The phenomenon and causes of poor gaps in the heat-dissipating patch coating machine.
1. Tail dragging
(1) Materials: slurry materials, viscosity, solid content, slurry (external) tension
(2) Equipment aspects: distance between the coating and the rear roller. The speed of the applicator roller when the rear roller pops out, the diameter of the rear roller. Appearance of the hundred rollers. Deformation of the hundred rollers. The rear roller is parallel to the coating roller, and the rear roller is not parallel to the front roller of the oven. Working tension.
(3) Operational aspects: adjustment parameters for the head and tail
2. The head and tail are not parallel
(1) Data aspect: uneven gravity on both sides of the substrate.
(2) Equipment side: the horizontal plane of the rear roller and the coating roller is not parallel. The rear roller pops out unevenly left and right. The appearance concentricity of the back roller, the back roller and the traction roller are not parallel, and the horizontal occurrence changes.
(3) Tension adjustment roller adjustment state
3. The front and back are misaligned
(1) Operational aspects: consistency of the first gap. Operating parameters not adjusted. Eyes are blocked. The roller discharge roller forgot the clamp.
(2) Equipment aspect: large rear tension on both sides. Small front tension.
4. The blank space decreases when starting from the center, and the last 3 to 4 sheets are incorrect.
Equipment aspect: initial tension not allowed to start, the first one has no memory function, the foil slides 2-3 mm after starting. Tension is opened first when starting, the back roller does not rotate, and the oil cloth head has no clamp or does not clamp.
5. The last strip is parallel to the drag boat.
Operational aspect: distance of the hundred rollers (top surface trailer, second surface does not drag the tail); slowly open the back roller when shutting down.
6. The head is thick and the tail is thin or the head is thin and the tail is thick.
Operation: head and tail parameters are not coordinated.
7. There is action but no effect.
(1) Information aspect: the two ends of the foil are loose and chaotic.
(2) Equipment aspect: small foil tension momentarily detaches from the roller.
8. Large blank phenomenon on both sides.
Naked eye feels nothing, the first gap is very strange, the naked eye is blocked.
The length of the coating section changes, the distance is unstable.
1. Large segment length change (*shortened*) small distance change (narrowed)
Causes of defects
1) The hundred rollers and the appearance of the hundred rollers are not clean.
2) The distance between the rear roller and the roller is too small, too tight.
3) Inconsistent front and rear tension, the roll is larger than the roll.
Solutions
1) Clean the rollers.
2) Adjust the inclined block to a fixed direction.
3) Adjust reference setting parameters.
2. Large segment length change (*lengthened*) large distance change (widened)
Causes of defects
If the head length of the magnetic pole and the head length of the next part change greatly (the smaller), the tail between the two segments of the magnetic pole will become smaller, thus judging whether the solenoid valve (controlling roller movement) is sensitive.
3. Segment length changes greatly (*lengthened*) distance changes greatly (widened)
Causes of defects
1) The hundred rollers and the appearance of the hundred rollers are not clean.
2) No clamping roller, can be clamped or uncontrollable.
3) Inconsistent front and rear tension, the roll is larger than the roll.
Solutions
1) Clean the rollers.
2) Add clamping roller.
3) Adjust reference setting parameters.
Causes and countermeasures for the wrinkling phenomenon of the electrode plate during the operation of the heat-dissipating patch coating machine.
1. Overall equipment accuracy is low, the center of each component deviates from the overall mechanical design centerline, or has an angle with the design center, the foil may bend severely, requiring adjustment of the equipment center. 2. The distribution of parallelism between rollers can form wrinkles in the foil strip, so it is necessary to carefully observe and adjust whether the vertical projection surface is parallel and whether the horizontal plane is parallel.
3. The roughness of the roller surface is too large, the roller surface cannot be lubricated, and obvious processing textures will also cause the foil to wrinkle, so the factory should be asked to replace it.
4. Foreign objects are stuck to the back roller and each roller or too much water is used. Frequently observe after wiping with isopropanol, discover and clean in time, and be careful not to damage the roller surface.
5. Poor bonding of the foil tape, when the tension on both sides of the foil tape is unbalanced, the electrode plate will bend. First, adjust the tension adjustment roller under the coating head and adjust the adjustment roller back to its original state until the foil tape gradually flattens.
6. When the back roller and the coating roller are close to touching, and the gaps at both ends are staggered, the electrode plate will bend. According to dopo online, whether brushing the first or still the second surface, the gap must be carefully adjusted. First, appropriately expand the gap, then slowly reduce it, while investigating the dial gauge scale when the coating roller contacts the foil, and then reduce the gap to 0.03 mm.
7. Abnormal calibration systems can also cause extreme wrinkles, confirming whether the three calibration systems before and after are in automatic condition. According to reports from dopo online, the lengths of the two sides of the foil are inconsistent, the sickle bends too much, and wrinkles in the electrode plate also appear, which can only be compensated beyond replacement of the foil.
8. When the tension of the electrode plate is too large, the electrode plate will wrinkle. It is necessary to confirm whether the tension setting is reasonable. Please take another look at each electric roller. Whether the rolling of the roll roller is sensitive, and deal with the insensitive roller in time.
9. When the schedule of the hundred rollers is staggered, the electrode plates will bend. The machine personnel need to check, confirm, and adjust. After unfolding the white roll and the roller, when the gap on both sides is 1 millimeter (check with a dial gauge), start testing the paint, and lock the nut when the trailer passes inspection. (Albert Einstein, Beijing, Shanghai, Guangzhou, Shenzhen).
10. During the reuse process of the rubber roller on the outer side of the rear roller, periodic elastic deformation will occur. When a certain degree of deformation residue appears, wrinkles will also occur. At this time, a new product needs to be replaced.
11. According to reports from dopo online, the loosening of certain roller fixing screws has led to the destruction of the parallel state of each roller, resulting in the appearance of wrinkles. As long as timely adjustments and tightening are made, it can be resolved.
The phenomenon of interruption of the electrode plate during the operation of the heat-dissipating patch coating machine.
1. The connection belt is not correct, increasing extra tension, causing the foil to break in thin areas;
2. Sampling can cause damage, greatly reducing the tensile strength of the foil.
3. High tension, instability, and sudden changes;
4. Sudden changes in air volume, severely imbalanced diffusion;
5. Sudden changes in temperature have a significant impact on aluminum foil strength;
6. Poor quality of the foil, extreme differences;
7. Severe deviation of the foil, cut off by the edge of the roller.
Other fault phenomena
1. There are obvious bulges and scratches on the electrode plate, scattered longitudinally.
1) The blade of the scraper roller has notches or is stuck with foreign objects.
2) The coating roller is not very usable. When painting gaps, the empty spaces on the roller will not be scratched, and when reapplied to the substrate, obvious marks will be left on the substrate. 3) The parallelism of the axis of the scraper equipment and the axis of the coating roller decreases, the pressure of the blade on the coating roller is inconsistent, the blade shape is inappropriate, and the blade elasticity is low, etc.
2. There are obvious cracks on the electrode plate.
The drying speed is too fast, the oven temperature is too high, and the baking time is too long.
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