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magnetic molding

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Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005251
EISBN: 978-1-62708-187-0
... (produced in similar fashion) is placed over the drag portion of the mold to form a cope-and-drag assembly with a plastic-lined cavity ready to be filled with molten metal. Courtesy of Harmony Castings Fig. 1 Magnetic molding process. Source: Ref 3 Abstract This article describes...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006020
EISBN: 978-1-62708-175-7
... of Metal Injection Molding , Heaney D. , Ed., Woodhead Publishing , London , 2012 , p 197 – 234 • Miura H. and Kange H. , Application of Metal Injection Moulding to Soft Magnetic Materials , Powder Metall. , 2013 , Vol 56 , p 38 – 45 • Piotter V. , Hanemann...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006055
EISBN: 978-1-62708-175-7
... Table 1 Secondary operations commonly performed on metal injection molding components Operation Purpose Machining/grinding Bring tolerances into specification or create new features Coining/sizing Move part material to print specification (e.g., opening a slot that has closed...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005243
EISBN: 978-1-62708-187-0
... Abstract Green sand molding and chemically bonded sand molding are considered to be the most basic and widely used mold-making processes. This article describes the sand system formulation, preparation, mulling, mold fabrication, and handling of green sand molds. It lists the advantages...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006021
EISBN: 978-1-62708-175-7
... Table 1 Most important techniques used to make mold inserts Process Minimum dimensions, µm Roughness (R a ), nm Common materials X-ray lithography (PMMA resist) + electroplating (LIGA) (a) 0.2 10–50 Nickel, nickel alloys UV (SU-8) lithography + electroplating >2 ≥20...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... Phenolic urethane Polyol urethane Silicate and phosphate bonds Sodium silicate/CO 2 Shaw process (ceramic molding) Unicast process (ceramic molding) Alumina phosphate Plaster bonds Gypsum bond No bond Magnetic molding Vacuum molding Expendable mold...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006141
EISBN: 978-1-62708-175-7
... becomes the end-use component (for example bonded Fe-Nd-B based permanent magnets), similar to a plastic injection molded part. In general, MIM mostly follows the plastic injection molding process up to the point of producing the as-molded green part. The exception is that the MIM green part...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003014
EISBN: 978-1-62708-200-6
... moisture degradation. A magnet is placed in the hopper throat to remove any iron that has accidentally entered the feedstock. Fig. 1 The injection end of a reciprocating-screw injection molding machine. Source: Ref 2 In the heated extruder barrel, which contains the reciprocating screw...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006057
EISBN: 978-1-62708-175-7
... possible in metal injection molding parts. The article also discusses ferromagnetic cores used in alternating current applications and some permanent magnets, such as rare earth-cobalt magnets and neodymium-iron-boron (neo) magnets. ferritic stainless steel ferromagnetic cores hysteresis loss...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006468
EISBN: 978-1-62708-190-0
... Abstract Magnetic-particle inspection is a method of locating surface and subsurface discontinuities in ferromagnetic materials. This article discusses the applications and advantages and limitations of magnetic-particle inspection. It describes magnetic fields in terms of magnetized ring...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003788
EISBN: 978-1-62708-177-1
... magnetic materials began in 1931 with the OP magnets, a mixture of Fe 3 O 4 and cobalt oxide. This was followed by a “Heusler” alloy containing manganese and bismuth. For manganese-bismuth alloys, the magnetic phase is Mn 3 Bi 2 . The powder is mixed with a small amount of resin and molded under pressure...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005241
EISBN: 978-1-62708-187-0
...; shell molding of sand with a thin resin-bonded shell; no-bond vacuum molding of sand; plaster-mold casting; ceramic-mold casting; rammed graphite molding; and magnetic (no-bond) molding of ferrous shot. The article tabulates a general comparison of casting methods and discusses the basic requirements...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001094
EISBN: 978-1-62708-162-7
... it with an appropriate proportion of a polymer and pressing, injection molding, or extruding to final shape. Magnetic properties generally are inferior to sintered magnets but dimensional tolerances can be held close and processing costs kept low. Ceramic permanent magnet materials have high electrical resistivities...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003153
EISBN: 978-1-62708-199-3
... clutches, and other noncritically designed flux carriers. For applications in which complicated magnetic parts would otherwise require considerable machining, it can be helpful to press iron powder in a mold and sinter the part in vacuum or in a reducing atmosphere. Depending on the powder metallurgy...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001093
EISBN: 978-1-62708-162-7
..., these materials may require protection by painting, plating, potting, or molding. The tonnage of magnetically soft materials such as nickel-iron or cobalt-iron alloy used for specialized applications is small compared to the volume of materials used for fractional horsepower motors, heavy rotating...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005260
EISBN: 978-1-62708-187-0
... when possible (on flat surfaces, for example). Coating thickness on hot molds can be measured by commercially available magnetic or ultrasonic measuring devices. Some of these devices may have limited use in high-temperature applications; however, adapting them to permanent mold coating may still...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005187
EISBN: 978-1-62708-187-0
...  Rammed graphite Reactive 1 Yes Unlimited …  Nonbonded sand processes   Vacuum molding Aluminum 1 NA Unlimited …   Magnetic molding Ferrous 1 NA Unlimited … Expendable mold with expendable patterns  Lost foam Aluminum 3 NA Medium to large …  Investment All 2...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003267
EISBN: 978-1-62708-176-4
... that require the use of materials at very low temperatures. The term cryogenic typically refers to temperatures below 150 K. Service conditions in superconducting magnets that use liquid helium for cooling are in the 1.8 to 10 K range. The mechanical properties of materials are usually temperature dependent...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006019
EISBN: 978-1-62708-175-7
... the test method standards, materials standards, and material designation codes for PM materials. It provides information on the codes for structural parts, PM soft magnetic materials, PM self-lubricating bearings, metal injection molded materials, and powder forged materials. References 1. Form...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006324
EISBN: 978-1-62708-179-5
... Penetration in Sand Molds—Part II: Experimental Evaluation of Some of the Main Parameters Responsible for Penetration , AFS Trans. , Vol 104 , 1996 , p 1249 – 1257 24. Stefanescu D.M. , Giese S.R. , Piwonka T.S. , and Lane A. , Cast Iron Penetration in Sand Molds—Part I...