The respective advantages of the caps of Cable Extruder Machine and cone dual screw extrusion machine

Date:2022-7-19 Author:Sam

The respective advantages of parallel and cone dual screw extrusion machine
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; parallel double screw extrusion machine, or is the cone dual screw extruder better? It is a problem that users often ask when buying a dual screw extrusion machine.

\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; dual screw extruder classification
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; according to the rotation direction of the double screw, the extruder can be divided into the same direction and difference Two squeeze machines, the same squeezer is the same when the two screw rotation directions are worked, and the strange extrusion machine refers to the opposite direction of the rotation direction when the two screws work.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; Put as parallel according to the axle line of the double screw, which can be divided into two squeezers that intersect with a shaft lines in parallel. The axis line is parallel to the double screw extruder, and the axis line intersects the cone dual screw extrusion machine.

The dual screw extrusion machine also mesh and non -mesh.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; parallel and cone dual screw extrusion machine: There is a conveying mechanism for compulsory forwarding plastic, good mixed plasticization and dehydration capabilities, which have basically the same same basis Adaptability to the molding process of materials and plastic products.

\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; parallel and cone dual screw extrusion machines
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; 1, diameter: The diameter of the parallel double screw is the same, the cone cone is the same, cone cone, cone, cone, The small end diameter of the double screw is different from the large end diameter.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; 2. Concentric spacing: the center distance of the flat screw is the same, the two axes of the cone dual screw are clamped, and the size of the center distance changes along the axis.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; 3, long diameter ratio: parallel double snail (L/d) refers to the ratio of the effective part of the screw to the outer circle of the screw, the tapered double screw (L/d) refers to refers to The effective part of the effective part of the screw to the average value of the large end diameter and the diameter of the small end.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; from the above, we can clearly see that the most significant difference between parallel and cone dual screw extrusion machine is the geometric shape of the screw barrel, which causes structure and performance There are many differences in the above, although the characteristics of the two are different, they have their own advantages.

Parallel dual screw extrusion machine
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; due to the limitation of the small size of the center of the two screws, in the transmission gear box, the radial bearings that support the two output shafts are given The space of the thrust bearing and related transmission gears is very limited, although the design spinning machine It takes exhaustion, but it cannot solve the bearing capacity of the bearings, the digital number of the gear, the small diameter, and the small reality of the tail diameter of the two screws, which leads to the result of the difference in anti -torque. The output has a small torque and poor resistance. However, the plasticity of the long diameter ratio is the advantage of parallel double screw. It can increase and reduce the long diameter ratio according to the differences in the formation conditions to meet the requirements of the plastic processing process. Double screw extruders are difficult to do.

\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; cone dual screw extrusion machine
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; Inside, the central distance of the two axes gradually becomes larger from the small end to the large end, so that the two output shafts of the transmission gear box have a larger center distance. The gears and gear shafts in these transmission systems and the radial bearings and support of these gear shafts and the radial bearings of these gear shafts and the radial bearings of these gear shafts are There is a large installation space for thrust bearing, which can be equipped with large specifications of radial bearings and thrust bearing. Each transmission shaft has enough bearing diameter to meet the torque. Therefore A major feature of the dual screw extrusion machine. This parallel double screw extrusion machine is incomparable.

\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; stop bearing of dual screw extrusion machine
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; double screw extrusion machine will produce the screw head. Very large pressure (head pressure), the pressure is usually around 14MPa, sometimes even as high as 30MPa. This pressure forms a powerful axial thrust on the screw. Hollowing the thrust is the role of stopping bearing.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; 1. Parallel double screw extrusion machine is limited by the center of the two screws. The stop bearing is impossible. This contradiction usually uses several small diameter to stop bearing strings to jointly bear the powerful axial force. The core problem of using this method is that the loads that each thrust bearing must be uniform. The bearing is damaged in advance due to overload, and the load it should bear is added to other bearings to overload it. This continuous destruction is very serious. It can be seen that the structure of the parallel dual screw extruder is relatively complicated. Compared with the structure of the transmission system of the cone dual screw extrusion machine, the manufacturing cost of the gearbox is high and the maintenance is more complicated.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; 2. The cone dual screw extrusion machine has an angle of arranging the two screws, so the two output inputs of the transmission gear box have a large center distance. The thrust that is staggered before and after staggered, the rolling pearl bearing is enough to prevent the axial force formed by the pressure of the head of the machine.Large, the gear box manufacturing cost is low, and the maintenance is more convenient.
\u0026 nbsp; \u0026 nbsp; \u0026 nbsp; \u0026 nbsp; for users, the purchase of dual screw extruders is very important. Different types of dual screw extruders have different performance and application occasions. Clear the performance and application of various double screw extruders. For example, the meshing type rotating dual screw extrusion machine is widely applicable to the modification of the polymer that is not easy to heat the polymer because of its high speed, large shear rate, and a combined screw. Enhancement and material reactions are squeezed out. For example, the meshing heterogeneous rotation dual screw extrusion machine is because it has a good hybrid plasticization function, and its biggest feature is that the PVC powder is directly molded. If the geometric \u0026 nbsp; structure of the screw is changed, it can also be used for the formation of other materials, but its strength is still PVC molding processing. According to the size of the plastic section, determine the amount of extrusion, and then select the specifications of the dual screw extrusion machine. Under the same conditions of plastic processing and molding process, the cone double screw extrusion function adapts to the pressure of larger head, and the parallel double screw extrusion function adapts to smaller head pressure.