Abstract: An injection molding machine (1) comprising a fixed mold half (4) mounted on a fixed plate (3) integral with the machine frame (2) and a moveable mold half (9) mounted on a moveable plate (8) supported in translation on the machine frame (2) and guided along guide columns (5) integral with the fixed plate (3), to pass from a mold closing position to a mold opening position, and a closing and clamping system (10) comprising clamping means, integral with the moveable plate (8) and acting on a portion of the guide columns (5) to lock the moveable plate (8) in the closing position.

Abstract: In a moulding machine for plastics comprising an injection assembly (1) mounted slidably on a frame of the machine and a moulding assembly (30) comprising a mould half (8) mounted on a fixed plate (6) integral with the machine frame, a movement apparatus (200) for the injection assembly comprises a chain transmission (209) connected to the injection assembly (1), a drive unit (211) that drives the chain transmission (209) to move the injection assembly (1) toward the moulding assembly (30) and return means (220) connected to the injection assembly (1) to allow the injection assembly (1) to be moved away from the moulding assembly (30).