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GB381551A - Improvements in or relating to the manufacture of moulded materials - Google Patents

Improvements in or relating to the manufacture of moulded materials

Info

Publication number
GB381551A
GB381551A GB12656/31A GB1265631A GB381551A GB 381551 A GB381551 A GB 381551A GB 12656/31 A GB12656/31 A GB 12656/31A GB 1265631 A GB1265631 A GB 1265631A GB 381551 A GB381551 A GB 381551A
Authority
GB
United Kingdom
Prior art keywords
layers
layer
mould
thickness
cement
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
GB12656/31A
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.)
GIRA SOC
Original Assignee
GIRA SOC
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 GIRA SOC filed Critical GIRA SOC
Publication of GB381551A publication Critical patent/GB381551A/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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/70—Methods or machines specially adapted for the production of tubular articles by building-up from preformed elements
    • B28B21/72—Producing multilayer tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

In the method of making pipes and other hollow bodies of concrete by centrifugal moulding wherein the bodies immediately after moulding consist of superposed layers, one layer or set of layers containing the largest particles being hard and rigid but fragile, and the alternate layer or layers being coherent but deformable and composed of very fine concrete rich in cement, or of asphalt, the operation is carried out so that the one layer or set of layers has sufficient rigidity to compensate for the deformability of the other layer or set of layers, and the latter have sufficient coherence to compensate for the fragility of the former layer or set of layers so as to produce a stable body which is removed from the mould immediately upon cessation of the rotation of the mould. The largest particles of aggregate should have linear dimensions lying between 1/4 and 1/7 of the thickness of the wall of the article and the inner coherent layer should have a thickness of 1/10 , or a little more, of the thickness of the wall and contain an amount of cement of the order of 70 per cent. The article, particularly if of large diameter, is advantageously removed from the mould in an upright position.
GB12656/31A 1930-06-17 1931-04-29 Improvements in or relating to the manufacture of moulded materials Expired GB381551A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR381551X 1930-06-17

Publications (1)

Publication Number Publication Date
GB381551A true GB381551A (en) 1932-09-29

Family

ID=8895376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12656/31A Expired GB381551A (en) 1930-06-17 1931-04-29 Improvements in or relating to the manufacture of moulded materials

Country Status (1)

Country Link
GB (1) GB381551A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860275A (en) * 1955-02-09 1958-11-11 Philips Corp Indirectly heated cathode
US2887728A (en) * 1954-05-14 1959-05-26 Reflin Co Method of centrifugally casting a pipe using thermoplastic and thermosetting resins

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887728A (en) * 1954-05-14 1959-05-26 Reflin Co Method of centrifugally casting a pipe using thermoplastic and thermosetting resins
US2860275A (en) * 1955-02-09 1958-11-11 Philips Corp Indirectly heated cathode

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