CAVITY AND CORE COMPONENTS Runner Shut-Off Inserts – Applications
U.S. Patent No. 5,208,053
DME Runner Shut-Off Inserts provide a precise method of blocking or directing material flow to one or more cavities in multi-cavity or family molds. • Safer and more positive than the use of brass or ejector pins • Saves material • Reduces scrap and sorting • Improves cycle time Inserts are supplied unmachined as shown in background of photo. Foreground shows sample runner machining, typically done with insert installed in mold.
Typical Applications
BRASS ROD RECOMMENDED
SCREWDRIVER END OF BRASS ROD MUST FIT IN THE CENTER CORE RUNNER SLOT ONLY – DO NOT
A
A
ROTATE THE OUTER RING
OUTER RING CENTER CORE
LOCATING GROOVE
LOWER BODY
SPRING PLUNGER
SECTION A A
Runner Shut-Off Inserts are shown above in the open position, which allows material to flow to all cavities.
By rotating the center core of the Runner Shut‑Off Insert 90° or 180° with the screwdriver end of a brass rod, material flow to one or several cavities can be shut off, as shown above.
NOTE: Spring plunger in Runner Shut-Off Insert engages a locating groove in the center core. This holds the center core in position at each 90° rotation of the center core, thus providing several combinations of runner shut-off positions.
HOLE FOR SPRING PIN Ø D *
INFORMATION KEY: C = Depth of Runner D = Diameter
Runner Shut-Off Inserts – MRS
L = Length R = Radius W = Width of Runner Material: Stainless Steel Hardness: 50 ± 3 HRC Max. Temp: 120°C (250°F) Dimensions: All dimensions are in inches, except as noted
ITEM NUMBER
L LENGTH .885 (22.5MM) .885 (22.5MM)
Ø D
.5118 (13MM) .6299 (16MM) 1.0236 (26MM)
MRS 0013
L
MRS 0016
1.260 (32MM)
MRS 0026
All dimensions are in inches except for several parenthetical reference dimensions in millimeters.
*MEASURE Ø D IN THIS AREA ONLY. TOP AND BOTTOM OF INSERT HAVE A VERY SLIGHT RELIEF FOR PROPER INSTALLATION AND OPERATION.
DO NOT ADJUST SPRING PLUNGER. IT HAS BEEN SUPPLIED INSTALLED TO THE CORRECT POSITION.
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