The core of extruder equipment

The core of extruder equipment
All the technology of twin-screw is mainly concentrated in the transmission part and extrusion part, only in the combination of these two hardware core technology and software core technology can we create the most cost-effective and competitive modernized isotropic parallel twin-screw extruder equipment.

Twin-screw extruder compared with other models, a significant feature is the transmission system is different, twin-screw extruder requirements in a restricted space to the power evenly distributed to the two screws, which is the torque distribution. Different distribution technology determines the load carrying capacity of the gearbox, and even directly affects the life of the whole machine.

This is the traditional parallel three-axis gear box, is a mature twin-screw extruder transmission technology, domestic and foreign twin-screw extruder early most of the use of this structure, the leftmost is the transition axis, the middle is the B axis, the right is the A axis, the power from the motor is evenly distributed to the two output shafts of the A.B, the two axes each bear 50% of the torque, due to the limitation of the center distance of the AB axis, the B-axis gears is relatively small, the transfer of torque is limited, so the B-axis is a small gear, the B-axis gears is relatively small, the B-axis gears is a small gear. Due to the limitation of the center distance of AB axis, the gear of B axis is relatively small and the torque transmitted is limited, so the gear of B axis is the key to the bearing capacity of the twin-screw gear box, which directly determines the size of the motor power allocated to the gear box.

In order to improve the output torque of B-axis, the improved high-torque parallel three-axis distribution technology designs two sets of gears on B-axis, so that the output torque of B-axis is theoretically increased by two times, realizing the high-torque output, and the motor transmission power can be greatly increased, which improves the production capacity.

The extrusion part is mainly composed of barrel, threaded element and mandrel, which is the functional area of twin-screw extrusion to complete the plasticizing and mixing, and the clearance of screw, volume rate, rotational speed, strength of the mandrel and the life of the threaded element are the key indexes for evaluating the performance of the extrusion part of the twin-screw extruder.

The development trend of twin-screw at home and abroad is that small screws, small gap, large volume rate, high speed, high strength mandrel, wear-resistant and corrosion-resistant threaded elements, high efficiency, high output, long life of the whole machine, and stable quality of the product.
Small gap technology refers to the gap between the front and back of the screw prongs of the phase gearing, the gap between the threaded element and the cylinder, controlled at a very small level, - drive system output stability, small and stable output shaft runout is the basis and guarantee of small gap technology, small gap technology, to ensure that the material in the barrel of the uniform distribution of residence time, thus guaranteeing the stability of the quality of the product.

Small gap technology is also the basis of the screw high speed, high speed with a small gap, in order to ensure that the processing material is cleaned up in a timely manner, was quickly sent out of the barrel, if it is a conventional gap, high speed operation, due to the material can not be cleaned up in a timely manner, the residence time is long and easy to cause degradation.
After the breakthrough of torque distribution technology, the factors restricting the development of twin-screw have changed fundamentally. Previously, the constraints were the output torque and service life of the gear box, i.e., the strength of the mandrel is greater than that of the transmission box, and now it is the strength of the transmission box is greater than that of the mandrel, and the strength of the mandrel has become a constraint again.
Now GSmach puts the focus of R&D on mandrels and barrel bushings and threaded components, develops higher strength mandrels, more wear-resistant barrel bushings and threaded components, and welcomes new and old customers to develop together with GSmach.