US3854832A - Handling rod assembly for investment casting mold - Google Patents

Handling rod assembly for investment casting mold Download PDF

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Publication number
US3854832A
US3854832A US00323937A US32393773A US3854832A US 3854832 A US3854832 A US 3854832A US 00323937 A US00323937 A US 00323937A US 32393773 A US32393773 A US 32393773A US 3854832 A US3854832 A US 3854832A
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US
United States
Prior art keywords
rod
rod assembly
lug
handling
sleeve
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
US00323937A
Inventor
G Cowper
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Priority to US00323937A priority Critical patent/US3854832A/en
Priority to GB102974A priority patent/GB1394565A/en
Priority to JP49006691A priority patent/JPS49101227A/ja
Application granted granted Critical
Publication of US3854832A publication Critical patent/US3854832A/en
Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
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
    • B22C7/02—Lost patterns
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/22—Adjustable handles
    • A63B60/28—Adjustable handles with adjustable length
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7005—Lugged member, rotary engagement
    • Y10T403/7007—Bayonet joint
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7016—Diametric end slot is joint component

Definitions

  • Automated handling apparatus for making ceramic shell molds normally comprise a handling rod assembly, including a connecting lug embedded in a wax cuff having a wax pattern secured thereto.
  • the lug is threadably connected to an elongated rod of the rod assembly during formation of the mold, wherein the wax pattern is repeatedly dipped in a ceramic slurry to form a ceramic shell mold therearound.
  • the wax mold is elevated and twirled to evenly distribute a coating of the ceramic slurry therearound and to permit the run-off of excess slurry.
  • FIG. 2 is an exploded, isometric view of the handling rod assembly.
  • FIG. 1 illustrates a handling rod assembly operatively connected to a wax pattern 12, simulating the crankshaft ofa fuel injection pump, by means of a cast cuff .13.
  • the cuff may be cast from any suitable material, such as wax or aluminum, and suitably secured to the upper end of the wax pattern. When the pattern and the cuff each constitute a wax material, thay may be bonded together at the wax interface therebetween.
  • a connecting lug 14 has an irregularly shaped head 15 formed thereon for embedment in the cast. cuff.
  • the head thus provides a drive connection between the lug and cuff to rotate pattern 12 during formation of a ceramic shell mold thereon.
  • the lug further comprises a bore 16 formed centrally therethrough to intersect a pair of diametrically opposed bayonet-type locking slots 17, each comprising a vertically disposed portion 18 and an intersecting horizontally disposed portion 19, closed at one end thereof.
  • a pair of diametrically opposed driving and locking tabs 20 are formed on the lug to extend upwardly therefrom and in circumferentially spaced relationship relative to locking slots 17.
  • the handling rod assembly further comprises an elongated rod 21 having attachment means 22 formed on its upper end, adapted to attach the rod assembly to clamping fingers (not shown) of standard automated mold handling apparatus.
  • a mold attaching end 23 of the rod comprises a cylindrical portion 24 terminating at its lower end at a reduced extension 25 and at its upper end at an annular flange 26.
  • a hole 27, formed transversely through rod-portion 24, has a drive pin 29 press-fitted therein to have its free ends project radially outwardly from the rod.
  • a hole 30 is formed transversely through extension 25 and has a locking pin 31 press-fitted therein.
  • lug 14 having pattern 12 and cuff 13 pre-attached thereto, is selectively connected to rod assembly .10 to facilitate forma tion of a ceramic mold on the pattern in the manner described above.
  • sleeve 32 is manually retracted to compress spring 34 to expose extension 25 of rod 21 for telescopic engagement in bore 16 of connecting lug l4.
  • Thefree ends of lock pin 31 are then inserted into vertical slot portions 18 of locking slots 21 and the rod and lug are rotated relative to each other to seat the ends of the lock pin in-the closed ends of slot portions 19.
  • anti-rotation means for preventing both clockwise tab and slot connection formed on axially opposed ends of said lug and said sleeve.
  • the handling rod assembly of claim 3 further comprising an annular flange secured on said rod and a normally compressed coil spring mounted on said rod between said sleeve and said flange.
  • the handling rod assembly of claim 5 further comprising an elongated slot formed longitudinally through said sleeve to receive the end of said pin therein to form 'a lost-motion connection permitting limited axial movement, but for preventing relative rotation between said rod and said sleeve.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Soil Working Implements (AREA)

Abstract

A handling rod assembly comprises a rod having a connecting lug detachably mounted at its lower end to provide a drive connection between the rod assembly and a wax pattern pre-attached to the lug. The lug is detachably connected to the rod assembly by a bayonet connection and a pair of drive lugs which cooperate to prevent axial and rotational movement of the lug relative to the rod during spinning thereof. A coil spring is mounted on the rod to retain the drive lugs in driving engagement during such spinning.

Description

United States Patent Cowper m] 3,854,832 1451 Dec. 17,1974
[ HANDLING ROD ASSEMBLY FOR INVESTMENT CASTING MOLD [75] Inventor: Glenn Sherwin Cowper, Metamora,
Caterpillar Tractor Co., Peoria, 111.
Jan. 15, 1973 Assignee:
Filed:
Appl. No.:
US. Cl 403/349, 164/235, 403/354 Int. Cl. B25g 3/28, B22c 7/00 Field of Search 403/349, 354, 315, 316,
References Cited UNITED STATES PATENTS 10/1927 Davis 403/35 4 10/1942 Strunk et a]. 403/349 X 2,901,258 8/1959 Brandaji .1 403/349 X Primary Examinerl-l. Hampton Hunter Attorney, Agent, or Firm-Phillips, Moore, Weissenberger Lempio & Strabala [57] ABSTRACT A handling rod assembly comprises a rod having a connecting lug detachably mounted at its lower end to provide a drive connection between the rod assembly and a wax pattern pre-attached to the lug. The lug is detachably connected to the rod assembly by a bayonet connection and a pair of drive lugs which cooperate to prevent axial and rotationalmovement of the lug relative to the rod during spinning thereof. A coil spring is mounted on the rod to retain the drive lugs in driving engagement during such spinning.
7 Claims, 2 Drawing Figures PATENTEU DEC] 7 I974 sum 2 o 2 HANDLING ROD ASSEMBLY FOR INVESTMENT CASTING MOLD BACKGROUND OF THE INVENTION Automated handling apparatus for making ceramic shell molds normally comprise a handling rod assembly, including a connecting lug embedded in a wax cuff having a wax pattern secured thereto. The lug is threadably connected to an elongated rod of the rod assembly during formation of the mold, wherein the wax pattern is repeatedly dipped in a ceramic slurry to form a ceramic shell mold therearound. During such formation, the wax mold is elevated and twirled to evenly distribute a coating of the ceramic slurry therearound and to permit the run-off of excess slurry.
The mold is then rapidly spun in alternate directions for final removal of excess slurry and is thereafter dipped in a fluidized bed for drying purposes. Such spinning and abrupt reversal of the rod assembly tends to unscrew the threaded connection between the rod and the lug. In addition, manual threading of the rod and the lug together is unduly time-consuming, particularly when used in connection with high-speed auto,-
mated handling apparatus wherein time is of the essence.
SUMMARY OF THE INVENTION BRIEF DESCRIPTION OF THE DRAWINGS Other objects of this invention will become apparent I from the following description and accompanying drawings wherein:
FIG. 1 is a front elevational view of a handling rod assembly, having a cast cuff and pattern attached thereto; and
FIG. 2 is an exploded, isometric view of the handling rod assembly.
DETAILED DESCRIPTION FIG. 1 illustrates a handling rod assembly operatively connected to a wax pattern 12, simulating the crankshaft ofa fuel injection pump, by means ofa cast cuff .13. The cuff may be cast from any suitable material, such as wax or aluminum, and suitably secured to the upper end of the wax pattern. When the pattern and the cuff each constitute a wax material, thay may be bonded together at the wax interface therebetween.
A connecting lug 14 has an irregularly shaped head 15 formed thereon for embedment in the cast. cuff. The head thus provides a drive connection between the lug and cuff to rotate pattern 12 during formation of a ceramic shell mold thereon. The lug further comprises a bore 16 formed centrally therethrough to intersect a pair of diametrically opposed bayonet-type locking slots 17, each comprising a vertically disposed portion 18 and an intersecting horizontally disposed portion 19, closed at one end thereof. A pair of diametrically opposed driving and locking tabs 20 are formed on the lug to extend upwardly therefrom and in circumferentially spaced relationship relative to locking slots 17.
Referring to FIG. 2, the handling rod assembly further comprises an elongated rod 21 having attachment means 22 formed on its upper end, adapted to attach the rod assembly to clamping fingers (not shown) of standard automated mold handling apparatus. A mold attaching end 23 of the rod comprises a cylindrical portion 24 terminating at its lower end at a reduced extension 25 and at its upper end at an annular flange 26. A hole 27, formed transversely through rod-portion 24, has a drive pin 29 press-fitted therein to have its free ends project radially outwardly from the rod.
A hole 30 is formed transversely through extension 25 and has a locking pin 31 press-fitted therein. The
21 and for preventing axial movement therebetween. A
locking sleeve 32 is telescopically mounted on cylindrical portion 23 of the rod and has a pair of diametrically opposed and elongated slots 33 formed longitudinally therethrough.
As shown in FIG. 1, each of the slots receives a free end of pin 29 to form a lost-motion connection therebetween for permitting limited axial movement between the sleeve and rod, but for preventing relative rotation therebetween. A coil spring 34 is normally compressed between flange 26 and the upper end of sleeve 32 to provide releasable retaining means for bi asing the sleeve downwardly on the rod to ensure continuous axial engagement of locking tabs 20 in a pair of axially opposed and mating locking slots 36. Such tab. and slot arrangement thus comprise anti-rotation means, along with pin 29 and slot 33 for preventing both clockwise and counter-clockwise rotation of lug 14 relative to rod 21. During an investment casting process, lug 14, having pattern 12 and cuff 13 pre-attached thereto, is selectively connected to rod assembly .10 to facilitate forma tion of a ceramic mold on the pattern in the manner described above. In particular, sleeve 32 is manually retracted to compress spring 34 to expose extension 25 of rod 21 for telescopic engagement in bore 16 of connecting lug l4. Thefree ends of lock pin 31 are then inserted into vertical slot portions 18 of locking slots 21 and the rod and lug are rotated relative to each other to seat the ends of the lock pin in-the closed ends of slot portions 19. v
Sleeve 32is then released to allow locking slots 36 to engage locking tabs 20 to aid in preventing rotation of a rod having attachment means on its upper end adapted to attach the rod assembly to mold handling apparatus,
a casting connecting lug having an irregularly shaped head,
coupling means detachably connecting said lug to a lower end of said rod assembly and for preventing axial movement of said lug relative to said rod, and
anti-rotation means for preventing both clockwise tab and slot connection formed on axially opposed ends of said lug and said sleeve.
4. The handling rod assembly of claim 3 further comprising an annular flange secured on said rod and a normally compressed coil spring mounted on said rod between said sleeve and said flange.-
5. The handling rod assembly of claim 3 wherein said anti-rotation means further comprises a pin secured to I said rod to have an end thereof project radially through at least one side of said sleeve.
6. The handling rod assembly of claim 5 further comprising an elongated slot formed longitudinally through said sleeve to receive the end of said pin therein to form 'a lost-motion connection permitting limited axial movement, but for preventing relative rotation between said rod and said sleeve.
7. The handling rod assembly of claim 1 wherein said coupling means comprises a bayonet connection.

Claims (7)

1. An investment casting handling rod assembly adapted for use in making an investment casting mold comprising a rod having attachment means on its upper end adapted to attach the rod assembly to mold handling apparatus, a casting connecting lug having an irregularly shaped head, coupling means detachably connecting said lug to a lower end of said rod assembly and for preventing axial movement of said lug relative to said rod, and anti-rotation means for preventing both clockwise and counterclockwise rotation of said lug relative to said rod.
2. The handling rod assembly of claim 1 further comprising releasable retaining means for continuously maintaining said anti-rotation means in a locked position.
3. The handling rod assembly of claim 1 further comprising a sleeve telescopically mounted on said rod, said anti-rotation means comprising at least one mating tab and slot connection formed on axially opposed ends of said lug and said sleeve.
4. The handling rod assembly of claim 3 further comprising an annular flange secured on said rod and a normally compressed coil spring mounted on said rod between said sleeve and said flange.
5. The handling rod assembly of claim 3 wherein said anti-rotation means further comprises a pin secured to said rod to have an end thereof project radially through at least one side of said sleeve.
6. The handling rod assembly of claim 5 further comprising an elongated slot formed longitudinally through said sleeve to receive the end of said pin therein to form a lost-motion connection permitting limited axial movement, but for preventing relative rotation between said rod and said sleeve.
7. The handling rod assembly of claim 1 wherein said coupling means comprises a bayonet connection.
US00323937A 1973-01-15 1973-01-15 Handling rod assembly for investment casting mold Expired - Lifetime US3854832A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US00323937A US3854832A (en) 1973-01-15 1973-01-15 Handling rod assembly for investment casting mold
GB102974A GB1394565A (en) 1973-01-15 1974-01-09 Handling rod assembly for investment casting mould
JP49006691A JPS49101227A (en) 1973-01-15 1974-01-14

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US00323937A US3854832A (en) 1973-01-15 1973-01-15 Handling rod assembly for investment casting mold

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007929A (en) * 1975-04-18 1977-02-15 Rubin Figa Collapsible game racket
FR2348028A1 (en) * 1976-04-12 1977-11-10 Trw Inc PROCESS FOR MANUFACTURING A CERAMIC MOLD
US4064927A (en) * 1976-11-11 1977-12-27 Caterpillar Tractor Co. Standardized investment mold assembly
US4175392A (en) * 1976-04-16 1979-11-27 Nissan Motor Co., Ltd. Tandem master cylinder assembly
US4661009A (en) * 1986-03-12 1987-04-28 Grentek, Inc. Quick change coupling for machine tool arbors and the like
US4708511A (en) * 1986-07-23 1987-11-24 Motorola, Inc. Axial movement blocking apparatus
US4711596A (en) * 1985-02-14 1987-12-08 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Apparatus for securing a connection
US4810126A (en) * 1988-07-05 1989-03-07 Allied-Signal Inc. Compact oil slinger and spring loaded retention device
US4943182A (en) * 1988-03-14 1990-07-24 Ecia - Equipments Et Composants Pour L'industrie Automobile Rapid fastener of the bayonet type
US5002418A (en) * 1988-12-09 1991-03-26 Vsi Corporation Hold down device with extended capture pawl mechanism
US20040134314A1 (en) * 2003-01-09 2004-07-15 Cole Charles A. Radial indexing head tool with floating splined pin
US20050178249A1 (en) * 2003-01-09 2005-08-18 Cole Charles A. Radial indexing head tool with floating splined pin
US7137355B1 (en) * 2004-10-18 2006-11-21 Doskocil Manufacturing Company, Inc. Self-cleaning pet litter apparatus with rotating rake and pan
US20090242065A1 (en) * 2008-03-27 2009-10-01 Robert Whitling Small Handling Pole Locking Assembly
US20110085852A1 (en) * 2009-10-08 2011-04-14 Keith Ferrara Coupling devices and source assemblies including them
US20110089333A1 (en) * 2009-10-12 2011-04-21 Keith Ferrara Assemblies for ion and electron sources and methods of use
US20120102735A1 (en) * 2010-10-28 2012-05-03 Moreland Thomas R Method of forming a turbine engine component
US8424845B2 (en) 2008-07-21 2013-04-23 Indexable Tools, LLC Hammer and crowbar with adjustable claw
US8490250B2 (en) 2010-12-06 2013-07-23 Tcm Consulting Llc Interlocking extension poles and tool holder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1645802A (en) * 1925-06-09 1927-10-18 Lewis F Davis Deep-well pump-plunger attachment
US2299357A (en) * 1941-12-22 1942-10-20 Breeze Corp Coupling for rods and tubes
US2901258A (en) * 1957-09-30 1959-08-25 Brandafi Gabriel Drill press spindle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1645802A (en) * 1925-06-09 1927-10-18 Lewis F Davis Deep-well pump-plunger attachment
US2299357A (en) * 1941-12-22 1942-10-20 Breeze Corp Coupling for rods and tubes
US2901258A (en) * 1957-09-30 1959-08-25 Brandafi Gabriel Drill press spindle

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007929A (en) * 1975-04-18 1977-02-15 Rubin Figa Collapsible game racket
FR2348028A1 (en) * 1976-04-12 1977-11-10 Trw Inc PROCESS FOR MANUFACTURING A CERAMIC MOLD
US4175392A (en) * 1976-04-16 1979-11-27 Nissan Motor Co., Ltd. Tandem master cylinder assembly
US4064927A (en) * 1976-11-11 1977-12-27 Caterpillar Tractor Co. Standardized investment mold assembly
US4711596A (en) * 1985-02-14 1987-12-08 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Apparatus for securing a connection
US4661009A (en) * 1986-03-12 1987-04-28 Grentek, Inc. Quick change coupling for machine tool arbors and the like
US4708511A (en) * 1986-07-23 1987-11-24 Motorola, Inc. Axial movement blocking apparatus
US4943182A (en) * 1988-03-14 1990-07-24 Ecia - Equipments Et Composants Pour L'industrie Automobile Rapid fastener of the bayonet type
US4810126A (en) * 1988-07-05 1989-03-07 Allied-Signal Inc. Compact oil slinger and spring loaded retention device
US5002418A (en) * 1988-12-09 1991-03-26 Vsi Corporation Hold down device with extended capture pawl mechanism
US7156003B2 (en) 2003-01-09 2007-01-02 Cole Charles A Radial indexing head tool with floating splined pin
US6840141B2 (en) * 2003-01-09 2005-01-11 Brian T. Cole Radial indexing head tool with floating splined pin
US20050178249A1 (en) * 2003-01-09 2005-08-18 Cole Charles A. Radial indexing head tool with floating splined pin
US20040134314A1 (en) * 2003-01-09 2004-07-15 Cole Charles A. Radial indexing head tool with floating splined pin
US7137355B1 (en) * 2004-10-18 2006-11-21 Doskocil Manufacturing Company, Inc. Self-cleaning pet litter apparatus with rotating rake and pan
US20090242065A1 (en) * 2008-03-27 2009-10-01 Robert Whitling Small Handling Pole Locking Assembly
US8002491B2 (en) * 2008-03-27 2011-08-23 Ge-Hitachi Nuclear Energy Americas, Llc Small handling pole locking assembly
US8424845B2 (en) 2008-07-21 2013-04-23 Indexable Tools, LLC Hammer and crowbar with adjustable claw
US20110085852A1 (en) * 2009-10-08 2011-04-14 Keith Ferrara Coupling devices and source assemblies including them
US10978286B2 (en) 2009-10-08 2021-04-13 Perkinelmer Health Sciences, Inc. Coupling devices and source assemblies including them
US9349580B2 (en) * 2009-10-08 2016-05-24 Perkinelmer Health Sciences, Inc. Coupling devices and source assemblies including them
US8916821B2 (en) * 2009-10-12 2014-12-23 Perkinelmer Health Sciences, Inc. Assemblies for ion and electron sources and methods of use
US9263243B2 (en) * 2009-10-12 2016-02-16 Perkinelmer Health Sciences, Inc. Assemblies for ion and electron sources and methods of use
US9653274B2 (en) 2009-10-12 2017-05-16 Perkinelmer Health Sciences, Inc. Assemblies for ion and electron sources and methods of use
US20110089333A1 (en) * 2009-10-12 2011-04-21 Keith Ferrara Assemblies for ion and electron sources and methods of use
US8533947B2 (en) * 2010-10-28 2013-09-17 Pcc Airfoils, Inc. Method of forming a turbine engine component
US20120102735A1 (en) * 2010-10-28 2012-05-03 Moreland Thomas R Method of forming a turbine engine component
US8490250B2 (en) 2010-12-06 2013-07-23 Tcm Consulting Llc Interlocking extension poles and tool holder

Also Published As

Publication number Publication date
JPS49101227A (en) 1974-09-25
GB1394565A (en) 1975-05-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CATERPILLAR INC., 100 N.E. ADAMS STREET, PEORIA, I

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515

Owner name: CATERPILLAR INC., A CORP. OF DE.,ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515