EP0080333A2 - Strangpressmaschine - Google Patents

Strangpressmaschine Download PDF

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Publication number
EP0080333A2
EP0080333A2 EP82306152A EP82306152A EP0080333A2 EP 0080333 A2 EP0080333 A2 EP 0080333A2 EP 82306152 A EP82306152 A EP 82306152A EP 82306152 A EP82306152 A EP 82306152A EP 0080333 A2 EP0080333 A2 EP 0080333A2
Authority
EP
European Patent Office
Prior art keywords
machine
concrete
forming element
conveyor
mold
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.)
Granted
Application number
EP82306152A
Other languages
English (en)
French (fr)
Other versions
EP0080333B1 (de
EP0080333A3 (en
Inventor
Christopher B. Bunn
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.)
Partek Oy AB
Original Assignee
Dy-Core Systems Ireland Ltd
Dy Core Systems Ireland 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23260109&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0080333(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dy-Core Systems Ireland Ltd, Dy Core Systems Ireland Ltd filed Critical Dy-Core Systems Ireland Ltd
Priority to AT82306152T priority Critical patent/ATE25349T1/de
Publication of EP0080333A2 publication Critical patent/EP0080333A2/de
Publication of EP0080333A3 publication Critical patent/EP0080333A3/en
Application granted granted Critical
Publication of EP0080333B1 publication Critical patent/EP0080333B1/de
Expired legal-status Critical Current

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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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
    • 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
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/084—Producing shaped prefabricated articles from the material by vibrating or jolting the vibrating moulds or cores being moved horizontally for making strands of moulded 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
    • B28B3/224—Twin screw extruders, e.g. double shaft extruders
    • 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
    • B28B3/228—Slipform casting extruder, e.g. self-propelled extruder

Definitions

  • This invention relates to an extrustion machine for making elongated articles of concrete.
  • U.S. Patent 3,159,897 issued December 8th, 1964 to Ellis discloses a machine having a plurality of spiral conveyors or augers each with a flight fixed to a core shaft. Each auger has a trowelling mandrel secured to the downstream end and that mandrel rotates with the auger. A vibrator is mounted on the machine outside the molding area so that the entire machine is vibrated. In the Ellis machine the trowelling unit is fixed to an auger and rotates with it and the machine thus forms concrete slabs in which the cores must be of circular cross section.
  • Canadian Patent 910,030 issued September 19th, 1972 describes an extrusion machine having a forming element of any cross sectional shape.
  • a forming element of any cross section shape independent of and immediately following the downstream end of the spiral conveyor. That forming element is mounted so as not to be rotated by the conveyor. It may be nonrotated or it may be rotated at a speed different from the conveyor or indeed at a speed the same as the conveyor but the feature of the patent is that the spiral conveyor and the forming element can be driven independently.
  • Canadian Patent 1,031,934 issued May 30th, 1978 shows a machine for extruding elongate articles of concrete in which a fixed transverse plate is positioned across the upstream end of the mold and in which the conventional screw conveyor is used to force the concrete towards the mold.
  • the invention of this patent is directed to formation of concrete bodies having cores of different sizes. In this patent the molding elements do not rotate.
  • Canadian Patent 1,100,297 issued May 5th, 1981 shows an extrusion machine of a generally similar type but including a support tube so that reinforcing members may be introduced into the formed article.
  • the patent generally discloses a machine having a molding section with a forming element in it and in which concrete is forced through the mold by a screw conveyor.
  • the above machines generally move along a track on wheels and extrude the formed concrete body on the upper surface of the track. This is possible because the concrete is a relatively stiff mix and, of course, modern technology permits rapid setting of concrete.
  • the present invention seeks to provide a machine in which an optimum cross section of a hollow concrete body can be produced, that is the minimum amount of concrete can be used to produce a body of the required strength.
  • the present invention provides an extrusion machine for making elongated articles of concrete by forcing the concrete through a mold, the article having a relatively large core, the machine being moved forwardly by reaction as the concrete is forced against the molded concrete, comprising a rotatable spiral conveyor in and extending longitudinally of the mold for moving the concrete through the mold, and a non-rotatable forming element for forming the internal cavity which forming element is positioned in the mold immediately following the downstream end of the conveyor, with its lower edge positioned so that not more than 10% of the height of the forming element is below the lower edge of the conveyor, and its longitudinal center line is higher than the center line of the conveyor, the forming element being formed with a ramp extending upwardly from the downstream end of the conveyor, the lower edge and lower sides of the forming element being free of any substantial ramp, and the conveyor forcing the concrete over the forming element to form the concrete article.
  • the forming element should be free of any substantial ramp at its bottom upstream edge and sides. However, a ramp is permissible provided it is short. Its length must not exceed 25% of the length of the forming element.
  • the first element is formed with a vibrator and the subsequent elements are unvibrated. There is thus a damper means between each forming element.
  • FIG 1 illustrates an extrusion machine 10 showing a block 12 extruded from the machine onto a base and track 14.
  • a hopper 16 through which the concrete is fed to the machine 10 and an electric motor 18 to turn the screw conveyors 20 and 22 shown in more detail in Figures 2 and 3.
  • the machine 10 has wheels 24 to move along the upper surface of the track 14.
  • FIG. 2 illustrates the machine in more detail.
  • Rotatable spiral conveyors 20 and 22 extend longitudinally of a mold 26. Concrete is fed through the hopper 16 and the machine 10 moves forward as the conveyors force concrete against the already formed article.
  • An internal cavity is formed in the extruded article.
  • the internal cavity has a depth, defined by its position at formation, greater than its width but this is not essential.
  • the invention in effect, produces articles with relatively large cores compared with the prior art.
  • the cores may be large by extending upwardly or laterally to an extent not possible in prior art machines. This is achieved in the present invention by the provision of forming elements 28, 30 and 32 each having its lower edge in line with a lower edge of the conveyor as illustrated particularly in Figure 2.
  • the forming element lower edge is below the lower edge of the conveyor provided that not more than 10% of the total height of the forming element is below the lower edge of the conveyor.
  • the longitudinal center line A of the elements is higher than the center line B of the conveyor, as particularly illustrated in Figure 4, and a ramp 34 as shown in Figures 2 and 4, extends upwardly from the downstream end of the conveyors 20 and 22 that is adjacent the end of the conveyor, within the mold 26.
  • the machine has, as may be considered conventional, a main frame 36 having side members 38 and cross members 40.
  • a mounting frame 42 mounted on the side members 38 which extends across the machine. This mounting frame 42 can be adjusted up and down by the provision of bolts 44.
  • the main frame 36 is provided with wheels 24 that ride on the rails 14 but it is also necessary to prevent the downstream end of the machine from rising during operation. Wheels 46 engage the undersurface of the sides 38 as shown in Figure 2 to prevent any possible lifting of the machine. Weights added to the downstream end of the machine can be used instead.
  • Each conveyors is made of a flight 50 secured to or formed integrally with a hollow shaft 52.
  • the hollow shaft 52 has a straight section extending part of the length of the conveyor but the section increases outwardly towards the downstream end. However, it may be of uniform cross section.
  • Conveyor 20 is rotated in its bearing 48 by a chain and sprocket arrangement 54 driven by electric motor 18 mounted on frame 42.
  • the second conveyor 22 may be provided with a separate electric motor but is desirably driven by the same electric motor 18 through gears 56 and a chain and sprocket arrangement 58 ensuring that the two conveyors 20 and 22 rotate in opposite directions.
  • the forming elements 28, 30 and 32 are each mounted on a shaft 60 extending through the hollow core shaft 52.
  • the first element 28, with ramp 34 is attached to the end of the internal shaft.
  • the remaining elements 30 and 32 are then bolted successively first to the ramped element 28 by bolts 62 which also engage in dampers 64.
  • the first element 28 is provided with a vibrator 66, driven by electric motor 68 through internal shaft 70.
  • the vibrator which is a simple eccentric, will not be described here further as it is well known in the art.
  • an additional vibrator 72 may be provided on top of the machine as shown in Figure 2. The structure of this vibrator 72 will also not be described as it is conventional.
  • the width of the body 12 to be produced may be controlled by side plates 74 mounted on opposite sides of the mold 26.
  • the side plates 74 are mounted for adjustment on frame members 38 by bolts 76.
  • the depth of the mold 26 can be controlled by an upper plate 78 positioned on top of the molding section and adjustable on bolts 80 in conventional manner.
  • the particular virtue of the present invention is that articles having relatively large cores and, for example, cores that are of substantial depth relative to the depth of the article can be produced. This is made possible by having the center line B of the screw lower than the center line A of the mold, by the provision of the ramp 34 on the top of the first forming element 28 and by the absence of any substantial ramp on the underside of the forming element. It is also desirable that there not be a ramp on the lower corners or sides of the forming element below the longitudinal axis of the screw as shown in Figure 4. However, a small ramp is permitted here provided that it is not of great length or depth and does not exceed 25% of the forming element length.
  • the present invention thus permits the economical production of concrete bodies having the same strength as bodies produced on prior art machines but using less concrete.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Electroluminescent Light Sources (AREA)
  • Luminescent Compositions (AREA)
  • Screw Conveyors (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Reciprocating Pumps (AREA)
  • Rod-Shaped Construction Members (AREA)
EP82306152A 1981-11-20 1982-11-18 Strangpressmaschine Expired EP0080333B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82306152T ATE25349T1 (de) 1981-11-20 1982-11-18 Strangpressmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32364881A 1981-11-20 1981-11-20
US323648 1989-03-15

Publications (3)

Publication Number Publication Date
EP0080333A2 true EP0080333A2 (de) 1983-06-01
EP0080333A3 EP0080333A3 (en) 1984-10-17
EP0080333B1 EP0080333B1 (de) 1987-02-04

Family

ID=23260109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82306152A Expired EP0080333B1 (de) 1981-11-20 1982-11-18 Strangpressmaschine

Country Status (14)

Country Link
EP (1) EP0080333B1 (de)
JP (1) JPS58131020A (de)
KR (1) KR860001642B1 (de)
AT (1) ATE25349T1 (de)
AU (1) AU539819B2 (de)
CA (1) CA1193834A (de)
DE (1) DE3275360D1 (de)
DK (1) DK158073C (de)
EG (1) EG15859A (de)
FI (1) FI71088C (de)
IE (1) IE53675B1 (de)
IN (1) IN157614B (de)
MX (1) MX157583A (de)
NO (1) NO157289C (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4718838A (en) * 1985-04-08 1988-01-12 Building Machines Developing Company Of The Ministry Of Nuclear Energy Industry Autocutting extrusion machine for producing prestressed concrete cored articles
GB2324980A (en) * 1997-05-09 1998-11-11 Ultra Span Technologies Inc Low noise formation of hollow core concrete slabs
EP0968799A1 (de) * 1998-07-01 2000-01-05 Euromac S.r.l. Gleitvorrichtung zum Strangpressen von Stahlbetonfertigteilen
WO2001014114A1 (en) * 1999-08-23 2001-03-01 Valkeakoski X-Tec Oy Ltd Method and apparatus for manufacturing a concrete product and a concrete product series
WO2003103913A1 (en) * 2002-06-07 2003-12-18 Consolis Technology Oy Ab Method and apparatus for casting a hollow-core concrete product
CN103158190A (zh) * 2013-03-28 2013-06-19 南京益生宜居建筑材料科技有限公司 混凝土空心板挤出机的挤出仓内使用的模芯
CN103171030A (zh) * 2013-03-28 2013-06-26 南京益生宜居建筑材料科技有限公司 混凝土空心板连续挤出机
US8506230B2 (en) 2007-11-21 2013-08-13 Outotec Oyj Distributor device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123831A (en) * 1991-05-16 1992-06-23 Esa Enqvist Concrete extrusion machine
CN103171031B (zh) * 2013-03-28 2015-06-24 南京益生宜居建筑材料科技有限公司 混凝土空心板连续生产方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159897A (en) * 1961-07-10 1964-12-08 Fredrick G Ellis Machine for extruding hollow cored concrete sections
CA910030A (en) * 1969-12-04 1972-09-19 Putti George Extrusion machine for making articles of cement-like material
US3926541A (en) * 1970-06-29 1975-12-16 Frederick M Hewitt Extruder with interacting auger and care means
GB1454050A (en) * 1974-02-11 1976-10-27 Spiroll Corp Ltd Pile extruder
US3904341A (en) * 1975-08-29 1975-09-09 Dyform Concrete Prestressed Lt Machine for extruding cement-like material into articles
CA1100297A (en) * 1977-10-28 1981-05-05 Norman W. Bunn Reinforcing member support in concrete extruders
JPS583801B2 (ja) * 1979-09-12 1983-01-22 ダイフオ−ム・エンジニアリング・リミテツド コンクリ−ト押出成形機

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4718838A (en) * 1985-04-08 1988-01-12 Building Machines Developing Company Of The Ministry Of Nuclear Energy Industry Autocutting extrusion machine for producing prestressed concrete cored articles
GB2324980A (en) * 1997-05-09 1998-11-11 Ultra Span Technologies Inc Low noise formation of hollow core concrete slabs
GB2324980B (en) * 1997-05-09 2002-02-20 Ultra Span Technologies Inc Low noise hollow core slab extruder
EP0968799A1 (de) * 1998-07-01 2000-01-05 Euromac S.r.l. Gleitvorrichtung zum Strangpressen von Stahlbetonfertigteilen
WO2001014114A1 (en) * 1999-08-23 2001-03-01 Valkeakoski X-Tec Oy Ltd Method and apparatus for manufacturing a concrete product and a concrete product series
WO2003103913A1 (en) * 2002-06-07 2003-12-18 Consolis Technology Oy Ab Method and apparatus for casting a hollow-core concrete product
US8506230B2 (en) 2007-11-21 2013-08-13 Outotec Oyj Distributor device
CN103158190A (zh) * 2013-03-28 2013-06-19 南京益生宜居建筑材料科技有限公司 混凝土空心板挤出机的挤出仓内使用的模芯
CN103171030A (zh) * 2013-03-28 2013-06-26 南京益生宜居建筑材料科技有限公司 混凝土空心板连续挤出机
CN103171030B (zh) * 2013-03-28 2015-09-09 南京益生宜居建筑材料科技有限公司 混凝土空心板连续挤出机
CN103158190B (zh) * 2013-03-28 2015-09-09 南京益生宜居建筑材料科技有限公司 混凝土空心板挤出机的挤出仓内使用的模芯

Also Published As

Publication number Publication date
NO157289B (no) 1987-11-16
AU539819B2 (en) 1984-10-18
JPS58131020A (ja) 1983-08-04
DK158073B (da) 1990-03-26
IE822664L (en) 1983-05-20
EG15859A (en) 1986-12-30
EP0080333B1 (de) 1987-02-04
FI821813A0 (fi) 1982-05-21
EP0080333A3 (en) 1984-10-17
IN157614B (de) 1986-05-03
NO157289C (no) 1988-02-24
IE53675B1 (en) 1989-01-04
KR860001642B1 (ko) 1986-10-15
AU9071182A (en) 1983-05-26
MX157583A (es) 1988-12-02
DE3275360D1 (en) 1987-03-12
FI71088B (fi) 1986-08-14
ATE25349T1 (de) 1987-02-15
CA1193834A (en) 1985-09-24
DK518082A (da) 1983-05-21
FI71088C (fi) 1990-02-13
FI821813A7 (fi) 1983-05-21
KR840002290A (ko) 1984-06-25
JPS6315122B2 (de) 1988-04-04
DK158073C (da) 1990-08-20
NO823868L (no) 1983-05-24

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