US3899020A - Metal casting mold for centrifugal casting machine - Google Patents

Metal casting mold for centrifugal casting machine Download PDF

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Publication number
US3899020A
US3899020A US279654A US27965472A US3899020A US 3899020 A US3899020 A US 3899020A US 279654 A US279654 A US 279654A US 27965472 A US27965472 A US 27965472A US 3899020 A US3899020 A US 3899020A
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US
United States
Prior art keywords
metal mold
mold member
members
inner metal
end covers
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
US279654A
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English (en)
Inventor
Yasuhiro Sekimoto
Yoshitada Miura
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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
Application filed by Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Application granted granted Critical
Publication of US3899020A publication Critical patent/US3899020A/en
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Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • a metal casting mold of double wall construction to be used for a centrifugal casting machine is made of an inner casting mold member and an outer mold member concentrically fixed thereto with plastically deformable spacing members.
  • the inner mold member is fixed in the outer mold member and interposed between a pair of end covers having on the inner side face thereof a sand mold for absorbing the expansion of the inner mold member in the axial direction.
  • the radial thermal expansion of the inner mold member is absorbed by the spacing member.
  • the end covers are tightly fixed to both ends of the inner mold member by means of pins.
  • This invention relates to a metal mold, and more particularly to a metal mold for use in a centrifugal casting machine.
  • Centrifugal casting is a method of casting wherein molten metal is introduced into a rotating mold and solidified therein.
  • the products made by the centrifugal casting have been limited heretofore to solid columnar articles having small diameter and hollow cylindrical articles having a comparatively thin wall. Since the thermal capacity of the products issmaller than that of the metal mold in these cases, the temperature of the metal mold does not rise as high as that of the products. Therefore, a metal mold of solid construction'has been used without any problems.
  • the object of the present invention is to provide a metal mold for centrifugal casting in which there is generated only a small thermal stress.
  • Another object of the present invention is to provide a metal mold for centrifugal casting which is not subject to vibration when the centrifugal casting machine is operated.
  • Still another object of the present invention is to provide a metal mold for centrifugal casting in which the size of the articles molded thereby can be easily changed.
  • the meta mold in accordance with the present invention comprises an outer mold member and an inner mold member concentrically coupled with each other defining a cylindrical space therebetween whereby the temperature gradient within the metal mold members is reduced by the heat insulating effect of the space. Further, plastically deformable spacing members are inserted between the outer and inner mold members to fix the inner and outer metal mold members together whereby reducing the vibration of the metal mold as well as absorbing thermal expansion of the inner mold member. Besides, since the metal mold is formed in a double wall construction in the present invention, the size of the article can be easily changed by changing the size of the inner mold member and the number of the metal molds to be prepared can be reduced.
  • FIG. 1 is a longitudinal sectional view of a prior art metal mold for centrifugal casting
  • FIG. 2 is a longitudinal sectional view of the metal mold for centrifugal casting in accordance with an embodiment of the present invention.
  • FIG. 3 is an enlarged partial sectional view of the metal mold as shown in FIG. 2.
  • a' metal mold 1 coated on the intemal surface thereof with a coating layer is usually provided at the opposite ends thereof with a pair of end covers 3 carrying a sand mold 2 fixed thereto by means of pins 4 so that the molten metal poured thereinto may not be scattered.
  • the internal temperature of the metal mold unit after the molten metal is poured therein normally rises over 400C, and differs according to the kind of coated material and the thickness thereof.
  • the wall thickness of the metal mold is usually increased in proportion to the thermal capacity of the articles to be molded.
  • the tensile thermal stress generated on the outer surface of the metal mold becomes larger and the load on the pins 4 by the axial thermal expansion on the internal surface of the metal mold increases as well as the thermal distortion of the whole metal mold.
  • the centrifugal forces of the molten metal and the metal mold itself act on the mold unit and accordingly it is necessary to carefully select the strength of the metal mold in comparison with the stationary type metal mold.
  • the metal mold comprises an outer mold member 8 and an inner mold member 5.
  • the inner metal mold member 5 has a flange construction 6 at one end (right hand side) thereof and is provided on the outer periphery thereof with a plurality of plastically deformable spacing members 7 such as of copper alloy having a predetermined height and size and being spaced apart equally around the inner metal mold member 5 at predetermined positions.
  • the inner mold member 5 provided with the spacing member 7 therearound is inserted into an outer mold member 8.
  • a pair of end covers 10 each having a sand mold 9 at its inside face are located at opposite ends of the inner metal mold member 5 and fixed there by means of pins 11.
  • the end covers 10 are only in contact with the outer mold'member 8 and are not in contact with the inner mold member 5. Instead, the sand molds 9 attached to the end covers I0 does contact with the inner mold member.
  • the dimension of the space between the inner and outer metal mold members 5 and 8 should be determined so that the total stress may be smaller than that of the prior art type solid metal mold.
  • the dimensions of the space can be determined by actual measurement and theoretical calculation as shown in the following table:
  • the double wall type casting mold in accordance with the present invention was used to cast large size casting products, there was little vibration of the mold during the casting operation and there was little thermal distortion left after the operation as expected.
  • a number of large size sleeves having wall thickness of not less than 100 mm and diameter of not less than 800 mm were manufactured by use of the casting mold in accordance with the present invention, the quality of the products was excellent and no fractures were found in the mold even after being used more than 50 times.
  • the present invention has a remarkable effect in the sense of safety in large sized centrifugal casting machines.
  • a metal mold assembly of double wall construction adapted to be used for centrifugal casting comprising:
  • an outer metal mold member concentrically provided around said inner metal mold member, said outer and inner metal mold members being concentrically spaced from one another at a dimension for minimizing the total tensile and thermal stresses in said inner and outer metal mold members, wherein said dimension is not less than about 0.13 percent of the outer diameter of said inner metal mold member, and said outer and inner metal mold members being mounted with respect to each other for rotation about an axis concentric to said outer and inner members,
  • each of said end covers having on the inner face thereof a sand mold in direct contact with the opposing axial end of said inner metal mold member, said inner metal mold member being entirely prevented at one axial end from direct contact with said end covers so that axial expansion of said inner metal mold member is absorbed only by said sand mold.
US279654A 1971-08-11 1972-08-09 Metal casting mold for centrifugal casting machine Expired - Lifetime US3899020A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46060321A JPS4949285B2 (sv) 1971-08-11 1971-08-11

Publications (1)

Publication Number Publication Date
US3899020A true US3899020A (en) 1975-08-12

Family

ID=13138776

Family Applications (1)

Application Number Title Priority Date Filing Date
US279654A Expired - Lifetime US3899020A (en) 1971-08-11 1972-08-09 Metal casting mold for centrifugal casting machine

Country Status (6)

Country Link
US (1) US3899020A (sv)
JP (1) JPS4949285B2 (sv)
DE (1) DE2239059B2 (sv)
IT (1) IT964917B (sv)
SE (1) SE387062B (sv)
ZA (1) ZA725431B (sv)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103008599A (zh) * 2012-12-28 2013-04-03 武昌造船厂集团有限公司 一种立式离心机铸型模板化设计方法
CN104550818A (zh) * 2015-01-30 2015-04-29 重庆钢铁(集团)有限责任公司 一种卧式离心铸造装置
US20150246390A1 (en) * 2013-01-10 2015-09-03 Ihi Corporation Centrifugal casting apparatus
CN104907519A (zh) * 2015-06-26 2015-09-16 山东滨州渤海活塞股份有限公司 一种离心铸造镶环组合式模具
CN105834390A (zh) * 2016-06-14 2016-08-10 四川维珍石化设备有限公司 一种采用金属模对离心机环形零部件进行立式离心浇铸的方法
CN106513620A (zh) * 2015-09-15 2017-03-22 现代自动车株式会社 熔融金属浇注装置和使用该装置的离心铸造机
CN107716888A (zh) * 2017-10-25 2018-02-23 四川共享铸造有限公司 一种气缸套的离心铸造方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5072703U (sv) * 1973-11-12 1975-06-26
JPS589268U (ja) * 1981-07-07 1983-01-21 株式会社クボタ 遠心鋳造用金型の構造
JPS62127149A (ja) * 1985-11-26 1987-06-09 Hitachi Metals Ltd 遠心鋳造用組立式二重鋳型
DE19735265C1 (de) * 1997-08-14 1999-01-21 Mecklenburger Metallgus Gmbh Schleudergußkokille
CN108941498B (zh) * 2018-08-17 2024-02-02 镇江汇通金属成型有限公司 用于蜗轮铸造的离心模具

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1549124A (en) * 1923-12-05 1925-08-11 Arens Fernando Method of and apparatus for centrifugal casting
US1573089A (en) * 1924-01-10 1926-02-16 Rice John Mold construction for centrifugal casting machines
US2107322A (en) * 1937-05-03 1938-02-08 Campbell Wyant & Cannon Co Centrifugal casting machine
US2112110A (en) * 1932-03-19 1938-03-22 Mills Alloys Inc Apparatus for making tungsten carbide castings
US2123037A (en) * 1937-06-07 1938-07-05 Frank G Carrington Centrifugal casting machine
US2489322A (en) * 1946-08-28 1949-11-29 Hastings Mfg Co Liner for centrifugal casting molds
US2727288A (en) * 1952-06-13 1955-12-20 Renault Apparatus for centrifugal casting

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1549124A (en) * 1923-12-05 1925-08-11 Arens Fernando Method of and apparatus for centrifugal casting
US1573089A (en) * 1924-01-10 1926-02-16 Rice John Mold construction for centrifugal casting machines
US2112110A (en) * 1932-03-19 1938-03-22 Mills Alloys Inc Apparatus for making tungsten carbide castings
US2107322A (en) * 1937-05-03 1938-02-08 Campbell Wyant & Cannon Co Centrifugal casting machine
US2123037A (en) * 1937-06-07 1938-07-05 Frank G Carrington Centrifugal casting machine
US2489322A (en) * 1946-08-28 1949-11-29 Hastings Mfg Co Liner for centrifugal casting molds
US2727288A (en) * 1952-06-13 1955-12-20 Renault Apparatus for centrifugal casting

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103008599A (zh) * 2012-12-28 2013-04-03 武昌造船厂集团有限公司 一种立式离心机铸型模板化设计方法
CN103008599B (zh) * 2012-12-28 2014-10-15 武昌船舶重工集团有限公司 一种立式离心机铸型模板化设计方法
US20150246390A1 (en) * 2013-01-10 2015-09-03 Ihi Corporation Centrifugal casting apparatus
US9533348B2 (en) * 2013-01-10 2017-01-03 Ihi Corporation Centrifugal casting apparatus
CN104550818A (zh) * 2015-01-30 2015-04-29 重庆钢铁(集团)有限责任公司 一种卧式离心铸造装置
CN104907519A (zh) * 2015-06-26 2015-09-16 山东滨州渤海活塞股份有限公司 一种离心铸造镶环组合式模具
CN106513620A (zh) * 2015-09-15 2017-03-22 现代自动车株式会社 熔融金属浇注装置和使用该装置的离心铸造机
CN105834390A (zh) * 2016-06-14 2016-08-10 四川维珍石化设备有限公司 一种采用金属模对离心机环形零部件进行立式离心浇铸的方法
CN107716888A (zh) * 2017-10-25 2018-02-23 四川共享铸造有限公司 一种气缸套的离心铸造方法

Also Published As

Publication number Publication date
JPS4861326A (sv) 1973-08-28
DE2239059A1 (de) 1973-02-15
SE387062B (sv) 1976-08-30
DE2239059B2 (de) 1974-08-15
DE2239059C3 (sv) 1975-04-03
IT964917B (it) 1974-01-31
JPS4949285B2 (sv) 1974-12-26
ZA725431B (en) 1973-04-25

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