Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Tire body building type
Reexamination Certificate
2002-02-19
2004-02-24
Osele, Mark A. (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Tire body building type
C156S124000, C156S130000, C156S133000, C156S405100, C083S155000, C083S486100, C198S690100, C198S861100
Reexamination Certificate
active
06695949
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a feed device for strip-shaped tire components within a conveying apparatus (servicer) for a tire build-up drum, especially for a belt drum for the assembly of the belt package, whereby successively placed and rolled onto the tire build-up drum are a plurality of plies of different or differently pre-treated, essentially strip-shaped tire components that are bonded to the already applied materials, whereby the conveying apparatus is provided with
a) one or more storage means, preferably a drum storage means, as well as appropriate pertaining feed devices for the tire component, as well as
b) one or more cutting devices associated with the feed devices for cutting the strip-shaped tire component to length,
whereby the conveying apparatus is furthermore provided with one or more conveying lines/conveying paths in which the cut tire components are conveyed to the tire build-up drum.
In the classic manufacture of a new tire with a carcass built-up in a flat manner, the inner liner or inner plate of a tire, and the sidewalls, are first applied to a carcass build-up drum having a horizontal axis of rotation, and are rolled onto the circumference of the drum, as a result of which the still unvulcanized rubber materials are adhered together, as also occurs during the still later applied tire components or tire materials, depending upon need.
Subsequently, especially with truck or commercial vehicle tires, bead-reinforcing profiles are applied, for example so-called “chafers”, which can also be provided with textile or metallic load-carrying members, and are conventionally arranged in such a way that in the finished tire at least one carcass ply is disposed between the core and the chafer.
Furthermore, generally one or two carcass plies are applied that are comprised of rubberized textile or metallic load-carrying means. Depending upon need, there then follows the application of shoulder-filling profiles (shoulder pads) that in the finished tire have the function of providing a compensation between the belt contour, which is also flat at its edges, and the more greatly curved carcass contour at the belt edges.
Subsequently, with the aid of a carcass carrying and core-centering device, the bead cores, which are conventionally already provided with core sliders, are pushed and positioned over the drum. Bead core and core slider (apex) are hereby already present as a prefabricated unit that is produced on a separate drum (extensible drum) and are placed as prefabricated rings from the side over the plies that are already present on the tire build-up drum.
When the build-up drum is subsequently expanded, the prefabricated bead cores and the flat carcass are pressed radially against one another, so that the inner surfaces of the bead cores are adhered and connected with the outer carcass surface.
The drum is thereafter drawn together to a smaller diameter, and the carcass with the set bead cores—again with the aid of the carcass carrying and core centering device—is withdrawn from the drum and transferred to the expansion drum.
Parallel to the fabrication of the carcass, applied to a belt build-up drum in the separate belt manufacturing line are the belt plies, which in general are two or three, and with the manufacture of truck tires generally four rubberized steel cord plies; if desired, one or two plies of a nylon band can be provided. Belt cushion strips can be disposed between the individual belt plies. Finally, applied to this belt structure is the tread strip, which can be provided with an underplate.
A movable belt carrying device for accommodating the prefabricated belt package transports the thus resulting belt/tread strip structure to the expanding drum having the already centered, fixed and pre-expanded tire carcass, and positions this structure over the tire carcass.
This is now completely expanded and joined with the belt package, whereby with the expansion (bulging) of the carcass, the folding process is also effected, according to which the carcass ply ends are folded about the bead cores and the side portions are folded up. This process is carried out with the aid of bellows, whereby a center bellows expands the central portion of the carcass and side expansion bellows, in other words expansion bellows, which engage axially beyond the set cores, are used for folding up the side portions, possibly aided by presser rings (pushers), etc.
After the expansion and the connection of the carcass with the belt package, the belt carrying device is removed and the tread strip is rolled on together with the belt package.
After the deflating or release of the expansion bellows, the fabricated green tire is then removed from the expansion drum by further transfer devices and is vulcanized in an appropriate vulcanization mold, where it thus obtains its final shape with a molded tread strip profile, possibly also with sidewalls that contain writing and/or decoration.
Especially at the stations of the tire manufacturing, i.e. the manufacturing plant, at which a plurality of strip-shaped tire components are placed directly or at successive intervals on a tire build-up drum, in other words, for example, during the placement of four successive rubberized belt plies upon the belt build-up drum of a truck tire manufacturing, to facilitate and automate the manufacturing process so-called conveying apparatus or “servicers” are operated which, generally with a plurality of transport and cutting devices, transport the strip-shaped tire components from a plurality of storage means, cut them to length and at prescribed angles, transport them to the build-up drum, and there place them upon the already applied materials or components.
As storage means for strip-shaped tire components, these days generally coil or drum storage means/storage cassettes or modules are used in which the material needed for the tire components is placed in rolls and can be withdrawn over appropriate feed paths and via feed devices by means of the transport devices of the conveying apparatus. The storage means are hereby disposed directly on the conveying apparatus. The roller accommodating means/the roller bearing is generally driven in order to avoid tension on the material during withdrawal. In this connection, there are generally provided between the storage means and the transport devices compensation loops of the material that also serve this purpose and compensate for differences in speed between the roller drive and the transport device.
As a consequence of the number of storage means, or the number of the successively to be applied strip-shaped tire components, a corresponding number of required feed devices result within the feed path for the tire component. Thus, with a conveying apparatus for four rubberized belt plies upon the belt build-up drum of a truck tire manufacturing, in conformity with the four storage means for variously built-up belt ply materials, four feed devices are also required for the tire component.
At or under the cutting devices that are associated with the feed devices, transport lines begin that, from the spatially differently arranged feed devices/cutting devices, all must lead to the same destination, namely to the tire build-up drum, or to the point of application for the tire components that is disposed on the periphery of the tire build-up drum.
In this connection, with the tire components of still unvulcanized rubber materials used for the tire manufacture, for example with the belt plies that comprise rubberized load-carrying means, there exists the requirement for conveying the tire component without stretching, bending and other deformations, in other words in as flat a support as possible on a planar surface, to the tire build-up drum. The transport lines should therefore contain to the extent possible no bends or curves for guiding the tire components, and must have transport devices that convey the tire component in as flat a support as possible and exclusively in a linear direction from the locally/spatially separated feed de
Jungk Andreas
Morig Gerd
Ringhoff Hubert
Becker R W
Continental Aktiengesselschaft
Osele Mark A.
R W Becker & Associates
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