● The screw structure is different
Diameter: the head and tail diameters of parallel twin screw is the same. The diameter of small end of conical twin screw is different from that of big end
Center distance: the center distance of the parallel twin screw is the same, the two axes of the conical twin screw present an angle, and the size of the center distance changes along the axis.
Length diameter ratio: parallel twin screw (L / D) refers to the ratio of the effective part length of the screw to the outer circle of the screw, and the conical twin screw (L / D) refers to the ratio of the effective part length of the screw to the average value of the large end diameter and the small end diameter
● Energy consumption
On the premise of the same output, the parallel twin-screw extruder is more energy-saving.
For instance, Both PS130-28 (parallel twin-screw extruder) and SJSZ110-220 (conical twin-screw extruder) can produce 40 Tons of SPC floor per day, but the main engine power of PS130-28 is only 110KW, while that of SJSZ110-220 is 200KW. Therefore, the parallel twin-screw extruder is more energy-saving
● Screw service life
Because of the head and tail diameter of conical twin screw is different. Therefore, under the same service time, the wear of conical twin screw is more serious than that of parallel twin-screw.
The service life of conical twin screw is generally 3 months. The service life of RICHON brand parallel twin screw is more than 6 months (The life of screw is guaranteed to be 6 months. If it is broken within 6 months, it will be replaced free of charge).
At the same output, the cost of the Parallel Twin Screw used in the RICHON extruder is only 75% of the conical twin screw. For example, the price of PS130-28 screw is only 75% of that of SJSZ110-220 screw.
● Plasticization performance
The screw length of parallel twin-screw extruder is longer than that of conical twin-screw extruder, so the plasticizing effect of parallel twin-screw extruder is better, and the kneading of materials is more uniform.
