Vertical injection molding machine

Abstract

A vertical injection molding machine having an upper die (26) and a lower die (27) which are adapted to be brought together in the vertical direction by the force produced by a die closing device. The injection molding machine has an injection unit 1 disposed below the lower die (27) and is hinged through a hinge shaft (36) to a truck (35) movable along rails (37), such that the injection unit 1 is swingable vertically about the axis of the hinge shaft (36). The vertical swinging motion of the injection unit 1 is effected by cylinders (38) connected to an injection head (2) of the injection unit (1). A compression forming cylinder device (70) is provided on the lower end of each of a plurality of tie-bars which are connected between the upper die (26) and the lower die (27). Each of the compression forming cylinder devices (70) operates to urge the upper die (26) upward away from the lower die (27 ) through a pressing member (68), thus creating a small clearance between the upper die (26) and the lower die (27) when these dies are held in the closing position by the force of a die closing device (3).

Dependencies are inferred from the claim text.