Case Background:
Paper-making machines are essential equipment used to convert plant fibers—such as wood, grass, or recycled paper—into paper through processes including pulping, deinking, sheet forming, pressing, drying, and rolling. Initially, raw materials undergo pulping and deinking to separate fibers. The resulting pulp suspension is then shaped via a wire mesh, mechanically pressed to remove excess moisture, and finally dried and rolled into paper reels. The process involves not only complex mechanical operations but also requires precise control of critical parameters such as moisture, temperature, and pressure to ensure paper quality and production efficiency. Paper-making machines play a foundational role in various industries such as printing, packaging, and stationery.

Solution:

• Main Controller: Siemens PLC

• Applicable Process: Pulp Separation and Deinking

• Project I/O Configuration: 1MTC-1110 + 4MTC-210H-A + 4*MTC-310H-A

• Annual Usage: 300,000 sets

This solution integrates Siemens S7-1200 PLC with Decowell’s MTC series valve island modules, forming a high-performance and easily expandable automation control system for paper-making machines. The system receives input from a variety of photoelectric sensors, enabling real-time monitoring of key stages in pulp handling and paper forming. Based on sensor data, the PLC precisely controls essential equipment such as pulpers, motors, forming screens, and dryers, ensuring optimal process performance and product consistency.

Thanks to the modular design, the system greatly reduces wiring complexity and provides flexible interfaces for easy expansion of solenoid valves. This intelligent and scalable control system significantly enhances production efficiency and paper quality while reducing energy consumption and manual intervention.

Application Advantages:

• Reduced wiring, streamlined on-site installation

• Easy solenoid valve expansion for future upgrades

• Real-time monitoring and precision control ensure high paper yield and uniform quality

• Stable and reliable system adaptable to various paper-making processes