A mold tool assembly includes a first tool having a protrusion for producing a respective hole in a foam body and a second tool configured to cooperate with the first tool to mold the foam body. The second tool defines a cavity corresponding to the protrusion. The mold tool assembly also includes a movable plunger for clearing flash corresponding to and located at least partially within the cavity in the second tool, and movable between a disengaged position when the first and second tools are separated, and an engaged position when the first and second tools are closed. The mold tool assembly also includes an actuator configured to move the movable plunger between the engaged position and the disengaged position. In the engaged position, the movable plunger contacts the protrusion to seal the cavity, and in the disengaged position, at least a portion of the movable plunger extends below a bottom surface of the second tool into the hole.