US3888301A - Multi-part mold clamp - Google Patents

Multi-part mold clamp Download PDF

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Publication number
US3888301A
US3888301A US477534A US47753474A US3888301A US 3888301 A US3888301 A US 3888301A US 477534 A US477534 A US 477534A US 47753474 A US47753474 A US 47753474A US 3888301 A US3888301 A US 3888301A
Authority
US
United States
Prior art keywords
mold
plate
slot
parts
chill
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
US477534A
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English (en)
Inventor
Douglas R Hayes
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.)
RTX Corp
Original Assignee
United Aircraft Corp
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 United Aircraft Corp filed Critical United Aircraft Corp
Priority to US477534A priority Critical patent/US3888301A/en
Priority to CA220,114A priority patent/CA1062873A/en
Priority to GB21906/75A priority patent/GB1504154A/en
Priority to DE2522691A priority patent/DE2522691C2/de
Priority to FR7516914A priority patent/FR2273611A1/fr
Priority to JP6904475A priority patent/JPS5715990B2/ja
Application granted granted Critical
Publication of US3888301A publication Critical patent/US3888301A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B22D27/045—Directionally solidified castings

Definitions

  • the several parts of the mold are held together in proper relation to each other by the same device that serves to hold the mold on the chill plate during the casting process.
  • the hold-down is a heavy plate that has one or more slots therein, each slot accepting a multi-part mold therein and by engagement with opposite sides of the mold holding the several parts in secure operative position.
  • the same plate by engaging with the holddown flanges on the mold parts, position the assembled mold structure securely against the chill plate on which the mold is positioned and which serves to begin the columnar growth in the alloy as it solidifies.
  • FIG. 1 is a elevational view of a plurality of molds held on a chill plate by the hold-down plate.
  • FIG. 2 is a sectional view along line 22 of FIG. 1
  • FIG. 3 is a sectional view on a larger scale of the mold and slot of FIG. 2.
  • FIG. 4 is a sectional view on a larger scale of a modifled form of mold.
  • the device is shown being used to hold a plurality of molds 12 in vertical position on a chill plate 14.
  • the device is in the form of a heavy plate and rests on bottom flanges l6 and 18 on the opposed mating parts and 22 of each mold.
  • the parts 20 and 22 are preformed or molded to mate with each other as described in the above-identified application Ser. No. 4l6,563 and each part has the bottom flange 16 or 18 which rests on the chill plate.
  • the casting cavity of the mold is open to the chill plate and the bottom of the mold as well as the flanges must make a fluid tight connection with the chill plate to prevent leakage of molten alloy.
  • the mold parts 20 and 22 have edge mating flanges 23 and 24, FIG. 3 which serve to hold the mold portions in proper relation to one another.
  • the device is shown as holding a plurality of these multi-part molds in position so that all the molds may be filled with molten alloy at one time for the simultaneous production of several articles.
  • the part being cast by way of example is a turbine blade that has a root portion formed in the enlarged portion 25 of the mold adjacent the bottom end, with an airfoil portion 26 extending upwardly from the root.
  • the root is substantially rectangular in cross section and thus the mold parts in this root area may have outer flat surfaces 27 for engagement with the opposite walls 28 and 30 of a mold-receiving slot 32 in the plate or device 10.
  • the plate 10 has, as shown, a plurality of such slots around the periphery, one for each assem bled mold, although it will be understood that such a plate could serve for holding a single mold is desired.
  • the plate 10 rests on the bottom flanges l6 and 18 of the mold and thus hold the open bottom of the mold securely against the chill plate.
  • this hold-down plate Prior to the use of this hold-down plate the one-piece shell molds were held on the chill plate by hold down clamps that tended to concentrate stresses on the mold in the areas of the clamps thus frequently causing cracking ofthe mold with resultant leakage of the alloy.
  • This plate distributes the hold-down pressure evenly around the periphery of the mold and on the peripheral flanges with much less possibility of mold damage.
  • Each multi-part mold may be held together at the top as by the filler cup 34 that fits over the top ends of the mold parts.
  • the mold may have more than two parts as shown in FIG. 2.
  • the blade or other article being cast is made in two parts in the cavities 42 and 44, and these two parts are later suitably bonded together in making the finished article.
  • the opposed side walls 28 and 30' of the slot 32' in the plate I0 engage flat surfaces 46 and 48 formed for this purpose on the opposed mold sides 38 and 40 in the root portion.
  • the slot is made of the appropriate width to receive the assembled mold slidably therein.
  • the several assembled molds are positioned in the respective slots in the hold down plate with the plate in engagement with the top surfaces of the peripheral flanges and with the molds resting on the chill plate.
  • the assembly shown is placed in a vacuum chamber to heat the mold assembly to a temperature above the melting point of the alloy.
  • the molten alloy, with a few hundred degrees of preheat is then poured into the molds and the solidification process is carried out as described in either VerSnyder US. Pat. No. 3,260,505. to produce the usual columnar grain, or as in Piearcey US. Pat. No. 3,494,707 which produces a single crystal crystal, a particular type of columnar grain.
  • Such molds are also usable in casting the socalled eutectics as in Ge]! US. Pat. No. 3,567,526 which also have a columnar grain structure.
  • a plate for holding at least one multi-part mold in casting position on a chill plate having a plurality of mold parts adapted to be mated together in assembled relation and a peripheral flange on said mold parts at one end, said plate having a slot therein to receive the multi-part mold slidably therein, the slot being substantially equal in width to the thickness of the mold fitting in the slot, the multi-part mold being positioned in the plate with the peripheral flanges against one surface of the plate and with the plate located above and substantially parallel to the chill plate with the peripheral flanges therebetween.
  • a plate as in claim 5 in which the plate has a plurality of radial slots therein, each receiving an assembled multi-part mold for the simultaneous casting of a plurality of articles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US477534A 1974-06-07 1974-06-07 Multi-part mold clamp Expired - Lifetime US3888301A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US477534A US3888301A (en) 1974-06-07 1974-06-07 Multi-part mold clamp
CA220,114A CA1062873A (en) 1974-06-07 1975-02-14 Multi-part mold clamp
GB21906/75A GB1504154A (en) 1974-06-07 1975-05-21 Casting apparatus
DE2522691A DE2522691C2 (de) 1974-06-07 1975-05-22 Haltevorrichtung für mehrteilige Gießformen
FR7516914A FR2273611A1 (fr) 1974-06-07 1975-05-30 Dispositif de serrage pour assembler les pieces multiples d'un moule
JP6904475A JPS5715990B2 (enrdf_load_stackoverflow) 1974-06-07 1975-06-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US477534A US3888301A (en) 1974-06-07 1974-06-07 Multi-part mold clamp

Publications (1)

Publication Number Publication Date
US3888301A true US3888301A (en) 1975-06-10

Family

ID=23896318

Family Applications (1)

Application Number Title Priority Date Filing Date
US477534A Expired - Lifetime US3888301A (en) 1974-06-07 1974-06-07 Multi-part mold clamp

Country Status (6)

Country Link
US (1) US3888301A (enrdf_load_stackoverflow)
JP (1) JPS5715990B2 (enrdf_load_stackoverflow)
CA (1) CA1062873A (enrdf_load_stackoverflow)
DE (1) DE2522691C2 (enrdf_load_stackoverflow)
FR (1) FR2273611A1 (enrdf_load_stackoverflow)
GB (1) GB1504154A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062468A (en) * 1989-07-19 1991-11-05 Pcc Airfoils, Inc. Mold and method for casting a single crystal metal article
US5899257A (en) * 1982-09-28 1999-05-04 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Process for the fabrication of monocrystalline castings
CN103909254A (zh) * 2014-04-04 2014-07-09 含山县荣盛机械铸造有限公司 一种铸造浇注装置
CN103909255A (zh) * 2014-04-04 2014-07-09 含山县荣盛机械铸造有限公司 一种多种模具铸造系统
CN104841917A (zh) * 2014-02-17 2015-08-19 兴化市阳光汽配厂 一种模具用浇铸架

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3744982A (en) * 1971-05-20 1973-07-10 Gen Electric Method of making boron-alloyed diamond compacts and beryllium-alloyed cubic boron nitride compacts
CA1231828A (en) * 1983-03-30 1988-01-26 Lien N. Parrish Aluminum-resistant titanium diboride articles and method of making same
JPS61101679U (enrdf_load_stackoverflow) * 1984-12-10 1986-06-28

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714977A (en) * 1971-07-23 1973-02-06 United Aircraft Corp Method and apparatus for the production of directionally solidified castings
US3752221A (en) * 1969-10-30 1973-08-14 United Aircraft Corp Mold apparatus for casting with downward unidirectional solidification
US3802482A (en) * 1972-03-09 1974-04-09 United Aircraft Corp Process for making directionally solidified castings
US3810504A (en) * 1971-03-26 1974-05-14 Trw Inc Method for directional solidification

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752221A (en) * 1969-10-30 1973-08-14 United Aircraft Corp Mold apparatus for casting with downward unidirectional solidification
US3810504A (en) * 1971-03-26 1974-05-14 Trw Inc Method for directional solidification
US3714977A (en) * 1971-07-23 1973-02-06 United Aircraft Corp Method and apparatus for the production of directionally solidified castings
US3802482A (en) * 1972-03-09 1974-04-09 United Aircraft Corp Process for making directionally solidified castings

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5899257A (en) * 1982-09-28 1999-05-04 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Process for the fabrication of monocrystalline castings
US5062468A (en) * 1989-07-19 1991-11-05 Pcc Airfoils, Inc. Mold and method for casting a single crystal metal article
CN104841917A (zh) * 2014-02-17 2015-08-19 兴化市阳光汽配厂 一种模具用浇铸架
CN103909254A (zh) * 2014-04-04 2014-07-09 含山县荣盛机械铸造有限公司 一种铸造浇注装置
CN103909255A (zh) * 2014-04-04 2014-07-09 含山县荣盛机械铸造有限公司 一种多种模具铸造系统

Also Published As

Publication number Publication date
DE2522691A1 (de) 1975-12-18
FR2273611A1 (fr) 1976-01-02
CA1062873A (en) 1979-09-25
DE2522691C2 (de) 1982-08-26
GB1504154A (en) 1978-03-15
FR2273611B1 (enrdf_load_stackoverflow) 1978-10-20
JPS5715990B2 (enrdf_load_stackoverflow) 1982-04-02
JPS518122A (enrdf_load_stackoverflow) 1976-01-22

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