US2632226A - Mold for casting monolithic spherical tanks - Google Patents

Mold for casting monolithic spherical tanks Download PDF

Info

Publication number
US2632226A
US2632226A US111037A US11103749A US2632226A US 2632226 A US2632226 A US 2632226A US 111037 A US111037 A US 111037A US 11103749 A US11103749 A US 11103749A US 2632226 A US2632226 A US 2632226A
Authority
US
United States
Prior art keywords
mold
segments
tubular element
casting
plate
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.)
Expired - Lifetime
Application number
US111037A
Other languages
English (en)
Inventor
Arthur R Anderson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US111037A priority Critical patent/US2632226A/en
Priority to CH292003D priority patent/CH292003A/fr
Priority to DEA3268A priority patent/DE861017C/de
Application granted granted Critical
Publication of US2632226A publication Critical patent/US2632226A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • 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
    • B28B7/168—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes for holders or similar hollow articles, e.g. vaults, sewer pits
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/04—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for structures of spherical, spheroid or similar shape, or for cupola structures of circular or polygonal horizontal or vertical section; Inflatable forms

Definitions

  • a mold for casting monolithic tanks of generally spherical form comprises an inner mold assembly made up of structural segments removably secured together, an outer mold assembly made up of structural segments removably secured together, and removable spacing elements constructed and arranged to support the inner mold assembly in spaced relationship to the outer mold assembly.
  • the structural segments of the inner mold assembly are of arcuate tapering form, and the removable spacing elements comprise a pair of members extending from the bottom of the mold to an opening in the top of the mold, and a fastening adjacent the opening for fixing the position of these members relative to one another. Plates at the bottom of the mold provide securing and clamping means for the inner and outer mold segments.
  • One of the spacing elements is retractable during the casting operation to permit flow of cast material into the space first occupied by said spacing element whereby the tank is of monolithic construction and has walls devoid of seams or openings except at its top.
  • the arcuate tapering segments of the inner mold assembly preferably have inwardly extending flanges along their meeting edges, and resilient strips between these flanges permit contraction as the cast material solidifies. Tensioning bands inside the inner mold assembly pull the segments tightly together.
  • the spacing and securing means are readily dismantled, and the inner mold segments are removable through the small opening left in the top of the monolithic tank.
  • Fig. l is a side elevational view of the mold and molded container, partly broken away in central vertical cross-section, and with the upper centering and retaining members removed.
  • Fig. 2 is a plan view of the same, partly broken away in central horizontal cross-section, with the upper and lower centering and retaining members removed.
  • Fig. 3 is an enlarged vertical cross-sectional view of the upper portion of the mold and molded container before removal of the centering and retaining members; and Fig. 4 is a similar view of the lower portion of the mold and molded container.
  • Fig. 5 is an enlarged partial central horizontal sectional view of the inner mold, showing one of the tensioning elements and the collapsible key section of the inner mold.
  • Fig. 6 is a detail view looking at the inside of the inner mold and showing in front elevation the retaining means for the two parts of the collapsible key section.
  • Fig. 7 is a detail perspective view of one of the devices for applying tension to the cables inside of the inner mold.
  • Fig. 8 is a central vertical cross-sectional view of one form of top closure for the molded container.
  • my improved mold apparatus in its general arrangement comprises an inner mold assembly 9 and an outer mold assembly Iii.
  • the inner mold assembly is made up of twelve structural segments H which are of arcuate tapering form (or of a form which might be likened to that of an orange peel). Along their meeting edges these segments have inwardly extending flanges such as those provided by the inwardly extending legs of angle irons i2 welded or otherwise fixed to the marginal edges of the segments.
  • each segment is made of two complementary sections l3 of cylindrical form tapering toward their ends.
  • Sections [3 can be blanked out separately, rolled to cylindrical form and welded together where they meet at it, or, alternatively, segments H can be formed in one piece in a press. In either case, since the meeting sections of adjacent segments lie in common cylindrical surfaces, the inwardly extending legs of angle irons l2 can be arranged normal to these surfaces. Thus right angle irons can be used without special deformation other than to roll them into a curved form to match the cylindrical form of the meeting sections of segments l l.
  • the meeting edges of segments II and the meeting edges of sections l3 are arcs of great circles of a sphere.
  • the outer mold assembly is made up of four structura ⁇ segments l5 substantially conforming to the shape of the inner mold assembly but slightly larger so as to provide a casting cavity between the two mold assemblies, the spacing between them being designed to produce a cast body of the desired wall thickness.
  • Segments are made up of a series of sections of cylindrical form tapering toward their ends as described in connection with segments ll of the inner mold assembly. As shown, each segment 15 has four cylindrical sections. The meeting edges of these segments are flanged or are bound with angle irons l6 by which they are secured together with bolts l1.
  • the removable spacing elements comprise a pair of members extending from the bottom of the mold to an opening in the top of the mold. These members, in the embodiment illustrated, consist of a tubular element l8 and a post l9. An inner center bottom plate holds the lower ends of segments II which are flanged upwardly and inwardly at 2
  • Tubular element [8 fastens to the plate 20, as by a screw threaded engagement 22, and extends upwardly therefrom through the center of the mold.
  • a clamping plate 23 is welded or otherwise fixed to tubular element 18, and upon tightening the aforesaid screw threaded connection serves to clamp flanges 2
  • An outer center bottom plate 24 holds the lower ends of the segments l5 of the outer mold assembly. These preferably are flanged downwardly at 25 and have marginal ring segments or lugs 26 welded to them to receive stud bolts 2! extending through plate 24 to secure the segments l5.
  • Post I9 fastens to plate 24, as by a nut 23 engaging the reduced threaded end of the post, and extends upwardly therefrom through tubular element l8.
  • a fastening pin 29 extends through aligned apertures in the post and tubular element near the top of the mold to hold them against relative movement thereby supporting the bottoms of the inner and outer mold assemblies in predetermined spaced relationship.
  • Fig. 3 also shows fastening elements for securing the upper ends of the inner and outer se ments, these elements engaging tubular element l8 to center the upper ends of the inner and outer mold assemblies.
  • these fastening elements consist of the follow ing: first, for the inner segments, there is a hoop 30 which is slipped over the upwardly flanged ends 3
  • Plate 36 has a central aperture to slidably receive tubular element l8.
  • split ring 32 clamps the flanged ends of segments ll between it and hoop 33.
  • ring 3'1 having a central aperture for element l8 and threaded to receive bolts 38 the ends of which engage brackets 39 fixed to the upper ends of segments l5.
  • Tensioning bands or cables 40 (Figs. 3, 4 and 5) arranged inside the inner mold assembly engage a series of hooks 4
  • a toggle clamp 42 such as shown in Figs. 5 and '7 may be used to tighten the bands 40.
  • Other well-known means such as a turnbuckle, could be used instead.
  • Mold segment H constitutes a key section to facilitate stripping the inner mold assembly at the conclusion of the casting operation, 1. e. after the cast material has set up sufficiently to retain its form.
  • This key section is made in two parts 43, 44, part 44 having an offset flange 45, and the two parts being held apart by a spacing bar or bars 46 removably bolted to lugs 5'! fixed to the respective parts.
  • the inner mold segments I l, l I having been forced tightly together by the tension in bands 43 and any shrinkage of the cast body, are relieved of pressure by first removing key section I l which col lapses readily as soon as spacer bar or bars 46 are removed.
  • parts 44 and 43 are withdrawn through the opening in the top of the cast tank, and the remaining segments II are also withdrawn.
  • the maximum width of segments ll, and consequently the number of such segments, is so selected in relation to the size of the opening in the top that the segments can be readily withdrawn.
  • the top opening can be finished off with the use of a trowel after the concrete or other material has been cast.
  • a split band 48 (Fig. 3) can be used to help in molding the edge of the opening to the desired form and reduce the amount of hand trowelling required.
  • Cover section 59 (Fig. 8), with pipe connections 50, can be formed in a conventional mold and sealed into the tank opening with a suitable gasket or plastic sealing compound forced into complementary recesses in the edges of the container opening and cover.
  • Post 19 is now keyed in place with pin 29 and with outer center bottom plate 24 secured by nut 28.
  • top ring 3'! in place, I next erect the outer mold segments l5 one by one, each being secured in turn by stud bolts 21 at the bottom and spacer bolts 38 at the top. Finally, the segments l5 are secured to one another at their meeting edges by the bolts ET. This completes assembly of the entire mold.
  • the mold is now filled with the material from which the tank or other container body is to be made.
  • the material in a liquid or plastic state is poured into the mold through the annular space between the inner and outer mold assemblies at the top.
  • the post l9 can be raised immediately after filling the mold, allowing the space between plates 20 and 24 to be completely filled.
  • the hole in plate 24 can be plugged.
  • the boundary of the opening at the top of the container can be formed with the metal ring d8, or the plastic material can be trowelled to the desired design.
  • these members can be as- Plate 20 is removed and the mold is now ready for re-use in molding another container, subject to any necessary cleaning.
  • a mold for casting monolithic tanks of generally spherical form comprising inner and outer mold assemblies made up of arcuate tapering segments, fastening elements for securing the ends of the segments together, and removable spacing elements associated with said fastening elements to hold the inner and outer mold assemblies in spaced relationship, said removable spacing elements comprising a pair of members extending centrally through the mold from the bottom of the mold to an opening in the top of the mold and a fastening adjacent the opening for fixing the position of said pair of members relative to one another to predetermine the aforesaid spaced relationship between the inner and outer mold assemblies.
  • a mold for casting monolithic hollow bodies of generally spherical form comprising an inner mold assembly made up of arcuate tapering segments, an inner center bottom plate for holding the lower ends of said segments, a tubular element which fastens to said plate and extends upwardly therefrom through the center of the mold, an outer mold assembly made up of segments, an outer center bottom plate for holding the lower ends of said outer segments, a post which fastens to said outer plate and extends upwardly therefrom through said tubular element, and a fastening for holding said post and w bular element against relative movement thereby supporting the bottoms of said inner and outer mold assemblies in predetermined spaced relationship.
  • a mold for casting monolithic hollow bodies of generally spherical form comprising an inner mold assembly made up of arcuate tapering segments, an inner center bottom plate for holding the lower ends of said segments, a tubular element which fastens to said plate and extends upwardly therefrom through the center of the mold, an outer mold assembly made up of segments, an outer center bottom plate for holding the lower ends of said outer segments, a post which fastens to said outer plate and extends upwardly therefrom through said tubular element, a fastening for holding said post and tubular element against relative movement thereby supporting the bottoms of said inner and outer mold assemblies in predetermined spaced relationship, and fastening elements for securing theupper ends of'said inner and outer segments,
  • said fastening elements engaging said tubular element to center the upper ends of the inner and outer mold assemblies.
  • a mold for casting monolithic hollow bodies of generally spherical form comprising an inner mold assembly made up -of arcuate taperingse'gments, an inner center bottom plate for holding the lower ends of said segments, a tubular element which fastens to'said plate and extends upwardly therefrom through the center of the mold, an outer mold assembly made up of segments, an outer center bottom plate for holding the lower ends of said outer segments, a post which fastens to said outer plate and extends upwardly therefrom through said tubular element, a fastening for holding said post and tubular element against relative movement thereby supporting the bottoms of said inner and outer mold assemblies in predetermined spaced relationship, and a clamping plate'fixed to said tubular element adjacent the inner center bottom plate, the tubular element having a screw threaded engagement with the last-named plate whereby the lower ends of the inner segments can be clamped between the two last-named plates by turning the tubular element after the inner segments have been assembled.
  • a mold for casting monolithic hollow bodies of generally spherical form comprising an inner mold assembly made up of arcuate tapering segments, an inner center bottom plate for holding the lower ends of said segments, a tubular element which fastens to said plate and extends upwardly therefrom through the center of the mold, an outer mold assembly made up of segments, an outer center bottom plate for holding the lower ends of said outer segments, a post which fastens to said outer plate and extends upwardly therefrom through said tubular element, a fastening for holding said post and tubular element against relative movement thereby supporting the bottoms of said inner and outer mold assemblies in predetermined spaced rela- 8 tionship, and said post being'retractable through said tubular element after the body has been cast whereby the space between the inner and outer center bottom plates can be completely filled through flow of the cast material before it has "set.
  • a mold for casting tanks of generally spherical form comprising inner and outer mold assemblies made up of inner and outer arcuate tapering segments, fastening elements for securing the ends of the inner segments together and for securing the ends of the outer segments together, and spacing elements associated with said fastening elements to hold the inner and outer mold assemblies in predetermined spaced relationship, one of the spacing elements being removable during the casting operation to permit flow of cast material into the space first occupied by said spacing element whereby the tank is of monolithic construction and has walls devoid of seams or openings except at its top.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
US111037A 1949-08-18 1949-08-18 Mold for casting monolithic spherical tanks Expired - Lifetime US2632226A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US111037A US2632226A (en) 1949-08-18 1949-08-18 Mold for casting monolithic spherical tanks
CH292003D CH292003A (fr) 1949-08-18 1950-08-16 Moule pour couler un réservoir de forme généralement sphérique.
DEA3268A DE861017C (de) 1949-08-18 1950-08-17 Form zum Giessen von aus einem Stueck bestehenden Behaeltern von allgemein kugelfoermiger Gestalt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US111037A US2632226A (en) 1949-08-18 1949-08-18 Mold for casting monolithic spherical tanks

Publications (1)

Publication Number Publication Date
US2632226A true US2632226A (en) 1953-03-24

Family

ID=22336277

Family Applications (1)

Application Number Title Priority Date Filing Date
US111037A Expired - Lifetime US2632226A (en) 1949-08-18 1949-08-18 Mold for casting monolithic spherical tanks

Country Status (3)

Country Link
US (1) US2632226A (fr)
CH (1) CH292003A (fr)
DE (1) DE861017C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206532A (en) * 1963-06-24 1965-09-14 M C Nottingham Co Of Temple Ci Method for casting cement tanks
US3301041A (en) * 1964-08-28 1967-01-31 Donald W Mueller Prestressed concrete containment vessel
FR2565885A1 (fr) * 1984-03-02 1985-12-20 Caveaux Prefabriques Procede et dispositif pour la fabrication d'une cuve monobloc coulee d'une seule piece

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE246046C (fr) *
US750468A (en) * 1904-01-26 Tank-mold
US1023465A (en) * 1911-06-30 1912-04-16 Edgar P Fox Mold for tanks.
US1189694A (en) * 1914-04-16 1916-07-04 Borsari & Co Receptacle.
US1272886A (en) * 1917-08-25 1918-07-16 Thomas B Atkins Apparatus for molding silos and the like.
US1508145A (en) * 1919-09-04 1924-09-09 Kolwes Rudolf Large-sized oil tank
US1535023A (en) * 1923-04-19 1925-04-21 Carleton H Kelley Sectional mold for concrete structures
US1913178A (en) * 1928-01-03 1933-06-06 Standard Cementconstruction Co Molding apparatus
US2278089A (en) * 1940-10-07 1942-03-31 Mark C Nottingham Form for septic tanks
US2413243A (en) * 1944-03-07 1946-12-24 Neff Wallace Storage tank and method of constructing same
US2495100A (en) * 1946-03-27 1950-01-17 Cemenstone Corp Apparatus for making precast concrete units

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE246046C (fr) *
US750468A (en) * 1904-01-26 Tank-mold
US1023465A (en) * 1911-06-30 1912-04-16 Edgar P Fox Mold for tanks.
US1189694A (en) * 1914-04-16 1916-07-04 Borsari & Co Receptacle.
US1272886A (en) * 1917-08-25 1918-07-16 Thomas B Atkins Apparatus for molding silos and the like.
US1508145A (en) * 1919-09-04 1924-09-09 Kolwes Rudolf Large-sized oil tank
US1535023A (en) * 1923-04-19 1925-04-21 Carleton H Kelley Sectional mold for concrete structures
US1913178A (en) * 1928-01-03 1933-06-06 Standard Cementconstruction Co Molding apparatus
US2278089A (en) * 1940-10-07 1942-03-31 Mark C Nottingham Form for septic tanks
US2413243A (en) * 1944-03-07 1946-12-24 Neff Wallace Storage tank and method of constructing same
US2495100A (en) * 1946-03-27 1950-01-17 Cemenstone Corp Apparatus for making precast concrete units

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206532A (en) * 1963-06-24 1965-09-14 M C Nottingham Co Of Temple Ci Method for casting cement tanks
US3301041A (en) * 1964-08-28 1967-01-31 Donald W Mueller Prestressed concrete containment vessel
FR2565885A1 (fr) * 1984-03-02 1985-12-20 Caveaux Prefabriques Procede et dispositif pour la fabrication d'une cuve monobloc coulee d'une seule piece

Also Published As

Publication number Publication date
DE861017C (de) 1952-12-29
CH292003A (fr) 1953-07-31

Similar Documents

Publication Publication Date Title
US3193847A (en) Collapsible swimming pool
US2228123A (en) Apparatus for molding concrete burial vaults
US2632226A (en) Mold for casting monolithic spherical tanks
US3348802A (en) Mold box
US1032419A (en) Sectional mold for concrete wall construction.
US3779021A (en) Method of making a headwall
US3288425A (en) Form for hollow concrete structures
US1299739A (en) Mold for reinforced-concrete posts and the like.
US3163910A (en) Septic tank forms
US2274236A (en) Mold
US1723631A (en) Mechanism for concrete construction
US3313515A (en) Skimmer cavity casting apparatus with means for holding plumbing conduit
US2559296A (en) Pipe mold
US986134A (en) Apparatus for forming concrete building-work.
US1515057A (en) Collapsible mold
CN110499914A (zh) 反坎模板加固用预埋件、反坎模板加固结构及其施工方法
US2646606A (en) Rubber core mold
JP2681206B2 (ja) コンクリートパイル等の製造装置及びこれに使用する長さ調整可能な緊張ロッド装置
US1407246A (en) Concrete mold
US927806A (en) Collapsible cistern-mold.
US2892237A (en) Concrete form
JPH06136938A (ja) 型枠装置
US3355137A (en) Mold for manufacturing concrete members having cruciform cross section
US2901809A (en) Means of forming catch basins
US4034956A (en) Apparatus for forming crypts