KR20180022657A

KR20180022657A - Tire manufacturing drum

Info

Publication number: KR20180022657A
Application number: KR1020177034842A
Authority: KR
Inventors: 비스카르도 발도니; 플라비오 보스콜로
Original assignee: 마란고니 메카니카 에스.피.에이
Priority date: 2015-05-05
Filing date: 2016-05-05
Publication date: 2018-03-06
Also published as: WO2016178180A1; CN107872999A; EP3291977A1; EA201792432A1

Abstract

A drum manufacturing apparatus (1) comprising a drum (2) formed by two half-drums (7, 8), the half-drums being symmetrical with respect to a center plane (4) of the drum (2) And is connected to each shaft 5 (16) at a constant angle so as to rotate about the common axis (3). The device 1 is provided with a first actuator device 6 for rotating the drum 2 about the axis 3 and continuously changing the distance between the two half-type drums 7, 8, , A second actuator device 39 for moving the drum 2 in the radial direction between the structure of maximum radial expansion and the structure of maximum radial contraction is provided. The first actuator device 6 is disposed outside the drum 6 to move the half-type drums 7 and 8 in the axial direction through relative telescoping operation of the respective shafts 5 and 16 , And the second actuator device (39) is arranged to be mounted on the drum (2) so that the movement of the shafts (5, 6) of the two half-drums (7, 8) 6). &Lt; / RTI >

Description

Tire manufacturing drum

The present invention relates to a tire building drum.

More particularly, the present invention relates to a tire building drum comprising a manufacturing drum in a radially collapsible and extensible manner, also known as a positive drum.

In the known art, a production drum of the type described above is typically comprised of two half-drums, which are arranged on opposing sides of a centerline plane perpendicular to the axis of rotation of the drum Shaped and also in the half-drums, the segments are assembled as a whole such that the tire carcass extends radially from the radially expanded position defining a continuous outer surface of the drum on which the tire carcass is made, A plurality of segments each being movable between radially folded positions that can be removed are provided.

In order to be able to manufacture tires of different widths, the positive drums must also be axially adjustable. In this case, the drum comprises a group of central segments disposed between the groups of two half-drum segments and forming a boundary of the annular center band of the outer surface of the drum. In some drums, the axial adjustment of the drum is manually implemented by disassembling the central segments and replacing them with segments of different widths. Drums of this type are described, for example, in U.S. Pat. Nos. 5,320,701 and 3,817,812.

This solution is simple from a mechanical point of view, but it has drawbacks, which are mainly found in that the replacement of the central segments requires a relatively long time of machine stopping time, and also requires the storage space of a number of central segments of different width It is accompanied.

Numerous solutions exist to overcome these problems in the prior art, which generally maintain the center segments stationary in the axial direction and provide a continuous adjustment to the overall width of the drum, To move the two half-drums automatically and simultaneously, in the opposite direction, through the drum.

A solution of this type is, for example, described in European Patent EP 1 286 827.

While the more recent technical solutions may have made it possible to overcome a major portion of the drawbacks of traditional drums, existing drums that are radially moveable and axially adjustable in shape with an automatic system are usually constructed of drums It is only intended for the extraction process of the carcass, it is only possible to perform a limited axial relocation.

It is an object of the present invention to provide an improved tire manufacturing apparatus which not only allows continuous adjustment of the tire width during manufacture but also requires the need for a central spacer element The optical axis of the optical axis is removed.

According to the invention there is provided a tire building drum as defined in claim 1 and preferably as defined by any of the claims in a series of claims directly or indirectly dependent on claim 1, / RTI >

The invention will now be described with reference to the accompanying drawings illustrating some non-limiting embodiments.
Figure 1 shows a preferred embodiment of the device according to the invention in side and partial cross-sectional views when the drum is arranged in a fully extended configuration in the axial direction.
Figure 2 shows the device in Figure 1 in a differently operating configuration, i.e. with the drum arranged in a fully folded configuration in the axial direction.
Figures 3 and 4 illustrate a perspective view of the drum 1 (with parts removed for clarity) in a structure that is radially expanded and also radially contracted.
Figure 5 shows a side view of the drum of Figure 1 or 2;
Figures 6 and 7 show the drum of Figure 5 in a configuration that each operate differently.
Figure 8a shows the drum of Figure 1 in an enlarged accumulation with a radially expanded and axially extending structure (upper half of the drum) and a radially expanded and axially contracted structure (lower half of the drum).
FIG. 8B shows the drum of FIG. 1 in an enlarged accumulation with a radially contracted and axially extending structure (upper half of the drum) and a radially contracted and axially contracted structure (lower half of the drum).
9 is a cross-sectional view taken along section line IX-IX of the drum in Fig. 8A.
10 is a cross-sectional view taken along line XX of the drum in Fig. 8B.
11 is a cross-sectional view taken along line XI-XI of the drum in Fig. 9. Fig.
12 is a cross-sectional view taken along line XII-XII of Fig. 10;
Figure 13 shows the drum of Figure 12 arranged in a structure which extends radially to the left of the center plane of the drum in the upper part and the drum in Figure 12 in the upper same operating structure in the lower part Respectively.
Figure 14 shows a side view of the drum of Figure 2 with some components removed, particularly for some of the parts of the radially acting mechanism, for clarity.
Fig. 15 shows a side view of the drum of Fig. 1 with some components removed, particularly for the sake of clarity, with some parts of the electrically operated radial mechanism removed.
Fig. 16 shows details of Fig. 14 or 15. Fig.
Figures 17 and 18 show the details of the drum of Figure 12, each with a different operating structure.
Figures 19 and 20 schematically illustrate two of the operating procedures of the drum of the present invention.
Figures 21 and 22 illustrate variations of the apparatus of Figures 1 and 2, respectively, in a corresponding operating structure.

1, reference numeral 1 denotes a tire manufacturing apparatus (not shown) as a whole.

The device 1 comprises a drum 2 having a longitudinal axis 3 and a central plane or centerline 4 perpendicular to the longitudinal axis 3 and coaxial with the longitudinal axis 3, (5) which forms the rotation output member of the rotating shaft (6).

The drum 2 is constructed in a radially collapsible manner, that is to say that the drum is of a continuous cylindrical shape, in which, in use, the tire carcass 2a is manufactured, Between a radially expanded position having an outer surface of the drum carcass 2a and a radially collapsed position where the tire carcass 2a can be axially removed from the drum 2 (Figs. 19 and 20).

In addition to being radially movable, the drum 2 is configured to be axially adjustable in a continuous manner, thereby enabling it to take different widths and thus make it possible to produce various width tires.

The drum 2 comprises two half-drums 7 and 8 arranged in a symmetrical position with respect to the center plane 4 and coaxial with respect to the longitudinal axis 3 , Axially movable relative to each other along the longitudinal axis 3 away from or towards the center plane under the action of the actuator device 6.

Particularly, as shown in Fig. 1 and as further shown in Figs. 8a and 8b, the half-drum 7 is mounted on the central shaft 5 via a tubular body 9, Has an annular transverse wall (10) which is coaxial with respect to the longitudinal axis (3) and which is fixed at one axial end to the distal end of the central shaft (5) with a screw. At the opposite end in the axial direction, the tubular body 9 has a splined inner surface which is angularly coupled to the splined portion 11 of the center shaft 5.

Thus, the tubular body 9 is integral with the central shaft 5 in the axial direction and angularly.

The half-drum 8 then includes a tubular body 12 which is coaxial with the longitudinal axis 3 and which is connected to the inner surface of the tubular body 12 and the spline portion 11 of the center shaft 5. [ To the central shaft 5 in a manner which is axially slidably and also angularly fixed by means of a spline coupling 13 between them.

At the axial end facing the outside of the drum 2, the tubular body 12 has an annular flange 14 which has a tubular body 12 on an annular flange 15 integral with the sleeve 16, The sleeve being coaxial with respect to the longitudinal axis 3 and being coupled in an axially sliding manner to a portion of the central shaft 5 projecting out of the drum 2. [

The function of the actuator device 6 is to provide both a rotational movement about the longitudinal axis 3 and an axial adjustment movement of the half-drums 7, 8 along the longitudinal axis 3.

1 and 2, the actuator device 6 comprises a frame 17 which is supported by a bedplate (not shown) and which is also coaxial with the longitudinal axis 3 18 and two end walls 19, 20 across the longitudinal axis 3.

The end wall 19 faces the drum 2 and supports the sleeve 16 in such a manner as to be rotatable and axially sliding through the insertion of the bearing support 21.

A rotating operation is applied to the drum 2 by an actuator device 6 through a motor 23 which is connected to a bearing support 21 and consequently to a pulley (25) by a belt (24). In this way rotational movement is transmitted by the pulley 25 to the sleeve 16 and from the sleeve 16 to the center shaft 5 via splined coupling 13, The center shaft 5 and the sleeve 16 transfer rotary motion to the half-drum 7 and the half-drum 8, respectively.

The axial positions of the half-drums 7 and 8 along the longitudinal axis 3 constitute part of the actuator device 6 and extend along the longitudinal axis 3 to the central shaft 5 and the sleeve 16 And is controlled by an actuator device 26 designed to provide relative telescoping mode of operation.

1 and 2, the actuator device 26 is configured to simultaneously move the center shaft 5 and the sleeve 16 in opposite directions, whereby the half-drums 7, The position of the center plane 4 along the longitudinal axis 3 remains fixed during axial adjustment of the drum 2, while being moved away from or towards the drum 4.

For this purpose the actuator arrangement 26 comprises an annular plate 27 which is coaxial with the longitudinal axis 3 and which is traversed by the central shaft 5 and which is rotatable and axially fixed Is connected to the free end of the sleeve (16) by a bearing (28) coaxial with the longitudinal axis (3). The actuator device 26 also includes a further annular plate 29 which is coaxial with the longitudinal axis 3 and which is traversed by the central shaft 5 and which is coaxial with the longitudinal axis 3 And is rotatably and axially fixed to the center shaft 5 in a fixed manner.

The plates 27 and 29 are arranged on opposing sides of an annular intermediate wall 31 of a frame 17 which is parallel to the end walls 19 and 20 and which is traversed by the central shaft 5 in a rotatable manner And are arranged symmetrically.

The plate 27 has two through holes parallel to the longitudinal axis 3 and having respective axes 32 located on opposite sides of the longitudinal axis 3. Each of the holes is engaged by a respective lead nut 33, each of which is integral with the plate 27 and is engaged by a respective screw 34 coaxial to the respective axis 32 , Together with the associated lead nuts 33, form the corresponding lead nuts and screw coupling.

Likewise, the plate 29 has two through-holes, each of which is coaxial with the respective axis 32 and is engaged by a respective lead nut 35, each of which is integral with the plate 29, (34) to form a corresponding lead nut and screw coupling with associated lead nuts (35).

Each screw 34 is supported in such a manner that it is rotatable and axially fixed by end walls 19 and 20 and by an intermediate wall 31 which has two parts of the reverse thread reverse threading). Particularly, each part of the screw 34 located between the end wall 19 and the intermediate wall 31 is engaged with a respective lead nut 33 and a screw located between the end wall 20 and the intermediate wall 31, (34) engage respective lead nuts (35).

Close to the end wall 20, each screw 34 is configured to be connected to the motor 37 by a belt or chain drive 38, together with another pulley 36 mounted on another screw 34 Respectively. The screws 34, the pulleys 36, the motor 37 and the belt or chain drive 38 together with the plates 27, 29 with the lead nuts 33, 35, As shown in FIG.

According to a variant which is not shown, the actuator device 26 may comprise only one screw 34 and one pulley 37.

As shown in Fig. 1, in the configuration in which the drum 2 is extended in the maximum axial direction, that is, in the configuration of the maximum distance between the half type drums 7 and 8, the plates 27, Are disposed along the screws (34) close to the base (31). Starting from this structure, if the screws 34 are placed in a rotating state, the plates 27, 29 move symmetrically from each other and away from the intermediate wall 31. Since the sleeve 16 is integral with the plate 27 in the axial direction and the center shaft 5 is integral with the plate 29, 4 causes the half-type drums 7, 8 to move toward each other and to the center axis 5 and to the center shaft 5 in the sleeve 16, (4). Fig. 2 shows the structure of the maximum axial contraction of the drum 2, wherein the half-type drums 7 and 8 are close to each other.

3 and 4, the drum 2 has a maximum radial expansion structure (FIGS. 3 and 19) and a maximum radial contractive structure (FIG. 3 and FIG. 4 and 20).

For this purpose, the outer surfaces of the respective half-drum 7, 8 are radially divided into a plurality of respective segments, which are mounted on the drum 2 and also on the actuator device 6, 3 by means of an actuator device 39 which operates completely independently of the actuator device 26 which controls the axial position of the two half-drums 7, Lt; RTI ID = 0.0 > and / or < / RTI >

As shown in Figures 4 and 5, 6 and 7, in order to enable complete collapse and overlapping of the segments in the structure of maximum radial contraction, each half-drum 7, 8 comprise two pairs of segments, circumferentially narrower segments 40, arranged in alternating positions about the longitudinal axis 3, and a plurality of narrower segments 40 in which the drum 2 has a maximum radial contraction structure A circumferentially wider segment (not shown) that is subsequently placed in operative condition with the segments 40 when the drum 2 is folded, so as to partially overlap the segments 40 when the drum 2 is reached (Figures 4, 6 and 7) (41).

In particular, each narrow segment 40 of one of the half drum 7 or 8 is axially aligned with the corresponding segment 40 of the other half drum 8 or 7, And includes a main portion which is coaxial and has a fixed end bent at each axial end of the drum 2 toward the center of the drum 2.

Each wide segment 41 of one of the half-type drums 7 or 8 is axially aligned with a corresponding segment 40 of the other half-drum 8 or 7 and includes a main portion , This main part is accompanied by a connected end 42 which is coaxial with respect to the longitudinal axis 3 and which is also curved at each axial end of the drum 2 and which end 42, With the curved ends of the other segments 41 and the bent ends of the segments 40 of the same half-drum being movable relative to the respective annular sides of the drum 2, .

The center of the drum 2 is also formed by a plurality of central segments 43 each of which is arranged between and aligned with each pair of segments 40 or 41, Together with each pair of segments 40 or 41 described above, is capable of radially moving towards and away from the structure of the largest radial extension (FIG. 3).

In the particular embodiments shown in the accompanying drawings, each half-drum 7, 8 includes a set of six segments 40 for twelve segments and a set of six segments 41 Includes punishment. The total number of such segments may be different.

As shown in Figures 8A and 8B, each segment 40,41 is inserted between the segments 40,41 and the actuator device 39 to move the segments 40,41 radially. Is mounted on each half-drum (7 or 8) through a respective pantographic lever mechanism (44), which forms the boundary of a part of the drive device.

The said lever devices 44 of each half-drum 7, 8 are hinged to each other to vibrate about their respective axes 47 in a radial plane passing through the longitudinal axis 3 And each of the segments 40 or 41 is connected to the respective lever devices 44 of the half drum 7 or 8 by connecting means common to all the lever devices 44 of the half drum 7 or 8, Connect to tubular body (9 or 12).

Particularly with respect to the half drum 7, the connecting means comprises a collar 48 coaxial to the longitudinal axis 3 and rigidly connected to the free end in the axial direction of the tubular body 9, 3, coaxially mounted on the central portion of the tubular body 9 in an axially slidable manner and comprising two collar 49a, 49b which are physically separate from one another Are arranged in contact with each other in a structure of maximum radial expansion and maximum radial contraction (Figs. 14 and 15). The levers 46 of both lever mechanisms 44 of the half drum 7 are connected by a hinge to an axially fixed collar 48 and through a pin 60 to each segment Which is parallel to the hinge axis 47 of each lever device 44 and parallel to the longitudinal axis 3 and which is connected to the inner ridge 50 of the segment 40 or 41, Engages in a sliding manner transversely a slot (52) formed in the slot (40 or 41); The levers 45 connected to the segments 40 are hingedly connected to the ridge 50 of each segment 40 at one end and to the collar 49a at the other end, The levers 45 connected at one end to the raised portions 50 of the respective segments 41 and at the other end to the collars 49b by hinges.

The above-mentioned provisions for the half-drum 7 show that in this case an axially fixed collar 48 and axially sliding collar 49a and 49b are connected to the sleeve 16 And is effectively applied to the half-drum 8,

8 and 9, the actuator device 39 includes air motors carried by a plurality of motors 53a (Fig. 15), preferably a support ring 53, Is placed on the face 4 and is axially slidably connected to the spline portion 11 of the center shaft 5. [ The motors are distributed evenly about a longitudinal axis 3, each of which includes an output shaft that is parallel to the longitudinal axis 3 and rotatable about respective axes (see FIG. 9) that holds the pinions 54 , The pinion engages with a cogwheel 55 that rotates about each axis 56 parallel to the longitudinal axis 3.

The gear wheel 55 is mounted on a pipe 57 which is coaxial with the shaft 56 and which is integrated with a ring 53 having a spline formed therein. The toothed wheel 55 forms the boundary of two identical portions of the tube 57 each of which is connected to the splined end 58 of each drive screw 59 which is coaxial with the axis 56 In a sliding manner in the axial direction. Each drive screw 59 at the opposite end of the splined end 58 has an unthreaded shank which is part of the tubular drum 7 when the drive screw 59 is part of the half- On the annular flange 60 of the body 9 or on the flange 14 of the tubular body 12 when the drive screw 59 is part of the half drum 8, Which is rotatable and axially fixed via a guide plate.

Each drive screw 59 between the splined portion 58 and the support bushing includes a threaded portion 61 which is a lead nut integral with the collar 49a or 49b 62). The drive screw 59 is preferably a recirculating ball screw coupled to a female thread of a known type forming a lead nut 62.

The rotation of the drive screw 59 driven by the motor 53a through the rotation of the tube 57 is transmitted to the lead nut 62a along the shaft 56, Or 49b. Depending on the direction of rotation of the drive screw 59, the collar 49a or 49b may cause the levers 46 to move outward or inward of the drum 2, resulting in the expansion or closure of the pantograph lever device 44, Will move away from or toward the center plane 4, making it rotate with the radial movement of the segments facing away from it.

9), the actuator device 39 includes four motors 53a, two of which face each other in radial direction to form six segments 40 of the half-drum 7 ) And the six segments 40 of the half drum 8 and the other two are also diametrically opposed to each other so that the six segments 41 of the half drum 7 and the half drum 8 ) Of the six segments (41).

In this regard, it is also appropriate to specify that only two motors are sufficient for this purpose, one of which is used to operate the segments 40 of both half-drums 7 and 8, Is for operating the segments 41 of both half-type drums 7, 8. During the radial retraction operation of the drum 2, the operation of the motor (s) 53a is such that the motor (s) 53a connected to the two collars 49a through the drive screw (s) (S) 53a connected to the two collars 49b through the drive screw (s) 59 of the drive shaft (s) 59. In this way, the segments 40 driven by the axial movement of the collar 49a overlie the segments 41 in the radial movement towards the longitudinal axis 3, and the maximum radial contraction And avoids interference with the segments 41 partially overlapping the segments 40 in the structure of FIG.

11 and 12, the curved ends 42 of the segments 41 do not interfere with the curved ends of the segments 40 during movement from maximum radial expansion to maximum radial contraction So that the segments 41 start to overlap the segments 40 while moving towards the outside of the drum 2. In this way, it is possible to reduce the axial interference of the segments in the end regions, thereby achieving good radial matching of the segments and consequently achieving a smaller diameter for the drum 2 in the radially retracted position .

To this end each bent end 42 is connected to a respective lever mechanism 44 by a lever 63 extending between the bent end 42 of the problem and the hinge axis of the respective lever mechanism 44. [ Thereby pushing it outwards during the radial retracting movement of the drum 2, thereby shrinking it during the radial extension of the drum 2. [

12 and 13, the bent end 42 is connected to the main part of the segment 41 by means of respective pin means 64, which are parallel to the longitudinal axis 3 and which are connected to the segment 41 and the curved end 42 and under the action of the lever 63 to force the curved end 42 to be spaced apart from and away from the center plane 4 To move in the axial direction.

13, the bent end 42 is connected to the main part of the segment 41 by a respective hinge means 65 which, under the action of the lever 63, Forces the bent end to rotate about each axis traversing the longitudinal axis 3 so that it moves away from the longitudinal axis 3.

As shown in Figures 8 and 9, each center segment 43 is supported by a pair of segments 40 or 41 aligned axially therewith through two rods 66, Each slidingly engages a respective hole made in a rib 67 which is parallel to the longitudinal axis 3 and integral with the central segment 43. Each of the two rods 66 has one end also fixedly engaged in a hole formed in one of the two raised segments 50, and the other one of the two raised segments < RTI ID = 0.0 > 50 in a sliding manner. As a result, the two rods 66 of each center segment 43 are integral with one another, and the other of the two segments comprises the central segment 43 In the axial direction.

In addition to supporting and restraining the center segments 43 relative to the associated segments 40 or 41 aligned therewith, the pairs of the rods 66 interlocking with the central segments 43 A centering device 68 designed to ensure that the center segments 43 are always centered and held against the center plane 4 during axial movement of the half drum 7, .

To this end, a toothed portion 69 is provided in each of the two rods 66 connected to the central segment 43, as shown in Fig. 17, so that the toothed portion 69 of the other rods 66, So as to rotate about each axis orthogonal to the longitudinal axis 3 by engaging a synchronization wheel 70 which is mounted on the respective ribs 67 and rotatably mounted. When the two half-type drums 7 and 8 are moved away from the center plane 4 or axially moved toward it, the synchronizing wheel 70 rotates in a direction parallel to the axes of each pair of axially aligned segments (40 or 41) of one of the two half-drums is moved in the axial direction of the segment (40 or 41) of the other half-drum (8 or 7) Is symmetrical and consequently ensures that each of the central segments 43 is kept centered about the center plane 4 in a stationary state.

14, 15 and 16, the drum 2 is configured such that the center ring 53 is rotated about the axial distance of the tubular bodies 9 and 12 during axial adjustment of the drum 2 And an additional centering device 71 having the function of ensuring to maintain the central position.

The centering device 71 functions in a manner similar to the centering device 68 and extends between a collar 48 integral with the half drum 7 and a collar 48 integral with the half drum 8. [ (Not shown). In the example shown (FIG. 9), the drum 2 includes four pairs of rods 72, but the number may be larger or smaller.

The rods 72 in each pair of rods 72 are integral with a respective one of the two collar 48 and each include respective toothed portions 73 that engage synchronous wheels 74 Which is supported by the ring 53 and which keeps the center face 4 stationary for axial movement by one of the tubular bodies 9 or 12, Controls that there is correspondingly the same axial movement in the opposite direction by the tubular body (12 or 9).

The operation of the device 1 will now be clearly understood from the above description and will not require further explanation.

Figures 21 and 22 show variations of the device 1 shown in Figures 1 and 2. According to this modification, the adjustment of the axial direction of the drum 2 is performed by moving only one of the two half-type drums 7 and 8 in the axial direction and keeping the other one in the stopped state, The axial position of the center face 4 along the axial direction 3 is variable depending on the width of the drum 2 in the axial direction.

The apparatus 1 of Figures 21 and 22 is adapted to maintain the sleeve 16, and thus the half-drum 8 in a stopped state, during the axial adjustment operation of the drum, in this case the central shaft 5, Only the arrangement of the actuator device 26 configured to move only the half-drum 7 is essentially different from the device of Figs. 1 and 2 only.

Thus, with respect to the above example, the actuator device 26 includes only the plate 29 integral with the central shaft 5, while the plate 27 integral with the sleeve 16 does not exist, (16) is supported in such a manner that it is rotatable and axially fixed by a bearing support (21) mounted on the end wall (19) of the frame (17). The plate 29 is coupled to the screws 34, which in this case have only one threaded portion.

The structure of the drum 2 remains the same in all of the above examples. Further, in the case of a drum having a variable position center surface, the centering device 68 and the centering device 71 continue to perform their assigned functions, that is to say, following the axial movement of the half-drum 7, It should be noted that the center segment 43 is maintained centered relative to the center plane 4 and that the tubular bodies 9 and 12 are kept equidistant from the center plane 4.

17 and 18, axial movement of the collar 48 integral with the tubular body 9 causes axial movement of the rods 72 integral with the collar 48. Synchronous wheels 74 integral with the ring 53 are fixed to the ring 53 and therefore to the center face (not shown) because the rods 72 integral with the other collar 48 integral with the tubular body 12 are fixed. 4 to perform translational motion along the longitudinal axis 3 in the same direction by the distance of the translational motion of the tubular body 9 and against the half of the tubular body 9 resulting in the tubular bodies 9, So as to be held equidistant from the center plane 4. [

Similarly, the axial movement of the segments 40, 41 of the half drum 7 also causes axial movement of the respective rods 66, while the axial movement of the segments 40, 41 of the half drum 7, The rods 66 remain fixed in the axial direction. As a result, the synchronizing wheels 70 integral with the respective center segments 43 are engaged with the fixed rods 66 and the center segments 43 are engaged with the segments of the half- 41 to move in the axial direction in the same direction with respect to the center axis 4 and the center axis 4 with respect to the center plane 4, .

Claims

Claims 1. A tire making apparatus comprising a drum (2) having a shaft (3) and having two shafts (5, 16) coaxial with the shaft (3) and two half-drums Wherein each of the half-type drums is angularly connected to a respective shaft (5; 16) to rotate with the shaft (5; 16) about the shaft (3);
The half-type drums 7, 8 are symmetrical with respect to the central plane 4 of the drum 2 and relatively movable in the axial direction, each of which is a plurality of (40, 41) of segments;
The apparatus 1 is characterized in that the drum 2 is rotated about the axis 3 and the distance between the two half-drums 7, A first actuator device 6 for adjusting the width of the direction, and
And a second actuator device (39) for moving the segments (40, 41) in a radial direction so that the drum (2) has a structure of maximum radial expansion and a maximum radial contraction structure In the manufacturing apparatus,
Each half-drum 7 is fixed axially with the respective shaft 5, 16 and the first actuator device 6 comprises a relative telescoping arrangement of the respective shafts 5, Is arranged outside the drum (2) to move the half-drums (7, 8) in the axial direction through the action of the drum (2); And
The second actuator device 39 is arranged to be mounted on the drum 2 and the movement of the shafts 5, 16 of the two half-drums 7, 8 and the movement of the first actuator device 6 And the tire is configured to be operable independently of the tire.

2. A device according to claim 1, characterized in that the second actuator device (39) comprises a drive means (53a) and a mechanical transmission device (59,44), the mechanical transmission device comprising a drive means 41), and comprises pantograph means (44) for moving said segments (40, 41) in a radial direction with respect to said shaft (3).

3. The method of claim 2,
Each half-drum 7, 8 comprises respective first segments 41 and second segments 40 alternately arranged about the axis 3;
Said drive means (53a) comprises at least a first motor associated with said first segments (41) and at least a second motor associated with said second segments (40);
Wherein said first and second motors simultaneously operate said respective segments (40, 41) respectively and after said second segments (40) in the radial contraction operation of said drum (2) And move the segments (41).

4. The apparatus of claim 3, wherein the first and second motors are pneumatic, preferably compressed air motors.

The method according to claim 3 or 4,
The pantograph means 44 are connected to each of the first and second segments 41 and 40 at an angle to the respective shafts 5 and 16 and move radially with respect to the axis 3, And a pantograph (44) comprising two levers hinged to each other to define a pantograph
The pantographs 44 associated with the first and second segments 41 and 40 of the same half drum 7 and 8 are arranged in the corresponding first and second halves of the other half drum 8, Is symmetrical with respect to said center plane (4) with respect to pantographs (44) associated with two segments (41, 40).

6. The method of claim 5,
Each pantograph 44 includes two levers 45 and 46 whose respective levers are hingedly connected to the shafts 5 and 16 of the respective half- A radially outer end connected by a hinge to an inner end and a respective second segment (41, 40);
The inner radial end of the two radially inner ends in the same pantograph 44 is connected to the respective shaft 5 (16) in an axially fixed manner, Is connected to the respective shaft (5; 16) in a sliding manner in the axial direction and is connected to the drive means (53a) and is connected to the inner end of the first radial direction and from the shaft , And causes the deployment or non-deployment of each of the pantographs (44).

The method according to claim 6,
Each half-drum 7, 8 is coaxial with the shaft 3 and is axially fixed at a given angle to the respective shaft 5, 16, and each half-drum 7, Each tubular body (9; 12) supporting pantographs (44) associated with said segments (40, 41) of said tubular body (8);
Wherein each of the tubular bodies (9; 12) is axially fixed at an angle to the tubular body (9; 12) and all first radially inner ends of the respective pantographs (44) An annular connecting portion 48 connected to the tubular body 9 and connected to the tubular body 9 in an angularly fixed and axially sliding manner and coaxial with the shaft 3, And a second annular connection including annular collar (49a, 49b)
All the second radially outer ends of the pantographs 4 associated with the first segment 41 of each of the half drum 7 and 8 are hingedly connected to one of the two colors 49b And all the second radially inner ends of the pantographs 44 associated with the second segments 40 of the same half drum 7,8 are connected to the other of the two colors 49a Wherein the tire is connected by a hinge.

8. The method of claim 7,
The first motor is angularly connected to a first drive screw (59), which is parallel to the shaft (3) and has two shaft ends, each of which has a lead nut and screw coupling connected to one of the two collar (49a, 49b) of each half-drum (7; And
The second motor is angularly connected to a second drive screw (59) which is parallel to the shaft (3) and has two shaft ends, each of the shaft ends being connected to a respective half Is connected to the other of the two collars (49a, 49b) of the mold drum (7; 8).

9. The method according to any one of claims 3 to 8,
The drum 2 is coaxial with the shaft 3 and is positioned on the center plane 4 and fixed at an angle to the shafts 5 and 16 and is axially (53);
The device 1 comprises a first centering device 71 which allows the ring 53 to be centered and held on the center plane 4 during axial adjustment of the drum 2;
The centering device 71 includes a pair of rods 72 parallel to the shaft 3 and integrally formed with respective shafts 5 and 16, A synchronization toothed wheel 74 (not shown) rotates about a pin in the radial direction on the shaft 3 of the shaft 2 and engages two toothed portions 73 formed on the respective rods 72, ). &Lt; / RTI >

10. The method according to any one of claims 3 to 9,
The drum 2 includes third segments 43 each of which is centered relative to the center plane 4 and has two first segments 40 or second segments 41), and is configured to be movable radially with it;
The apparatus 1 comprises a second centering device 68 which allows each third segment 53 of the drum 2 to be centered on the center plane 4 during axial adjustment of the drum 2 ;
Wherein the second centering device (68) includes, for each third segment (43), a pair of rods (66) each of which is parallel to and parallel to the axis (3) 41 of the first or second segments 40, 41 of the first and second segments 40, 41 and the second centering device 68 is integral with each of the third segments 40, 43 which are rotatable about the pin in the radial direction on the shaft 3 of the drum 2 and which are rotatably supported by two toothed portions 69 formed on the respective rods 66, And a synchronous toothed wheel (70) adapted to be rotated.

10. The method according to any one of claims 5 to 9,
Each first segment 41 includes an end portion 42 that is bent toward a major portion and an axis 3 of the drum 2 and forms a portion of a corresponding side of the drum 2;
Each end portion 42 is axially slidably connected to each of said major portions and connected to a pantograph 44 of each of said first segments 41 so that said pantograph 44 extends from a deployed position Is moved from the retracted position in the axial direction to the extracted position in the axial direction under the action of the pantograph (44) when moving to the closed position.

10. The method according to any one of claims 5 to 9,
Each first segment 41 includes an end portion 42 that is bent toward a major portion and an axis 3 of the drum 2 and forms a portion of a corresponding side of the drum 2;
Each end portion 42 is hingedly connected to the respective major portion and connected to the pantograph 44 of each first segment 41 to form a closed position from the deployed position of the pantograph 44 Wherein the pantograph is configured to move from a lowered position that is continuous with each of the main portions to a raised position toward the outside of the drum (2) under the action of the pantograph (44).