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Scroll tinplate supplier china talks about the factors that affect the uneven coating of tinplate

  • Categories:Industry News
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  • Time of issue:2021-11-25 16:01
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(Summary description)The gap between the two ends of the roller is different. There are four sets of rollers: rubber roller and pressure coating roller, material roller and rubber roller, material roller and material roller, material roller and material roller, and the gap adjustment between the rollers often causes the tinplate to feed. The thickness of the coating varies from left to right in the direction.

Scroll tinplate supplier china talks about the factors that affect the uneven coating of tinplate

(Summary description)The gap between the two ends of the roller is different. There are four sets of rollers: rubber roller and pressure coating roller, material roller and rubber roller, material roller and material roller, material roller and material roller, and the gap adjustment between the rollers often causes the tinplate to feed. The thickness of the coating varies from left to right in the direction.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-11-25 16:01
  • Views:
Information

Do you know what factors affect the uneven coating of tinplate? Follow the editor of Scroll tinplate supplier china to have a simple understanding!
1. The gap between the two ends of the roller is different. The four sets of rollers: rubber roller and pressure coating roller, material roller and rubber roller, material roller and material roller, material roller and material roller, and the gap adjustment between the rollers is often inconsistent. The thickness of the coating varies from left to right in the direction.
Treatment method: When this kind of coating film thickness is not uniform, first use a plug gauge to check whether the gap between the two ends of the feed roller and the feed roller is consistent, and then check whether the gap between the two ends of the feed roller and the feed roller is consistent. When they are parallel to each other, adjust the gaps between the cross roller and the pressure coating roller, the coating head and the rubber roller, so that the three rollers and the two rollers are parallel to each other.


2. The paint viscosity is too high. If the coating viscosity is too viscous, the cohesion between the resin and the polymer will be large. When the cohesion is greater than the adhesion force of the resin on the surface of the tinplate, the coating on the tinplate cannot be uniformly spread, and the higher the coating machine speed, the more likely it is to cause the tinplate. The surface is coated irregularly and unevenly.
Treatment method: Appropriately reduce the viscosity of the paint, or dilute with a small surface solvent. The purpose is to reduce the cohesion between the resin and polymer, so that the paint can spread evenly on the surface of the tinplate, and slow down the coating speed, so that the staff has enough materials Time spreads evenly on the surface of the tinplate.
3. The surface of the tinplate has a high oil content. The oil film on the surface of the tinplate is mainly to protect the tinplate from being oxidized and corroded before coating. The thicker the oil film, the worse the wettability of the coating resin polymer on the surface of the tinplate, and the materials cannot be uniformly attached to the surface of the tinplate.
Treatment method: When the oil content of the tinplate is high, the viscosity of the coating can be appropriately reduced. For tinplate with too high oil content, the only way to remove oil is through high-temperature baking.
The above is the introduction of the editor of Scroll tinplate supplier china: introduction to the factors of uneven tinplate coating.

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