PURPOSE: To enhance productivity by facilitating the taking out of a surveying stake, by a method wherein the surveying stake is pressed by a cylinder having high pressing force and a short stroke to be moved in a mold prior to work for taking out survey stake cooled and solidified.

CONSTITUTION: Molten plastic is allowed to fill a cylindrical mold 1 and solidified under cooling to be taken out as a surveying stake 40. Herein, in order t easily take out the surveying stake 40, a press cylinder 34 having high pressing force and a short stroke is used. This cylinder 34 is provided on the leading end side of the mold 1 and pushes the extrusion lever 36 connected to a piston rod 35 in the mold 1 from the raw material injection port 2 thereof. After a surveying stake 40 is slightly pressed and moved, said stake is retracted to be returned to the original position. The surveying stake 40 becoming easy to move in the mold 1 is taken out by pushing the take-out lever 39 connected to the piston rod 38 of a take-out cylinder 37 in the raw material injection port 2 of the mold 1 by the take-out cylinder 37 having low pressing force and a long stroke.