DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

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:
; ; ; ; ; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1735221
Patent Number(s):
10766181
Application Number:
15/796,110
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29K - INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29C - SHAPING OR JOINING OF PLASTICS
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. Tue . "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 = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {9}
}

Works referenced in this record:

A novel method combining additive manufacturing and alloy infiltration for NdFeB bonded magnet fabrication
journal, September 2017


Mechanical properties of Nylon bonded Nd–Fe–B permanent magnets
journal, February 2003


Additive manufacturing of near-net-shape bonded magnets: Prospects and challenges
journal, July 2017


Studies on in situ magnetic alignment of bonded anisotropic Nd-Fe-B alloy powders
journal, January 2017


Recent development in bonded NdFeB magnets
journal, February 2002


3D print of polymer bonded rare-earth magnets, and 3D magnetic field scanning with an end-user 3D printer
journal, October 2016


Binder Jetting: A Novel NdFeB Bonded Magnet Fabrication Process
journal, April 2016


Direct-write 3D printing of NdFeB bonded magnets
journal, December 2016


Big Area Additive Manufacturing of High Performance Bonded NdFeB Magnets
journal, October 2016


Rare earth anisotropic magnetic materials for polymer bonded magnets
patent, November 1995