How to Choose the Right Water Chiller for Plastic Injection Molding

How to Choose the Right Water Chiller for Plastic Injection Molding

Selecting the correct water chiller is one of the most critical decisions in a plastic manufacturing facility. An undersized chiller will struggle to maintain temperature, leading to defective products. An oversized unit means wasted energy and higher operating costs.

Step 1: Calculate the Heat Load

Heat Load (kcal/h) = Material Weight (kg/h) x Specific Heat (kcal/kgC) x Temperature Difference (C)

For most plastics, specific heat ranges from 0.3 to 0.55 kcal/kgC. Always add a 20-30% safety margin.

Step 2: Determine Flow Rate

Cooling water flow rate for medium-sized injection molding typically ranges from 50 to 200 L/min.

Step 3: Air-Cooled vs Water-Cooled

Air-cooled chillers: ideal for small-medium operations, easier to install.

Water-cooled chillers: higher efficiency, better for large-scale facilities.

Step 4: Temperature Stability

PID controllers maintaining +/- 0.1-1C ensure consistent quality in precision molding.

Why Zillion?

Zillion offers 5HP-50HP industrial water chillers with scroll compressors and high-efficiency evaporators for plastic manufacturing worldwide.