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Home / 120℃/160℃/180℃: Which mould temperature controller is suitable for your injection molding process?

120℃/160℃/180℃: Which mould temperature controller is suitable for your injection molding process?

2026/03/11 By le zhan

mould temperature controller

In injection moulding, depending on material properties and process requirements, different mould temperature controllers settings, such as 120°C, 160°C, or 180°C, may be needed to achieve optimal moulding performance. This is because injection moulding typically involves a variety of materials, from general-purpose plastics to engineering polymers. Each material has specific requirements for mould heating and cooling temperatures. Therefore, selecting a mould temperature controller with an appropriate temperature range helps maintain stable mould temperatures, improve surface finish, reduce defects, and increase production efficiency. Topstar offers a variety of mould temperature controller models to meet these diverse needs.

Temperature Requirements in Mould Temperature Controller Selection

In injection moulding, mould temperature determines the flow, solidification, and final moulding of molten plastic. If the temperature is too low, the material may not fill the cavity, resulting in defects such as short shots, weld lines, or a poor surface finish. On the other hand, excessively high mould temperatures will prolong production cycles and reduce production efficiency.

A properly selected mould temperature controller maintains a stable heating and cooling cycle throughout the moulding process. This stability ensures consistent melt flow behaviour and improves part quality. Furthermore, precise temperature control helps reduce internal stress in moulded parts, especially in engineering plastics used in automotive, electronics, and precision components. For many manufacturers, maintaining a stable mould temperature is crucial for improving production consistency. Therefore, selecting the appropriate temperature range—120°C, 160°C, or 180°C—is a critical step in optimising the entire injection moulding process.

Temperature Requirements in Mold Temperature Controller Selection

Factors Influencing Selection

Several factors should be considered when making a selection. These factors include the type of plastic material, mould design, production speed requirements, and the available water pressure in the factory. For example, many general-purpose plastics, such as polypropylene, polystyrene, and ABS, typically only require a moderate mould temperature. In this case, a 120°C mould temperature controller provides sufficient heating capacity while maintaining energy efficiency.

However, engineering plastics such as nylon, PBT, or polycarbonate often require higher mould temperatures to achieve optimal crystallinity and dimensional stability. In these applications, a 160°C or even 180°C mould temperature controller may be necessary. Another important factor is the water pressure supply. Topstar addresses this issue by incorporating an indirect-cooling sealed-circulation system and a miniature booster pump into its 160°C and 180°C mould temperature controllers. This design ensures reliable system operation even under relatively low inlet water pressure, guaranteeing stable performance in a variety of industrial environments.

H2: Comparison of 120°C, 160°C, and 180°C Mould Temperature Controllers

The 120°C mould temperature controller is widely used in standard injection moulding processes and is particularly suitable for processing general-purpose plastics and products with less stringent mould temperature requirements. Topstar’s 120°C water-cooled mould temperature controller offers several practical advantages. One of its key features is a pressure detector with up to 1% accuracy, enabling the system to monitor inlet water pressure and maintain stable operation. Furthermore, the upper temperature limit can be adjusted according to the inlet water pressure, ensuring reliable performance even under fluctuating water pressure.

Due to its relatively simple design and efficient water-based heating system, the 120°C mould temperature controller offers excellent energy efficiency and low operating costs. It is commonly used in packaging products, consumer goods, and general-purpose plastic parts.

Mold Temperature Controller 7-1

160℃ for Engineering Plastics Processing

When injection moulding processes involve high-performance materials, 160°C is a more suitable choice. Many engineering plastics require higher mould temperatures to achieve good crystallisation and reduce internal stress in the moulded parts.

Topstar’s 160°C mould temperature controller employs an indirect-cooling, sealed-circulation mode, improving thermal stability and protecting the internal circulation system. Furthermore, it features a built-in micro-booster pump for water replenishment, ensuring effective controller operation even with inlet water pressure slightly above 0.3 bar. This design ensures stable heat transfer and consistent mould temperature throughout the production process. Therefore, manufacturers can achieve higher surface quality, better dimensional accuracy, and more reliable product performance when moulding engineering plastics.

mold-temperature-controllerTTWB-1810

180℃ for High-Temperature Molding Processes

For advanced injection moulding processes that require higher temperatures, 180°C provides the necessary heating capacity. Manufacturers typically use this controller in applications that process high-performance materials or require precise control of mould temperature.

Similar to the 160°C system, Topstar’s 180°C mould temperature controller employs an indirect-cooling, sealed-circulation design and a miniature booster pump. This configuration ensures stable water circulation and reduces reliance on high inlet water pressure. High-temperature mould control is particularly important for certain engineering plastics that require high temperatures to achieve optimal mechanical properties and surface finishes. Precise temperature control helps manufacturers produce high-quality parts with consistent performance.

Choosing the Appropriate Mould Range for Long-Term Stable Temperature Control

Each temperature range—120°C, 160°C, and 180°C—has a specific application in injection moulding. The 120°C mould temperature controller is suitable for general plastic applications and energy-efficient production. The 160°C mould temperature controller provides better temperature control for engineering plastics. In comparison, the 180°C mould temperature controller supports high-temperature moulding processes that require precise thermal stability. With advanced features such as pressure sensing, a sealed circulation system, and a miniature booster pump, Topstar’s mould temperature controllers deliver reliable performance even in harsh industrial environments.

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