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vacuum riserless
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Published: 01 December 2008
Fig. 12 Example of vacuum riserless/pressure riserless cast automotive chassis and suspension components
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Published: 01 December 2008
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Published: 01 December 2008
Fig. 14 Vacuum riserless/pressure riserless production casting machine. Courtesy of CMI Equipment and Engineering, Inc., AuGres, MI
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Published: 30 November 2018
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Published: 30 November 2018
Fig. 16 Vacuum riserless/pressure riserless production casting machine. Courtesy of CMI Equipment and Engineering, Inc., AuGres, Mich.
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Image
Published: 30 November 2018
Fig. 17 Example of vacuum riserless/pressure riserless cast automotive chassis and suspension components
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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
... Abstract This article provides an overview of conventional low-pressure casting and describes types of furnaces, tooling, and cores. It discusses the casting cycle steps, advantages, mechanical properties, and considerations of counterpressure casting. The article describes the vacuum riserless...
Abstract
This article provides an overview of conventional low-pressure casting and describes types of furnaces, tooling, and cores. It discusses the casting cycle steps, advantages, mechanical properties, and considerations of counterpressure casting. The article describes the vacuum riserless/pressure riserless casting process for casting aluminum.
Image
Published: 15 June 2019
Fig. 30 Fatigue crack growth rate ( R = 0.1) vs. stress-intensity factor at room temperature for A356.0-T6 aluminum alloy castings produced by various processes. VRC/PRC, vacuum riserless casting/pressure riserless casting
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Image
Published: 15 June 2019
Fig. 31 Fatigue crack growth rate ( R = 0.5) vs. stress-intensity factor at room temperature for A356.0-T6 aluminum alloy castings produced by various processes. VRC/PRC, vacuum riserless casting/pressure riserless casting
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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
... 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 casting Aluminum 3 Yes Medium...
Abstract
This article discusses the categories and subcategories of shape casting processes. These include single-use processes such as sand, plaster, ceramic, and graphite molding; essentially unpressurized multiuse processes, such as permanent mold; and high-pressure metal mold methods, such as die casting, squeeze casting, and semisolid processing. The article contains tables that compare some of the typical capabilities of shape casting processes.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005276
EISBN: 978-1-62708-187-0
... strength of rotating components. Vacuum can also increase the operating window for the parameters of the die casting machine. Vacuum Riserless Casting (VCR) Vacuum riserless casting (VCR) is a variation of low-pressure die casting that uses vacuum alone to draw metal into the die. The VCR process...
Abstract
Vacuum high-pressure die casting uses a vacuum pump to evacuate the air and gases from the die casting die cavity and metal delivery system before and during the injection of molten metal. This article describes the conventional die casting, vacuum die casting, and high-pressure die casting processes.
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
... Riserless Casting (VRC) The use of vacuum rather than pressure to introduce molten metal into steel dies has significant advantages over low pressure casting. The molten metal bath is open and accessible. Molten metal level can be maintained within a narrow range in close proximity to the mold entry...
Abstract
Aluminum casting in steel and iron permanent molds is used widely throughout industry, and the vast majority of permanent mold castings are made of aluminum and its alloys. There are several methods used to cast aluminum in permanent molds. This article focuses on permanent 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. The article reviews the basic components of mold coatings: refractory fillers, binder, and carrier. Casting defects and suggested corrective actions for permanent mold casting are summarized in a table. The article concludes with a discussion on thin-wall permanent-mold castings.
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006568
EISBN: 978-1-62708-210-5
... castings. USCAR, United States Consortium for Automotive Research; PM, permanent mold; VRC, vacuum riserless casting; PRC, pressure riserless casting. Source: Ref 7 Like alloy 357.0, small adjustments to the magnesium content and/or the heat treatment of alloys 356.0 and A356.0 can produce a wide...
Abstract
This datasheet provides information on key alloy metallurgy, processing effects on physical and mechanical properties, and applications characteristics of Al-Si-Mg high-strength casting alloys 356.0 and A356.0. Figures illustrate the variation of Charpy impact energy in A356-T6 castings as a function of solution time; and room-temperature aging characteristics for aluminum alloy 356.0-T4. Growth and hardness curves for aluminum alloy 356.0-T4 are also presented.
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
... sand, chemically bonded sand, plaster mold, and investment casting. Important variations include molding and pattern distinctions such as lost foam (evaporative pattern), shell and V-mold, and process derivatives such as squeeze casting, low-pressure permanent mold, vacuum riserless casting...
Abstract
Aluminum casting alloys are the most versatile of all common foundry alloys and generally have the highest castability ratings. This article provides an overview of the common methods of aluminum shape casting. These include gravity casting, die casting, sand casting, lost foam casting, shell mold casting, plaster casting, investment casting, permanent mold casting, squeeze casting, semisolid forming, centrifugal casting, and pressure die casting. The article presents several different factors on which the selection of a casting process depends. It discusses gating and risering principles in casting. The article concludes with information on premium engineered castings that provide higher levels of quality and reliability than in conventionally produced castings.
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006548
EISBN: 978-1-62708-210-5
... to air being entrapped in the molten metal shot. However, shot control, venting, and vacuum die casting have reduced porosity and allowed production of high-integrity die castings (see also the article “Die Casting of Aluminum Alloys” in Aluminum Science and Technology , Volume 2A of ASM Handbook...
Abstract
This article aims to comprehensively review and summarize the material properties and engineering data for aluminum alloy castings and their many applications. The discussion focuses on conventional sand, permanent mold, and die castings as well as the premium engineered versions of some alloys. The article provides a summary of aluminum casting alloy designations of The Aluminum Association, the Unified Numbering System, and specific alloys considered premium strength by definition and by ASTM International and Aerospace Material Specifications. A distillation of data from published industry sources is given for a wide range of the properties and performance characteristics for topics such as: physical and thermophysical properties, typical and minimum mechanical properties, fatigue resistance, fracture resistance, and subcritical crack growth.
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
... include molding and pattern distinctions such as lost foam (evaporative pattern), shell and V-mold, and process derivatives such as squeeze casting, low-pressure permanent mold, vacuum riserless casting, and semisolid forming based on rheocasting/thixocasting principles. Of these casting methods, high...
Abstract
Aluminum casting alloys are among the most versatile of all common foundry alloys and generally have high castability ratings. This article provides an overview of the common methods of aluminum shape casting. It discusses the designations of aluminum casting alloys categorized by the Aluminum Association designation system. The article summarizes the basic composition groupings of aluminum casting alloy and discusses the effects of specific alloying elements and impurities. The characteristics of the important casting processes are summarized and compared in a table. The article presents the advantages and disadvantages of green sand casting, permanent mold casting, semipermanent mold casting, and high-pressure die casting. A discussion on other casting processes, such as investment casting, lost foam, plaster mold casting, pressure casting, centrifugal casting, and semisolid casting, is also included.
Book Chapter
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
...) Standard LPPM Light metals 3 Yes Medium … Vacuum riserless casting/pressure riserless casting Aluminum 3 Yes Medium … Counterpressure casting/pressure-counterpressure casting Aluminum 3 Yes Medium … Countergravity casting All 3 … Small … High-pressure die casting...
Abstract
This article provides a general introduction on casting processes and design techniques. It discusses the process steps and methods of the main categories of shape casting methods, namely, expendable molds with permanent patterns, expendable molds with expendable patterns, and metal or permanent mold processes. The article lists the general guidelines of geometry in casting design. It describes the three separate contractions that are a result of cooling: liquid-liquid contraction, solid-solid contraction, and liquid-solid contraction. Factors influencing the solidification sequence of simple shapes, such as T-sections, X-sections, and L-sections, are discussed. The article also presents an overview of geometric factors that influence heat transfer and transport phenomena. It concludes with a description of the structure and properties of castings.