초록 ▼

A product ejector in a motor-driven, direct-acting type hydraulic mold clamping system, which includes a rod mounted on a ball screw for driving a moving platen at a forward end of the screw on the side of the platen, so that the rod is immovable axially and engageable with and disengageable from an

A product ejector in a motor-driven, direct-acting type hydraulic mold clamping system, which includes a rod mounted on a ball screw for driving a moving platen at a forward end of the screw on the side of the platen, so that the rod is immovable axially and engageable with and disengageable from an ejector plate attached to an ejector bar slidably arranged within a bore in the platen. When the platen moves rearwardly, the ejector plate, moving together with the platen, is abutted against the rod. As the platen moves farther rearwardly, the rod causes the ejector bar to project into a mold mounted to the platen, against the force of a spring inteposed between the ejector plate and the platen, to eject a molded article.

대표청구항 ▼

A direct-acting type mold clamping system for an injection machine comprising: a stationary rear platen; a ball screw rotatably but axially immovably supported by said rear platen; means for rotating said ball screw; a ball nut threadably engaged with said ball screw; a moving platen having a mold m

A direct-acting type mold clamping system for an injection machine comprising: a stationary rear platen; a ball screw rotatably but axially immovably supported by said rear platen; means for rotating said ball screw; a ball nut threadably engaged with said ball screw; a moving platen having a mold mounted thereto; means for fixedly connecting said ball nut to said moving platen, said ball nut being unrotatable with respect to said ball screw whereby rotation of said ball screw effects movement of said moving platen to carry out mold clamping and unclamping; and a mold product ejector, said product ejector comprising: a rod mounted to a rearward end of said ball screw; an ejector bar arranged within a bore provided in said moving platen such that the ejector bar extends through the bore and is slidable therein to project into the mold and eject a product therefrom; an ejector plate fixedly mounted to an end of said ejector bar and engageable with said rod upon movement of said moving platen; and a spring positioned between said ejector plate and said moving platen, for biasing said ejector bar toward said ball screw.