Chillers & Towers: 4 types of cooling system in injection molding

Cooling System: A Critical Factor in Injection Molding

In industrial processes such as injection molding, extrusion, and blow molding, the cooling system is one of the most critical factors affecting production efficiency and product quality. When cooling is fast and water temperature is stable, production lines can run at full speed with consistent output quality.

Yet industrial cooling equipment comes in many forms, each with different operating principles, suitable applications, and energy consumption profiles. This guide provides a complete overview of the main types of industrial cooling equipment to help you make the most informed decision for your facility.

What’s the Core Mission of an Industrial Cooling System?

Regardless of the process involved, every cooling system has one fundamental job:

Efficiently and consistently remove heat generated by the process, keeping equipment and products within their optimal temperature range.

When cooling capacity is insufficient, the consequences typically include:

• Longer cycle times and reduced daily output
• Dimensional inconsistency in finished products, leading to higher defect rates
• Equipment overheating, shortening machine service life
• Increased energy consumption and rising production costs

Selecting the right cooling equipment is one of the most impactful steps toward improving overall manufacturing performance.

4 Main Types of Industrial Cooling Systems

To achieve the optimal balance between production speed and product quality, facilities need the right cooling technology. While the industrial cooling system shares the same ultimate goal of removing excess heat from production lines, each option differs in design, efficiency, installation requirements, and water usage.

In injection molding, four primary types of cooling systems are commonly used:

• Air-Cooled Chillers
• Water-Cooled Chillers
• Open-Type Cooling Towers
• Closed-Type Stainless Steel Cooling Towers (SUS Close-Type)

Each option offers distinct advantages depending on cooling load, available water supply, installation conditions, and production requirements.

The following sections explain each system’s key benefits and the applications it is best suited for.

Air-Cooled Chiller

The air-cooled chiller is the most widely used cooling solution in small-to-medium manufacturing facilities. It dissipates heat from the refrigeration cycle directly into the surrounding air using built-in fans, requiring no external cooling water supply. This makes installation straightforward and highly flexible.

An Air-Cooled Chiller may be right for you if...

• Your facility has no cooling tower or water circuit infrastructure
• You need installation flexibility or the ability to relocate equipment easily
• Your cooling load falls within the small-to-medium capacity range
• The unit can be placed in a well-ventilated area

Flying Tiger offers both standard and inverter-driven air-cooled chillers. The inverter type automatically adjusts compressor speed based on real-time cooling demand, achieving energy savings of 30–50% compared to fixed-speed models

Water-Cooled Chiller

Water-cooled chillers use a cooling water circuit — typically supplied by a cooling tower — to remove heat from the refrigeration system. This approach delivers higher overall cooling efficiency than air-cooled models and is particularly well-suited to high-capacity or continuous-duty applications.

A Water-Cooled Chiller may be right for you if...

• Your facility already has a cooling tower or water piping infrastructure
• Your production line has large or continuous cooling demands
• You are targeting lower operating energy costs and longer equipment lifespan
• The chiller unit will be installed indoors, away from open-air heat dissipation

Flying Tiger’s inverter water-cooled chillers automatically reduce power consumption during partial-load operation — particularly beneficial for factories where cooling demand varies significantly by season or shift schedule.

Cooling Tower (Open Type)

A cooling tower is not a refrigeration device. Instead, it lowers water temperature through evaporative cooling — releasing heat into the atmosphere as water evaporates — before recirculating the cooled water back to the process. Cooling towers are commonly paired with water-cooled chillers to handle heat rejection on the condenser side, though some facilities use them independently to provide ambient-temperature cooling water.

Cooling Towers are used in two main ways:

• Paired with a Water-Cooled Chiller: The cooling tower rejects heat from the chiller’s condenser — an essential component of a complete water-cooled system
• Standalone Process Cooling Water Supply: Provides ambient-temperature water directly to production equipment, suitable for processes with lower temperature precision requirements.

  

Closed-Type Stainless Steel Cooling Tower (SUS Close-Type)

Unlike open cooling towers, the closed-type (or dry cooler) design keeps process water completely isolated from the outside air. Heat is transferred indirectly through a coil, so the cooling water never contacts the atmosphere.

Key advantages of the closed-type design:

Flying Tiger’s SUS Close-Type Cooling Tower uses stainless steel construction for enhanced corrosion resistance and durability in demanding industrial environments.

Quick Comparison: Which Cooling Systems Fit Your Needs?

Selecting the ideal thermal management setup depends heavily on your factory's layout, budget, and water quality requirements. To help you evaluate your options at a glance and make the right strategic decision for your facility, here is a quick overview comparing the four primary system types

Why Are Inverter Chillers Increasingly the Smart Choice?

Conventional fixed-speed chillers are designed to operate at full capacity — even when actual cooling demand is well below the maximum. In real-world production environments, cooling loads fluctuate constantly based on product type, shift schedules, and seasonal temperatures. Running a fixed-speed compressor at full power regardless of load results in significant energy waste.

Inverter chillers solve this problem by dynamically matching compressor speed to actual demand:

• Lower speed during reduced-load periods — directly cutting electricity consumption
• Smoother startup reduces mechanical stress, extending compressor service life
• More precise and stable chilled water temperature, reducing process variability

Flying Tiger’s inverter air-cooled and water-cooled chillers deliver 30–50% energy savings in typical operating conditions. For facilities running continuous shifts, the return on investment from energy cost reduction alone is often realized within a short timeframe.

How to Choose the Right Cooling Equipment?

When evaluating industrial cooling solutions, we recommend working through the following questions:

Determine Your Process Heat Load

• Calculate your facility's exact process heat load in kcal/hr or Tons of Refrigeration (RT).
• This metric defines the absolute minimum cooling capacity your system must handle to prevent production bottlenecks and ensure consistent product quality.

Assess your existing infrastructure

• If a cooling tower and water piping are already in place, a water-cooled chiller is the natural fit.
• If not, an air-cooled chiller offers the fastest path to deployment.

Consider your duty cycle and load variability

• For long-duration, high-load operation, water-cooled systems offer better efficiency.
• For fluctuating loads, inverter models deliver the best energy performance.

Evaluate water quality requirements

• If your process is sensitive to water cleanliness or contamination, a closed-type cooling tower eliminates the risk of airborne particulates entering the cooling circuit.

Factor in energy cost targets

• If electricity is a major operating expense, the long-term savings from an inverter chiller should be weighed against the initial investment.

FAQs for Cooling System in Injection molding

Optimizing the cooling process is essential for maximizing output and ensuring zero-defect production in plastics manufacturing. Below are the 4 most frequently asked questions regarding injection molding cooling systems, along with professional insights to help you maintain peak efficiency.

Conclusion: Optimizing Your Cooling System in Injection molding with Flying Tiger

Selecting the right cooling system in injection molding is more than just an equipment upgrade — it is a strategic investment that directly drives your production speed, reduces defect rates, and cuts energy costs. From high-efficiency inverter chillers to robust SUS closed-type cooling towers, achieving the perfect thermal balance requires specialized engineering expertise.

If you’re unsure where to start, Flying Tiger’s engineering team is ready to help. We’ll analyze your process requirements and recommend the most suitable equipment configuration.

Not Sure Which Cooling Solution Is Right for You? Check out Flying Tiger’s industrial water/air chillers models or Contact Us directly for a free assessment and quote!