US1871160A

US1871160A - Watchcase heater

Info

Publication number: US1871160A
Application number: US267584A
Authority: US
Inventors: Harold A Denmire
Original assignee: General Tire and Rubber Co
Current assignee: Aerojet Rocketdyne Holdings Inc
Priority date: 1928-04-05
Filing date: 1928-04-05
Publication date: 1932-08-09
Anticipated expiration: 1949-08-09

Description

H. A: DENMIRE 1,871,166

WATCHCASE HEATER Filed April 5, 1928 2 Sheets-Sheet l n r m INVENTOR HQmH HDenrnire ATTORN EYS H. A. DENMIRE WATCHCASE HEATER Filed April 5, 1928 2 Sheets-Sheet 2 INVENT OR BY H -benm W ATTORN EYS Patented Aug. 9, 1932 HAROLD A. DENMIRE, OF AKRON, OHIO, ASSIGNOR'TO THE GENERAL TIRE & RUBBER src COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

WAT CHCASE HEATER Application filed April 5,

This invention relates to vulcanizing apparatus and more particularly to a vulcanizing heater of the watch case type adapted for vulcanizing pneumatic tires, tire casings and inner tubes for use on motor vehicles.

An important object of the present invention is to provide a heater of the watch case type having annular mold sections together with fluid pressure means for pressing one mold section against the other during the vulcanizing operation in which means is provided for securely locking the hinged cover to the body of the heater by interengaging locking elements at the periphery of the body and also by interengaging locking elements within the mold annulus.

A further object of the invention is to provide a watch case heater in which the hinged cover is locked to the body of the heater by 80 a turning movement of the body portion about its central axis.

A further object is to provide a watch case heater which has a body portion which forms a support for the inner of the annular mold sections and which has an annular pressure chamber in which is mounted an annularpiston to which the inner mold section is attached.

A further object of the invention is to pro- 80 vide a watch case heater having a body portion provided with an annular pressure chamber in which the inner mold section is slidably mounted and a hinged cover which carries the outer mold section, both mold sections being provided with steam chambers for supplying heat to the walls of the mold and permanent steam connections being provided to the steam chambers of the two mold sections.

A further object of the invention is to provide a watch case heater having means for pulling the mold sections apart to break the adhesion between the vulcanized article and the walls of the mold prior to the release and opening of the cover. 1

With the above and other objects in View, the invention may be said to comprise a watch case heater as illustrated in the accompanyingdrawings hereinafter described and par 5 ticularly set forth in the appended claims 1928. Serial 110.26%584.

together with such variations and modifications thereof as will be apparent to one skilled in the art to which the invention appertains.

Reference should be had to the accompanye ing drawings forming a part of this specification in which:

Figure 1 is a top plan viewof a heater embodying the invention.

Fig.2 is a front elevation of the heater with the cover in closed-position. v Fig. 3'is a horizontal section taken on the line indicatedat 33 in Fig. 2, showing the cover in partially open position.

Fig. 4 is a vertical section taken on the line indicated at 4-4 in Fig. 2, showing the cover closed'and locked and themold'sections held together under'pressure.

Referring to the accompanying drawings, the watch case heater is mounted upon a suitable supporting frame or pedestal having a base land spaced

standards

2 and 3. At the upper end-ofthe standard 2, there is rigidly attached to the standard a tubu lar supporting member 4 which projects forwardly from the standard and provides a pivotal support for the' body portion 5 of the heater casing. The body portion 5 has at its center a forwardly projecting boss 6 which receives the tubular member 4, the forward end of which is threaded to receive a nut '7 and washer 8 by means of which the body member of the casing isheld in place on the supporting member. The body member 5 is of circular form having a forwardly projecting cylindrical flange 9 at its periphery and a forwardly projecting cylindrical flange 1O concentric with the flange 9 and spaced inwardly therefrom, the

flanges

9 and 10 forming the side walls of an annular'pressure chamber 11.

The outer flange 9 has at its outer-edge an outwardly oflset flange 12 which carries spaced inwardly projecting lugs 13. The inner flange 10 has at'its outer edge an inwardly offset flange 14 which carries spaced i11- Wardly projecting lugs 15.

The spaced

cylindrical flanges

9 and 10 of the body member form the inner and outer walls of the annular fluid pressure chamber 11 in which is mounted an annular piston watch case 16 provided along its inner and outer edges with suitable packing rings 17 to provide a fluid tight seal between the piston and the inner and outer walls of the chamber. Means is provided for admitting fluid under pressure into the chamber 11 between the piston and the rear end of the chamber and also for exhausting pressure from the chamber to draw the piston inwardly toward the rear end of the chamber. Fluid under pressure may be admitted to'the chamber 11 through pipe 18 controlled by a valve 18a and pressure may be exhausted from the chamber 11 by means of a pipe 19 connected to suitable suction apparatus and controlled by a valve 19a. An inner mold section 20 is rigidly attached to the annular piston 16 by means of bolts 21, the mold section being provided with a flat annular base 22 between which baseand the front face of the piston there is interposed a strip of suitable heat insulating material 23 such as asbestos for preventing the transfer of an excessive amount of heat from the mold section to the piston 16. The inner mold section 20 is provided on its outer side with an annular recess 24 which forms one half of the mold cavity and conforms to the tire casing or inner tube to be vulcanized. 1 In order to supply heat to the article inthe mold during the vulcanizing operation, the inner mold section is provided with a steam chamber 25 which conforms to the wall of the recess 24. The mold member 20 as well as the piston 16 preferably has a sliding fit in the annular chamber 11, being provided adjacent its outer face with hearing portions 26 which bear against the inner and outer walls of the chamber.

Means is provided for supplying steam to the steam chamber 25 and for draining condensates from the chamber, the steam and drain connections being permanent connections which do not interfere with the movement of the. mold section in the body portion 5 of the heater casing; Steam is supplied to the chamber 25 through a steam pipe 27 fixedly secured to the mold section adjacent the top thereof and condensates are drained from thesteam' chamber through a pipe 28 rigidly securedto the mold section adjacent the bottom thereof, the

pipes

27 and 28 projecting through elongated slots 29 in the outer wall.9 of the pressure chamber so as to permit inward and outward movements of'the mold section in the bod portion of the casing. r

The mold casing comprises in addition to the body portion 5 thereof, a closure member 30 which is provided with an integral hinge arm 31 which is pivoted on a vertical hinge pintle 32 carried by the standard 3 at the upper endthereof. 'The hinged cover 30 is of annular form and its external diameter is substantially the same as that of the body portion 4. The cover member 30 is formed to provide on its inner side an annular recess 33 having'an annular inner portion 34 which is of the same width and diameter as the chamber 11 and which has cylindrical inner and outer. walls which, when the closure member is in closed position, are in alinement with the inner and outer cylindrical walls ofthe pressure chamber 11. r

'lhe closure member is also provided along the innerrface thereof with outwardly projectin'g spaced lugs 35 which are adapted to enter between the spaced lugs 13 at the pe riphery of the body portion and also with inwardly projecting spaced lugs 36 which are adapted to enter .between the lugs 15 of the body portion. When the closure member is in closed position,the

lugs

35 and 36 thereof are positioned to the rear of the lugs 13 and 15- of the body portion and the closure member may be locked against outward movement by rotating the body portion about its pivotal support 4 through an angle sufficient to position the

lugs

35 and 36 behind the lugs 13 and- 15.

The annular recesses of the closure member 30 receives an outer annular mold section 37 which is rigidly secured to the cover member the mold section 37 fits within the annular inner portion of the recess 33, having bearing portions 39 which fit against the side walls of the recess. The outer mold section 37 is of substantially the same form as the inner mold section 20 and is provided with an annular recess 40, complemental with the recess 24 of the inner section and adapted to form therewith the annular mold cavity in which the article to be vulcanized fits. The outer mold section 37 is provided with a steam chamber 41 which conforms to the wall of the recess 40 and steam is supplied to this steam chamber through a pipe 42 rigidly attached to themold section and extending through the wall of the closure member 30. A steam pipe 42 is connected to the mold section adjacent the top thereof and a drain pipe 43 is attached to the mold section adjacent the bot tom thereof to drain the condensate from the steam chamber. j

Steamis supplied to the steam chambers of the inner and outer mold sections from a pipe 44 which is positioned in axial alinement with the hinge pintle 32 about which the closure member swings. The steam pipe 44 is connected by a swivel coupling '45 with a pipe 46 which is attached at its outer end to the pipe 42 attached to the outer mold section. The pipe 44 is also connected by a flexible hose 47 with pipe 27 attached to the inner mold section. The pipe 46 and swivel connection 45 provide a permanent connection between the steam pipe 44 and the steam chamber 41 of the outer mold section, the

by means of bolts 38. The inner portion of .9

pipe 46 moving with the closure member 30 as the closure member is moved between its openrand closed positions and the coupling 45 providing a connection between the steam pipe 44 and the pipe 46 to supply steam to the steam chamber during the vulcanizing operation. The flexible hose 47 provides a permanent connection between the steam pipe 44 and the steam chamber 25 of the inner mold section, the flexible hose 47 permitting the inward and outward movements of the inner section in the body member 5 of the casing and also permitting angular movements of the body member to'lock and unlock the closure member. The

drain pipes

28 and 43 for the

steam chambers

25 and 41 of the inner and outer mold sections are connected by

suitable hose connections

48 and 49 to a suitable drain pipe (not shown) and these hose connections do not interfere with the opening and closing movements of the closure member or with the movements of the body member and of the inner mold section in the body member.

In vulcanizingpneumatic tires, tire casings, innertubes or the like, it is customary to employ an air bag which fits within the hollow article being vulcanized and which is supplied with air or other fluid under pressure during the vulcanizing operation. As shown herein, the narrow pipe 50 extends through tubular supporting member 4 and at its forward end has connected thereto a short length of hose 51 to the outer end of which is attached a coupling member 52 by which the hose may be connected to the stem and an air bag to supply pressure to the air bag.

To turn the body portion 5 manually, a handle 53 is provided.

Provision is also made for mechanically turning the body portion 5 either in opening or closing the mold. The body portion 5 has a lug 54 connected by a pin 55, link 56 and pin 57 to a pistonrod 58. The piston rod 58 is attached to a piston (not shown) arranged to reciprocate within the cylinder 59. V The cylinder 59 is secured to the base 1 by bolts 60. The pipes 61 and 62 connect the interior of the cylinder 60 above and below the piston to three way valves 61a and 62a. Each valve 61a and 62a is connected to a source of hydraulic pressure through pipe 63. By manipulating the valves 61a and 62a, fluid pressure is admitted either above or below the piston, and the piston rod 58 acting through link 56 on lug 54 causes the body portion 5 to turn.

In the operation of the heater, a tire casing, inner tube or the like is placed in the recess 24 of the inner mold section and the closure member 30 is swung to closed position to confine the article to be vulcanized in the annular mold cavity provided between the mold sections by the

recesses

24 and 40. When the closure member 30 is in closed position, the body portion5 of'the casing may be turned about its pivotal support 4 to bring the

lugs

13 and 15 over the

lugs

35 and 36 of the closure member. The inner engaging lugs of the body portion and closure member may have interengaging wedgesurfaces to provide a tight interlock and to limit the turning movement of the body portion 5. After connecting the air hose 51 to the air bag, steam will be admitted to the

steam chambers

25 and 41 of the inner and-outer mold sections and fluid under pressure will be admitted through the pipe 18 to the interior of the chamber 11 behind the piston 16 to force the inner mold section into tight en gagement with the outer mold section.

It will be noted thatthe inner face of the outer mold section is spaced outwardly from the inner face of the closure member so that the inner mold section is moved partially into the recess of the closure member by the pressure within the chamber 11. The bearing portions 26 of the inner mold section fitting in the inner portion 34 of the recess 33 of the closure member firmly lock the closure member against opening movement and prevent opening of the closure member until the inner mold section is withdrawn therefrom by rearward movement in the chamber 11. w

After the article has been subjected to heat in the mold chamber for a sufficient time to complete vulcanization the inner mold section is moved inwardly in the chamber 11 by a reductionvof pressure in the chamber which may be obtained by closing the pressure pipe 18 and opening the suction pipe 19 to the chamber. This rearward movement of the inner mold section separates the two mold sections and breaks any adhesion there may be between the vulcanized article and the inner walls of the mold chamber. After the inner mold section has been withdrawn as above described, the body portion 5 of the casing may be turned by means of the handle 53 or cylinder 59 to release the

lugs

35 and 36 of the closure member, whereupon the closure member is free to open to permit removal of the vulcanized article from the heater.

It will be apparent that by providing a continuous interlock between the closure member and the body portion of the casing along both the inner and outer edges of the mold sections, a very firm support is provided for the outer mold section which will prevent the mold sections from springing apart at any point and will insure snug'engagement between the faces of the mold sections throughout. It will also be apparent that by providing an annular piston supporting the inner mold section and of substantially the same diameter as the mold section. fluid pressure is very effectively applied to the mold sections by reason of the large area of the piston subjected to fluid pressure.

fl? said body member, annular mold sections car- In addition, it"shouldbe noted that the'advantageous results above referred to are ob tained with a structure which is exceedingly simple and which can be manufactured at a low cost.

Furthermore, it is to be understood that the particular form of apparatus shown and described, and the particular procedure set forth, are presented for purposes of explanation and illustration and that various modifications of said apparatus and procedure can be made without departing from my invention as defined in the appended claims.

lVhat I claim is:

1. A watch case heater comprising a body member mounted to turn about a central axis and having an annular mold section mounted therein, a hinged closure member having an annular mold section therein which is complemental to the first mold sectionand adapted to engage therewith when the; closure member is in closed position, meanscontrolled by turning movement or" the body member for locking the closure member to the body member, and fluid pressure means for pressing one mold section against the other. I

2. A watch case heater comprising a body member mounted to turn about a central axis and having an annular mold section mounted therein, a hinged closure member supported independently of the body member and having an annular mold section therein which is complemental to the first mold section and adapted to engage therewith when the closure member is in closed position, said body member and closure member having integral 1'3? dially projecting interengaging lugs interiorly and exteriorly of the mold annulus for securing the closure member 1n closed position,

' means for turning the body member to engage or disengage said lugs and fluid pressure means carried by the body member for pressing the mold section carried by the body member against the mold section carried by the closure member.

3. Ina watch case heater, a body member mounted to turn about a central axis, acover member mounted to swing toward and from the body portion about an axis at right'angles to the first mentioned axis and at one side of said body member, complemental mold sectionscarried by the body portion and cover, circumferentially spaced lugs on said closure members, and circumferentially spaced lugs on said body member movable into locking engagement with the lugs of the closure member upon a rotative movement of the body member. 1

4. Ina watch case heater, a body member mounted to turn about a central axis, a cover member mounted to swing toward and from the body portion about an axis at right angles to the first mentioned axis and at one side of ried by the body and cover, circumferentially spaced lugs on the closure member outwardly of the mold annulus and other circumterem tially spaced lugs within the mold annulus, and circumferentially spaced lugs on the body member movable into locking engagement with said lugs of the closure member upon a rotative movement of the body member.

5. A Watch case heater comprising a body member having an annular fluid pressure chamber opening to the front face of the body member, an annular piston in said chamber, pressure and exhaust conduits connected to said chamber, rearwardly of the piston, aninner mold section having an annular recess on its outer side rigidly attached to said piston, said mold section having a steam chamber therein, a closure member mounted to swing into and out of engagement with the face of said body member, means for locking said closure member in closed position against the face of said body member, an outer mold section carried by said closure member, said outer mold section having an annular recess complemental to the recess of the inner mold section and adapted to form therewith an annular mold cavity, said outer mold section also having a steam chamber therein, and means for supplying steam to the steam chambers of said mold sections.

6. A watch case heater comprising a body member having an annular fluid pressure chamber opening to the front face of the body member, an annular piston in said chamber, pressure and exhaust conduits connected to said chamber, rearwardly of the piston, an inner mold section having an annular recess on its outer side rigidly attached to said piston, said mold section having a steam chamber therein, a closure member mounted to swing into and out of engagement with the face of said body member, means forlocking said closure member in closed position against the face of said body member, an outer mold section carried by said closure member, said outer mold section having an annular recess complemental to the recess of the inner mold section and adapted to form therewith an annular mold cavity, said outer' mold section also having a steam chamber therein, a steam pipe having a connection to the steam chamber of the inner mold section through the wall of said annular pressure chamber, and means including a swiveled coupling coaxial with the hinge ofthe clo sure member for supplying steam to the steam chamber of theouter mold section.

7. A watch case heater comprising a body member having an annular fluid pressure chamber, an annular piston in said chamber, an inner annular mold section carried by said piston, a hinged closure memberhaving an annular recess which,*inv the closed position of the closure memberis alined with said inner mold section and of a size to receive the same, an outer annular mold section fitting in said recess, the inner face of said mold section being spaced from the inner face of said closure member, and means for locking said closure member in closed position on said body member.

8. A watch case heater comprising a body member having an annular fluid pressure chamber, an annular piston in said chamber, an inner annular mold section carried by said piston, a hinged closure member having an annular recess which, in the closed position of the closure member is alined with said inner mold section and of a size to receive the same, an outer annular mold section fitting in said recess, the inner face of said mold section being spaced from the inner face of said closure member, means for locking said closure member in closed position on said body member, and means for controlling the pressure in said pressure chamber to move the piston and inner mold section toward and away from the outer mold section.

9. A watch case heater comprising a support, a body member mounted on said support to turn about a central axis, a closure member mounted on the support to turn about an axis at one side of said body member into and out of engagement with the body member, complemental mold sections carried by said body and closure member,

means con-trolled by turning movements of the body member for locking the closure member to the body member, and means for pressing one mold section against the other.

10. A watch case heater comprising a support, a body member mounted on said support to turn about a central axis, a closure member mounted on the support to turn about an axis at one side of said body member into and out of engagement with the body member, complement-a1 mold sections carried by said body and closure member, means controlled by turning movements of the body member for locking the closure member to the body member, and fluid pressure operated means carried by the body for pressing the mold section of the body against the mold section of the closure member.

11. A watch case heater comprising a support having spaced standards, a horizontal shaft carried by one standard, a vertical shaft carried by the other standard, an annular mold section mounted'to turn about its axis on the horizontal shaft, a complemental annular mold section mounted to swing about the vertical shaft into and out of engagement with the first mentioned mold section, means controlled by turning movements of the first mentioned mold section for locking the mold sections together, and means forpressing one mold section against the other. 7

12. A heater mold comprising a pair of mold section assemblies including respective mold sections adapted to mate with each other to define a mold cavity, one of said mold sections being slidably mounted in its assembly, a circumferential bayonet-type locking ring integrally formed on one of said assemblies, spaced locking lugs on the other of said assemblies arranged to overlap therewith, one of said assemblies being rotatable to lock said locking ring with said lugs to thereby prevent relative separational movement of said assemblies, and means for moving said slidably mounted mold section toward the other mold section for effecting a tight closure of said mold sections.

18. A heater mold comprising a casing fixed against axial movement, a swingable cover casing, a piston in said fixed casing, a pair of mold sections respectively carried by said piston and the cover casing, spaced radial inwardly-extending lugs formed integrally with said fixed casing, spaced radial outwardly-extending lugs formed integrally with said swingable cover casing and arranged to lie between and rearwardly of said first mentioned lugs, means for rotating one of said casings to bring said lugs in superposed relation to thereby lock said casings together, and fluid pressure means for moving said piston to bring said mold sections in closed mating relationship after said casings are locked together.

14:. A heater mold comprising a cylinder casing, a door casing hinged in a plane perpendicular to the axis of said cylinder casing, a piston in said cylinder casing provided with a coaxial annular mold section, a mating annular mold section carried by said door casing, lockingv means coaxial with said casings, and means for rotating one of said casings to move said locking means into operative relationship for holding said door casing and its mold section against the thrust of said piston and its mold section.

In testimony whereof I aflix my signature.

HAROLD A. DENMIRE.

circumferentially arranged