Experience Exchange: Analysis of Key Points in Quality Control of Perfect Binding Products
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Quality control is nothing more than two aspects: one is the dataization and standardization of each process; the other is the process design and workflow management. The former requires standard operations for each process, and the latter is the operational requirements for the development of work processes and processes. This shows that in addition to a unified process management, everyone is required to do their best and take responsibility. 80% of quality accidents in production practice are caused by the lack of responsibility of the operators. 20% is caused by process reasons and materials. To make 80% of accidents disappear in the bud, you must understand the technical requirements, you must not stay in the first half, and you must have the spirit of excellence. Now take the ZXJD440A medium speed flat binding line as an example to talk about the common problems in the production process.
1. Failure in binding production
1) Round back
In the book clip, the book position is high and the signature is too low. The extension of the book should be controlled at 11~12mm. The position of the solid board should be improved. If the grooving knife is too high, the position of the grooving cutter should be reduced, and the groove depth of the signature should be controlled within 1.0mm.
2) Oblique book
The temperature of the glue is too high. When the book is closed, the back of the book is not solidified and falls. The temperature of the glue should be adjusted according to the paper quality and seasonal changes. Generally, the temperature is controlled at 160-180 ° C. If the machine speed is too fast, the glue with short curing time should be used and reduced. Machine speed; the book clip opening is too large, should be adjusted to the thickness of the signature plus 15mm, and should also narrow the book aisle, the bar.
3) Book binding, the cut portion is not rectangular
The parallelism and verticality of the solid board and the book holder should be adjusted to make the book back and mouth consistent.
4) The cover is sticky
There is wild rubber on the upper sealing drum, sticking to the cover of the book, the bottom plate of the forming mechanism is glued, and the clamping plates on both sides are glued to seal one and seal four, so the residual glue should be removed frequently, and the silicone rubber should be used to prevent the wild rubber; The rubberizing time of the rubber wheel is too long, and the wild rubber is generated. The rubberizing time should be finely adjusted, and no wild rubber should be generated and the rubber temperature should be moderately lowered.
5) Book cover folds or misplacement
If the book position in the book clip is too high, the position of the solid plate should be increased; if the groove cutter is too high, the position of the groove cutter should be lowered; if the glue temperature is too low, the glue temperature should be raised; the glue stick should have glue, and the glue stick should be adjusted. The gap of the rubber plate is made zero, and the working condition of the heating pipe in the glue stick is checked; if the binding speed is too fast, the machine speed should be lowered and the drying time should be extended before cutting.
6) Bar line
If the stack is too high or the book position is low, the position of the solid plate should be lowered; the grooved knife should be too low, and the position of the grooved cutter should be raised; the clamping force of the support mechanism is too large and should be outward Adjust the position of the side clamping plate in an appropriate amount.
7) Bubble or honeycomb film
In the book clip, the height of the book and the support plate are too low, and the position of the solid plate should be increased; the temperature of the glue is too low or the temperature of the glue stick is too low, and the temperature is increased after the measurement.