US 10,518,457 B2Granted

Crosshead die

AssigneeThe Goodyear Tire & Rubber Company

InventorsHon Ho Liu, Deep Samanta, Srinath Madhavan, Hongbing Chen, Christopher David Dyrlund, Gary Robert Burg

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Abstract

The invention is directed to a crosshead die for the extrusion of a profile, such as a uniform ply coat for a tire. The crosshead die is used with an extruder, and includes a body. An inlet is formed in the body, and is in fluid communication with the extruder. An outlet and a flow channel are also formed in the body. The flow channel extends between the inlet and the outlet, and is bounded by an upper wall, a lower wall, a first side wall, and a second side wall. The flow channel is formed with a bend and a cross section that includes a trapezoidal shape to align the flow of elastomer with the center of the flow channel.

Claims8

Dependent claims

A crosshead die for use with an extruder, the crosshead die comprising:

a body;
an inlet formed in the body, the inlet being in fluid communication with the extruder;
an outlet formed in the body;
and
a flow channel formed in the body, the flow channel:
including a length extending from the inlet to the outlet;
being bounded by an upper wall, a lower wall, a first side wall, and a second side wall;
and
being formed with a bend, wherein the first side wall is disposed on an inside of the flow channel bend and the second side wall is disposed on an outside of the flow channel bend;
and
wherein a height of the first side wall is less than a height of the second side wall so that the flow channel is formed with a cross section that includes a trapezoidal shape, the trapezoidal shape extending for the length of the flow channel from the inlet formed in the body to the outlet formed in the body.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/161,319Filed 23 May 2016
Published: US 2017/0334119 A123 Nov 2017
Granted: 31 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

B29C 48/07
Characterised by the shape of the extruded material at extrusion: flat, e.g. panels
B29C 48/12
Characterised by the shape of the extruded material at extrusion: articles with an irregular circumference when viewed in cross-section, e.g.…
B29C 48/156
Incorporating preformed parts or layers, e.g. extrusion moulding around inserts: coating two or more articles simultaneously
B29C 48/16
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor: articles…