US3177554A - Vibration device enclosed in the core of molds for casting concrete pipes - Google Patents

Vibration device enclosed in the core of molds for casting concrete pipes Download PDF

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Publication number
US3177554A
US3177554A US286571A US28657163A US3177554A US 3177554 A US3177554 A US 3177554A US 286571 A US286571 A US 286571A US 28657163 A US28657163 A US 28657163A US 3177554 A US3177554 A US 3177554A
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US
United States
Prior art keywords
core
eccentric
shaft
masses
vibration device
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 - Lifetime
Application number
US286571A
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English (en)
Inventor
Larkfeldt Owe Carl Gunnar
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.)
Skanska AB
Original Assignee
Skanska Cementgjuteriet AB
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Publication date
Application filed by Skanska Cementgjuteriet AB filed Critical Skanska Cementgjuteriet AB
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    • 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
    • B28B21/14—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means vibrating, e.g. the surface of the material
    • B28B21/16—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means vibrating, e.g. the surface of the material one or more mould elements

Definitions

  • This invention relates to a vibration device enclosed in the core of molds for casting concrete pipes especially reinforced concrete pipes.
  • the vibrator In known devices in which the vibrator is enclosed in the mold core the vibrator consists of a unitary eccentric element having eccentric masses secured to a rotary shaft.
  • the conventional casting operation combined with vibration has been found to be involved with certain inconveniences which in the casting operation of reinforced concrete pipes manifest themselves in the form of circumferential displacement of the reinforcing members, which is especially disadvantageous if lying reinforcing members are used consisting of oval iron rings the positions of which in the final pipe cannot be ascertained and are of decisive importance to the position in which the pipes are to be deposited in the ground to attain the advantage of the oval reinforcement.
  • the vibration device provided in the core comprises eccentric elements adapted to rotate in opposite directions. Due to this arrangement the unilateral travel of the concrete mass occurring with the use of a single vibration element is avoided so that the reinforcing iron will not be dislocated.
  • another often undesired effect may be induced because of a possible directional movement of the core in a direction at right angles to the position in which the radii of the two eccentric masses are pointing in opposite directions in alignment with each other, resulting in that the concrete in the places extending at right angles to the directional movement will not be considerably compressed.
  • a preferred embodiment of the invention is characterized in that the eccentric elements rotating in opposite direction are driven at different speeds, preferably at slightly different speeds.
  • the eccentric elements rotating in opposite direction are driven at different speeds, preferably at slightly different speeds.
  • each eccentric element may be divided into two or more eccentric masses or Weights which may be axially spaced apart in which case weights rotating in one direction may be disposed axially between weights rotating in the opposite direction, and it will also be understood that there may be provided eccentric Weights rotating at different speeds in the same direction always in combination with weights rotating in the oppositedirection.
  • the masses rotating in different directions should be of equal magnitudes.
  • FIG. 1 is a vertical sectional view of a mold provided with a device in accordance with the invention.
  • FIG. 2 is an enlarged axial sectional sectional view of an emllgliglrrient of one of the eccentric elements illustrated in
  • numeral 1 denotes the external wall of the mold and numeral 2 denotes a tubular mold core.
  • the external wall can be removed either by being longitudinally divided or by vertical displacement relative to the core.
  • the fnished pipe rests on a bottom ring 5 which in the embodiment illustrated is suspended from the tubular core 2 and displaceable along the core.
  • the vibration device is housed in a separate tube 6 which by means of transverse walls 7 is connected to the wall of the core.
  • the vibration device is driven by an electric motor 8 disposed at the lower part of the core.
  • two eccentric elements rotating in opposite directions are provided on a common axis.
  • One of the eccentric elements is divided into two groups or parts each having an eccentric mass or masses, one part A being located at the upper end of the core and the other part A being located at the lower part of the core. Between these parts of the element there is provided a second eccentric element B rotating in a direction opposite to the direction of rotation of the element A, A.
  • the motor 8 carried by the table 3 has a central shaft 9 which in the embodiment illustrated directly drives the eccentric element A, A.
  • the shaft is divided into a plurality of lengths interconnected by elastic clutches 10 and mounted in the bearing boxes 11, 11' and 12 associated with the eccentric elements. By means of rings 13 the bearing boxes are connected to the tube 6.
  • the shaft part mounted in the bearing box 11 carries eccentric weights l4, and the shaft part mounted in the bearing box 11' carries eccentric weights 14.
  • the shaft parts are considered to be supporting shafts for the appertain-
  • a sprocket Wheel 19 to which movement is imparted from the sprocket wheel 18 by means of a chain.
  • the gear. ratio of the gear wheels 20, 21 or sprocket wheels '18, 19 the desired speed difference between'the shafts 9 and 15 can be obtained.
  • sprockets 18, 19, gear wheels maybe used in which case a reversing wheel ,is provided in the transmission to re-" 4 2 679 384 30 I J v verse the direction of rotation ofthe driven shaft;
  • FIGS. 1 and 2 The arrangementillustrated by way ofexample in FIGS. 1 and 2 may be modified within Widelimits of the scope of the invention.
  • An exas mentioned above may compriseshafts located side by side and having individual drive motors or 'a common drive motor.
  • Y g 1 a mold for casting concrete pipes, a mold core, a vibration 'devicehoused in'said core and comprising first and second rotatable eccentric elements, saidfirst eccentric element comprising eccentric masses provided 'one at eitherend of and out of contactfwith said core,
  • a first's'haft carrying 1said masses, a tubular shaft surrounding said first shaft; and .said' second eccentric element comprising an eccentric mass' mounted: on said tubular shaft between said 'first namedmasses and out of contact withsaid core and means onone of said shafts V for engaging a driving means 'on'the other of said shafts so that rotation of one of said shafts in one direction will rotate the other shaft in the opposite direction;
  • mission gear has a transmission ratio slightly differing

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
US286571A 1962-06-25 1963-06-10 Vibration device enclosed in the core of molds for casting concrete pipes Expired - Lifetime US3177554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE705162 1962-06-25

Publications (1)

Publication Number Publication Date
US3177554A true US3177554A (en) 1965-04-13

Family

ID=20270280

Family Applications (1)

Application Number Title Priority Date Filing Date
US286571A Expired - Lifetime US3177554A (en) 1962-06-25 1963-06-10 Vibration device enclosed in the core of molds for casting concrete pipes

Country Status (7)

Country Link
US (1) US3177554A (en:Method)
AT (1) AT244200B (en:Method)
CH (1) CH420959A (en:Method)
DE (1) DE1459222C3 (en:Method)
DK (1) DK107014C (en:Method)
FI (1) FI40273B (en:Method)
GB (1) GB961831A (en:Method)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268177A (en) * 1963-08-27 1966-08-23 Southwestern Eng Co Vibro-energy mill
US3323188A (en) * 1964-10-29 1967-06-06 Martin Lewis Jr Apparatus for molding and compacting hollow concrete products including pulsating water vibrator means
US3948354A (en) * 1974-09-18 1976-04-06 Hydrotile Machinery Company Lubricator for concrete pipe vibrators
US4067679A (en) * 1975-09-25 1978-01-10 Pedershaab Maskinfabrik A/S Machine for making concrete pipes in upright position
US4861252A (en) * 1986-09-11 1989-08-29 International Pipe Machinery Corp. Vibrator type concrete pipe making machines having combined lubrication and cooling system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510562A1 (de) * 1995-03-23 1996-09-26 Baumgaertner Maschf Gmbh Rütteleinrichtung
DE19955547A1 (de) * 1999-11-18 2001-05-31 Uwe Kischke Rütteleinrichtung für Schalungskerne mit rotationssymmetischem Querschnitt

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1293662A (en) * 1918-06-08 1919-02-11 Grosvenor Atterbury Apparatus for casting cementitious material.
US2356852A (en) * 1942-01-28 1944-08-29 George W Hutchinson Method and apparatus for making concrete pipe
US2679384A (en) * 1950-12-06 1954-05-25 Livingston Construction Compan Vibrator
CA566423A (en) * 1958-11-25 W. Hoffmann George Concrete pipe forming machine
CA603574A (en) * 1960-08-16 Pedershaab Maskinfabrik A/S Arrangement in machines for the casting of tubes and other hollow bodies

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA566423A (en) * 1958-11-25 W. Hoffmann George Concrete pipe forming machine
CA603574A (en) * 1960-08-16 Pedershaab Maskinfabrik A/S Arrangement in machines for the casting of tubes and other hollow bodies
US1293662A (en) * 1918-06-08 1919-02-11 Grosvenor Atterbury Apparatus for casting cementitious material.
US2356852A (en) * 1942-01-28 1944-08-29 George W Hutchinson Method and apparatus for making concrete pipe
US2679384A (en) * 1950-12-06 1954-05-25 Livingston Construction Compan Vibrator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268177A (en) * 1963-08-27 1966-08-23 Southwestern Eng Co Vibro-energy mill
US3323188A (en) * 1964-10-29 1967-06-06 Martin Lewis Jr Apparatus for molding and compacting hollow concrete products including pulsating water vibrator means
US3948354A (en) * 1974-09-18 1976-04-06 Hydrotile Machinery Company Lubricator for concrete pipe vibrators
US4067679A (en) * 1975-09-25 1978-01-10 Pedershaab Maskinfabrik A/S Machine for making concrete pipes in upright position
US4861252A (en) * 1986-09-11 1989-08-29 International Pipe Machinery Corp. Vibrator type concrete pipe making machines having combined lubrication and cooling system

Also Published As

Publication number Publication date
FI40273B (en:Method) 1968-07-31
DE1459222C3 (de) 1976-01-08
CH420959A (de) 1966-09-15
GB961831A (en) 1964-06-24
DK107014C (da) 1967-04-10
DE1459222A1 (de) 1968-11-28
AT244200B (de) 1965-12-27

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