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indirect extrusion

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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004006
EISBN: 978-1-62708-185-6
... or indirect extrusion. The article illustrates the significance of extrusion speeds and temperatures in hot extrusion. It describes the basic types of presses used in the hot extrusion of metals. The article provides information on the characterization of extruded shapes and explains the operating parameters...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004015
EISBN: 978-1-62708-185-6
... performance. The article discusses different aluminum extrusion processes, such as the direct extrusion process and the indirect extrusion process. It schematically illustrates the plotting of flow stress and extrudability for several types of aluminum alloys. The article concludes with information...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006534
EISBN: 978-1-62708-207-5
... a workpiece during extrusion is pushed through a die (direct extrusion) or a die is pushed over a stationary workpiece (indirect extrusion). There also are obvious differences in hardware and process layout and some basic process differences. The metal is generally subjected to much greater compression...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006085
EISBN: 978-1-62708-175-7
...; these are recommended texts that provide an excellent background for understanding the process. There are two main types of extrusion mechanisms: direct and indirect, or inverted ( Fig. 1 ). In direct extrusion, the ram pushes a workpiece forward through a die, causing a reduction in cross-sectional area...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006385
EISBN: 978-1-62708-192-4
... and is extremely popular for extruding aluminum. It has the advantage of allowing inexpensive die production (through wire electrical discharge machining [EDM] or other approach) and competes well with casting, forging, machining, and so forth. Indirect, Reverse, Inverted, or Backward Extrusion In indirect...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006556
EISBN: 978-1-62708-290-7
... Maker. (b) Green casting pattern (left), semifinished casting (right), and finished item (center). Source: Ref 3. Courtesy of J. McMahon/3D Inkjet Museum Abstract Abstract The additive manufacturing technologies in the casting of precious metals are divided into two groups: indirect metal...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006485
EISBN: 978-1-62708-207-5
... container dimensions, which typically range from 15 to 28 cm (6 to 11 in.) in diameter. Billets with as-cast surfaces are acceptable in the direct extrusion process but must be scalped for indirect extrusion. Molten metal must be composition controlled and processed before ingots are cast. Alloying...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005286
EISBN: 978-1-62708-187-0
... be scalped for indirect extrusion. Fig. 2 Vertical direct chill billet casting machine. Courtesy of Light Metal Age , Dec 1998 Ingots for Rolling Terminologies differ but ingots cast to provide starting stock for sheet, plate, and foil are called sheet ingots or rolling ingots...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004024
EISBN: 978-1-62708-185-6
...Abstract Abstract This article describes two rapid tooling technologies, namely, direct rapid tooling and indirect rapid tooling, for forging-die applications. Commonly used direct rapid tooling technologies include selective laser sintering, three-dimensional printing, and laser-engineered net...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003790
EISBN: 978-1-62708-177-1
... of IdraPrince Inc. Aluminum Indirect Semisolid Metalworking Component Microstructures When examining microstructures, the feedstock should be kept in mind; continuously cast bar stock and grain-refined extrusion billets will produce very different microstructures in the final component ( Ref 12...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006518
EISBN: 978-1-62708-207-5
...) or indirect (reverse) extrusion process ( Fig. 7 ). In direct extrusion, a billet is pushed through a die. Frictional forces are high due to the large surface area at the billet/container interface during direct extrusion. A high extrusion force is required to initiate the process due to the friction...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003258
EISBN: 978-1-62708-176-4
...Abstract Abstract An important activity in metalworking facilities is the testing of raw materials for characteristics that ensure the integrity and quality of the products made. This article reviews the common material parameters that can have a direct or indirect influence on workability...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005667
EISBN: 978-1-62708-198-6
... a supply chain concern for many device manufacturers. Manufacturing Process Processing of polymers during polymerization and downstream processes such as extrusion and injection molding can expose the material to conditions such as shear and temperature. Depending on the tolerance and process window...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006080
EISBN: 978-1-62708-175-7
... connecting rods, transmission parts, and hand tool components. Hot pressing is used primarily for specialty materials such as tungsten carbide, beryllium, and ceramics. Hot pressing is also used as a consolidation process to produce billets for further processing by conventional forging or extrusion...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... or reverse extrusion. Lack of flash at the parting line decreases stress-corrosion cracking in forging alloys susceptible to this type of failure. Multidirectional hot working, characteristic of this process, decreases adverse directional effects on mechanical properties. Die Design and Materials...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.9781627081856
EISBN: 978-1-62708-185-6
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
..., stiffness, and dynamic response of equipment. The article reviews the determination of friction coefficient using laboratory monitoring methods, indirect measurements, and the inverse method. It considers the determination of the interface heat-transfer coefficient by using the ring test and computer...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006569
EISBN: 978-1-62708-290-7
... into each layer to create a loosely bound powder preform ( Fig. 2a ). Although the printing step seems simple, there are many motions involved in preparing the print layer and managing the inkjet system during printing. Compared with extrusion AM, which requires only a gantry and nozzle, binder-jetting...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0009216
EISBN: 978-1-62708-176-4
... values should be based on that producer's data that yield the lowest A and B values. Direct and Indirect Computation The only room-temperature design allowables that are regularly determined by direct computation are F tu and F ty . This procedure usually is limited to a specified...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002479
EISBN: 978-1-62708-194-8
... and indirect cost as well as quality of assemblies are determined by the number of parts; the ease with which the parts and components are handled, assembled, procured, and inspected; and the functionality, serviceability, maintainability, reliability, and durability achieved by the finished device or product...