The screw is the heart of Twin Screw Extruders for Powder Coatings and a key component of Twin Screw Extruders for Powder Coatings. It determines the production efficiency, plasticization quality, dispersion of additives, and melt of a Twin Screw Extruders for Powder Coatings. Temperature, power consumption, etc. Here is an introduction to the steps of screw cleaning for Twin Screw Extruders for Powder Coatings:

1. Choose the correct heating device
Burning or roasting to remove the plastic solid on the Twin Screw Extruders for Powder Coatings is the most common and effective method for plastic processing units. But never use acetylene flame to clean the screw.
The temperature of the acetylene flame can reach 3000°C. Cleaning the screw with the acetylene flame will not only destroy the metal characteristics of the screw, but also affect the mechanical tolerance of the screw. If the acetylene flame turns to long-lasting blue when baking a certain part of the screw, it means that the metal structure of this part of the screw has changed, which will cause the wear resistance of this part to decrease, and even the anti-wear layer and matrix will occur. Metal peeling. In addition, the local heating of the acetylene flame will also cause overheating on one side of the screw, which will cause the screw to bend.
Correct and effective method: use a blowtorch to clean the screw immediately after use. Because the screw has heat during processing at this time, the heat distribution of the screw is still uniform.
2. Choose the right cleaning agent
The manufacturer of Twin Screw Extruders for Powder Coatings tells you that today with a highly developed commodity economy, there is no shortage of various screw cleaners (screw cleaners) on the market, most of which are expensive and have different effects. Whether to use commercial cleaning agents depends on different manufacturers and production conditions; plastic modification processing enterprises can also use different resins to make screw cleaning materials according to their own production conditions, which can save a lot of money for the unit expenditure.
3. Choose the correct cleaning method
The manufacturer of Twin Screw Extruders for Powder Coatings tells you that the first step in cleaning the screw is to close the feeding insert, that is, to close the discharge port at the bottom of the hopper; then reduce the screw speed to 15-25r/min, and keep this speed to The melt flow at the front end of the die stops flowing. The temperature of all heating zones of the barrel should be set at 200°C. Once the barrel reaches this temperature, immediately begin cleaning. Depending on the extrusion process (the die may need to be removed to reduce the risk of excessive pressure at the front end of the extruder).
The manufacturer of Twin Screw Extruders for Powder Coatings tells you that cleaning must be done by one person: the operator observes the screw speed and torque from the control panel, and at the same time observes the extrusion pressure to ensure that the system pressure is not too high. During the whole process, the screw speed should be kept within 20r/min. In the application of low pressure die, first do not remove the die for cleaning. When the extrudate is completely converted from processing resin to clean resin, immediately stop the machine and remove the die head, and then restart the screw (speed within 10r/min) to allow the remaining clean resin to flow out.
4. Choose the right cleaning tools
The manufacturer of Twin Screw Extruders for Powder Coatings tells you that the correct and appropriate tools and cleaning materials should include: heat-resistant gloves, goggles, copper scraper, copper brush, copper wire mesh, stearic acid, electric drill, barrel ruler, cotton cloth.
The cleaning resin on the screw can be cleaned with copper scraper and copper brush. After the cleaning resin on the exposed screw is cleaned, the screw extraction device will advance 4-5 screw blocks forward and continue cleaning. After repeating this process, most of the screws are pushed out of the barrel.
The manufacturer of Twin Screw Extruders for Powder Coatings tells you that you must never use steel tools such as steel screwdrivers, scrapers or pry bars to remove the plastic stuck to the screw, because steel will damage the surface of the screw.