US3864066A - Apparatus for spreading comminuted partly cementitious material on a moving support - Google Patents

Apparatus for spreading comminuted partly cementitious material on a moving support Download PDF

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Publication number
US3864066A
US3864066A US369734A US36973473A US3864066A US 3864066 A US3864066 A US 3864066A US 369734 A US369734 A US 369734A US 36973473 A US36973473 A US 36973473A US 3864066 A US3864066 A US 3864066A
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United States
Prior art keywords
rollers
conveyor
cementitious material
comminuted
descending
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Expired - Lifetime
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US369734A
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English (en)
Inventor
Klaus Gerhardt
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G Siempelkamp GmbH and Co KG
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G Siempelkamp GmbH and Co KG
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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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B28B1/526—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement by delivering the materials on a conveyor of the endless-belt type

Definitions

  • ABSTRACT (30 ⁇ Foreign Application Priority Data A mass of comminuted partly cementitious material
  • My present invention relates to an apparatus for spreading comminuted partly cementitious material, such as a mixture of asbestos fibers and gypsum, on a continuously moving conveyor surface designed to support a pile of such material in a wetted state from which it may harden into a solid layer adapted to be subdivided into boards of asbestos-cement or the like.
  • Such boards may be used, for example, as substrates in making laminated plates of the type described in commonly owned application Ser. No. 143,569 filed May 14, 1971 by H. Kober, now'U.S. Pat. No. 3,753,827.
  • the mixture may also include fine-grained aggregate of the type conventionally used in concrete.
  • Conventional equipment for continuously loading a moving conveyor with such a wetted mixture includes rollers for premixing the fibers and particles of hydraulic binder (e.g., gypsum or cement) and for distributing the result onto the conveyor surface to form a pile which is irrigated by one or more spray nozzles and which is flattened by a leveling roller or a doctor blade; additional spray means may be provided upstream and downstream of the distributor to wet the supporting surface as well as the exiting layer.
  • the conveyor providing the supporting surface subsequently passes through a pressing station in which the comminuted mass is compacted and excess water is expelled, e.g., through perforations in the conveyor which for this purpose may be designed as a wire grid or the like.
  • the object of my present invention is to provide an improved distributor of this nature whose output is more homogeneous, both before and after setting, and which operates with reduced quantities of water.
  • each roller including a cylindrical hub on which a multiplicity of annular fins are axially spaced; the fins of adjacent rollers are interdigitated so as to subdivide the gaps between the hubs into narrow slots.
  • the comminuted partly cementitious material (fibers plus hydraulic binder) is continuously deposited on these rollers by suitable feed means, the rollers being codirectionally rotated so that the interdigitated fins move in opposite directions to retard the descent of the deposited material through the slots defined thereby.
  • the descending flows of this material are irrigated, before reaching the surface of the continuously moving conveyor, by spray means disposed underneath the rollers, preferably in alignment with the roller hubs.
  • the flow paths of these particles are bracketed by upstream and downstream nozzles so inclined as to train respective jets of water upon these flows in the downstream direction whereby the water streams follow the particles as they pile up on the conveyor.
  • the flow rate of the particles through the gaps around the several roller hubs can be regulated by varying the speed of rotation; this rate also depends on the hub spacing, i.e.. on the radial width of the fins (and therefore on the slot length) which should be dimensioned in conformity with the length of the fiber fragments forming part of the mixture.
  • the overall depth of the resulting layer depends, of course, on the number of roller stages used.
  • FIG. 1 is a side-elevational view of a distributing apparatus according to my invention, shown partly in section;
  • FIG. 2 is a fragmentary top view of a roller assembly forming part of the apparatus of FIG. I;
  • FIG. 3 is a side-elevational view of a modified roller assembly.
  • the apparatus shown in the drawing comprises a frame 14 on which, in a manner not further illustrated, the upper run of an endless conveyor belt 2 moves unidirectionally as indicated by an arrow 5.
  • Another endless band 15 led about a deflecting roller 16 which is driven by a nonillustrated motor, coacts with a mixing roller 13 and a dosing roller 17 to feed a partly cementitious mixture 1 of filamentary material (e.g., asbestos fibers), hydraulic binder (e.g., gypsum) and possibly a fine-grained filler to a distributor comprising an array of horizontal rollers 3 with coplanar axes spacedly overlying the conveyor surface.
  • filamentary material e.g., asbestos fibers
  • hydraulic binder e.g., gypsum
  • Each roller 3 includes a hub 10 and a multiplicity of axially spaced annular fins 6 which may be constituted by disks interleaved with sections of the hub, the radius R of each disk exceeding the radius r of the hub by a distance D which is just slightly less than the width of the gap 11 between adjacent hubs 10. Radii r and R are the same for all rollers, as is the axial separation of the disks, yet the disks of adjacent rollers are relatively staggered and interdig itated to subdivide each gap 11 into a multiplicity of narrow slots 18.
  • the rollers 3 are codirectionally rotated, with the aid of drive means symbolized by arrows 7, and jointly define a generally horizontal receiving surface with troughs 8 representing the entrances to the gaps 11.
  • the mixture 1 arriving at the first roller (at the extreme left of FIG. 1) is spread out by the rotating rollers over thisreceiving surface and partly enters the several gaps 11 through which its particles descend in a multiplicity of separate flows 9 to form a pile I on belt 2.
  • Any residue carried onto the periphery of the final roller enters a gap 11' between that roller and an end wall of frame 14 to descend in a flow 9'.
  • the several flow paths or chutes are bounded by vertical baffles 12 and may also contain additional guide means, not shown, directing the descent of the particles.
  • a further nozzle 4 outside frame 14 moistens the upper surface of the outgoing layer while a nozzle 4" spreads its underside from below through the interstices of the wire grid or the like constituting the belt 2.
  • the binder particles and the fibers making up the mixture 1 need not be blended in advance but may be separately supplied to the throat of the feeding station represented by rollers 16 and 17.
  • the distributor may include two sets of rollers 3, 3 rotating in opposite directions (arrows 7 and 7"), with the mixture 1 centrally supplied thereto via a hopper 19.
  • the mixture could also be spread directly over the entire receiving surface of the array by a feeder discharging the'mixture in a broad stream.
  • An apparatus for converting a mass of comminuted partly cementitious material into a moistened continuous layer comprising:
  • each roller in- .cluding a cylindrical hub and a multiplicity of axially spaced annular fins on said hub; the fins of adjacent rollers being interdigitated with formation of narrow slots in the gaps between the hubs thereof; drive means for codirectionally rotating said rollers and simultaneously moving said conveyor; feed means for continuously depositing comminuted cementitious material on said rollers for distribution into a plurality of flows descending in a free fall through said gaps to said supporting surface;
  • said spray means includes a row of nozzles respectively aligned with the hubs of said rollers, each of said flows descending between an upstream nozzle and a downstream nozzle.
  • said flow-guiding means comprises a set of substantially vertical baffles terminating with substantial clearance above said supporting surface, said nozzles being disposed between pairs of said baffles.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
US369734A 1972-06-15 1973-06-13 Apparatus for spreading comminuted partly cementitious material on a moving support Expired - Lifetime US3864066A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2229147A DE2229147C3 (de) 1972-06-15 1972-06-15 Vorrichtung zum Aufstreuen auf ein als Siebband ausgebildetes Formband und zum Benetzen einer Mischung aus Gips oder einem hydraulischen Bindemittel und Faserstoffen im Zuge der Herstellung von faserbewehrten Platten

Publications (1)

Publication Number Publication Date
US3864066A true US3864066A (en) 1975-02-04

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US369734A Expired - Lifetime US3864066A (en) 1972-06-15 1973-06-13 Apparatus for spreading comminuted partly cementitious material on a moving support

Country Status (5)

Country Link
US (1) US3864066A (enrdf_load_stackoverflow)
JP (1) JPS4955909A (enrdf_load_stackoverflow)
DE (1) DE2229147C3 (enrdf_load_stackoverflow)
FR (1) FR2190045A5 (enrdf_load_stackoverflow)
GB (1) GB1392140A (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999650A (en) * 1974-06-08 1976-12-28 G. Siempelkamp & Co. Apparatus for spreading comminuted material on a transport band
US4005962A (en) * 1974-12-04 1977-02-01 Kobee Frank R Extruder for plastic materials
US4063858A (en) * 1975-08-08 1977-12-20 G. Siempelkamp & Co. Layer-forming apparatus, especially for the preparation of particle-board mats
US4068991A (en) * 1975-08-08 1978-01-17 G. Siempelkamp & Co. Layer-forming apparatus especially for particle board mats
US4157236A (en) * 1977-02-28 1979-06-05 Beloit Corporation Electrostatic dry former
US4380285A (en) * 1980-05-16 1983-04-19 Carl Schenck A.G. Apparatus for aligning chips during the manufacture of chipboards
US4388055A (en) * 1980-06-18 1983-06-14 G. Siempelkamp Gmbh & Co. Mat-forming apparatus
US4454940A (en) * 1981-04-18 1984-06-19 G. Siempelkamp Gmbh & Co. Apparatus for forming mats, especially for the production of particleboard
US5386914A (en) * 1990-10-30 1995-02-07 Defibrator Loviisa Oy Apparatus for scattering fibrous material, e.g. chips
US5496570A (en) * 1993-02-02 1996-03-05 Siempelkamp Gmbh & Co. Apparatus for spreading particulate materials
US5887515A (en) * 1996-04-11 1999-03-30 Dieffenbacher Schenck Panel Production Systems Gmbh Method for the continuous production of a mat for the manufacture of boards of wood material or the like
CN112192707A (zh) * 2015-04-14 2021-01-08 可耐福石膏两合公司 用于均匀分布浆料的装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0675856B2 (ja) * 1985-05-25 1994-09-28 松下電工株式会社 セメント系無機質板の製造方法
US5342566A (en) * 1990-08-23 1994-08-30 Carl Schenck Ag Method of manufacturing fiber gypsum board
CA2130508C (en) * 1993-08-20 2005-04-12 Peter Douglas Chase Process for making thin, sealant-coated, fiber-reinforced gypsum panel and panel made thereby
AU2690597A (en) * 1996-03-28 1997-10-22 G. Siempelkamp Gmbh & Co. Plant for sorting and spreading wood chips during the production of chip boards

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1353512A (en) * 1918-12-30 1920-09-21 Baumgartl Leroy Art of manufacturing slabs or the like of cement or like material
US1667292A (en) * 1927-04-09 1928-04-24 Otaka Fabric Company Machine for making elastic paper
US2165718A (en) * 1938-03-05 1939-07-11 Mun Henry Chan Noodle making machine
US2331145A (en) * 1940-01-06 1943-10-05 Owens Corning Fiberglass Corp Method of felting fibrous glass
US2923030A (en) * 1952-12-23 1960-02-02 Allwood Inc Methods and apparatus for producing pressed wood-particle panels
US2926719A (en) * 1953-06-25 1960-03-01 William R Matthews Process and apparatus for molding board in a continuous strip
US2961361A (en) * 1955-05-10 1960-11-22 Fiberglas Canada Ltd Manufacture of reinforcing mats
US3039137A (en) * 1958-02-10 1962-06-19 American Biltrite Rubber Co Apparatus for forming plastic sheets

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1353512A (en) * 1918-12-30 1920-09-21 Baumgartl Leroy Art of manufacturing slabs or the like of cement or like material
US1667292A (en) * 1927-04-09 1928-04-24 Otaka Fabric Company Machine for making elastic paper
US2165718A (en) * 1938-03-05 1939-07-11 Mun Henry Chan Noodle making machine
US2331145A (en) * 1940-01-06 1943-10-05 Owens Corning Fiberglass Corp Method of felting fibrous glass
US2923030A (en) * 1952-12-23 1960-02-02 Allwood Inc Methods and apparatus for producing pressed wood-particle panels
US2926719A (en) * 1953-06-25 1960-03-01 William R Matthews Process and apparatus for molding board in a continuous strip
US2961361A (en) * 1955-05-10 1960-11-22 Fiberglas Canada Ltd Manufacture of reinforcing mats
US3039137A (en) * 1958-02-10 1962-06-19 American Biltrite Rubber Co Apparatus for forming plastic sheets

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999650A (en) * 1974-06-08 1976-12-28 G. Siempelkamp & Co. Apparatus for spreading comminuted material on a transport band
US4005962A (en) * 1974-12-04 1977-02-01 Kobee Frank R Extruder for plastic materials
US4063858A (en) * 1975-08-08 1977-12-20 G. Siempelkamp & Co. Layer-forming apparatus, especially for the preparation of particle-board mats
US4068991A (en) * 1975-08-08 1978-01-17 G. Siempelkamp & Co. Layer-forming apparatus especially for particle board mats
US4157236A (en) * 1977-02-28 1979-06-05 Beloit Corporation Electrostatic dry former
US4380285A (en) * 1980-05-16 1983-04-19 Carl Schenck A.G. Apparatus for aligning chips during the manufacture of chipboards
US4388055A (en) * 1980-06-18 1983-06-14 G. Siempelkamp Gmbh & Co. Mat-forming apparatus
US4454940A (en) * 1981-04-18 1984-06-19 G. Siempelkamp Gmbh & Co. Apparatus for forming mats, especially for the production of particleboard
US5386914A (en) * 1990-10-30 1995-02-07 Defibrator Loviisa Oy Apparatus for scattering fibrous material, e.g. chips
US5496570A (en) * 1993-02-02 1996-03-05 Siempelkamp Gmbh & Co. Apparatus for spreading particulate materials
US5887515A (en) * 1996-04-11 1999-03-30 Dieffenbacher Schenck Panel Production Systems Gmbh Method for the continuous production of a mat for the manufacture of boards of wood material or the like
CN112192707A (zh) * 2015-04-14 2021-01-08 可耐福石膏两合公司 用于均匀分布浆料的装置
EP3854554A1 (en) * 2015-04-14 2021-07-28 Knauf Gips KG A device for the uniform distribution of slurries
AU2020289880B2 (en) * 2015-04-14 2022-04-07 Knauf Gips Kg A device for the uniform distribution of slurries
IL282175B1 (en) * 2015-04-14 2023-05-01 Knauf Gips Kg A device to produce a uniform distribution of a diluted mixture of water and gypsum
IL282175B2 (en) * 2015-04-14 2023-09-01 Knauf Gips Kg A device to produce a uniform distribution of a diluted mixture of water and gypsum

Also Published As

Publication number Publication date
FR2190045A5 (enrdf_load_stackoverflow) 1974-01-25
GB1392140A (en) 1975-04-30
DE2229147A1 (de) 1974-01-03
JPS4955909A (enrdf_load_stackoverflow) 1974-05-30
DE2229147B2 (de) 1975-03-27
DE2229147C3 (de) 1975-11-13

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