In a parting locking device for an injection molding mold assembly, a first engagement element and a first spring are mounted in the base holder. With a locking plate inserted in a plate insertion hole, the first engagement element moves to a locking position where the base holder and a locking member are coupled together. When a locking bar is pulled out of a bar insertion hole, the first engagement element is pushed and moved to an unlocking position where the base holder and the locking member are uncoupled from each other.

In a parting locking device for an injection molding mold assembly, a first engagement element and a first spring are mounted in the base holder. With a locking plate inserted in a plate insertion hole, the first engagement element moves to a locking position where the base holder and a locking member are coupled together. When a locking bar is pulled out of a bar insertion hole, the first engagement element is pushed and moved to an unlocking position where the base holder and the locking member are uncoupled from each other.

An injection molding includes: a clamping mechanism (conversion mechanism and toggle mechanism) for moving a fixed platen that retains a fixed die toward a fixed platen that retains a fixed die to bring the fixed die and the movable die into contract, and generating a clamping force therebetween; a drive source (mold opening/closing motor) for driving the clamping mechanism; a clamping force detection unit for detecting the clamping force; an elongation value detection unit for detecting an elongation value indicating the amount of elongation of a tie bar that extends as the clamping force is generated; and an abnormality determination unit for determining an abnormality in the injection molding machine on the basis of the ratio of the elongation value and the clamping force.

An injection molding includes: a clamping mechanism (conversion mechanism and toggle mechanism) for moving a fixed platen that retains a fixed die toward a fixed platen that retains a fixed die to bring the fixed die and the movable die into contract, and generating a clamping force therebetween; a drive source (mold opening/closing motor) for driving the clamping mechanism; a clamping force detection unit for detecting the clamping force; an elongation value detection unit for detecting an elongation value indicating the amount of elongation of a tie bar that extends as the clamping force is generated; and an abnormality determination unit for determining an abnormality in the injection molding machine on the basis of the ratio of the elongation value and the clamping force.

Embodiments of the invention provide a self-sufficient sequential locking device and an injection molding tool. The self-sufficient sequential locking device comprises an elongate body having two ends which are provided with first and second inner engagement elements respectively; first and second outer engagement elements selectably engageable with the first and second inner engagement elements respectively for alternatively establishing a first or a second connection by rotation of the elongate body between a first position in which the first connection is secured and the second connection is simultaneously releasable, and a second position in which the second connection is secured and the first connection is simultaneously releasable, and first and second locking element respectively cooperable with the first and second inner engagement element for securing the first connection when the elongate body is in the first position or the second connection when the elongate body is in the second position.

Embodiments of the invention provide a self-sufficient sequential locking device and an injection molding tool. The self-sufficient sequential locking device comprises an elongate body having two ends which are provided with first and second inner engagement elements respectively; first and second outer engagement elements selectably engageable with the first and second inner engagement elements respectively for alternatively establishing a first or a second connection by rotation of the elongate body between a first position in which the first connection is secured and the second connection is simultaneously releasable, and a second position in which the second connection is secured and the first connection is simultaneously releasable, and first and second locking element respectively cooperable with the first and second inner engagement element for securing the first connection when the elongate body is in the first position or the second connection when the elongate body is in the second position.

The production of multicomponent parts (4) which include a functional part (3), in particular a hollow needle, onto which a plastic molding (2), in particular a syringe barrel (2), is molded. In order to be able to convert the injection molding device quickly and conveniently, the device has a changing device (11), by which it is possible optionally to move functional part holders (7, 8, 9), matched to different types of functional parts, and/or a functional part holder (8) and a placeholder element (10) into the use position thereof in front of a mold cavity (6) of the injection mold (5) of the injection molding device (1).

The production of multicomponent parts (4) which include a functional part (3), in particular a hollow needle, onto which a plastic molding (2), in particular a syringe barrel (2), is molded. In order to be able to convert the injection molding device quickly and conveniently, the device has a changing device (11), by which it is possible optionally to move functional part holders (7, 8, 9), matched to different types of functional parts, and/or a functional part holder (8) and a placeholder element (10) into the use position thereof in front of a mold cavity (6) of the injection mold (5) of the injection molding device (1).

A mould lifting device is suitable for use in lifting and rotating a middle mould. At each of two lateral surfaces of the middle mould is provided a pivot portion. The mould lifting device includes: a platform, two longitudinal guide assemblies, two transmissions, a power assembly, two lifting members, two push members, two pivot arms, and two covers. When the pivot arms lift and rotate the middle mould, the lifted portion of the covers will not be pushed by the lifting portions of the lifting members anymore, and the covers will naturally pivot downward by gravity to make the cover portions cover the openings of the restricting grooves, which prevents the disengagement of the pivot portions of the middle mould from the restricting grooves, and thus improving the stability and security of the middle mould during the course of lifting and rotation.

A mould lifting device is suitable for use in lifting and rotating a middle mould. At each of two lateral surfaces of the middle mould is provided a pivot portion. The mould lifting device includes: a platform, two longitudinal guide assemblies, two transmissions, a power assembly, two lifting members, two push members, two pivot arms, and two covers. When the pivot arms lift and rotate the middle mould, the lifted portion of the covers will not be pushed by the lifting portions of the lifting members anymore, and the covers will naturally pivot downward by gravity to make the cover portions cover the openings of the restricting grooves, which prevents the disengagement of the pivot portions of the middle mould from the restricting grooves, and thus improving the stability and security of the middle mould during the course of lifting and rotation.