US3327767A - Method and apparatus for making cored casting molds - Google Patents

Method and apparatus for making cored casting molds Download PDF

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Publication number
US3327767A
US3327767A US464903A US46490365A US3327767A US 3327767 A US3327767 A US 3327767A US 464903 A US464903 A US 464903A US 46490365 A US46490365 A US 46490365A US 3327767 A US3327767 A US 3327767A
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Prior art keywords
core
mould
box
cores
cavity
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Expired - Lifetime
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US464903A
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English (en)
Inventor
Charles M G Wallwork
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HERMAN Corp A PA CORP
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Individual
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Assigned to BARCLAYS BANK LIMITED reassignment BARCLAYS BANK LIMITED APPOINTMENT OF RECEIVER Assignors: HENRY WALLWORK & CO.,
Assigned to HERMAN CORPORATION, THE A PA CORP. reassignment HERMAN CORPORATION, THE A PA CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HENRY WALLWORK & COMPANY LIMITED, WALLWORK, CHARLES MICHAEL GEOFFREY
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/108—Installation of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C11/00—Moulding machines characterised by the relative arrangement of the parts of same

Definitions

  • This invention relates to foundry cores. These are normally made by one of various well-known methods, by hand, followed by baking in an oven, or by blowing into a hot or cold core-box, and then the cores thus formed are placed by hand in the drag of the mould box before the core is placed finally in position for pouring.
  • the core-making and placing method according to the invention is especially applicable to automatic moulding plant, and in particular to the automatic moulding machine forming the subject of our British Patent No. 803,- 332.
  • machine moulds formed between a pair of opposed pattern plates are displaced laterally from the point of moulding and then pushed out of the slider in which they are formed, so as to join a line of previously formed moulds.
  • the vertical faces of the adjacent moulds are in contact and the cavities into which the metal is poured are formed between those faces.
  • the mechanism necessary for transferring the corebox from the blowing position to the placing position can take any suitable form.
  • the cores are preferably blown in the orthodox manner, i.e. downwards from a blowing head above the core-box, the latter being horizontal.
  • the core-box then has to be turned to the vertical position and moved into line with the axis of the line of moulds, the final movement being an axial one, i.e. in a horizontal direction perpendicular to the plane of the faces of the core-box and of the mould.
  • FIGURE 1 is a plan view of a part of the automatic casting equipment that forms the subject of our British Patent No. 803,332, showing the disposition of the coremaking equipment of the present invention
  • FIGURE 2. is a plan view of the core-making equipment to a larger scale
  • FIGURE 3 is an elevation of the lower part of the coremaking equipment, looking in the direction of the arrow in FIGURE 2;
  • FIGURE 4 is an elevation showing the upper part of the core-making equipment in greater detail
  • FIGURE 5 is an elevation looking from the left in FIG- UR-E 4.
  • FIGURE 6 shows in diagrammatic form at (a) to (d) the successive steps in the formation of the cores.
  • FIGURE 7 is a perspective view, looking partially from below, of a cover plate through which the cores are gassed.
  • the automatic casting equipment shown comprises a moulding machine 1 in which there is a transversely moving slide 2, somewhat like the slide of a slide projector for transparencies, and this slide has two openings (not shown) which, by horizontal reciprocating movement of the slide, are alternately brought into alignment with a pair of opposed pattern plates (not shown) carried on the ends of hydraulic rams 3. Sand blown into the opening in the slide is squeezed between the pattern plates to form a mould in the form of a rectangular block of sand with pattern impressions in both its vertical faces.
  • the blowing head could be placed directly over the axis of the line 4 or 4', simplifying the geometry of the movement of the core-box, but in practice we find it better to displace the blowing head to one side, keeping it clear of the moulding machine, and to accept slightly greater complication in the transferring mechanism.
  • the core-box comprises two parts, an upper part B and a lower. part A, with the cavities in which the cores are formed disposed partly in one and partly in the other.
  • the lower core-box part A is carried on an arm 15 pivotally mounted to turnabout an inclined axis on a carriage 14 which. can slide on apair of guide bars 11 and 12 on the upper end of a swinging structure comprising pairs of arms 8 and 9.
  • Hydraulic rams 13, 16 and 17 cause the various movements and, as described more fully in the specification of our co-pending patent application, the lower core-box portion A can be moved, by actuation'of the rams, between a position in which it is horizontal with its core-receiving face uppermost, and a position in which its core-receiving face is vertical and lies against the exposed face of the. last mould to join the line 4.
  • the part A lies immediately below the part B, which in its turn lies immediately below the blowing head, shown at H.
  • the head H is vertically movable on guide pillars 19 under thecontrol of hydraulic rams 20 and the upper core-box part B is vertically movable on the head H under the control of hydraulic rams 21.
  • a cover plate S which can slide horizontally with respect to the upper core-box part B under the control of hydraulic rams 22, between a position in which it is clear of the core-box and a position in which it closes off the upper face of the core-box.
  • a mixture of sand and binder is fed in a known manner from a hopper (not shown) disposed above the blowing head H, the supply of material in the hopper being maintained automatically by level-sensing devices.
  • a butterfly valve V or it could be a slide valve controlling the admission of the sand-binder
  • the cores are formed continuously and automatically by operation in sequence of hydraulic, rams controlling the various movements of the valve V, the head H, the cover plate S and the upper core-box B in a manner to be described with reference to FIGURE 6.
  • the cavities in the core-box are placed so that the cores are in their correct relative positions and when the lower corebox part A is moved by the linkage of FIGURES 2 and 3 to transfer-the cores directly into the mould the corebox thus effectively forms a. jig to hold them in these correct relative positions.
  • the upper core-box part B When curing or baking is complete, which can be within two or three seconds, the upper core-box part B is lifted, together with the cover plate. As it is lifted, compressed air is fed to the upper faces of the cores through the cover plate S to hold the cores themselves down in the lower box part A, as shown in FIGURE 6 (d). As the part B rises, the cover plate S is withdrawn, allowing the upper face of this part to return into engagement with the blowing head H as it was at the start.
  • the lower core-box part A is now swung down to a vertical position by rotation of the arm 15, and then this arm, complete with the carriage 14, is swung across by ram 17 until the face of the part A from which the cores project is aligned with, but spaced from, the exposed face of the end mould in the line 4.
  • the carriage 14 now moves on the guide bars 11 and 12 to bring the cores into the moulding cavity, which of course has recesses placed to receive them.
  • the box part A now returns to the position shown in FIGURE 6 (a) and the whole core-making and placing sequence is repeated, the squence being tuned to synchronise with the production and placing of a fresh mould in the line 4 to receive the new cores.
  • the actual disposition of the coreblowing head could be different from that shown.
  • the linkage that transfers the core-box part A from the blowing position to "the discharging position could take any one of a number of different forms.
  • the coreblowing head could operate horizontally instead of vertically and this would simplify the transfer movement but the blowing process is less satisfactory.
  • the cores could be cured by heat, in which case the core-box wouldbe pro vided with suitable heating elements.
  • a method of making cored casting moulds comprising the steps of forming a first double sided sand-mould with a mould surface on each of two opposite sides thereof, each of said mould surfaces forming a part of a casting cavity and at least one of them being in-the form of a depression in its respective side of the mould; blowing a core in a cavity of a core-box at a position displaced from said mould; moving at least a part of said core-box with said core to a position in which it lies adjacent to the mould with the core engaging in said depressions on one side of said mould; withdrawing said core-box part from said mould while simultaneously urging said corebox part and said core apart whereby to cause said core to remain in said depression in said mould; forming a second double sided sand-mould with a mould surface on each of two opposite sides thereof; moving said second mould to a position in which it completes said casting cavity within which said core remains; blowing a second core in a cavity of a core-box at a position
  • a method of making cored casting moulds comprising the steps of forming a first double sided sand-mould with a mould surface on each of two opposite sides thereof, each of said mould surfaces forming a part of a casting cavity having therein a plurality of depressions blowing a plurality of cores in cavities of a core-box at a position displaced from said mould, said cavities having relative positions with respect to each other corresponding to the relative positions of the depressions in each of said mould surfaces, moving at least a part of said core-box with said cores to a position in which it lies adjacent to the mould with the cores engaging in said depressions on one side of said mould, withdrawing said core-box part from said mould while simultaneously urging said corebox part and said cores apart whereby said cores remain in said depressions in said mould, forming a second double sided sand-mould with a mould surface on each of two opposite sides thereof, moving said second mould to a position in which it completes said casting cavity within which said cores remain, blowing
  • Apparatus for making cored casting moulds comprising means for forming a double sided sand-casting mould having a mould surface on each of two opposite sides, each of said surfaces being a part of a casting cavity and having at least one depression therein, means for blowing at least one core in a cavity of a core-box at a position displaced from said mould, means for moving at least a part of said core-box with said core to a position in which it lies adjacent to the mould with the core engaging in said depression on one side of said mould, means for withdrawing said core-box part from said mould while simultaneously urging said core-box part and said core apart whereby said core remains in said depression in said mould, means for forming a second doublesided sand-mould with a mould surface on each of two opposite sides thereof, means for moving said second mould to a position in which it completes said casting cavity within which said core remains, means for blowing a second core in a cavity of a core-box at a position displaced from said first and second moulds
  • each of said coreboxes comprises upper and lower parts meeting in a horizontal plane and having at least one core cavity therein, a core-blowing head associated with said core-box, means for displacing said lower core-box part, complete with the core in the cavity thereof, from said blowing head to a position in which the upper horizontal face of said lower core-box part is vertical and is in face-to-face engagement with the casting cavity in the vertical face of said mould, and means for holding the core in the depression in said casting cavity as said lower core-box part is withdrawn.
  • each mould surface has a plurality of depressions therein
  • each core-box has a plurality of core-cavities therein corresponding in number and position to the depressions in said mould surface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US464903A 1964-06-19 1965-06-18 Method and apparatus for making cored casting molds Expired - Lifetime US3327767A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25366/64A GB1057547A (en) 1964-06-19 1964-06-19 Cored foundry moulds

Publications (1)

Publication Number Publication Date
US3327767A true US3327767A (en) 1967-06-27

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Application Number Title Priority Date Filing Date
US464903A Expired - Lifetime US3327767A (en) 1964-06-19 1965-06-18 Method and apparatus for making cored casting molds

Country Status (8)

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US (1) US3327767A (de)
AT (1) AT261133B (de)
BE (1) BE665501A (de)
DE (1) DE1508740A1 (de)
DK (1) DK113463B (de)
ES (1) ES314413A1 (de)
GB (1) GB1057547A (de)
NL (1) NL6507879A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433285A (en) * 1965-07-30 1969-03-18 Harrison E Fellows Pneumatic impact-molding machine with shuttle hopper
US3802485A (en) * 1972-03-22 1974-04-09 A Popov Plant for producing and fitting together flaskless casting moulds
US3886993A (en) * 1973-05-30 1975-06-03 Sam Larkin Sand molding apparatus
US4026345A (en) * 1974-06-26 1977-05-31 Wallwork C M G Foundry moulding
US4079774A (en) * 1973-06-25 1978-03-21 Dansk Industri Syndikat A/S System for making sand molds each having associated therewith a core member
US4809763A (en) * 1986-06-04 1989-03-07 Eisenwerk Bruhl Gmbh Method of and apparatus for producing molds and mold sections and cores

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1756602A (en) * 1929-05-22 1930-04-29 Wetherill Morris Engineering C Attachment for casting machines
US2871527A (en) * 1956-03-09 1959-02-03 Wallwork & Co Ltd Method of and means for the production of castings
US3060534A (en) * 1960-01-06 1962-10-30 Jean A Enzenbacher Core setting method and apparatus
US3181207A (en) * 1962-03-15 1965-05-04 Altamil Corp Automatic mold preparing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1756602A (en) * 1929-05-22 1930-04-29 Wetherill Morris Engineering C Attachment for casting machines
US2871527A (en) * 1956-03-09 1959-02-03 Wallwork & Co Ltd Method of and means for the production of castings
US3060534A (en) * 1960-01-06 1962-10-30 Jean A Enzenbacher Core setting method and apparatus
US3181207A (en) * 1962-03-15 1965-05-04 Altamil Corp Automatic mold preparing apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433285A (en) * 1965-07-30 1969-03-18 Harrison E Fellows Pneumatic impact-molding machine with shuttle hopper
US3802485A (en) * 1972-03-22 1974-04-09 A Popov Plant for producing and fitting together flaskless casting moulds
US3886993A (en) * 1973-05-30 1975-06-03 Sam Larkin Sand molding apparatus
US4079774A (en) * 1973-06-25 1978-03-21 Dansk Industri Syndikat A/S System for making sand molds each having associated therewith a core member
US4026345A (en) * 1974-06-26 1977-05-31 Wallwork C M G Foundry moulding
US4809763A (en) * 1986-06-04 1989-03-07 Eisenwerk Bruhl Gmbh Method of and apparatus for producing molds and mold sections and cores

Also Published As

Publication number Publication date
BE665501A (de) 1965-10-18
ES314413A1 (es) 1966-05-01
AT261133B (de) 1968-04-10
NL6507879A (de) 1965-12-20
DE1508740A1 (de) 1969-11-13
GB1057547A (en) 1967-02-01
DK113463B (da) 1969-03-24

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Date Code Title Description
AS Assignment

Owner name: HERMAN CORPORATION, THE ZELIENOPLE, PA. 16063 A PA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:WALLWORK, CHARLES MICHAEL GEOFFREY;HENRY WALLWORK & COMPANY LIMITED;REEL/FRAME:004238/0250

Effective date: 19830105

Owner name: BARCLAYS BANK LIMITED

Free format text: APPOINTMENT OF RECEIVER;ASSIGNOR:HENRY WALLWORK & CO.,;REEL/FRAME:004238/0811

Effective date: 19810925