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patternmaking

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Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006519
EISBN: 978-1-62708-207-5
... Abstract In the investment casting process, molten metal is poured into hot molds, allowing for the production of castings with extremely thin sections, knife edges and sharp detail. This article discusses patternmaking and dimensioning, as well as the pattern materials, such as waxes and...
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
... Abstract This article discusses the types of patterns used for a specific application such as loose patterns, match plate patterns, cope and drag patterns, and special patterns. It describes the principles of the patternmaking techniques used to make expendable molds and for metal casting...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005253
EISBN: 978-1-62708-187-0
... foam and investment casting. It discusses Replicast casting process involving patternmaking with polystyrene and a ceramic shell mold. The article contains a table that summarizes the differences in the steps of casting a part between the permanent pattern and the expendable pattern methods...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005255
EISBN: 978-1-62708-187-0
... Abstract This article reviews the pattern materials used in investment casting. It describes patternmaking process, pattern tooling, and pattern and cluster assembly. The article provides information on melting equipment, casting methods, and the inspection and testing of investment casted...
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
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
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
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
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006326
EISBN: 978-1-62708-179-5
... Abstract This article discusses some of the factors that are linked directly to the casting design of ductile iron castings. It reviews the choice of molding process, application of draft, and patternmaker's allowance that should be taken into consideration in designing castings. The article...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003170
EISBN: 978-1-62708-199-3
... casting. Similar diagrams can be applied to other ferrous and nonferrous alloys produced by sand molding The right side of Fig. 1 begins with the task of patternmaking. A pattern is a specially made model of the component to be produced, used for producing molds. Generally, sand is placed around...
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
..., expanded polystyrene. Source: Ref 2 Outstanding features of the Replicast process include: Surface finish comparable to that obtainable in conventional investment casting Elimination of cores through the use of core inserts in patternmaking tooling; patterns can often be...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009016
EISBN: 978-1-62708-187-0
... interval. Solid shrinkage: The solid casting cools from its solidification temperature to room temperature. Solid shrinkage, also called patternmaker's shrinkage, is accommodated by making the pattern and, therefore; the mold cavity, somewhat larger than the desired dimensions of the final...
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
... 35–43 10 3 8 10 3 8 20 3 4 30 1 18 Patternmaker's shrinkage is the shrinkage allowance built into the pattern to compensate for the change in dimensions caused by the contraction of the cast metal as it cools. This shrinkage allowance is the...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005328
EISBN: 978-1-62708-187-0
..., but tend to chill and become extremely brittle white iron. Sections over 38 mm (1.5 in.) are prone to segregation and porosity, which reduce strength and corrosion resistance. Castings are generally designed with a patternmaker's shrink rule of 18 mm/m ( 7 32 in./ft), or 1.8%. High-silicon...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009020
EISBN: 978-1-62708-187-0
... shrinkage, liquid-to-solid shrinkage, and patternmaker's contraction. As described, the properties of castability influence geometry, and a well-chosen geometry by designers can offset the metallurgical nature of the more difficult-to-cast alloys. Likewise, casting engineers can benefit from an...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009023
EISBN: 978-1-62708-187-0
... casting (a) were produced to the required soundness by adding minimum ribs (a weight consideration) and conforming chills (b). Although risers could have been added to the outside of the vertical wall immediately opposite each boss, this would have introduced problems of patternmaking and molding...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005188
EISBN: 978-1-62708-187-0
... specifications and quality-assurance requirements Assigned responsibilities for and integration of supporting engineering activities among the various production activities. These include the patternmaker, metalcasting facility, machine shop, and heat treater. Cost of quality assessment (rejects, delays...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001069
EISBN: 978-1-62708-162-7
...) min; yield strength, 250 MPa (36 ksi) min at 0.2% offset; elongation, 11% min in 50 min (2 in.) 89 HB (500 kg), typical Tension, 110 GPa (16 × 10 6 psi) at 20 °C (68 °F) 8.81 g/cm 3 (0.318 lb/in. 3 ) at 20 °C (68 °F) Patternmaker's shrinkage, 21 mm/m ( 1 4 in./ft...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009017
EISBN: 978-1-62708-187-0
... equalized. This effect can be achieved by gradually tapering the runner to a smaller cross section along its length, but patternmaking limitations usually make it simpler to incorporate actual steps in the runner. ...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006336
EISBN: 978-1-62708-179-5
... plates can be virtually eliminated by the use of computer-aided design and manufacturing methods and computer numerical control machines in patternmaking. Better process control can eliminate variations in dimensions due to changes in metal composition or feeding methods. Variations in mold rigidity...