| 摘要 |
A packing-type vacuum-forming composite board welded by ultrasonic welding comprises a plastic surface plate (11), a plastic bottom plate (12) and filling materials (13,14) packed between the plastic surface plate (11) and the plastic bottom plate (12). The edge of plastic surface plate (11) overlapps the edge of plastic bottom plate (12), wherein a welding rod (15) made of plastic is arranged along the edge at the overlapped joint region between the plastic surface plate (11) and the plastic bottom plate (12). The welding rod (15) is connected to the plastic surface plate (11) and the plastic bottom plate (12) by ultrasonic welding. The problem that local bonding is not uniform because the whole plane made by vacuum-forming process is not completely melted when the large area of plate welded by ultrasonic welding is solved by arranging the welding rod (15) at the welded joint region between the plastic surface (11) and the plastic bottom plate (12). The composite board can be widely used for furniture such as a surface plate of a table, a separator plate of bookshelf or cabinet, a baffle of bed head or bed foot etc. and for other surface plate required.
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