Collapsible Core & Collapsible Minicore - Roehr Tool Corporation

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COLLAPSIBLE CORECC 652 P.C. Core Dimensions (cont.)CENTER SCREWS ON MIDDLEOF LARGE SEGMENT2.380MAXSET-UP FOR GRINDINGREFER TO GRINDING INFORMATION 1.750 ±.005(NOTE 4)4.8004.000USE SCREWS TOALIGN CORE ON PININDICATE HERE FORGRINDING .003 MAX T.I.R.NOTES:1. Center pin to project .045 minimum/.075 maximum above frontface of Collapsible Core with .020 R minimum at corners. Seesuggested partial mold assembly view.2. Both ends of center pin to be cut off after grindingcontour on Collapsible Core before assembly in mold.3. Minimum suggested I.D. of thread or undercut is 2.890-S togive minimum steel support between depth of undercut andcenter pin.5. Consult Grinding Instructions.6. A 1/16 radius is essential on the inside corners of the stripperinsert, especially where shut-off contacts Collapsible Core.7. Thread must never be run out of face of core, leaving aknife-edge of material. For complete instructions, refer toDesign Procedures.8. Do not use center pin as a pilot into “A” half of mold.4. The 1.750 ±.005 dimension must be held in mold assemblyand core grinding.Questions? Call Roehr Tool Corporation at 978-562-4488 or Toll Free at 877-563-1912.77
COLLAPSIBLE CORECC 652 PC Mold Base Machining DimensionsSUBTRACT INTERNAL DEPTH OF PART PLUSMATERIAL SHRINK FROM THIS DIM. TO DETERMINEACTUAL STRIPPER PLATE THICKNESSRELIEF FORGREASE1.375CAVITYPLATESTRIPPERPLATE3.0001.875C-6.1870.875PLATE THICKNESS MAYVARY AS DESIRED1.3754.125 ±.005EJECTOR STROKE0.875 ±.0030.1871.000SUPPORTRINGPIN COOLINGDETAILSHUT-OFF DIMENSIONAS NEEDED(CHECK LIST 7 & 13)Ø3.832 ±.007Ø5.025Ø4.905 +.003-.000Ø5.025Ø4.905 +.003-.000Ø5.338BREAKSHARPEDGESØ4.467 +.005-.000Ø4.026 +.001-.000Ø2.775Ø2.714 +.001-.000A"O" RINGGROOVESECTION A:ABRASSWATERLINEBAFFLETAP 3 4 N.P.T.STRIPPERINSERTMUST BERETAINED0.8750.3750.62511.250 ±.004CORE O.A.L.(CHECK LIST 11)0.207 +.003-.0020.375 +.001-.0001.187 ±.0011.750 ±.005Ø3.155 +.005-.0000.312 NOMC'BORE AS NEEDEDTO HOLD 1.750±.005GRIND EJECTOR PLATE,SUPPORT RING & RESTBUTTONS TO THISDIM. 1.187 ±.001(CHECK LIST 1)Questions? Call Roehr Tool Corporation at 978-562-4488 or Toll Free at 877-563-1912.78
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Collapsible Core & Collapsible Minicore - Roehr Tool Corporation

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