| 摘要 |
<p>A process for forming a panel from two or more thermoplastics sheets comprising the steps of separately feeding the sheet simultaneously through a controlled temperature furnace so as to cause expansion thereof, heating at least opposed surfaces of adjacent sheets to be further heated to their melting temperature and then causing said sheets to converge together until they abut one another whereupon the opposed surfaces which have been further heated fuse or weld together, the panel thus formed then being calibrated and cooled. The invention also relates to an apparatus comprising various means for carrying out such a process and to a panel thus produced. <IMAGE></p> |
