SYSTEM AND METHOD FOR ADJUSTING THE LAND CHANNEL LENGTH ON AN EXTRUSION DIE

摘要

An extrusion die with adjustable land channel can be formed of a die body that includes a first die body portion and a second die body portion, a first lip body, a second lip body, and a land channel body. The extrusion die can have a flow channel that includes a land channel terminating in an outlet orifice. The flow channel may be bound on one side by the first die body portion, the land channel body, and the first lip body. The flow channel may be bound on an opposite side by the second die body portion and the second lip body. In some examples, the length of the land channel is adjustable by configuring the land channel body and/or first lip body to move across the width of the flow channel.

主权项

1. An extrusion die comprising a die body, a first lip body, a second lip body, at least one land channel body, and a flow channel that includes a land channel terminating in an outlet orifice;
said die body including a first die body portion having a first flow channel face and a second die body portion having a second flow channel face; said first lip body being connected to said first die body portion and having a first lip face and said second lip body being connected to said second die body portion and having a second lip face, said first lip body and said second lip body forming the outlet orifice therebetween; said at least one land channel body having a land channel face positioned between said first flow channel face and said first lip face; the flow channel being bounded on one side by at least said first flow channel face, said land channel face, and said first lip face and on an opposite side by at least said second flow channel face and said second lip face; and said at least one land channel body being movable so as to adjust a length of the land channel.