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GB1118914A - Improvements in or relating to moulding sand - Google Patents

Improvements in or relating to moulding sand

Info

Publication number
GB1118914A
GB1118914A GB4578665A GB4578665A GB1118914A GB 1118914 A GB1118914 A GB 1118914A GB 4578665 A GB4578665 A GB 4578665A GB 4578665 A GB4578665 A GB 4578665A GB 1118914 A GB1118914 A GB 1118914A
Authority
GB
United Kingdom
Prior art keywords
moulding sand
particles
relating
polystyrene
mould
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
GB4578665A
Inventor
Georgi Stoitshev Angelov
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.)
ZD 12
Original Assignee
ZD 12
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 ZD 12 filed Critical ZD 12
Publication of GB1118914A publication Critical patent/GB1118914A/en
Expired 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
    • B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

Particles of foamed polystyrene are mixed with moulding sand to increase the gas permeability of moulds and cores when the polystyrene melts, burns or vaporizes at the hardening stage or because of the heat of the metal when it is poured into the mould. The inner layer forming the mould surface may contain a small amount of foamed polystyrene as small particles, but the outer layers may have greater quantities as larger particles.
GB4578665A 1964-10-30 1965-10-28 Improvements in or relating to moulding sand Expired GB1118914A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BG91964 1964-10-30

Publications (1)

Publication Number Publication Date
GB1118914A true GB1118914A (en) 1968-07-03

Family

ID=3897219

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4578665A Expired GB1118914A (en) 1964-10-30 1965-10-28 Improvements in or relating to moulding sand

Country Status (3)

Country Link
DE (1) DE1269772B (en)
FR (1) FR1451754A (en)
GB (1) GB1118914A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100901912B1 (en) 2003-09-02 2009-06-10 신토고교 가부시키가이샤 Method of forming mold and core for metal casting

Also Published As

Publication number Publication date
DE1269772B (en) 1968-06-06
FR1451754A (en) 1966-01-07

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