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Unified Apparatus For Tire Vulcanizing And A Method Thereof

Abstract: The present invention provides an apparatus and a method for vulcanization of a tire, wherein the apparatus is comprises a unified mechanism integrating a segment mold actuator, a center mechanism and a bead lift actuator mechanism. The segment tire mold, for loading a green tire, is an inverted type, having plurality of movable segment. The segment mold actuator comprises at least one hydraulic cylinder so to expand and/or retract a segment tire mold and provide a tread pattern shape to a cured tire by providing radial movement of the movable segments. The center mechanism comprises: at least one piston rod actuator so as to actuate a variable movable piston rod controlling a bladder; at least one linear variable displacement transducer sensor; and at least one bead lift actuator cylinder, to eject a cured tire from said inverted type tire segment mold.

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Patent Information

Application #
Filing Date
06 May 2015
Publication Number
47/2016
Publication Type
INA
Invention Field
MECHANICAL ENGINEERING
Status
Email
cal@patentindia.com
Parent Application
Patent Number
Legal Status
Grant Date
2023-01-09
Renewal Date

Applicants

LARSEN AND TOUBRO LIMITED
L&T Rubber Processing Machinery, Chennai-Bangalore Highway, Post Bag No. – 2, Vedal-631561, Kanchipuram, TamilNadu, India

Inventors

1. SAFAVAT, Murali Nayak
Flat no:19, Door No:G1, Aruna Flats, Mangala Nagar, Fourth Cross Street, Porur, Chennai-600116 Tamil Nadu, India
2. MAHMOOD, Mohamed Ibrahim Thakkadi
3/192 A, Bismillah Nagar, Vettuvankeni, Injambakkam, Chennai - 600041 Tamil Nadu, India
3. SALEMMOHAN, GowriPrashanth
Oldno:50, New No:67, Narayana Nagar, Fourth Cross street, Salem - 636015 Tamil Nadu, India
4. PONNUSAMY, Sakthivel
3-216/177, Palaiyur Bus Stop, MGR Statue Opp., Ayyamperumampatti (PO), Salem - 636302 Tamil Nadu, India
5. RAJENDRAN, Suresh
F-2, AI-129, 8th Main Road, Anna Nagar, Chennai - 600040 Tamil Nadu, India
6. VENUGOPAL, Rajkumar
10/40A, S.S Puram Main Road, Bodinayakanur, Theni (Dt.) - 625513 Tamil Nadu, India

Specification

DESC:TECHNIAL FIELD OF THE INVENTION

[001] The present subject matter described herein, in general, relates to machinery for manufacturing tires in motor vehicles of nearly all sizes and more particularly, to an apparatus and a method for utilization in tire curing presses for shaping and curing tires.

BACKGROUND OF THE INVENTION

[002] Tire manufacturing process includes mechanism for production and thereby mixing of the raw materials such as natural rubber, synthetic rubber, carbon black, sulphur and zinc oxide, as to fabricate various parts of the tire separately. The various parts are subsequently assembled into a single tire form using a building machine. The tire formed thus is referred to as the green tire (raw tire). The green tire is accordingly shaped and cured in a vulcanization process, so as to obtain a finished tire/cured tire.

[003] During the vulcanization process, the green tire is loaded in a segment mold or a two piece mold and thereby compressed and/or expanded by using bladder that applies high-temperature, high-pressure vapour, from the inner side so as to obtain a specific shape of the tire. The heat and pressure cause the rubber and sulphur molecules to bond, so that the rubber in the green tire acquires a higher elasticity and durability. During this process, the final shape of the tire and the pattern on the tread (tread pattern) are also formed by the segment mold. It is the moment that the vulcanized tire comes out of the segment mold or a two piece mold that the tire product is completed.

[004] The major tools involved during the vulcanization of the green tires include, but not limited to, center mechanism, bead lift assembly and segment mold actuator, for shaping and curing tires. The center mechanism and bead lift assembly are together called as bladder control mechanism or bag control mechanism. The purpose of the center mechanism is to supply and drain a curing media to the bladder as well as to control the bladder to mold the green tire so as to obtain a finished tire/cured tire. The bead lift assembly is enabled to unload the finished/cured tire from the segment mold. Conventionally, as shown in figure 1, the molding and shaping of green tires to obtain a finished tire/cured tire, is performed using three separate apparatus wherein one apparatus is used for controlling the bladder, usually center mechanism which is located on the base; wherein the base is the stationery member in the tire curing press and another for apparatus mechanism for actuating segment molds, usually segment mold actuator which is located on the top link, wherein top link is the moving member in tire curing press. And third apparatus is a bead lift mechanism for unloading the cured tire from the segment mold.

[005] Due to the heavy weight of segment mold, it is very difficult to mount on the top side of the press. The heavy moving mass causes fatigue and loss of accuracy in machine over a period of time, difficulty in maintenance and high human risk while segment mold change. Further, the existing apparatus for tire curing press for shaping and curing tire includes the following drawbacks:

1. Heavy machine structure and high torque motor required for press open and close,
2. Mold positioning accuracy will differ during press opening/closing fatigue cycle,
3. Mold set-up time and maintenance time is high,
4. Human safety while lifting and fixing the mold on top,
5. Bladder position control by manually placing the spacers on the bladder control mechanism, and
6. Increased assembly time.

[006] Thus, in view the hitherto drawbacks, there is a need to provide an improved tire vulcanization mechanism so as to overcome the drawbacks of the conventional tire vulcanization apparatus.

SUMMARY OF THE INVENTION

[007] The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the present invention. It is not intended to identify the key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concept of the invention in a simplified form as a prelude to a more detailed description of the invention presented later.

[008] The main object of the present invention is to provide an improved and a simple apparatus for vulcanization of tire with an integrated mechanism having a segment mold actuator, center mechanism and a bead lift actuator.

[009] Another object of the present invention is to provide an integrated mechanism in a tire vulcanization apparatus and method, for controlling bladder, ejecting cured tire from two piece molds as well as actuating the segment molds

[0010] In accordance with the first aspect, the present invention provides an apparatus for utilization in tire curing presses for shaping and curing tires.

[0011] In accordance with the first aspect, in one implementation, the present invention provides an integrated mechanism for vulcanization of tire, said integrated mechanism comprising:
a segment mold actuator, comprises at least one hydraulic cylinder to actuate at least one mold tube assembly to expand and/or retract at least one tire segment mold;
a center mechanism, comprises:
at least one piston rod actuator, to actuate a variable movable piston rod to expand and/or retract at least one bladder, said bladder is adjusted by means of a top clamp ring at one end and a bottom clamp ring at other end;
at least one lower clamp ring hub, to clamp said bottom clamp ring of the said bladder;
at least one linear variable displacement transducer sensor to detect at least one positional feedback and/or control displacement of said vertically movable piston rod; and; and
at least one bead lift actuator cylinder, to eject a cured tire from said inverted type tire segment mold.

[0012] In accordance with the first aspect, in second implementation, the present invention provides an apparatus for vulcanization of at least one tire, said apparatus comprising:
at least one tire segment mold having an operably expandable opening to receive said tire for curing;
a bladder assembly, comprises at least one bladder coupled to at least one mold tube assembly, said bladder is adjusted by at least one top clamp ring at one end and at least one bottom clamp ring at other end;
said mold tube assembly to operate said tire segment mold and/or bladder assembly, wherein said mold tube assembly includes an integrated mechanism comprising:
at least one segment mold actuator, having at least one hydraulic cylinder to actuate said mold tube assembly to expand and/or retract said tire segment mold and thereby elevate at least one lifting/mold plate by actuating said ring assembly; and
a center mechanism comprises: at least one piston rod actuator to actuate at least one vertically movable piston rod to expand and/or retract said top clamp ring and said bottom clamp ring; at least one lower clamp ring hub, to clamp said bottom clamp ring; at least one linear variable displacement transducer sensor to detect at least one positional feedback and/or control displacement of said vertically movable piston rod; and at least one bead lift actuator cylinder to unload a cured tire.

[0013] In accordance with the first aspect, in second implementation, the apparatus provides movement to segmented tire mold wherein a plurality of circumferentially arranged segments that contribute to the forming of the circumferential tread portion of a tire being molded are able to move in such a way as to include a radial component of motion that provides a larger diameter for each of the segmented mold portions during the green tire loading and unloading operation.

[0014] In accordance with second aspect, the present invention provides a method for vulcanization of a tire using an apparatus, said method comprising:
· expanding, by using a segment mold actuator coupled to a mold tube assembly of said apparatus, at least one tire segment mold having plurality of movable segments;
· elevating, by using said segment mold actuator, a mold plate to provide an outer diameter clearance for placing at least one green tire or uncured tire;
· extending, by using variable movable piston rod, at least one bladder to provide a center bore clearance for placing at least one green tire
· loading, by using vertical chuck loader or crane, said green tire on said inverted type tire segment mold for curing;
· actuating, by using a piston rod actuator, a vertically movable piston rod and thereby expanding, by using said piston rod, a bladder to receive and/or drain a curing media using at least one pipe;
· placing, by using at least one mechanical linkage, a top chamber over a bottom chamber of said apparatus, for said curing;
· supplying, by using said pipe, said curing media to said bladder for curing said green tire loaded;
· curing, by using said curing media stored in bladder, a green tire to provide a final shape to a cured tire;
· providing, by means of pressure from the inner side of the bladder by the said cure media, a tread pattern shape on a circumference of said cured tire;
· detaching, by using a variable movable piston rod, said bladder from the said cured tire;
· ejecting, by using the said bead lift actuator, said cured tire from the said mold;
· unloading, by using vertical chuck loader or crane, said cure tire

[0015] Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

[0016] The above and other aspects, features, and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings in which:

[0017] Figure 1 illustrates a conventional tire vulcanization apparatus.
[0018] Figure 2 illustrates across-sectional front view of steam box in closed condition along with mold height adjustment screw nut arrangement, tire segment mold and inverted and integrated center mechanism and segmented mold actuator, in accordance with an embodiment of the present subject matter.
[0019] Figure 3 illustrates a cross-sectional front view of steam box in opened condition along with mold height adjustment screw nut arrangement, tire segment mold and integrated bladder control mechanism and segmented mold actuator, in accordance with an embodiment of the present invention.
[0020] Figure 4 illustrates across-sectional front view of inverted and integrated bladder control mechanism and segmented mold actuator ready for green tire loading, in accordance with an embodiment of the present invention.
[0021] Figure 5 illustrates a cross-sectional front view of inverted and integrated bladder control mechanism and segmented mold actuator with plurality of segments expanded, bladder extended and lower ring lifted condition, in accordance with an embodiment of the present invention.
[0022] Figure 6 illustrates a cross-sectional side view of inverted and integrated bladder mechanism and segmented mold actuator with plurality of segments expanded, bladder extended and lower ring lifted condition, in accordance with an embodiment of the present invention.
[0023] Figure 7 illustrates an inverted type tire segment mold having plurality of movable segments, in accordance with an embodiment of the present invention.
[0024] Figure 8 illustrates a unified apparatus with a bladder control mechanism and segment mold actuator, in accordance with an embodiment of the present invention.
[0025] Figure 9 illustrates a view of an integrated mechanism having segment mold actuator and bladder control mechanism, in accordance with an embodiment of the present invention.

[0026] Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure. Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

[0027] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary.

[0028] Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0029] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.

[0030] It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.

[0031] By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.

[0032] Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.

[0033] It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

[0034] The term like “upper” and “lower” can be interchangeably used for “top” and “bottom” and vice-versa.

[0035] In one implementation, the present invention provides a method and an apparatus for providing the lower portions of a tire segment mold with an expansible opening to provide clearance for the insertion of a green tire and unload a cured tire, in particular large tires of the sort used on agricultural, industrial and off-road vehicles. The apparatus according to the present invention may provide movement to the segment tire mold wherein a plurality of circumferentially arranged segments that contribute to the shaping of the circumferential tread portion of a tire being molded are able to move in such a way as to include a radial component of motion that provides a larger diameter for each of the segmented mold portions during the green tire loading and unloading operation.

[0036] Referring now to figure 2 and figure 3, the cross-section view of the tire curing press apparatus in a closed condition and in an open condition respectively is illustrated.

[0037] Referring now to figure 4, a cross-sectional front view of inverted and integrated center mechanism and segmented mold actuator ready for green tire loading is illustrated. In one implementation.

[0038] Referring now to figure 5, a cross-sectional front view of inverted and integrated center mechanism and segmented mold actuator with plurality of segments expanded, bladder extended and lower ring lifted condition is illustrated.

[0039] Referring now to figure 6, a cross-sectional side view of inverted and integrated center mechanism and segmented mold actuator with plurality of segments expanded, bladder extended and lower ring lifted condition is illustrated.

[0040] Referring now to figure 7, an inverted type tire segment mold with plurality of movable segments is illustrated.

[0041] Referring now to figure 8, a unified apparatus with a bladder control mechanism and segment mold actuator is illustrated.

[0042] Referring now to figure 9, a view of the unified apparatus is illustrated.

[0043] In one implementation, the components involved in the tire vulcanization apparatus as shown in figure 2-9 is as follows:
1. Top chamber/top half of a steam box (15)
2. Bottom chamber/bottom half of a steam box (14)
3. a press base (13)
4. mold adjustable mechanism assembly (22)
5. top sidewall plate of the segment mold (21)
6. upper clamp ring (20)
7. lower clamp ring (LCR) hub (11)
8. lower clamp ring (19 and 10)
9. lower sidewall plate (18)
10. a lifting/mold plate (17)
11. segment guide arrangement (16)
12. ring assembly (1)
13. guide assembly (23)
14. a mold tube assembly (6)
15. vertically movable piston rod (12)
16. Top ring spacer (7)
17. inlet pipe (9)
18. outlet pipe (8)
19. piston rod actuator (4)
20. top ring cylinder mounting block (5)
21. hydraulic cylinder (2)
22. a bladder (27)
23. linear variable displacement transducer sensor (29)
24. self-aligning rod end coupler (3)
25. bead lift actuator cylinder (26)
26. top clamp ring lock nut (28)
27. Segmented mold (24)
28. Gland SMO lift ring (25)

[0044] In one implementation, the tire segment mold in the present invention as shown in figure 7, may be an inverted type tire segment mold and/or a two piece mold, mounted on a press base. The inverted type tire segment mold may include plurality of movable segment adapted to provide a tread pattern on a cured tire.

[0045] In one implementation, the tire curing press may include two halves of steam box namely top chamber/top half steam box (15) and bottom chamber/bottom half steam box (14).

[0046] In one implementation, the top half steam box (15) consists of mold adjustable mechanism assembly (22) to which top sidewall plate (21) of the segment tire mold is fixed by plurality of fasteners. The segment tire mold is an inverted (bottom) mount type segmented mold mounted on a press’s base (13).The bottom half steam box (14) holds the remaining components of the segment mold, upper clamp ring (20) affixed to top sidewall plate (21), lower clamp ring (19) threaded to lower clamp ring (LCR) hub (11) and other components of the present invented apparatus. The tire curing process may be initiated as the press base is closed by placing the top chamber (15) over the bottom chamber (14) by using mechanical linkage kinematics, as shown in figure 2.

[0047] In one implementation, a ring assembly (1) is concentrically mounted to bottom mount segment mold tube assembly (6). Guide assembly (23) is fixed to bottom half steam box (14) and remains stationary. The mold tube assembly (6) is concentric and guide by guide assembly (23). Guide assembly (23) is grooved to receive sealing arrangement so as the arrest the leakage of steam during the curing process.

[0048] In one implementation, the mold tube assembly (6) may act as the actuator for the segment mold expansion and/or retraction. It is actuated by two or plurality of hydraulic cylinder (2) which is mounted at the lower region of the press’s base through its trunnions and the rod end of the hydraulic cylinder is attached to the tube assembly (6) through self-aligning rod end coupler (3). The arrangement of plurality of hydraulic cylinders (2) is in the polar array with respect to the axis of the tube assembly (6).

[0049] In one implementation, bead lift actuator cylinder (26) along with rod and thereof lower clamp ring hub (11), top ring actuator spacer (7), top ring piston rod actuator (4) and Linear Variable Displacement Transducer sensor (29), is mounted with bottom mount segment mold tube assembly (6), which thereby forms the integrated bladder control system.

[0050] In one implementation, a lower clamp ring hub (11) may be attached with supply pipe (9) through which steam are supplied to the bladder and drain pipe (8) to drain out steam from bladder. The lower clamp ring hub (11) slides in the inner bore of tube assembly (6) through bead lift actuator cylinder (26) and rod. The mounting arrangement of bead lift actuator cylinder (26) to the tube assembly (6) is in such a way plurality of cylinders can be mounted at a specific angle to the segment mold actuator cylinder (2). The integrated bladder system contains bladder (27) with top clamp ring for bladder holding (20) mounted with top clamp ring lock nut (28) on one end and lower clamp ring for bladder holding (19) at other end. The center mechanism contains bladder control piston rod (12) supported by bearing tube for piston rod (7). The bladder control piston rod (12) inserted through lower clamp ring (10) mounted with lower clamp ring hub (11) and other end of bladder control piston rod (12) connected to actuating cylinder (4) through top ring cylinder mounting block (5). This arrangement is concentric to the tube assembly (6) and guide as its sliding at the bore located at the bottom of tube assembly (6).

[0051] In one implementation, the lower actuating ring (1) is affixed to a horizontal surface, and the lower sidewall plate (18) and the lifting plate (17) are also in fixed relationship to one another; the lower sidewall plate (18) and the lifting plate (17) can move axially in relation to the lower actuating ring, and means is provided for causing each segment of the plurality of lower movable segments to move radially in relationship to the lower sidewall plate (18) and the lifting plate (18).

[0052] In one implementation, initially the top half dome (15) and bottom half dome (14) are kept open as shown in figure 3. The segmented mold is in the lower portion of the tire curing press. Bottom mount type segmented tire mold mounted on press base, the lower portion includes a lifting plate (17), a lower sidewall plate (18), and having the plurality of lower movable segments circumferentially disposed therein and movably guided thereby.

[0053] In one implementation, a state where the lifting plate (17) having plurality of tread segments and top clamp ring (20) are in expanded and raised position respectively as shown in figure 4, providing a larger diameter and center bore clearance to position the green tire. After placing the green tire inside the segment mold as shown in figure 5, tread segments are retracted to adjoin with the next nearest tread segment and form the circumference of full tread pattern shape of the cured tire. Simultaneously, top clamp ring (20) and lower clamp ring (19) is brought to the specified height so as to match the inner wall shape of the cured and curing media is allowed to enter the bladder, thereof forming the near cured tire shape. Curing process starts as the press is closed when the top half steam box (15) in placed over the bottom half steam box (14) by the mechanical linkage kinematics of the tire curing press.

[0054] In one implementation, after the curing process is completed as shown in figure 6, top half steam box (15) is opened to allow removal of the cured tire out the segment mold. Each segment of the plurality of lower movable segments moves radially in relationship to the lower sidewall ring and the lifting plate by the segment mold actuator cylinder (2). Thereof, stripping the cured tire from the tread patterns. The lower clamp ring hub is actuated by the bead lift actuator cylinder (26) to stripe the cured tire from lower sidewall plate. The top clamp ring is operated by top ring actuator (4) to stretch the bladder. The movement of the top clamp ring removes bladder (27) from inner wall of the cured tire. Thereof, completely detaching the cured tire from the segment mold. The cured tire is unloaded from the tire curing press by either crane or vertical chuck loader.

[0055] In one implementation, the integrated mechanism as shown in figure 8 and 9, include a segment mold actuator having a hydraulic cylinder (2) and an actuating ring (1). The purpose of segment mold actuator is to expand and contract segments, through an actuating ring which will be mounted to the lifting plate of the segment mold. When hydraulic actuator's piston rod extends, the actuating ring forces the lifting plate axially which in turn, by the mechanism inside the segment mold, moves the segments in both axial as well as radial direction.

[0056] In one implementation, the integrated mechanism as shown in figure 8 and 9, include a center mechanism that holds and lifts a bladder assembly which is used for shaping and curing of tires. The center mechanism comprises the bladder assembly with the upper and lower ends of a bladder supported with upper and lower support members, a piston rod vertically moving into, and out of, engagement with the upper support members, and a lift cylinder vertically moving into, and out of, engagement with the lower support members. Center mechanism has singular or plurality of pathway to supply and drain curing media such as, but not limited to steam, hot water and nitrogen. The center mechanism of the apparatus is capable of supplying, circulating and draining of the cure media in the bladder used to cure the tires at prescribed pressure, temperature and duration as well as control the bladder according to the aspect ratio of the bladder for shaping, curing and vacuum. The movable segment provided on the tire segment mold may be adapted to move radially in alignment with said axial movement of said mold plate and a sidewall ring plate to provide a tread pattern on a cured tire.

[0057] In one implementation, the integrated mechanism as shown in figure 9, include bead lift assembly may include a hydraulic cylinder (2) to forcefully eject the cured tire from the lower half of tire’s mold and lifts the entire arrangement along with cured tire in such a way to unload the cured tire from the tire curing press. The apparatus utilize the hydraulic cylinder with interchangeability between water hydraulic and oil hydraulic systems and position sensing using the linear position sensing transducer sensor (29), sealing systems to arrest the leakage of steam for the steam boxes which are used in tire curing press. The linear position sensing transducer sensor (29) is provided to obtain accurate positional feedback and control the piston rod thus eliminating the need for spacers.

[0058] In one implementation, the apparatus for tire curing presses for curing off-road tires, industrial and agricultural equipment tires and further with modification on the arrangement and plurality of the actuating cylinders can be used in tire curing presses for curing passenger car, truck and bus tires and ultra-off-the-road tires. The apparatus may be suitable for curing both radial and bias tires in all categories of tires.

[0059] In one implementation, the present invention may be applicable with all combination of pressure, temperature and time period for curing said green tires. The preferable pressure may include a value less than 40 bar, preferable temperature may include a value less than 200°Celsius, and preferably time period may be 24 hours.

[0060] In one implementation, the cure media may be supplied in any sequential order of steam, hot water, cold water, nitrogen or any combination thereof, based on the curing schema required by the customer. This invention will be able to adapt to any combination of the cure media and curing duration.

[0061] Some of the important features of the present invention, considered to be noteworthy are mentioned below:
1. It has integrated three different, independent systems and components into a single apparatus:
a) Adaptation of concentric design of the systems for integration of the systems and components.
b) Positioning and orientation of cylinders used in systems.
c) Tandem position of top ring actuator with respect to the segment mold actuator and bead lift actuator
2. Integral assembly of segment mold actuator ring and lift cylinder and method of manufacturing.
3. Ease in mounting the segmented mold into the tire curing press.
4. Enhanced safety for the operator.
5. Avoids fatigue load on structural elements like top link, side plate and adjustable screw since segment mold is mounted on the base of the apparatus.
6. Avoids risk involved during mounting heavy molds on to the top link leading to human, machine and mold safety.
7. Reduction in setup and maintenance time.
8. Ease of segmented mold change due to segment mold mounted bottom.
9. Better human safety during mold change.
10. Energy efficiency is improved by moving heavy mass mounted bottom on the fixed base.

[0062] It may be understood by the person skilled in that art that, the coupling, joining, fitting, fastening, of the two components mentioned the present invention may be achieved by any of the existing coupling techniques that may include but not limited to nuts and screws and/or other mechanical linkage.

[0063] Although a unified apparatus for tire vulcanizing and a method thereof have been described in language specific to structural features, it is to be understood that the embodiments disclosed in the above section are not necessarily limited to the specific features or methods or devices described. Rather, the specific features are disclosed as examples of implementations of a tire vulcanizing apparatus.
,CLAIMS:1. An integrated mechanism for vulcanization of tire, said integrated mechanism comprising:
a segment mold actuator, comprises at least one hydraulic cylinder to actuate at least one mold tube assembly to expand and/or retract at least one tire segment mold;
a center mechanism, comprises:
at least one piston rod actuator, to actuate a variable movable piston rod to expand and/or retract at least one bladder, said bladder is adjusted by means of a top clamp ring at one end and a bottom clamp ring at other end;
at least one lower clamp ring hub, to clamp said bottom clamp ring of the said bladder;
at least one linear variable displacement transducer sensor to detect at least one positional feedback and/or control displacement of said vertically movable piston rod; and
at least one bead lift actuator cylinder, to eject a cured tire from said inverted type tire segment mold.

2. The integrated mechanism as claimed 1, is a unified apparatus combining a mechanism of said segment mold actuator for controlling said inverted type tire segment mold to receive at least one green tire for curing, a bladder control mechanism to expand and/or retract said bladder, and bead lift actuator cylinder to eject said cured tire.

3. The integrated mechanism as claimed in claim 1, wherein said mold tube assembly is mechanically coupled with said segment mold actuator using at least one rod end coupler.

4. The integrated mechanism as claimed in claim 1, wherein said bead lift assembly comprises at least one hydraulic cylinder to forcefully eject the cured tire from the lower half of said tire segment mold and lifts the entire arrangement along with cured tire to unload the cured tire from said tire curing press assembly.

5. The integrated mechanism as claimed in claim 1, wherein said hydraulic cylinder and said vertically movable piston rod is preferably a carbon steel seamless tube.

6. An apparatus for vulcanization of at least one tire, said apparatus comprising:
at least one tire segment mold having an operably expandable opening to receive said tire for curing;
a bladder assembly, comprises at least one bladder coupled to at least one mold tube assembly, said bladder is adjusted by at least one top clamp ring at one end and at least one bottom clamp ring at other end;
said mold tube assembly adapted to operate said tire segment mold and/or bladder assembly, wherein said mold tube assembly includes an integrated mechanism comprising:
at least one segment mold actuator, having at least one hydraulic cylinder to actuate said mold tube assembly to expand and/or retract said tire segment mold and thereby elevate at least one lifting/mold plate by actuating said ring assembly; and
a center mechanism comprises:
at least one piston rod actuator to actuate at least one vertically movable piston rod to expand and/or retract said top clamp ring and said bottom clamp ring;
at least one lower clamp ring hub, to clamp said bottom clamp ring;
at least one linear variable displacement transducer sensor to detect at least one positional feedback and/or control displacement of said vertically movable piston rod; and
at least one bead lift actuator cylinder to unload a cured tire.

7. The apparatus as claimed in claim 6, wherein said tire segment mold is an inverted type tire segment mold.

8. The apparatus as claimed in claim 6, wherein said mold tube assembly is mechanically coupled with said segment mold actuator using at least one rod end coupler.

9. The apparatus as claimed in claim 6, wherein said lower clamp ring hub is coupled with at least one inlet pipe for receiving at least one curing media, and an outlet pipe for draining said curing media.

10. The apparatus as claimed in claim 9, wherein said curing media is selected from at least one of a steam, hot water, nitrogen, or any combination thereof.

11. The apparatus as claimed in claim 10, comprises at least one guide assembly fixed to said mold tube assembly to arrest the leakage of said curing media by means of a sealing arrangement.

12. The apparatus as claimed in claim 6, wherein said bead lift assembly comprises at least one hydraulic cylinder to forcefully eject said cured tire from the lower half of said tire segment mold and lifts the entire arrangement along with cured tire to unload the cured tire from said tire curing press assembly.

13. A method for vulcanization of a tire using an apparatus, said method comprising:

expanding, by using a segment mold actuator coupled to a mold tube assembly of said apparatus, at least one tire segment mold having plurality of movable segments;
elevating, by using said segment mold actuator, a mold plate to provide an outer diameter clearance for placing at least one green tire or uncured tire;
extending, by using variable movable piston rod, at least one bladder to provide a center bore clearance for placing at least one green tire
loading, by using vertical chuck loader or crane, said green tire on said inverted type tire segment mold for curing;
actuating, by using a piston rod actuator, a vertically movable piston rod and thereby expanding, by using said piston rod, a bladder to receive and/or drain a curing media using at least one pipe;
placing, by using at least one mechanical linkage, a top chamber over a bottom chamber of said apparatus, for said curing;
supplying, by using said pipe, said curing media to said bladder for curing said green tire loaded;
curing, by using said curing media stored in bladder, a green tire to provide a final shape to a cured tire;
providing, by means of pressure from the inner side of the bladder by the said cure media, a tread pattern shape on a circumference of said cured tire; detaching, by using a variable movable piston rod, said bladder from the said cured tire;
Ejecting, by using said bead lift actuator, the said cured tire from the said mold;
unloading, by using vertical chuck loader or crane, said cure tire

14. The method as claimed in claim 13, wherein said segment mold actuator comprises at least one hydraulic cylinder to actuate said mold tube assembly to expand said inverted type tire segment mold, said hydraulic cylinder actuates a ring assembly to elevate said lifting/mold plate.

15. The method as claimed in claim 13, wherein said bladder is extended by means of at least one upper clamp ring and at least one bottom clamp ring.

16. The method as claimed in claim 13, wherein said pipe includes at least one inlet pipe for receiving said curing media, and an outlet pipe for draining said curing media.

Documents

Application Documents

# Name Date
1 Form- 2 with Provisinal Specification.pdf 2015-05-15
2 FORM 3.pdf 2015-05-15
3 Drawings as filed.pdf 2015-05-15
4 FORM 5 .pdf 2015-07-17
5 Form 2 with complete specification as filed.pdf 2015-07-17
6 Drawings as filed - complete.pdf 2015-07-17
7 2303-CHE-2015-Power of Attorney-121015.pdf 2016-03-15
8 2303-CHE-2015-Form 1-121015.pdf 2016-03-15
9 2303-CHE-2015-Correspondence-121015.pdf 2016-03-15
10 Form 18 [02-12-2016(online)].pdf 2016-12-02
11 2303-CHE-2015-FER.pdf 2019-12-12
12 2303-CHE-2015-FER_SER_REPLY [11-06-2020(online)].pdf 2020-06-11
13 2303-CHE-2015-CLAIMS [11-06-2020(online)].pdf 2020-06-11
14 2303-CHE-2015-US(14)-HearingNotice-(HearingDate-10-11-2022).pdf 2022-10-10
15 2303-CHE-2015-Correspondence to notify the Controller [08-11-2022(online)].pdf 2022-11-08
16 2303-CHE-2015-FORM-26 [09-11-2022(online)].pdf 2022-11-09
17 2303-CHE-2015-Written submissions and relevant documents [23-11-2022(online)].pdf 2022-11-23
18 2303-CHE-2015-PatentCertificate09-01-2023.pdf 2023-01-09
19 2303-CHE-2015-IntimationOfGrant09-01-2023.pdf 2023-01-09

Search Strategy

1 searchstrategy2303che2015_03-04-2019.pdf

ERegister / Renewals

3rd: 21 Mar 2023

From 06/05/2017 - To 06/05/2018

4th: 21 Mar 2023

From 06/05/2018 - To 06/05/2019

5th: 21 Mar 2023

From 06/05/2019 - To 06/05/2020

6th: 21 Mar 2023

From 06/05/2020 - To 06/05/2021

7th: 21 Mar 2023

From 06/05/2021 - To 06/05/2022

8th: 21 Mar 2023

From 06/05/2022 - To 06/05/2023

9th: 21 Mar 2023

From 06/05/2023 - To 06/05/2024

10th: 03 May 2024

From 06/05/2024 - To 06/05/2025

11th: 05 May 2025

From 06/05/2025 - To 06/05/2026