The present invention relates to a perimeter ejector system for an injection molding apparatus comprising: a mold plate, housing a mold cavity consisting a molded material and at least one lifting pin configured to extend through at least one corner or edge of the mold cavity, in order to eject the molded material off the cavity space. The lifting pin further comprises a push surface shaped to match the profile of the mold cavity, thus forming an integral part of the mold cavity.