초록 ▼

A hot runner system including a shoot pot system for transferring melt from a single shooting pot to multiple nozzles. Melt is fed from a source of melt into the cavity through the multiple nozzles, and a valve isolates melt in the cavity from melt in the source. A plunger within the cavity is drive

A hot runner system including a shoot pot system for transferring melt from a single shooting pot to multiple nozzles. Melt is fed from a source of melt into the cavity through the multiple nozzles, and a valve isolates melt in the cavity from melt in the source. A plunger within the cavity is driven forward to inject melt in the cavity into a mold cavity at high pressure without significantly increasing the pressure of melt in the source. The plunger optionally functions as both the plunger and the valve by opening and closing communication between the cavity and the manifold as it is rotated.

대표청구항 ▼

What is claimed is: 1. An injection apparatus, comprising:a housing defining a cavity therein, said cavity in fluid communication with a source of melt and a plurality of nozzles, said housing further defining an injection outlet at a first end thereof;a plunger in sliding communication with said ca

What is claimed is: 1. An injection apparatus, comprising:a housing defining a cavity therein, said cavity in fluid communication with a source of melt and a plurality of nozzles, said housing further defining an injection outlet at a first end thereof;a plunger in sliding communication with said cavity, said plunger operable for movement toward said injection outlet; anda selectively closable valve, wherein said valve substantially isolates said cavity from said source,wherein said cavity comprises at least one wall surface, said plunger being operable for sliding movement relative to said wall surface, and wherein said valve is arranged at said wall surface, andwherein said valve is selectively opened and closed by movement of said plunger relative to said wall surface of said cavity.