The conical twin-screw extruder is specially designed for the production of PVC pipes, PVC profiles, WPC profiles, PVC pellets, SPC floors; the conical twin-screw extruder rotates at 30-45rpm. It is a slow extruder. Conical twin-screw extruders have different structures that make them a better extruder for producing plastic products. While the conical twin-screw extruder may work similarly to conventional single-screw and parallel twin-screw extruders, this machine has a different construction that makes it a better choice.
The conical twin-screw extruder gearbox has two parts, the drive gearbox and the distribution box, the two conical twin-screw will be connected to the distribution box, the conical twin-screw extruder also uses a twin-screw feeder, it is more Stable and accurate.
We use aluminum ceramic and aluminum heaters on conical twin-screw extruders, all heaters have an external protective cover to avoid personal injury, and water circulation cooling is installed in the feeding area to prevent the PVC material from being blocked, because the heating power will Transfer from the screw barrel to the feed zone.
In addition, we have a vacuum system with good performance that can draw moisture and air from the barrel; it will improve the quality of plastic products; all cables have been selected with larger diameters to avoid unstable voltage and current. For special voltages, like 220V, we’ll use double-diameter cables because the current is much higher than the others. The details of our conical twin screw extruders will be considered as we have manufactured all voltage extruders.
The conical twin-screw extruder consists of the following parts:
-Gear transmission system
– quantitative feeding
– Heating, cooling and electrical control elements, etc.
Although this is the basic structure of a conical twin screw extruder, there can be more or fewer components depending on the application requirements. Conical twin screw extruders are generally reliable and efficient machines for the manufacturing process.
How is the structure of a conical twin-screw extruder different from other types of twin-screw extruders?
The conical twin-screw extruder has two parts in the gear box, which are the gear box and the independent box of the two screws. In addition to this, the rotational speed of the conical twin-screw extruder is large. Therefore, the extruder can also work at low speed.
Since its twin screw is conical, which affects the high pressure of the die, we can use more caco3 in the recipe to reduce production costs.
Finally, there is also a vacuum system inside the conical twin screw extruder. This vacuum system can enhance the plasticization of PVC powder.
Conical twin-screw extruder is the most popular twin-screw extruder in China and even in the world.
|Qty of screw||2||2||2||2||2|
|Screw direction||Opposite and outer|
|Main motor power(kw)||22||37||55||90||185|
|Qty of barrel heating zone||4||4||5||5||6|
|Center height of machine(mm)||1000||1000||1000||1100||1300|