Sinking roller is one of the key equipment in continuous hot-dip galvanizing production lines such as galvanizing and aluminum zinc plating. It is mainly used to guide the strip steel into the zinc pot and control the immersion angle and depth of the strip steel in the zinc solution. The sinking roller is usually installed at the bottom of the zinc pot, ensuring a uniform metal layer coating on the surface of the strip steel by coming into contact with the zinc liquid. The material, design, and manufacturing process directly affect the quality and production efficiency of the coating.

Advantages and Features

High temperature and corrosion resistance

Sinking rollers are usually made of high-temperature and corrosion-resistant materials (such as ceramics, stainless steel, or special alloys), which can work stably in high-temperature zinc liquid for a long time and extend their service life.

Surface treatment technology

The surface of the sinking roller has undergone special treatment (such as spraying ceramic coating or plating) to reduce the adhesion of zinc liquid to the roller surface, reduce maintenance frequency, and improve production efficiency.

High precision design

The size and shape of the sinking roller are precisely designed to ensure that the immersion angle and depth of the strip steel in the zinc solution are consistent, thereby ensuring the uniformity of the coating and product quality.

High wear resistance

The sinking roller comes into contact with the strip steel during high-speed operation and needs to have excellent wear resistance to reduce wear and deformation and extend its service life.

easy to maintain

The sinking roller design considers the convenience of disassembly and replacement, reduces downtime, and improves the operational efficiency of the production line.

Application scenarios

Galvanizing production line

The sinking roller is the core component of the hot-dip galvanizing production line, used to guide the strip steel into the zinc pot, ensuring that the zinc layer adheres evenly to the surface of the strip steel.

Aluminum zinc production line

In the aluminum zinc production line, the sinking roller also plays an important role in controlling the immersion depth and angle of the strip steel in the aluminum zinc liquid.

Tin plating production line

In the tin plating process, the sinking roller is used to guide the strip steel into the tin solution, ensuring even distribution of the tin layer.

Other metal coating production lines

Sinking rollers can also be used in other metal plating production lines, such as chrome plating, nickel plating, etc., to meet different process requirements.

Instructions for Use

Installation and Debugging

Before installing the sinking roller, ensure that the inside of the zinc pot is clean and free of impurities to avoid affecting the working performance of the sinking roller.

During installation, ensure that the sinking roller is aligned with the running direction of the strip steel to avoid deviation or misalignment.

During debugging, check whether the rotation of the sinking roller is smooth and ensure that there is no jamming or abnormal vibration.

Precautions for operation

Before starting the production line, check the surface of the sinking roller for any damage or foreign objects to ensure that it is in good condition.

Control the running speed and immersion depth of the strip steel to avoid exacerbating the wear of the sinking roller due to excessive speed or immersion depth.

Regularly monitor the temperature and vibration of the sinking roller, and promptly handle any abnormalities found.

Maintenance and Care

Regularly clean the zinc slag and impurities on the surface of the sinking roller to prevent them from affecting the quality of the coating.

Check the wear of the sinking roller and replace severely worn components in a timely manner.

Regularly maintain the bearings and lubrication system of the sinking roller to ensure its smooth operation.

Common problems and solutions

Zinc slag adheres to the surface of the sinking roller

Reason: The temperature of the zinc liquid is too high or the surface treatment of the sinking roller is improper.

Solution: Adjust the temperature of the zinc solution to ensure it is within the process range; Regularly clean the surface of the sinking roller and reapply protective coating if necessary.

The sinking roller is severely worn

Reason: The strip steel runs too fast or the sinking roller material is not wear-resistant.

Solution: Reduce the running speed of the strip steel and use materials with stronger wear resistance to manufacture sinking rollers.

Sinking roller vibration or abnormal noise

Reason: Bearing damage or improper installation.

Solution: Check and replace the damaged bearings, and readjust the installation position of the sinking roller.

Uneven coating

Reason: Inconsistent immersion depth or uneven surface of the sinking roller.

Solution: Adjust the immersion depth of the sinking roller to ensure smooth operation of the strip steel; If necessary, replace the sinking roller with a flat surface.

The sinking roller has a short service life

Reason: Improper material selection or untimely maintenance.

Solution: Use high-quality materials to manufacture sinking rollers and strengthen daily maintenance and upkeep.