A reconfigurable melt delivery system is disclosed for use with a first injection unit and a second injection unit. The reconfigurable melt delivery system may include a first arm manifold configured to receive a moldable material from a second injection unit, an exchangeable second arm manifold in fluid communication with the first arm manifold that is configured to receive the moldable material from the first arm manifold and to transfer the moldable material to an outlet nozzle, and a repositionable and replaceable insert plate configured to be repositioned or replaced relative to remaining plates of the melt delivery system, wherein the outlet nozzle is secured within a mold facing surface of the insert plate and is radially offset from a central machine nozzle opening of the melt delivery system for delivering the moldable material to a corresponding offset mold gate of a two-material mold.

An injection molding apparatus with hot runners includes a rear plate that supports at least one manifold, wherein a first face of the rear plate that contains the main manifold is in direct contact with a first face of the manifold plate substantially on the entire flat surface of the first face of the manifold plate which is not affected by the recesses which, in the manifold plate, accommodate the secondary manifolds.

The manifold plate has nozzles, and the actuators of the injection nozzles are completely external to the rear plate, are completely inside recesses of the manifold plate, and are arranged so that a respective piston cylinder is compressed between the first face of the rear plate and the secondary manifold.

A reconfigurable melt delivery system is disclosed for use with a first injection unit and a second injection unit. The reconfigurable melt delivery system may include a first arm manifold configured to receive a moldable material from a second injection unit, an exchangeable second arm manifold in fluid communication with the first arm manifold that is configured to receive the moldable material from the first arm manifold and to transfer the moldable material to an outlet nozzle, and a repositionable and replaceable insert plate configured to be repositioned or replaced relative to remaining plates of the melt delivery system, wherein the outlet nozzle is secured within a mold facing surface of the insert plate and is radially offset from a central machine nozzle opening of the melt delivery system for delivering the moldable material to a corresponding offset mold gate of a two-material mold.

A feed system for an injection molding method and machine includes a first part including a first channel, and a second part including a second channel, the first channel and the second channel forming a molten plastic feed conduit when the first part is located adjacent to the second part. A joint is formed between the first part and the second part along the first channel and the second channel and the joint is one of a sintered joint, a welded joint, and a brazed joint.