US3530994A - Core receiver table - Google Patents

Core receiver table Download PDF

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Publication number
US3530994A
US3530994A US746887A US3530994DA US3530994A US 3530994 A US3530994 A US 3530994A US 746887 A US746887 A US 746887A US 3530994D A US3530994D A US 3530994DA US 3530994 A US3530994 A US 3530994A
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US
United States
Prior art keywords
core
support
supports
core receiver
fingers
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
US746887A
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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 US3530994A publication Critical patent/US3530994A/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
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores

Definitions

  • a core receiver table to receive a core or mold having a variable contour and which is easily damaged.
  • the table carries a plurality of upstanding lingers which have a small frictional force to permit their being readily moved to conform to the irregular contour of any such core.
  • Hand wheels turn screws to relatively move two supports in the table and this frictionally binds the ngers in a located position. This frictional binding compresses elastic rubber sleeves to establish a yielding frictional force binding the fingers. Thereafter the table may be raised and lowered to receive successive cores with the lingers precisely positioned to receive these cores.
  • foundry practice cores or molds which are made from a refractory material such as sand plus a binder.
  • binders have been used for both solid and shell cores.
  • the use of the 'word core will mean either a core or a mold in the strict foundry sense. Machinery to make foundry cores is operated as rapidly and with as short a cycle time as is possible in order to obtain maximum productivity of the machine and floor space. Accordingly a bare minimum of time is provided for the binder material to set and usually this binder is only partially set so that the core is still fragile at the time it is released or ejected from the foundry machine.
  • the foundry machine manufacturer cannot possibly anticipate the literally millions of different types of cores which can or will Ibe produced by the foundry machine in its useful life, it is difficult to provide the machine with a rapid cycle time and still have a high percentage yield of cores which are not damaged.
  • the invention may be incorporated in a core receiver comprising, in combination, iirst and second supports disposed in generally parallel planes, a plurality of aligned transverse apertures in each of said supports, irst friction wall means on said iirst support at said apertures therein, second friction wall means on said second support at said apertures therein, said iirst and second friction wall means facing substantially in opposite directions, a plurality of core receiver lingers each disposed in an aligned set of apertures and each generally perpendicular to said supports and engaging said first and second friction wall means, and stress means acting between said supports to relatively move said supports in opposite directions generally parallel to said planes to establish said friction wall means holding said fingers in place with a frictional force.
  • an object of the invention is to provide a core receiver table which will gently and firmly support a core.
  • Another object of the invention is to provide a core receiver table with a plurality of fingers which may readily be projected at different elevations to receive a core with an irregular contour.
  • Another object of the invention is to provide a core receiver table with plural lingers frictionally held in place with a small frictional force so that they may readily be positioned to receive an irregular contour core and then the frictional force may be materially increased to lock the ngers in place to receive successive cores of the same shape.
  • Another object of the invention is to provide a core receiver table with stress means and elastic means connected in series between two supports which frictionally bind the plurality of fingers at adjustable elevations to receive a core.
  • FIG. 1 is a front elevational view partly in section of a core receiver table embodying the invention
  • FIG. 2 is a plan view partly broken away of the core receiver table
  • FIG. 3 is a side elevational view of the table of FIG. 2;
  • FIG. 4 is an enlarged sectional view on the line 4 4 of FIG. 2;
  • FIG. 11 shows a core receiver table 11 according to a preferred embodiment of the invention, however, this showing is only by way of example and the invention is not to be limited thereby.
  • This core receiver table 11 includes generally a plurality of ngers 12, a first support 13, a second support 14, and stress means 16.
  • the table 11 also includes besides the first and second lsupports a third support 15. These supports are shown as flat metal plates each disposed in generally parallel planes which are horizontal in this preferred embodiment.
  • the rst and third plates 13 and 15 are rigidly held together by bolts 18 passing through spacers 19.
  • Cross bars 20 are provided at the two ends of the table with journal surfaces 21 receiving a pivot bearing surface of links 22.
  • the links 22, in this case four in number, are actuated by a mechanism, not shown, to raise and lower the entire core receiver table vwhile retaining it generally horizontal.
  • the cross bars 20 are slidably journalled on the spacers 19 at the two sides of the table 11.
  • Compression springs 23 act between the top or irst support 13 and the cross bars 20 to urge these cross bars into engagement with the third or bottom support 15.
  • One purpose of the springs 23 is to permit a short ejection stroke of the foundry machine, allowing the core 30 to move away from the cavity of the core box with equal support and pressure by the table 11 without damage to the core.
  • Another purpose of this is to provide a safety spring support so that if the table 11 meets some obstruction in its upward movement, the springs 23 will yield permitting the cross ybars 20 to rise even though the table 11 cannot.
  • FIG. 4 better shows how each one of the lingers 12 is carried in the table 11.
  • Aligned apertures 25, 26, and 27 are provided in the first, second, and third supports 13, 14, and 15, respectively.
  • the apertures 25 and 27 are of approximately the same size to closely receive the respective finger 12.
  • the upper end of the finger 12 has a cap 28 to engage the core 30.
  • This cap 28 may be of any size' or shape as desired.
  • the core may have an irregular lower contour 31 as shown in FIG. l, and accordingly the elevation of each of the plural fingers 12 may be adjusted to evenly engage this core 30.
  • the stress means 16 includes a screw 33 threadably engaging a nut 34. This nut is in the form of a spacer spacing and interconnecting the first and third supports 13 and 15.
  • a hand wheel 35 is provided on the front of each of the two screws on the table 11 and the inner end 36 of each of the screws 33 acts against the second support 14. By moving the hand wheel 35, the second support 14 is moved relative to the first support 13 and also moved relative to the third support 15.
  • elastic means in the form of resilient blocks or elastic sleevs 38 are provided in series with the stress means 16 between the first and second support 13 and 14 and between the second and third supports 14 and 15.
  • These elastic sleeves 38 may be resilient compressible material such as rubber which have a length approximately equal to the spacing between the first and third supports 13 and 15.
  • the fingers 12 are preferably disposed within metal or suitable non-metallic material sleeves 39 for wear resistance and to provide for a sliding fit to allow adjusting the eleva tion of the fingers 12. These metal sleeves 39 are surrounded by the elastic sleeves 38.
  • These sleeves 38 are disposed within the respective apertures 26 in the second support 14 with an interference fit so that the elastic sleeves stay in place.
  • the two ends of the metal sleeve 39 lie closely adjacent the inner surfaces of the Ifirst and third supports 13 and 15 and surround the apertures 25 and 27. Also the two ends of the elastic sleeve 38 lie closely adjacent the inner surfaces of the first and third supports 13 and 15 and surround the apertures 25 and 27.
  • the fact that the elastic sleeves 38 are separate units for each finger 12 permits wider manufacturing tolerances in that the apertures 25, 26, and 27 do not need to be perfectly aligned.
  • Friction wall means are provided to frictionally grip each of the fingers 12. This friction wall means is included in the first, second, and third supports 13, 14, and 15.
  • the first and third friction walls 41 and 43 form a portion of the inner cylindrical periphery of the apertures 25 and 27 which is an actual surface of the supports 13 and 15.
  • the second friction wall 42 is not unitary with the second support 14 instead it is a part of the inner cylindrical periphery of the metal sleeve 39, and for this purpose the sleeve 39 may be considered a part of the second support 14.
  • a friction ball 45 is disposed in a detent hole 46 in the metal sleeve 39 at a location close to one end of the sleeve 39.
  • the friction ball 45 frictionally engages the side of the finger 12 as urged by the elastic deformation of the elsatic sleeve 38. Because the second support 14 is thinner than the space between the supports 13 and 15, this provides a space for the elastic sleeve to bulge as at 47 to accommodate the friction ball 45. This friction ball 45 urges the finger 12 into frictional engagement with the second friction wall 42 to hold the finger 12 in a vertical position, perpendicular to the support 13-15, with a relatively small force.
  • the friction ball 45 may be replaced by a cross pin or dowel, held in the elastic sleeve 38 and bearing frictionally against the respective finger 12.
  • FIG. 1 shows how the second support 14 is positioned approximately equidistant between yet out of contact with the first and third supports 13 and 15.
  • a spacer 50 surrounds one of the bolts 18 and a washer 51 holds this second support 14 in the proper position.
  • a second spacer 52 is provided between the washer 51 and the support 13.
  • a shorter elastic sleeve 53 is provided between these spacers 52 and the second support 14.
  • a smaller diameter aperture 54 of the second support 14 below the elastic sleeve 53 will engage the spacer 52 and hence limit the movement of support 14 relative to Supports 13 and 15.
  • the core receiver table 11 is designed to rapidly be adjusted to receive gently but lrmly any core 30 which may have some irregular lower contour 31.
  • the core receiver table 11 may be moved up and down by the links 22 and when moved upwardly may be disposed closely adjacent a core discharge station of a core making foundary machine, not shown.
  • These cores when first made are soft and fragile because enough time to allow the core to become set to a hardened state cannot economically be provided. Accordingly at the time that the core 30 is discharged onto the core receiver table 11 it is still somewhat soft and may have sharp projections 56 or other fragile parts which must be handled carefully otherwise they will break and if so then the percentage yield of the satisfactory cores from the foundary machine will be lower.
  • the hand wheels 35 are loosened to the position shown in FIG. 3.
  • practically the only force holding each finger 12 is the frictional force established by the friction ball y45. This will be a small frictional force enough to carry the weight of each finger 12.
  • the table 11 is then moved upwardly into contact with the irregular contour 31 of the core 30 and these fingers 12 will then adjust themselves to the proper position for support of this core 30.
  • the core table may provide as many as a hundred or more fingers 30.
  • the core table may provide as many as a hundred or more fingers 12 and if any finger happens to come right at a projection such as projection 56 or if it comes at a sharp corner 57 then such finger may be removed entirely.
  • the ball 45 may alternatively be positioned at any location around the periphery of the elastic sleeve 38 and will perform its function of slight frictional force on the finger 12. With the hand wheels 35 tightened then the entire plurality of fingers 12 are frictionally bound in position so that the core receiver table 11 may then be used in its normal up and down movement to receive, and to discharge onto a ribbon conveyor for example, successive cores 30 all having the same lower contour 31. By this means the successive cores of the same shape will all be gently handled without fear of the cores being damaged. Also the irregular contour established by the tops of the fingers 12 may be moved up into very close engagement or actual engagement with the core 30 at the end of ejection of this core. This still further reduces the possibility of breakage of the cores 30.
  • a core receiver comprising, in combination,
  • a core receiver as set forth in claim 1 including a third support disposed generally parallel to said first and second supports and adjacent said second support,
  • said elastic means includes an elastic sleeve surrounding each of said fingers.
  • a core receiver as set forth in claim 8 including a metal sleeve disposed -between each of said fingers and the respective elastic sleeve.
  • a core receiver as set forth in claim 8 including a friction ball disposed within said elastic sleeve and acting against the respective finger.
  • a core receiver as set forth in claim 8 including a metal sleeve surrounding the respective finger and disposed between the respective finger and the respective elastic sleeve,
  • a core receiver as set forth in claim 3 including an elastic sleeve surrounding the respective finger.
  • spacer means to space said rst and third supports apart a distance materially greater than the thickness of said second support
  • a core receiver as set forth in claim 15 including a friction ball disposed near one end of each of said elastic sleeves and urged by the elasticity of the respective sleeve into frictional engagement with the respective finger.
  • a core receiver as set forth in claim 3 including a nut connected to said first and third supports,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US746887A 1968-07-23 1968-07-23 Core receiver table Expired - Lifetime US3530994A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74688768A 1968-07-23 1968-07-23

Publications (1)

Publication Number Publication Date
US3530994A true US3530994A (en) 1970-09-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US746887A Expired - Lifetime US3530994A (en) 1968-07-23 1968-07-23 Core receiver table

Country Status (3)

Country Link
US (1) US3530994A (de)
FR (1) FR1602336A (de)
GB (1) GB1232546A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917207A (en) * 1974-08-19 1975-11-04 Earle W Quigley Tissue box holder
US4088312A (en) * 1977-09-27 1978-05-09 Nasa Variable contour securing system
US4157802A (en) * 1977-07-15 1979-06-12 Burleigh Instruments, Inc. Rigid thermally stable structure for supporting precision devices
US4527783A (en) * 1983-04-26 1985-07-09 Grumman Aerospace Corporation Universal contoured parts holding fixture
US4572564A (en) * 1984-07-12 1986-02-25 General Electric Company Adaptive gripping device
US4871154A (en) * 1988-10-24 1989-10-03 Seney John S Work holding device for handicapped persons
US5121907A (en) * 1991-06-21 1992-06-16 The Boeing Company Rotatable reconfigurable table for holding and supporting contoured workpieces
WO1996033048A1 (en) * 1995-04-21 1996-10-24 Kurt Manufacturing Company, Inc. Workholding wedge clamp
US20080012194A1 (en) * 2006-07-10 2008-01-17 Sapp Willie L Device and method for suspending and supporting a workpiece to allow a user to apply a coating to the entire exterior surface thereof
DE202010000536U1 (de) * 2010-04-08 2011-08-11 Matrix Gmbh Spannsysteme Und Produktionsautomatisierung Vorrichtung mit Stößeln zur Anlage an einer Oberfläche mit dreidimensionalem Verlauf

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1982804A (en) * 1931-11-19 1934-12-04 Gardner Machine Co Work supporting fixture
US2311942A (en) * 1941-02-07 1943-02-23 Castings Patent Corp Means for supporting plastic articles
GB568704A (en) * 1943-06-15 1945-04-17 Herbert Fell Improvements in holding or supporting devices
GB639696A (en) * 1948-02-11 1950-07-05 Herbert John Caudle Improvements in and relating to clamping and like devices
US2733488A (en) * 1956-02-07 valyi
US2754708A (en) * 1953-08-25 1956-07-17 Multiple Die Vise Co Inc Vise for irregularly shaped objects
US3103353A (en) * 1960-04-08 1963-09-10 Carl O Lassy Gang fixture

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733488A (en) * 1956-02-07 valyi
US1982804A (en) * 1931-11-19 1934-12-04 Gardner Machine Co Work supporting fixture
US2311942A (en) * 1941-02-07 1943-02-23 Castings Patent Corp Means for supporting plastic articles
GB568704A (en) * 1943-06-15 1945-04-17 Herbert Fell Improvements in holding or supporting devices
GB639696A (en) * 1948-02-11 1950-07-05 Herbert John Caudle Improvements in and relating to clamping and like devices
US2754708A (en) * 1953-08-25 1956-07-17 Multiple Die Vise Co Inc Vise for irregularly shaped objects
US3103353A (en) * 1960-04-08 1963-09-10 Carl O Lassy Gang fixture

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917207A (en) * 1974-08-19 1975-11-04 Earle W Quigley Tissue box holder
US4157802A (en) * 1977-07-15 1979-06-12 Burleigh Instruments, Inc. Rigid thermally stable structure for supporting precision devices
US4088312A (en) * 1977-09-27 1978-05-09 Nasa Variable contour securing system
US4527783A (en) * 1983-04-26 1985-07-09 Grumman Aerospace Corporation Universal contoured parts holding fixture
US4572564A (en) * 1984-07-12 1986-02-25 General Electric Company Adaptive gripping device
US4871154A (en) * 1988-10-24 1989-10-03 Seney John S Work holding device for handicapped persons
US5121907A (en) * 1991-06-21 1992-06-16 The Boeing Company Rotatable reconfigurable table for holding and supporting contoured workpieces
WO1996033048A1 (en) * 1995-04-21 1996-10-24 Kurt Manufacturing Company, Inc. Workholding wedge clamp
US20080012194A1 (en) * 2006-07-10 2008-01-17 Sapp Willie L Device and method for suspending and supporting a workpiece to allow a user to apply a coating to the entire exterior surface thereof
DE202010000536U1 (de) * 2010-04-08 2011-08-11 Matrix Gmbh Spannsysteme Und Produktionsautomatisierung Vorrichtung mit Stößeln zur Anlage an einer Oberfläche mit dreidimensionalem Verlauf

Also Published As

Publication number Publication date
DE1936142A1 (de) 1970-08-27
GB1232546A (de) 1971-05-19
FR1602336A (de) 1970-11-09

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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