US3612162A - Centrifugal casting core support device having pivotal claw means - Google Patents

Centrifugal casting core support device having pivotal claw means Download PDF

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Publication number
US3612162A
US3612162A US51859A US3612162DA US3612162A US 3612162 A US3612162 A US 3612162A US 51859 A US51859 A US 51859A US 3612162D A US3612162D A US 3612162DA US 3612162 A US3612162 A US 3612162A
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US
United States
Prior art keywords
core
support device
hooking
mould
housing
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
US51859A
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English (en)
Inventor
Michel Pierrel
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.)
Pont a Mousson SA
Centre de Recherches de Pont a Mousson
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Pont a Mousson SA
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Publication date
Application filed by Pont a Mousson SA filed Critical Pont a Mousson SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • 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

Definitions

  • the nonrotating part carries a piston-and-cylinder fluid motor whose piston rod extends through the nonrotating part of the housing and carries at one end a core-seizing device which is capable of engaging the inner face of the core and is rotatable on the piston rod.
  • the core-seizing device comprises spring-biased pivotal claws which are pivoted to the core-engaging position by abutment of heel portions of the claws against the support ring.
  • the present invention relates to moulds for centrifugally casting iron pipes having a socket and more particularly to the support for the core which produces the internal shape of the socket.
  • moulds of this type comprise a core which is adapted to be rapidly placed in position before each casting, perfectly centered in the mould, and capable of rotating at the same speed as the latter, the core being mounted on a support which comprises a core carrier and a nonrotating connecting part or stand.
  • the core is destroyed when the cast pipe is extracted and is therefore replaced after each casting.
  • the core carrier comprises means for centering the core in the mould and locking means for firmlymaintaining the core in position, while the mould rotates at high speed, so as to resist the pressure of the liquid iron.
  • Devices are also known for maintaining the core on a corecarrying head in the form of a locking device having a bayonet arrangement comprising screwheads which project from the head and are engaged in corresponding grooves in the core when the latter is rotated.
  • An object of the invention is to provide a support device for a socket core of a centrifugal casting mould which permits the core to be immediately placed in position by a mere thrust without rotation and its introducing in the centrifugal casting mould.
  • the invention provides an improved support device mounted at the end of a pivotal arm and comprising a housing having a nonrotating part and a rotating part extended by at least one arm which carries at a distance from the housing a support ring constituting a core carrier, wherein the nonrotating part of the housing carries a jack or piston-and-cylinder device whose rod axially extends through said nonrotating part and core-seizing means journaled at the end of said rod for engaging the interior of the core, said means including pivotal claws provided with heels which, by abutment against said support ring, automatically pivot the claws to the corehooking position.
  • FIG. I is a partial diagrammatic sectional view of a centrifugal casting mould equipped with a support according to the invention.
  • FIG. 2 is a diagrammatic longitudinal sectional view of the support device, on an enlarged scale
  • FIG. 3 is an end elevational view of the device shown in FIG. 2;
  • FIG. 4 is a partial view, similar to FIG. 2, of the support device carrying the core in a position spaced away from the mould, and
  • FIG. 5 is a view similar to FIG. 4, the device being in the position for maintaining the core in the mould.
  • the invention is applied to a mould or shell M rotatably mounted inside a fixed case A of a centrifugal casting machine of known type.
  • the mould M comprises,adjacent the socket of the pipe T to be cast, a bell-shaped flared cavity I (FIGS. 1, 4 and 5) in which is placed in POSITION A CORE N which produces the internal shape of the socket of the pipe T.
  • the hell 1 opens to the exterior by way of a frustoconical tapered portion 2 connected to the bell-shaped part of the socket l by a shoulder 3.
  • the core N has a flange 4 adapted to arrest the liquid iron and form the end face in the socket E of the pipe.
  • the periphery of the flange 4 is applied against the annular shoulder 3.
  • the core support device S according to the invention is carried in the known manner (see in particular applicant's French Pat. No. 1,452,172) by an ann B which is carried by a shaft D whose axis is parallel to the axis X-X of the mould.
  • the arm B can be rotated a fraction of a rotation about the axis of the shaft D by a first jack or piston-and-cylinder device V.
  • Another jack or piston-and-cylinder device W causes the shaft D to slide in a direction parallel to the axis X-X so as to shift the arm B toward or away from the mould.
  • the core support device S comprises a nonrotating housing comprising two coaxial sleeves 5 and 6 which are interconnected by flanges 7 and 8, the outer sleeve 5 being fixed to the arm B.
  • the sleeve 9 is rotatably mounted by the thrust bearing 10 and a journal rolling bearing 11 interposed between the sleeves 5 and 9.
  • a ring 13 Fixed to the sleeve 9 is at least one and preferably a plurality of longitudinal arms 12. Rigidly secured to this arm or arms is a ring 13 constituting a core carrier head.
  • the ring 13 has a plane end face 14 and a frustoconical outer face 5 which is complementary to the inner face of the tapered portion 2 of the mould M.
  • a cylinder I6 of a double-acting jack or piston-and-cylinder device Fixed to the flange 8 of the inner sleeve 6 is a cylinder I6 of a double-acting jack or piston-and-cylinder device.
  • the piston rod 17 of the jack extends axially through the assembly comprising the housing and its end located between the sleeve 9 and the ring 13 carries a member 18 which is rotatable and prevented from axial movement on the rod by a screw 19 engaged in an annular groove 20 in the rod (FIG. 2).
  • claws 21 mounted on the lateral faces of the member 18 are claws 21 constituted by cranked levers each of which is pivotable about a pin 22 carried by a lug 23 fixed to the member 18.
  • Each arm 26 carries at its end a screw or pin 27 having a point and adapted to take hold of the core.
  • Each claw comprises a heel 28 which extends radially outwardly a distance sufficient to extend over the rear face 29 of the core carrier ring 13 in axial projection.
  • the device operates in the following manner:
  • the core N is placed in front of an in axial alignment with the ring 15 so that the flange 4 of the core bears against the front face 14 of the ring.
  • the device 16 is supplied with fluid under pressure so as to cause the claws 21 to enter the core N.
  • the heels 28 of these claws abut the rear face 29 of the ring 13 a little before the end of the travel of the rod I7 toward the left (see the positions shown in FIGS. 2 and 4) and these claws 21 are pivoted.
  • the portions 26 of the claws 21 spread apart and the screws 27 engage the inner face of the core N in a region in which the latter is thick and strong.
  • the core is now held in position.
  • the am B then pivots about the axis of the shaft D so as to bring the core support device S on the axis X-X of the mould (FIG. 4).
  • the device W then shifts the assembly of the support S and core N toward the left (compare the positions shown in FIGS. 4 and 5) and drives the ring 13 carrying the core into the tapered portion 2 of the mould M, the flange 4 of the core abutting the shoulder 3 of the mould.
  • the device 16 is once more actuated in the opposite direction so as to withdraw the claws 21 which, under the action of return springs 24, move inwardly and assume an inoperative position of rest.
  • the mould M When the mould M starts to rotate, it drives the assembly consisting of the core N, the ring 13 and the sleeve 9 (the core N is in close contact with the mould M through the circular shoulder 3) and the ring 13 continues to urge the flange 4 against the shoulder 3 and the sleeve 9 is driven by the arms 12.
  • the device W shifts the device S away from the mould and the arm B pivots in such manner as to become withdrawn from the axis X-X of the mould M.
  • the pipe can now be extracted and the device S is ready to receive a core for the following pipe-casting operation.
  • the inner claws 21 result in a very rapid and ready positioning of the core N on its support and a reliable gripping and introduction of the core into the mould M.
  • these claws can rotate with the core N. This enables the core to be inserted with no loss of time, even if the mould M is rotating.
  • Another advantage of the invention resides in the fact that the screws 27 engage internally on the core N in a strong part of its wall so that there is no danger of harming the core, even if it is fragile, such as when it is of sand.
  • a support device fora socket core of a centrifugal casting mould said device being mounted on an end of a pivotal arm and comprising a housing having a nonrotating part and a rotating part, at least one branch extending said rotating part and carrying at a distance from said housing a support ring constituting a carrier for said core, said nonrotating part of said housing carrying a fluid motor having a slidable member responsive to fluid pressure in said motor, said member extending through said nonrotating part, and core-seizing means journaled on said member adjacent one end of said member for engaging the interior of the core, said core-seizing means including pivotal claw means for hooking said core and having heel portions which are capable of abutting said support ring and automatically pivoting said claw means to a core-hooking position when said slidable member is shifted toward said support ring by said fluid pressure.
  • each claw means comprising a cranked lever which is pivoted to said claw means carrier and has a first branch carrying a hooking member for hooking the inner face of the core and a second branch extending outwardly in a substantially radial direction relative to said mould and having such length that it is capable of encountering said support ring and constituting said heel portion.
  • a support device wherein resiliently yieldable means are interposed between each of said levers and said claw means carrier so as to bias said hooking members in a direction away from said inner face of said core.
  • a support device as claimed in claim 2, wherein said hooking member carried by each cranked lever is an adjustable screw having a pointed end capable of engaging said inner face of said core.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)
US51859A 1969-07-03 1970-07-02 Centrifugal casting core support device having pivotal claw means Expired - Lifetime US3612162A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6922530A FR2051993A5 (US20080094685A1-20080424-C00004.png) 1969-07-03 1969-07-03

Publications (1)

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US3612162A true US3612162A (en) 1971-10-12

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US51859A Expired - Lifetime US3612162A (en) 1969-07-03 1970-07-02 Centrifugal casting core support device having pivotal claw means

Country Status (9)

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US (1) US3612162A (US20080094685A1-20080424-C00004.png)
CH (1) CH525733A (US20080094685A1-20080424-C00004.png)
DE (1) DE2030356B2 (US20080094685A1-20080424-C00004.png)
ES (2) ES381867A1 (US20080094685A1-20080424-C00004.png)
FR (1) FR2051993A5 (US20080094685A1-20080424-C00004.png)
GB (1) GB1250600A (US20080094685A1-20080424-C00004.png)
PL (1) PL81267B1 (US20080094685A1-20080424-C00004.png)
SE (1) SE361273B (US20080094685A1-20080424-C00004.png)
SU (1) SU365057A3 (US20080094685A1-20080424-C00004.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4611650A (en) * 1983-05-11 1986-09-16 Pont-A-Mousson S.A. Socket core support device for centrifugal pipe casting machine
US4719958A (en) * 1986-01-14 1988-01-19 Foseco International Ltd. Method, apparatus and feeder sleeves for the production of casting moulds
US6425436B1 (en) * 2000-06-16 2002-07-30 Amsted Industries Incorporated Sand core breaking apparatus
CN115264064A (zh) * 2022-07-04 2022-11-01 陕西华通机电制造有限公司 一种用于高压铜铸的支撑装置及支撑方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322181A1 (de) * 1993-06-29 1995-01-12 Hottinger Adolf Masch Vorrichtung und Verfahren zum Greifen eines Gießereikerns, insbesondere eines Sohlenkerns
CN110921534B (zh) * 2019-12-03 2021-09-28 抚州市海利金属科技有限公司 一种地面建筑用钢管抓取提升装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1092613A (fr) * 1952-11-10 1955-04-25 Tiroler Roehren & Metallwerk Agencement de moules pour la coulée centrifuge
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1092613A (fr) * 1952-11-10 1955-04-25 Tiroler Roehren & Metallwerk Agencement de moules pour la coulée centrifuge
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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4611650A (en) * 1983-05-11 1986-09-16 Pont-A-Mousson S.A. Socket core support device for centrifugal pipe casting machine
US4719958A (en) * 1986-01-14 1988-01-19 Foseco International Ltd. Method, apparatus and feeder sleeves for the production of casting moulds
AU594111B2 (en) * 1986-01-14 1990-03-01 Foseco International Limited Method, apparatus and feeder sleeves for the production of casting moulds
US6425436B1 (en) * 2000-06-16 2002-07-30 Amsted Industries Incorporated Sand core breaking apparatus
CN115264064A (zh) * 2022-07-04 2022-11-01 陕西华通机电制造有限公司 一种用于高压铜铸的支撑装置及支撑方法

Also Published As

Publication number Publication date
DE2030356A1 (US20080094685A1-20080424-C00004.png) 1971-03-11
DE2030356B2 (de) 1971-03-11
PL81267B1 (US20080094685A1-20080424-C00004.png) 1975-08-30
SE361273B (US20080094685A1-20080424-C00004.png) 1973-10-29
ES381867A1 (es) 1972-11-16
CH525733A (fr) 1972-07-31
FR2051993A5 (US20080094685A1-20080424-C00004.png) 1971-04-09
ES381866A1 (es) 1972-11-16
GB1250600A (US20080094685A1-20080424-C00004.png) 1971-10-20
SU365057A3 (US20080094685A1-20080424-C00004.png) 1972-12-28

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SU365057A1 (ru) СССРОпубликовано 28.XII.1972. Бюллетень № 5за 1973 Дата опубликовани описани 23.11.1973УДК 621.74.042:621.881 (088.8)