1-11 of 11 Search Results for

patternmaking

Sort by
Image
Published: 01 December 1995
Fig. 12-8 A casting design that would normally require different patternmaker’s shrinkage allowances. The dimension “X” will contract freely while contraction of dimension “Y” will be hindered by the core. More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200164
EISBN: 978-1-62708-354-6
... tolerances required, casting design, and pattern cost. It also discusses the factors that should be considered when engineering a pattern. The chapter then presents the types of materials used for pattern construction. It provides an overview of patternmaker's shrinkage allowance. Finally, the chapter...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200133
EISBN: 978-1-62708-354-6
... that will produce complete or partial pattern tooling from solid wood or metal in automatic machining centers ( 12 ). Wherever this can be applied, the accuracy and turn around time can be significantly improved when compared with the traditional construction method by skilled patternmakers using two-dimensional...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140047
EISBN: 978-1-62708-335-5
... and the contraction that takes place after solidification as a result of solid-state contraction that most concerns die design and patternmaking. A sphere of molten metal solidifying without risering is an easily understood example of the diverse ways in which shrinkage forms. Once the shell of the sphere has...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200115
EISBN: 978-1-62708-354-6
... for external cores. The redesigned casting in Figure 7-34(B) is of uniform thickness, weighs less, and was stronger. Savings of 30% in patternmaking and production costs resulted. The cleaning costs were reduced by the elimination of the external ring core and the inside core. Fig. 7-34 Redesign...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200173
EISBN: 978-1-62708-354-6
... are improved. Wood or plastic patternmaking materials can be used. When producing large steel castings, it provides a relatively inexpensive molding process with good results. The disadvantages: They are not high- or medium-production rate molding processes. The skin dried molds still have...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740047
EISBN: 978-1-62708-308-9
... with patternmaking. A pattern is a specially made model of the part to be produced, used for producing molds. Generally, sand is placed around the pattern, and, in the case of clay-bonded sand, rammed to the desired hardness. When chemical binders are used, the mold is chemically hardened after a light manual...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... to the machinability of iron castings. Prevention is within the control of foundries. 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.sch6.9781627083546
EISBN: 978-1-62708-354-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200437
EISBN: 978-1-62708-354-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320063
EISBN: 978-1-62708-332-4
... is very useful when deciding on the extent of machine stock. Castings undergo volumetric contraction as they solidify and cool to room temperature. The tooling is built bigger to compensate for the contraction. The toolmaker or patternmaker assumes a linear contraction percentage when measuring...