| 摘要 |
<p>The invention provides a tyre cord layer jointing device and jointing method. Accordingly, tyres with excellent high-speed uniformity can be manufactured at a high production rate without needing reserving a relatively large amount of rubber among cords or pre-cutting the two edges of each cord layer in a mode that even a relatively small overlapped part can still reliably joint the cord layers with a stable strength. The tyre cord layer jointing device comprises an elevating part and an elevating unit. Needle-shaped projections are distributed on the elevating part at specified intervals along the width direction of the two cord layers. Each of the cord layers is formed by using unvulcanized rubber to cover a cord arrangement body which is formed by parallelly arranging the cords. The elevating unit enables the needle-shaped projections to spur the overlapped part until the front end parts of the needle-shaped projections penetrate through the overlapped part. Moreover, the elevating unit enables the elevating part to lower down to make the unvulcanized rubber of one cord layer invade into the other cord layer and then enables the elevating part to rise up to pull the needle-shaped projections out of the overlapped part after the spurring.</p> |
