Injection manifold having a valve pin guiding device
AssigneeMold-Masters Limited
InventorsNeil Dewar, Denis Babin
Life of this patent
Estimating the term…
Abstract
A guide for a manifold plug of an injection molding apparatus comprises a guide body projecting from an inner wall of the manifold plug diametrically opposing an inlet of a manifold plug channel formed in the manifold plug. The inlet is aligned with a manifold channel of a manifold. The outlet of the manifold plug channel is aligned with a nozzle channel of a nozzle. The inlet is at an angle to the outlet. A guide surface is provided on the guide body for abutting a downstream portion of a valve pin extending into the manifold plug channel. The guide also facilitates flow of a melt stream of moldable material through the manifold plug channel.
Claims21
An injection molding apparatus comprising:
- a manifold having a manifold channel for receiving a melt stream of moldable material under pressure;
- a manifold plug provided in said manifold, said manifold plug having a manifold plug channel formed therein, said manifold plug channel having an inlet receiving the melt stream from said manifold channel and an outlet delivering the melt stream to a nozzle channel of a nozzle, said manifold plug channel undergoing a change in direction between said inlet and outlet;
- a mold cavity receiving said melt stream from said nozzle, said nozzle channel communicating with said mold cavity through a mold gate;
- a valve pin passing through a bore provided in said manifold plug and extending into said manifold plug channel and said nozzle channel, said valve pin being movable to selectively open and close said mold gate;
- and
- a guide projecting from an inner wall of said manifold plug channel, diametrically opposing said inlet, said guide being located behind said valve pin and abutting a portion of said valve pin.
A manifold plug comprising:
- a manifold plug body including a manifold plug channel having an inlet and an outlet formed therein;
- a guide body projecting from an inner wall of said manifold plug body diametrically opposing said inlet, said inlet for aligning with a manifold channel of a manifold and said outlet for aligning with a nozzle channel of a nozzle, said inlet being at an angle to said outlet;
- and
- a guide surface provided on said guide body, said guide surface abutting a downstream portion of a valve pin extending through said manifold plug body.
An injection molding apparatus comprising:
- a manifold having a manifold channel for receiving a melt stream of moldable material under pressure and delivering said melt stream to a nozzle, said manifold channel undergoing a change of direction from an inlet to an outlet and being aligned with a nozzle channel of said nozzle;
- a mold cavity for receiving said melt stream from said nozzle, said nozzle channel communicating with said mold cavity through a mold gate;
- a valve pin extending through a bore provided in said manifold and through said nozzle channel, said valve pin being movable to selectively open and close said mold gate;
- and
- a guide projecting from an inner wall of said manifold channel, diametrically opposing said inlet for restricting the flow of said melt stream, said guide being located behind said valve pin and abutting a portion of said valve pin.
An injection molding machine comprising:
- a manifold having a manifold channel for receiving a melt stream of moldable material under pressure;
- a manifold plug provided in said manifold;
- a manifold plug channel formed in said manifold plug for receiving said melt stream from said manifold channel, said manifold plug channel undergoing a change of direction from an inlet to an outlet thereof, said inlet being aligned with said manifold channel and said outlet being aligned with a nozzle channel of a nozzle for delivering said melt stream to said nozzle;
- and
- a melt flow restriction element projecting from an inner wall of said manifold plug channel, diametrically opposing said inlet.
An injection molding machine comprising:
- a manifold having a manifold channel for receiving a melt stream of moldable material under pressure and delivering said melt stream to a nozzle, said manifold channel undergoing a change of direction from an inlet to an outlet;
- and
- a guide projecting from an inner wall of said manifold channel, diametrically opposing said inlet for restricting the flow of said melt stream.
Dependencies are inferred from the claim text.