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green sand operations

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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005242
EISBN: 978-1-62708-187-0
...Abstract Abstract This article reviews the basic types of mold aggregates and bonding methods for expendable molds and coremaking. It provides an overview of mold media and the basic types of sands and their properties. The most significant clays used in green sand operations...
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
...” in this article). Included in the control program for a green sand system should be routine monitoring of the dust collection system. Particular attention should be given to the screen distribution, methylene clay content test, and the total combustible level test. Deviations from normal operating levels...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006329
EISBN: 978-1-62708-179-5
..., must be as high as possible. If the dimensional accuracy and surface finish requirements of the casting exceed the limits of the green sand molding process, other processes can be used, such as shell molding, chemical bond molding, and permanent molding. Each process creates a rigid mold surface...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006297
EISBN: 978-1-62708-179-5
.... (a) Angular. (b) Round. (c) Compound. (d) Subangular. Reprinted with permission from American Foundry Society. Source: Ref 3 Fig. 4 Allotropic transitions of quartz Fig. 7 Green compression strength of green sand bonded with (a) Southern bentonite, (b) Western bentonite, and (c...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005259
EISBN: 978-1-62708-187-0
...Abstract Abstract Vertical centrifugal casting machines, installed below the ground level for maximum operator safety, are used for producing bushings and castings that are relatively large in diameter and short in length. This article discusses the mold design for different types of sand molds...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... Melting and Casting Postcasting Operations Permanent Molding Die Casting Semisolid Casting Centrifugal Casting Green Sand Molds Dry Sand Molds Resin-Bonded Sand Molds Sodium Silicate Bonded Sand (The CO<sub>2</sub> Process) Mold Washes and Coatings Sand Reclamation...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006533
EISBN: 978-1-62708-207-5
... in. Green sand 0.1–0.5 0.2–0.9 0.05–0.5 0.002–0.02 175 Dry sand 0.05–0.2 0.1–0.35 0.1–1.0 0.004–0.04 … Permanent mold 0.3–1.0 0.5–2.0 0.03–0.07 0.001–0.003 47 Die casting 0.5–2.0 0.9–3.6 0.03–0.07 0.001–0.003 &lt;10 Source: Ref 2 Capabilities of casting processes...
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
... molding plastic film SAND MOLDING PROCESSES are classified according to the way in which the sand is held (bonded). Most sand casting employs green sand molds, which are made of sand, clay, and additives. Binders are also used to strengthen the cores, which are the most fragile part of a mold...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005354
EISBN: 978-1-62708-187-0
... be required with the high pressures of high-density green sand molding). Likewise, when very large castings require the use of floor molding, this can be done by nobake as a manual operation with pneumatic tools. In contrast, floor molds of green sand require slingers to achieve adequate compaction (see...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005252
EISBN: 978-1-62708-187-0
... between shell molding and green sand molding. casting dimensional accuracy green sand molding shell molding tensile strength mold cracking soft molds peelback mold shift shell coremaking sand reclamation resin-sand properties mold defects mold patterns THE SHELL PROCESS was first...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005334
EISBN: 978-1-62708-187-0
... and disadvantages of green sand molding and tabulates typical compositions and properties of magnesium molding sands. The article provides information on the machining characteristics of magnesium and the applications of magnesium alloys. References References 1. Unsworth W. , “Application Guide...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009019
EISBN: 978-1-62708-187-0
... Limitations Green Sand versus Dry Sand Cores Core Fragility Thin Core Sections Thin-Wall Casting Sections Formed by Cores General Principles Designing for the Use of Sand Cores Support for Sand Cores Coring of Tortuous Passages Cores in Permanent Mold Castings Investment Castings...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005254
EISBN: 978-1-62708-187-0
... Fig. 3 Processing of completed (cooled) casting. (a) Flask is tipped, and the sand is recycled. (b) Casting is ready for degating and cleaning Abstract Abstract This article discusses the sequence of operations for producing a foam pattern for casting. It provides information on expandable...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.9781627082075
EISBN: 978-1-62708-207-5
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005244
EISBN: 978-1-62708-187-0
.... There, the mixture is agitated by a revolving mixer or by vibratory motion for 20 s to 5 min. Prepared sand is then discharged and transferred to the coremaking station. A continuous mixer is almost a necessity for a no-bake coremaking operation but is also adequate for mixing sand for the cold- or heat...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006508
EISBN: 978-1-62708-207-5
... using an EPS foam pattern embedded in traditional green sand, which was not removed before pouring of the metal (patent 2,830,343). The polystyrene foam pattern left in the sand mold is decomposed by the molten metal. The metal replaces the foam pattern, exactly duplicating all of the features...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005249
EISBN: 978-1-62708-187-0
.... Figure 1 shows that the freezing time for a test casting made in a conventional plaster mold is more than four times as long as that for one made in a hard-rammed green sand mold. Following assembly, the mold is ready for preheating. Some foundries preheat all conventional plaster molds to a pre...
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
... Table 7 General characteristics of casting processes See Fig. 1 for shape descriptions Characteristic Casting process Green sand Resin-bonded sand Plaster Lost foam Investment Permanent mold Die Part Material (casting) All All Zn to Cu Al to cast iron All Zn to cast...
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
...-silicon (300 series) Gravity die 25 1 152 6 0.64 0.025 1.3 0.05 0.25 0.01 0.38 0.015 15.6 0.015625 Aluminum-silicon (300 series) Green sand 25 1 152 6 0.38 0.015 0.5 0.02 0.51 0.02 0.792 0.0312 25 0.025 Aluminum-magnesium (500 series) Green sand 25 1 152 6 0.38...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005355
EISBN: 978-1-62708-187-0
... inspection shakeout vertical core knockout machine A-frame core knockout machine pressure testing automating gate removal After solidification and cooling, further processing and finishing of the castings is required. The required operations and levels of finishing depend on the process (green sand...