Binding process skew problem occurs because the back milling and processing – perfect binding, milling back – Printing Industry
Back formation uniform milling, milling accuracy and stability back volume is the perfect binding books and quality control of an important project. However, the routine perfect binding production process, because of operating techniques, equipment performance and process methods books such as the core reason for the uneven thickness, so that the back milling process there are some quality defects … …
HC printing network Back formation uniform milling, milling exact amount back stability, is perfect binding books and quality control of an important project. However, the routine perfect binding production process, because of operating techniques, equipment performance and process methods books such as the core reason for the uneven thickness, so that the back milling process there are some quality defects. Therefore, the only correct understanding of the causes of milling backs, from the technical measures and checks to be strictly regulated in order to better ensure the quality of books and Binding.
Mechanical milling bad back due to skew
1, pallet at the bottom of bores and wear loose shaft deflection caused by milling back
When the pallet at the bottom of the shaft bores and more powerful use of the wear occurs, the pallets of face and sliding the guide book folder, inevitably will lose stability, and accurate work in parallel state requirements, then As the positioning of the unstable core book is bound to lead to fewer side while many milling milling bad happens. Recently I had already encountered as such failures factory, pallet up and down direction of the gap amounted to 23 mm loose, resulting in both ends of the back of volume sizes and milling conditions. Restored after treatment to eliminate the abnormal clearance, to ensure the uniform and stable milling back the amount.
2, pallets adjust skew bad back caused by milling
Milling depends mainly on the size of the amount of back care book plate height adjustment to achieve. Amount from the milling process back situation, the book block thickness of the thinner, the back of the less milling more help to improve the accuracy of milling backs. When the book block thickness of the large amount of milling back too large, resistance will inevitably increase due to the work of milling backs, so that deformation or deflection of the milling back prone to adverse circumstances. Therefore, in order to be able to mill off the best quote in the book page of this condition, no amount of milling back to multi-milling as well as the book version of the work entrusted to adjust height of the guiding ideology. In addition, if the adjustment of improper care book plate so rugged, they inevitably will lead to skewed milling back to the book board book back side of a high care less milling, on the other side side of the small milling. This should adjust the pallet through the bottom of the screw, so care guide book plate and parallel to ensure uniform milling back.
3, milling cutter work back height and back plywood mill deflection caused by too much clearance
Milling cutter back the high end of the work space with plywood the size of the milling quality has a direct relationship between the back, when the milling cutter and plywood back spacing is too large, because of the back blade milling work on the back produces resistance, which splint in the absence of a good time to play prop the back of the case folder, the milling process, it is easy to make back the back part of deformation, resulting in uneven and skewed milling back. Therefore, in order to ensure the quality of milling backs, should be transferred to the best milling cutter working condition, as close as possible to make plywood mill bottom tip, tip not grazing in the case of plywood, the smaller the gap the more they help to improve precision milling back.
4, milling cutter blade back blunt mouth deflection caused by milling back
Milling back edge I decided to keep sharp is an important condition for the precision milling back, when I use the wear and tear of a dull blade, the inevitable resistance of work due to the increase of the back milling milling easily deform or skew the situation back. Particularly thick book milling before the core books, the most likely entrants to the knife edge of the back part, because of resistance light and multi-milling, the rear of the back due to resistance of large and small milling machine work, milling around the back section of the amount of deviation of up to 23 mm more. We had already encountered in the operation of such cases, transferred here and there the machine did not solve the problem, by the replacement of the Lions after sharp cutter, milling capacity size of back bias fault instantly get a better elimination.
5, the book does not clip or two gap size is not parallel to the deflection caused by the mill back
Milling back on the back when the blade I have some degree of impact, in this case, if two books folder splint gap is too big or there is a big tune a little bad situation, the book can not play a folder folder the role of tight book block, then the process of milling the book block on the back very easily up the diversion, resulting in milling back skew fault conditions. Therefore, by adjusting the control should be the distance between the two plywood washer thickness, so that even when working status of plywood clamped core throughout the book to ensure the accuracy milling back.
6, book clip up and down the back loose skew caused by milling
We know, milling folder back along the rail in the book work done during taxiing, the characteristics of this work clearly show that the book between folders and tracks with precision, the need to maintain a more stable and reliable, in order to avoid written folder in the operation of beating phenomenon. When the book folder on the ball bearing and guideway wear gap occurs when copper is bound to be unstable because of the book running lead milling folder back or allowed to skew failure occurs, this, as long as the replacement of worn parts of the new accessories, to ensure the quality of milling back.
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