US3844337A - Pouring sprue - Google Patents

Pouring sprue Download PDF

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Publication number
US3844337A
US3844337A US00315864A US31586472A US3844337A US 3844337 A US3844337 A US 3844337A US 00315864 A US00315864 A US 00315864A US 31586472 A US31586472 A US 31586472A US 3844337 A US3844337 A US 3844337A
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US
United States
Prior art keywords
sections
sprue
section
elongated
complemental
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
US00315864A
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English (en)
Inventor
C Bessett
J Boyd
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.)
Packaging Corp of America
Original Assignee
Packaging Corp of America
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 Packaging Corp of America filed Critical Packaging Corp of America
Priority to US00315864A priority Critical patent/US3844337A/en
Priority to CA177,939A priority patent/CA994983A/en
Priority to GB3697273A priority patent/GB1399683A/en
Priority to JP48096771A priority patent/JPS4990221A/ja
Priority to IT28390/73A priority patent/IT993838B/it
Priority to FR7335148A priority patent/FR2210465B3/fr
Priority to DE2362973A priority patent/DE2362973A1/de
Application granted granted Critical
Publication of US3844337A publication Critical patent/US3844337A/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
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/082—Sprues, pouring cups

Definitions

  • the sprue is of unitary construction and is capable of disintegrating when subjected to a predetermined temperature for a finite period of time without an undesirable residue being formed. Prior to being used, the sprue may be readily nested with sprues of like configuration so as to form a compact stack for storage or shipment.
  • the sprue includes a pair of elongated complemental sections which are integrally connected along one elongated side and foldable relative to one another to a closed position forming a funnel member.
  • the opposite elongated side of each section is provided with complemental locking means.
  • the complemental locking means of the sections interlock with one another and retain the sections in closed relation.
  • the interlocked elongated sides of the sections are provided with seal means which form a sealed joint between the interlocked sections.
  • an initial casting or form of the desired prodnet is made from expanded polystyrene beads or the like whereby the configuration thereof simulates that of the desired product.
  • a circular projection is provided which is adapted to extend upwardly and receive one end of a pouring sprue.
  • a pouring sprue was customarily made of a suitable core sand mixture.
  • a pouring sprue of unitary construction which includes a pair of elongated sections foldably connected along one side, and when folded to a closed position forming a funnel member.
  • Complemental locking means are carried by the edges of the sections opposite the connected edges and are adapted to interlock with one another so as to retain the sections in closed position.
  • Each section is provided with a seal means which coacts with the other when the sections are closed and forms a sealed joint between the sections.
  • FIG. 1 is a perspective view of one form of the improved pouring sprue shown in set up condition
  • FIG. 2 is a right side elevational view of the pouring sprue of FIG. I, but shown in an inverted position;
  • FIG. 3 is a top view of the pouring sprue shown in FIG. 1;
  • FIG. 4 is similar to FIG. 3 but showing the pouring sprue in a fully unfolded condition, ready for nesting with other sprues of like configuration;
  • FIG. 5 is a perspective view of the pouring sprue of FIG. 1 shown in a partially set up condition
  • FIG. 6 is a plan view of the pouring sprue of FIG. 1 shown as it would be removed from a forming mold;
  • FIG. 7 is a fragmentary view, similar to'FIG. 6, but on a reduced scale, of a second form of the improved pouring sprue.
  • FIG. 8 is an enlarged fragmentary edge view of the locking means of the pouring sprue of FIG. 7, and showing the sections thereof in interlocking relation.
  • an improved pouring sprue 10 which is adapted to be used in a variety of foundry operations, such as in a closed mold process.
  • an initial, or temporary casting of the desired product is made from a material such as expanded polystyrene beads.
  • the initial casting is normally provided with an upwardly extending projection which is adapted to be accommodated by one end of the pouring sprue.
  • the initial casting and the accommodated sprue are then held in place by compacted foundry sand. Molten metal is poured through the sprue and, as it contacts the expanded polystyrene beads, it will cause same to melt and then evaporate.
  • the void resulting from the disintegration of the initial casting is replaced by the molten metal. While the molten metal is solidifying, the heat generated thereby will cause the improved sprue to disintegrate leaving little or no residue which will contaminate the foundry sand.
  • sprues used in the closed mold process were formed of a core sand mixture, and did not disintegrate, but instead, were broken up at the time the metal casting was removed from the compacted foundry sand.
  • the sprue was broken, particles thereof became intermixed with the foundry sand and caused contamination thereof.
  • the contaminated foundry sand had to be discarded, or the contaminant removed before the sand could be reused. Performing such an operation on the foundry sand was awkward, time-consuming, and costly.
  • the improved sprue 10 shown in the drawings is preferably formed of molded paper pulp and is of a unitary construction.
  • the sprue 10 comprises a pair of elongated sections 11 and 12 which are normally of substantially like configuration. Each section has one elongated side thereof lla or 12a in the form of a lateral flange connected to the other section by a foldline 13. When the sections are folded to a closed position, the pouring sprue 10 is set up, see FIGS. 1 and 2.
  • each section is also in the form of a lateral peripheral flange, and is provided with complemental locking means 14 which will be described more fully hereinafter.
  • Each section 11 or 12, as aforementioned, is normally of substantially the same configuration, and includes a recessed, elongated central portion 110 or 120 which extends the full length of each section.
  • the central portion is of tapered concave configuration with one end thereof of greater dimension.
  • the one end combines with the corresponding end of the other section so as to form the upper inlet end A of the sprue.
  • the opposite, or smaller, end of the central portion in a like manner combines with the corresponding smaller end of the other section so as to form the lower outlet end B of the sprue.
  • the lower end B of the sprue is dimensioned so as to accommodate the upwardly extending projection formed on the initial casting, not shown.
  • the configuration of the central portion of each section may vary from that shown if desired.
  • the complemental locking means 14 shown in FIGS. 1-6 includes a plurality of longitudinally spaced, substantially wedge-shaped tabs 14a which are formed in and extend laterally from the side 12b of section 12. Corresponding slots l4b are formed in the side 11b of section 11. The dimension of the slots 14b is such that only the narrow neck portions 140 of the tabs will fit therein. Once the tab has fit into the corresponding slot, the inherent fight back plus the stiffness of the molded pulp material of which the sprue is made, will cause the sections to remain effectively interlocked.
  • Locking means 114 includes a first set of slits 114a formed on side 12b of section 12. The slits are longitudinally spaced and extend obliquely outwardly towards the inlet end A of the sprue. A second set of longitudinally spaced slits l14b is formed on side llb of section 11 and each slit ll4b extends transversely outwardly.
  • the sets of slits 114a and b interlock with one another so that an edge portion 114C adjacent each slit 114a will overlap an edge portion 114d adjacent each slit 1.1412, see FIG. 8.
  • the sprue sections will be urged into closed relation by the compacted foundry sand surrounding same.
  • seal means 15 is shown in the drawings for effecting the desired sealed joint between the interlocked sides of the sections.
  • Seal means 15 includes an elongated continuous bead la which is formed on the side 12b of the section 12 inwardly of the tabs 14a or slits 114a. The bead extends the full length of the side and is adapted to snugly fit within an elongated groove 15b formed on the side 11b of section 11, see FIGS. 3 and 4.
  • each complemental section 11 or 12 is provided with an elongated, longitudinally extending protuberance 11d or 12d.
  • Each protuberance projects inwardly towards the axis of the funnel member when the latter is set up to receive the molten metal.
  • the protuberances 11d and 12d are substantially diametrically opposed to one another and serve to prevent the molten metal from spinning or swirling as it is being poured through the funnel member. It has been found if such spinning or swirling motion occurs, undesirable foreign materials are drawn into the mold thereby resulting in an unsound casting.
  • pouring sprues shown in FIGS. 6 and 7 include a pair of diametrically opposed protuberances, it is to be understood, of course, that the number of protuberances may be increased or decreased and the location thereof may be varied from that shown without departing from the scope of the invention.
  • the sprue 11 is preferably formed of molded pulp or a similar inexpensive material.
  • the sprue 11, when removed from the forming dies, is in a fully open or unfolded condition, as seen in FIG. 6.
  • end pieces X and Y are included at opposite ends of the sections.
  • each end piece Prior to the complemental sections being folded so as to form the sprue, each end piece is separated from the remainder of the sections along weakened scorelines I and II.
  • the scorelines I and II define the upper and lower limits, respectively, of the sprue 10 when it is set up.
  • molded pulp as the material for making the sprue is desirable for numerous reasons.
  • the molded pulp is capable of permitting the escape therethrough of the gases generated within the mold during the pouring operation.
  • the molded pulp is inexpensive, lightweight, and because of its inherent stiffness, can be readily manipulated into set up condition and placed in accommodating position with a portion of the initial casting.
  • the improved sprue is of unitary, non-fragile construction, and when not in use, can be readily nested with other sprues of like construction so as to form a compact stack suitable for storage or bulk shipment to the ultimate user. No special tools or dexterous talents are required for setting up the sprue or for effecting interlocking of the sprue sections in a closed relation.
  • a pouring sprue of unitary construction for molten metal or the like comprising a pair of elongated complemental sections, each section having a recessed center portion and an elongated first side portion extending from said center portion and being integral with and foldably connected to a corresponding elongated first side portion of the other section, said sections, when folded to a closed position having the center portions thereof forming an elongated funnel having an inlet opening at one end and an outlet opening at the opposite end; complemental locking means on corresponding elongated second side portions of said sections and adapted to lock said sections in said closed position, the first and second side portions of a section being separated by the center portion thereof; and seal means formed on said sections adjacent said complemental locking means and extending longitudinally of said sections and effecting a continuous sealed joint between the elongated side portions of said sections when the latter are locked in said closed position, said sealed joint extending substantially the entire length of said funnel.
  • seal means includes an elongated male portion formed on one section and disposed adjacent to and coextensive with the juncture of the second side portion and the center portion of the one section, and an elongated female portion formed on the other section and disposed adjacent to and coextensive with the juncture of the second sideportion and the center portion of the other section, said male and female portions form a sealed joint located intermediate the complemental locking means and the funnel.
  • each locking tab is of substantial wedge configuration and having a narrow neck portion connected to the second side portion of one section, and each slot of the other section is dimensioned to accommodate only the narrow neck portion of a corresponding tab when said sections are in a closed position.
  • the complemental locking means formed on one section comprises a first set of longitudinally spaced open end first slits, each slit of the first set extending obliquely outwardly, and the complemental locking means formed on the other section comprises a second set of longitudinally spaced open end slits, each slit of the second set extending outwardly at a different angle than that of said first sets of slits whereby the first and second sets of slits interengage each other in interlocking relation and retain said sprue sections in a closed position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
US00315864A 1972-12-18 1972-12-18 Pouring sprue Expired - Lifetime US3844337A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00315864A US3844337A (en) 1972-12-18 1972-12-18 Pouring sprue
CA177,939A CA994983A (en) 1972-12-18 1973-08-01 Pouring sprue
GB3697273A GB1399683A (en) 1972-12-18 1973-08-03 Pouring sprue
JP48096771A JPS4990221A (enrdf_load_stackoverflow) 1972-12-18 1973-08-30
IT28390/73A IT993838B (it) 1972-12-18 1973-08-30 Canale di colata
FR7335148A FR2210465B3 (enrdf_load_stackoverflow) 1972-12-18 1973-10-02
DE2362973A DE2362973A1 (de) 1972-12-18 1973-12-18 Giesstrichter fuer fluessiges metall oder dergl. zum einsetzen in eine giessform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00315864A US3844337A (en) 1972-12-18 1972-12-18 Pouring sprue

Publications (1)

Publication Number Publication Date
US3844337A true US3844337A (en) 1974-10-29

Family

ID=23226385

Family Applications (1)

Application Number Title Priority Date Filing Date
US00315864A Expired - Lifetime US3844337A (en) 1972-12-18 1972-12-18 Pouring sprue

Country Status (7)

Country Link
US (1) US3844337A (enrdf_load_stackoverflow)
JP (1) JPS4990221A (enrdf_load_stackoverflow)
CA (1) CA994983A (enrdf_load_stackoverflow)
DE (1) DE2362973A1 (enrdf_load_stackoverflow)
FR (1) FR2210465B3 (enrdf_load_stackoverflow)
GB (1) GB1399683A (enrdf_load_stackoverflow)
IT (1) IT993838B (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060121A (en) * 1976-07-06 1977-11-29 Bada Company, Inc. Sprue removal mechanism for die casting apparatus
US4205721A (en) * 1977-03-23 1980-06-03 Georg Fischer Aktiengesellschaft Apparatus for filling a casting mold
US4598757A (en) * 1984-07-26 1986-07-08 Outboard Marine Corporation Bonded sand sprue cup
WO1986006943A1 (en) * 1985-05-30 1986-12-04 Bogusz Walter F Dish washing aid device
US4698861A (en) * 1985-05-30 1987-10-13 Bogusz Edward F Dish washing aid device
US4751751A (en) * 1986-07-21 1988-06-21 Reno Richard C Disposable urinating funnel for females
US5205340A (en) * 1989-06-27 1993-04-27 Brown Foundry System, Inc. Insulated paper sleeve for casting metal articles in sand molds
US5207425A (en) * 1990-06-04 1993-05-04 Cohrs Kenneth O Device for handling game pieces
USD363943S (en) 1993-12-27 1995-11-07 John Hendrickson Concrete form splash funnel
EP1031391A1 (en) * 1999-02-22 2000-08-30 Howmet Research Corporation Anti-swirl mold pour cup and casting method
US20040069429A1 (en) * 2002-03-13 2004-04-15 Tokuo Tsuura Part prepared through sheet-making process for use in producing castings and method for preparation tyhereof
EP1577034A4 (en) * 2002-11-13 2005-12-21 Kao Corp MEMBER FOR THE PRODUCTION OF CASTORS
EP2017022A1 (de) * 2007-07-20 2009-01-21 Hagenburger Von einer Metallschmelze durchströmbares Bauteil eines Gießsystems
US20090211717A1 (en) * 2005-11-30 2009-08-27 Kao Corporation Part for Producing Castings and Process of Making the Same
CN101099991B (zh) * 2006-07-03 2010-05-12 浙江哈勃电子科技有限公司 用于卧式铸造的金属模具
JP2012101256A (ja) * 2010-11-11 2012-05-31 Honda Motor Co Ltd 成型用鋳型
US20150258608A1 (en) * 2012-10-24 2015-09-17 United Technologies Corporation Casting funnel
CN104942229A (zh) * 2015-06-19 2015-09-30 山西平阳重工机械有限责任公司 一种高性能消失模铸钢件铸造方法
US10040598B2 (en) * 2013-08-21 2018-08-07 Bellfig Creative, LLC Foldable structures
US20180345363A1 (en) * 2017-06-06 2018-12-06 Schaefer Industries, Inc. Interlocking refractory gating system for steel casting
CN110238351A (zh) * 2019-07-22 2019-09-17 义乌约德新材料有限公司 一种超薄型活塞模具浇道

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5343621A (en) * 1976-10-04 1978-04-19 Asahi Shiyouji Kk Sprue void
JPS5754908Y2 (enrdf_load_stackoverflow) * 1978-12-27 1982-11-27

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1337256A (en) * 1920-01-06 1920-04-20 Thomas J O'connell Device for pouring joints
US2269455A (en) * 1940-02-17 1942-01-13 Castings Patent Corp Mold and sprue sleeve therefor
US3177528A (en) * 1963-05-09 1965-04-13 Archibald T Flower Mold for applying electrically insulated coating to pipe fittings
DE1239437B (de) * 1965-02-13 1967-04-27 Gruenzweig & Hartmann Verfahren zur Herstellung von Giessformen und verlorenes Modell zu seiner Durchfuehrung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1337256A (en) * 1920-01-06 1920-04-20 Thomas J O'connell Device for pouring joints
US2269455A (en) * 1940-02-17 1942-01-13 Castings Patent Corp Mold and sprue sleeve therefor
US3177528A (en) * 1963-05-09 1965-04-13 Archibald T Flower Mold for applying electrically insulated coating to pipe fittings
DE1239437B (de) * 1965-02-13 1967-04-27 Gruenzweig & Hartmann Verfahren zur Herstellung von Giessformen und verlorenes Modell zu seiner Durchfuehrung

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060121A (en) * 1976-07-06 1977-11-29 Bada Company, Inc. Sprue removal mechanism for die casting apparatus
US4205721A (en) * 1977-03-23 1980-06-03 Georg Fischer Aktiengesellschaft Apparatus for filling a casting mold
US4598757A (en) * 1984-07-26 1986-07-08 Outboard Marine Corporation Bonded sand sprue cup
WO1986006943A1 (en) * 1985-05-30 1986-12-04 Bogusz Walter F Dish washing aid device
US4698861A (en) * 1985-05-30 1987-10-13 Bogusz Edward F Dish washing aid device
US4751751A (en) * 1986-07-21 1988-06-21 Reno Richard C Disposable urinating funnel for females
US5205340A (en) * 1989-06-27 1993-04-27 Brown Foundry System, Inc. Insulated paper sleeve for casting metal articles in sand molds
US5207425A (en) * 1990-06-04 1993-05-04 Cohrs Kenneth O Device for handling game pieces
USD363943S (en) 1993-12-27 1995-11-07 John Hendrickson Concrete form splash funnel
EP1031391A1 (en) * 1999-02-22 2000-08-30 Howmet Research Corporation Anti-swirl mold pour cup and casting method
US20040069429A1 (en) * 2002-03-13 2004-04-15 Tokuo Tsuura Part prepared through sheet-making process for use in producing castings and method for preparation tyhereof
US7815774B2 (en) 2002-03-13 2010-10-19 Kao Corporation Elements made by paper-making technique for the production of molded articles and production method thereof
US20060130987A1 (en) * 2002-11-13 2006-06-22 Kao Corporation Member for producing castings
US7503999B2 (en) 2002-11-13 2009-03-17 Kao Corporation Member for producing castings
EP1577034A4 (en) * 2002-11-13 2005-12-21 Kao Corp MEMBER FOR THE PRODUCTION OF CASTORS
US20090211717A1 (en) * 2005-11-30 2009-08-27 Kao Corporation Part for Producing Castings and Process of Making the Same
CN101099991B (zh) * 2006-07-03 2010-05-12 浙江哈勃电子科技有限公司 用于卧式铸造的金属模具
EP2017022A1 (de) * 2007-07-20 2009-01-21 Hagenburger Von einer Metallschmelze durchströmbares Bauteil eines Gießsystems
JP2012101256A (ja) * 2010-11-11 2012-05-31 Honda Motor Co Ltd 成型用鋳型
US20150258608A1 (en) * 2012-10-24 2015-09-17 United Technologies Corporation Casting funnel
US10518322B2 (en) * 2012-10-24 2019-12-31 United Technologies Corporation Casting funnel
US10040598B2 (en) * 2013-08-21 2018-08-07 Bellfig Creative, LLC Foldable structures
CN104942229A (zh) * 2015-06-19 2015-09-30 山西平阳重工机械有限责任公司 一种高性能消失模铸钢件铸造方法
US20180345363A1 (en) * 2017-06-06 2018-12-06 Schaefer Industries, Inc. Interlocking refractory gating system for steel casting
CN110238351A (zh) * 2019-07-22 2019-09-17 义乌约德新材料有限公司 一种超薄型活塞模具浇道
CN110238351B (zh) * 2019-07-22 2021-03-23 临沂盛德机械有限公司 一种超薄型活塞模具浇道

Also Published As

Publication number Publication date
IT993838B (it) 1975-09-30
CA994983A (en) 1976-08-17
FR2210465A1 (enrdf_load_stackoverflow) 1974-07-12
DE2362973A1 (de) 1974-06-20
FR2210465B3 (enrdf_load_stackoverflow) 1976-08-27
JPS4990221A (enrdf_load_stackoverflow) 1974-08-28
GB1399683A (en) 1975-07-02

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