US3412785A - Core support for a centrifugal casting mould for casting pipes having a socket, and mould provided with said support - Google Patents

Core support for a centrifugal casting mould for casting pipes having a socket, and mould provided with said support Download PDF

Info

Publication number
US3412785A
US3412785A US566114A US56611466A US3412785A US 3412785 A US3412785 A US 3412785A US 566114 A US566114 A US 566114A US 56611466 A US56611466 A US 56611466A US 3412785 A US3412785 A US 3412785A
Authority
US
United States
Prior art keywords
mould
core
support
cup
locking ring
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
US566114A
Other languages
English (en)
Inventor
Lorang Pierre Edouard
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.)
CENTRE DE RECHERCHES DE PONT-A-MOUSSOU
CT DE RECH S DE PONT A MOUSSOU
Original Assignee
CT DE RECH S DE PONT A MOUSSOU
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 CT DE RECH S DE PONT A MOUSSOU filed Critical CT DE RECH S DE PONT A MOUSSOU
Application granted granted Critical
Publication of US3412785A publication Critical patent/US3412785A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • B22D13/101—Moulds
    • B22D13/104—Cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings

Definitions

  • the present invention relates to centrifugal casting moulds for casting pipes having a socket and in particular but not exclusively to moulds for casting cast iron pipes.
  • moulds of this type comprise a core which imparts the internal shape of the socket.
  • This core is supported by a device (yoke) comprising centering means for centering it in the mould and locking means for maintaining it firmly in position in the course of the high-speed rotation of the mould and resisting the centrifugal pressure of the liquid iron.
  • the core is of sand and is used for only one casting operation, not only must its support be withdrawable as is known by pivoting or tilting so as to permit the extraction of the cast pipes and the replacement of the destroyed core by a fresh core, but the support must be so designed as to permit rapidly positioning and perfectly centering each new core.
  • Core-locking devices which comprise lugs which project radially relative to the bearing face at the end of the mould so as to retain the core by the abutment of its end face against said lugs.
  • the latter can project internally under the action of springs or of the centrifugal force when the mould rotates. They are mounted in such manner that they are exposed to projections of liquid iron which occur when the latter sometimes is in excess in the pipe socket zone. Consequently, it is sometimes necessary to remove the pieces of excess iron which may block the locking device and this is a loss of time and slows down production.
  • the lug-type locking devices are connected to the mould. This arrangement does not lend itself well to a mechanical feeding of the cores.
  • the object of the invention is to provide for a centrifugal casting mould for casting pipes having a socket, a socket core support which ensures in a simple and effective manner the locking of said cores and is unexposed to the projections of iron and adaptable to a mechanical feeding of the cores.
  • the core support or yoke, mounted at the end of a swingable handling arm, for a centrifugal casting mould comprises in combination a cup for supporting and centering the core and extended by an outwardly divergent deflecting cone; a locking ring inserted with clearance in the cup coaxially of the latter; compressed air blowing means for blowing air between the locking ring and the end face of the recess for the ring in the cup, a handling stirrup mounted at its ends on the locking ring to be pivotable about an axis intersecting the axis of rotation of the mould, and a handling arm on the end of which the stirrup is mounted to be slightly pivotable about an axis perpendicular to the pivot axis of the stirrup on the locking ring.
  • Another object of the invention is to provide a centrifugal casting mould for casting pipes having a socket, said mould including a core support of the above-described type.
  • FIG. 1 is a diagrammatic view, partly in section, of a mould according to the invention.
  • FIG. 2 is a partial end view taken along line 2--2 of FIG. 1, and
  • FIG. 3 is a detailed sectional view, on an enlarged scale, of the core support according to the invention.
  • the invention is shown to be applied to a rotary mould M having a roughly honizontal axis X-X and intended for centrifugally casting a pipe T having a socket and composed for example of cast iron.
  • This mould comprises two rolling rings 1 which cooperate with two pairs of support rollers 2 mounted between bearings 3.
  • a motor 4 rotates the rollers 2 of one of said pairs of rollers.
  • the assembly is mounted on a centrifugal casting machine which is represented diagrammatically by its casing C.
  • the mould M comprises at the end thereof adjacent the socket of the pipe T to be obtained (FIGS. 1 and 3), a divergent cavity 5 in the form of a tulip or bell which is enlarged at the entrance thereof in the form of two successive cylindrical recesses, namely recess or housing 6 for a core N which imparts the inner shape to the socket, and recess or housing 7 which is of greater diameter for supporting said core.
  • the divergent cavity 5 is separated from the core recess 6 by a transverse face 8.
  • the recess 7 is connected to the exterior by a divergent conical entrance portion 9 or countersinking.
  • the core N is for example of sand. It comprises near its end a flange 10 which acts as a print for the end face of the pipe and bears on the transverse face 8 located between the bell 5 and recess 6.
  • the core is extended beyond the flange 10 by a cylindrical male support or bearing face 11.
  • the core or yoke support S according to the invention comprises three parts:
  • a rotary core support and centering cup A rotary core support and centering cup.
  • a rotary cone for protecting against projection of iron, or deflecting cone A rotary cone for protecting against projection of iron, or deflecting cone.
  • a locking ring which is prevented from rotating and mounted on a handling stirrup carried by a swingable arm for placing in position or withdrawing the core support S.
  • This support S of the core N therefore comprises a cup 12 having the shape of a circular plate and an axis XX and a diameter slightly less than that of the recess 7.
  • This cup has an axial bore or aperture 13 whose diameter corresponds to that of the diameter of the bearing face 11 for the core N.
  • This bore 13 thus constitutes a centering support face for this core.
  • the cup 12 comprises on one side an annular plane face 14 for urging the flange 10 of the core against the transverse face 8 of the mould.
  • the face 14 corresponds to the face 8 of the mould and is inwardly defined by an inner recess 15.
  • the cup 12 is extended beyond the support face 13 by an outwardly divergent deflecting cone 16 which has an axis XX and is adapted to protect the locking means of the support S from projections or splashes of iron.
  • the cup 12 is provided with an annular recess or housing 17 having an axis XX on the side of the cup opposed to the face 14, that is, adjacent the deflecting cone 16.
  • a locking ring 18 is inserted with clearance in the recess 17.
  • the locking ring 18 is provided with an annular groove 19 on its periphery in which groove is engaged the teat of at least one clamping screw 20 which is radially screwed into the wall of the cup 12 so as to interconnect the cup 12 and the locking ring 18 axially but not as concerns rotation, the end teat of each screw 20 extending into the interior of the annular recess 17.
  • the groove 19 has a width exceeding the diameter of the teat or teatsso that there is a certain amount of axial play between the cup 12 and the locking ring 18.
  • This locking ring 18 is provided internally with an annular cavity 21 having an axis X-X. Communicating with this cavity 21 is the aperture of a connection element 22 located at the end of a flexible conduit 23 supplying compressed air. On its opposite face adjacent the end face of the recess 17, the ring 18 is provided with a number of blowing orifices 24 which are disposed on a circle and communicate with the cavity 21.
  • a friction ring 25 having roughly the same diameter as the locking ring, is interposed between the latter and the recess 17 in the cup 12.
  • This ring 25 can be of plastics material, such as red fibre, Teflon or of antifriction metallic material such as bronze or lead-antimoine alloys or of a combination of plastics materials and metallic materials.
  • the core support or yoke S is carried by a handling device. This will now be described with reference to FIGS. 1 and 2.
  • the locking ring 18 comprises a pair of ears 26 which are diametrically opposed. Mounted on these ears to pivot about a diametrical axis YY are the ends of a handling stirrup E.
  • the stirrup E is itself pivotable through a few degrees at 27 on the end of a swingable handling arm B.
  • the pivotal connection 27 of the stirrup E to the arm B has an axis ZZ which is perpendicular to the pivot axis of the stirrup E on the ears 26.
  • the pivotal connection 27 is retained axially by a locking device of known type, for example pins 28 which engage with a slight clearance in apertures 29 formed in the pivot 27.
  • the swingable arm B is carried by a shaft D having an axis parallel to the axis X-X mounted outside the machine so as to be rotatable through a fraction of a revolution and movable axially in the known manner.
  • it is mounted in the known manner in the extension of the piston rod of a jack V to which it is connected as concerns axial movement by a coupling A which allows it to rotate.
  • the shaft D is driven in rotation a fraction of a revolution in the known manner for example by a transverse jack W which actuates a lever 30 connected to a sleeve 31 slidably keyed to the shaft D.
  • the jacks V and W are fixed to the outside of the centrifugating machine.
  • This machine permits the introduction and withdrawal of the core N from the mould M and the swinging of the support S outside the axis of the mould (position of the arm B shown in dot-dash line in FIG. 2) so that the mould pipe T can then be withdrawn and the mould can receive a new core N.
  • This machine operates in the following manner:
  • the support S When the mould has stopped rotating, the support S is withdrawn from the mould by the action of the jack V and swung through a fraction of a revolution by the action of the jack W so that a core N can be placed in position.
  • This core is therefore introduced in the centering support or hearing face 13 of the support S until its flange is applied against the face 14 of the cup 12.
  • the jacks W and V are actuated in succession so as to return the support S to the position in which it is coincident with the axis XX of the mould and insert the core N in the mould.
  • the support S is freely centered by its cup 12 in its housing or recess 7 in the mould.
  • the support S tends to apply the flange 10 of the core against the transverse face 8 at the inner end of the recess 6.
  • the core is held perfectly flat against the face 8 of the mould in the manner described hereinafter.
  • the friction ring 25 is thus thrust away from the locking ring 18 and flat against the inner end of the annular recess 17 in the cup 12. Consequently, the axial locking thrust of the ring 18, which is prevented from rotating, on the rotary cup 12 is exerted through the friction ring 25. In this way a perfect abutment of the core N against the face 8 of the mould is achieved.
  • the core N which is urged against the mould
  • its support S cup 12 and deflecting cone 16
  • the friction ring 25 also has a tendency to rotate owing to the fact that it is in contact with the inner end face of the annular recess 17 of the cup 12.
  • the deflecting cone 16 prevents the centrifugal projections or splashes from reaching the locking ring 18.
  • the support S is perfectly protected as concerns its locking means by the deflecting cone 16.
  • the cup 12 remains connected to the locking ring 18 when the arm B is shifted axially and swung round.
  • the invention has been more particularly described in relation to the moulding of cast iron pipes, it is also applicable to the moulding of pipes having a socket and composed of plastics material, such as a thermosetting resin, or of a material having a cement base (concerte, asbestos-cement).
  • the socket core can be of plastics, elastic or metallic material.
  • the deflecting cone 16 can be detachably secured to the latter.
  • a core support for a centrifugal casting mould for casting a pipe having a socket comprising in combination: a cup for supporting and centering the core and having an annular recess and extended by an outwardly divergent deflecting cone; a locking ring inserted with clearance in the recess in the cup coaxially of the latter; compressed air blowing means for blowing air between the locking ring and the inner end face of the recess in the cup, a handling stirnup mounted at its ends on the locking ring to be pivotable about an axis intersecting the axis of rotation of the mould, and a handling arm on the end of which the stirrup is mounted to be slightly pivotable about an axis perpendicular to the pivot axis of the stirrup on the locking ring.
  • a core support as claimed in claim 3, wherein the cup comprises, on the side thereof opposed to the face adjoining the flange of the core, an annular recess in which the locking ring is inserted with clearance.
  • blowing apertures extend through the locking ring and communicate with the face of the ring adjacent the inner end face of the recess of the cup in which the ring is inserted.
  • a mould and core for centrifugal casting combined with a core support comprising in combination: a cup for supporting and centering the core and having an annular recess and extended by an outwardly divergent deflected cone; locking ring inserted with clearance in the recess in the cup coaxially of the latter; compressed air blowing means for blowing air between the locking ring and the inner end face of the recess in the cup, a handling stirrup mounted at its end on the locking ring to be pivotable about an axis intersecting the axis of rotation of the mould, and a handling arm on the end of which the stirrup is mounted to be slightly pivotable about an axis perpendicular to the pivot axis of the stirrup on the locking ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulding By Coating Moulds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Centrifugal Separators (AREA)
US566114A 1965-07-26 1966-07-18 Core support for a centrifugal casting mould for casting pipes having a socket, and mould provided with said support Expired - Lifetime US3412785A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR25962A FR1452172A (fr) 1965-07-26 1965-07-26 Moule de coulée par centrifugation de tuyaux à emboîtement

Publications (1)

Publication Number Publication Date
US3412785A true US3412785A (en) 1968-11-26

Family

ID=8585242

Family Applications (1)

Application Number Title Priority Date Filing Date
US566114A Expired - Lifetime US3412785A (en) 1965-07-26 1966-07-18 Core support for a centrifugal casting mould for casting pipes having a socket, and mould provided with said support

Country Status (7)

Country Link
US (1) US3412785A (enrdf_load_stackoverflow)
BE (1) BE683488A (enrdf_load_stackoverflow)
CH (1) CH461717A (enrdf_load_stackoverflow)
DE (1) DE1290671B (enrdf_load_stackoverflow)
ES (1) ES329643A1 (enrdf_load_stackoverflow)
FR (1) FR1452172A (enrdf_load_stackoverflow)
GB (1) GB1091617A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509938A (en) * 1966-11-17 1970-05-05 Pont A Mousson Support device for positioning and locking a core of a centrifugal casting mould and a core adapted to said device
US3845807A (en) * 1970-04-01 1974-11-05 H Koon Vacuum casting furnace
US3945427A (en) * 1973-09-14 1976-03-23 Boris Samoilovich Milman Installation for producing bimetallic solid bodies of cylindrical shape
US4008751A (en) * 1974-03-21 1977-02-22 Pont-A-Mousson S.A. Casing for a machine for centrifugally casting pipes in a rotary mould
US4074748A (en) * 1975-06-16 1978-02-21 Pont-A-Mousson S.A. Centrifugal casting machine having a device for axially placing and maintaining a core in position
US4078762A (en) * 1974-09-28 1978-03-14 Ali Bindernagel Thin-wall molds for casting elongate ingots
US4129171A (en) * 1975-06-27 1978-12-12 Pont-A-Mousson S.A. Installation for handling socket cores for a centrifugal casting machine
CN120286681A (zh) * 2025-06-11 2025-07-11 靖江市国恒汽配制造有限公司 一种铜铸件高精密锻造模具

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134434B (en) * 1982-12-23 1986-07-16 Shekisan Kogyo Co Ltd Centrifugally moulded concrete products
FR2546428B1 (fr) * 1983-05-27 1985-07-12 Pont A Mousson Dispositif de manutention et de pose d'un noyau d'emboitement pour machine de coulee centrifuge de tuyaux en fonte a emboitement
GB2265098B (en) * 1992-03-21 1994-12-14 Gibson Centri Tech Limited Centrifugal casting machines and apparatus for use therewith

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267815A (en) * 1940-02-02 1941-12-30 Luther M Bush Machine for making tubular objects
US2517317A (en) * 1946-05-21 1950-08-01 Janco Nathan Centrifugal casting machine
US3040395A (en) * 1960-03-18 1962-06-26 Gustin Bacon Mfg Co Mold core loading device improvement
US3074130A (en) * 1959-06-22 1963-01-22 Rheinstahl Eisenwerke Ge Centrifugal casting apparatus
US3168765A (en) * 1962-03-21 1965-02-09 Canada Iron Foundries Ltd Automatic core setters for centrifugal pipe casting machines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE453297C (de) * 1925-12-10 1927-12-02 Internat De Lavaud Mfg Corp Lt Zerlegbarer Kern fuer das Muffenende von Schleudergussformen
DE504420C (de) * 1926-10-05 1930-08-12 Halbergerhuette G M B H Vorrichtung zum Einsetzen und Ausziehen von Muffenkernen fuer Rohre bei Schleudergussmaschinen
DE846279C (de) * 1944-08-06 1952-08-11 Eisenwerke Gelsenkirchen A G Verfahren und Vorrichtung zur Herstellung von Schleudergussstuecken
FR979185A (fr) * 1948-01-21 1951-04-23 Stanton Ironworks Co Ltd Procédé et dispositif de fabrication de corps creux de formes spéciales avec pattes de fixation par moulage centrifuge
FR1063287A (fr) * 1952-07-10 1954-04-30 Appareil pour la mise en place des noyaux de fonderie dans les ? les tuyaux par centrifugation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267815A (en) * 1940-02-02 1941-12-30 Luther M Bush Machine for making tubular objects
US2517317A (en) * 1946-05-21 1950-08-01 Janco Nathan Centrifugal casting machine
US3074130A (en) * 1959-06-22 1963-01-22 Rheinstahl Eisenwerke Ge Centrifugal casting apparatus
US3040395A (en) * 1960-03-18 1962-06-26 Gustin Bacon Mfg Co Mold core loading device improvement
US3168765A (en) * 1962-03-21 1965-02-09 Canada Iron Foundries Ltd Automatic core setters for centrifugal pipe casting machines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509938A (en) * 1966-11-17 1970-05-05 Pont A Mousson Support device for positioning and locking a core of a centrifugal casting mould and a core adapted to said device
US3845807A (en) * 1970-04-01 1974-11-05 H Koon Vacuum casting furnace
US3945427A (en) * 1973-09-14 1976-03-23 Boris Samoilovich Milman Installation for producing bimetallic solid bodies of cylindrical shape
US4008751A (en) * 1974-03-21 1977-02-22 Pont-A-Mousson S.A. Casing for a machine for centrifugally casting pipes in a rotary mould
US4078762A (en) * 1974-09-28 1978-03-14 Ali Bindernagel Thin-wall molds for casting elongate ingots
US4074748A (en) * 1975-06-16 1978-02-21 Pont-A-Mousson S.A. Centrifugal casting machine having a device for axially placing and maintaining a core in position
US4129171A (en) * 1975-06-27 1978-12-12 Pont-A-Mousson S.A. Installation for handling socket cores for a centrifugal casting machine
CN120286681A (zh) * 2025-06-11 2025-07-11 靖江市国恒汽配制造有限公司 一种铜铸件高精密锻造模具

Also Published As

Publication number Publication date
BE683488A (enrdf_load_stackoverflow) 1966-12-01
GB1091617A (en) 1967-11-22
CH461717A (fr) 1968-08-31
ES329643A1 (es) 1967-06-01
FR1452172A (fr) 1966-02-25
DE1290671B (de) 1969-03-13

Similar Documents

Publication Publication Date Title
US3412785A (en) Core support for a centrifugal casting mould for casting pipes having a socket, and mould provided with said support
US2543303A (en) Gyrocasting machine
US3899020A (en) Metal casting mold for centrifugal casting machine
US3612162A (en) Centrifugal casting core support device having pivotal claw means
KR970706930A (ko) 바이메탈 연마휠의 제조방법 및 그에 의해 얻어진 연마휠(method for making a bimetal milling roller, and resulting milling roller)
US2030105A (en) Stop-off for centrifugal casting molds
US2370953A (en) Centrifugal casting machine
US3197827A (en) End core design for use as a closure on centrifugal casting molds
US2601389A (en) Centrifugal casting machine
US2378042A (en) Multiple centrifugal casting
US4901782A (en) Centrifugal casting mold
US3509938A (en) Support device for positioning and locking a core of a centrifugal casting mould and a core adapted to said device
US2771647A (en) Locking means for centrifugal molds
US2745353A (en) Rotor wheel
US2502767A (en) Apparatus for molding castings having deep fins
US3631917A (en) Centrifugal casting mold with free flowing particulate heat transfer means
US3600756A (en) Indexing and brake apparatus for rotational casting machines
US2548464A (en) End dam for centrifugal pipe molds
US2727288A (en) Apparatus for centrifugal casting
US1630043A (en) Centrifugal casting
US3254926A (en) Pillow block
US3327769A (en) Pipe mould
US1623146A (en) Pipe mold for centrifugal casting machines
US2583248A (en) Permanent core
US4074748A (en) Centrifugal casting machine having a device for axially placing and maintaining a core in position