DE2048746A1 - Method and apparatus for removing vulcanized tires from a tire molding press - Google Patents

Description

47 424

KOEB STEEL, ltd., 86-1, 1-Chome, Wakinobama-oho, Fukiai-ku, KOBE, (Japan)

Method and apparatus for removing vulcanized tires from a tire molding press

The invention relates to a method and a device for the smooth, smooth, smooth and smooth cutting of pneumatic tires which have been molded and vulcanized on a tire molding press between two mold halves or mold parts.

In a known tire molding press for [molding and vulcanizing pneumatic tires, the tires molded and vulcanized between an upper and a lower mold half of the press are removed in such a way that the underlying circular vulcanization of the tire, which rests on a bead ring connected to the lower mold half, is removed with the aid of a force exerted by a cylinder of a separate device is moved close to the top in order to forcibly detach and remove the finished tire from the lower normal half. This kind

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the removal of the finished tires is, however, with the great difficulty associated with the finished tire when Bioh opens the mold or the upper half of the mold aioh near the top of the lower half of the iOrm, is often not released from the upper mold half, but rather despite a previously baked solvent is raised with the upper mold half. This is because no precautions have been taken are forcibly lifted off the finished tire from the sioh to solve the upper half of the mold, so that the unexpected Upward movement of the finished tire only duroh Adhesion to the bladder is prevented, which is located inside the tire and to the lower half of the mold is appropriate *

The »· solicitation you have through a patent in the USA 3 260 782 device disclosed for overcoming a variety of sector segment plates has, welobe to a larger Durohmesser than the of the circular tire beads can be extended ν and between the upper and lower bulges of the tires and are located within the blaee of the bellows. Therefore, the upper bead of the tire is forced from the sioh lifting upper mold half solved with the help of the extended sector segment plates, which the Hold the lower tire bead if the tire sticks in the upper half of the iOrm. The lower tire bead is released from the lower mold half by means of a force that depends on the relative stroke movement of the Sector segment plates is derived, so that the upper tire bead sohließlioh on the extended sector * Segment plates rests and the tire accordingly

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detached from "bo-idon mold halves and physically exposed. This crowned device has jkIocIi the Ilaehteil, that dar = rubber or other elastic material The inner width of the bladder is worn away, causing the detachment drr finished vulcanized tires adversely affected and the .Ablösung made unsafe because the Segment pints are arranged within the bladder. to Another disadvantage is the tendency of the hateria3.es ■ of the segment plates to premature wear, v / eil the .segment plates you used for vulcanizing Fluids are exposed, so that the life of the device is reduced overall, whereby the maintenance and supervision of the liners become very cumbersome and expensive.

The object of the invention is to create the possibility of fully vulcanized tires from the upper and lower halves of the shape of a collapsible bladder or bellows provided tire molding press for molding and vulcanizing to be able to detach them from tires as gently and safely as possible while avoiding the above-mentioned night delusions.

To solve this problem, according to the invention, a method for removing or detaching vulcanized tires is provided of the upper and lower parts or the upper and lower halves of the mold of a tire molding press for shaping and vulcanizing p ^ umatic Proposed tire according to which initially a gap between the upper bead of the vulcanized

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Iieii'ens and the upper bulge of the bladder produced or a gap is made at this point, whereupon an arch is made up of a large number of sector segment plates which have a larger diameter than the Tire bead have been expanded, is introduced into this gap or distance, after which the Segment plates moved upwards together with the upper clamping device for the upper bead of the bladder, and Although two-way in a fixed relationship or together with the upward movement of the upper mold half, around the finished vulcanized tire lift off upwards, with the tire in the area of the overlying bead from the Segment plates is carried and / or held.

Furthermore, according to the invention, a device for carrying out the method according to the invention is proposed, which has a centering mechanism arranged centrally in the tire molding press, which with Segment plates are coupled to a larger diameter than the bead diameter of the finished product Tires can be extended and at the ob ^ ggn. Clamping device for the upper bead of the bladder / bellows of the tire molding press are arranged.

The invention makes it possible to produce vulcanized tires from the molded parts of a tire molding press without damage the finished tires or components of the press itself can be removed reliably and easily, which means The service life of the press is increased and the maintenance and overhaul of the Preese -simplified.

Further objects, features and advantages of the invention

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result from the following description and the claims:

The drawing shows an embodiment of a tire molding press designed and operating according to the invention shown schematically, namely shows

Fig. 1 is a vertical section through the v / es entlichen Parts of the Heifenformpresse, whereby the Molded parts are in the position required for molding and vulcanizing the tires,

Fig. 2 is a partial section, similar to Fig. 1, with the upper part of the Forin has come loose and the Segment plates are extended,

3 shows a section similar to that in FIGS. 1 and 2, wherein the centering mechanism has released the finished tire from both molded parts,

Figure 4 is a top plan view of the retracted or contracted ones Segment plates,

Fig. 5 is a plan view as in Fig. 4, but with the Segment plates extended to their outermost position have been,

6 shows a vertical partial section through the upper end of the centering mechanism according to a modified one Embodiment of the invention with retracted segment plates and

FIG. 7 shows a section as in FIG. 6 with extended segment plates.

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liei of the tire molding press shown in FIG the centering mechanism according to the invention from one vertically arranged working or pressure cylinder 1, which contains an awelbeiligon Kolbon, the obero Piston half 2 slidably seated in cylinder I and carries a Vorbindungsatango 3, while the separately attached lower piston halves 4 is also slidably housed in cylinder 1 and a piston rod has, which cooperates wit segment plates 16 and the same adjusted.

Both piston halves 2 and 4 can be operated independently of one another Move vertically in cylinder 1, either upwards or downwards, with these movements caused by hydraulic pressure medium, which is optionally through openings 23, 23 and 24 is introduced into the printing cylinder 1.

The pressure cylinder I has a permanently attached cylinder cover 6, to which a lower clamping ring 7 is attached, v / which the underlying annular iCleinbulst of a collapsible bladder -J or a corresponding bellows down against a concentrically arranged lower bead ring B, which is attached to the lower mold half 11 is attached, presses. The upper annular bead of the bladder 9 is clamped or clamped by an upper clamping device, which consists of an annular plate 12 and a clamping ring 13, both of which are connected to the upper end of the connecting rod 3 <ier upper piston half 2. The Segmentpiatton 16 are radially displaceable on the top of the upper

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Small-sized matter 15 and in particular outside b of the bladder 9 arranged.

Like Pig in particular. 4 and 5 soaps, a plurality of sector-shaped segment plates 16 are provided, each individual segment plate 16 being at least partially aul of the upper clamping ring; 1> rests and is covered by an iJr ltplate 17. Each segment plate 16 can be displaced radially outwards or inwards by a certain distance. The upper end of each toggle lever £ 0, which serves as a drive and which is mounted on the upper iting plate 12 so as to be pivotable about a style 20 ′, engages the underside of each individual segment plate 16. The lower unde of each toggle lever 20 engages in a hat 19 of a sleeve 19 ¹ , which is mounted on the upper end of the piston rod 5 of the lower piston half 4, all of these parts being located in a recess 12 ′ in the ring plate 12 . The piston rod f> controls the movements of the lower kolbe21h; 111.te ν the movement 70η of the individual segment plates 16 in such a way that all the se, ment plates 16 are displaced inwards or outwards at the same time.

The holding plate arranged above the segment plates 16 is stranded with screw bolts 26 which extend through slots 'ti'j in the individual segment plates 16 and are fastened in the clamping ring 13. The upper bead ring 14 is attached to the upper half 15 of the porin and interacts with the ring 13 in such a way that it can come into contact with it, as FIG. 1 shows. The vertical! "Evegungen the upper Wulstrin ^ it weruen ΛA by a nir]] t shown usual

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Controlled press mechanism. Porm halves 15 and 11 are moved relative to each other during the operation of the tire molding press in order to shape and vulcanize the tire, so that the upper bead 18 and the lower bead 21 of the tire 10 from the upper bead ring 14 or the lower bead ring 8 of the bladder 9 and the mold halves 15 and 11, respectively. A feed pipe 27 is provided to flow fluid used for vulcanization into the bladder 9 through the cylinder cover 6 and the lower clamping ring 7 to initiate.

The molding and vulcanization of tires and the stripping of the vulcanized tires according to the present invention is explained below in connection with various drawings.

By introducing fluid used for vulcanization into the bladder 9 through the supply tube and the lower half 11 when the mold is closed or when the mold halves 15 and 11 are in contact with one another, the tire 10 is shaped and vulcanized in such a way that it has the of the bladder 9 and the mold halves 15 and 11 assumes a certain shape under the influence of heat and pressure. While the molding and vulcanization of tires are both piston halves 2 and 4 in that shown in FIG Position, while the segment plates 16 are retracted radially inward relative to the upper bead ring 14 are and the upper mold half 15 held immovably will. Both the upper and lower annular bulges of the bladder 9 are between the upper ring plate 12 and the clamping ring 13 or the clamping ring 7 and dom

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lower J ills tr ing ϋ in the illustrated Veise a ^ eb held.

!, aohdetij der Ueixen was formedimd vulcanized, the upper piston filler 2 is moved downwards, whereby the connecting rod 3 is moved downwards at the same time, which leads to a lowering of the segmental battens 1G connected to the connecting rod 3 via the ICIqmuring 13 and the ring plate 12 . Once the öii'net iorni, 10 vrlrd the piston rod 5 with respect to the rod Ä'bindnngs "5 after moving above the upper vuist lu the Ue util but still at the upper bead ring 14 abuts the upper i'ormhtili'te 15, while The sleeve 19 'fixedly arranged on it is also moved upwards with the piston rod 5. As a result, the toggle levers 20 are pivoted with respect to the upper King plate 12, so that all segment plates 16 are simultaneously moved from the position shown in Figure 4 to The position shown in Pig. 5 can be shifted, with a part of these segment plates being pushed under the upper bead 18 of the tire 10, as Pig. 2 shows.

Ansolil Leßend gets the connection anxiety 3 into the one in Pig. 3 would be moved upwards, so that the .Blase 9 aligns itself in the illustrated V / eise and thereby the vulcanized tire 10 is detached from the lower porcelain 11 half. When progressive raising the bladder 9 is more and more removed from the tire 10, iiachdem fled bladder 9 voll3tänö ⁵ has geriohtet or was pulled in the length, · dgt the tire 10 practically only on the extended fjegmentplatten 16. As soon as the tire from below

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means of a suitable Iiubartües or another, not illustrated, apparatus is onouiwon to _0, '"' ground all Segmentpiatten 16 Retired: vm by the piston rod unabhLingig lowered from the Vurbindungantaage 3 5, whereby the sleeve 19 'moves down times the toggle lever 20 suriloksohwenkt. The tire 10 can then be removed from the centering mechanism with a relatively small amount of force, namely only by the force needed to lift the tire loosely on the lifting arm.

When the tube 10 is glued to the upper IOrMh ". !! te 15 remains and thus when opening the iresse from the upper one Pormhlilfte 15 should be moved upwards, so will he of the Segaentplatten 16 compulsorily from the upper Mold half 15 solved because the Segmentplat th 16 in this Trap hold back the lower bead 21 of the tire 10.

From the explanation of the above exemplary embodiment it can be seen that the extension and retraction of the segment plates 16 can also be effected with other elements, for example with the conical nooks 22 shown in FIGS Replace 20. Γ> βχω in i'ig, 6 and '( illustrated embodiment example, the segment plates 16 are retracted or extended by vertical movements of the conical cam 22, which is attached to the piston rod 5 by means of a fastening nut 22 ". It should also be noted that the Conical nooks 22 can be mounted either with the larger diameter downwards, as shown in the drawing, or vice versa, with only the control movements of the piston rod 5 depending on the respective mounting type *

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need to be set up.

As can be seen from the above description, the forced detachment of the vulcanized tires 10 is effected by extending a large number of Segwent plates 16 to a larger diameter than that of the Vulste of the Ke if ens 10 "without the scuffing on one of the" two Pormhüliten 11? or 11 can stay. It should be noted that the detachment of the scolding by means of extendable segment plates 16 gerarß the invention very gently, forcibly and B can be carried out ohne11 because the segment plates 16 and the drive for the same outside and above the bladder 9 are arranged so that the risk an irregular or faulty operation of the segment plates and / or the drive for the same due to wear of the material of the bladder, which occurs when the segment plates are arranged within the bladder, is eliminated.

Claims;

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Claims (1)

2 G A.? 7 A S A 24 Claims Method of removing a vulcanized tire a tire molding press having upper and lower mold parts and a collapsible bladder for molding and vulcanizing pneumatic tires having upper and lower veins thereby G e k e η η ζ e i c h net that the upper V / ulst (18) of the vulcanized tire (10) and the upper V / ulst of the bladder (9) are initially listed from each other and then a large number of segment plates in the space created between these two beads (16) are partially pushed in and then moved upwards, the segment plates pn dom upper V / ulst dos vulcanized tire comes to rest. ί.) Method according to claim 1, characterized in that that the segment plates (16) are extended so far v / ground that their outer edges lie on a circle with a diameter larger than the inner diameter of the upper bead (18) of the vulcanized tire (10) 1st. 3.) Veriahron according to claim 1 or Ti, characterized in that the segment plates (16) together with (l (? R Yl eimnvörrichtung for the upper bead of the · hl ; ■ '? ([)) Have been moved upwards. 4.) ancestors according to claim 3 »characterized in that dnß the oogment plates (16) at the Aufwärtssbeve / pmg d (- £ j upper molding.es [Vj) the Rcifenformprcor.o linch 109816 / 1J595. BATH ORIGINAL ? C Λ 'V 4 B χ, - ft above moved v / earth. 5.) Reiicmxormpresso for foaming and vulcanizing tires with upper and lower molded parts Lon and a collapsible bladder, which like the tires each has an upper and a lower JuIsbring, for performing the method according to one of claims 1 to 4, characterized in that it has a centering mechanism for removing the vulcanized tires (10) from the moldings (15,11), which centering mechanism comprises a plurality of segment plates (16) which are attached to the clamping device (12,13 ) are arranged for the upper bead of the bladder, whereby these;> :: gment plates (16) can optionally be extended or retracted with the help of squats (20,22) so that the outer edges of the individual segment plates are in a circle with a larger diameter than the beads (18, 21) of the vulcanized tire can be displaced, the segment plates (16) on one of the beads of the vulcanized tire (10) by relative movement in relation to this tire come to the plant. 6.) Device according to claim 5, characterized in that the crouches are pivotable levers (20) which implement axial movements of a piston rod (5) Ln radial movements of the segment plates (16). 7.) Device according to claim 5, characterized in that the squat is a conical body (22) int, the 109816/1595 - 3 - It am .iiido oilier axial with / ügbaren piston rod (: /) sibzt and the axial movements of the piston rod implemented in radiaie Bov / egungon of the segment plates (16). 1 0 9 8 1 6/1 b 9 5 BAO ORfQfNAL