Book binding industry has always been the most important cornerstone of the national education, cultural undertakings, and news media, a good health book binding needs to be observed at all times to some of the industry's inevitable hardware and software failures, the following is some experience summary.
Book binding problems and solutions
(1) the book spine uneven, showing round convex:
<1>Problems that may occur：The height of the pallet is not enough.
<2> Corresponding solutions：2.1 Should be adjusted to the standard gap between the back of the pallet
2.2 Improve the book cover weight
2.3 Perfect binding production process more than a gram cover paper must indentation, creasing the thickness of the book block is equal to or less than the book core thickness 5mm.
(2) Books unglued, loose pages:
<1>Problems that may occur：1.1 Not enough depth the Book block milling back, signatures page is not completely milled single page
1.2 Grooving is not deep enough
1.3 Hot melt adhesive temperature is too low, making the glue poor mobility
1.4 Book spine Hot melt glue is too thin
1.5 Error model of the hot melt adhesive
1.6 Gluing machine can not glue
1.7 Different paper paste is not firmly
<2> Corresponding solutions：2.1 To increase the depth of milling back and improve the folding quality
2.2 To adjust slotted knife depth and keep slotting knife sharp
2.3 The hot melt adhesive is heated to 160 ° C ~ 180 ° C before use. Adjusted hot melt adhesive melting point, as the workshop temperature (hot melt adhesive requirements workshop temperature of 20 ° C to 30 ° C) in the winter, especially in the north enterprise, Binding workshop have heating equipment; South gum workshop in order to ensure the quality of the bales as the need for heating equipment.
2.4 Control the thickness of the gum, the general control the between 0.6mm ~ 2m m, and adjust the distance between the on the tire and the back.
2.5 Hot melt adhesive should match the plastic charter models and seasonal
2.6 The milling groove after paper wool, paper dust and paper scraps prompt cleaning, so as to avoid the brush glue
2.7 Coated paper, offset paper bound book block mixed, grooving depth, the glue should be subject cement in two paper
(3) The back is not square:
<1>Problems that may occur：1.1 Do not use the sharp knife milling back lead to the back Founder
1.2 Uneven glue on the gum
1.3 Pallet setting machine adjustments caused by improper book back Founder
1.4 The signatures finishing uneven
1.5 Setting time is too short, the books fall fast, overlapping
<2> Corresponding solutions：2.1 Replacing the sharp milling back knife
2.2 Adjust the glue structure, let the glue evenly on gum
2.3 Adjust the pallet setting bodies
2.4 Warranty stickers formation
2.5 In production, should be in accordance with the size and thickness of the book block to control the speed of the plastic charter; while paying attention to the principle of “thick books falling fast "to adjust the speed of the package , reducing hot melt adhesive open time.
(4) The cover is not flat, obvious cover bar lines:
<1>Problems that may occur：1.1 Excessive use of the side glue
1.2 The use temperature of the side glue is too low
<2> Corresponding solutions：2.1 Control the amount of the side glue
2.2 Raise the temperature of the side glue, according to the paper category, glue temperature control in about 120 ~ 160 ° C
(5) The backs of the perfect binder book has bubbles and empty plastic:
<1>Problems that may occur：1.1 Hot melt adhesive moisture, high water content
1.2 Milling back after notching the back is not flat and cause uneven gum, causing voids
1.3 Pallet and the back is not parallel
<2> Corresponding solutions：2.1 hot melt adhesive should be stored in dry warehouse
2.2 Check cutters, slotting knife is sharp or not, if not, timely replacement and grinding control gum applicator uniformity
2.3 Adjust the pallet
Book binding problems and solutions
(1) the book spine uneven, showing round convex:
<1>Problems that may occur：The height of the pallet is not enough.
<2> Corresponding solutions：2.1 Should be adjusted to the standard gap between the back of the pallet
2.2 Improve the book cover weight
2.3 Perfect binding production process more than a gram cover paper must indentation, creasing the thickness of the book block is equal to or less than the book core thickness 5mm.
(2) Books unglued, loose pages:
<1>Problems that may occur：1.1 Not enough depth the Book block milling back, signatures page is not completely milled single page
1.2 Grooving is not deep enough
1.3 Hot melt adhesive temperature is too low, making the glue poor mobility
1.4 Book spine Hot melt glue is too thin
1.5 Error model of the hot melt adhesive
1.6 Gluing machine can not glue
1.7 Different paper paste is not firmly
<2> Corresponding solutions：2.1 To increase the depth of milling back and improve the folding quality
2.2 To adjust slotted knife depth and keep slotting knife sharp
2.3 The hot melt adhesive is heated to 160 ° C ~ 180 ° C before use. Adjusted hot melt adhesive melting point, as the workshop temperature (hot melt adhesive requirements workshop temperature of 20 ° C to 30 ° C) in the winter, especially in the north enterprise, Binding workshop have heating equipment; South gum workshop in order to ensure the quality of the bales as the need for heating equipment.
2.4 Control the thickness of the gum, the general control the between 0.6mm ~ 2m m, and adjust the distance between the on the tire and the back.
2.5 Hot melt adhesive should match the plastic charter models and seasonal
2.6 The milling groove after paper wool, paper dust and paper scraps prompt cleaning, so as to avoid the brush glue
2.7 Coated paper, offset paper bound book block mixed, grooving depth, the glue should be subject cement in two paper
(3) The back is not square:
<1>Problems that may occur：1.1 Do not use the sharp knife milling back lead to the back Founder
1.2 Uneven glue on the gum
1.3 Pallet setting machine adjustments caused by improper book back Founder
1.4 The signatures finishing uneven
1.5 Setting time is too short, the books fall fast, overlapping
<2> Corresponding solutions：2.1 Replacing the sharp milling back knife
2.2 Adjust the glue structure, let the glue evenly on gum
2.3 Adjust the pallet setting bodies
2.4 Warranty stickers formation
2.5 In production, should be in accordance with the size and thickness of the book block to control the speed of the plastic charter; while paying attention to the principle of “thick books falling fast "to adjust the speed of the package , reducing hot melt adhesive open time.
(4) The cover is not flat, obvious cover bar lines:
<1>Problems that may occur：1.1 Excessive use of the side glue
1.2 The use temperature of the side glue is too low
<2> Corresponding solutions：2.1 Control the amount of the side glue
2.2 Raise the temperature of the side glue, according to the paper category, glue temperature control in about 120 ~ 160 ° C
(5) The backs of the perfect binder book has bubbles and empty plastic:
<1>Problems that may occur：1.1 Hot melt adhesive moisture, high water content
1.2 Milling back after notching the back is not flat and cause uneven gum, causing voids
1.3 Pallet and the back is not parallel
<2> Corresponding solutions：2.1 hot melt adhesive should be stored in dry warehouse
2.2 Check cutters, slotting knife is sharp or not, if not, timely replacement and grinding control gum applicator uniformity
2.3 Adjust the pallet