Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1990-09-07
1993-12-28
Knable, Geoffrey L.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156123, 156134, 1564064, 156408, B29D 3030
Patent
active
052736008
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method employed in the building step of a green tire, in which the tire component material, such as a side wall, a breaker cushion, a cross ply tire tread and a bead apex, is adhered onto a carcass on a tire building former, and an apparatus used therefor.
BACKGROUND ART
In a green tire building step of a radial tire, particularly having a structure called tread-overside-wall construction (a structure in which in the cross section of the tire the edge of the tread layer is located over the top of the side wall layer and stacked on it), a cylindrical carcass is formed by adhering tire component materials thereof directly and successively onto the former first, and then the side wall material, for example, integratedly molded by extruding together with the clincher apex is adhered onto the carcass. Hitherto, this adhering work was manually done by workers, but the adhering work required a high degree of skill and the resulting quality was apt to be unstable and uneven because this adhering work was an adhesion of unflat material an unflat surface. Furthermore, the nature of the adhering work not only caused a problem that the uniformity of the tire was directly influenced but the nature itself became an unfavorable factor impeding the automation of the adhering operation.
A purpose of the present invention is to solve the problem of the above-mentioned conventional method for adhering a tire component material to provide a method and an apparatus used therefor which enable a worker to efficiently produce a green tire always having uniform quality regardless of his or her skill, experience or individuality.
DISCLOSURE OF THE INVENTION
The present invention employs the structural feature described below in order to solve the abovementioned problem.
Namely, according to the present invention, there is provided an adhering method for tire component material characterized in that a cylindrical carcass formed in advance is put onto a drum-shaped tire former having an outside circumferential length shorter than an inside circumferential length of the carcass, then, with the carcass being pressed against the former by a pressing mechanism both from above and from a sideward direction relative to the former surface, a front edge of the tire component material held by a suitable holder is drawn out and delivered onto the former and laid on the carcass attached onto the former, thereafter the former is rotated by a predetermined rotation angle with the tire component material being pressed against the carcass on the former by the pressing mechanism so that the tire component material is adhered onto the carcass, and the drawn out tire component material is cut off in a length corresponding to the sum of a full circumferential length of the carcass and a required length for joint, subsequently, the former is rotated again to complete adhesions of the tire component material onto the full circumference of the carcass and the front edge and a last edge of the tire component material are jointed by pressing and sticking by means of the pressing mechanism.
Furthermore, according to the present invention, there is provided an adhering method for tire component material characterized in that a cylindrical carcass formed in advance is put onto a collapsible drum-shaped former with a diameter reduced to provide a shorter outside circumferential length than an inside circumferential length of the carcass and then the diameter of the former is increased to bring the carcass and the drum outside circumference into close contact with each other, then with the carcass being pressed against the former by a pressing mechanism from above relative to the former surface a front edge of the tire component material held by a suitable holder is drawn out and delivered onto the former and laid on the carcass attached onto the former, thereafter the former is rotated by a predetermined rotation angle with the tire component material being pressed against the carcass on the former by th
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patent: 4844768 (1989-07-01), Kimura
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Kudou Yasuhiko
Kurashima Sadao
Tanihara Itsuo
Yamamori Shuichi
Knable Geoffrey L.
Sumitomo Rubber Industries Ltd.
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