Using XD, a 63 rotary vane vacuum pump, no leakage place, PVC membrane is 16 silk, edge suction well, that is, the middle groove can not suckBefore, the same board was pulled down at one time, and now it's like this.
3, PVC must bake soft, baked is not soft, certainly not suck, but you said the edge down, I guess you this problem is the first two of any one of the wrong.
2, if the narrow slot suction is not in place, such as the 3 mm slot or milling knife, it must suck up.
1, general plastic is density board more, but if the density board on the back of the melamine layer (that is, the waterproof coating white), so it is not breathable, if the plate engraving, when work is suction blister machine does not go.
