When dealing with complex structures, the electronic door lock electrostatic coating line first relies on its flexible nozzle design. For complex parts such as grooves, holes, corners, etc. on the door lock, the coating line is equipped with nozzles of different angles and specifications. These nozzles can penetrate into narrow spaces to ensure uniform coating. For example, there are often multiple small holes around the lock core of the door lock. The dedicated fine-diameter nozzle can be aimed at these areas for precise spraying to avoid missing paint due to structural obstruction. At the same time, the position of the nozzle can be adjusted at multiple angles through program presets. Whether the surface of the door lock is curved or flat, the appropriate spraying angle can be found to ensure that every part of the complex structure can be exposed to the paint.
The principle of electrostatic adsorption provides technical support for the coating of complex structures. The electronic door lock electrostatic coating line uses an electrostatic field to charge the paint particles, and the door lock itself is grounded as a conductor. The charged paint will be adsorbed to the surface of the door lock under the action of the electric field force, including those hidden parts that are difficult to spray directly. For example, there is a gap at the connection between the door lock handle and the base, and conventional spraying may not be able to penetrate deeply, but electrostatic adsorption can allow paint particles to "actively" adhere to the inside of the gap to form a complete coating. This feature reduces the blind area of coating caused by complex structures and ensures the continuity and integrity of the coating.
The segmented coating process allows the electronic door lock electrostatic coating line to treat different complex parts in a targeted manner. The coating line divides the coating process of the door lock into multiple stages, each of which focuses on spraying a specific structural area. For example, the flat part of the door lock is first sprayed with a basic coating, and then a special nozzle is started to process the grooves and corners, and finally the overall spraying is used to cover the details that may be missed. This staged processing method can adjust the spraying parameters (such as paint flow rate, nozzle distance) according to the complexity of different parts, avoid excessive or insufficient paint in some areas due to one-time spraying, and allow each part of the complex structure to obtain a suitable coating thickness.
The intelligent control system can adjust the spraying parameters in real time to adapt to the changes in the complex structure of the door lock. The system uses sensors to scan the three-dimensional structure of the door lock, build a digital model, automatically plan the spraying path based on the model, and monitor the coating coverage in real time during the spraying process. If a complex part (such as a pattern engraving) is found to be insufficiently covered with paint, the system will immediately adjust the movement speed of the nozzle and the amount of paint sprayed to perform local enhanced spraying. This dynamic adjustment capability ensures that even complex structures with irregular shapes can obtain a uniform coating, avoiding coating defects caused by misjudgment during manual operation.
For complex door locks with moving parts, the fixture design of the coating line can assist in completing the full coating. The fixture can fix the door lock and slowly rotate or flip it during the coating process, exposing the originally obscured parts to the nozzle. For example, the rotatable handle of the door lock may block the inner surface when it is fixed, and the fixture drives the handle to rotate slowly, allowing the nozzle to spray each surface during the rotation process. This dynamic fixing method, combined with electrostatic adsorption, solves the coating problem at the connection between the moving part and the fixed part, ensuring that all surfaces of the complex structure can be evenly covered with paint.
The optimized atomization effect of the paint also enhances the coating ability of complex structures. The electronic door lock electrostatic coating line uses high-pressure atomization technology to convert the paint into fine and uniform particles, which can more easily enter narrow gaps or complex textures. Compared with the large-particle paint of traditional spraying, the atomized small-particle paint has better fluidity and can penetrate into the fine structure of the door lock under the action of static electricity, such as the inside of the keyhole and the gap of the password key. This fine atomization process allows the paint to adapt to the size requirements of complex structures and avoid blockage or incomplete coverage caused by excessively large particles.
The subsequent curing process further ensures the stability of the coating of complex structures. Even if the complex parts are covered during the spraying stage, the coating may still crack or fall off if the curing process is not done properly. The curing oven of the electronic door lock electrostatic coating line adopts a uniform heating design, which allows all parts of the door lock (including hidden complex structures) to reach the curing temperature at the same time, ensuring that the coating remains stable during the shrinking process. For example, the deep-hole internal coating and surface coating of a door lock can be cured simultaneously to avoid coating peeling due to temperature differences, allowing the coating of a complex structure to not only have comprehensive coverage but also maintain good adhesion for a long time.
