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match plate patterns
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Image
Published: 01 December 2008
Image
Published: 01 December 2008
Image
Published: 01 December 2008
Fig. 3 Steps in producing a match plate pattern from a master pattern. (a) Wood master pattern is constructed with appropriate shrinkage factors included. A reverse from the master pattern. (b) Reverse mold is used to cast the polyurethane pattern on the aluminum match plate. (c) Reverse mold
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Image
Published: 01 December 2008
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...
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 processes such as die casting and permanent mold casting. The article reviews the pattern features and mold production considerations used in the pattern design, namely, parting line considerations, addition of gates and risers, core prints, and locating points. It examines the pattern allowances for ensuring a dimensionally correct final pattern. A variety of materials and advanced composite materials used in the manufacture of patterns are discussed. The article evaluates the factors influencing the selection of type of patterns for specific castings.
Image
Published: 01 December 2008
Image
Published: 01 December 2008
Fig. 2 Three types of patterns used to produce a water pump casting in various quantities. (a) Wood pattern on a follow board, good for 20 to 30 castings. (b) Match plate pattern for up to 50,000 castings depending on material. (c) Cope and drag plastic (up to 20,000 castings) or metal
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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
..., high-alumina mullite slurries for molding. The Shaw process and the proprietary Unicast processes are also discussed. ceramic molding foamed plaster process match plate pattern molding plaster molding conventional plaster mold casting slurry molding Antioch process Shaw process Unicast...
Abstract
This article discusses slurry molding that encompasses two distinct processes: plaster molding and ceramic molding. Plaster mold casting is a specialized casting process used to produce nonferrous castings that have greater dimensional accuracy, smoother surfaces, and more finely reproduced detail. The article describes three generally recognized plaster mold processes, namely, conventional plaster mold casting, the Antioch process, and the foamed plaster process. Ceramic molding techniques are based on processes that employ permanent patterns and fine-grained zircon and calcined, high-alumina mullite slurries for molding. The Shaw process and the proprietary Unicast processes are also discussed.
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 squeezing, just as cope and drag patterns are ( Fig. 9 ). Fig. 8 Primary components of a match plate (squeezer) pattern Fig. 9 Drag half of a cope and drag pattern Second-Generation Machines Foundry technology has progressed rapidly since the mid-1950s, and molding methods have...
Abstract
Green sand molding and chemically bonded sand molding are considered to be the most basic and widely used mold-making processes. This article describes the sand system formulation, preparation, mulling, mold fabrication, and handling of green sand molds. It lists the advantages 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. It considers a variety of sand reclamation systems, including wet washing/scrubbing and thermal-calcining/thermal-dry scrubbing combinations.
Image
Published: 31 October 2011
Fig. 5 Difference in grain size within the ring patterns observed in the horizontal-section microstructure of a bead-on-plate run of cast A356 alloy. The tool advance per revolution (APR) was 0.1 mm (0.004 in.). Note that the gap between the bands matches the APR from Ref 34 .
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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... accurately to maintain casting dimensions. Cores are placed in the drag half of the mold after the pattern is drawn from the mold and before the cope is placed on the drag to close the mold. Match-plate patterns are split patterns in which the pattern that will make the cope is on one side of the plate...
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, dry sand molds, resin-bonded sand molds, and sodium silicate bonded sand. The article describes the casting processes that use these molds, including the no-bake process, cold box process, hot box process, the CO2 process, lost foam casting process and vacuum molding process. The casting processes that use ceramic molds include investment casting, and plaster casting. Metallic molds are used in permanent mold casting, die casting, semisolid casting, and centrifugal casting.
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002154
EISBN: 978-1-62708-188-7
... for spherical surfaces, and specialized single- or double-plate machines (such as ball, roller, or pin laps) constitute the vast majority of lapping installations. Matched-Piece Lapping In matched-piece lapping, sometimes called equalizing, two workpiece surfaces separated only by a layer of abrasive...
Abstract
Lapping is the lower-pressure, lower-speed, and lower-power application of the use of fixed abrasives. This article begins with a discussion on the process capabilities of lapping and reviews the selection of abrasive and vehicle for lapping. It describes the methods of lapping outer cylindrical surfaces, namely, ring lapping, machine lapping between plates, centerless roll lapping with loose abrasives, and centerless lapping with bonded abrasives. In addition, the article discusses the methods employed for lapping of outer surfaces of piston rings, crankshafts, inner cylindrical surfaces, flat surfaces, end surfaces, spherical surfaces, balls, spring like parts, and gears. It also reviews the problems in flat and end lapping. The article concludes information on the use of lapping in accelerated wearing-in process for matching and aligning components of bearing assemblies.
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003542
EISBN: 978-1-62708-180-1
... expansion of the material. The fracture markings are no different in thermal-shock failure than in failures produced by mechanical loading. However, there are some characteristics of crack patterns, especially in plates, that set thermal-shock failure apart from failures due to uniaxial tension...
Abstract
Fractography is the means and methods for characterizing a fractured specimen or component. This includes the examination of fracture-exposed surfaces and the interpretation of the fracture markings as well as the examination and interpretation of crack patterns. This article describes the former of these two parts of fractography. It presents the techniques of fractography and explains fracture markings using glass and ceramic examples. The article also discusses the fracture modes in ceramics and provides examples of fracture origins.
Book: Fractography
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 June 2024
DOI: 10.31399/asm.hb.v12.a0006880
EISBN: 978-1-62708-387-4
... between the piece and the quenching medium, and the coefficient of thermal expansion of the material. The fracture markings are no different in thermal-shock failure than in failures produced by mechanical loading. However, there are some characteristics of crack patterns, especially in plates, that set...
Abstract
Fractography is the means and methods for characterizing a fractured specimen or component. This includes the examination of fracture-exposed surfaces and the interpretation of the fracture markings, and the examination and interpretation of crack patterns. This article deals primarily with the first of these two parts of fractography. Techniques of fractography are presented, fracture markings are explained using glass and ceramic examples, fracture modes in ceramics are discussed, and examples of fracture origins are given.
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006656
EISBN: 978-1-62708-213-6
...), although modified and carried out by using computer-based search-match methods ( Ref 5 ). All computer methods make use of a diffraction pattern reference database, i.e., the International Centre for Diffraction Data Powder Diffraction File (PDF) ( Ref 6 ). For μXRD data collected using a 2-D detector...
Abstract
This article discusses various concepts of micro x-ray diffraction (XRD) used for the examination of materials in situ. The discussion covers the principles, equipment used, sample preparation procedure, considerations for calibrating a detector, steps for performing data analysis, and applications and interpretation of micro-XRD.
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006458
EISBN: 978-1-62708-190-0
... to applications where PETs require delay lines or phase-matching wedges ( Ref 5 , 28 ). It is quite likely that there are many situations, such as generating guided and surface waves under industrial conditions, where the signal-to-noise ratio that can be achieved in an EMAT-based UNDE system could exceed...
Abstract
This article describes the basic features of electromagnetic acoustic transducers (EMATs) and discusses their existing and some potential uses within the field of ultrasonic nondestructive evaluation (UNDE). It provides sufficient basic and practical information to make an informed choice when considering the transducer to be used for any particular UNDE application. The article describes how different types of EMATs operate and presents their fundamental and some practical limitations. It summarizes the representative literature for electromagnetic acoustic transducer UNDE applications. Some successful uses of EMATs are mentioned to illustrate the depth, range, and potential of commercial EMAT applications. The article concludes with information on the commercial sources for EMAT systems and components.
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001757
EISBN: 978-1-62708-178-8
... on the pattern is used to determine which group is to be consulted in the manual. The d value of the second strongest line in the unknown determines which subgroup to investigate to determine one or more patterns that match the other intense lines on the unknown pattern. If the other six lines of one...
Abstract
X-ray powder diffraction (XRPD) techniques are used to characterize samples in the form of loose powders or aggregates of finely divided material that readily diffract x-rays in specified patterns. This article provides an introduction to XRPD, beginning with a review of sensing devices, including pinhole/Laue cameras, Debye-Scherrer/Gandolfi cameras, Guinier cameras, glancing angle cameras, conventional diffractometers, thin film diffractometers, Guinier diffractometers, and micro diffractometers. The article then describes several quantitative measurement methods, such as lattice parameter, absorption diffraction, spiking, and direct comparison, explaining where each may be used. It also identifies potential sources of error in XRPD measurements.
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
... the dimensions are finalized, the next step is the placement of a parting line. Because most sand molds are produced in two or more parts, the parting lines are important to facilitate ease of molding. Any undercuts are accommodated by placement of cores. Types of patterns include loose, match plate, cope...
Abstract
Sand casting processes are typically classified according to the type of binder present in the molding sand mixture. This article discusses common sand casting processes and design considerations related to shape, gating, feeding, and pattern making methods. It describes the composition of sand and binder normally used, and provides information on the aluminum casting alloys produced. The article discusses precision sand casting and sand reclamation, and includes information on health and safety considerations.
Book Chapter
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
... polystyrene (EPS). One previous name of this process was EPS casting. The EPS material is very similar to the material used for foam coffee cups, and plates, etc. The foam pattern embodies the positive shape of the part to be cast ( Fig. 6 ). The foam pattern can be produced by hand crafting or machining...
Abstract
This article provides a general introduction on casting processes and design techniques. It discusses the process steps and methods of the main categories of shape casting methods, namely, expendable molds with permanent patterns, expendable molds with expendable patterns, and metal or permanent mold processes. The article lists the general guidelines of geometry in casting design. It describes the three separate contractions that are a result of cooling: liquid-liquid contraction, solid-solid contraction, and liquid-solid contraction. Factors influencing the solidification sequence of simple shapes, such as T-sections, X-sections, and L-sections, are discussed. The article also presents an overview of geometric factors that influence heat transfer and transport phenomena. It concludes with a description of the structure and properties of castings.
Book Chapter
Book: Composites
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003433
EISBN: 978-1-62708-195-5
.... The thermomechanical properties of tooling materials have evolved such that they more closely match those of the production part to be fabricated. In addition to improvements in materials properties, today's tooling materials offer lower fabrication and materials costs. The advancements in CADCAM models have also...
Abstract
Tooling and assembly methodologies for advanced composites have steadily improved as a result of advancements in materials, through the use of computer-aided design/computer-aided manufacturing technology, and through application of sophisticated design for manufacturing and assembly concepts. This article reviews techniques and technologies that are used to control the quality of tooling and assembly methods for composite components.
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