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Manifold Cabinet Temperature Control Box – Case Study in Injection Molding Machine Zonal Heating Industry

2024-10-17

Product Model Used: AI-208D21G1L0


Process Overview:
The Yudian AI-208 is applied in heat treatment for zonal heating in injection molding machines. This instrument has a measurement accuracy of 0.3 grade and an adjustable temperature range of 0-450°C. Its compact size (45x45mm) and 5V DC voltage signal output for controlling solid-state relays (SSRs) make it highly versatile. It also features one relay output for upper and lower limit over-temperature alarms. Each heating zone is controlled by an independent sensor, which performs individual temperature sampling and independent output control for each heating element, enhancing the flexibility of control.


Field Application:
Due to the varying load power of hot melt adhesive machines, the instruments interface includes a self-tuning function button. Self-tuning establishes a binary relationship (0 or 1). For familiar systems, known correct P, I, D, and CtI parameters can be directly input without activating the self-tuning (AT) function. Self-tuning allows the temperature controller to perform ON/OFF (bang-bang) control. After 2-3 oscillation cycles, the internal microprocessor analyzes the period, amplitude, and waveform of the oscillations to automatically calculate the P, I, D, and other control parameters. The parameter values obtained through tuning may vary depending on the setpoint. Before executing the self-tuning function, the setpoint should be adjusted to the most commonly used value or an intermediate value. For systems with good thermal insulation, such as electric furnaces, the setpoint should be set to the system's maximum value before initiating the self-tuning operation.


Problems Solved for Customers:

The use of AI fuzzy control technology for heating elements reduces fluctuations in PID adjustments, minimizes control lag, improves equipment reliability, and shortens the production and debugging time for the equipment.


Value Delivered to Customers:
The temperature control module adopts a single-channel PID temperature control design. The module itself integrates SSR voltage output for temperature control, resulting in very high integration and significantly improved control performance while greatly reducing costs. Using the AI-208D21G1L0 for temperature control allows the heating plate to automatically adjust to the preset temperature according to the set value.

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Customer Feedback:
The Yudian single-channel PID temperature control instrument enhances the flexibility of product control and the reliability of equipment. With its high level of integration, it has enabled enterprises to achieve cost reduction and efficiency improvement optimizations. It is highly commendable and deserves a thumbs-up.

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