Injection molding hot runner nozzle with removable seal
AssigneeD-M-E Company
InventorsFrank J. Eigler, Rui Novo
Life of this patent
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Abstract
A flow nozzle (10) that conveys plastic melt from an injection unit of a molding machine to a mold cavity (72) has an improved, removable seal design. The nozzle body (12) is designed to threadedly receive a nozzle tip (24) that includes an outlet (30) that communicates with the mold cavity. A thin-wall, cylindrical seal ring (40) includes a compression portion that is received between the nozzle body and nozzle tip and is compressed to create a seal between these two elements when the tip is assembled to the nozzle body. The seal ring further includes a sealing portion (50) that encircles the nozzle tip and has an outer diameter slightly larger than the outer diameter of the nozzle body.
Claims7
A flow nozzle (10) to convey plastic melt to a mold cavity (72), the flow nozzle (10) including a nozzle body (12) having a central passageway (18) that extends from a plastic melt inlet to an outlet (30), and a nozzle tip (24) threadedly received in the nozzle body (12), the nozzle tip (24) being configured to be received in a mold gate 70 and to include the outlet (30) that communicates with the mold cavity (72), characterized in that the flow nozzle (10) further comprises a thin-wall, cylindrical seal ring (40) having a compression portion (42) that is received between the nozzle body (12) and nozzle tip (24), such that the compression portion (42) of the seal ring (40) is compressed to create a seal between the nozzle body (12) and nozzle tip (24) when the tip is assembled to the nozzle body (12), the seal ring (40) also having an outer sealing portion (50) that encircles the nozzle tip (24).
Dependencies are inferred from the claim text.