GB1107656A - Pattern assembly for shell molds and methods - Google Patents

Pattern assembly for shell molds and methods

Info

Publication number
GB1107656A
GB1107656A GB1257866A GB1257866A GB1107656A GB 1107656 A GB1107656 A GB 1107656A GB 1257866 A GB1257866 A GB 1257866A GB 1257866 A GB1257866 A GB 1257866A GB 1107656 A GB1107656 A GB 1107656A
Authority
GB
United Kingdom
Prior art keywords
wax
crucible
heat
heating
disposable
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.)
Expired
Application number
GB1257866A
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.)
Howmet Corp
Original Assignee
Howmet Corp
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 Howmet Corp filed Critical Howmet Corp
Publication of GB1107656A publication Critical patent/GB1107656A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

1,107,656. Shell moulds; disposable patterns. HOWMET CORPORATION. 22 March, 1966 [15 April, 1965], No. 12578/66. Heading B5A. Shell moulds are formed by the "lost-wax'' process, using a pattern comprising a first portion, including at least one pattern member conforming to the configuration of articles to be moulded, and being of heat disposable material, and a second "crucible " portion, of heat resistant material, and releasably attached to said first portion; a ceramic shell is formed about the external faces of the pattern and the second "crucible" portion is removed therefrom before heating to remove said first portion. Said second " crucible " portion is preferably covered by a heat-disposable film, e.g. of plastics, which is removed by heating simultaneously with said first portion. The degree of cracking of the shell mould due to the expansion of the wax during removal is reduced in the region of the "crucible" portion by this means. Removal of wax may be effected by heating rapidly to a temperature considerably above the melting point so that the surface of the wax melts without through heating and consequent expansion and mould cracking. The heat disposable material may be wax or a plastics-wax mixture and the heat resistant material may be metal; there may be a threaded connection therebetween. A heat resistant rod may extend into said first portion, connected to the "crucible" portion and removable therewith.
GB1257866A 1965-04-15 1966-03-22 Pattern assembly for shell molds and methods Expired GB1107656A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US44847065A 1965-04-15 1965-04-15

Publications (1)

Publication Number Publication Date
GB1107656A true GB1107656A (en) 1968-03-27

Family

ID=23780426

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257866A Expired GB1107656A (en) 1965-04-15 1966-03-22 Pattern assembly for shell molds and methods

Country Status (2)

Country Link
GB (1) GB1107656A (en)
SE (1) SE321055B (en)

Also Published As

Publication number Publication date
SE321055B (en) 1970-02-23

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