Case Study

Engineering the THC‑D‑24 Hot Oil Temperature Control Unit for Plastic Processing Manufacturer from Michigan

Engineering the THC‑D‑24 Hot Oil Temperature Control Unit for Plastic Processing Manufacturer from Michigan

Every industrial project begins with a challenge, and this one started when a plastics processing manufacturer from Michigan contacted us through our website. Their molding operation required precise, high‑temperature control, but their existing system struggled to maintain stable temperatures during long production cycles. Inconsistent heating was causing part defects, extended cycle times, and unnecessary downtime.

They needed a reliable hot oil temperature control unit capable of delivering consistent thermal performance at elevated temperatures. After reviewing their process requirements, our engineering team recommended the THC‑D‑24 model, a robust hot oil TCU designed for demanding applications requiring stable temperatures up to 300°C.

This initial consultation marked the beginning of a collaborative engineering journey to deliver a high‑performance thermal oil heater tailored to their production needs.

MetalPress Machinery is pioneer in manufacturing  temperature controle units. In addition to hot oil TCU, we have provide high-flow water TCUs ideal for large molds, multi‑zone tooling, and high‑demand industrial processes. We also provide water channel cleaning units that deliver essential maintenance for mold cooling systems.

Understanding Hot Oil Temperature Control Units

Before diving into the engineering process, it’s important to understand the role of hot oil temperature control units in modern manufacturing.

What Is a Hot Oil Temperature Control Unit?

A hot oil temperature control unit—also known as a hot oil TCU, thermal oil heater, or high‑temperature process heating system—is designed to heat and circulate thermal oil through molds, dies, tanks, or process equipment. Unlike water‑based systems, hot oil TCUs can reach significantly higher temperatures without pressurization, making them ideal for high‑temperature industrial processes.

Where Hot Oil TCUs Are Used

These systems are essential in:

  • Plastics injection molding

  • Extrusion and blow molding

  • Die casting

  • Chemical processing

  • Food and pharmaceutical heating

  • Oil and gas equipment conditioning

Any process requiring stable, high‑temperature control benefits from a hot oil temperature control unit like the THC‑D‑24.

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    Introducing the THC‑D‑24 Hot Oil Temperature Control Unit

    The THC‑D‑24 is a high‑performance hot oil TCU engineered for precision, reliability, and continuous operation. Its specifications make it ideal for demanding thermal applications.

    Key Specifications of the THC‑D‑24

    • Heating Capacity: 24 kW

    • Maximum Operating Temperature: 300°C

    • Pump Type: High‑flow, high‑temperature circulation pump

    • Pump Flow Rate: Engineered for stable oil movement through long and complex channels

    • Reservoir: Integrated thermal expansion tank

    • Construction: Stainless‑steel piping and high‑temperature fittings

    • Controls: Digital temperature controller with PID logic

    • Safety Features:

      • Over‑temperature protection

      • Low‑level and low‑flow alarms

      • High‑temperature insulation

      • Emergency shutoff circuits

    • Electrical System: Fully enclosed control cabinet with relays, breakers, and HMI interface

    These specifications ensured that the THC‑D‑24 would deliver the thermal stability the Michigan manufacturer needed for their molding operation.

    Application Analysis: Understanding the Customer’s Thermal Load

    Before engineering began, our team conducted a detailed analysis of the customer’s process. This included:

    • Mold size and mass

    • Oil channel geometry

    • Required heat‑up time

    • Steady‑state heat load

    • Ambient conditions

    • Duty cycle and production schedule

    This analysis confirmed that the customer required:

    • Fast heat‑up capability

    • Tight temperature stability (±1°C)

    • High flow to maintain uniform mold temperature

    • Continuous operation without overheating

    The THC‑D‑24 hot oil temperature control unit was selected because it met all these criteria with room for future expansion.

    Design and Engineering: Turning Requirements Into Reality

    Transforming the customer’s requirements into a fully engineered THC‑D‑24 hot oil temperature control unit began with a detailed design review. Our engineering team analyzed the customer’s heat‑load demands, mold channel layout, and required temperature stability. Using this information, we configured the THC‑D‑24 to match their exact process conditions.

    3D models were created for the heater assembly, pump layout, reservoir integration, and control panel. Thermal calculations ensured the 24 kW heater would maintain stable temperatures even during peak load conditions. Flow simulations confirmed that the circulation pump would deliver consistent oil movement through long piping runs and complex tooling geometries.

    This phase is where the foundation of a high‑performance hot oil TCU is established with precision and foresight.

    MetalPress - hot oil temperature control unit - THC-D - 00

    Fabrication and Assembly: Building the THC‑D‑24

    Once the design was approved, fabrication began. The heater housing, reservoir tank, and pump base were manufactured from high‑grade steel to withstand continuous high‑temperature operation. The 24 kW heating elements were installed and wired into the control cabinet, and the high‑temperature circulation pump was mounted and aligned for optimal flow.

    Stainless‑steel piping was routed with precision to ensure leak‑free operation. The electrical panel was assembled with temperature controllers, relays, safety circuits, and a digital HMI interface.

    By the end of assembly, the THC‑D‑24 hot oil temperature control unit stood fully built—mechanically complete, wired, plumbed, and ready for testing.

    MetalPress - hot oil temperature control unit - THC-D - 03
    MetalPress - hot oil temperature control unit - THC-D - 05
    MetalPress - hot oil temperature control unit - THC-D - 10
    MetalPress - hot oil temperature control unit - THC-D - 13

    Safety Integration and Client Feedback

    Safety is a core part of every thermal system we build. During Phase One, we integrated:

    • Over‑temperature protection

    • Low‑flow and low‑level alarms

    • Emergency shutoff circuits

    • High‑temperature insulation

    • Pressure‑relief components

    Throughout the process, we maintained open communication with the Michigan manufacturer. Their team provided feedback on control panel placement, preferred alarm settings, and connection locations. This collaboration ensured the final THC‑D‑24 hot oil TCU would integrate seamlessly into their production line.

    Phase One Conclusion: A Nearly Completed THC‑D‑24 Hot Oil Temperature Control Unit

    By the end of Phase One, the machine was:

    • Fully assembled

    • Wired and plumbed

    • Safety systems installed

    • Mechanically complete

    • Ready for testing and pre‑commissioning

    The next phase will focus on final inspection, temperature calibration, functional testing, and pre‑shipping preparation before delivery to the Michigan facility.

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