US3166335A

US3166335A - Expanding mandrel assembly

Info

Publication number: US3166335A
Application number: US278065A
Authority: US
Inventors: William L Mason
Original assignee: Armstrong Cork Co
Current assignee: Armstrong World Industries Inc
Priority date: 1963-05-06
Filing date: 1963-05-06
Publication date: 1965-01-19
Anticipated expiration: 1982-01-19

Description

Jan. 19, 1965 w. L. MASON EXPANDING MANDREL ASSEMBLY Filed May 6, 1965 INVENTOR.

WlLLIAM L- MASON forward and effective, manner. plates an expanding mandrel assembly comprising in combination. a hollow, open-ended, cylindrical rubber sleeve 7 having raised flanges-at eachend'thereof. A pair ofcy-' R 3,166,335 Patented Jan. 19, 1965 nxrANnrNo MANDREL ASSEMBLY William L. Mason, Pequea Township, Lancaster County,

Pa, assignor to Armstrong Cork Company, Lancaster,

corporation of Pennsylvania 7 Filed May 6, 1963, Ser. No."278,065 I 4 Claims; (QL 2'79- -Z) 7 Pan, a

sleeve 1 and'the caps 4 and 5. Admission of air into the sealed chamber 6 may be accomplished by a shaft 'lhis invention relates generally to an expanding maridrel. assembly, and more particularly to an expanding. mandrel adapted to retain a bobbin. Still more particularly the invention relates to an expanding mandrel used particularly as aitwister on textile machinery in order that the bob-bin may be rapidly and easily placed on the mang tapered interior and must be forced onto} tapered driving. shafts in order to prevent slippage of the bobbin during rotation, Once the V bobbin has been forced on the shaft, it is often difiicult drel and removed therefrom. "The bobbins, now in use have a to remove. There is, therefore, a need for a device that It is the primary object of the present inventionj to supply such a device. It" is a further object of the present adapter 7 having an air conduit 8 leading 11011116 air outlet 9; The. shaft adapter 7 may then carry at the top thereof a screw seat 16 adapted to receive the [retaining screw 11 which holds the top cap 4 in position against the shaft adapter 7. The shaft adapter 7,is afiixed to the supporting hollow shaft 12 which is most conveniently :the shaft of an air motor, not shown, but the supporting shaft 12 may comprise any hollowshaft which is fixed or which is adapted to rotate and thus turn'the assembly of the caps 4 and 5 and-the sleeve 1.

The gaps 13 allow play'of theflanges 2 when the sleevelis in an expanded conditiomas shown in FIG. 2. Theover-all length of the sleeve-1 will generally run irom 1 inch to 2 inchesinlength, the thickness offthe flanges 2 will generally range from /8 to A inch and the i thickness of thebody of thesleeve will range from $4 to i will allow easy and rapidremoval and installation' of a high-speed bobbin used to'wind up threads and yarns on textile machinery.

invention to supply an expanding mandrel which, will quickly and tightly grip a bobbin placed thereon and which will allow "ready release of the bobbinonce 'the mandrel isreturned to a nonexpanded condition.

These objects are achieved in" a surprisingly straight- The-invention contemlindrical supporting caps havingshoulders adapted to receive the flanges on thesl'eeve are mounted on the open ends ofthe sleeve to form airtight seals at the ends. -Means for admitting air under pressure into" the sealed interiorof the sleeve is provided iii-order to cause the sleeve to expand and press against the interior of a bobbin.

Finally, there is preferably provided means} for rotating the assembly of the caps and expanded sleeve with the bobbin thereon. i

The inventionwill be more readily understood by ref;

erence to the accompanying drawings, inwhich: l

FIG. 1 is a longitudinal section of'thejassembly of the invention, i

7 FIG. 2 showsthe assembly of FIG. 1 wherein the is in an expanded condition, and

I ,FIG. 3 is an isomeric view of the sleeve itself.

Referring to the drawings, in which like parts havethe 2 same numbers, the rubber sleeve 1 has raised flanges 2lat I 5 inch. The sleeve and attendant flanges will be made of r ibber, natural or synthetic, preferably a cured rubber compounded with a suitable 'reinforcing'black, to allow repeated expansion andcontraction during the life of the sleeve. I .i

The caps 4 and 5, the shaft adapter 7,- and the motor shaft 12 may all be fabricated of any convenient materials, preferably metal Ordinarysteel has been ,successfully used for these parts. i

I claim:' l-. An expanding mandrel assembly comprising in combination a hollow, open-ended, cylindrical rubber sleeve having raised external flanges at each end thereof, a pair of supporting cylindrical caps having shoulders thereon adapted to receive said flanges, said shoulders having sufficient depth to form a gap between the outer. edges of said flanges andtheinner corresponding surfaces of said shoulders to allow said flanges to bend outwardly in the axial direotion'during expansion of said sleeve, the caps being mounted on the open ends of said sleeve to form airtight seals thereon, and means for admitting air under pressure into the sealed interior of said sleeve to cause said sleeve to expand, and supporting means for said caps and said expanded sleeve.

2. An assembly according to claim 1 in which said supporting means is adapted to rotate. "45,

3. An assembly according to claim 2 wherein said supporting means for rotating said caps and said expanded sleeve each end thereof. .The flanges 2 are an integral'part of v the sleeve 1 and are most conveniently constructed by removing a portion of the middle area of the'cylindrical .r sleeve 1; The'fianges Ziof the sleeve 1 are gripped byare, shoulders 3 of the top cap 4 and the bottom cap 5 This arrangement forms the sealed chamber 6 bounded bythe sleeve comprises the shaft of an air motor.

4. An assembly according to claim 1 wherein one of .saidacaps is supported by a transverse shaft adapter concentric in said sleeve. l

References Cited in the file of this patent I UNITED STATES PATENTS 1,367,808 Farrington Feb. 8,1921 2,490,472 Raske Dec..-6, 1949 2,583,117 Piperoux -1 Ian. 22, 1952 2,671,297 Arms Mar. 9,1954 2,876,961

Cole Mar. 10, 1959

Claims

1. AN EXPANDING MANDREL ASSEMBLY COMPRISING IN COMBINATION A HOLLOW, OPEN-ENDED, CYLINDRICAL RUBBER SLEEVE HAVING RAISED EXTERNAL FLANGES AT EACH END THEREOF, A PAIR OF SUPPORTING CYLINDRICAL CAPS HAVING SHOULDERS THEREON ADAPTED TO RECEIVE SAID FLANGES, SAID SHOULDERS HAVING SUFFICIENT DEPTH TO FORM A GAP BETWEEN THE OUTER EDGES OF SAID FLANGES AND THE INNER CORRESPONDING SURFACES OF SAID SHOULDERS TO ALLOW SAID FLANGES TO BEND OUTWARDLY IN THE AXIAL DIRECTION DURING EXPANSION OF SAID SLEEVE, THE CAPS BEING MOUNTED ON THE OPEN ENDS OF SAID SLEEVE TO FORM AIRTIGHT SEALS THEREON, AND MEANS FOR ADMITTING AIR UNDER PRESSURE INTO THE SEALED INTERIOR OF SAID SLEEVE TO CAUSE SAID SLEEVE TO EXPAND, AND SUPPORTING MEANS FOR SAID CAPS AND SAID EXPANDED SLEEVE.