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Draft

Draft is the small angle on surfaces that would otherwise be parallel to the direction of movement of mold members. This is particularly true for core pins. Draft is provided to facilitate the release and ejection of the molded form. The normal range is 0.5° to 2.0°. The actual amount of draft increases with the depth of the hole or recess being formed, as well as with the complexity of the component or addition of multiple cores. Figure 4 illustrates some of the circumstances that require draft.