US3708148A - Mold for casting cellular concrete bodies - Google Patents

Mold for casting cellular concrete bodies Download PDF

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Publication number
US3708148A
US3708148A US00160282A US3708148DA US3708148A US 3708148 A US3708148 A US 3708148A US 00160282 A US00160282 A US 00160282A US 3708148D A US3708148D A US 3708148DA US 3708148 A US3708148 A US 3708148A
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US
United States
Prior art keywords
mold
framework
heat
bottom member
members
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Expired - Lifetime
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US00160282A
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English (en)
Inventor
R Goransson
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Internationella Siporex AB
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Internationella Siporex AB
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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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
    • B28B1/503—Moulds therefor

Definitions

  • ABSTRACT frameworks at substantially the same temperature as the concrete mass received in the mold.
  • the legs of said table-like structures contacting the support in a manner to prevent distortion of the latter by heat transferred through said legs, and the longitudinal side wall members of the mold being also of a non-warping design.
  • the temperature of the lightweight concrete mass expanding and binding in the casting mold is considerably increased as a result of internal exothermic reactions.
  • the temperature of the mass frequently reaches the magnitude of 80-90 C.
  • This temperature increase is desirable from a productional point of view, because it accelerates the binding of the mass.
  • the temperature differences occuring between the contents of the mold and the surrounding cause problems as far as the construction of the casting mold is concerned, because they easily give rise to strains causing distortion of at least the bottom member and the longitudinal side wall members of the mold. This in turn may easily damage the set, but still semi-plastic, cellular concrete bodies produced in the mold, e.g. by forming cracks therein, and also cause difficulties during the subsequent handling of the bodies, especially when the latter are moved from one support to another in connection with the cutting operation.
  • the plate must either be made extremely thick in order to remain flat between a relatively few number of widely distributed supporting spacer elements under the heavy loadof the cast mass, in which case considerable temperature strains with accompanying harmful bending tendencies will unavoidably occur in the plate itself, or else the number of supporting spacer elements must be very large, in which case the conduction of heat to the frame with accompanying risk of distortion of the latter will still be considerable.
  • the known mold bottom design is based on an almost entirely free equalization of temperature between the cast mass and the air on the lower side of the plate, which means that the contents of the mold will be cooled in an undesirable manner, even if the heat conduction to the frame can be kept low.
  • the object of the present invention is to provide a mold for casting cellular concrete, in which the drawbacks of the previously known types of molds as referred to herein before are eliminated and in which the heat generated during the expansion and binding of the cast mass can be effectively retained and successfully utilized to accelerate the solidification of the cast mass without it being necessary to use expensive conditioning tunnels or the like. More particularly it is the object of the invention to provide a mold having a high heat insulating capacity and in which the bottom and wall members do not show any inconvenient tendencies to crook or warp in spite of the fact that mold structure is sturdy and simple and does not depend on a delicate interaction of movable parts.
  • a mold according to this invention for casting cellular concrete bodies comprises a bottom member and a number of wall members, each of said members including a heat insulating filling for reducting heat losses from the concrete mass cast in the mold, and for thus preserving the increased temperature attained by the cast mass at the expansion and binding thereof, at least said bottom member of the mold comprising a stiffening open framework of metal and a sheet metal covering secured to the top side thereof in order to form the mold bottom proper.
  • Theinvention is primarily characterized by the facts that said framework is supported above and vertically spaced from a supporting structure by means of a limited number of widely spaced apart leg-like members being formed in a manner to carry away only negligible amounts of heat from said framework, and that the heat insulating filling of the bottom member covers both the lower side of said open framework and those portions of said sheet metal covering thereon, which are exposed through the openings of said framework, with the exception only of the areas occupied by said leg-like members, all in such a manner that said framework will as a whole assume and be maintained at approximately the same temperature as its sheet metal covering and the cast mass contained in the mold.
  • a mold bottom member of this kind will not only assist in preventing an undesirable cooling of the concrete mass but will also show substantially no tendency to crook or warp because of temperature variations in the cast mass.
  • the framework of the bottom member comprises a number of separate sections, each of which is supported by four leg-like members and has its own sheet metal covering, said sections being supported in line, the one behind the other, by a common supporting frame structure to form together a rectangular mold bottom in which each of said sections has an extension in the longitudinal direc-tion of said mold bottom which is at most equal to the width of said mold bottom, movable joints permitting separate expansion and contraction of said sections being provided between the sheet metal coverings.
  • Flg. 1 is a side view of the one half ofa mold for casting large bodies of cellular concrete
  • FIG. 2 is a longitudinal sectional elevation of the remaining half of the mold
  • FIG. 3 is an end view, partly in section, of the same. mold
  • FIG. 4 is a fragmentary sectional elevation illustrating on an enlarged scale the attachment of one of the legs of each mold bottom section to a related bracket on the supporting frame structure.
  • the casting mold illustrated in the drawing comprises a bottom member, generally designated by 1, two longitudinal side wall members, generally designated by 2, and two end wall members, generally designated by 3.
  • the mold comprises a supporting frame structure 4, to which the wall members 2 and 3 are connected by means of hinges 5 and 6, respectively, in a manner to be folded outwardlyand downwardly,
  • the structure 4 also serves as a carrier for the mold bottom member 1, and has, in the form illustrated, wheels 7 permitting movement of the entire mold unit. However, these wheels 7 may obviously be omitted, if the mold is to be stationary.
  • the mold bottommember' 1 is composed of a suitable number of table-like units, four in the drawing,
  • each framework section 8 which each comprise a stiffening framework section 8 consisting of a plurality of transverse U-beam elements 9 and a pair of longitudinally extending U-beam elements 10 forming together a sort of grate.
  • the beam elements 9 and 10 are suitably made of iron or steel.
  • Each framework section 8 has four supporting legs 12 made of relatively thin-walled steel tubes having their upper ends welded to the beams 9 and their lower ends resting on brackets 13 mounted on the outside of the supporting frame structure 4, which is narrower than the mold bottom proper.
  • each separate and identical table-like units comprising a framework section 8 and a covering plate 11 and each having an extension in the transverse direction of the mold which is equal to the full width of the mold bottom and an extension in the longitudinal direction of the mold which is at most equal to said width.
  • movable joints 14 of a design permitting a certain independent expansion and contraction of each separate table-like unit. These joints 14 may be lap joints with or without elastic filling strips.
  • the table-like units are supported in line, the one behind the other, on the supporting frame structure 4, which means that the joints 14 extend transversally.
  • the insulating filling 15 is kept in position by means of a cup-shaped thin-walled sheet metal casting l6 resting on top of the supporting frame structure 4. Through the insulating filling 15 only the supporting legs 12 of the table-like units extend downwardly to the supporting frame 4, and these legs have by their tubular configuration a very limited heat conducting capacity.
  • each table-like unit is to a certain extent free to expand and contract separately in all directions, butnevertheless the relative positions of the units are sufficiently fixed to always maintain the required sealing effect of the movable joints 14.
  • the brackets 13 are mounted on the supporting frame structure 4 in such positions, viz. close to a horizontal plane through the latter which is substantially neutral from the viewpoint of heat distribution in the vertical direction through the structure, that the heat supplied to the brackets through the legs 12 can I spread in the supporting frame without causing distortion or bending of the same.
  • the amount of heat transmitted through the legs 12 is small, the lastmentioned arrangement will warrant that also the sup,- porting frame structure 4 remains undistorted, so that the mold bottom will always maintain its flatness within very narrow tolerances entirely independent of any temperature variations in the mold contents.
  • the covering plates 11 forming the mold bottom proper may be thin because they are effectively supported and stiffened by their related framework section 8, and these framework sections may in turn be light and yet strong enough, because the covering plates add strenght to them and because they are relatively small in size. Accordingly, the heat transfer from the cast mass to the mold bottom member required to keep the latter at the same temperature as the mold contents will cause only a negligible decrease of the temperature of the cast mass.
  • the longitudinal side wall members 2 of the casting mold are generally built up in the same manner as the bottom member 1 in order to prevent, as far as possible, heat losses form the mold contents and distortion.
  • Each side wall member 2 comprises an inner sheet metal covering which by welding is secured to the internal side of a stiffening U-beam element 26 extending in practically the full length of the mold.
  • the beam element 26 there are also attached a number of widely distributed bolts 27 serving to retain an outer thin-walled sheet metal casing 28 for a heat insulating filling 29 which entirely covers the outside of the beam element 26 as well as the portion of the covering plate 25 which projects above the same.
  • the insulating filling is, in addition, extended downwardly below the upper side of the mold bottom, at 29, in order to reduce the possible heat losses from the longitudinal edges of the covering plates 11 of the mold bottom member.
  • the end wall members 3 of the casting mold consist in their turn each of an inner sheet metal plate 30 and an external heat insulating filling 31, which is protected by a sheet metal casing 32.
  • a sheet metal casing 32 In view of the moderate size of the end wall members, no stiffening framework or beam element is required in them, but the plate 30 is provided with a framing of bars 33 in order not to become damaged when the casting mold is used.
  • the side wall members 2 and the end wall members 3 are kept together by means of bolts 34 mounted on the end wall members and cooperating with ears 35 at the ends of the side wall members.
  • the folded up wall members 2 and 3 seal against the upper side of the bottom member 1 by means of elastic strips 36.
  • the inner faces of the mold i.e. the upper face of the bottom member 1 and the inner face of the wall members, may be coated with rubber, plastic or similar material preventing the cast mass from adhering and hence facilitating dismantling or stripping of the cast body.
  • LA mold for casting cellular concrete bodies and comprising a main supporting structure, a bottom member and a number of wall members, each of said bottom and wall members including a heat insulating layer for reducing heat losses from the concrete mass cast in the mold, at least said bottom member comprising a stiffening open framework of metal and a sheet metal covering secured to the top side thereof to form the mold bottom proper, said framework being supported above and vertically spaced from said supporting structure by means of a limited number of widely spaced apart leg-like members being formed in a manner to carry away only negligible amounts of heat from said framework, and said heat insulating filling of the bottom member covering both the lower side of said open framework and of those portions of said sheet metal covering exposed through the openings of said framework, with the exception only of the areas occupied by said leg-like members, all in such a manner that said framework will as a whole assume and be maintained at approximately the same temperature as its sheet metal covering and the cast mass contained in the mold.
  • said framework of the bottom member comprises a number of separate sections, each of which is supported by four leg-like members and has its own :sheet metal covering, said sections being supported in line, the one behind the other, by said supporting frame structure to form together an elongate rectangular mold bottom member in which each of said sections has an extension in the longitudinal direction which is at most equal to the width of said mold bottom member, movable joints permitting separate expansion and contraction of said sections being provided between the sheet metal coverings thereof.
  • a mold as claimed in claim 2 wherein the lower ends of said leg-like supporting members are connected to said supporting structure at points thereon, from which heat transmitted through said legs can spread in the supporting structure without causing distortion and bending of the latter.
  • leg-like members have their upper ends rigidly connected to said framework and their lower ends movably connected to brackets on said supporting structure.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
US00160282A 1970-07-31 1971-07-07 Mold for casting cellular concrete bodies Expired - Lifetime US3708148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE10531/70A SE344303B (de) 1970-07-31 1970-07-31

Publications (1)

Publication Number Publication Date
US3708148A true US3708148A (en) 1973-01-02

Family

ID=20292470

Family Applications (1)

Application Number Title Priority Date Filing Date
US00160282A Expired - Lifetime US3708148A (en) 1970-07-31 1971-07-07 Mold for casting cellular concrete bodies

Country Status (17)

Country Link
US (1) US3708148A (de)
AT (1) AT306611B (de)
BR (1) BR7104767D0 (de)
CA (1) CA946138A (de)
CH (1) CH530244A (de)
CS (1) CS158557B2 (de)
DE (1) DE2138341A1 (de)
DK (1) DK126165B (de)
ES (1) ES196274Y (de)
FI (1) FI55953C (de)
FR (1) FR2103331A5 (de)
HU (1) HU164910B (de)
NO (1) NO131056C (de)
PL (1) PL77751B1 (de)
RO (1) RO57714A (de)
SE (1) SE344303B (de)
YU (1) YU35313B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873057A (en) * 1973-07-11 1975-03-25 Brown & Root Apparatus for weight coating pipe segments
US4095771A (en) * 1971-12-17 1978-06-20 Lely Cornelis V D Devices for manufacturing wall partitions
US4354656A (en) * 1980-08-04 1982-10-19 Kain Arthur F Suspension idler mold apparatus
USD429822S (en) * 1999-09-15 2000-08-22 Jensen Daniel M Building unit
US6676862B2 (en) 1999-09-15 2004-01-13 Advanced Building Systems, Inc. Method for forming lightweight concrete block
US20140333010A1 (en) * 2013-05-13 2014-11-13 Romeo Ilarian Ciuperca Removable composite insulated concrete form, insulated precast concrete table and method of accelerating concrete curing using same
US10220542B2 (en) * 2013-05-13 2019-03-05 Romeo Ilarian Ciuperca Insulated concrete battery mold, insulated passive concrete curing system, accelerated concrete curing apparatus and method of using same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3443286A1 (de) * 1984-11-28 1986-06-05 Industrieanlagen Auerbach-Föro GmbH, 4750 Unna Vorrichtung zum giessen und manipulieren des sogenannten masseblockes im zuge der herstellung von leichtbetonbaukoerpern
DE19511744C2 (de) * 1995-03-30 1997-08-14 Ytong Ag Vorrichtung zur Betätigung von Verriegelungseinrichtungen an einer Schalungsform für Beton, insbesondere für Gasbeton
WO1996032238A1 (en) * 1995-04-12 1996-10-17 Leopold Rolek A method for forming gypsum structural elements by using thermoinsulating inserts, and a mold for manufacturing structural elements

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095771A (en) * 1971-12-17 1978-06-20 Lely Cornelis V D Devices for manufacturing wall partitions
US3873057A (en) * 1973-07-11 1975-03-25 Brown & Root Apparatus for weight coating pipe segments
US4354656A (en) * 1980-08-04 1982-10-19 Kain Arthur F Suspension idler mold apparatus
USD429822S (en) * 1999-09-15 2000-08-22 Jensen Daniel M Building unit
US6676862B2 (en) 1999-09-15 2004-01-13 Advanced Building Systems, Inc. Method for forming lightweight concrete block
US7942658B1 (en) 1999-09-15 2011-05-17 Advanced Building Systems, Inc. Systems for forming lightweight concrete block
US20140333010A1 (en) * 2013-05-13 2014-11-13 Romeo Ilarian Ciuperca Removable composite insulated concrete form, insulated precast concrete table and method of accelerating concrete curing using same
US10065339B2 (en) * 2013-05-13 2018-09-04 Romeo Ilarian Ciuperca Removable composite insulated concrete form, insulated precast concrete table and method of accelerating concrete curing using same
US10220542B2 (en) * 2013-05-13 2019-03-05 Romeo Ilarian Ciuperca Insulated concrete battery mold, insulated passive concrete curing system, accelerated concrete curing apparatus and method of using same

Also Published As

Publication number Publication date
SE344303B (de) 1972-04-10
ES196274Y (es) 1975-07-16
CA946138A (en) 1974-04-30
ES196274U (es) 1975-03-01
AT306611B (de) 1973-04-25
RO57714A (de) 1975-01-15
FI55953C (fi) 1979-11-12
CS158557B2 (de) 1974-11-25
DE2138341A1 (de) 1972-02-03
FI55953B (fi) 1979-07-31
BR7104767D0 (pt) 1973-03-08
PL77751B1 (de) 1975-04-30
NO131056C (de) 1975-04-02
YU35313B (en) 1980-12-31
YU181671A (en) 1980-06-30
HU164910B (de) 1974-05-28
DK126165B (da) 1973-06-18
CH530244A (de) 1972-11-15
FR2103331A5 (de) 1972-04-07
NO131056B (de) 1974-12-23

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