Slot Die Transfer Dual Mode Multifunction Coating Machine

Product Overview

This multifunction coating system combines slot die extrusion and three-roll transfer coating in one integrated production platform. It is designed for continuous or intermittent surface coating processes where coating uniformity, controlled material delivery, web stability, and repeatable dimensional accuracy are essential. The dual-method configuration gives process teams practical flexibility when working with different slurry rheologies, coating targets, and electrode development requirements.

The equipment is particularly suited to lithium-ion battery electrode manufacturing, including positive and negative electrode coating for vanadium sodium, lithium iron phosphate, lithium cobalt oxide, lithium manganate, graphite, silicon-carbon, and other battery material systems. It supports aluminum and copper foil substrates, making it relevant to battery R&D laboratories, pilot lines, advanced-materials development centers, and specialized electrode manufacturing operations.

Built around servo-controlled feeding, tension management, web-guiding functions, and double-sided hot-air drying, this unit is engineered for stable operation under demanding coating conditions. Precision roll and doctor-blade tolerances support consistent wet-film metering, while PLC and touchscreen control simplify daily setup, monitoring, and process adjustment.

Key Features

• Dual Coating Capability: This system integrates slot die extrusion and three-roll transfer coating methods. Operators can select the method that best matches slurry properties, coating requirements, and process-development objectives without changing to a separate machine platform.

• Continuous and Intermittent Operation: The equipment can switch freely between continuous coating and intermittent coating. This supports uninterrupted electrode production as well as patterned coatings with controlled coated and uncoated zones.

• Stable Servo-Driven Material Feeding: A screw pump with servo drive provides stable, pulse-free slurry delivery. Consistent feed behavior is important for maintaining coating quality when processing materials within the specified viscosity range.

• Controlled Slurry Finishing: The adhesive-pushing roller uses dual servo screw control, allowing finishing behavior to be adjusted for slurries with different viscosities. This helps operators manage coating start and end conditions with greater control.

• Precision Web Tension Management: Unwinding tension control, double-tension finishing, and web-guiding arrangements are incorporated at the unwinding section, dryer outlet, and finishing section. These functions support steady substrate travel and reduce the risk of web deviation.

• Automatic Gap Alignment: Photoelectric detection automatically tracks head and tail gaps for reverse-side alignment during double-sided intermittent coating. The arrangement supports repeatable positional control between coated areas on opposite sides of the substrate.

• Double-Sided Hot-Air Drying: The hot-air oven delivers air from both upper and lower sides of the coated web. This drying configuration is intended to provide high-quality drying performance across the coated substrate.

• Wide Three-Roll Transfer Process Window: The three-roll transfer arrangement provides a broad coating window. Combined with comma-doctor-blade metering and a precision adjustment mechanism, it supports high coating accuracy across applicable process conditions.

• Long-Life Heating Control: The heating system uses analog signal power control for high heating precision and extended service life. This approach supports controlled thermal operation in the drying stage.

• Practical Automation Interface: PLC control and touchscreen operation provide an accessible operating interface for setup and production use. A solvent recovery treatment device is available as an optional configuration.

Applications

Technical Specifications

Why Choose This Product

• Two Proven Coating Approaches in One Unit: Slot die extrusion and three-roll transfer capability allow the equipment to serve different slurry and coating-process requirements within a single platform.

• Precision at Critical Contact Surfaces: Tight runout and straightness requirements for the doctor blade and steel coating roll support controlled metering and repeatable coating performance.

• Designed for Stable Web Travel: Multiple tension-control and web-guiding positions, together with a specified +/-0.3 mm guiding deviation, help maintain substrate stability through coating and drying.

• Built for Battery Electrode Process Demands: Compatibility with aluminum and copper foil, water-based and NMP-based solvents, and a 20~85% solids-content range makes this system a practical choice for diverse electrode programs.

• Operationally Maintainable Construction: The split head-oven-tail structure, touchscreen control, routine lubrication guidance, and specified maintenance practices support disciplined long-term operation.

Contact us for a quote or a custom coating solution matched to your substrate, slurry, drying, and electrode-process requirements.

Trusted by Industry Leaders