EP0229751A2 - Machine à coffrages glissants pour la fabrication éléments creux en béton - Google Patents

Machine à coffrages glissants pour la fabrication éléments creux en béton Download PDF

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Publication number
EP0229751A2
EP0229751A2 EP87890002A EP87890002A EP0229751A2 EP 0229751 A2 EP0229751 A2 EP 0229751A2 EP 87890002 A EP87890002 A EP 87890002A EP 87890002 A EP87890002 A EP 87890002A EP 0229751 A2 EP0229751 A2 EP 0229751A2
Authority
EP
European Patent Office
Prior art keywords
core
auger
flight
flights
extruder
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
EP87890002A
Other languages
German (de)
English (en)
Other versions
EP0229751B1 (fr
EP0229751A3 (en
Inventor
Aimo Seppänen
Lassi Järvinen
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.)
Lohja Parma Engineering Lpe Te Valkeakoski Fin Oy
Original Assignee
KT-SUUNNITTELU Oy
KT SUUNNITTELU Oy
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 KT-SUUNNITTELU Oy, KT SUUNNITTELU Oy filed Critical KT-SUUNNITTELU Oy
Priority to AT87890002T priority Critical patent/ATE52056T1/de
Publication of EP0229751A2 publication Critical patent/EP0229751A2/fr
Publication of EP0229751A3 publication Critical patent/EP0229751A3/en
Application granted granted Critical
Publication of EP0229751B1 publication Critical patent/EP0229751B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/29—Producing shaped prefabricated articles from the material by profiling or strickling the material in open moulds or on moulding surfaces
    • 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
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels

Definitions

  • the present invention relates to a concrete slab extruder in accordance with the preamble of claim 1.
  • Casting of hollow-core concrete elements with sliding molds, especially hollow-core slabs is based on extruding the concrete mix onto the casting bed by using one or sev­eral core-forming members, e.g. a core-forming mandrel and/or a trowel tube.
  • the concrete mix is compacted by utilizing the pressure generated by the auger flight.
  • a forming member extension is provided immediately next to the auger flight, e.g., a core-forming mandrel, which is vibrated by means of a vibrator mounted inside the mandrel.
  • a vibrator beam atop the cover part of the machine is vibrated, which combines with the vibration of the core-­forming mandrels to effect the final compaction of the concrete.
  • the core-forming mandrel is accompanied with a trowel tube, whose duty is to support the shell walls of the hollow-core slab at the final end of the extruder machinery.
  • the drawbacks of the extruder construction of the hollow-core forming mandrel type include a high noise level, high energy consumption, and a low efficiency of vibration power used for compaction.
  • the present invention aims to overcome the disadvantages found in the prior-art constructions and to present a completely new type of extruder which is especially applicable for the compaction of a soil-wet concrete mix.
  • the invention is based on moving the core-forming mandrel extensions of adjacent auger flights used for concrete extrusion in a synchronized and counterphased reciprocating manner in the axial direction in respect to the auger flights. Then, the annular slot or recess between the final end of the auger flight and the core-forming mandrel alternately becomes wider and narrower, thus mixing the concrete contained in this space.
  • the auger flights in accordance with the invention, and especially their core parts, have an approximately constant diameter, thus deviating from the conventional constructions of conical shape.
  • the difference between the outside diameter of auger flights and the diameter of the auger core is small as compared to the conventional auger construction, which allows a relatively large diameter for the auger core.
  • the auger length is also preferably relatively long.
  • a special feature of the invention proposes a decreasing pitch of flights towards the final end of the auger flight.
  • This decrease of pitch is preferably constant, which makes the pitch progressively smaller towards the final end of the auger. Consequently, the pitch of auger flights is essentially smaller at the final end of the auger than at the initial end of the auger.
  • the compaction is furthermore amplified by the axially reciprocating movement of the auger flights.
  • slipforming extruder in accordance with the invention is characterized by what is stated in the characterizing part of claim 1.
  • the noise level generated by an extruder machine in accordance with the invention is essentially lower than in hollow-core extruders based on vibration compaction with a vibration frequency in the range of 150...250 Hz.
  • the slipforming extruder in accordance with the invention is especially applicable to both the production of prestressed hollow-core slabs of the aforementioned type and production of steel-reinforced hollow-core concrete slabs.
  • the slipforming machine shown in Figure 1 is adapted movable on a casting bed 4.
  • the machine comprises a frame 18, which is supported on wheels 19 and movable on rails 20. With bearings rotatably secured to the frame 18, it has five parallel auger flights 2, 25 with relatively low-profile flights 5. Consequently, a core member 26 of the auger flights 2 has an appreciably large and approximately constant diameter in the axial direction.
  • the flights 5 have a constant pitch over the entire length of the auger 2.
  • Each final end of the augers 2 carries a core-forming mandrel 3 and/or a trowel tube, both mounted axially movable and rotatable in respect to the auger.
  • the drive and power train system 7, 15, 16, 17, which is provided for rotating the auger flights 2, is arranged on the movable frame 18.
  • This drive and power train system comprises an electric motor 17, which drives the auger flights 2, 25 via a chain sprocket 16 and a chain 15 by chain sprockets 7, which are mounted onto shafts 6 of auger flights 2, 25.
  • the concrete poured from a hopper 1 is adapted to flow to the initial end of the auger flights 2.
  • a hollow-core slab 33 to be cast is bordered from below by a bed 4, from the sides by side members which are not shown, and from above by vibrating top beams 21 and 22.
  • a core-forming mandrel 3 forms a void 24.
  • the frame 18 also carries a secondary drive and power train system 8...14. It comprises an electric motor 14 together with a crankshaft assembly 10, which is driven by the motor and is effectual on shafts 6 of the adjacent auger flights 2, 25.
  • the assembly is connected via connection rods 9 to ends of bars 8 passing through hollow shafts 6 of the auger flights 2 so as to make the adjacent core-­forming mandrel 3 and 30 move in a synchronized and counterphased reciprocating manner in the axial direction with respect to the corresponding auger flights 2 and 25 during the operation of the slipforming extruder machine.
  • the frequency of the reciprocating movement of core-forming mandrels 3 and 30 is 0.3...100 Hz, preferably 5...10 Hz.
  • the amplitude of the reciprocating movement (stroke length) is 0.5...50 mm, preferably about 10 mm.
  • the reciprocating movement at the final end of the extrusion phase performs an extremely effective compaction of concrete.
  • the reciprocating movement of core-forming mandrels 3, 30 creates pressure variations in the concrete by achieving internal mixing of concrete by means of an alternately increasing and decreasing annular space 29 between the final end of auger flights 2, 25 and corresponding core-forming mandrels 3, 30. This also forces the concrete aggregates to perform a shearing flow in the direction transverse to the axial flow.
  • the core-forming mandrel 3 gives the void 24 a desired form. If the core-forming mandrel 3 has a cross-section of circular shape or rotates with the auger flight 2, the void 24 will have a cylindrical shape.
  • the core-forming mandrel 3 may also be nonrotational. Then, the bar 8 passing through the hollow shaft 6 of the auger flight 2 moves only the core-forming mandrel 3 in respect to the auger flight 2. In order to implement this axial movement, the intruding portion of the mandrel 3 outer surface is provided with axial splines 27 and the envelope portion inner surface of the final end of the auger flight 2 is provided with corresponding key members 28.
  • core voids different from a cylindrical shape, are also possible.
  • the aforementioned progressively decreasing pitch is exemplified in the upper auger 2 ⁇ of Figure 2.
  • the pitch of a flight 5 ⁇ is decreased in the feed direction so as to achieve at the final end of the auger 2 ⁇ a pitch of 30...70 % , preferably about 50 %, of the pitch at the initial end of the auger 2 ⁇ .
  • the auger 2 has a flight profile 5 with a height of, for instance, 3...10 % of the diameter of the auger 2.
  • the scope of the invention entails constructions different from the exemplified embodiment.
  • the corresponding auger flights 2 may also move simultaneous­ly in a counterphased manner in respect to the mandrels.
  • the relative mutual movement of the auger flights 2 and the core-forming mandrels 3 is implemented.
  • the core-forming mandrels 3 may also be actuated by a rotational movement, e.g. a oscillating rotational movement, which is different from that of the corresponding auger flights 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • External Artificial Organs (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Transmission Devices (AREA)
  • Road Repair (AREA)
  • Lining And Supports For Tunnels (AREA)
EP87890002A 1986-01-17 1987-01-12 Machine à coffrages glissants pour la fabrication éléments creux en béton Expired - Lifetime EP0229751B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87890002T ATE52056T1 (de) 1986-01-17 1987-01-12 Gleitfertiger fuer hohldielen aus beton.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI860235A FI76517C (fi) 1986-01-17 1986-01-17 Glidgjutmaskin foer tillverkning av haolelement av betong.
FI860235 1986-01-17

Publications (3)

Publication Number Publication Date
EP0229751A2 true EP0229751A2 (fr) 1987-07-22
EP0229751A3 EP0229751A3 (en) 1987-11-11
EP0229751B1 EP0229751B1 (fr) 1990-04-18

Family

ID=8521980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87890002A Expired - Lifetime EP0229751B1 (fr) 1986-01-17 1987-01-12 Machine à coffrages glissants pour la fabrication éléments creux en béton

Country Status (6)

Country Link
EP (1) EP0229751B1 (fr)
AT (1) ATE52056T1 (fr)
DE (1) DE3762323D1 (fr)
DK (1) DK22187A (fr)
FI (1) FI76517C (fr)
NO (1) NO870201L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0677362A1 (fr) * 1994-04-07 1995-10-18 Valkeakoski X-Tec Oy Ltd. Procédé et dispositif pour la fabrication d'éléments en béton
GB2324980A (en) * 1997-05-09 1998-11-11 Ultra Span Technologies Inc Low noise formation of hollow core concrete slabs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107520946A (zh) * 2017-10-19 2017-12-29 洛阳市易安环保科技有限公司 一种复合隔墙板成型装置及成型方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0174923A1 (fr) * 1984-09-10 1986-03-19 Lohja Parma Engineering Lpe Oy Machine à extruder des panneaux en béton avec des mandrins mobiles pour la compression par cisaillement
EP0175930A2 (fr) * 1984-08-24 1986-04-02 Lohja Parma Engineering Lpe Oy Procédé et dispositif pour la fabrication de plaques creuses et d'éléments de construction semblables de préférence en béton

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175930A2 (fr) * 1984-08-24 1986-04-02 Lohja Parma Engineering Lpe Oy Procédé et dispositif pour la fabrication de plaques creuses et d'éléments de construction semblables de préférence en béton
EP0174923A1 (fr) * 1984-09-10 1986-03-19 Lohja Parma Engineering Lpe Oy Machine à extruder des panneaux en béton avec des mandrins mobiles pour la compression par cisaillement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0677362A1 (fr) * 1994-04-07 1995-10-18 Valkeakoski X-Tec Oy Ltd. Procédé et dispositif pour la fabrication d'éléments en béton
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

Also Published As

Publication number Publication date
ATE52056T1 (de) 1990-05-15
FI76517B (fi) 1988-07-29
NO870201L (no) 1987-07-20
DK22187A (da) 1987-07-18
FI76517C (fi) 1990-01-26
DE3762323D1 (de) 1990-05-23
FI860235A0 (fi) 1986-01-17
FI860235A (fi) 1987-07-18
NO870201D0 (no) 1987-01-16
EP0229751B1 (fr) 1990-04-18
DK22187D0 (da) 1987-01-16
EP0229751A3 (en) 1987-11-11

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