Abstract: A mold assembly having at least one mold body with at least one cavity formed therein. The mold includes at least one mold insert coupling portion formed on the mold body; at least one mold insert being of substantially complementary size and shape with respect to the mold insert coupling portion, each insert being provided with a tapered guide surface for guiding the mold insert into the mold insert coupling portion; at least one means for clamping the mold insert in a predetermined position within the mold insert coupling portion. The mold insert is reciprocally movable within the mold insert coupling portion in a direction generally perpendicular to the parting line of the mold assembly.

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).