发明名称 |
Coated pelletizing extrusion dies and method for making the same |
摘要 |
A pelletizing extrusion die comprising a die body contains a plurality of extrusion holes. Each of the extrusion holes is defined by a defining surface of the die body wherein at least a portion of the defining surface has a low-friction coating deposited thereon. A method for applying the low-friction coating to the defining surface wherein the applying step occurs at a temperature equal to less than about 520° C. |
申请公布号 |
US9314985(B2) |
申请公布日期 |
2016.04.19 |
申请号 |
US201213525536 |
申请日期 |
2012.06.18 |
申请人 |
KENNAMETAL INC. |
发明人 |
Brahmandam Sudhir;Siddle Dave;Spitsberg Irene |
分类号 |
B29C47/12;B30B11/22;B60J10/00;B29C47/08;B29B9/06;B29C47/00;B29C47/30 |
主分类号 |
B29C47/12 |
代理机构 |
|
代理人 |
Meenan Larry R. |
主权项 |
1. A pelletizing extrusion die comprising a cylindrical die body containing a plurality of extrusion holes extending radially through the cylindrical die body, and wherein each of the extrusion holes being defined by a defining surface of the cylindrical die body wherein at least a portion of the defining surface having a metallurgically-bonded low-friction coating deposited thereon so that the metallurgically-bonded low-friction coating has a substantially constant thickness, and wherein the cylindrical die body having an inner cylindrical face and an outer face, the defining surface having a generally frusto-conically shaped unobstructed entrance section adjacent to the inner cylindrical face and an exit section extending from the entrance section to the outer face, and the metallurgically-bonded low-friction coating being applied on along the frustoconically shaped entrance section of the defining surface and the exit section of the defining surface, wherein the low-friction coating has coefficient of friction equal to less than about 0.5, and wherein the metallurgically-bonded low-friction coating has a thickness between about 20 microns and about 200 microns, wherein the low-friction coating is configured to reduce friction loading and to lower operation temperature. |
地址 |
Latrobe PA US |