The present invention provides an injection mold for blank of dental implant, which is configured with a screw driving/reversing mechanism, an inner thread forming rod, an axial sliding member, an elastic element, a first sliding block, a second sliding block, in which the parting line of the first sliding block and the second sliding block just passes and forms the first unthread surface and the second unthread surface of the blank. During injection, the screw driving/reversing mechanism is used to drive the inner thread forming rod advancing spirally and pushing the axial sliding member during advancing to an injection positioning point for forming a polygonal inner conical section of the blank. When the injection is completed, the screw driving/reversing mechanism makes the inner thread forming rod reverse spirally, such that the elastic element enables the axial sliding member reversing therewith until both the inner thread forming rod and the axial sliding member are completely released from the blank.一種人工牙根植體之坯體的射出模具,設有一螺旋進退機構、一內螺紋形成棒、一軸向滑動件,一彈性元件、一第一滑動模塊及一第二滑動模塊,其中第一滑動模塊與第二滑動模塊的分模線剛好通過並形成坯體的第一去螺紋面與第二去螺紋面。於進行射出時,螺旋進退機構係用以驅動內螺紋形成棒螺旋前進,並於前進時將軸向滑動件推頂到一射出定位點以形成坯體的多角形內錐段;當射出完成時,螺旋進退機構使內螺紋形成棒螺旋地後退,這時彈性元件使軸向滑動件隨之後退,直到內螺紋形成棒與軸向滑動件兩者完全脫離坯體為止。41‧‧‧第一滑動模塊42‧‧‧第二滑動模塊44‧‧‧螺旋進退機構45‧‧‧內螺紋形成棒46‧‧‧軸向滑動元件47‧‧‧導柱48‧‧‧彈性元件50‧‧‧坯體51‧‧‧內螺紋段52‧‧‧多角形內錐段53‧‧‧第一外螺紋段55‧‧‧第二外螺紋段411‧‧‧螺紋形成面412‧‧‧去螺紋面421‧‧‧螺紋形成面422‧‧‧去螺紋面
