Actuation apparatus for the movable mold halves or parts of an i

Details Actuation apparatus for the movable mold halves or parts of an i Actuation apparatus for the movable mold halves or parts of an i

1975-10-28

1977-05-03

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Mold opening and closing means and segmented female mold

Articulated link

74520, B29C 302

Patent

active

040211827

ABSTRACT:
The actuation apparatus for the movable mold parts or halves of an injection molding machine, especially for the manufacture of foamed plastic articles, comprises pairs of toggle-lever rods with the toggle-lever rods of each pair being movable in essentially parallel planes which are spaced from one another. The toggle-lever rods of each pair are arranged between a movable mold support plate and a stationary toggle plate, and can be conjointly selectively extended or retracted by means of a driven toggle head. The planes within which the toggle-lever rods operate extend obliquely across the movable mold support plate and the toggle plate, and the pairs of toggle-lever rods are arranged symmetrically on opposite sides of a vertical plane of symmetry containing the central longitudinal axis of the machine. The points of application of the forces of the toggle-lever rods of each pair at the mold support plate and the toggle plate, are in vertically spaced alignment with each other and such points are located, in the plane of each plate, at the corners of rectangles or squares. The essentially parallel planes of the pairs of toggle-lever rods on respective opposites sides of such plane of symmetry are inclined towards one another at equal angles to such plane of symmetry.

REFERENCES:
patent: 2447256 (1948-08-01), Knowles
patent: 3359598 (1967-12-01), Bucy

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