016 & 26)
W MAX
C MAX
R RADIUS
EQUIV Ø
AREA SQ IN
.099
.091
.040
.095
.007
.035 MIN. LAND BETWEEN EDGE OF RUNNER AND EDGE OF HOLE FOR SPRING PIN
.126
.120
.050
.123
.012
.150
.131
.062
.141
.016
.168
.144
.070
.156
.019
MRS 0016 (MRS 0026)
SPRING PIN HOLDS INSERT COMPONENTS IN POSITION FOR MACHINING RUNNERS
.186
.157
.078
.172
.023
.206
.175
.086
.191
.029
.260
.218
.109
.239
.045
.298
.250
.125
.274
.059
10° TYP
W MAX
.334
.281
.140
.308
.074
MRS 0026
.372
.312
.156
.342
.092
.410
.343
.172
.377
.112
.446
.375
.187
.411
.133
C MAX
Note: All runners should be machined along the center line of the insert and at 90° to the center line. If this is not done the runners will not align closely when rotated 90° or 180° to shut-off material flow to a cavity. All runners should be machined with inserts installed in the mold.
SHARP CARBIDE CUTTERS ARE RECOMMENDED FOR MACHINING RUNNERS
R
CENTERLINE OF INSERT
Mold and Runner Machining/Installation Data Additional machining and installation data available. Contact DME.
All dimensions are in inches except for a few metric reference dimensions that are in millimeters and are shown in parentheses.
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