CA2105361A1 - Method of Expendable Pattern Casting Using Sand with Specific Thermal Properties - Google Patents

Method of Expendable Pattern Casting Using Sand with Specific Thermal Properties

Info

Publication number
CA2105361A1
CA2105361A1 CA 2105361 CA2105361A CA2105361A1 CA 2105361 A1 CA2105361 A1 CA 2105361A1 CA 2105361 CA2105361 CA 2105361 CA 2105361 A CA2105361 A CA 2105361A CA 2105361 A1 CA2105361 A1 CA 2105361A1
Authority
CA
Canada
Prior art keywords
pattern
sand
cast
thermal properties
specific thermal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2105361
Other languages
French (fr)
Other versions
CA2105361C (en
Inventor
Raymond J. Donahue
Terrance M. Cleary
William G. Hesterberg
Terry C. Holmgren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brunswick Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2105361A1 publication Critical patent/CA2105361A1/en
Application granted granted Critical
Publication of CA2105361C publication Critical patent/CA2105361C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

A method of producing a metal casting utilizing an expendable polymeric foam pattern along with unbonded sand having specific thermal properties. The pattern, formed of a material such as polystyrene, has a configuration corresponding to that of the article to be cast. The pattern is placed with an outer flask and unbonded sand surrounds the pattern as well as filling the cavities in the pattern. The sand has a linear expansion of less than 1% from 0°C to 1600°C, a particle size of 0.001 inch to 0.015 inch, and a heat diffusivity greater than 1500 J/m2/°K/s1/2. A molten metal, such as a hypoeutectic or hypereutectic aluminum silicon alloy or a ferrous alloy, is fed into the mold in contact with the pattern causing the pattern to vaporize with the vapor being entrapped within the interstices of the sand while the molten metal fills the space initially occupied by the foam pattern to produce a cast article. The physical properties of the sand enable articles to be cast having more precise tolerances.
CA 2105361 1992-09-04 1993-09-01 Method of expendable pattern casting using sand with specific thermal properties Expired - Lifetime CA2105361C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94048592A 1992-09-04 1992-09-04
US940,485 1992-09-04

Publications (2)

Publication Number Publication Date
CA2105361A1 true CA2105361A1 (en) 1994-03-05
CA2105361C CA2105361C (en) 2001-01-02

Family

ID=25474912

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2105361 Expired - Lifetime CA2105361C (en) 1992-09-04 1993-09-01 Method of expendable pattern casting using sand with specific thermal properties

Country Status (1)

Country Link
CA (1) CA2105361C (en)

Also Published As

Publication number Publication date
CA2105361C (en) 2001-01-02

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Legal Events

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