US1868791A

US1868791A - Vulcanizing system

Info

Publication number: US1868791A
Application number: US576312A
Authority: US
Inventors: Robert D Cleveland
Original assignee: Taylor Instrument Co
Current assignee: Taylor Instrument Co
Priority date: 1931-11-20
Filing date: 1931-11-20
Publication date: 1932-07-26
Anticipated expiration: 1949-07-26

Description

July 26, 1932- R. D. CLEVELAND 1,858,791

VULCANIZING SYSTEM Filed Nov. 20. 1931 .2 Sheets-Shea?l l lll! .5x/must AToRNEY uy 26, i932 R. D. CLEVELAND VULCANIZING SYSTEM Filed Nov. 20, 1931 Z'Sheets-Sheet 2 Pressure ATTORNEY ROBERT D. CLEVELAND, OF

Patented July v26, 1932 narran sia'issl sA'rENi" ori-ics noorins'rnn, New YORK, AssiGNonTo TAYLOR INSTRU- MENT COMPANIES, OF ROCHESTER, NEW YORK, A CORPORATION OFy NEW YORK f VULCANIZING SYSTEM Application filed November 2o, 1931. serial No. 576,312.` i

from the mold sections of a vulcanizing device.

At the present time individual tire and tube vulcanizers are arranged inja group or battery with a common header for' supplying the heating medium suchr as steam for m` the mold sections of the severalvulcanizers is, trap fails to function, the condensate will and with a common manifold through which the condensate formed in these sections by the cooling of the steam, passes to a single steam trap. It for any reason such a steam accumulate in the manifold and will back up into the several vulcanizers, thereb `re'-` ducing the temperature ,of the sections t ereof to a pointwherel imperfectcures are efected resulting in Vdefective tubes. Since' there are usually a large number of vulcanizers in a battery, the defective' opera# tion of the steam trap commonfthereto',` frequently'results in the production oia large number of defective tires or tubesbefore such faultyl operation is discovered.

ln accordance with the j present it is proposed automatically to exhaust the condensate from each vulcanizer into the open air at some period during its cycle of operation in forming a tube or tire.

` arrangement of' the present invention.

'cluding tire vulcanizers. i thepresent vulcanizer is more fully` disclosed l -Fig 1 is Other features oft-he invention willy appear from the detailed description and claims when taken with the drawings in which a side elevation oi a typical vulcanizerwith its controlling apparatus; Fig. 2 is a diagrammatic showing of this controlling apparatus and certain portions ofV the vulcanizer'; and Fig. 3V is a yvertical section oi a motor valve'suitable for use inthe Referring especially to Fig.. 1, 5 -designates a base or pedestalof an individual tube viulcanizer, although the invention isy applicableto' various types of vulcanizers inin the cop'ending application of Striclzlen and Fraine, Ser. #556,508, filedy Aug. 12, 1931, andl therefore the detailsof construcinvention, y

The structure"of tion and operation will be only generally" referred to. l, y

@n the upper end of the pedestal 5 there is mounted a diaphragm casing 6, on which' there is supported the kloosely, mounted or iioating lower mold section 7. This mold l.

There is also indicated a breech lock 17 thestructure and operationl oi' which are more clearly Vdisclosed in the mentioned copending application. For purposes of this description, it is suiiicient ,to state that a piston 18 (Fig. 2) operates withinthe cylinder 19 to rotate the breeclr lock 17 in one direction to lock the mold sections 7 and 9 iny engagement and in the reverse direction to unlock` them.k f n The mold sections fr' and 9 are hollow to receive a heating medium such as steam, fur` nished through a common steam supply line or header 20, conduit 21 leading to a 'port opening into the lower mold section 7 and thence through pivoted pipe section 23 and pivoted joint 24 to the' pipe 22 kpivoted in a port in the upper mold section 9 `and com" municating with the interior thereof. The steam condensate collecting in the hollow` moldsections during the operation of the vulcanizer iiows through the ports of the respecv.9()

pipes

22, 28 and 25, 264 are so pivotedinthis manner that steam mayl enter the mold sec! tions from steamv supply line 2O and conden-u Sate may Collect 111 einem Wahut-fnterer;

1 to the interior of theupper mold section. The,

,supply fluid pressure to the upper ing with the opening and the closing of the upper mold section. It will be understood that a three-way motor valve 37 (Fig. 3) having two

independent operating diaphragms

80 and 81 in its top, connects pipe 28 to its exhaust port or to manifold 29 which lead to a steam trap 30 of any well-known design.

In connection with the vulcanizer, there is provided a timing device including'

pilot valves

32, 33 and 34 (Fig. 2) which are actuated in accordance with a predetermined schedule by a time-controlled cam 35 and cam follower 36. These pilot valves cooperate in the control of

motor valves

37, 33, 39 and 40 to control the 7arious operations of the vulcanizer. lt will be understood that at the conclusion of each vulcanizing cycle, the fre-e end of the follower arm 36 engages the deepest cutting of the cam 35, as shown, so that the frame 41 operated thereby, is in a position to hold pilot valve 34 open, while tl e pilot valves 32 and are closed. At this time, therefore, fluid pressure passes from the supply conduit 42 through pilot valve 34, thence through conduit 43 to the top of the motor valve 40. This motor valve is thus operated and supplies fluid pressure from the supply conduit 44 to the upper side of the piston 15, (Fig. 1), causing it to move downward to its lowerinost position in the cylinder 16. As the piston 15 moves downward, the piston rod 14 linked to the arm 12 of the upper mold section swings this section on the pivot 10 to its open position where it remains until the beginning of the next cycle, since motor valve 40 continues to supply fluid pressure to the upper surface of piston 15. tiimultaneously conduit 43 and branch conduit 53 diaphragm of motor valve 37 so that this valve holds its exhaust port closed, while conduit 43 and branch conduit 49'supply fluid pressure to hold electropneumatic switch 50 open.

However, when it is desired to start the press, aft-er an uncured tube 59 has been inserted in the lower mold section and has been properly connected to the conduit for subsequent inflation, the operator then depresses the starting handle 46. The starting handle thus actuates exhaust valve 47 permitting the fluid pressure in conduit 43 and

branch conduits

58 and 49 to escape. This causes the motor valve 40 to release which, in turn, cuts off the fluid pressure supply from the upper part of the cylinder 16 above piston 15. liston 15 thereupon rises as the mold section 9 drops downward under the action of gravity. Likewise when the fluid pressure is relieved in conduit 43 and its branch conduit 53, motor valve 37 opens its exhaust port so th at any condensate that has collected in pipe 28 is blown into the atmosphere.

As is more fully disclosed in the mentioned copending application, when fluid pressure is relieved from the conduit 43 and branch conduit 49, the electro-pneumatic switch 50 completes a circuit through the conductors 51 and the clocli motor 52, to the source of current. Under the control of this circuit, clock motor drives the cam 35 in accordance with a predetermined schedule and as the follower arm 3G engages the inclined portion A of the cam 35, the frame 41 closes the pilot valve 34 and then opens the pilot valve ldfhen the pilot valve 33 is opened, it supplies fluid pressure from the fluid supply conduit 42 through

conduits

54 and 55 to the tops of the

motor valves

37 and 39. This actuates the lower diaphragm in the motor valve 37 thereby causing it to close its eX- haust port and to connect the pipe 28 through manifold 29 to the steam trap 30. Motor valve 39 is also actuated at this time and supplies fluid pressure from common supply conduit 44 through conduit 56 and then through branch conduit 57 to the right-hand end of the breech lock cylinder 19 (Fig. 2), causing the piston 13 to move toward the left (Fig. 2) for tie purpose of operating breech lock 17 to locl; the mold sections 7 and 9 closed` Similarly fluid pressure supplied to conduit 5G passes through the constriction 61 to the annular diaphragm 8 which diaphragm, it will be recalled, serves to bring the upper and lower mold sections tightly into registration.

"n the course of the rotation of the cam 35, its follower 36 in progressing up cam incline A, elevates the frame 41 still farther so that the pilot valve 32 is now opened, together with pilot valve 33 which has previously been opened. The opening of the pilot valve 32 supplies fluid pressure from the common source 42, through conduit 62, to the top of the motor valve 38. This valve is thus operated and supplies fluid pressure from conduit 44, through conduit 60 to inflate the tube 59 to which has been infeviously connected. The free end of the cam follower 36 now e gages the circular contour of the cam 35 thereby operating frame 41 to hold the

pilot valves

32 and 33 opened and pilot valve 34 closed until the end of the curing or vulcanizing period. Then when the follower 36 engages the lirst cutting B in the cam, following the circular portion, the frame 41 drops sufliciently so that the pilot valve 32 releases to cut off Huid pressure from conduit 62. This causes the motor valve 38 to close whereupon the tube 59 is deflated through conduit 60 and the exhaust port of motor valve 38. Subsequently, as the cam 35 advances farther the follower 3G drops into the second cam cutting C which closes pilot valve 33. This, in turn, closes motor valve 39 and permits the diaphragm 8 and the right-hand portion of the cylinder 19 to exhaust. Also when the pilot valve 33 closes, the fluid pressure which has been applied through conduit 54 to the lower diaphragm of motor valve 37 during the curing period, is relieved and this motor valve disconnects the pipe 28 from the manifold 29 'leading to steam trap 30 and connects it to the motor valve exhaust port so that any condensate that has. formed in the mold sections, is blown into the open air. The cam 35 continues to rotate until the follower 36 advances into the lowerinost cam cutting corresponding to the normal position, then frame 41 drops to'a position to open the valve 34 whereupon fluid pressure is supplied from the source 42 through conduit 43 to the top of the motor valve 40. Thisk motor valve supplies pressure from the source 44 through conduit 63 to the lleft-hand side of cylinder 19, whereupon the piston 18 moves the breech lock 17 to a position to unlock the mold sections. Fluid'pressure in conduit 63 is also supplied through the constriction 64 to the top side of piston 15 moving it downward with a consequent opening of the upper mold section. It should be stated thatthe4 constriction 64 serves to delay the action of the piston 15 until the breech lock has been moved to a position to unlock the sections. Fluid pressure in branch conduit 49 keeps the electropneumatic switch 5() open which fluid pressure in branch conduit 58, keeps the motor valve 87 operated so that its' exhaust port is closed.

From the foregoing it will be seen that the motor valve 37 functions to exhaust condensate accumulating in the pipe 28 and the mold sections 7 and 9, both at the beginning and at the end of the curing cycle. In the first instance, this condensate is blown out of the pipe 28 during the time-that the upper mold section is closing and until the pilot valve 33 opens to operate the breech block and to inflate the diaphragm. Pipe 28 is also blown out at the conclusion of the curing cycle in the interval while the breech lock 17 is being unlocked. By this arrangement the interiors of the mold sections are maintained substantially free from condensate and these sections are therefore at the proper temperature for curing, thereby obviating an important cause of defective tubes.

lliile the invention has been disclosed in connection with a tube vulcanizer, it will be readily appreciated that it may be appliedrto any other vulcanizing device operating according to a predetermined time cycle.

I claim: l

1. In a vulcanizing system, a vulcanizer including hollow mold sections arranged to be heated by hot vapor, means including a fiuid pressure operated motor valve for exhausting condensate from said mold sections,

means including a second fluid pressure oper-V ated motor valve for controlling the opening and closing of said mold sections, conduits normally applying iiuid pressure to said motor valves, and a manual device for relieving the iuid pressure in said conduits.

2. In a vulcanizing system, a vulcanizer including hollowmold sections arranged to be heated'by hot vapor, means including ay motor valve for exhausting condensate fromk said mold sections, operating mechanism for said vulcanizer,ineans including a regulating device for controlling said operating `mechaf nismin accordance with time, and lmeans including said regulating Vdevice for con-V trolling the operationof said motor valve.

8. `Ina system of the class described, a vulcanizer including hollow mold sections larranged to be heated. by hot vapor, an outlet for ea'climold section, ymeans including a motorvalve for opening and closing a concludi ng said regulatingdevice for controlling the operation of said motor valve.

Ina system of the class described, a vulcanizer including hollow mold sections arranged to be heatedby hot vapor,an outletr for each mold' section, operating mechanism for said vulcanizer, a conduit common to said outlets, a `motor valve controlling the opening of said conduit, means' including a time cycle device for controlling `said operating lmechanism in' accordance with time to determine a vulcanizingcycle, and means including said device for oper ating said motor valve durinO a ortion of a vulcanizinfr` c cle.

5. Iii-a system of thel class described, ay

vulcanizer including hollow mold sections arranged to be heated by hot vapor, operating mechanism for said vulcanizer, means including a` motor valver controlling. the exhausting of condensate from said sections, means including a timecycle device for controllinggsaid loperating mechanism in accordance-with time-to determine a vulcanizing cycle, and means including said device for controlling said motor valve during a portion of a vulcanizing cycle. f

6.v In a vulcanizing system, a vulcanizer including hollow mold sections arranged to b-e heated by hot vapor, each mold section being provided with an outlet` operating mechanism for said vulcanizer, a manifold, meanslinc'luding ay motor valve for connecting said outlets alternately to said manifold and -to the atmosphere, mea-iis including va regulating devicefor controlling said operating mechanism in accordance ,with time, and means including said regulating device for controlling the operation of said motor valve. f

7.InV asystem of the class described, 'a vulcanizer including yhollow mold'f sections arrangedto be heatedby steam, an outlet'fo'r each 'mold section, a conduit common to said outlets, anda valve controlling the opening o-f `said conduit 'to the atmosphere, mechanism for controlling the closing of said mold sections, mechanism tor locking said sections in closed condition, a time cycle device controlling the operation oi said mechanisms,

and means responsive to said device for opening said valve to the atmosphere.

8. In a system of the class described, a vulcanizer including hollow mold sections arranged to be heated by steam, an outlet for 4each mold section, a conduit common to said operation of the mold sect-ions and the lockmg of the same.

9. ln a system of the class described, a vulcanizer including hollow mold sections arranged to be heated by hot vapor, an outlet for each mold section, operating mechanism for said vulcanizer, means includinfy a motor falve controlling the connection of said outlets to t-he atmosphere, means including al time cycle device for controlling said operating mechanism in accordance with time to determine a vuleanizing cycle, and means including said device for operating said motor valve at the beginning and at the end of each vulcanizing cycle.

lO. In a system of the class described, a vulcanizer including hollow mold sections arranged to be heated by steam, means including a motor valve for exhausting condensate from said mold sections, mechanism i"or controlling the closing of said mold sections, mechanism for locking said sections in closed condition, a time cycle device controlling` the operation of said mechanisms, and means responsive to said device for operating said valve.

ll. ln a system of the class described, a vulcanizer including hollow mold sections arranged to be heated by steam, means including a motor valve for exhausting condensate from said mold sections, mechanism for controlling 'the opening and the closing of said mold sections, mechanism for locking said sections in closed condition, a time cycle device controlling the operations of said mechanisms and means responsive to said device for opening said valve to the atmosphere during aV portion or" the interval between the operation of said mechanisms.

l2. In a system of the class described, a vnlcanizer including hollow mold sections arranged to be heated by steam, an outlet for each mold section, aV conduit common to said outlets, a steam trap connectible to said conduit, a motor valve in one of its positions serving to connect said conduit to the atmospliere and in another of its positions to said steam trap, said valve being provided with two actuating diaphragme, a fluid-pressure controlled device for normally holding the mold sections in open relation, one of said diaphragms being supplied with fluid pressure in common with said device, a fluid pressure controlled device for locking said sections closed, said second diaphragm being supplied with fluid pressure in common with said locking device, the application ot iiuid pressure to either of said diaphragms serving to close said conduit to the atmosphere, and means for controlling the application of fluid pressure to said devices and to said diaphragms.

ln testimony whereoiC l alliX my signature.

ROBERT l). CLEVELAND.

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