DE1778615C - Tire vulcanizing press with heating bellows - Google Patents

Description

The Hnindijr.ii be / I: sjch on a mature ulkar.isierprcsse /> jni vulcanize iirul. In particular, tires to be retreaded for 1 asikraUu mcii with a bladder. in a Rmiiraum / wisenen y \\ J \ ineinandeischiehbaren Z ". 'retractable by lsi under iJoppelialtung. vvone-i of ^aui! ere these two cylinders a WuKt g g

When vulcanizing heavy tires, such as tires for trucks or tractors, the introduction must and removing the green tire or the tire to be retreaded with a raw tread strip Tire comfortably be possible, since such tires have a considerable weight. It therefore, care must be taken to ensure that the loading height is low. Most of them are on tire vulcanizing presses loading devices available for larger tires. For them too it is desirable that they can be retracted at the lowest possible height above the lower mold half. For tire vulcanizing presses a small opening stroke is also desirable, once in order to reduce the overall construction to keep the press as low as possible and, on the other hand, to control the drive mechanism for lifting and lowering the upper part of the press as small and cheap as possible.

The invention is based on the object of providing a press of the type mentioned in the introduction to design the lowest possible overall height and the lowest possible opening stroke necessary, that the loading height is as low as possible. There should be a special drive for the bellows insertion be avoided.

This object is achieved according to the invention in that the bladder is arranged in the lower part of the press and the outer cylinder has a drive device and as an ejector for the fully vulcanized Tire is formed from the lower mold half and that the inner cylinder, with its lower edge bellows clamping rings are firmly connected to a locking device is assigned by which the inner cylinder can be locked in an upper position, in which this when lifting the outer Cylinder can be raised by the frictional force transmitted by the bladder.

In such a press, the outer cylinder that is necessary in presses for heavy tires is to the Tire can break out of the lower half of the mold, at the same time as a drive for bringing the Bellows made usable in the working position. The bladder is in the working position by the locking device still held when the outer cylinder is withdrawn, urr place the blank to be vulcanized in the lower mold half. In the tire according to the invention The vulcanizing press thus avoids a special bellows drive without increasing the overall height.

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(k-n. The OKium ^ hub needs! ediülich so »roLi / u then iii.ii i-.bi.Tcn Rc:! enwulsi criahi. ^ .enn -. ^ i

his UM der Rjifenrohlme n.-ch comfortable / tischen the Wul · te dc ^ Rohling- durJi the L u μ er ι mi: in one

(lic FormhaHlen can be introduced, whereby stacks have one another cc: '. inert. Oe ΐγ ΐ; ^' · ^{:! ΐ}

also the low height one to me! e \ enuieücii Be important, v. eil der ubeie Wuistsü / niig ..icr,, L:. "\ :. _r .n

i-eliiekunesMnneb.Hinu in Reehniiiii; / u is miles. 3 the Rciicnhohlramr. iimemleiu: ^

The arrangement of the "lieizbalge- _im " Pres-enumerlei! ! line the upper W uNl-, i! /:;: ■ .- \ erscii: cbcnuc an

{read it out. d; ~ hole fi; r \ len ZutUiü und AbHuB! rubbed--,., rri -.- im.nc :. ^ ⁱ : / w ^ --- a printer, ::; ^ / / ^l - «■■■

des Heizwas-.cr- at the "deepest part of the heatable- der. can Murker -.:;, aN l! i. du auUciui /. _ν ιΐ: · .-

iiii / ubringe-v This has the advantage that be: the F. nt- actuating drive-.> i ^ h; u: ιlI. Hierdur.;: He: ...; ..

l.vriing of the tire above the water level;.> man da! · die den "'.; _r. \\ uN> il / nng \ -.: - j: i.ene :: ..

- • ieheiuie steam the W, -mt; uiv den; Repent out- Antnehs \ orr; ciHu> u: den aul. '. Ereii /> inuier. r.tgej..ii

prints, which leads to very short recovery times. der Kraft <ier ir.: .. : .: c ·> i -ineien .A; i; r: cK \ ": ι nn ^ .n; ..

l. ") The locking device can be obtained from a mail

i: "; .- ii protruding, with the inner Z \! iiuler \ erbun- kau :! ^ o ai: ie: i: '.: c! i.'^; - ■: - ■ - n; i! dem Ίΐΐϋ «..: ... ^ - ...... ι

those rods that are made by means of -a cmc cross-; _; -, which Aiii:; ^ · ü .: J-η obceii A '.: Κ; -, ..'; : iig ¹ ^ ¹ '

l'-uhruni; of the rod durehürciicndeii Arreiicnmi: - Reiicnrühiini. ·. under Auirech: erhultn:; gt: e- ^ '· ^χ '"~'

IvlA'üCam P'Ls ^ nuntertei! fciMeübar is. 'rrnuab-u ^ ide: - in .i ^: e anure ["ormhallu \ c ^ emebei :.

In the case of an embodiment of the Lr- In the drawing: an embodiment of the invention, the Belgklemmrinae pressure-tight tight invention are shown schematically. It shows with the lower end of the inner cylinder 20 fig. fine vertical section through a bound. This construction of the bellows adhesive device opened the tire press, which caused too much pressure to the fact that the pressure of the heating water or canizing retreaded tires between Steam with which the bellows is retracted when the mold halves are completely closed,

This press is filled during heating, not Fig. 2 shows a state in which the tire of the

can affect an entire circular area, but 25 support of the loading device is lifted that only on an annular surface, the inside by Fig. 3 a state in which the press upper part

Terminal points of the bellows edges is limited. Which has driven down so far that the

Forces acting on the mold halves that have already touched the form impact rods and the outer

try to push the halves apart, because the cylinder was pressed down a little, with around 12 to 15% compared to such presses 30 Fig. 4 the state with already largely

reduced, in which the pressure is almost closed, with the bladder being the largest

can affect the bellows axis. Part is largely introduced into the tire and

Preferably, the outer cylinder is in one shown in FIG. 5 the state when it is completely closed Lifting a tire sufficient height using a press and pressurized bladder. The tire support of a loading device can be lifted. This lifting can be done by the outer cylinder lower part 1 and the press upper part 2 together with the Damages its additional functions, the bladder facilities located in them sta-k simplified to bring into the working position. shown.

To the loading device as close as possible. The lower part of the press 1 has a table 3 on which

to be able to move in over the lower mold half, 40 a lower mold half 4 with its heating plate 5 over

it is advantageous if an insulating intermediate layer 6 is placed on the upper edge of the inner one. At the

Cylinder and the fold of the bladder in the table 3 are downwardly protruding walls 7,

Position in which the inner cylinder and the heating element support a base 8 at the bottom. There are 8 on the floor

bellows at the deepest in the outer cylinder inserted pressure cylinder 9a and 9b for lifting and

are, are at the same level or lower than dtr am ', 5 lowering of the device described below

upper edge of the outer cylinder located un- provided.

tere bead seat ring. With such dimensions, the pressure fluid cylinders 9a and 9b are

When the a-outer cylinder is lowered, no part of the subordinate piston rods 10α, 10b (see Fig. 2)

the upper edge of the press lower part in front, so that the bottom 11 of an outer cylinder 12 is firmly

Loading device tied just above the lower 50. The cylinder 12 carries on its; a upper

Press part can retract. Edge a lower bead ring 13. Relative to the cylinder

According to a further development of the invention, an inner cylinder 14 is displaceable with linder 12,

the bottom of the outer cylinder at least one of these rest? indirectly via bellows clamping rings 16, 17

connected upwardly protruding stop rod, whose on a plate 15.

End face on the end face at least one wide 55 A bladder 18 has edge reinforcements 19 and 20. Ren, on the cover of an axially movable one, on its The edge reinforcement 19 is between a bellows lower edge the upper bead seat ring carrying the clamping ring 21 on the lower edge of the inner cylinder downwardly attached stopper 14 and the bellows clamping ring 16 clamped, rod hits, whereby the bead seat rings are held in one while the other edge reinforcement 20 between distance, which is preferably about 60 to the bellows clamping ring 16 and the lower bellows clamp smaller than the final distance of the bead seat - Ring 17 is clamped. The bellows clamping ring 21, the rings when the press is fully closed. In this way, the middle clamping ring 16, the lower clamping ring 17 can be easily achieved that the tire beads and the plate 15 are not inadmissibly approached by tensioners, not shown, so that screws are pressed tightly against each other. The bladder with a sufficiently large mouth width for insertion 65 18 is folded twice (fold 22) and is retained in the bladder in the tire cavity. a Rtngraum 23 extending between the inner-Nevertheless, du Wulstsitzringe so far surface of the outer cylinder 12 and the outer surface can be approximated that the upper Wulstsitzring also of the inner cylinder 14 is today. The area 23

5 6

is in relation to the dimensions of the Heizbai- cylinder 14 is as far as possible in the outer cylinder

ges 18 so that the latter disappeared into the annular space 23 linder 12.

must be forced and both very vigorously. Starting from this position, the pressures on the outer surface of the inner cylinder 14 as the central cylinder 9a, 9b are put under pressure, whereby the outer cylinder 12 is also raised to the inner surface of the outer cylinder 12 5, namely so presses on. far until the bead seat ring 13 has grasped the lower tire-other plate 15 is a downwardly extending rod bead 47 and the tire 46 has a small 24 attached centrally. This engages through a guide piece over the tire support 45 of the loading sleeve 25 in the base 8. The rod 24 has a device raised at the bottom (FIG. 2). The Beschik collar 26 and a little above it a Qucrboh- io kungsvorrichtung is now extended, which thereby tion 27. In the bottom 8 is only possible in cross-section that it is open on one side and placed there (Fig 2 to 5) locking bolt 28 gc - has a passage which is slightly larger than that which is supported in the transverse bore 27 of the rod 24 - outer diameter of the lower bead seat ring 13.
fits. During the upward movement of the outer cylinder, a line 15 12 is used to supply the heating medium, the inner cylinder 14 including the Hcizbalginncrc, which opens via the middle bellows clamping ring 16 in the 18 with upwards, namely by means of the Hcizbalginncrc. Friction that the Hcizbalg 18 transmits from the outer cylinder At the bottom 11 of the outer cylinder 12 are two 12 on the inner cylinder 14. Finally, stop rods 30a and 30b are provided, the rod 24, which is firmly connected to the plate 15 upper end faces 31α and 31b in yet to be described »o, pulled so far upwards until the bender manner as Attacks work. In the collar 26 on the underside of the bottom 8 to the system fully retracted position of the bladder 18, which has come into. At that moment the Arrc-F i g. 1, the upper edge 32 of the inspection bolt 28 (see FIG. 2) is automatically inserted into the inner cylinder 14 somewhat deeper than the upper edge of the transverse bore 27.

of the lower bead seat ring 13. »5 During the closing process, in which the upper press

The upper part of the press 2 has a fastening plate, part 2.

33. by means of a powerful, in the drawing not applied to the pressure cylinder 39 of the

shown lifting device for the purpose of the OfT upper bead seat ring 43 also relative to the press

NCNS and closing the press raised and lowered senobteil 2 moved down. The Press Officer

can be. At the bottom of the fastening part 2 can first go so far down until

Plate 33 is an upper mold part 34 with its heating plate, the end faces 3i α, 31 σ, 49 «, 49fr of the

35 beater rods 30a via a heat-insulating intermediate layer 36. 30b and 48a, 486 touch. the

attached. On the fastening plate 33 is a cylindrical bead seat rings 43 and 13 are then at a distance

drischcr. upwardly protruding approach 37 attached. from each other, which is slightly smaller than the final one

This is closed by a floor 38. 35 Distance that is assumed during vulcanization

At the bottom 38 there is a pressure medium cylinder 39. One achieves in such a way that even then the

strengthens, the effective cross section of which is greater than the upper bead 50 of the tire 46 is detected when

the sum of the effective cross-sections of the lower of these the lower tire bead 47 over the nominal dimension

Pressure medium cylinders 9a and 9b. With the piston out has approached.

rod 40 of the pressure cylinder 39 is the bottom 40. When the press is closed further, the

41 of a cylinder 42 firmly connected. The cylinder lower bead seat ring 13 and the upper bead seat ring

42 carries on its lower edge an upper bead 43 while maintaining their distances downward seat ring 43. This has a conical surface 44 which moves in, whereby the outer cylinder 12, on the way to be described as a guide of the lower Bead seat ring 13 is attached relative to the area for the bladder 18 when it penetrates 45 of the lower mold half 4 until the lower one serves the tire cavity. Bead seat ring 13 and the tire 46 on the lower

At the bottom 41 of the cylinder 42 , two after the mold half 4 have come to rest. While

Stop rods 48a and 48b protruding from below. The inner cylinder 14 remains connected to this closing movement

brought coaxially to the stop rods 30 a including the bellows clamping rings firmly connected to it and 30 b and their lower end faces 49 a 50 16. 17. 21 stationary relative 2um press frame, so that

and 49 b serve as stop surfaces. the Hetzbalg 18 finally with its fold 22

In Fig. 1 there is also a tire support 45 of a bearing which abuts the conical surface 44 and, in the process, as shown in FIG

Delivery device for a tire 46 is shown. Fi g. 3 can be seen, passed into the tire cavity SI

The moving mechanism for the tire pad45 is. When the bladder 18 is largely in motion, it is not shown. 55 fenhohlraum 51 is introduced (Fig. 4), something becomes

The function of the press is discussed below on pressure via the line 29 into the bladder 18 with one hand of all the figures, each being felt so that it is pressed against the inner wall 52 of the Figure shows another phase of movement. Tire 46 puts on.

F i g. 1 shows the state when the press is fully open. The fully closed position is in FIG. 5 in which the upper part of the press 2 can be seen as far as possible. F i g. 5 shows that by virtue of the arrangement borrowed is raised. The upper bead seat ring 43 of the bladder 18 in the lower part I of the press is drawn into the upper part 34 of the mold. Likewise, the opening 53 of the line 29 is at a deep point in which the lower bead seat ring 13 lies all the way down on the bladder 18. From Figure 5 it can be seen that the lower half of the mold 4 is used. A press that is too vul- nerable and completely closed between the tires 46 to be retreaded has been inserted with 65 end faces 31α, 316, 49α, 496 of the stop pieces of the tire support45 between the two mold holders 48a, 486 and 30a, 306. The heating bellows 18 is full space 54 has been created. This means that the bead "." Has disappeared in the annular space 23. The inner seat rings 13, 43 again slightly apart

have taken their final position to have.

At the end of the heating period, the press is opened by lifting the press button part 2, whereby the upper part of the mold 34 together with the upper WuIsI-sit. '. ing 43 detaches from the top of the tire 46. The bladder 18 initially remains in the tire 46. Now the outer cylinder 12 is raised by acting on the pressure medium cylinder 9 ″, 9 / j, whereby the Tire 46 is broken out of the lower mold half 4. From a consideration of Fig. 5 it is clear that with this lifting of the tire 46 of the llcizbalg 18 is pulled out of the tire cavity 51, since the Belgklemmringc 16, 17, 21 are still stationary are. At the same time, the bladder 18 is in the annular space 23 between the outer cylinder 12 and the inner cylinder 14 is retracted.

The outer cylinder 12 is raised until the inner cylinder and the bladder are complete have disappeared in the outer cylinder 12, so that their relative position is as in FIG. 1. In this Position, the tire 46 is already raised to a height that makes driving under the Rcifcnauflagc 45 of the loading device. After the tire 46 has been driven under by the loading device is, the Arretierungsbolzcn 28 is automatically pulled out and the pressure cylinder 9 «. 9 /> move the outer cylinder 12 together with the inner cylinder 14, which is passed through by the bellows 18 transmitted friction is carried along, down until the outer cylinder 12 finally reaches the in F i g. I has taken the position shown, after which the press can be reloaded, the proceeds as described above.

1 sheet of drawings

309 633/222

Claims (6)

Patent claims: 1. Maturing ulcanizing press for vulcanizing large preformed green tires, in particular retreading tires for Lasikrafiv..ig ·.: ·; with a llei / haig. which can be pulled into a ring rail between two nested cells under double folds. the outer of these two cylinders has a bead seat ring, dadure ii geke π η /. ei i_ h net. that the bellows (IXi in the press box (1) is arranged and the outer cylinder (12) a drive device; onv.ei ¹ ! The lower half of the mold (4) is formed and since the inner cylinder (14.1. with its lower edge bellows clamping rings (21.16, 17) is firmly connected to a locking device through which the inner cylinder (14 ) can be determined in ..let the upper position, into which it can be raised when the outer cylinder (12) is raised by the frictional force transmitted by the bladder (18). 2. tire vulcanizing press according to claim 1, characterized in that the locking device from a downwardly protruding rod connected to the inner cylinder (14) (24), which by means of a transverse bore (27) to the rod (24) reaching through locking bolt (28) can be determined on the lower part of the press. 3. Tire vulcanizing press according to claim 1 or 2. thereby gekenn / ichnet that the bellows clamping rings (21, 16, 17) pressure-tight with the lower end of the inner cylinder (14) are connected. 4. tire vulcanizing press according to one of claims 1 to 3, characterized in that the outer cylinder (12) to a height sufficient to lift a tire (46) above a tire support (45) a loading device can be raised. 5. tire vulcanizing press according to one of claims 1 to 4, characterized in that the Upper edge (32) of the inner cylinder (14) and the fold (22) of the bladder (18) in the position in which the inner cylinder (14) and the bladder (18) are deepest in the outer cylinder (12) are inserted at the same level or lower than that at the upper edge of the outer Cylinder (12) located lower bead seat ring (13). 6. Tire vulcanizing press according to one of claims 1 to 5, characterized in that at least one upwardly projecting stop rod (30a, 30b) is connected to the Bochn (11) of the outer cylinder (14), the end face (31a, 310) of which on the End face (49 λ, 49 b) of at least one further stop rod (48a, 48 b) attached to the cover (41) of an axially movable cylinder (42) which protrudes downward and which is attached to its lower edge and carries the upper bead seat ring (43), whereby the bead seat rings (13, 43) are kept at a distance which is preferably somewhat smaller than the final distance between the bead seat rings (13, 43) when the press is closed. ~ i. Rcücnv ulkaüisicrprcss:, - according to claim ί. thereby uekenn / eiehnet. that a drive device UMi 'that moves the upper-n V.'untsit / ring (43).:. \ ! .ir. '. ui: sv \ _w ' ise a pressure miuelzy linder (3 ^l >) · is stronger than the (Jen auüucn Zviuider (12) actuating drive «, orrichtuns.