CN203141856U - Tire molding equipment - Google Patents
Tire molding equipment Download PDFInfo
- Publication number
- CN203141856U CN203141856U CN 201220595197 CN201220595197U CN203141856U CN 203141856 U CN203141856 U CN 203141856U CN 201220595197 CN201220595197 CN 201220595197 CN 201220595197 U CN201220595197 U CN 201220595197U CN 203141856 U CN203141856 U CN 203141856U
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- Prior art keywords
- axle
- disk
- tire
- dimple
- pressure roll
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Abstract
The utility model provides a tire molding equipment, wherein the pressure roller has a non-rotatable shaft and a plurality of radial disks with the same shape arranged on the shaft, wherein each disk includes an inner portion and a outer portion, and the inner portion has recess to accommodate shafts, wherein the length of recess is larger than the corresponding size of shaft in one direction, allowing the disk to translationally rotate relative to shafts and another disk to move a distance in the one direction as a tire layer under the disk and the irregular body channel associated with the tire layer.
Description
Technical field
The utility model relates to a kind of tire building equipment.
Background technology
Tire building equipment comprises assembly drum and the pressure roll of being made up of a plurality of disks, and described assembly drum has the tire layer that arranges around its circumferential surface.Each disk has 100 or 120 millimeters diameter, and the range distance that disk can be individually moves through by piston respectively is less than 10 or 20 millimeters, thereby pressure is applied to the tire layer that is positioned on the cylinder.The known pressure roller is enough when pressure is applied on the tire layer with constant thickness substantially.Yet sometimes, tire layer has different thickness, and it surpasses the stroke distances of disk, and perhaps tire layer utilizes other instrument to be connected to the moulding drum, magnetic clamping bar for example, and it causes thickness to surpass the stroke distances of disk with tire layer.
Because this purpose, known tire building equipment have the fixture of the pressure roll that keeps all, and it can surpass the disk bottom away from assembly drum with the thick part that allows tire layer or magnetic clamping bar by the movement pressure roller.In the process of like this motion, the pressure that is applied to tire layer by pressure roll reduces, changeable even be interrupted.
The utility model content
The purpose of this utility model provides a kind of tire building equipment with pressure roll, and wherein the continuity of the pressure of pressure roll on tire layer and/or uniformity obtain increasing.
The utility model provides a kind of tire building equipment that comprises assembly drum and pressure roll, wherein assembly drum is set to admit tire layer around its circumferential surface, wherein pressure roll is movable in the position, in this position, pressure roll abuts against the tire layer on the assembly drum and cooperates with the circumferential surface of assembly drum, so that pressure is applied to tire layer, wherein pressure roll is provided with at the longitudinal extension of pressure roll, non-rotary axle and a plurality of vertically directly being arranged on the described axle at axle close to each otherly, the radially disk of shape unanimity, wherein each disk comprises the interior section that non-rotatably is supported on the axle and rotatably is supported on exterior section on the interior section, wherein interior section has the dimple that holds axle, wherein dimple is in size that a direction the has size greater than the correspondence of axle in a described direction, wherein the size of dimple allows disk with respect to the axle translation in a described direction, and allow another disk to move the LAP distance in a described direction, the trip distance as tire layer and the irregular body related with described tire layer under disk passage, wherein irregular body comprises cramping body, is used for keeping tire layer against the circumferential surface of assembly drum or keeps cushion, varied in thickness in the assembly of cap strip and/or tread ply.
Therefore, the utility model provides a kind of novelty and useful tire building equipment, wherein the range of disk increase is apart from allowing above-mentioned disk to apply pressure to tire layer continuously and constantly, even have irregular body at tire layer, for example on tread ply or cramping body.
In one embodiment, dimple limits the range distance in size and the difference of axle between the size on the described direction of a described direction, and it is 25 millimeters at least, and preferably at least 27 millimeters, most preferably at least 30 millimeters.In one embodiment, range in described direction distance is at least 33% of the size of dimple on a described direction, and preferably at least 36%, most preferably at least 40%.The known pressure roller is used for and cramping body, cushion and tread ply combination, because Guan Lian irregular body has surpassed the range distance of known disk usually with it.By described range distance is increased to above-mentioned prolongation degree, for example the obstruction of the varied in thickness of cramping body and cushion and tread ply can be handled under the situation of the axle that does not need to rise pressure roll.
In one embodiment, cramping body is the magnetic clamping bar, has the thickness of 5-10 millimeter scope.The enough passages as the described thickness under pressure roll of range distance.
In one embodiment, the part of stroke distances is as the passage of the clamping bar of disk bottom, and wherein remaining stroke distances authorized pressure is applied to tire layer.Applied pressure can guarantee that layer is stable bonding.
In one embodiment, the assembly of cushion and tread ply has a profile, in cross section, this profile has along the thickness of the change width of assembly, wherein, preferably, maximum disparity in the thickness of profile is at least 10 millimeters, and wherein stroke distances is such, makes in a plurality of disks one can place with the thinnest part of profile and engages, and simultaneously, another of a plurality of disks engages with the thickest part of profile.In such a way, pressure can constantly apply through whole profile.
In one embodiment, applying pressure to by pressure roll in the process of tire layer, axle is in fixing position with respect to assembly drum.Because the stroke distances that increases, the bottom that the assembly of cushion and tread ply or cramping body can the overpressure rollers need not risen the axle of pressure roll with respect to assembly drum.Like this, axle can be fixed with respect to the position of assembly drum, and in this case, axle can provide stabilised platform, and disk can apply pressure stable to tire layer thus.
In one embodiment, pressure roll is equipped with the piston for each disk, it is coupled to axle with corresponding disk, and wherein each piston is set to control individually corresponding disk with respect to axle and translation relative to each other, and wherein piston has the stroke suitable with the stroke distances of disk.Piston can move disk along whole stroke distances of disk, thereby control is applied to the pressure of tire layer by disk.
In one embodiment, piston can move between extended position and punctured position, and wherein, at punctured position, piston is retracted in the axle fully.This allows to utilize piston axle to be inserted in the dimple after disk is in place.
In specification, describe with present different aspect and feature can under possible situation, apply respectively.These independent aspects, particularly in subsidiary dependent claims, describe aspect and feature can be used as the theme of dividing an application.
Description of drawings
Next will explain the utility model according to the exemplary embodiment that in schematic accompanying drawing, shows, among the figure:
Fig. 1 shown according to the utility model first embodiment, have for the tire assembly drum of admitting tire layer and be used for pressure is applied to the side view of the tire building equipment of the pressure roll that is positioned at the tire layer on the tire assembly drum.
Fig. 2 A shows is front view according to the pressure roll of Fig. 1;
What Fig. 2 B showed is the cross section of the pressure roll of the line II B-II B of basis in Fig. 2 A;
Fig. 2 C and 2D have shown the cross section at the pressure roll of the process of two steps that pressure are applied to the tire layer that is arranged on the tire assembly drum.
Fig. 3 A shows the front view according to second embodiment of the present utility model, alternative pressure roll; With
Fig. 3 B and 3C have shown respectively according to the line II IB-II IB in Fig. 3 A and the sectional view of line II IC-II pressure roll IC, alternative.
The specific embodiment
Fig. 1 shown according to the utility model first exemplary embodiment, have the assembly drum 3 that applies zone 2 and be used for to admit tire layer 31 and be used for tire layer 31 is pressed in the tire building equipment 1 of the pressure roll 4 on the assembly drum 3.
Fig. 2 A has shown the pressure roll 4 according to first embodiment of the present utility model.Pressure roll 4 has rotatable fixing axle 40 or non-rotatably remains on axle 40 in the fixture 24.Pressure roll 4 comprises disk 41 a plurality of shape unanimities or equal radii, and they non-rotatably are arranged on the effective active length of axle 40, vertically directly approaching each other of axle 40.Disk 41 has about 110 millimeters external diameter.Three disks 41 partly cut to show the internal structure of described disk 41 open.
Fig. 2 B, 2C and 2D have shown the cross section of the internal structure of a disk 41.This disk 41 represents all disks 41 in pressure roll 4.Disk 41 has the interior section 42 that has annular circumferential and the exterior section 43 that centers on the annular of interior section 42.Disk 41 comprises ball bearing 44, and it is arranged between interior section 42 and the exterior section 43, is used for allowing exterior section 43 around interior section 42 rotations.Interior section 42 has the dimple 45 of rectangle substantially.Dimple 45 limits by two sidewalls 46,47, diapire 48 and upper wall 49.It is about 75 millimeters that diapire 48 and upper wall 49 limit dimple height Z.Axle 40 is contained in the dimple 45 of disk 41 in one way, and this mode will be described below.
Fig. 2 B, 2C and 2D have also shown the cross section of axle 40.Axle 40 has the cross section of rectangle substantially, and by both side surface 56,57, bottom surface 58 and end face 59 limit.The sidewall 46,47 of the dimple 45 of disk 41 is slidably disposed on the side surface 56,57 of axle 40, therefore can be in a direction with respect to axle 40 translation, and this direction is parallel with the side surface 56,57 of axle 40.The bottom surface 58 of axle 40 and end face 59 limit the high H of axle and are approximately 50 millimeters.50 millimeters the axle high when pressure P is applied to tire layer 31, prevent the axle 40 bendings.
The dimple height Z of disk 41 is greater than the high H of axle, so disk 41 can move in the border of its dimple 45 in a described direction that is parallel to sidewall 46,47 with respect to axle 40 in the mode of translation.Dimple height Z and the difference of axle between the high H have determined that disk 41 can be with respect to the range of axle 40 in a described direction moves to the border of dimple 45 apart from S.In this embodiment, dimple height Z is approximately 75 millimeters, and the high H of axle is approximately 50 millimeters.Therefore, disk 41 range that can move with respect to axle 40 apart from S approximately be 25 millimeters or approximately dimple height Z 1/3 or 33%.
Axle 40 is equipped with a plurality of plunger shaft or holes 52, and is corresponding with each disk 41, is parallel to the side 56,57 of axle 40 and in the radially extension with respect to disk 41.In the hole 52 of each radially-directed, admit a piston 51 is arranged.Piston 51 is provided with piston rod 50, and it can move to extended position and another location, and wherein piston rod 50 is contracted in the bearing 52 fully, and is concordant with the lower surface 58 of axle 40.At contraction state, piston 51 can not stretch out from axle 40, thereby permission axle 40 and disk 41 can be relative to each other in the longitudinal sliding motions of axle, and piston can not hinder described slip.This assembling for pressure roll 4 is particularly advantageous.In assembling process, before axle 40 is inserted in the dimple 47 of disk 41 afterwards or utilizing the dimple of disk to make disk 41 slip over before the axle 40, piston 51 can be put in the hole 52 of axle 40.Axle 40 can be coupled in the dimple 47 of disk 41 subsequently, and perhaps disk 41 can one by one or be made the as a whole axle 40 that slips over.In case axle 40 has inserted, in order to prevent disk 41 with respect to the slip of axle 40, be provided with and each disk 41 or one group of cam or dividing plate that disk 41 is connected, with vertical at axle 40 of the fixed-site of described disk 41.
Axle 40 has pressure medium channel 53, and this pressure medium channel and each piston 51 fluid are communicated with to move the piston rod 50 of piston.The piston rod 50 of piston 51 can stretch out from its hole 52, thereby engages with the diapire 48 of dimple 47.Piston rod 50 has a scope, and it equals range substantially apart from S, so stroke distances S can fully utilize.By stretching out piston rod 50 further, disk 41 can move past stroke distances S in one way with respect to the fixed position of axle 40, and this will be described below.
Shown in Fig. 2 A-D, be set to equably pressure P is applied to tire layer 31 according to the pressure roll 4 of first embodiment, especially comprise the tire layer 31 of tyre carcass(-se) layer 31, do not consider the irregular body relevant with described tire layer 31.
Fig. 2 B has shown such situation, and wherein pressure roll 4 is in raised position, breaks away from and engaging at the tyre carcass(-se) layer 31 of tire assembly drum 3.Tyre carcass(-se) layer 31 supplies on the circumferential surface 30 of drum 3 from conveyer 21.When tyre carcass(-se) layer 31 when drum 3 twines, the front end of tyre carcass(-se) layer 31 by cramping body 32 against circumferential surface 30 clamp, clamping or maintenance.In this embodiment, cramping body 32 is magnetic clamping bars, and it adheres to the round metal perimeter surface 30 of drum 3.The thickness range that magnetic clamping bar 32 has is the 5-10 millimeter.Clamping bar 32 is formed on the top of tyre carcass(-se) layer 31 along the irregular body of the part of the position of the circumferential surface 30 of drum 3.
Fig. 2 C has shown such situation, wherein, applies in the process of tyre carcass(-se) layer 31 at drum 3, and pressure roll 4 moves into bonding stations, so disk 41 becomes with tyre carcass(-se) layer 31 and engages.Fig. 2 B utilizes circle II B to represent the original position of pressure roll 4.Pressure medium, for example air supplies to piston 51 by pressure medium channel 53, so disk 41, from their initial and tyre carcass(-se) layers 31 in conjunction with, press tyre carcass(-se) layer 31, thereby at pressure direction P pressure be applied to described tyre carcass(-se) layer 31.
Fig. 2 D has shown such situation, and wherein drum 3 is further rotated, and remaining tyre carcass(-se) layer 31 is fed on the circumferential surface 30 of drum 3, contacts under clamping bar 32 with the front end of tyre carcass(-se) layer 31 up to the rear end of tyre carcass(-se) layer 31.At this moment, finished once complete rotation at the clamping bar 32 of the front end of tyre carcass(-se) layer 31, and by pressure roll 4.At this moment, clamping bar 32 is formed on obstruction or the irregular body for pressure roll 4 on the top of constant thickness D of tyre carcass(-se) layer 31.In known tyre building machine, movably fixture 24, and as shown in Figure 1, raised position is moved or moved to rise, so pressure roll 4 fully towards raised position, allow clamping bar 32 to pass through from the below of pressure roll 4.Therefore, pressure roll 4 is done as a whole, comprises axle 40, rises.Yet this does not wish to occur, because can cause being applied to by pressure roll 4 inconsistent the or interruption of the pressure P on the tyre carcass(-se) layer 31 like this.
In according to tyre building machine 1 of the present utility model, dimple height Z and the high H of axle selected like this, so range upwards slides with respect to axle 40 apart from the enough disks 41 of S, thereby allowed the clamping bar 32 under the disk 41 to pass through.Preferably, range surpasses clamping bar thickness apart from S, wherein surpasses or the part authorized pressure P of remaining stroke distances S is applied to tyre carcass(-se) layer 31.In this embodiment, clamping bar thickness is approximately 10 millimeters, impels disk 41 to move up, up to half range apart from S.The initial position of the pressure roll 4 in Fig. 2 B and 2C utilizes round II B and II C to represent respectively.
Above-mentioned pressure roll 4 also can be used for exerting pressure P to tire layer, and this tire layer comprises the assembly of cushion, cap strip and tread ply, is used for cooperating the irregular body related with described assembly.The tread ply that is used for tire is provided with the end face of tyre surface profile and inclination or usually at the tyre surface shoulder of the end of tread ply, wherein its contact cushion.Therefore, the assembly of cushion and tread ply has a profile, and it has along the thickness of the change width of assembly at cross section.The known pressure roller is not used to cooperate with cushion and tread ply, because associated difference in height especially at the shoulder of tyre surface, surpasses the range distance of known disk usually.The known pressure roller can not be applied to pressure the cross section of the whole width of tyre surface in this case equably.By the range distance is increased to about 25 millimeters stroke distances S, the height change of cushion and tread ply can be handled, and needn't rise the axle of pressure roll.
Fig. 3 A, 3B and 3C have shown second embodiment alternative, pressure roll 104, especially are suitable for such purpose, are about to the assembly that pressure is applied to cushion 33, cap strip and/or tread ply 34.Alternative pressure roll 104 is substantially with identical at the pressure roll 4 shown in Fig. 2 A-2D, and it is suspended on movably in the fixture 24 in identical with pressure roll shown in Figure 14 substantially mode.The pressure roll of replacing 104 comprises non-rotatable axle 140, is provided with a plurality of disks 141 and a plurality of for the piston 151 that moves disk with respect to axle 140 in non-rotatable mode on axle 140.
Fig. 3 A has shown such situation, and wherein alternative pressure roll 104 declines engage with the assembly with cushion 33 and tread ply 34.Each disk 141 individually moves along stroke distances S, and stroke distances S depends on buffer layer thickness B and the local tread ply thickness T in the part of the position of disk 141 along axle 140.
Fig. 3 B has shown the cross section of a disk 141, and it engages at the top of possible extreme higher position with tyre surface 34 on axle 140.Fig. 3 C has shown the cross section of a disk, its on axle 140 in shoulder or the engage sides of possible extreme lower position and tyre surface 34.The initial position of alternative pressure roll 104 utilizes circle II IA to represent that the difference of the position between Fig. 3 A and 3B has shown the stretching, extension of alternative pressure roll 104 in Fig. 3 A, and it can cooperate with the irregular body of cushion 33 and tread ply 34.Especially, stroke distances S is such, and one of a plurality of disks 141 can become with the thinnest part of wheel hub and engages, and simultaneously, another of a plurality of disks 141 engages with the thickest part of profile, needn't change axle 140 with respect to the position of the assembly of cushion 33 and tread ply 34.Like this, pressure P can be applied on the whole width substantially of assembly of cushion 33 and tread ply 34 equably.
Selectively, the axle 140 of alternative pressure roll 104 comprises lower shaft part 161 and upper axis part 160.Lower shaft part 161 comprises hole 152 and pressure medium channel 153. in the assembling process of alternative pressure roll 104, and lower shaft part 161 can be inserted into before upper axis part 160 in the dimple 147 of disk 141.The disappearance of upper axis part 160 can provide more maneuver space being installed on the piston 151 for lower shaft part 161, and makes lower shaft part 161 be connected to disk 141 by piston 151.This also allows the piston rod 150 of piston 151 to be inserted in the slit of the special use in the diapire 148 of dimple 147.In case piston rod 150 and the engagement of the slit in the diapire 148 of dimple 147, disk 140 are regularly against slipping into the vertical of axle 140.After lower shaft part 161 was correctly installed, upper axis part 160 can be inserted.Upper axis part 160 is finished the shape of axle 140, and limits such degree that moves to of lower shaft part 161, and namely piston rod 150 can not leave their slit.
Be understandable that top description comprises the explanation to the operation of preferred embodiment, this does not also mean that restriction scope of the present utility model.From top description, many variations also are apparent to those skilled in the art, and this is also included within the spirit and scope of the present utility model.
Put it briefly, the utility model provides a kind of tire building equipment with pressure roll, wherein pressure roll has non-rotatable axle and a plurality of radially disk that is arranged on the uniform shapes on the described axle, wherein each disk comprises interior section and exterior section, wherein interior section has the dimple that holds axle, wherein, in a direction, the length that dimple has greater than a described direction the axle corresponding size, wherein the length at a described direction dimple allows disk with respect to the axle translation, and allowing another disk to move the LAP distance in a described direction, it is as the passage of the tire layer under the disk and the irregular body related with described tire layer.
Claims (10)
1. tire building equipment, this equipment comprises assembly drum and pressure roll, wherein assembly drum is provided for admitting tire layer around its circumferential surface, wherein pressure roll is movable in the position, in this position, pressure roll abuts against on the tire layer on the assembly drum and with the circumferential surface of assembly drum and cooperates, so that pressure is applied to tire layer, wherein, pressure roll is equipped with at the longitudinal extension of pressure roll, the non-rotary axle disk consistent with a plurality of shapes, described disk as one man is arranged on the described axle in the vertical direct shape close to each other of axle, wherein each disk comprises the interior section that non-rotatably is supported on the axle and rotatably is supported on exterior section on the interior section, wherein interior section has the dimple that holds axle, wherein in a direction, the size of dimple is greater than the size of the correspondence of the axle in a described direction, wherein the size of dimple in a described direction allows disk with respect to the axle translation, and allow other disk to move the LAP distance in a described direction, it is as tire layer and irregular body the passage disk under related with described tire layer, wherein irregular body comprises cramping body, is used for keeping tire layer against the circumferential surface of assembly drum or keeps cushion, varied in thickness in the assembly of cap strip and/or tread ply.
2. tire building equipment according to claim 1, wherein difference limits the range distance between the size of the size of the dimple of a described direction and axle, and the trip distance is 25 millimeters at least or is at least 33% of the size of dimple in a described direction.
3. tire building equipment according to claim 1, wherein the difference between the size of the size of the dimple of a described direction and axle limits the range distance, the trip distance be at least 27 millimeters or be at least the dimple in a described direction size 36%.
4. tire building equipment according to claim 1, wherein, difference between the size of the size of the dimple of a described direction and axle limits the range distance, the trip distance be at least 30 millimeters or be at least the dimple in a described direction size 40%.
5. tire building equipment according to claim 1, wherein cramping body is the magnetic clamping bar, it has the thickness of 5-10 millimeter scope.
6. tire building equipment according to claim 5, wherein, the part of described stroke distances allows the passage as the clamping bar of disk bottom, and wherein remaining stroke distances authorized pressure is applied to tire layer.
7. tire building equipment according to claim 1, wherein the assembly of cushion and tread ply has a profile, in cross section, it has along the thickness of the change width of assembly, wherein said stroke distances is such, make in a plurality of disks one can be placed in the thinnest part of profile and engage, and simultaneously, another of a plurality of disks engages with the thickest part of profile.
8. tire building equipment according to claim 1 wherein, is applying pressure to by pressure roll in the process of tire layer, and axle is in fixing position with respect to assembly drum.
9. tire building equipment according to claim 1, wherein pressure roll is equipped with the piston for each disk, piston is connected to axle with corresponding disk, wherein each piston is set to control individually corresponding disk with respect to axle and translation relative to each other, and wherein piston has the stroke suitable with the stroke distances of disk.
10. tire building equipment according to claim 9, wherein piston can move between extended position and punctured position, and wherein, at punctured position, piston fully is contracted in the axle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2009576 | 2012-10-05 | ||
| NL2009576 | 2012-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203141856U true CN203141856U (en) | 2013-08-21 |
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ID=48969408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220595197 Expired - Lifetime CN203141856U (en) | 2012-10-05 | 2012-11-13 | Tire molding equipment |
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| Country | Link |
|---|---|
| CN (1) | CN203141856U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378946A (en) * | 2015-08-06 | 2017-02-08 | 青岛软控机电工程有限公司 | Joint device of forming machine, and forming machine |
| CN106378947A (en) * | 2015-08-06 | 2017-02-08 | 青岛软控机电工程有限公司 | Clamping device and forming machine with same |
| WO2019182439A1 (en) | 2018-03-22 | 2019-09-26 | Vmi Holland B.V. | Pressure roll and method for pressing a tire layer on a tire building drum |
| RU2779096C2 (en) * | 2018-03-22 | 2022-09-01 | Вмай Холланд Б.В. | Clamping roller and method for pressing tire layer on reel for tire assembly |
-
2012
- 2012-11-13 CN CN 201220595197 patent/CN203141856U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378946A (en) * | 2015-08-06 | 2017-02-08 | 青岛软控机电工程有限公司 | Joint device of forming machine, and forming machine |
| CN106378947A (en) * | 2015-08-06 | 2017-02-08 | 青岛软控机电工程有限公司 | Clamping device and forming machine with same |
| CN106378946B (en) * | 2015-08-06 | 2018-10-02 | 青岛软控机电工程有限公司 | Molding machine piecing devices and molding machine |
| WO2019182439A1 (en) | 2018-03-22 | 2019-09-26 | Vmi Holland B.V. | Pressure roll and method for pressing a tire layer on a tire building drum |
| CN111902262A (en) * | 2018-03-22 | 2020-11-06 | Vmi荷兰公司 | Pressure roller and method for laminating a tyre on a tyre building drum |
| US11426961B2 (en) | 2018-03-22 | 2022-08-30 | Vmi Holland B.V. | Pressure roll and method for pressing a tire layer on a tire building drum |
| RU2779096C2 (en) * | 2018-03-22 | 2022-09-01 | Вмай Холланд Б.В. | Clamping roller and method for pressing tire layer on reel for tire assembly |
| TWI804592B (en) * | 2018-03-22 | 2023-06-11 | 荷蘭商Ｖｍｉ 荷蘭公司 | Pressure roll and method for pressing a tire layer on a tire building drum |
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Granted publication date: 20130821 |
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