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Interlock Surface

The interlock surface surrounds the perimeter of the parting surfaces in a nearly perpendicular direction at (in most instances) a 5° taper. As with all drafted faces, the interlock surface drafts away from the parting line. Interlock surfaces are used to:

  • Seal the mold properly to prevent liquids from leaking.

  • Guide the tooling into place during the molding process.

  • Maintain alignment between the tooling entities.

  • Prevent shifts, uneven surfaces or incorrect wall thicknesses.

  • Minimize the cost of machining the mold plates across the split, because the area surrounding the interlock is planar.



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