US1896973A - Molding of concrete and like pipes - Google Patents

Molding of concrete and like pipes Download PDF

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Publication number
US1896973A
US1896973A US365571A US36557129A US1896973A US 1896973 A US1896973 A US 1896973A US 365571 A US365571 A US 365571A US 36557129 A US36557129 A US 36557129A US 1896973 A US1896973 A US 1896973A
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United States
Prior art keywords
concrete
pipes
molding
metal
dense
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Expired - Lifetime
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US365571A
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Rutenberg Abraham
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Individual
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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
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/22—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
    • B28B21/30—Centrifugal moulding
    • 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
    • B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
    • B28B21/68—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts and applying centrifugal forces

Definitions

  • This invention relates to the molding of strength and impermeability within the pipe concrete and like pipes and relates more parwall. ticularly to the molding of such pipes by the 2.
  • the object of the invention is to improve the centrifugal or spinning process so that the pipes may remain impervious at relatively high pressures.
  • metal- such as steel or iron-is introduced in small particles into the molds with the concrete.
  • the metal has a specific gravity considerably in excess of the remaining materials, the kinetic energy of the metal particles under the centrifugal force during the spinning action will be reatively greater than that of the other particles and therefore the above metal particles will find their way into the pores of the con crete and will form with the corresponding part of the concrete a layer of a very dense 0 mass of considerably increased tensile strength and impermeability.
  • Such a layer can be formed at will at the outer or inner surface of the pipe or anywhere in the middle of the thickness of the pipe wall, this depending upon the metal being introduced into the mold in the first or in any other consecutive charge of the concrete material.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Description

i atented Feb. 7, 1933 UNITED STATES PATENT? OFFICE ABRAHAM RUTENBERG, F HAIFA, PALESTINE MOLDING 0F CONCRETE AND LIKE PIPES No Drawing. Application filed May 23, 1929, Serial No. 365,571, and in Great Britain June 1, 1928.
This invention relates to the molding of strength and impermeability within the pipe concrete and like pipes and relates more parwall. ticularly to the molding of such pipes by the 2. A process as described in claim 1, but centrifugal or spinning process. used for making very dense and highly im- It is well known in this art that by rotatpermeable concrete linings in pipes or tubes. 55
ing the molds at appropriate speed the ma In testimony whereof he affixes his signaterials become well compacted, thus forming ture.
a dense concrete which is impervious to ABRAHAM RUTENBERG. liquids or gases under low pressures; at higher pressures however it is found that pipes made by this process in the known manner particularly such of large diameter cease to be impermeable. The object of the invention is to improve the centrifugal or spinning process so that the pipes may remain impervious at relatively high pressures.
In the improved process in accordance with the present invention metal-such as steel or iron-is introduced in small particles into the molds with the concrete. As the metal has a specific gravity considerably in excess of the remaining materials, the kinetic energy of the metal particles under the centrifugal force during the spinning action will be reatively greater than that of the other particles and therefore the above metal particles will find their way into the pores of the con crete and will form with the corresponding part of the concrete a layer of a very dense 0 mass of considerably increased tensile strength and impermeability. Such a layer can be formed at will at the outer or inner surface of the pipe or anywhere in the middle of the thickness of the pipe wall, this depending upon the metal being introduced into the mold in the first or in any other consecutive charge of the concrete material.
Having now particularly described and ascertained the nature of my said invention and 90 in what manner the same is to be performed, I declare that what I claim is 1. In a process for molding spun concrete or like pipes by centrifugal force, the step of introducing metal in small particles with V 95 the concrete material into a revoluble mold and due to the higher specific gravity of the metal the metal particles become lodged in pores of the concrete and form with the concrete material a dense layer of increased 100
US365571A 1928-06-01 1929-05-23 Molding of concrete and like pipes Expired - Lifetime US1896973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1896973X 1928-06-01

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US1896973A true US1896973A (en) 1933-02-07

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US365571A Expired - Lifetime US1896973A (en) 1928-06-01 1929-05-23 Molding of concrete and like pipes

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944821A (en) * 1957-11-20 1960-07-12 Modern Plastics Res And Sales Plastic articles of controlled specific gravity having a wear-resistant outer surface and method of preparing the same
US3192289A (en) * 1963-08-30 1965-06-29 Leonard T Jagiello Method of casting solid propellant rocket motors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944821A (en) * 1957-11-20 1960-07-12 Modern Plastics Res And Sales Plastic articles of controlled specific gravity having a wear-resistant outer surface and method of preparing the same
US3192289A (en) * 1963-08-30 1965-06-29 Leonard T Jagiello Method of casting solid propellant rocket motors

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