US3580551A - Concrete and the like mixer - Google Patents

Concrete and the like mixer Download PDF

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Publication number
US3580551A
US3580551A US850112A US3580551DA US3580551A US 3580551 A US3580551 A US 3580551A US 850112 A US850112 A US 850112A US 3580551D A US3580551D A US 3580551DA US 3580551 A US3580551 A US 3580551A
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US
United States
Prior art keywords
premixer
mixer
sidewall
bottom wall
container
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
US850112A
Other languages
English (en)
Inventor
Heinz Hammann
Werner Dick
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.)
LICO AG
Original Assignee
LICO AG
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
Priority claimed from DE19686752714 external-priority patent/DE6752714U/de
Priority claimed from DE19686805948 external-priority patent/DE6805948U/de
Application filed by LICO AG filed Critical LICO AG
Application granted granted Critical
Publication of US3580551A publication Critical patent/US3580551A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B28C5/0875—Mixing in separate stages involving different containers for each stage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/45—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor
    • B01F35/453—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor by moving them perpendicular to the plane of the opening
    • 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
    • B28C5/26—Mixing in containers to which motion is imparted to effect the mixing rotating about a vertical or steeply inclined axis during the mixing, e.g. comprising a flat bottomplate rotating about a vertical axis, co-operating with blades or stirrers
    • B28C5/28—Mixing in containers to which motion is imparted to effect the mixing rotating about a vertical or steeply inclined axis during the mixing, e.g. comprising a flat bottomplate rotating about a vertical axis, co-operating with blades or stirrers without independent stirrers

Definitions

  • a concrete or the like mixer comprises an opentopped main mixing container and a premixer disposed above the main mixing container and having a circular bottom wall rotated about a vertical axis and normally frictionally engaging the lower part of a cylindrical sidewall forming a premixing container together with said bottom wall.
  • the bottom and sidewalls of the premixer are temporarily disengaged, to provide a peripheral annular discharge passage.
  • the present invention relates to concrete and the like mixing machines, more particularly to mixers of the type comprising a relatively flat and preferably cylindrical main mixing trough or container housing the mixing tools or devices.
  • a major problem in the design and operation of mixers of the foregoing type is the time required for the carrying out of a concrete or the like mixing operation. This time factor is determined primarily by the construction and effectiveness of the mixing tools within the mixing container, on the one hand, and the time required for the removal or discharge of the mixed aggregates or materials, on the other hand.
  • a possibility to expedite the mixing operations consists in the separate premixing of the aggregates in a premixer disposed exteriorly of the main mixing machine and in subsequently introducing the sufficiently premixed materials into the main mixer for completion of the mixing operation.
  • Such premixing may be effected simultaneously with the measuring, as to weight or volume, of the aggregates before, during, or after transit to the main mixing site.
  • An important object of the present invention is the provision of an integrated premixing and main mixing machine, to enable the premixing of the aggregates or raw materials to be effected efficiently and expeditiously prior to their introduction into the main .mixing machine.
  • Another object of the invention is the provision of a structurally combined premixer and main mixing machine of the referred to type which is both simple in design as well as expeditious and reliable in operation, and which will enable a substantially instant transfer of the premixed materials or aggregates from the premixer to the main mixing machine.
  • FIG. 1 is a schematic side view, shown partly in section, of a concrete and the like mixer embodying the principles of the invention
  • FIG. 2 is a view similar to FIG. 1, showing a modification of the invention.
  • FIG. 3 is a plan view of FIG. 2 shown with the feeding devices of the latter omitted.
  • the invention involves generally the provision of a mixing machine of the referred to type comprising essentially an open-topped main mixing trough or container immediately above which is disposed a premixer in the form of an open-topped cylindrical container having a sidewall and a rotating bottom wall driven by a suitable power source about its vertical axis.
  • a suitable power source about its vertical axis.
  • the lower edge of said sidewall being suitably peripherally supported for free rotation coaxially with said bottom wall, normally frictionally engages said bottom wall, to form therewith a rotating premixing container, suitable feeding means being provided to charge the same with the aggregates or materials to be mixed.
  • the bottom wall of the premixer is slightly lifted by the aid of a hydraulic or the like actuator, for which purpose its drive shaft may be constructed in a known manner of two parts connected for rotation with each other but relatively shiftable in the axial direction.
  • the cylindrical sidewall of the premixer being preferably freely rotatively supported by a flange of the preferably also cylindrical main mixing container, is temporarily lowered by the provision of suitable extensible and retractable supporting means, as described in greater detail below.
  • a main mixing trough or container 1 of a concrete or the like mixing machine according to the invention, said trough, in the example shown, having the form of a flat and open-topped cylinder and serving to house the mixing tools or devices (not shown) which may be of conventional construction.
  • a weighing scale and feeder 2 Disposed above the container 1, in the example shown, are a weighing scale and feeder 2 and the upper end 3 of a feed elevator 4 carrying a hopper 5, for the feeding of the components or aggregates to be mixed in the desired proportions.
  • a feed elevator 4 carrying a hopper 5, for the feeding of the components or aggregates to be mixed in the desired proportions.
  • any other known feeding means for the supply of the raw materials to the mixer in the desired proportions may be provided for the carrying into effect of the invention.
  • an open-topped premixing container 6 consisting essentially of a circular bottom wall 7, preferably in the form of a flat cone as shown, and a cylindrical sidewall 9 coaxial with the cone 7 and main mixing container l.
  • the bottom wall 7 is supported, in the example shown, for rotation about its axis by a suitable power source (not shown) on the one hand, as well as for axial displacement in the upward direction, as indicated in dashed lines in the figure. Displacement may be by the aid of a hydraulic or the like actuator 8.
  • item 8 may include the power source or driving motor, in which case axial displacement of the bottom 7 may be effected in a known manner by connection of the motor with the bottom wall 7 through a pair of axially slidable shafts locked against rotation relative to one another.
  • the sidewall 9 being suitably peripherally supported for free rotation about its axis, has its lower end arranged for frictional coupling engagement with the edge portion of the cone 7, to form a closed premixing chamber or container 6, as shown by full lines in FIG. I.
  • the container 6 will be rotated by the driving source via the bottom wall 7 for the premixing of the aggregates or materials supplied by the feeding devices 2 and 5.
  • the sidewall 9 is peripherally freely rotatively supported, via rollers 10, by a flange or rail 11 extending outwardly from the upper edge of the main mixing container 1, as shown in the example illustrated.
  • the lower edge portion of the cylinder is advantageously angularly bent in the inward direction, to provide an inclined annular peripheral skirt 12 being engaged by the edge of the cone 7 in its lowered (full-line) position, in such a manner as to result in an effective friction coupling of the parts.
  • the bottom wall 7 being rotated by suitable driving means carries with it the sidewall 9 by friction in the manner described, whereby to result in rotation of the premixer and uniform mixing and distribution of the aggregates over the entire circumference of the bottom 7.
  • the aggregates After the aggregates have been sufficiently premixed in this manner, they are transferred to the main mixing container 1 of the machine simply by lifting the cone or bottom wall 7 from the full-line to the dashed-line position shown in the drawing. As a consequence, there is formed thereby an annular peripheral discharge passage between the bottom wall 1 and the skirt 12 of the sidewall 9, resulting in the automatic discharge of the premixed aggregates or materials to the main mixing container 1 approximately to points or areas near the center of the radius of said container where they will be most effectively subjected to the action of the mixing tools. Due to this premixing of the aggregates and their uniform distribution over the circumference of the mixing container, a considerable saving results of the work to be expended by the main mixing devices. This in turn greatly reduces the allover mixing time. i
  • the bottom wall 7 of the premixer being rotated about its axis by means of suitable driving means (not shown), remains at a fixed height, while the sidewall 9, being supported to rotate freely and driven by friction coupling with the wall 7, is temporarily lowered, as indicated by dashed lines in the drawing, to provide a peripheral annular discharge passage for the premixed aggregates, in substantially the same manner as in the embodiment according to FIG. ll.
  • actuators or extenders M interposed between the rail or flange ll of the main mixing container ll, on the one hand, and a flange or guide extending from the upper edge of the wall 9 of the cylinder 9, on the other hand.
  • the actuators may consist of hydraulic cylinders extending upwardly from the flange Ill and containing pistons having piston rods the upper ends of which carry balls or rollers slidably supporting the suitably shaped guide flange disposed at the upper edge of the wall 9.
  • An advantage of the latter embodiment is due to the fact that the wall 9 of the premixing container 6 may be readily and instantly lowered for the discharge of the contents of the premixing container, while the bottom wall 7 continues to rotate, whereby to expedite the discharge of the materials into the main mixing container through the entire annular passage between the parts, in substantially the same manner as in the case of the FIG. 1 embodiment.
  • the premixer may be charged and/or operated during operation of the main mixing machine, whereby to result in a further substantial reduction of the total mixing time, in a manner readily understood.
  • the feeding of the raw materials to be mixed to the premixer is immaterial as far as the function and operation of the present invention is concerned.
  • the raw materials are advantageously supplied by the weighing scale 2, while the admixtures are supplied by a feeding hopper or the like feeding device.
  • the components by being applied to the rotating bottom wall 7, are intimately mixed and distributed before being transferred to the main mixing container of the machine.
  • a concrete and the like mixer comprising in combination:
  • a main mixer including an open-topped main mixing container, and 2. a premixer disposed above said mam mixer and comprised of a. a circular bottom wall supported for rotation about a vertical axis,
  • d. means to temporarily disengage said bottom and sidewalls, to provide a peripheral annular passage for the discharge of the contents of said premixing container into said main mixing container.
  • a mixer as claimed in claim I wherein said sidewall has an inturned lower portion engaged by the edge of said bottom wall in the normal position and acting as a discharge chute for the contents of said premixer in the discharge position thereof.
  • a mixer as claimed in claim 3, wherein said last means is comprised of means to temporarily raise the bottom wall of said premixer.
  • a mixer as claimed in claim 3, wherein said last means is comprised of means to temporarily lower the sidewall of said premixer.
  • a mixer as claimed in claim I wherein said sidewall of said premixer has an inturned lower portion engaged by the edge of said bottom wall in the normal position and acting as a discharge chute for the contents of the premixer in the discharge position thereof, said main mixing container is of cylindrical shape concentric with said premixer and having an upper flange, and said sidewall of said premixer is freely rotatively peripherally and axially displaceably supported by said flange.
  • a mixer as claimed in claim 9, wherein the last-mentioned support comprises a plurality of compressed fluid-controlled cylinders evenly distributed over and extending from said flange, said cylinders having pistons and piston rods with the upper ends of said rods slidably engaging a circular guide of said sidewall.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
US850112A 1968-08-21 1969-08-14 Concrete and the like mixer Expired - Lifetime US3580551A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19686752714 DE6752714U (de) 1968-08-21 1968-08-21 Vormischbehaelter fuer mischmaschinen
DE19686805948 DE6805948U (de) 1968-11-08 1968-11-08 Vormischbehaelter fuer mischmaschinen

Publications (1)

Publication Number Publication Date
US3580551A true US3580551A (en) 1971-05-25

Family

ID=25946036

Family Applications (1)

Application Number Title Priority Date Filing Date
US850112A Expired - Lifetime US3580551A (en) 1968-08-21 1969-08-14 Concrete and the like mixer

Country Status (4)

Country Link
US (1) US3580551A (enrdf_load_stackoverflow)
CH (1) CH497959A (enrdf_load_stackoverflow)
ES (1) ES370652A1 (enrdf_load_stackoverflow)
GB (1) GB1229518A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863904A (en) * 1972-01-18 1975-02-04 Design Link Mixing of fragile granular materials
US4339202A (en) * 1980-04-21 1982-07-13 Uip Engineered Products Corporation Asphalt weigh and mix apparatus and process
US4403863A (en) * 1980-07-12 1983-09-13 Pacific Metals, Co., Ltd. Method for preparing concrete by use of multi-layer pan type mixer
CN109262844A (zh) * 2018-04-30 2019-01-25 中山市道格装饰设计工程有限公司 一种灌浆机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115253891A (zh) * 2022-08-18 2022-11-01 万林琳 一种基于水泥助磨材料生产设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1447125A (en) * 1920-02-16 1923-02-27 William E Dunn Concrete mixer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1447125A (en) * 1920-02-16 1923-02-27 William E Dunn Concrete mixer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863904A (en) * 1972-01-18 1975-02-04 Design Link Mixing of fragile granular materials
US4339202A (en) * 1980-04-21 1982-07-13 Uip Engineered Products Corporation Asphalt weigh and mix apparatus and process
US4403863A (en) * 1980-07-12 1983-09-13 Pacific Metals, Co., Ltd. Method for preparing concrete by use of multi-layer pan type mixer
CN109262844A (zh) * 2018-04-30 2019-01-25 中山市道格装饰设计工程有限公司 一种灌浆机

Also Published As

Publication number Publication date
GB1229518A (enrdf_load_stackoverflow) 1971-04-21
CH497959A (de) 1970-10-31
ES370652A1 (es) 1971-04-16

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