Air-cooled Chiller for Cooling Plastic Molding Dies

Key Pain Points in Plastic Mold Cooling Operations

1. Injection/blow/extrusion molds continuously release heat. Unstable mold temperatures can lead to: product shrinkage, deformation, color difference, high internal stress, and prolonged production cycles;

2. High levels of dust and significant heat dissipation load from oil/water in the workshop;

3. 24-hour continuous operation requires stable unit operation and precise temperature control;

4. Some workshops lack cooling towers and cooling water pipes, necessitating the use of air-cooled models.

Core Structure of Air-Cooled Chiller (Suitable for Plastic Molding)

1. Air-Cooled Condenser Enlarged finned heat exchanger, hydrophilic and corrosion-resistant aluminum fins, axial high-volume cooling fan; upgradeable to 50℃ high-environment models for high-temperature workshops, preventing high-pressure shutdown in summer.

2. Refrigeration Circuit Scroll compressor (small to medium-sized models) / Semi-hermetic compressor (large tonnage), R410A/R22 refrigerant; multiple protections including high and low pressure, overload, and freeze protection.

3. Plate/Shell-and-Tube Evaporator (Mold Water Circuit Heat Exchange)

- Plate type: High heat exchange efficiency, small size, suitable for small to medium-sized injection molding machines;

- Shell-and-tube type: Scale-resistant, less prone to clogging, suitable for recycled materials and workshops with poor water quality.

4. Circulating Water Pump + Stainless Steel Water Tank

304 stainless steel insulated water tank, high-lift high-pressure water pump, suitable for multiple molds connected in parallel with long water circuits; built-in filter to block rust and plastic impurities from the molds.

5. Electrical Temperature Control System PLC digital display, adjustable water temperature 5–35℃, temperature control accuracy ±0.5℃; can be integrated with injection molding machines for start/stop linkage and fault alarm output.

Working Principle

The evaporator of the unit circulates low-temperature chilled water to the mold's water circuit, carrying away the heat generated by the molten plastic in the mold. The heated water returns to the chiller for further cooling, and the heat is directly discharged into the air through the air-cooled condenser, continuously and stably controlling the mold's constant temperature.