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low-pressure permanent mold casting

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Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006513
EISBN: 978-1-62708-207-5
... mold casting with molten aluminum fed by gravity, low pressure, vacuum and centrifugal pressure, and squeeze casting. It discusses the major variables that affect the life of permanent molds, including pouring temperature, casting shape, cooling methods, heating cycles, storage, and cleaning...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005332
EISBN: 978-1-62708-187-0
... can be cast by many processes, including sand casting, permanent mold casting, precision casting, high-pressure die casting, and low-pressure die casting. The article provides information on the types of copper castings and tabulates the nominal chemical composition and mechanical properties...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005261
EISBN: 978-1-62708-187-0
... widely practiced, is a variation of permanent mold casting ( Ref 2 ) (although it is used to a limited degree to fill sand or plaster molds, too); thus, it is frequently called low-pressure permanent mold. It may also be referred to as low-pressure die casting, perhaps deriving from the European practice...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006524
EISBN: 978-1-62708-207-5
... processes Criteria Process Green sand Bonded sand Lost foam Core package Investment casting Semipermanent mold Permanent mold (a) Low-pressure permanent mold High-pressure die casting Vacuum high-pressure die casting Squeeze casting Semisolid casting Maximum weight standard part...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005224
EISBN: 978-1-62708-187-0
... complex dimensional details (e.g., thin-walled sections), as in high-pressure die casting, but also produces high-integrity castings currently attainable only with squeeze or low-pressure permanent mold casting. Semisolid metal processing offers several distinct advantages over conventional near-net shape...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005186
EISBN: 978-1-62708-187-0
... century 1900s 1900—Brinnell hardness test machines introduced. Aluminum-bronze in regular production in the United States. Early 1900s—First patent for low-pressure permanent mold casting process issued to England's E.H. Lake. 1901—American Steel Foundries (St. Louis) produces the first...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006525
EISBN: 978-1-62708-207-5
... (AA 365) with modification from strontium. Courtesy of Aluminium Rheinfelden GmbH Fig. 19 Composition ranges for verious structural aluminum die casting alloys, compared to iron solubility limit. Source: Ref 16 Fig. 20 According to Fe(max) = 0.80 – Mn(max), high Mn requires low...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005287
EISBN: 978-1-62708-187-0
... extensive chilling was used, but it was always a factor in permanent mold. For this reason, and to overcome other low-pressure process limitations, vacuum riserless casting (VRC) was developed in the early 1960s. Rather than pressurize a contained molten reservoir, the application of a vacuum on the mold...
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
...  Gravity   Static top pour Nonferrous and metal-matrix composites (MMCs) 3 Yes Medium to large …   Tilt pour Nonferrous 3 Yes Medium to large …  Low-pressure permanent mold (LPPM)   Standard LPPM Light metals 3 Yes Medium …   Vacuum riserless casting/pressure   riserless...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006580
EISBN: 978-1-62708-210-5
... pressure tightness and resistance to hot cracking. Solidification shrinkage tendencies are very low. Alloy B443.0 can be cast into thin and intricate sections with ease. It is especially suited for pressure-tight, leak-proof castings. Castings in sand or chill mold exhibit virtually complete freedom from...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... Plaster bond Counter-gravity low-pressure casting Permanent mold processes Die casting High-pressure die casting Low-pressure die casting Gravity die casting (permanent mold) (a) Centrifugal casting Vertical centrifugal casting Horizontal centrifugal casting Hybrid...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009015
EISBN: 978-1-62708-187-0
.... Permanent Mold Casting Permanent mold processes involve the production of castings by pouring molten metal into permanent metal molds using gravity, low pressure, vacuum or centrifugal pressure. Simple reusable cores are usually made of metal. More complex cores are made of sand, plaster, ceramics...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003127
EISBN: 978-1-62708-199-3
... or low-pressure introduction of molten metal. Most permanent mold castings weigh less than 10 kg (20 lb), but castings weighing up to 25 kg (50 lb), and sometimes even up to 100 kg (200 lb), are not uncommon. Permanent mold castings have smoother surfaces than those of sand castings and exhibit superior...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003175
EISBN: 978-1-62708-199-3
... sand, composite mold, plaster mold, investment casting, permanent mold, counter-gravity low-pressure casting, and pressure die casting. With time at temperature, adsorption of hydrogen results in increased dissolved hydrogen in the melt. With time at temperature, oxidation of the melt occurs...
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
... the aluminum, magnesium, zinc, and copper alloys and hypereutectic gray iron. THE PERMANENT MOLD CASTING PROCESS involves the production of castings by pouring molten metal into permanent metal molds using gravity, low pressure, vacuum, or centrifugal pressure. Simple reusable cores are usually made...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001061
EISBN: 978-1-62708-162-7
....) 1.5 μm (50 μin.); best finish of the three casting processes Gas porosity Lowest porosity possible with good technique Best pressure tightness; low porosity possible with good technique Porosity may be present Cooling rate 0.1–0.5 °C/s (0.2–0.9 °F/s) 0.3–1.0 °C/s (0.5–1.8 °F/s) 50–500 °C/s...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006553
EISBN: 978-1-62708-210-5
.... Alloy C355.0 with low iron is a higher-strength version of 355.0. When premium-strength casting processes are used, even higher tensile properties can be obtained with heat treated alloy 354.0. Alloys of this type are routinely cast in sand and permanent mold. Applications include: Engine...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006590
EISBN: 978-1-62708-210-5
... and quantity of dirt particles; operating conditions; viscosity, stability, pressure, and cooling properties of the lubricant; and finish of adjacent parts. Aluminum bearings are plated for applications involving heavy loads at low speeds or to assist all types of bearings during run–in periods. Typical...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009021
EISBN: 978-1-62708-187-0
... and kept rejections at an acceptable low level. Fig. 26 Providing clear channels for metal flow in the mold simplified production of this casting and permitted gating at one end only. Investment mold cast; 8630 steel Fig. 6 This close-tolerance sand casting, although designed to be cast...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005423
EISBN: 978-1-62708-196-2
.... The rate of interface heat transfer in this gap-forming scenario is usually much lower than the initial rate due to the typically low values of thermal conductivity exhibited by gases, the increased thickness of the interface region, the decreasing temperature of the casting surface (which greatly reduces...