Smart 24-Station Spin Coating Line for Water/Oil Barrier Coating of Pulp Molded Tableware

Composition of Production Line

This fully automated, inline production system consists of:

1. Automated Infeed Conveyor: Syncs with upstream molding press to automatically load unfinished pulp products.

2. 24-Station Rotary Indexing Table: The core assembly with precisely machined nests for consistent part holding and indexing.

3. Pre-Coating Treatment Zone (Optional): Integrated plasma or flame treater station to enhance coating adhesion.

4. Precision Dosing & Spin Coating Units: 24 independent sets of servo-controlled dosing pumps and high-speed spindles for precise coating application.

5. Integrated Drying/Curing Tunnel: Conveyorized tunnel with staged heating (IR/ hot air) for solvent evaporation and film curing.

6. Centralized Control Cabinet & HMI: Houses the PLC, drives, and features a touchscreen interface for complete parameter control and monitoring.

7. Outfeed & Quality Inspection Conveyor.

Product Description

This 24-Station Rotary Spin Coating Line is engineered for high-volume, precision application of internal barrier coatings on pulp-molded tableware such as plates, bowls, trays, and food containers. It utilizes a precision rotary indexing mechanism and individual spin coating stations to ensure a consistent, uniform, and pinhole-free film of coating material (e.g., PE, PLA, PFAS-free aqueous dispersions). The line integrates dosing, spinning, and curing into one continuous, automated process, significantly enhancing production efficiency, coating quality consistency, and material yield compared to manual or spray methods.

Technical Parameters

Application

• Internal Barrier Coating: For pulp-molded plates, bowls, rectangular and round food trays, clamshell containers.

• Coating Types: Applied for Polyethylene (PE), Polylactic Acid (PLA), and other bio-based or PFAS-free barrier coatings.

• Industry: Used by manufacturers of disposable eco-friendly foodservice packaging, supermarket fresh food trays, and biodegradable tableware.

Customization

This spin coating line is designed to be highly customizable to fit specific factory and product needs:

• Indexing Speed & Dwell Time: Adjustable cycle time to match coating and drying requirements of different materials.

• Part Nests & Tooling: Custom machined nests and fixtures to hold your specific product shapes securely.

• Dosing System: Customizable pump type and capacity for different coating viscosities and shot weights.

• Drying Tunnel Length & Heating: Can be customized (lengthened/shortened, different heating zones) based on coating curing profile.

• Integration: Can be customized to interface with your existing molding presses, conveyors, or packaging units.

Key Features

• Precision & Uniformity: Individual servo-controlled dosing and spinning at each station guarantee consistent coating weight and thickness across all products.

• High Efficiency & Yield: 24-station continuous operation and >90% material transfer efficiency maximize output and minimize coating waste.

• Robust & Hygienic Design: Stainless steel construction, easy to clean and maintain, suitable for food production environments.

• Smart Control & Data Logging: User-friendly HMI for recipe management, real-time monitoring of key parameters (speed, temp, dose), and fault diagnostics.

• Quick Changeover: Modular tooling design allows for relatively fast product changeovers.

Support and Services

• Project Consulting: Feasibility analysis and process solution design.

• Installation & Commissioning: Supervised on-site installation, mechanical/electrical setup, and process tuning.

• Training: Comprehensive operational, maintenance, and safety training for your engineers and operators.

• After-Sales: 18-month warranty on machinery. Lifetime technical support, readily available spare parts, and optional service contracts.

Packing and Shipping

• Packing: Major modules are disassembled and securely packed in heavy-duty, weather-protected wooden crates suitable for long-distance ocean freight.

• Shipping: Professional export packaging, with full documentation (packing list, manual, electrical drawings). Shipping terms (FOB, CIF, DAP) are negotiable.

FAQ

• Q1: What is the main advantage of spin coating over spray coating for pulp molds?

  • A: Spin coating provides far superior coating uniformity inside complex contours, uses material more efficiently (>90% transfer vs. ~50-70% for spray), and creates a pinhole-free film with less coating weight.

• Q2: Can this line handle different sizes and shapes of products?

  • A: Yes, through customization. The line is designed for quick changeovers. Different product shapes require corresponding custom machined nesting tools, which we provide.

• Q3: What is the lead time for such a line?

  • A: For a standard 24-station line, the lead time is approximately 90-120 days after order confirmation. Lead time for heavily customized configurations will be confirmed during the engineering review.

• Q4: How do you ensure the coating adheres well to the pulp surface?

  • A: We offer an integrated pre-treatment station (plasma or flame) as an optional customization. This activates the pulp surface, dramatically improving coating wetting and adhesion for a robust final product.

• Q5: Do you provide a trial or sample coating service?

  • A: Yes. We can arrange sample coating trials at our facility using your specific pulp products and coating materials to validate results before you purchase. Please contact us to discuss details.