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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
...Abstract 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...
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 Abstract Investment casting, in which molten metal is poured into hot molds, allows for the production of aluminum parts with extremely thin sections, knife edges and sharp detail. This article describes the various steps in the investment casting process, including patternmaking...
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
..., such as lost foam and investment casting. It discusses the Replicast casting process that involves 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 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 Abstract This article reviews the pattern materials used in investment casting, which can be loosely grouped into waxes and plastics. The patternmaking process, pattern tooling, and pattern and cluster assembly are described. The article also describes the manufacture of ceramic shell...
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 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...
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
...) Fatigue Strength 62 MPa (9 ksi) at 10 8 cycles Mass Characteristics Density 8.94 g/cm 3 (0.323 lb/in. 3 ) at 20 °C (68 °F) Volume Change on Freezing 4.92% contraction Patternmaker's Shrinkage 21 mm/m ( 1 4 in./ft) Thermal Properties Liquidus Temperature...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003170
EISBN: 978-1-62708-199-3
... flow diagram of the basic operations for producing a steel 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...
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
... Capabilities 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 produced in one piece, including risers...
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
... capacity of silicon atoms revives aluminum atoms as their fluid life begins to wane. Solidification Shrinkage The three distinct stages of shrinkage as molten metals solidify are liquid shrinkage, liquid-to-solid shrinkage, and patternmaker's contraction. Liquid Shrinkage Liquid shrinkage...
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
... 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, rework, etc.) Scheduling and lead...
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
... temperature range or freezing 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...
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
... 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 factor with which the moldmaker...
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
... 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 and could have...
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
... 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%. Heat Treatment High-silicon irons can...
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
... velocities and pressures at the two ingates can be 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. Design Considerations In applying...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003108
EISBN: 978-1-62708-199-3
... desired in the finished castings. Typically, ductile iron requires less compensation than any other cast ferrous metal. The allowances in patternmaker rules (shrink rules) are usually: Type of cast metal Shrinkage allowance, % Ductile iron 0–0.7 Gray iron 1.0 Malleable iron 1.0...
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
... under control, thus reducing scrap and rework costs. Differences in pattern size when using multipattern 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...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001096
EISBN: 978-1-62708-162-7
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
... of the pattern material is often desired. Patternmaking begins with the dimensions of the casting, but many features and allowances are to be incorporated before the final pattern size is determined. As a first measure for effective patternmaking, the dimensions must be oversized compared to the final...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.9781627081627
EISBN: 978-1-62708-162-7