| 摘要 |
<p>PURPOSE:To prepare a packing material low in material loss in high productivity, by a method wherein plural synthetic resin nets are welded under heating in specific two heating regions at a predetermined pitch and the welded nets are cut to an appropriate length to be shaped into an almost honeycomb shape. CONSTITUTION:Plural numbers of synthetic resin nets 1 are introduced into a first heating region (i) and a second heating region (ii) from rolls 4 through separators 7. In the heating region (i), heaters 2 and a heat insulating spacers 3 are alternately arranged to every other one net. At each position shifted a half pitch from the first heating segion the second heating region (ii) is arranged in such a member that the positions of the heaters 2 and the heat insulating spacers in the first heating region (i) are replaced. The group of the nets 1 is brought to a stop state and the nets 1 are pressed and welded by a first and a second pushers 11, 12. In the next step, the nets 1, are shifted by one pitch to be pressed and welded by the first and the second pushers 19, 20. By repeating this operation, the welded nets are cut to a fixed dimension by a cutter 23 and non- heat welded parts of the nets are separated to shape the whole into an almost honeycomb shape.</p> |
