| 摘要 |
<p>A method for feeding web material for foaming of panels comprises the steps of: i. unwinding a plurality of web materials from reel means (3, 3A, 3B) that comprise one or more multiple reels (3A, 3B), on which are wound several distinct and superimposed web materials (4), to generate respective external coating layers for one or more panels; ii. advancing the web materials (4) simultaneously in a controlled manner along an advancement path and according to respective mutually parallel planes traversing a foaming region (9) of the continuous panels; iii. accumulating portions (7) of the web materials (4) in an accumulating station (8) located upstream of the foaming region (9); iv. grasping and holding in a joining operating region (11), upstream of the accumulating station (8), the end-flaps of the accumulation portions (7) and simultaneously separating said end flaps from the corresponding multiple reel (3A) once exhausted, so as to generate trimmed tail ends (13); v. cutting the initial flaps of the web materials (4) of a new reel (3B) to obtain trimmed head ends (14) to be joined to the respective tail ends (13), and holding the head ends (14) in the joining operating region (11) in a stationary position or in a relatively stationary position with respect to the corresponding tail ends (13); vi. bringing the trimmed tail ends (13) near, and superimposing them (13) on the respective trimmed head ends (14) so as to join simultaneously the accumulation portions (7) to the web materials (4) of the stand-by reel (3B). In particular, the aforesaid step ii) comprises the simultaneous and separate feeding of the web materials to an apparatus that is configured for depositing between two contiguous and facing web materials a reactant resin intended to form an intermediate layer of foam of each panel. Also the relative apparatus for implementing the aforesaid method is disclosed.</p> |
