At present, the folding way is divided into rotary press strip folding and triangle folding.Strip folding is after printing paper reciprocates along the radial cutting knife cutting into strips (3 ~ 5), after cutting the strips through the Angle of 45 ° steering rods for composite, repass hob cutting cutting, folding roller composite, finally after a machete folding form three sides open book.Triangle folding the most widely used, it is the rotary press printing paper by bending triangle, with the center line of the split between composite (folded), then through cutting paper cutting, folding knife roller composite into 8 open book, through the cotton tape will open book is transferred to a machete station 8, machete folding form 16 open book.
Today we will affect the triangle machete folding accuracy of folding way reason for brief analysis.After triangle and folding roller composite paper, book binding thicker, if using double paper printing, 16 p, 55 g/m2 for quantitative paper as an example, the composite the paper thickness of 0.5 mm, after a machete prone to error when folding, specific reasons are as follows.
(1) yarn with high speed, stable clamping book binding, folding error.
(2) the linear motion of machetes has led to the sideways trend of book binding, folding deviation.Machete trajectory of circular arc form, the blade force by X, Y, two directions, the X axis force of FX to book have a lateral force, lateral force makes the book a sideways trend, so the book come into contact with a machete and book before entering the squeezing roller for composite movement, the movement, instability in book form folding deviation.
(3) the cotton tape tension, friction cause folding error.If the cotton tape tension on both sides of the paper, and the friction between the book, will lead to post when folding, book 1 lateral resistance, eventually led to the folding skewed. (Gold Printing Group) |
