| 摘要 |
<p>Mould clamping appts. for an electric injection moulding machine which can eliminate deflection of a toggle mechanism and non-uniformity of a push force applied to a movable platen resulting from the former, is produced at a low cost and has excellent operation response. The appts. (1) is equipped with upper and lower toggle portions (6,7) including ball screws (61,71) symmetrical with each other and outwardly in a radial direction w.r.t. the axis of the appts. heads (62,72) meshing with the ball screws and links (63-65, 73-75) expanding and contracting with reciprocation of the heads along the ball screws, and each ball screw is connected directly to the output shaft of corresp. one of two servo motors (8,9) connected to a control circuit (20) contg. a pulse width modulation control circuit and two transistor inverters. Principal constit. components of the appts. are spaced apart from the axis and deflection of the toggle mechanism (6,7) and non-uniformity of a push force applied to the movable platen (5) due to deflection can be eliminated. Since each servomotor may be of compact type that can drive only one toggle portion, the mould clamping appts. is economical and has high operation response.</p> |
