How to Select the Right Industrial Chiller for an Injection Molding Plant

Stable mold temperature control is the key to high yield in injection molding production. When purchasing industrial chillers, many injection molding factories only focus on price and horsepower. This often results in insufficient cooling capacity, unstable temperature control and high power consumption, which bring problems such as sink marks, deformation, bubbles, dimensional deviation and longer production cycles. Combined with actual working conditions of the injection molding industry, this article shares the core points for injection molding factories to select industrial chillers, helping you pick suitable cooling equipment for your workshop.

1. Calculate cooling capacity first to match the workshop heat load

Cooling capacity is the primary indicator for chiller selection. Do not make rough estimates merely based on the number of injection molding machines. Heat sources in injection molding include heat from plastic melting, mold heat dissipation, heat generated by barrels and auxiliary equipment, etc. If the chiller has insufficient cooling capacity, the mold temperature cannot reach the target and the yield will drop. If the selected capacity is too large, the procurement cost rises, and frequent start-stop operation of the unit leads to serious energy waste.

Selection should take multiple factors into consideration comprehensively: tonnage of injection molding machines, number of mold cavities, product material, shot weight, target mold temperature and the number of machines running simultaneously. Professional manufacturers can provide free heat load calculation according to workshop conditions and offer accurate solutions to avoid over-sizing or under-sizing.

2. Choose air-cooled or water-cooled chiller according to workshop conditions

There are two main types of chillers for injection molding: air-cooled chillers and water-cooled chillers.

• Air-cooled chiller: Equipped with built-in heat dissipation fins. No cooling tower or cooling water tank is required. It features easy installation, small footprint and only needs water and power connection. It is suitable for small and medium-sized injection molding workshops with limited space or no conditions to install a cooling tower. Modular scroll air-cooled chillers are the most widely used type for injection molding factories at present.

• Water-cooled chiller: It must work with a cooling tower. It delivers higher heat exchange efficiency and saves more electricity during long-term continuous operation. It is ideal for large injection molding parks, factories running 24-hour full-capacity production and workshops with complete circulating water systems.

  
  

  

3. Clarify temperature control requirements to match product processes

Different plastic materials and finished products have different requirements for water temperature stability. For common general plastics such as PP and PE, temperature control accuracy of ±1~2℃ can meet production demands. Thin-wall parts, optical components and precision plastic accessories with strict dimensional requirements need high-precision temperature control of ±0.5℃.

Fluctuating water temperature directly causes inconsistent quality within the same batch and increases the defect rate. Before purchase, be sure to inform the supplier of your product types and confirm whether the chiller’s temperature control accuracy meets your requirements.

4. Attach importance to continuous operation stability and after-sales support

Most injection molding workshops operate two shifts or run nonstop for 24 hours. Chillers are equipment designed for continuous operation. The quality of compressors, evaporators and electronic control components directly affects the failure rate and service life of the unit.

Apart from hardware quality, fast after-sales response is also critical. Once the chiller breaks down, the whole injection molding line will be affected and cause huge losses from production shutdown. Prioritize reliable original manufacturers with stable spare parts supply and quick maintenance service.

5. Take energy saving into account for long-term production

Chillers are one of the major power consumers in injection molding workshops. Variable-frequency chillers can automatically adjust output power according to real-time heat load and reduce energy consumption under low load, which can cut considerable electricity costs in the long run. Energy-saving models bring more obvious benefits for factories running at full capacity all year round.

Conclusion

The most suitable chiller for your workshop is neither the cheapest nor the largest one. You need to balance production scale, product process, site conditions and budget.

If you are unsure about model selection, send us the information of your injection molding machines and cooling requirements. We can customize cooling solutions for you. Direct supply from the manufacturer, various chillers for injection molding are available in stock.

Kelly | Jianlong (Shenzhen) Industrial Co., Ltd. 

WhatsApp: +8618988729072

 Email: heyuoqing@gmail.com 

Website: https://www.machinejianl.com/