US1140577A - Heel-pad mold. - Google Patents

Description

S. COOKE & W. C. DAVIS.

HEEL PAD MOLD.

kPPLICATION FILED MAR 24' I911.

Patented May 25, 1915. EETS-SHEET I.

s. COOKE &w. c. DAVIS.

HEEL PAD MOLD. APPLICATION FILE-D MAR. 24, 1911.

Patented May 25, 1915.

4 SHEETSSHEET 2.

3. 000m: & w. c. DAVIS.

HEEL PAD MOLD.

APPLICATION FILED MAR. 24, 1911.

I Patened 25,1915.

I & Z- I a r \y/i k a ,e' @Qfi S. COOKE & W. C. DAVIS.

HEEL PAD MOLD.

APPLICATION FILED MAR. 24, 1911.

, 140,577. Patented May 25, 1915.

4 SHEETS-SHEET 4.

seiirtrnr oookn AND EWILLIAMCHARLES DAVIS, or GORTON, MANCHESTER, ENGLAND.

'* HEEL-PAD MOLD.

Specification of-Letters latent.

Patented May 25, 1915.

Application filed March 24; 1911. Serial No.- 616,721.

T all whom it may concern *Be it known that'we, SA-Morn Coons and WVILLIA G ARLEsDavis, both subjects of the Kingof- Great Britain and'Ireland, and l' have invented a certain new and England,

residents of Gorton, Manchester,

Improved At: present White metal molds made in one piece;and" produced by casting are used in the moldingbf indie-rubber heel pads,

and witlrsuch construction of'moldsvul "canized' india-rubber of good quality,

as is obtaineduf'rom dis-used cab'or bus frequired, be used in the making of the pads such tires, cannot, owing to I the high pressure Without the risk of the=mold bursting. "A" further' object is that there is always a spew orraw'edge around thepad when molded, this being manner in which the top of the mold is closed in.

" This invention has for its object to pro videamold, and to effect the moldingoperation,rwhereby a pad can'be" molded from wvulcanized india-rubberof good quality without I risk of the mold bursting,

whereby the pad shall be 1 any" spew on the edges,-

and molded without Which'will thus do away with the labor "heretofore involved trimmingup the pads by hand.

U on the accompanying-drawingsFigure 1 illustrates an exterior elevation of a mold made according 'to this invention and showing the ram .or plunger about to "mold. -Fig.'2'=illustrates a se'ctional'elevati'on of themold, and with the'ramor plunfgethier. Figs." 5, 6 and 7 illustrate *sectiona wherein a 861188 of molds are-clamped to- 1 further possesses tion.

ger loweredtherein. 'Fig. 3 illustrates a plan; of-the-rnold. Fig, 4 illustrates a press elevations. of modified forms of molds. Fig.

I j 8 illustrates a planof- Fig. 7. Fig: 9"is a similar View to F1gsf'5, 6 or 7 andillustrates a further-modification. Fig. lOis a plan of a detail shown in Fig. 9, while Figs.

" Hand 12 illustrate still further modified forms or arrangements of mold.

' Referring now to Figs. lto' lythe-m'old whichis'made oi'steelcomprises three parts,

a, the base part, which is in the form, ofva plate, I), the central and forms the bottom part, which is raised face of the mold, and c,- aring which forms-the vertical wall of the anold.

owing to the imperfect enter the I The ring 0 at its, base fits concentrically around the part b and is designed to receive a ram or plunger d which has a neat pistonli ke fit and designed to slide within the ring 0. i

The central raised part I) of the plate a is suitably engraved or formed with any desired pattern, decoration, brand -or name wi'tl1which the finished pad may require to be made.

Inmaking pads vith a mold constructed as described the piece of india-1'ubber-,\vhich has previously been cut to the approximate size and shape, is, with the ram or plunger 01 removed, inserted in the ring 0. The ram or plunger cl is then placed in position on the india-rubber in the ring 0, the top surfaceof the rubber lying just below the top of the ring, and the mold thus charged,

withthe ram in position projecting above the ring, placed under a screw or other form of press .for giving the necessary pressure to force down the ram or plunger and ress theindia-rubberwithin the mold into the required shape. After this operation the mold'is then subjected. to heat and further pressure in the usual way, and the pad is caused to soften and become permanently molded to the requisite shape and design. When the molding has-been efiected the ram dis removed from the ringa and this latter removed from the platen, notches, proan annular recess 0 jections or, preferably,

in the ring permitting of a suitable tool being inserted for this purpose.

' Usually thepad plate a with the ring c, but, when taken out of the ring, the pad will be without spew or raw edge, which is common with the ordinary and present style of molding, and

a solid and regular formaclamping plates, see Fig. 4, the platea of one mold resting or pressing'on the ram (I of anothermold, and the rams 03 being of 9D will be removed from the v the ring 0 and be'capable of freely stead of having a raised central part, have the pattern, name or other matter formed.

; in the face,-and the ring heldto the plate a by pegs or dowels e. r g be recessed or sunk, and permitof the ring wherein a loose part or plate I) may be used,

' the ring is held in position by pegs or pro- The plate a mayalso 0 fitting within such recess, see Fig. 6...

In the modification shown in Figs. 7 and 8 the plate a may be provided with a series of I pegs or projections f preferably four, andthe raised portion of the plate may be omitted. g

Fig. 9 shows a still further modification Fig. 10 showing a plan of said plate detached.

In Fig. 11 the plate a is shown recessed instead of having a raised or loose part, and

jections f in similar manner to Figs. 7 and 8. Obviously, it will be understood that the arrangement and fitting of the plate a and ring a to each other may be modified in various ways, while further, it will be understood, that the ram or plunger may be arranged below, instead of above the mold,

see Fig. 12.

The improved mold may" housed in the making of heel pads and the like from other than vulcanized rubber.

What we claim is A mold for .use in molding heel pads. and

the like from waste, vulcanized india rubber comprising, in combination, a steel base part having holes for rods to pass through where by a'series of molds may be held one above" .another, 'astraight, parallel-sided cylinder restingon said .base part and having an annular recess 1n 1ts-'periphery-at its lower edge, a circular boss integral with-the base part projecting into and closely fitting the lower end-of thesaid cylinder, a further boss integral with and central to the said circular boss and having a raised central conical part a solid steel piston the said cylinder 0 uniform diameter, against the top ofwhich the baseopart of the 'mold abovemay'bear when a series of molds are placed one above another and which stands above the .cylinder whenthe moldis in use, and is of a length which allows ofa full pressing operation to ,be performed before the base part of I the mold above can touch the top of thecylinder, substantially as herein set forth.-

In witness whereof we haye hereunto set our hands in the presence of two witnesses.

SAMUEL COOKE. CHARLES Witnesses I; D. Burma.- 1 p R0 P l-mam ems;

.- sem Copies ofthia' patent may be obtained for fivelcents feab by a'tl dressing the f'Gonimi ssioner ofTatentl, I

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