1-20 of 58 Search Results for

molding flasks

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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
... and disadvantages of green sand molding. The article discusses the primary control parameters for the sand system formulation. It describes two basic types of green sand molds: flask molds and flaskless molds. The article provides a discussion on molding problems, including springback and expansion defects...
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
... the thin ceramic shell and to prevent breakage. This allows the use of shells thinner than those employed for investment casting. Pouring The completed ceramic shells are transported to the foundry, where several shells are placed into a molding flask. The flask incorporates a plenum chamber through...
Image
Published: 01 December 2008
Fig. 1 Basic steps of sand molding in a flask with permanent pattern More
Image
Published: 01 December 2008
is released from the flask (step 7 in Fig. 3 ), the sand-filled flask is kept under vacuum and placed on the pouring line, as shown here for the drag portion of the mold. (h) The cope portion (produced in similar fashion) is placed over the drag portion of the mold to form a cope-and-drag assembly More
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
... development as the lost-foam method. The magnetic molding process ( Fig. 1 , Ref 3 ) involves a coated EPS pattern that is surrounded by a mold material of magnetic iron or steel shot (instead of sand as in lost foam). After the EPS pattern is positioned in the flask and encased with magnetic shot...
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
... of rotation is only 5 rpm. This ensures the proper distribution of hot and cold metal in the mold for the optimal feeding action. Green Sand Molds Centrifugal castings can be made in green sand or dry sand molds. When green sand molds are used, flasks (preferably round) are required. Three methods can...
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
... the cleaning of aluminum castings. Advantages of Lost Foam Casting The benefits of lost foam processing are numerous, and most are obvious to those who have witnessed the simplicity of the process. In lost foam casting, there is no mold parting line, and there are no cores. One-piece flasks are readily...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009018
EISBN: 978-1-62708-187-0
... necessary to produce the outside shape. (See text for discussion.) The pattern for this casting, as originally designed, is shown in Fig. 15(a) . The pattern is made in five sections and requires a special four-part flask. Although the end sections of the flask (for mold sections 1 and 4) may...
Image
Published: 01 December 1998
Fig. 2 Essential components of a high-pressure jolt-squeeze molding machine. The compensating head equalizes the pressure applied to each floating peen block as the sand filled flask is hydraulically raised against the peen blocks. This develops a uniformly dense packing of molding sand More
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
... on it. Set time varies somewhat, depending on the slurry composition, but 30 min is usually the maximum set time. After the slurry has set, the pattern and flask are removed, and the drying cycle is started as soon as is practical. Drying the Molds All conventional plaster molds must be dried enough...
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
... (0.180 in.) can be produced. Special molding techniques can sometimes be used to produce sections down to 3 mm (0.120 in.). Flask size limits the maximum-sized casting. The flask must be large enough to permit enough sand to support the pattern during pouring. In addition, the weight of the flask...
Image
Published: 01 December 2008
Fig. 5 High-speed automatic V-process production line. Production: 60 complete molds per hour. Flask size: 1300 × 1100 × 400 mm (50 × 40 × 15 in.). Amount of sand: 120 Mg (130 tons/h). Number of operators: 5 More
Image
Published: 01 December 2008
(underside view). The complete shell mold, including shell cores, weighed approximately 135 kg (300 lb), compared to 2040 kg (4500 lb) for a corresponding green sand mold with flask. (b) Front and rear jaws for fifth-wheel coupling. 4.5 kg (10 lb) steel castings (0.25% C, 1.20% Mn) were poured, four More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005241
EISBN: 978-1-62708-187-0
... patterns are removed after the sand is bonded in a flask in cope-and-drag sections ( Fig. 1 ). Cores are separate shapes that are placed in the mold to provide castings with contours, cavities, and passages that are not practical or obtainable with molds. Patterns may be permanent (as is typical in sand...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... patterns are used on highly automated molding machines. The cope pattern is separate from the drag pattern, and separate molding stations are used to make each mold half. Metal flasks hold the sand. Cores may be placed in the molds by hand or by using automated fixtures. In some machines, only squeezing...
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
... Abstract Aggregate molding, or sand casting, is the gravity pouring of liquid metal into a mold that is made of a mixture molded against a permanent pattern. This article summarizes the most important materials in the process of sand casting of cast iron, including different types of molding...
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
... ±0.01–4 The aggregate-binder mixture is used to make the molds through a variety of molding processes. The simplest is making horizontally parted two mold halves in flasks. The mold halves are assembled with or without cores to create the final mold. Other developments, including flaskless...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005308
EISBN: 978-1-62708-187-0
... with the plate. The size of the match plate corresponds to the size of the flask used to make the final mold. Flask pin guides are used to ensure accurate alignment of the match plate pattern in the flask and to assist in pattern removal from the mold. Multiple patterns of small parts can be mounted on a single...
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
... Abstract Cores are separate shapes of sand that are placed in the mold to provide castings with contours, cavities, and passages that are not otherwise practical or physically obtainable by the mold. This article describes the basic principles of coremaking and the types of core sands, binders...