What are the methods for cleaning the barrel of the waste plastic granulator?

Indirect refueling method. When the raw material and the material stored in the barrel do not have a common melting temperature, the indirect refueling method can be used. The operating procedures for indirect refueling are as follows. If the molding temperature to be changed is high, and the remaining material in the barrel is heat sensitive, such as polyoxymethylene, etc., for fear of plastic decomposition, two-step cleaning should be used, that is, first use a thermally stable such as polystyrene or Low-density polyethylene and other plastics or recycled plastics of this type of plastics are used as transitional cleaning materials to perform transitional cleaning, and then replace the transitional cleaning materials with the desired replacement. Separate the screw. Since the screw of the waste plastic granulator is easy to disassemble, relatively speaking, the above refueling method is used for refueling. This method can save a lot of raw materials. The barrel cleaning of the waste plastic granulator usually adopts material change cleaning. Before cleaning, it is necessary to grasp the technical data such as the thermal stability of the material in the barrel and the material to be replaced, the molding temperature range and the compatibility between different plastics, and the correct operation method during cleaning to save time and raw materials. There are two methods for refueling cleaning: direct refueling method and indirect refueling method.

Direct refueling method. When the raw material and the material stored in the barrel have a common melting temperature, the direct material exchange method can be used. The operating procedures for direct refueling are as follows. If the molding temperature of the material to be changed is higher than the temperature of the material in the barrel, the temperature of the barrel and nozzle should be raised to the low processing temperature of the material to be changed, and then add the material to be changed to open the die and directly extrude , Until the stored material in the barrel is cleaned, and then adjust the temperature for normal production. If the molding temperature of the material to be changed is lower than the temperature of the material in the barrel, the barrel temperature should be raised to make the stored material in good condition. Flow state, and then cut off the heating power supply of the barrel and nozzle, and clean the material under cooling with the material to be changed. When the temperature drops to the processing temperature of the material to be changed, it can be transferred to production.

Indirect refueling method. When the raw material and the material stored in the barrel do not have a common melting temperature, the indirect refueling method can be used. The operating procedures for indirect refueling are as follows. If the molding temperature to be changed is high, and the remaining material in the barrel is heat sensitive, such as polyoxymethylene, etc., for fear of plastic decomposition, two-step cleaning should be used, that is, first use a thermally stable such as polystyrene or Low-density polyethylene and other plastics or recycled plastics of this type of plastics are used as transitional cleaning materials to perform transitional cleaning, and then replace the transitional cleaning materials with the desired replacement. Separate the screw. Since the screw of the waste plastic granulator is easy to disassemble, relatively speaking, the above refueling method is used for refueling. This method can save a lot of raw materials.