A production apparatus of a two-layer preform including an inner layer preform and an outer layer preform includes: an outer layer cavity mold for injection-molding the outer layer preform. A bottom surface of the outer layer cavity mold is provided with a protrusion for separating the inner layer preform disposed in the outer layer cavity mold from the bottom surface.

A molding mold in which gates are provided at outlets of runners and connected to cavity portions and a molding material is fed from inlets of the runners to fill the cavity portions to mold molded products includes gate cutters attached so as to be able to advance/retract, and the gate cutters are attached such that advancing/retracting directions thereof intersect axes connecting the inlets and the outlets of the runners.

A module or unit manufactured allowing simplified installation of a lifter rod assembly of a core lifter apparatus for a mold for molding plastic parts. In some embodiments, a slide is movably mounted with respect to a retainer and/or a gib, so that the retainer attached to the lifter rod can be moved in a linear direction and a rotational direction to provide free motion and reduce wear and breakage due to uneven ejector plate movement during production cycling of the mold. In some embodiments, the slide has one or more spring-loaded devices that hold the retainer in a particular position with respect to the slide, positioned to receive the lifter rod during mold assembly. In some embodiments, the retainer accommodates connections and coiled hoses for delivering cooling fluid to an internally cooled lifter rod.

A method for forming a container assembly having a lid, a container and a cooperative closure mechanism, includes providing a lid form and flexible members biased toward the lid form, wherein the lid form and the flexible members are operable between a forming position defined by the lid form exerting a biasing force against the flexible members, and an extraction position defined by the biasing force being substantially removed from the flexible members, creating a lid form cavity defined by the lid form and the flexible members disposed in the forming position, injecting a lid material throughout the lid form cavity to form a lid, disposing the lid form and the flexible members in the extraction position, wherein the lid form is moved distal from the lid and the flexible members are biased away from the lid to separate the lid from the flexible members.

An undercut processing mechanism includes: a molding core for forming an undercut portion; an inclined pin slidable in a first direction inclined relative to a die opening direction of a molding die during the removal of a molded product from the die; and a guide rail for guiding the movement of the inclined pin. The inclined pin has a slide block movable in contact with the guide rail. The guide rail is so formed as to contact the slide block over the entire stroke of the inclined pin so that the first direction of movement of the inclined pin may be regulated, and is also so formed as to have a shape of a high bending rigidity in a particular direction of the slide block.

The ejection device comprises: a pushing device (14) translatable along a first axis (A1) between a retracted position and an ejection position, an ejection element (28) translatable along a second axis (A2) between a retracted position and an ejection position, a transfer device (26) connecting the pushing device (14) and the ejection device (28).

The transfer device (26) comprises at least two links (44), translatable relative to one another and relative to the pushing device (14) and the ejection element (28).

A mold includes a core in which a molded product is formed, the core comprises a cored body and a sliding core on the core body, separable from the core body in a first direction with respect to the core body, and an ejector to press the sliding core in the first direction to separate the molded product formed in the core from the core. The ejector includes a driver positioned below the core and movable toward a lower surface of the core in the first direction or away from the lower surface of the core in a direction opposite to the first direction, and a rod movable in the first direction to press the sliding core to be separated from the driver or movable in the direction opposite to the first direction to couple the sliding core with the driver, and the rod is movable further in the first direction than the driver.

A core lifter having lifter bar with an elongate blade which carries a coupling head received in an elongate lifter bar coupling receiver formed in the base configured to permit pivotable, swiveling and/or translational misalignment or tolerance compensation during core lifter assembly, installation, and operation in a plastic formable material molding apparatus, including during mold cycling advantageously preventing core lifter binding and extending core lifter life. A preferred lifter has a lifter bar formed of a blade to which a lifter bar coupling ball is attached that is received in an elongate longitudinally extending channel having a transverse cross section complementary to the ball defining a bearing race in which the ball is received enabling slidable pivoting, swiveling and slidable movement of the ball and blade relative thereto including while the ball and blade are slidably moving along the race in a longitudinal or lengthwise direction relative to the base.

A core lifter having a lifter bar assembly formed of an elongate lifter bar with a replaceable lifter bar extension coupling carrying a coupling ball pivotably, rotatably, and translationally coupled to a lifter base fixed to an ejector plate of a plastic injection molding apparatus, the bar extension coupling removably coupled to the bar by a coupling joint configured to automatically self-align the bar relative to the base and mold in which the bar extends in a direction generally orthogonal to a lengthwise extent of the bar. Bar extension coupling is formed of an extension link having one end carrying the ball and an opposite end slidably coupled to an end of the bar by coupling joint. A preferred extension link is of breakaway sacrificial construction and slidably attached to the bar via a coupling joint that is a floating dovetail joint.

There is provided a method for non-penetration joining of members. The method includes: keeping a joining member having a protruding part by a receiving mold so that the protruding part is exposed; placing a joined member over the joining member so that the protruding part of the joining member is positioned in a blind hole of the joined member, and compressing the joined member against the receiving mold to plastically deform the joined member and the joining member at the same time and to wrap excess thickness of the joined member around an undercut part while forming the undercut part on the joining member, thereby non-detachably joining both the members.