Device for ejecting articles for an injection moulding machine for plastics

An ejector device for ejecting articles for injection moulding machines for plastic materials, said injecting moulding machine comprising:

• a mould half (20) defining a profile whereon a moulded article (21) is formed,
• a movable mould-holding plate (13) supporting said mould half (20), and
• a double toggle mechanism comprising connecting rods (18) connected to said movable mould-holding plate (13) for translational movement thereof, said device (200) for ejecting articles comprising:
• a movable ejector plate (3) supported in translation by means of supporting columns (4) fixed to said movable mould-holding plate (13), and
• a pin (2) connected to said movable ejector plate (3) and acting on an ejector table (1) to favour ejection of the moulded article (21) from said profile of the mould half (20),
• characterized in that it comprises a lever mechanism for translational movement of said movable ejector plate (3), said lever mechanism comprising at least one lever (33) which provides a resistance arm hinged to said movable ejector plate (3), a power arm hinged to actuator means, and a fulcrum pivoted in said movable mould-holding plate (13);
• said double toggle mechanism having a pair of upper connecting rods (18) and a pair of lower connecting rods (18), and said lever (33) being pivoted in its fulcrum by means of a gudgeon (34) coinciding with the hinge axis of the pair of lower connecting rods (18) of the double toggle mechanism on the movable mould-holding plate (13).