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expendable mold

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140021
EISBN: 978-1-62708-335-5
...: expendable mold gravity-feed casting, nonexpendable (permanent) mold gravity feed casting, and pressure die casting. Next, the chapter describes the technologies used to produce premium engineered castings and when such castings may be relevant. The chapter concludes with descriptions of other process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200173
EISBN: 978-1-62708-354-6
... Abstract This chapter discusses the following conventional molding processes for static casting: green sand molding, dry sand molding, vacuum molding, and expendable pattern casting. It also discusses core and mold processes for steel castings. The chapter provides an overview of sand molds...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060085
EISBN: 978-1-62708-261-7
.... In the majority of melting operations, after the liquid metal is produced it is cast into molds. At this point it becomes either an ingot or a casting upon solidification. Use of the term ingot is reserved for the furnace output in molded form that is intended for shaping into a marketable material through...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410021
EISBN: 978-1-62708-280-8
... use. They have been broadly classified into two groups: Sand molds Metal molds Fig. 3.1 Range of aluminum casting processes using sand and metal molds Sand molds use expendable molds, with sand as the molding medium. Metal molds use permanent molds that are reused in each...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.tb.atia.t59340083
EISBN: 978-1-62708-427-7
... of cast products is also included. aluminum-silicon casting alloys expendable mold grain refinement inclusions melt treatment porosity reusable mold shape casting shape-casting applications solidification Examples of (a) aluminum cast components by sand-mold casting. Courtesy...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740047
EISBN: 978-1-62708-308-9
.... Foundry processes can be classified based on the molding medium, such as sand molds, ceramic molds, and metallic molds. Molding methods may also be classified based on whether the molds are permanent or expendable. Similarly, subclassifications can be developed from patterns, (i.e., whether...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.9781627083355
EISBN: 978-1-62708-335-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200001
EISBN: 978-1-62708-354-6
... machining can be eliminated. Expendable Pattern Casting Expendable pattern casting is also called Lost Foam or Full Mold process and uses a pattern of polystyrene which can be cut from stock or formed in a metal die, depending on volume requirements. The patterns are coated with a ceramic wash...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370177
EISBN: 978-1-62708-447-5
... a long lifespan of nearly 100,000 pours. This process is known as the gravity permanent mold process, although the molds do have a finite life. When expendable sand cores are used for each pour in a metal mold, the process is known as the semipermanent mold process (SPM). The industries served...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200437
EISBN: 978-1-62708-354-6
... The process of melting out the expendable wax pattern from an investment mold by the application of heat, usually at temperatures less than 250 °F (121 °C). Dextrin . . . Soluble gummy carbohydrate formed by the decomposition of starch by heat, acids, or enzymes; it is used in core compounds, mold compounds...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410151
EISBN: 978-1-62708-280-8
.... Manufacturing cells can be engineered for low- as well as high-volume production. Capital costs are the lowest among all of the high-integrity processes. Complex castings can be produced using expendable sand cores. When sand cores are used, the process is called semi-permanent mold process (SPM...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730115
EISBN: 978-1-62708-283-9
... with continuous fibers. Examples are extrusions, injection moldings, and transfer moldings. The disadvantage of chopped fibers is that some of the reinforcing effect of the fibers is sacrificed because the average axial stress carried by fibers is less for short ones than long ones. The average axial stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.9781627082808
EISBN: 978-1-62708-280-8
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280079
EISBN: 978-1-62708-267-9
... patterns, molds, and shells are produced, discusses the practice of directional solidification, and examines an assortment of turbine components cast from nickel- and cobalt-base alloys. The chapter also addresses casting problems such as inclusions, porosity, distortion, core shift, and leaching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410029
EISBN: 978-1-62708-280-8
... will accelerate the temperature gradient in the direction of the feeding. The gradient across the cross section should be at a minimum to prevent choking of the feed path. 4.6.6 Semipermanent Molding The semipermanent molding (SPM) process increases the versatility of GPM using expendable sand cores...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370187
EISBN: 978-1-62708-447-5
... molding process. The low-pressure semipermanent molding process uses steel molds with expendable sand cores, like the gravity semipermanent molding process. The process applications range from decorative automotive wheels to critical safety components for automotive chassis (substructure) and complex...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.9781627084475
EISBN: 978-1-62708-447-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.sch6.9781627083546
EISBN: 978-1-62708-354-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
... amounts of high-performance composites. Composites are also used extensively in both weight-critical reusable and expendable launch vehicles and satellite structures ( Fig. 8.7 ). Weight savings due to the use of composite materials in aerospace applications generally ranges from 15 to 25%. Fig. 8.6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780003
EISBN: 978-1-62708-281-5
... be characterized by molecular weight. For example, elongation at break for acrylic samples with different molecular weights can be reduced to a single curve when weight-average molecular weight is used. Plastics with narrow molecular weights are preferred for low warpage in thin-wall injection molding, film...