Water Bath Extrusion Continuous Coating Machine

Product Overview

This water bath extrusion continuous coating machine is engineered for controlled, repeatable coating of metal foil substrates used in battery electrode development and advanced materials processing. Its extrusion coating head, precision adjustment mechanism, constant-tension web transport, and PLC-based operation work together to produce accurate wet-film application with dependable dimensional control. The equipment combines coating, dual liquid-bath processing, hot-air drying, and rewinding in one continuous production path.

The system is suited to lithium-ion battery electrode research, pilot-line validation, slurry formulation studies, current-collector processing, and other roll-to-roll coating tasks requiring controlled film quality. It accommodates aluminum and copper foils, oil-based NMP solvent systems, and water-based H2O/NMP solvent systems. Its broad slurry-viscosity and solids-content capability supports process development across a range of electrode formulations.

Designed for demanding laboratory and pilot manufacturing environments, this unit uses robust steel-frame roller mounting, SUS304 stainless-steel process sections, hard-chrome-plated coating rollers, and independent heating control. Closed-loop tension handling, ultrasonic web guiding, high-precision mechanical components, and protected oven temperature management help maintain consistent operation through extended coating runs.

Key Features

• Precision Extrusion Coating Head: The extrusion head is finished to Ra0.4 with straightness of <= +/-1.5 um. Its precision micro-adjustment mechanism supports controlled coating geometry and helps achieve coating accuracy of +/-3 um.

• Stable Web Tension Management: Automatic constant-tension control is applied at unwinding and winding to keep foil travel stable. Independent winding-tension control and a 3-inch pneumatic expanding shaft help protect thin aluminum and copper substrates during continuous processing.

• Ultrasonic Web Guiding: An ultrasonic automatic correction device provides web-guiding deviation control of +/-0.3 mm. This helps maintain stable alignment as the substrate moves through the coating, liquid-bath, drying, and rewinding stages.

• Dual Water-Bath Configuration: Two liquid baths can be configured with two different liquids for process flexibility. Each SUS304 stainless-steel bath has dedicated drainage and overflow provisions, plus uniformly arranged electric heating elements for even thermal exposure.

• Dual-Sided Hot-Air Drying: The drying section directs air to both upper and lower substrate surfaces. Its double-layer independent heating arrangement, recirculating hot-air structure, and purpose-molded nozzle slots support effective solvent removal across the coated web.

• Independent Oven Zone Protection: Each oven section is independently controlled for normal operating temperature and over-temperature monitoring. In an over-temperature condition, the protection system disconnects the main heating power to support safer, more reliable thermal processing.

• High-Accuracy Heating Control: Analog-signal power control is used for heating, providing bath heating accuracy of +/-1 C and oven heating accuracy of +/-0.5 C. The approach is designed for precise heat delivery and long service life of the heating system.

• Robust Roll and Frame Construction: Rollers are mounted on a rigid steel frame, aluminum idler rollers receive an oxidized surface finish, and the steel coating roller is hard-chrome plated. The coating roller specification controls radial runout, roughness, and straightness for dependable coating consistency.

• PLC and Dual Touchscreen Operation: A PLC and touchscreens at both the head and tail of the line simplify operation across the process path. When a fault occurs, the touchscreen displays the applicable corrective screen to speed diagnosis and recovery.

• Integrated Slitting and Rewinding: The single-arm rewind arrangement includes automatic guiding, automatic constant tension, a pneumatic expanding shaft, and a slitting mechanism. This supports orderly collection and downstream handling of processed foil.

Applications

Technical Specifications

Why Choose This Product

• Built for controlled pilot processing: The equipment integrates stable tension control, ultrasonic alignment correction, precision extrusion coating, liquid-bath treatment, drying, and rewinding into a process path suited to repeatable technical work.

• Precision where it affects electrode quality: Controlled coating accuracy, coating-weight accuracy, dimensional accuracy, low-runout roller specification, and tightly managed temperature performance provide a strong basis for process consistency.

• Durable industrial materials: SUS304 stainless-steel baths, oven components, and fans, together with hard-chrome-plated steel coating rollers and rigid steel-frame construction, are selected for sustained operating reliability.

• Protection and operational visibility: Independent oven controls, over-temperature protection, touchscreen fault displays, and PLC control support disciplined operation and prompt troubleshooting.

• Adaptable to development requirements: The supported foil, slurry, solvent, dry-thickness, and solids-content ranges enable technical teams to configure the system around established and emerging electrode processes.

Contact KINTEK for a quote or a custom solution matched to your foil format, slurry system, liquid-bath process, and laboratory or pilot-line requirements.

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