To form a multilayer plastic lens, a plurality of intermediate layers of a plastic material are injected one after another onto a basic part in an injection molding device in different cavities, wherein at least some of the cavities have a common first runner system with a common material feed. At least its [sic—“one”—“seine” is an obvious typo for “eine” meaning “one”—Tr.Ed.] outer layer consisting of a plastic material is then injected in a cavity by means of a second runner system, the second runner system having a material feed of its own and a control of its own.

To form a multilayer plastic lens, a plurality of intermediate layers of a plastic material are injected one after another onto a basic part in an injection molding device in different cavities, wherein at least some of the cavities have a common first runner system with a common material feed. At least its [sic—“one”—“seine” is an obvious typo for “eine” meaning “one”—Tr.Ed.] outer layer consisting of a plastic material is then injected in a cavity by means of a second runner system, the second runner system having a material feed of its own and a control of its own.

An injection molding apparatus including: a valve pin driven by an actuator, the valve pin extending axially through at least a portion of the channel length of the fluid flow channel, the fluid flow channel including a throat, downstream flow of the injection fluid being restricted by a bulb portion of the pin, the valve pin having an intermediate position where downstream flow of injection fluid is unrestricted and a fully downstream position where downstream flow of injection fluid is stopped at both the gate and at the throat, wherein the actuator is driven by a valve assembly comprised of a spool mechanically driven by first and second actuators or solenoids that each separately engage the spool at opposing axial ends to effect movement of the spool back and forth between the drive fluid flow positions.

A macromolecule forming mold, which is integrally formed by a polymer body. Multiple communicated runners are formed inside the polymer body; a material injection port is penetrated in the surface of the polymer body, and the material injection port is communicated with the runners, so that a thermosetting castable fills the runners by means of the material injection port and is cured and molded, and the polymer body is damaged to take out a thermosetting elastomer. A thermosetting elastomer and a manufacturing method therefor. The thermosetting elastomer has the characteristics such as excellent physical properties and lightweight properties.

Method for injection moulding one or more parts using an injection moulding machine and tool including at least one mould cavity, and a feed system comprising at least one gate and at least one runner that is located upstream of the at least one gate. The at least one runner includes at least one moveable wall and the method includes changing at least one cross-sectional dimension of the at least one runner by moving the at least one moveable wall in order achieve at least one of to vary a flow rate of material in the at least one runner, to apply a holding pressure to material in the at least one runner and consequently to the at least one mould cavity, or to compress residue in the at least one runner.

Method for injection moulding one or more parts using an injection moulding machine and tool including at least one mould cavity, and a feed system comprising at least one gate and at least one runner that is located upstream of the at least one gate. The at least one runner includes at least one moveable wall and the method includes changing at least one cross-sectional dimension of the at least one runner by moving the at least one moveable wall in order achieve at least one of to vary a flow rate of material in the at least one runner, to apply a holding pressure to material in the at least one runner and consequently to the at least one mould cavity, or to compress residue in the at least one runner.

The invention relates to a cold runner block in a vertically operating injection molding machine for processing elastomer materials with an upper fixed molding platen and a molding platen arranged thereunder which is movable relative to the fixed molding platen, between which a molding tool having a plurality of mold cavities is arranged and wherein the cold runner block is arranged between the fixed molding platen and the molding tool, the cold runner block containing a distribution plate having the cold runners and containing a nozzle plate with nozzles each assigned to one of the plurality of mold cavities, which is characterized in that the distribution plate formed from a plurality of distribution strips (10-40) is arranged on a retaining plate (2), which can be fastened to the fixed, feed-side molding platen in such a way that each distribution strip (10-40) is connected by means of two bolts (3) to the retaining plate (2) in that the head (5) of each bolt (3) facing away from the distribution strip (10-40) forms a retaining element which is T-shaped in section, the retaining element being displaceably guided in the direction transverse to the distribution strip's longitudinal axis in guide rails (50) which are formed in the retaining plate (2) and are designed in section to complement the bolt head (5).

A modular barrel and screw assembly for use in injection molding including a barrel having a barrel body, a separate barrel injection portion and a separate barrel end cap, with the barrel end cap being removably connected to the barrel injection portion and the barrel injection portion being removably connected to the barrel body, and a screw assembly having a screw tip assembly removably connected to a screw portion, wherein an injection chamber having a shot volume is defined by the barrel injection portion, the barrel end cap and the screw tip assembly. The modular barrel and screw assembly enables servicing of the barrel injection portion, barrel end cap and/or screw tip assembly without requiring removal of the barrel body, and enables use of a plurality of alternative corresponding separate barrel injection portions, separate barrel end caps and tip assemblies that provide a plurality of different shot volumes.

A modular barrel and screw assembly for use in injection molding including a barrel having a barrel body, a separate barrel injection portion and a separate barrel end cap, with the barrel end cap being removably connected to the barrel injection portion and the barrel injection portion being removably connected to the barrel body, and a screw assembly having a screw tip assembly removably connected to a screw portion, wherein an injection chamber having a shot volume is defined by the barrel injection portion, the barrel end cap and the screw tip assembly. The modular barrel and screw assembly enables servicing of the barrel injection portion, barrel end cap and/or screw tip assembly without requiring removal of the barrel body, and enables use of a plurality of alternative corresponding separate barrel injection portions, separate barrel end caps and tip assemblies that provide a plurality of different shot volumes.

A method for producing a part consisting of a polymer material involves injection-moulding said polymer material in a mould comprising a main section for forming the part and an additional section for forming an add-on for the part. The additional section is arranged between the injection point and the main section. The part and the add-on are separated by cutting.