EP0365154A2 - Mischgerät - Google Patents

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Publication number
EP0365154A2
EP0365154A2 EP89309746A EP89309746A EP0365154A2 EP 0365154 A2 EP0365154 A2 EP 0365154A2 EP 89309746 A EP89309746 A EP 89309746A EP 89309746 A EP89309746 A EP 89309746A EP 0365154 A2 EP0365154 A2 EP 0365154A2
Authority
EP
European Patent Office
Prior art keywords
drum
ribs
wall
mixing
end wall
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.)
Withdrawn
Application number
EP89309746A
Other languages
English (en)
French (fr)
Other versions
EP0365154A3 (de
Inventor
John Richard Courtney
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.)
MIXER BEND Ltd
Original Assignee
MIXER BEND Ltd
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 MIXER BEND Ltd filed Critical MIXER BEND Ltd
Publication of EP0365154A2 publication Critical patent/EP0365154A2/de
Publication of EP0365154A3 publication Critical patent/EP0365154A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/18—Mixing in containers to which motion is imparted to effect the mixing
    • B28C5/20—Mixing in containers to which motion is imparted to effect the mixing rotating about a horizontal or substantially horizontal axis during mixing, e.g. without independent stirrers
    • B28C5/2045—Parts or components
    • B28C5/2054—Drums, e.g. provided with non-rotary mixing blades

Definitions

  • mixing apparatus which comprises a drum which is rotated about its axis in order to mix the materials inside the drum, such as a cement mixer
  • a drum which is rotated about its axis in order to mix the materials inside the drum
  • a drum has a closed end at one end of the axis and an open end at the other for loading and unloading of the materials.
  • the open end normally has an aperture which is smaller than the maximum diameter of the drum.
  • a mixing device comprising a drum rotatable about an axis, the drum being formed generally cylindrical in shape, the drum having an open en and a closed end, the drum at the closed end being cylindrical and being provided with mixing ribs on its internal surface, the mixing ribs extending continuously between she curved side wall of the drum and the plane end wall of the drum.
  • the ribs at their ends remote from the plane end wall may have an end wall which is not radial of the the drum.
  • the drum may comprise further ribs onits internal cylindrical surface, the end faces of which ribs are preferably not radial.
  • the drum preferably comprises an axial portion free of ribs at which portion the drum can be supported externally.
  • the drum At its open end the drum preferably tapers inwardly towards the open end.
  • a detachable cover may be provided for the open end.
  • the mixing drum illustrated in the drawings is generally cylindrical, with a closed end section 11, having a circular plane end wall 12 and a cylindrical side wall 13.
  • the drum is formed with internal mixing ribs 21 whose depth increases from zero at the ends 15 remote from the wall 12 to a maximum valve (in this case 4. 5cm) and then continued at that maximum value until the junction with the end wall at which the rib continues in a radial direction (at a depth of 2.5cm) across the end wall 12 to taper to nothing at their ends closest to the axis of the drum.
  • the first mentioned end face 15 of the rib 21 is inclined at about 10° to the radius of the drum.
  • the drum is formed by blow moulding, the ribs 21 being formed as part of the side wall 13 of the drum, with open mouths on its exterior. Longer drums can be formed by using a mould with one or more intermediate sections which are added for lengthening the drum.
  • the external face of the drum is also formed with a V-groove 24 to receiving a drive pulley belt (not shown) for rotating the drum.
  • the groove 24 is located closer to the closed end of the section than to the open end.
  • the drum tapers inwardly to a final plain cylindrical portion 45 at an open end 42 having a radius of approximately half the bore of the main cylinder.
  • the plain cylindrical portion 45 would be used to engage supporting pulleys as an alternative to the portion 35 described above.
  • the open end 42 may be provided with a cover 46 for closing the open end which can be fixed in position by a twist-and-lock mechanism.
  • the frusto-conical section 41 has no internal ribs.
  • the shaft 61 is of steel mounted on a transverse base plate 62.
  • the base plate and the adjacent part of the shaft are covered in plastics material and the shaft assembly is welded to the plastics material of the drum by spinning the shaft assembly about the axis of the drum while bringing the base plate slowly into contact with plane exterior surface of the drum until the heat generated by the friction of contact causes the members to fuse together.
  • the welding step preferably takes place with the axis of the drum vertical so that the welded components can be left in position without danger of falling apart while they cool down.
  • An alternative method of securing the shaft assembly to the drum is by bolting the base plate to the plane end wall of the drum.
  • Bolts are passed through the end wall of the drum from the inside and the bolt heads secured against rotation by injection moulding plastics material around them after which the base plate of the shaft assembly is secured in position by screwing nuts onto the protruding bolt shafts.
  • the ribs 21 stop short of the radius of the base plate 62 so that the latter fixes on to a plain central portion of the end wall 12 (not distorted by ribs).
  • the drum is supported for rotation at the shaft 61 and at the plain exterior portion 35 or 45 which is free of hollow ribs and is driven for rotation by a belt passing around the groove 24 between the shaft 61 and the plain portion 35 or 45.
  • a ball race can support the shaft 61.
  • a set of rollers or pulleys can support the portions 35 and 45.
  • the drum can be rotated by hand if desired, in which case handles can be fitted to the periphery of the drum, preferably by welding to the external slots formed by the ribs 21 (and possibly 33).
  • Rotation of the drum by a motor can be achieved by driving the belt in the groove 24.
  • Water or other fluids can be introduced through a bore (not shown) in the shaft 61.
  • the shaft 61 and rollers bearing on the plain portion 34 provide the support for the drum. Axial movement of the drum can be prevented by a radial shoulder such as a circlip secured to the shaft 61.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP19890309746 1988-09-23 1989-09-25 Mischgerät Withdrawn EP0365154A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8822429 1988-09-23
GB888822429A GB8822429D0 (en) 1988-09-23 1988-09-23 Mixing apparatus

Publications (2)

Publication Number Publication Date
EP0365154A2 true EP0365154A2 (de) 1990-04-25
EP0365154A3 EP0365154A3 (de) 1991-10-02

Family

ID=10644154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890309746 Withdrawn EP0365154A3 (de) 1988-09-23 1989-09-25 Mischgerät

Country Status (2)

Country Link
EP (1) EP0365154A3 (de)
GB (1) GB8822429D0 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5403086A (en) * 1991-04-16 1995-04-04 Scepter Manufacturing Company Limited Mixing device
GB2367505A (en) * 2000-10-04 2002-04-10 Allan Marcham Portable rollable mixing device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521116A (en) * 1984-06-01 1985-06-04 Gordon W. Orthner Mixing apparatus with removable drum liner
GB2198050A (en) * 1986-11-14 1988-06-08 Robert James Bishop Collapsible mixing drum

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521116A (en) * 1984-06-01 1985-06-04 Gordon W. Orthner Mixing apparatus with removable drum liner
GB2198050A (en) * 1986-11-14 1988-06-08 Robert James Bishop Collapsible mixing drum

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5403086A (en) * 1991-04-16 1995-04-04 Scepter Manufacturing Company Limited Mixing device
GB2367505A (en) * 2000-10-04 2002-04-10 Allan Marcham Portable rollable mixing device

Also Published As

Publication number Publication date
GB8822429D0 (en) 1988-10-26
EP0365154A3 (de) 1991-10-02

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