US3540608A - Core receiver assembly - Google Patents

Core receiver assembly Download PDF

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Publication number
US3540608A
US3540608A US735867A US3540608DA US3540608A US 3540608 A US3540608 A US 3540608A US 735867 A US735867 A US 735867A US 3540608D A US3540608D A US 3540608DA US 3540608 A US3540608 A US 3540608A
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US
United States
Prior art keywords
core
conveyor
lever
plane
core receiver
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
US735867A
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English (en)
Inventor
Hugh A Bourassa
Arthur H Emser
Edward J Ptak
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.)
ROBERTS Corp A MI CORP
Roberts Corp
Original Assignee
Acme Cleveland 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 Acme Cleveland Corp filed Critical Acme Cleveland Corp
Application granted granted Critical
Publication of US3540608A publication Critical patent/US3540608A/en
Assigned to ROBERTS CORPORATION, A MI CORP. reassignment ROBERTS CORPORATION, A MI CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ACME-CLEVELAND CORPORATION
Assigned to ROBERTS CORPORATION reassignment ROBERTS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ACME-CLEVELAND CORPORATION
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
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes
    • B22C7/067—Ejector elements

Definitions

  • the disclosure relates to an assembly to receive a core or mold from a foundry machine and to move it gently onto a conveyor.
  • the core may be dropped by gravity onto a series of fingers held in a core receiving table and then this table drops downwardly to gently place the core on a ribbon type conveyor.
  • the table moves downwardly about twice as far as the conveyor to achieve this gentle transfer and to get both the conveyor and the table with its fingers out of the way of the foundry machine and its succeeding cycles of operation.
  • Both the core receiving table and the conveyor move along a vertical path with a common motive means for the two.
  • core will be used to mean either a core or mold in the strict foundry sense.
  • more automatic machinery is preferred because of the increasingly higher labor costs, it is increasingly desirable to automatically remove the cores from the vicinity of the foundry machine and to convey them to other machines in the foundry.
  • the cores are generally fragile just after being formed because fast cycle times are desired and a minimum of time for the core to set or otherwise become hard enough to handle is provided. If a longer time were provided this would not be an economical use of the automated machinery and production floor space.
  • an object of the present invention is to provide a core receiver assembly to gently receive a core.
  • Another object of the invention is to provide a core receiver assembly to receive a core on fingers held in a table with these fingers moved downwardly to smoothly transfer the core to a more slowly descending ribbon conveyor.
  • Another object of the invention is to provide a core receiver assembly wherein a core receiver table is moved upwardly and then downwardly a given distance to receive and then transfer the core to a conveyor which is moved upwardly and downwardly about half said given distance.
  • Another object of the invention is to provide a core receiver assembly having a single motive means to move both a core receiver table and a conveyor which subsequently receives the core.
  • Another object of the invention is to provide a core receiver assembly wherein fingers first receive a core and are above a conveyor and then subsequently move downwardly to a posi- -tion below the conveyor to transfer the core onto the conveyor.
  • Another object of the invention is to provide a core receiver assembly which moves in a vertical plane without having any vertical guides.
  • the invention may be incorporated in a core receiver assembly comprising, in combination, a frame, a core receiving table, first and second linkage assemblies, each said first and second linkage assembly including, a lever-link having first and second ends and a midpoint, means to move said midpoint of said lever-link through an arc, guide in a first plane on said frame, a rolling and sliding pivot on said first end of said leverlink pivotally and slidably moving along said guide, and a pivotal connection between the second end of said lever-link and said core receiving table whereby as said lever-link midpoint is moved in one direction in said are said core receiving table is moved a given distance in a second plane generally perpendicular to said first plane.
  • FIG. 1 isan end elevational view of a machine incorporating the invention. 7
  • FIG 2 is a top view of the machine of FIG. 1 with the conveyor mostly cutaway;
  • FIG. 3 is a side view of FIG. 1, partly in section.
  • FIGS. of the drawing show a preferred embodiment of the invention but such disclosure is merely by way of example and is not to be taken as limiting, the invention being defined only by the appended claims.
  • the FIGS. of the drawing show a core receiver assembly 10 which includes generally a conveyor 11, a core receiver table 12, first and second linkage assemblies 1 3 and 14, respectively, and a frame 15.
  • the first linkage assembly 13 includes generally a first lever 17, a first lever-link l8 and a first support 19.
  • the frame 15 may generally be considered as a fixed frame although in this preferred embodiment it is mounted on wheels 25 which may run on tracks 26 so that the entire core receiver assembly 10 may be removed from beneath a foundry machine 28, shown in phantom, which makes the cores or molds 27.
  • core will be used to mean either a core or mold in the strict foundry practice sense.
  • the foundry machine may be designed to eject vertically downwardly the core or cores 27 with the cores receivable on fingers 29 of the core receiver table 12 and to subsequently transfer such core onto the conveyor 11 as both the conveyor 11 and table 12 descend.
  • the first and second linkage assemblies 13 and 14 provide for a vertical movement of the core receiver table 12 a given distance and provide for vertical movement of the conveyor 11 about half this given distance.
  • the conveyor 11 and receiver table 12 are shown in full lines in the lower limit positions thereof and phantom line positions 11 and 12', respectively, show these two parts in the upper limit positions thereof.
  • a motive means is provided in the form of a fluid piston and cylinder 31.
  • Two such cylinders 31 may be provided for symmetry, see FIG. 2.
  • the first and second linkage assemblies 13 and 14 are identical with the second being a mirror image of the first for ease of operation by the fluid cylinder 31 and for compactness of the assembly. Accordingly only the first linkage assembly 13 will be described in detail.
  • the lever 17 is a bell crank lever having an intermediate point 34 pivoted on the frame 15. This bell crank lever 17 has a first end 35 pivoted to the midpoint of the lever-link 18 at a pivot point 36.
  • the lever 17 also has a second end pivoted at 37 to one end of the piston and cylinder 31.
  • the lever-link 18 has first and second ends 38 and 39, respectively, and the first end 38 carries a roller 40 which is a rolling and sliding pivot between guides 41. These guides 41 are established in a first plane which is horizontal in this preferred embodiment.
  • the second end 39 of the lever-link 18 is pivoted at 42to the core receiver table 12.
  • the support 19 has first and second ends 45 and 46, respectively, with the first end 45 connected to be moved by the arcuate movement of the lever 17. To achieve this the first end 45 is pivoted at the same pivot 36 which is the pivotal interconnection of lever 17 and lever-link 18.
  • the second end 46 of the support 19 extends generally vertically which is also generally parallel to a second plane perpendicular to the first plane.
  • the conveyor 11 has two sides each of which is pivotally connected to the respective support 19 and 23. This pivotal connection on the support 19 is at a. pivot point 47 near the second end 46, and at pivot 48 to the support 23.
  • a stabilizer bar 50 is provided between the first and second linkage assemblies 13 and 14. One end is connected to the lever 17 at a point midway between the pivots 34 and 37 and the other end is connected to an extension 51 of the second lever 21 to assure that the two levers l7 and 21 may move concurrently at the same rate and thus establish movement of the core receiver table directly along the second plane. This is a vertical plane and hence the pivot point 42 moves vertically.
  • the lever 17 first end 35 moves in an arc with a lower limit position shown in solid lines in FIG. 1 and shown in phantom lines for the second limit position. This is a 90 arcuate movement as established by a lower limit stop 52 and an upper limit stop 53.
  • the lever 17 first end 35 travels from a lower limit position of about 45 below the horizontal through a horizontal position to an upper limit position of about 45 above the horizontal.
  • the arc of movement 55 is generally parallel to the second plane and hence generally parallel to the path of movement of the pivot 42.
  • this are 55 is the mirror image of the arc 56 of the pivot 57 which interconnects the lever 21 lever-link 22 and support 23.
  • These arcs 55 and 56 have their convex sides facing each other.
  • These arcs 55 and 56 are generally parallel to the second plane which in this case is vertical.
  • the support 19 has an extension 60.
  • a cross stabilizer S9 is attached to the extension 60 of the support 19 at a pivot point 61 and its other end is attached at a pivot point 62 to the support 23.
  • FIG. 1 shows the core receiver assembly 10 in the first or lower limit position and in phantom shows the assembly 10 in the second or upper limit position.
  • the motive means or fluid cylinder and piston 31 is moved from its closed position shown to an extended position of the piston.
  • This motive means 31 is free floating with both the right end of the cylinder and the piston rod on the left being movable.
  • the extension of the piston rod acts on pivot 37 to swing it through a 90 are which motion will be limited by the upper limit stop 53.
  • the bell crank lever 17 is accordingly pivoted 90 so that the first end pivot point 36 swings through the are 55 of approximately 90. This establishes a motive means to move the midpoint 36 of the lever-link 18 through this same are 55.
  • the second linkage assembly 14 has an identical and mirror image operation so that the core receiver table 12 moves vertically to the upper limit position shown in phantom lines 12" in FIG. 1.
  • the stabilizer 50 assures concurrent and equal arc movements of the two bell crank lever 17 and 21 to assure that the core receiver table 12 stays horizontal as it is moved vertically. This core receiver table 12 moves a given distance from the lower to the upper limit position.
  • the conveyor 11 is composed of a series of ribbons or separated belts so that the core receiving fingers 29 may pass upwardly and downwardly between these ribbons to receive the core 27.
  • the conveyor 11 moves approximately half said given distance by being connected to the linkage assemblies 13 and 14 at the lever-link midpoints 36 and 57. Because the lever-link first end 40 remains in a horizontal plane while the second end pivot 42 moves through said given distance, the midpoint pivot 36 will move only one-half said given distance.
  • the supports 19 are moved upwardly and downwardly directly in accordance with the arcuate movement of the bell crank levers 17 and 21. Again considering only the first linkage assembly 13, the first support 19 is generally parallel to the second or vertical plane, but is not quite vertical in the lower limit position shown in solid lines.
  • the width of the conveyor 11 between the pivotal connections 47 and 48 thereof to the supports 19 and 23 is such as to establish this support 19 at a small angle B relative to the vertical.
  • the bell crank lever 17 has swung through its are 55 to the upper limit position, the new position of the pivot point 36 will be vertically above its former position and accordingly the phantom line position 19 of the support 19 shows that it will be disposed at the same angular attitude as in the lower limit position.
  • the pivot point 36 will have swung to the farthest left position. as viewed in FIG. 1.
  • the support 19 will be disposed at an angle equal to the small given angle B but disposed on the opposite side of the vertical plane.
  • the stabilizer 59 is attached to the support 19 at pivot point 61 and its other end is attached to the pivot point 62 of the support 23.
  • the spacing between the pivots 61 and 47 is equal to the spacing between pivots 62 and 48, with pivot 62 being below the pivot 48 on the support 23.
  • This stabilizer 59 thus maintains the two supports 19 and 23 generally parallel to the vertical plane even though these supports 19 and 23 do change slightly in angular attitude during the arcuate movement of the bell crank levers 17 and 21. Without this stabilizer 59 the pivot points 36, 47, 48, and 57 could act like a parallelogram linkage which would not be stable and could tend to collapse to one side. The stabilizer 59 prevents this and maintains the conveyor 11 horizontal as it moves directly vertically.
  • FIG.l shows the angular relationship wherein the first end of the lever 17 is disposed approximately perpendicular to the lever-link 18, in each of the upper and lower limit positions of the core receiver assembly. Also the lever-link 18 is established at approximately a 45 angle relative to each of the first and second planes in each of these upper and lower limit positions of the core receiver assembly 10.
  • the preferred embodiment of the invention provides a core receiver assembly which gently receives and moves a core 27 as it is ejected downwardly and transfers this core onto the conveyor 11 in a gentle and smooth action manner as both the conveyor 11 and the table 12 are descending so thatfragile portions of the core 27 are not broken and this will increase the total effective productivity of the foundry machine 28.
  • a core receiver assembly comprising, in combination:
  • each said first and second linkage assembly including, a
  • lever-link having first and second ends and a midpoint; means to move said midpoint of said lever-link through an arc;
  • a core receiver assembly as set forth in claim 5 including a stabilizer interconnecting said supports in each of said first and second linkage assemblies at a connection point on one of said supports a given spacing above said pivotal connection means of said conveyor means, and the connection point of said stabilizer to the other said support being said given spacing below said pivotal connection means of said conveyor means on the said other support, said stabilizer establishing said conveyor means for movement in a vertical plane.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Specific Conveyance Elements (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
US735867A 1968-06-10 1968-06-10 Core receiver assembly Expired - Lifetime US3540608A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73586768A 1968-06-10 1968-06-10

Publications (1)

Publication Number Publication Date
US3540608A true US3540608A (en) 1970-11-17

Family

ID=24957543

Family Applications (1)

Application Number Title Priority Date Filing Date
US735867A Expired - Lifetime US3540608A (en) 1968-06-10 1968-06-10 Core receiver assembly

Country Status (5)

Country Link
US (1) US3540608A (de)
JP (1) JPS4840169B1 (de)
DE (1) DE1928928C3 (de)
FR (1) FR1602335A (de)
GB (1) GB1258626A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU864660A1 (ru) * 1980-07-15 1987-08-15 Центральное Проектно-Конструкторское И Технологическое Бюро "Главсантехпрома" Механизм выдачи стержней
CN110510490B (zh) * 2019-09-24 2021-10-26 扬州大学 一种可在较大温度范围内使用的电梯专用复合式滚轮、滚轮加工装置及滚轮加工方法
CN117798786B (zh) * 2024-03-01 2024-05-28 三明市南益机械设备有限公司 一种铸件表面处理装置

Also Published As

Publication number Publication date
DE1928928C3 (de) 1974-09-26
JPS4840169B1 (de) 1973-11-29
FR1602335A (de) 1970-11-09
DE1928928B2 (de) 1974-02-28
DE1928928A1 (de) 1970-04-16
GB1258626A (de) 1971-12-30

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERTS CORPORATION, 3001 WEST MAIN ST., LANSING,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ACME-CLEVELAND CORPORATION;REEL/FRAME:004402/0613

Effective date: 19850426

AS Assignment

Owner name: ROBERTS CORPORATION, 3001 WEST MAIN STREET, LANSIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ACME-CLEVELAND CORPORATION;REEL/FRAME:004410/0921

Effective date: 19850426