Acrylic and cast iron bathtubs are core products in the sanitary ware industry. Surface rolling coating is one of the most critical processes in bathtub manufacturing. Coating flatness and bubble-free finishing directly determine bathtub appearance quality, water resistance performance and overall service life. As large-sized special-shaped workpieces, bathtubs feature complex curved surfaces and variable dimensional structures across different models, bringing great challenges to consistent and high-quality coating processing.
Traditional bathtub rolling coating relies entirely on manual roller operation. Coating results are highly unstable due to inconsistent manual speed, force and operating techniques. Common defects include uneven coating thickness, surface bubbles, paint sagging and missing coating areas. Large curved surfaces, corners and recessed grooves are difficult to coat evenly, with trapped air bubbles hard to eliminate completely. This leads to poor product consistency and high rework rates. In addition, volatile paint gas creates hazardous working environments with high labor intensity. Frequent model switching further reduces production efficiency, making manual processing unable to meet the mass and multi-variety production demands of modern sanitary ware enterprises.
To solve the core pain points of traditional bathtub coating processes, Truman independently developed the intelligent bathtub surface rolling coating workstation. As professional Truman grinding equipment optimized for sanitary ware finishing, this integrated automatic rolling coating equipment supports fully automated automated coating for bathtubs of various sizes and specifications, delivering flat, bubble-free and high-quality coating surfaces.
Centered on high-precision multi-axis motion mechanisms and dedicated rolling coating actuators, the workstation achieves adaptive surface rolling coating for complex bathtub profiles. After accurate workpiece positioning and clamping, the rolling system dynamically fits curved contours and performs adaptive movement across entire bathtub surfaces. The equipment precisely controls rolling pressure, traveling speed and paint supply volume in real time. It ensures uniform coating coverage on curved surfaces, edges and grooves while fully exhausting trapped air during rolling, achieving flawless bubble-free and ultra-smooth coating finishes.
The flexible positioning system supports rapid adjustments and fast model switching for multiple bathtub sizes and styles with simple commissioning, greatly improving production flexibility. Equipped with a fully enclosed working cabin and professional waste gas collection and treatment system, the workstation effectively collects volatile paint exhaust, optimizes workshop conditions and protects operators from harmful chemical exposure.
The fully automated rolling coating process eliminates reliance on skilled coating workers. It significantly improves production efficiency while reducing common coating defects such as bubbles, sagging and uneven thickness. With lower rework and scrap rates and stable coating quality, the workstation provides the sanitary ware industry with a mature, reliable and intelligent automated coating solution for mass bathtub surface finishing.