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sand reclaimers

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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
... or no cure. It can also contribute to the acceleration of the cure rate in basic catalyzed systems to a point where the sand is cured before it can be used. The ADV test can also be used to monitor acid buildups in acid-cured reclaimed sands and to check for influxes of basic contaminants into the sand...
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
... is predried at 110 °C (230 °F) to remove any moisture present in the sand system. The LOI testing, similar to the one used for green sands, is usually conducted on incoming or reclaimed sand used for chemically bonded sand systems. Acid demand value (ADV), a test especially for chemically bonded sands...
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
... be reclaimed, screened, and processed for reuse. A general flow chart of sand processing in a foundry is shown in Fig. 2 . The details of shakeout and reclamation depend on the type of casting process and the methods of bonding or holding the mold aggregates together. In lost foam casting, for example...
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
... such as rattail, buckles, and veining ( Ref 4 ). Silica sand is suitable for all types of molding mixtures and is easy to reclaim. Olivine Sand Olivine—(Mg,Fe) 2 ·SiO 4 , named for its olive-green color—is a solid solution of forsterite (Mg 2 SiO 4 ) and fayalite (Fe 2 SiO 4 ). Olivine sand is a naturally...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... be tested for acid demand value, especially when certain resin binders are used for cores. Sand Reclamation Sand is normally reclaimed and reused. When the casting is poured, the sand next to the molten metal is heated above 600 °C (1110 °F), the water evaporates, and the clay at the interface can...
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
... lower expansion than silica. All of these aggregates are generally more expensive than silica, but they reduce expansion, burn-in/burn-on, and dimensional-related casting defects. The sand in a green sand molding system is primarily made up of recycled, reclaimed, and reused sand. Sand for the green...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005256
EISBN: 978-1-62708-187-0
... poured. Sand inclusions and other sand mold-related defects can be virtually eliminated. As with investment and lost foam casting, there are no cores or parting lines, high dimensional accuracy, and excellent surface finish. The ceramic shell does not have to be as thick as for shell casting...
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
... in weather have no effect on coated sand, provided it was thoroughly dry when removed from the muller. Sand Reclamation When economically feasible, shell molding sand may be reclaimed, usually by either the dry-scrubbing or the thermal method. In the dry-scrubbing method, the sand grains are rubbed...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001228
EISBN: 978-1-62708-170-2
... are too large to be placed in blasting machines, portable equipment, such as air blast equipment, can be brought to the workpiece. A low-cost sand usually is used, because it is difficult to reclaim or recirculate the abrasive with portable equipment. Also, it is necessary to prevent random scatter...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001225
EISBN: 978-1-62708-170-2
... polymers and coatings Dissolution of sand, ceramic, and glassy materials Stripping of plasma carbide coatings In addition, molten salt baths may be used to pretreat cast iron surfaces before brazing and bonding operations. Molten salt baths for cleaning applications are chemically active...
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
... in both the internal and external areas of the foam pattern system. Sand System When sand is not reclaimed, the sand most commonly used for economic reasons is silica sand, subangular to round. However, a round synthetic mullite sand can fill a flask containing complex foam patterns 35% faster than...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003471
EISBN: 978-1-62708-195-5
... rapidly at temperatures of 232 to 316 °C (450 to 600 °F). The diamines could be distilled and extracted from the steam and the reclaimed polyols recovered from the hydrolysis residue. Ford explored the hydrolysis of polyurethane flexible foam seat cushion material at a lower temperature than...
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
... of the metals that can be cast and mold materials are given in the article, along with details of versions of the two processes. Both processes use expendable molds, and mold materials are not fully reclaimable; thus, mold costs tend to be high. Still, slurry processes are cost-effective, especially for high...
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
... conveying system and vibrated with a high-frequency compaction system either from the bottom or the side of the flask. Variable frequency and amplitude may be required to compact the sand fully in both the internal and external areas of the foam pattern system. Sand System When sand is not reclaimed...
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
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006313
EISBN: 978-1-62708-179-5
... skin thickness. A high percentage of reclaimed sand (furan and phenolic urethane) increases the thickness of the graphite degradation layer ( Ref 21 ). Laboratory research ( Ref 22 ) found that even less than 0.02% S in a no-bake mold material was enough to induce a 0.05 mm (0.002 in.) layer...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003050
EISBN: 978-1-62708-200-6
... products are finding application in the construction industry and as raw materials for other processes. Ceramic Products Reclaimed ceramic materials are being considered as replacements for natural aggregates for highway construction, as well as for container glass, slags, foundry sands, and other...
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
... Abstract This article focuses on the variety of alloys, furnaces, and associated melting equipment as well as the casting methods available for manufacturing magnesium castings. These methods include sand casting, permanent mold casting, die casting, thixomolding, and direct chill casting...
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
...-pressure molding begins as metalcasters begin to increase the air pressure in air squeeze-molding machines to increase mold hardness (density). Fast-drying core oils are introduced. The pneumatic scrubber is developed to reclaim clay-bonded sands. Several wet reclamation systems also are in operation...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005294
EISBN: 978-1-62708-187-0
... Abstract This article reviews the production stages of iron foundry casting, with particular emphasis on the melting practices, molten metal treatment, and feeding of molten metal into sand molds. It discusses the molten metal treatments for high-silicon gray, high-nickel ductile, and malleable...