What Are the Application Advantages of Bayonet Type Hot Runner Thermocouples

The bayonet type thermocouples have been widely used in various medium and high-end hot runner nozzle and manifold temperature measurement scenarios due to its quick installation, good thermal contact, strong vibration resistance and convenient disassembly and maintenance, becoming the mainstream preferred type in the hot runner industry. Compared with traditional threaded fixed thermocouples, the bayonet structure adopts spring compression positioning design, which can automatically compensate the thermal expansion and contraction gap of the mould steel under high temperature working conditions, always keep close contact between the temperature measuring head and the mounting hole bottom, and avoid temperature measurement drift caused by loose contact .

In terms of installation efficiency, bayonet thermocouples do not require repetitive screwing and torque adjustment. One click insertion and clamping allow positioning and installation in place. Disassembly is easy and rapid, which considerably saves the time of mould maintenance, replacement and troubleshooting. For injection moulding companies with regular mould change and frequent hot runner maintenance, it can significantly reduce mould downtime and improve the flexibility of production scheduling.

Another essential benefit, is vibration resistance and stability. During the mold's high-speed closing and opening cycle, the standard fixed thermocouple is easily shaken off and displaced, leading to poor thermal contact and signal fluctuations. The internal spring compression structure of the bayonet thermocouple can absorb the mechanical vibration, can keep the temperature measuring point stable without displacement, and can retain the precise and stable temperature measurement for a long time in the high-cycle production moulds.

In thermal response, the bayonet type is closely fitted to the hole wall without gap, and it has fast heat conduction speed and sensitive temperature signal feedback. The temperature controller can automatically adjust the heating power in real time according to the subtle temperature change, effectively suppress the temperature overshoot and fluctuation, ensure the uniform and stable melt temperature of the hot runner, and improve the surface quality and dimensional consistency of the plastic parts. In addition, the bayonet thermocouple structure is small in size, small in installation space, strong in universality, and is suitable with most popular hot runner brand nozzle and manifold mounting holes. It can be mutually substituted with traditional threaded thermocouples by easy matching.

The popularisation of bayonet thermocouples in the everyday operation of injection moulding factories can reduce the complexity of maintenance, reduce the failure rate and lengthen the service life, and produce obvious economic benefits in terms of production stability and labour cost saving.333