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Title: Magnetic feed material and its use in producing bonded permanent magnets by additive manufacturing

Abstract

A method for producing magnet-polymer pellets useful as a feedstock in an additive manufacturing process, comprising: (i) blending thermoplastic polymer and hard magnetic particles; (ii) feeding the blended magnet-polymer mixture into a pre-feed hopper that feeds directly into an inlet of a temperature-controlled barrel extruder; (iii) feeding the blended magnet-polymer mixture into the barrel extruder at a fixed feed rate of 5-20 kg/hour, wherein the temperature at the outlet is at least to no more than 10° C. above a glass transition temperature of the blended magnet-polymer mixture; (iv) feeding the blended magnet-polymer mixture directly into an extruding die; (v) passing the blended magnet-polymer mixture through the extruding die at a fixed speed; and (vi) cutting the magnet-polymer mixture at regular intervals as the mixture exits the extruding die at the fixed speed. The use of the pellets as feed material in an additive manufacturing process is also described.

Inventors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1735221
Patent Number(s):
10,766,181
Application Number:
15/796,110
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Resource Relation:
Patent File Date: 10/27/2017
Country of Publication:
United States
Language:
English

Citation Formats

Paranthaman, Mariappan Parans, Li, Ling, Kunc, Vlastimil, Post, Brian K., Rios, Orlando, Fredette, Robert H., and Ormerod, John. Magnetic feed material and its use in producing bonded permanent magnets by additive manufacturing. United States: N. p., 2020. Web.
Paranthaman, Mariappan Parans, Li, Ling, Kunc, Vlastimil, Post, Brian K., Rios, Orlando, Fredette, Robert H., & Ormerod, John. Magnetic feed material and its use in producing bonded permanent magnets by additive manufacturing. United States.
Paranthaman, Mariappan Parans, Li, Ling, Kunc, Vlastimil, Post, Brian K., Rios, Orlando, Fredette, Robert H., and Ormerod, John. 2020. "Magnetic feed material and its use in producing bonded permanent magnets by additive manufacturing". United States. https://www.osti.gov/servlets/purl/1735221.
@article{osti_1735221,
title = {Magnetic feed material and its use in producing bonded permanent magnets by additive manufacturing},
author = {Paranthaman, Mariappan Parans and Li, Ling and Kunc, Vlastimil and Post, Brian K. and Rios, Orlando and Fredette, Robert H. and Ormerod, John},
abstractNote = {A method for producing magnet-polymer pellets useful as a feedstock in an additive manufacturing process, comprising: (i) blending thermoplastic polymer and hard magnetic particles; (ii) feeding the blended magnet-polymer mixture into a pre-feed hopper that feeds directly into an inlet of a temperature-controlled barrel extruder; (iii) feeding the blended magnet-polymer mixture into the barrel extruder at a fixed feed rate of 5-20 kg/hour, wherein the temperature at the outlet is at least to no more than 10° C. above a glass transition temperature of the blended magnet-polymer mixture; (iv) feeding the blended magnet-polymer mixture directly into an extruding die; (v) passing the blended magnet-polymer mixture through the extruding die at a fixed speed; and (vi) cutting the magnet-polymer mixture at regular intervals as the mixture exits the extruding die at the fixed speed. The use of the pellets as feed material in an additive manufacturing process is also described.},
doi = {},
url = {https://www.osti.gov/biblio/1735221}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {9}
}

Works referenced in this record: