FR774994A - Internal metal mold with automatic expansion and contraction - Google Patents

Internal metal mold with automatic expansion and contraction

Info

Publication number
FR774994A
FR774994A FR774994DA FR774994A FR 774994 A FR774994 A FR 774994A FR 774994D A FR774994D A FR 774994DA FR 774994 A FR774994 A FR 774994A
Authority
FR
France
Prior art keywords
contraction
metal mold
internal metal
automatic expansion
expansion
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
Other languages
French (fr)
Inventor
Venturini Alfred
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 filed Critical
Application granted granted Critical
Publication of FR774994A publication Critical patent/FR774994A/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
FR774994D 1934-05-29 1934-05-29 Internal metal mold with automatic expansion and contraction Expired FR774994A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR774994T 1934-05-29

Publications (1)

Publication Number Publication Date
FR774994A true FR774994A (en) 1934-12-17

Family

ID=9200198

Family Applications (1)

Application Number Title Priority Date Filing Date
FR774994D Expired FR774994A (en) 1934-05-29 1934-05-29 Internal metal mold with automatic expansion and contraction

Country Status (1)

Country Link
FR (1) FR774994A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2664613A (en) * 1950-03-13 1954-01-05 Wallace Alfred Evans Molding core
US3784338A (en) * 1970-04-09 1974-01-08 Pirelli Expansible sector core for curing belts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2664613A (en) * 1950-03-13 1954-01-05 Wallace Alfred Evans Molding core
US3784338A (en) * 1970-04-09 1974-01-08 Pirelli Expansible sector core for curing belts

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