Extruder FAQ

Common problems and treatments of screw extruders In the use of mechanical equipment, it is inevitable that one problem or another will occur. Therefore, it is very important to find problems in time and find solutions in production. Here we analyze some common problems of screw extruders and explore the best treatment methods.
1. Common problems and treatment methods of extruders
1. No material intake, that is, "leakage" and screw heating.
1.1 Causes and solutions
1.1.1 The reamer is seriously worn. The gap between the reamer and the inner wall of the mud cylinder is too large, or the spiral angle of the reamer blade is not correct. When replacing the reamer, it should be noted that the gap is 3-5mm, and the reamer blade should be made according to the designed angle.
1.1.2 The surface of the reamer blade is too rough, and the friction between the mud and the blade is too large. Therefore, when surfacing the reamer, do not surfacing in groups, and replace all at once. It should be replaced step by step and in batches to ensure smooth brick production.
1.1.3 The liner of the mud cylinder wall is seriously worn. The gap between the reamer blade and the mud cylinder wall is too large, resulting in too much rotation of the mud in the mud cylinder, so that the mud cannot come out or go in. At this time, a new mud cylinder bushing should be replaced, or several ribs parallel or inclined to the axial direction should be installed on the inner wall of the bushing to replace the worn-out riveting grooves, prevent the mud from rotating ineffectively, and increase its effective extrusion.
1..1.4 The gap between the mud pressing knife plate and the reamer is too large to press down the mud. At this time, the knife plate should be adjusted or welded or updated so that the gap between it and the reamer blade is less than 10mm.
2. Mud strip movement bending
2.1 Causes and solutions
2.1.1 The mud strip bends to one side. This is caused by the center line of the machine mouth, core, mud cylinder and spiral reamer not being aligned or the roller bed being installed tilted. It can be solved by adjusting the position.
2.1.2 The mud strip has S-shaped bending. This is because the compression length of the machine neck is not enough, the tops of the main blade and the auxiliary blade of the first section spiral auger are not aligned, or the auxiliary blade of the first section auger is severely worn and becomes smaller, resulting in only the semicircle of the main blade pushing out the mud during operation. At this time, the first section auger should be replaced and the auxiliary blade should be welded.