EP0182619A2 - Herstellung von Baublöcken - Google Patents

Herstellung von Baublöcken Download PDF

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Publication number
EP0182619A2
EP0182619A2 EP85308308A EP85308308A EP0182619A2 EP 0182619 A2 EP0182619 A2 EP 0182619A2 EP 85308308 A EP85308308 A EP 85308308A EP 85308308 A EP85308308 A EP 85308308A EP 0182619 A2 EP0182619 A2 EP 0182619A2
Authority
EP
European Patent Office
Prior art keywords
core
mould
mould box
cavity
block
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Withdrawn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
EP85308308A
Other languages
English (en)
French (fr)
Other versions
EP0182619A3 (de
Inventor
Dennis Henry Ogden
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.)
Bip Chemicals Ltd
Original Assignee
Bip Chemicals 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
Priority claimed from GB848429558A external-priority patent/GB8429558D0/en
Priority claimed from GB858504398A external-priority patent/GB8504398D0/en
Priority claimed from GB858504399A external-priority patent/GB8504399D0/en
Application filed by Bip Chemicals Ltd filed Critical Bip Chemicals Ltd
Publication of EP0182619A2 publication Critical patent/EP0182619A2/de
Publication of EP0182619A3 publication Critical patent/EP0182619A3/de
Withdrawn legal-status Critical Current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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
    • B28B7/18—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes the holes passing completely through the article
    • B28B7/183—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes the holes passing completely through the article for building blocks or similar block-shaped objects
    • 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
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
    • B28B7/303—Cores; Mandrels adjustable, collapsible, or expanding specially for making undercut recesses or continuous cavities the inner section of which is superior to the section of either of the mouths
    • 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
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/348—Moulds, cores, or mandrels of special material, e.g. destructible materials of plastic material or rubber
    • 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
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/364—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article of plastic material or rubber

Definitions

  • This invention relates to the manufacture of building blocks and particularly such blocks which contain cavities.
  • Building blocks of this type are conventionally made in an apparatus which includes a mould box and at least one core.
  • the mould box is to mould the outer side walls of the block and typically consists of four sides but no top or bottom. In use the box is placed on a flat surface or on a purpose-built baseplate which then forms the base of the mould. Cavities are formed in the block by the presence of cores.
  • the cores used to mould cavities in the block are attached rigidly to the mould box by means of spacer bars.
  • To make a block a predetermined amount of damp particulate concrete mix is poured into the mould defined by mould box, flat surface and core a stripper plate is brought down onto the mix to function also as a top plate, and then the assembly is vibrated to consolidate the mix.
  • the whole assembly is normally vibrated but if there is no baseplate, only the mould box is vibrated.
  • the mould box and core are then lifted vertically away from the consolidated mix forming an uncured block which is subsequently cured.
  • the core may have a slight taper.
  • a resilient core in the moulding apparatus gives advantages which lead to improved block production.
  • Such a core may further be adapted to produce blocks having cavities with undercut portions.
  • an apparatus for moulding a building block of the type comprising a mould box having sides but no base or top and at least one core rigidly attached thereto by means of a spacer bar, the core being to produce a cavity in the moulded block, wherein at least a portion of the moulding surfaces of the core and/or the mould box is formed from an rubbery polymer, such as a rubbery polyurethane.
  • the rubbery polymer may be incorporated into the apparatus as inserts or coatings on the surface of the mould box and/or the core but preferably the core is itself a resilient core which consists essentially of the rubbery polymer.
  • the resilient core may for example be a hollow, shaped core made of a rubbery polymer, such as a rubbery polyurethane.
  • the natural resilience of the material is beneficial, when a block is being moulded, in promoting compaction of the mix in the mould as the apparatus is vibrated in the usual manner.
  • Particularly suitable rubbery polymers are polyurethanes but other rubbery polymers may be used.
  • the preferred rubbers have the following range of properties:-
  • the apparatus may also be adapted to enable a block to be manufactured wherein a recess is provided in the walls of the cavity which, when the cavity is filled with insulating foam, will assist in preventing dislodgement of the foam.
  • the apparatus comprises a core to generate the cavity, said core including a resilient portion which when expanded will form a recess in a wall of said cavity and when retracted will permit removal of the core from the cavity with the block in a green state.
  • the resilient portion of the core may for example be a portion, such as an end portion, made of a rubbery abrasion resistant polymer, such as a rubbery polyurethane, which in its expanded position includes a portion which extends laterally outwardly from the core to form the necessary recess.
  • a rubbery abrasion resistant polymer such as a rubbery polyurethane
  • a positive expansion and retraction of the resilient portion may be achieved if desired by using a hollow cross section core and a movable core spreader or bladder-like construction which can be expanded by application of fluid pressure and contracted either by virtue of natural resilience on removal of such pressure, or by evacuation.
  • the mould box may have, on that edge which is to abut against a flat surface onto which a block is to be moulded, a cushion of rubbery polymer.
  • the cushion of rubbery polymer reduces the noise generated during vibration of the apparatus during moulding of a block.
  • the cushion is at least 3mm thick and it is particularly preferred that the cushion is 5 to 10mm thick.
  • a block mould consists of a mould box 1, transfer plate 2, cores 3 mounted on a spacer bar 4 and a pair of stripper plates 5.
  • the mould box 1 and cores 3 are placed on the transfer plate 2, thus defining with the transfer plate an open-topped mould cavity.
  • a metered amount of damp concrete mix is poured into the cavity, the top is closed by means of the stripper plates and the whole assembly is vibrated to ensure proper compaction of the mix to form a moulded block of correct dimensions.
  • the mould box and cores can now be removed to leave the moulded block 6 on the transfer plate.
  • the stripper plates 5 are used to hold down the moulded block on the transfer plate whilst the mould box and cores are lifted off the moulded block 6, leaving the latter on the transfer plate 3 on which it is removed for curing.
  • the time taken from the filling of the mould cavity to removal of the mould box and cores is in the range 1 to 60 seconds, for example 3 to 20 seconds. It will thus be appreciated that the concrete mix can not be sloppy since there is no appreciable cure taking place before the mould box is removed and the uncured block must then be free-standing.
  • the diagram illustrates in cross-section a mould box 1 and core 3 in position to be lowered on to a transfer plate 2 to form a cavity ready for concrete mix to be poured in.
  • the cores 3 are of conventional external shape, optionally tapered to facilitate their removal from inside a moulded block but they each are made from a rubbery polyurethane polymer which is highly abrasion resistant.
  • Each core 3 is a hollow shape', which has been formed on the spacer bar 4.
  • the mould box 1 is provided with a cushion 7 on its lower edge and a coating 8 of the same polymer on its interior walls.
  • the rubbery polyurethane from which the cores are made may for example be derived from a polyether polyol of 1000 mol.wt, such as Terathane 1000 commercially available from Du Pont, and methylene diphenyl isocyanate (MDI).
  • a polyether polyol of 1000 mol.wt such as Terathane 1000 commercially available from Du Pont
  • MDI methylene diphenyl isocyanate
  • the cores may be cast onto the spacer bar in moulds at 90°C to 100°C using a mixture of 918 parts by wt of the polyol and 282 parts of MDI.
  • the coating 8 of polymer on the walls of the mould box also reduces noise and improves the life of the mould box.
  • the preferred polymer for cushion, coating and core is a rubbery polyurethane; for example one made from a polyether polyol of mol.wt 1000 such as Terathane 1000 (commercially available from Du Pont) and methylene diphenyl isocyanate (MDI).
  • the coating 8 may be cast onto the metal walls of the mould box at 90°C to 100°C using a mixture of 918 parts by weight of the polyol and 282 parts of MDI.
  • the cores are modified to facilitate their expansion inside the mould box and enable a block to be moulded with a cavity which is better adapted subsequently to retain a foam filling.
  • diagram A illustrates a mould box 1 and conventional core 9 in position on a transfer plate 2 forming a cavity ready for concrete to be poured in.
  • Diagram B illustrates a modified core 10 which is made of a flexible material such as a rubbery polyurethane, and which is provided with a core spreader 11 of a rigid material such as steel.
  • the core spreader is first to come into contact with the transfer plate.
  • the core spreader 11 slides up into the hollow interior of the core 7 and is maintained in alignment within it by engagement of a guide rod 12 in a hole in an internal web 13 in the core 10.
  • the effect of the core spreader is to force apart the lower portions of the core 10 so that when in position in the mould box the widened core defines an undercut in the mould cavity shape.
  • FIG 4 the cores are of a similar kind to those of figure 3 but have an alternative spreader mechanism.
  • Figure 4 also illustrates use of an apparatus with no baseplate.
  • diagram A shows a mould box 1 and a core 16 mounted on a spacer bar 4.
  • the mould box is suspended above a flat base 15 which could be, for example, a smooth concrete floor.
  • the core 16 is a hollow moulding of rubbery polymer having the conventional, slightly tapered, external shape but ledges 17 are moulded into its internal walls adjacent to the bottom of the core.
  • the spreader mechanism is very simple and consists only of a thick section 18 of a stiff rubbery polymer (which could be the same material as the core 16) which is V-shaped in cross-section with the apex of the "V" extending below the bottom of the core and the ends of the arms of the "V” being adhered to the ledges 17 on the inner side of the walls of the core.
  • the mould box and core assembly When in use the mould box and core assembly is lowered on to a flat surface the apex of the "V" shaped sheet 18 contacts the surface first then as the core 16 is lowered further the effect is to flatten the "V", and thus force outwardly the lower portions of the sides of the core.
  • the sheet 18 functions as a simple hinge and could be replaced by a metal hinged spreader to perform the same function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP85308308A 1984-11-22 1985-11-14 Herstellung von Baublöcken Withdrawn EP0182619A3 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB848429558A GB8429558D0 (en) 1984-11-22 1984-11-22 Building blocks
GB8429558 1984-11-22
GB8504398 1985-02-20
GB8504399 1985-02-20
GB858504398A GB8504398D0 (en) 1985-02-20 1985-02-20 Building blocks
GB858504399A GB8504399D0 (en) 1985-02-20 1985-02-20 Building blocks

Publications (2)

Publication Number Publication Date
EP0182619A2 true EP0182619A2 (de) 1986-05-28
EP0182619A3 EP0182619A3 (de) 1988-07-20

Family

ID=27262525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85308308A Withdrawn EP0182619A3 (de) 1984-11-22 1985-11-14 Herstellung von Baublöcken

Country Status (2)

Country Link
EP (1) EP0182619A3 (de)
GB (1) GB2174034B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022648A1 (en) * 1993-03-31 1994-10-13 Perval Pty. Ltd. Settable material mould
GB2283198A (en) * 1993-03-31 1995-05-03 Perval Pty Ltd Settable material mould
CN1035933C (zh) * 1994-08-30 1997-09-24 国家建材局苏州混凝土水泥制品研究院 一种混凝土制品用模具
WO2001030552A1 (de) * 1999-10-28 2001-05-03 Detlef Wowro Form zum formen von steinen oder platten
WO2007101869A2 (de) * 2006-03-08 2007-09-13 Kobra Formen Gmbh Vorrichtung zur herstellung von betonformkörpern
DE102008000459A1 (de) 2007-03-03 2008-09-11 Kobra Formen Gmbh Form zur Herstellung von Betonformsteinen und Formkern für eine solche Form und ein Verfahren zur Herstellung eines Formkerns
US7813785B2 (en) 2003-07-01 2010-10-12 General Electric Company Cardiac imaging system and method for planning minimally invasive direct coronary artery bypass surgery

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004005045B4 (de) * 2003-02-19 2014-03-20 Rampf Formen Gmbh Kernelement
CN104400888B (zh) * 2014-10-24 2016-07-06 段炼山 砌块模具及利用其压制成型砌块的方法
CN104325546B (zh) * 2014-10-24 2016-06-08 段炼山 砌块模具及利用其压制成型砌块的方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE387678A (de) *
US1584595A (en) * 1925-11-18 1926-05-11 Bader Kurt Mold for making concrete blocks
FR809116A (fr) * 1935-10-07 1937-02-24 Procédé et dispositif de moulage d'objets creux
DE1074849B (de) * 1960-02-04 ALWEG-Forschung Gesellschaft mit beschränkter Haftung, Köln Dichtungsleiste für Ecken bildende, zerlegbare Betondauerschalungen
DE1238829B (de) * 1960-09-01 1967-04-13 Eugen Wiest Dipl Ing Vorrichtung zum Pressen von Hohlbausteinen in einer Form mittels im Querschnitt dehnbarer Kerne
DE2444715A1 (de) * 1973-09-21 1975-04-03 Kyokuto Mcgregor K K Kernstueck

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB366544A (en) * 1929-09-04 1932-02-03 Eugene Freyssinet Process and apparatus for the manufacture of moulded articles from mortar or concrete
GB469161A (en) * 1935-10-07 1937-07-20 Emile Gustave Louis Girard Improvements in the manufacture of moulded articles with the aid of cores
GB486452A (en) * 1936-12-08 1938-06-03 Arthur Ernest Ruegg Improvements in and relating to the manufacture of concrete building blocks and units
GB503603A (en) * 1937-09-06 1939-04-06 Arthur Ernest Ruegg Improvements relating to the moulding of concrete
GB612707A (en) * 1947-05-14 1948-11-17 Carl Wilhelm Hartmann Improvements in or relating to the manufacture of moulded blocks and the like
GB757553A (en) * 1954-04-15 1956-09-19 Viggo Moth Lonblad Improvements in or relating to cores for forming apertures in moulded bodies
GB866164A (en) * 1957-04-01 1961-04-26 Alexander Feldmann Method and means of forming cavities in cast materials such as concrete
GB882464A (en) * 1957-05-29 1961-11-15 Alweg Forschung Gmbh A sealing strip for a precast concrete permanent mould
GB918426A (en) * 1959-05-23 1963-02-13 Alexander Feldmann Improvements relating to a method and means for forming anchoring cavities in cast materials
GB1248661A (en) * 1969-03-13 1971-10-06 Elastomer Engineering Ltd Moulds employed in casting cement or cementitious material and components and accessories thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE387678A (de) *
DE1074849B (de) * 1960-02-04 ALWEG-Forschung Gesellschaft mit beschränkter Haftung, Köln Dichtungsleiste für Ecken bildende, zerlegbare Betondauerschalungen
US1584595A (en) * 1925-11-18 1926-05-11 Bader Kurt Mold for making concrete blocks
FR809116A (fr) * 1935-10-07 1937-02-24 Procédé et dispositif de moulage d'objets creux
DE1238829B (de) * 1960-09-01 1967-04-13 Eugen Wiest Dipl Ing Vorrichtung zum Pressen von Hohlbausteinen in einer Form mittels im Querschnitt dehnbarer Kerne
DE2444715A1 (de) * 1973-09-21 1975-04-03 Kyokuto Mcgregor K K Kernstueck

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022648A1 (en) * 1993-03-31 1994-10-13 Perval Pty. Ltd. Settable material mould
GB2283198A (en) * 1993-03-31 1995-05-03 Perval Pty Ltd Settable material mould
GB2283198B (en) * 1993-03-31 1997-04-09 Perval Pty Ltd Settable material mould
CN1035933C (zh) * 1994-08-30 1997-09-24 国家建材局苏州混凝土水泥制品研究院 一种混凝土制品用模具
WO2001030552A1 (de) * 1999-10-28 2001-05-03 Detlef Wowro Form zum formen von steinen oder platten
US7813785B2 (en) 2003-07-01 2010-10-12 General Electric Company Cardiac imaging system and method for planning minimally invasive direct coronary artery bypass surgery
WO2007101869A2 (de) * 2006-03-08 2007-09-13 Kobra Formen Gmbh Vorrichtung zur herstellung von betonformkörpern
WO2007101869A3 (de) * 2006-03-08 2007-11-15 Kobra Formen Gmbh Vorrichtung zur herstellung von betonformkörpern
DE102008000459A1 (de) 2007-03-03 2008-09-11 Kobra Formen Gmbh Form zur Herstellung von Betonformsteinen und Formkern für eine solche Form und ein Verfahren zur Herstellung eines Formkerns
EP1967341A3 (de) * 2007-03-03 2011-04-27 KOBRA Formen GmbH Form zur Herstellung von Betonformsteinen und Verfahren zur Herstellung einer Formkernanordnung einer solchen Form
EP1967340A3 (de) * 2007-03-03 2011-04-27 KOBRA Formen GmbH Form zur Herstellung von Betonformkörpern

Also Published As

Publication number Publication date
GB2174034A (en) 1986-10-29
GB8528414D0 (en) 1985-12-24
EP0182619A3 (de) 1988-07-20
GB2174034B (en) 1988-11-16

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