JPS5655212A - Manufacture of hollow concrete board - Google Patents

Manufacture of hollow concrete board

Info

Publication number
JPS5655212A
JPS5655212A JP13219979A JP13219979A JPS5655212A JP S5655212 A JPS5655212 A JP S5655212A JP 13219979 A JP13219979 A JP 13219979A JP 13219979 A JP13219979 A JP 13219979A JP S5655212 A JPS5655212 A JP S5655212A
Authority
JP
Japan
Prior art keywords
manufacture
concrete board
hollow concrete
hollow
board
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.)
Pending
Application number
JP13219979A
Other languages
Japanese (ja)
Inventor
Keisuke Shimizu
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.)
Individual
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
Priority to JP13219979A priority Critical patent/JPS5655212A/en
Publication of JPS5655212A publication Critical patent/JPS5655212A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
    • B28B7/32—Cores; Mandrels adjustable, collapsible, or expanding inflatable

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
JP13219979A 1979-10-13 1979-10-13 Manufacture of hollow concrete board Pending JPS5655212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13219979A JPS5655212A (en) 1979-10-13 1979-10-13 Manufacture of hollow concrete board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13219979A JPS5655212A (en) 1979-10-13 1979-10-13 Manufacture of hollow concrete board

Publications (1)

Publication Number Publication Date
JPS5655212A true JPS5655212A (en) 1981-05-15

Family

ID=15075704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13219979A Pending JPS5655212A (en) 1979-10-13 1979-10-13 Manufacture of hollow concrete board

Country Status (1)

Country Link
JP (1) JPS5655212A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058304U (en) * 1983-09-29 1985-04-23 東海ゴム工業株式会社 Rubber mold for hole molding
JPH03151442A (en) * 1989-11-07 1991-06-27 Nippon Rotsukuraapipe Kk Centrifugal reinforced concrete cylindrical body and manufacture thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4328060Y1 (en) * 1966-05-25 1968-11-19
JPS4948452A (en) * 1972-09-11 1974-05-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4328060Y1 (en) * 1966-05-25 1968-11-19
JPS4948452A (en) * 1972-09-11 1974-05-10

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058304U (en) * 1983-09-29 1985-04-23 東海ゴム工業株式会社 Rubber mold for hole molding
JPS6331925Y2 (en) * 1983-09-29 1988-08-25
JPH03151442A (en) * 1989-11-07 1991-06-27 Nippon Rotsukuraapipe Kk Centrifugal reinforced concrete cylindrical body and manufacture thereof

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