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reusable mold

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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
... or draft must be included on the vertical faces of the pattern to permit the removal of reusable patterns from the mold after mold making. Patterns also incorporate provisions for gating and risering (rigging), which facilitate the flow of metal into the mold cavity and subsequent feeding. For castings...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001373
EISBN: 978-1-62708-173-3
... that the gap specified by the manufacturer is achieved Remove slag, moisture, foreign matter, and such from the area to be welded Align the rail ends, both vertically and horizontally Center the thermite molds over the rail gap and seal the gaps with luting material Situate the preheating equipment...
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 lengthy processing procedures and partly because the mold materials are not reusable. Mold processing requires more equipment than is required for most other molding processes. Because of the lengthy processing procedures needed to make plaster molds, duplicate (or multiple) pattern equipment...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003414
EISBN: 978-1-62708-195-5
... Abstract Vacuum infusion is a resin injection technique derived from resin transfer molding. This article discusses the characteristics of the technique and its applications. It presents the theory and background of the technique and provides an illustration of how parts are made. The article...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005257
EISBN: 978-1-62708-187-0
... are most widely used because of their reusability, accurate casting geometry, and high productivity. Mold inside diameters are subject to thermal fatigue no matter what mold material is used. The low-carbon and low-alloyed forged steel molds have much longer fatigue lives than cast steel or cast iron molds...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002492
EISBN: 978-1-62708-194-8
... contact molding, compression-type molding, resin-injection molding, and pultrusion are described. The article also discusses the various factors to be considered in designing for composite manufacturing. ceramic matrix composites composite manufacture compression-type molding contact molding...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003127
EISBN: 978-1-62708-199-3
... Abstract Aluminum casting alloys are the most versatile of all common foundry alloys and generally have the highest castability ratings. Aluminum alloy castings are routinely produced by pressure-die, permanent-mold, green and dry-sand, investment, and plaster casting. This article describes...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006498
EISBN: 978-1-62708-207-5
..., permanent mold, and investment casting, attempt to fill the die cavity in a nonturbulent manner. Using low-viscosity fully liquid metal, typically the metal front velocity must be kept below 0.5 m/s (1.6 ft/s) or so to minimize turbulence ( Ref 4 ). However, attempting to fill a thin-walled steel die cavity...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003395
EISBN: 978-1-62708-195-5
... handling the raw materials as well as mold fabrication and preparation. The second stage is the actual forming process. It is in this process that chemical reactions or phase changes occur or the constituents are consolidated into the desired component as outlined in the Section “Manufacturing Processes...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005260
EISBN: 978-1-62708-187-0
... control THE PERMANENT MOLD CASTING PROCESS involves the production of castings by pouring molten metal into permanent metal molds using gravity, low pressure, vacuum, or centrifugal pressure. Simple reusable cores are usually made of metal. More complex cores are made of sand, plaster, ceramics...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003413
EISBN: 978-1-62708-195-5
... be extracted after venting. The bladder itself may be sacrificial or reusable. Fig. 12 Bladder inflation molding for hollow RTM structures. Source: Ref 16 Laminate/Preform Design As with prepregs, the reinforcement dominates laminate stiffness and on-axis properties. When fabrics are used...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001082
EISBN: 978-1-62708-162-7
... extent for several years. Semipermanent, reusable molds, frequently made from machined graphite, have been used successfully since the earliest U.S. Bureau of Mines work ( Ref 13 , 15 ) but only on relatively simple-shape parts that allow metal volumetric shrinkage to occur without restriction...
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
..., 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...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003486
EISBN: 978-1-62708-195-5
... processing by direct metal oxidation. ZrB<sub>2</sub> Platelet-Reinforced ZrC Composites To form this composite, molten zirconium is directionally reacted with B 4 C powder in a graphite mold at temperatures of about 1850 to 2000 °C (3350 to 3630 °F) ( Ref 20 ). The B 4 C is completely reacted to form...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... Abstract This article discusses classification of foundry processes based on the molding medium, such as sand molds, ceramic molds, and metallic molds. Sand molds can be briefly classified into two types: bonded sand molds, and unbonded sand molds. Bonded sand molds include green sand molds...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003409
EISBN: 978-1-62708-195-5
... established low-cost resins. These thin materials naturally have a low hand-deposition rate, but the labor cost represents a small proportion of the overall manufacturing cost. For low-volume production of thin structures, the manufacturing cost is dominated by mold tooling and assembly costs. Over...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002484
EISBN: 978-1-62708-194-8
... be a reusable aggregate, such as sand, or a metal mold, used in permanent mold and die casting. The metal is delivered to the mold cavity through channels in the mold or die, which are called runners. The passages between the runner and the mold cavity, where the metal enters the mold, are called gates...
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...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005299
EISBN: 978-1-62708-187-0
... Abstract Sand mold and permanent mold casting are the major methods for shape casting of steels, with production closely split among green sand, chemically bonded sand, and permanent mold processes. This article describes key aspects of the steel casting process, including steel solidification...
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
.... Permanent Mold Casting Permanent mold processes involve the production of castings by pouring molten metal into permanent metal molds using gravity, low pressure, vacuum or centrifugal pressure. Simple reusable cores are usually made of metal. More complex cores are made of sand, plaster, ceramics...