The two-stage heating nozzle processing technology is to heat the processed plastic particles by the injection molding machine to ensure that the plastic of the runner and the gate remains molten for injection molding. In the production of existing plastic products, the melted plastic is injected into the mold to be formed in a hot runner system consisting of a hot nozzle, a valve needle, a heater, a hot nozzle tip and a pressure cap. During glue injection, the valve needle moves up and down in the core hole on the axis line of the hot nozzle, and the valve needle is prone to swing during the up and down movement, making the hot nozzle glue injection unstable, and the upand down movement of the valve needle is easy to take the plastic material out of the upper part of the hot nozzle, thus affecting the normal operation of the hot nozzle.

Two-stage heating nozzle is a component of a hot runner system, usually composed of two heaters, divided into one stage and two stage heating. The temperature of the heater can be adjusted by the control system to control the heating temperature of the liquid. As the liquid flows through the hot nozzle, a stage heater heats the liquid initially, and then a second stage heater heats the liquid further to the desired temperature. By adjusting the temperature of the heater and the flow of the liquid, the heating temperature and flow of the liquid can be accurately controlled to improve production efficiency and product quality.

During the use of the two-stage heating nozzle, the following matters need to be noted:

Temperature setting: First of all, it is necessary to ensure that the temperature of the second stage heating nozzle is set correctly to avoid too high or too low temperature. Too high a temperature may lead to plastic degradation, while too low a temperature may lead to poor plastic flow and affect product quality.

Heating time: Heating time is also a factor to pay attention to. Too long a heating time may cause the plastic to overheat, while too short a heating time may not allow the plastic to fully flow. The value must be adjusted according to the actual situation.

Plastic characteristics: Different plastics have different flow characteristics and heat resistance, and these factors need to be understood and taken into account to avoid production problems.

Cleaning and maintenance: Regular cleaning and maintenance of the secondary heating nozzle is also very important. Cleaning can avoid the impact of impurities and residues on the product, while maintenance can ensure the long-term stable operation of the equipment.

Monitoring and adjustment: In the production process, it is necessary to closely monitor the working status of the second stage heating nozzle, and adjust it in time if abnormal conditions are found. At the same time, the equipment also needs to be optimized and improved according to the actual production situation.

Two-stage heating nozzle is a high efficiency, energy saving, environmental protection hot runner system components, widely used in injection molding machine, extruder and other plastic processing industry. In the process of use, it is necessary to pay attention to temperature setting, heating time, plastic characteristics, cleaning and maintenance, as well as monitoring and adjustment, to ensure the smooth progress of production and product quality.