| 摘要 |
A method and apparatus for controlling the amount of resin in cylinders of injection molding machines is disclosed. In the control method, a control shaft (6) is rotated, so that a worm gear (5) of the control shaft is rotated to rotate a stroke control gear (3), thus rotating a rotative shaft (4), which is coupled to the center of the stroke control gear, and moving a stroke plate (8) upwards or downwards in response to the rotating motion of the rotative shaft. A cylinder is actuated such that a piston (10), coupled to a valve pin (11), is moved upwards and downwards relative to the stroke plate (8). The control apparatus includes a cylinder cap (2) mounted to the center of a cylinder cover (12) assembled with a cylinder housing (1). The rotative shaft (4) is mounted to the center of the cylinder cap (2) and engages with the stroke control gear (3), with an externally threaded part (9) formed at the lower part of the rotative shaft (4). A motor-operated or hand-operated control shaft (6) having a worm gear (5) is placed at an end of the stroke control gear (3). The stroke plate (8) having an internally threaded part (7) is installed in the stroke control gear (3) such that the internally and externally threaded parts (7, 9) engage with each other, thus controlling the height of the stroke plate (8) and controlling the stroke of the piston (10).
|
