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US 4,285,661 AGranted
Valve nozzle of injection molding machine
AssigneeOsaka City
InventorsAkira Yotsutsuji, Seiichi Ueda, Kiyoshi Uemura
Life of this patent
Estimating the term…
Abstract
A valve nozzle is used at an end of a hot runner or an injection molding machine for an injection molding. The valve nozzle comprises a cylinder as a body of the nozzle, and a piston. The cylinder has a gate and has a larger inner diameter at the rear end and a smaller inner diameter at the front end. The piston has a passage in the piston and has a large outer diameter at the rear end and a smaller outer diameter at the front end.
Claims4
A valve nozzle for an injection molding machine cooperable with a mold cavity, comprising:
- a cylinder;
- a longitudinal bore in said cylinder, said bore having a first portion of a first predetermined diameter at a first end of said cylinder and a second portion of second predetermined diameter at a second end of said cylinder, said second diameter being smaller than said first diameter;
- an injection molding compound inlet to said bore at said first end;
- an injection molding compound outlet from said bore at said second end, said outlet extending perpendicular to said bore;
- a piston slidable in said bore, said piston having a first portion of said first predetermined diameter at said first end and a second portion of said second predetermined diameter at said second end, said piston including at least one passage extending through said first and second portions;
- a valve stem extending from said piston toward said outlet and extendable into said mold cavity;
- and
- a valve fixed to said stem adjacent said outlet, said valve forming a disk coaxial with said bore and seating upon said perpendicular outlet.
5 more elements
Dependencies are inferred from the claim text.