3. Carton sticky skew
There are mainly three kinds of causes for skewing of the produced trays:
(1) The pressure groove of the indentation line is too wide and the indentation pressure is not enough, so that the extruding marks are not full, and the folds cannot be accurately folded in accordance with the indentation line.
(2) The improper adjustment of the folding transmission, the conveyance speeds of the left and right sides of the cassette are inconsistent, and the sticky mouth is skewed.
(3) The folding bar is not installed properly.
Solution: Reduce the width of the indentation line and increase the indentation pressure; adjust the folding transmission so that the feeding speeds of the left and right sides of the carton are the same; reinstall the folding bar.
4. Sticky mouth alignment is not allowed
Viscous misalignment is misalignment, and misplaced cartons are not well formed. This phenomenon is usually caused by inaccurate adjustment of the machine. Further, it is mainly due to the fact that the operator's knowledge of the box type and the folder gluer has not affected its operation level. Therefore, strengthening the training of operators, improving their operating skills and their understanding of complex box types can effectively avoid the problem of inaccurate sticking.
5. Sticky mouth overflow glue
Overfill refers to excessive adhesive flow out of the sticky mouth. This phenomenon is mainly caused by misalignment of the adhesive and excess amount of adhesive. By grinding the sticky mouth and reducing the amount of glue can effectively reduce the occurrence of overflow phenomenon.
Discuss reasonable use of automatic folder gluer
1. Paper feeding section
The following problems may occur during the feeding process of the automatic folder-folder.
(1) The aging of the rubber belt, the surface is too smooth, so that the friction coefficient decreases. In this case, replace the rubber conveyor.
(2) The paperboard is not flat and the front end is upturned. For such cardboard, it should be bent by hand, as far as possible to restore a smooth, and then put in the paper section.
(3) The height of the paper stack is too low, the pressure on the lower cardboard is not enough, the friction is not enough, and the paper should be fed in time to keep the paper pile at a certain height.
(4) The paper powder on the cassette sheet and the dusting during printing stick to the rubber conveyor belt. The more they accumulate, the lower the coefficient of friction at the time of paper feeding, resulting in difficulty in paper feeding.
In this regard, the conveyor belt should be often wiped with a wet rag to remove paper, paper dust, and dusting powder.
In addition, for the paper feeding section, you should also pay attention to the following matters:
(1) The height adjustment of the double-sheet control mechanism is to ensure that one sheet of cardboard can pass through instead of two or more sheets of cardboard; the position adjustment of the double-sheet control mechanism is to ensure that the front-end points of the cardboard are close to the double-sheet control mechanism. At the time, the cardboard's sticky edge crease line is just parallel to the rubber band.
(2) The rubber conveyor belts should be arranged as densely as possible so that the cardboard can be placed flatly on it without sagging locally. In addition, more rubber belts are also conducive to frictional paper feeding.
(3) The position of the side stop board is parallel to the feed rubber conveyor belt. The axial position of the sticky side of the board should correspond to the edge grinding position and the glue application position. When the stack is close to the sticky side, At the time, the other side of the paper stopper should have a clearance of about 1 mm from the paper stack.
2. Coating and folding sections
The problems that should be paid attention to in the gluing section and the folding section are as follows:
(1) Before applying glue, make sure that the conveying path of the sticky edge of the tray is parallel to the conveyor belt.
(2) The gap between the upper and lower rubber wheels and the amount of glue applied should be appropriate to ensure that the coating layer is thin and uniform.
(3) Match the width of the carton and rubber wheel. In the automatic gluing process, the sticky width of the carton should meet the requirements of the gluing machine. If the width is too narrow, the quality of the gluing box will be affected. If the width is too narrow, overfilling occurs. If the width is too wide, the pre-folding will be affected. In addition, the concentricity of the rubberizing wheel must be precise, and the knurling of the edge should be free from wear to ensure uniform glue application.
(4) The location of the glue should be appropriate, too far away from the crease line, and the box should be unsightly. Too close it may cause the location where the glue should not be applied to be coated with glue, resulting in difficulties in packing.
(5) The sticky mouth that has been coated with adhesive must not touch any other part of the machine. Otherwise, the glue will accumulate in this part and eventually reach the part that should not be glued.
(6) The folding part is equipped with a folding transmission, and if necessary, it is necessary to adjust the folding transmission to ensure that the sticking position is accurate.
3. Edge section
The edging is suitable for the UV glazing and the coated carton. The lacquer and the film of the adhesive part are polished and the ordinary adhesive can be used for bonding, which can save a lot of costs for the company. During the edging process, note the following.
(1) The position of the edging should be exactly the position of gluing. This position should be 1-2mm away from the crease line on the sticky mouth.
(2) The edge of the cardboard should be slightly worn on the surface of the coating, but not too deep, so as not to trace too rough, is not conducive to coating.
(3) In the edging part should be installed paper powder, paper hair collection device, because the edging paper powder. Paper hair can cause the carton surface to be uneven and affect the quality of the paste box.
Suggestions for the development of automatic folder-gluers. With the increase in the volume of packaging and printing business, especially the growth of large-volume businesses such as food, cosmetics, and pharmaceutical packaging, packaging and printing plants have higher requirements for automatic folder-gluers.
(1) Adaptability to shaped box. Most domestic automatic folder-gluers are now used to produce straight-line boxes, and their adaptability to special-shaped boxes is not strong. When encountering such jobs, most of the packaging and printing plants use manual gluing boxes, but manual gluing boxes are inefficient and of poor quality, and with the development of domestic social economy, the cost of labor is also getting higher and higher. Printing companies will increase production costs.
(2) Increase the identification and removal of waste products, remove the unqualified products in a timely manner, or identify the types of cartons and remove other products to reduce mis-assembly and misuse of the package products in the pharmaceutical industry.
(3) increase the quantitative control of the packaging function. This will not only save the packing workload, but also allow the cartons to continue drying without deformation and further improve the quality of the paste boxes.
The above discussed the process and equipment problems in the automatic gluing process and put forward constructive suggestions for the gluing machine. It is hoped that these can help the packaging printers to identify the cause of the problem. It is hoped that the folder-gluer equipment manufacturers and suppliers will be able to produce automatic folder-gluers that are more in line with current needs, and jointly promote the further development of the cassette-gluing technology. development of.
Automatic gluing box process problems and causes of failure and solution II
January 31 13:08:34, 2024
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