polystyrene and v-nails`

[geperry]

I'm having a problem!!!!!!!!!!! Have been putting together a lot of polystyrene frames. Quite wide, the rear/outside is a bit thicker than the inside. The inside or front V-nails (VN2+1) go in alright, but the rear won't go in all the way. Have raised the pressure up to 100! Tried both soft and hard wood v-nails! I'm using a slow setting hot glue, but that doesn't affect the v-nails. Anyone have any solutions. Have called ITW and left messages with their tech dept. Waiting to hear back from them.

 

[Jim Miller]

Your problem is common. The vertical clamp works OK for the first v-nail, because that's where it's positioned, but when you trigger the next one, it doesn't hold the moulding down properly.

The moulding part jump upward when the v-nail goes in...right?

With only one vertical clamp, it's necessary to relocate it over the position of each v-nail you insert. When you have the vertical clamp repositioned, it should be OK.