Flat twin screw extruder operation matters needing attention?

Time:2022-10-10

  flat twin screw extruderThe friction and calorific value formed in the process of resin extrusion and melting is less. In fact, when his resin is melted in the barrel of the twin-screw extruder, the twin-screw meshing shear effect is stable and balanced, so the raw materials are mixed and melted. The quality food is better. The following is a note on the operation of the lower flat twin screw extruder?

The emergence of flat twin-screw extruders can also improve labor efficiency. When the equipment is repaired, the heating and cooling system of the general twin screw extruder is often removed first, and then the screw is pulled out as a whole. Instead of using split twin screws, just loosen a few bolts, turn the worm gear box handle device, lift the upper half of the barrel, and open the entire barrel for maintenance. This not only shortens the maintenance time, but also reduces the labor intensity. In addition to these, of course, it can also provide high torque and high speed. At present, the development trend of flat twin screw extruder is to develop in the direction of high torque, high speed and low energy consumption. The effect of high speed is high productivity. However, it should be noted that every time the extruder is started, check whether there are foreign matters in the barrel, up and down the hopper and inside, check whether the fastening bolts of each part are loose, whether the safety cover is firm, and whether the position of each button switch is correct. Then add sufficient lubricating oil to each lubricating part, and do a good job in cleaning and sanitation of the equipment. After completing all this, when you are ready to drive, notify the staff around the flat twin screw extruder. Start the motor to drive the screw at low speed, and check whether the pointer of the working ammeter of the main motor swings normally. In addition, the test run of the screw should not exceed 3 minutes. After everything is normal, install the mold and install the connecting bolts of the mold. A layer of molybdenum disulfide or silicone oil should be applied before use to facilitate disassembly.

When using a flat twin-screw extruder, attention should be paid to the lowest working speed of the screw in the early stage of feeding production, and the feeding should be small and uniform. Check at any time whether the pointer of the working ammeter of the motor driving the lead screw changes. Especially after the extruder is put into normal production, the operator should always check the temperature change of the bearing part. When checking the temperature of the motor and each bearing part, lightly touch the inspection part with the back of your finger. Do not touch any rotating parts with your hands when the flat twin screw extruder is running. Then it is also recommended that when disassembling screws and molds, do not hit the parts directly with a heavy hammer. If necessary, use hardwood for removal or installation. The next step is to clean up the residues on the screw, barrel and mold. Be sure to clean them with bamboo or copper knives and brushes. Do not scrape the residues with steel knives or roast the parts with fire. The extruder must not be driven when handling extruder malfunctions. When rotating the extruder screw and adjusting the die, do not allow the operator to face the extruder barrel to prevent accidents. Of course, during the production work, the operator is not allowed to leave the post. The flat twin screw extruder should be stopped if required to leave. Remove the screws after parking. After removing the residue, apply a layer of anti-rust oil. If it is not used temporarily, it should be wrapped and hung vertically in a dry and ventilated place. Extruders and molding dies that have been discontinued for a long time should be coated with anti-rust oil and sealed to prevent foreign matter from entering.


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