Hot runner systems with supporting high-precision thermocouples have become standard configuration for high-efficiency and high-precision injection molding, and are widely used in automotive, medical, packaging, 3C electronics, home appliances and new energy industries. The automotive industry is the largest application market of hot runner systems, covering automotive interior and exterior parts, engine peripheral parts, electronic connectors and new energy vehicle battery shell parts. Automotive plastic parts are mostly large in size, thick and thin in wall, and use high-temperature engineering plastics. Relying on thermocouple real-time temperature monitoring, the hot runner system maintains stable melt fluidity, eliminates weld lines and warpage, and meets the high dimensional tolerance requirements of automotive parts.
The medical molding industry has extremely high requirements for material safety and molding stability. Disposable syringes, infusion accessories, medical detection consumables and surgical instrument shells all adopt hot runner mold design. The food-grade and pollution-free customized thermocouples are used to avoid material aging and deterioration caused by local overheating, ensure the biocompatibility of medical plastic raw materials, and realize high-cavity and pollution-free mass production.
Packaging industry is the most demanding scenario for hot runner high-cycle production, including plastic bottle caps, thin-walled lunch boxes, beverage containers and daily chemical packaging containers. High-cavity hot runner molds above 32 cavities are widely used. The distributed layout of thermocouples ensures the consistent temperature of each cavity melt, shortens the molding cycle greatly, eliminates the waste of cold runner materials, and improves production efficiency and economic benefits.
3C electronic and home appliance products such as mobile phone shells, precision connectors, TV shells and air conditioner parts have complex structures and dense precision features. Hot runner systems with micro-temperature measuring point thermocouples are adopted to realize precise temperature control of small nozzles, avoid material shortage and shrinkage defects of precision parts, and improve product yield. In addition, with the development of the new energy industry, photovoltaic plastic parts, energy storage battery accessories and lightweight composite material molding have gradually become emerging application fields of hot runner systems, and higher requirements are put forward for the high temperature resistance and long-term stability of supporting thermocouples.
