Automatic box making machinery in the book case work, it often happens that some wrapping edges pop open or partially pop open, there are the following reasons for this
(1) box making machinery in the adhesive quality is poor or solvent added too large, easy to cause adhesive concentration is too low, resulting in low viscosity packaging and decorating, as far as possible in the use of better animal protein adhesive, flexible control of the concentration of adhesive.
(2) installed in a room equipped with air conditioning operation, temperature control at 18 ~ 24 ℃, like in this environment if you can play the highest efficiency of the machine, but also more savings in the amount of glue. It is recommended to generally work in this environment
(4) or in the operation of the sealing edge bit too small. Normal wrapping edge bit should be about 15mm other packaging, too narrow wrapping edge bit is also easy to pop open.
Box making machinery in the case of wrapping edge is not tight, empty edge, there are also several causes
(1) Gray cardboard is cut by the cutter, because the cutter cuts out the gray cardboard will leave a knife edge (that is, the gray cardboard cross-section of the top and bottom of the uneven), then in the process of making the leather case is prone to empty edges or wrapped edges are not tight, usually we recommend the use of cardboard slitter cut gray cardboard booklet printing, you can avoid this kind of situation. The gap in the original is too large, more than 2mm over the normal working range (the normal working range is usually about 1mm).
(2) There is a difference in the flatness of the bottom mold table, which should be leveled.
The crust blistering generally has the following two reasons.
(1) Generally easy to do larger book cover blistering, this may be the cover glued to the air is not discharged caused, then we can add a more in the middle of the suction nozzle plate cross or in the bottom of the mold to add a layer of sponge.
(2) cover did not contact the adhesive or two-way pressure flat pressure is too small inkjet, generally depends on the kind of situation to do the adjustment.
