Major Component on MY56×2A Twin-Screw Extruder

Cutting device

As an important component, the cutting device has a great effect on the sustained and steady running of the extruder as well as the pellet form of expanding feed. The cutting device is mainly composed of a slide rail, housing, a screw moving device and a cutter driving unit, see Fig.3.7.

When working, slide the housing as well as the cutting driving device to the working place and fix. The cutter driving unit can be adjusted forward by turning the screw on the screw moving device when there is any wore on the cutter during working, which can ensure the clearance between the cutter blade and the die plate on the feed extruder keep appropriate. After working, the housing and cutter driving unit should be slide to the other side of the slide rail and then fixed.

Cutter driving unit

1. The driving component for cutting consists of cutting knives and a driving device with variable speed. A variable frequency speed control motor is applied for variable-speed driving; the cutting knife bar drives the cutting knives to rotate. The length of product to be cut is cont rolled by adjusting the rotating speed of the cutting knives.
2. There is a long hole in the knife support, through adjustment its position on the knife tray, the edge surface of knife can be in a surface.

Discharging device

In comparison with discharging device (I), a "8" shaped hole spacing plate is added in discharging device (II), and the others are the same except length of the screw.
The material extruded and ripened in extruder chamber must be formed through a discharging device and the discharging device is mainly used for limiting the flow of material to form the required pressure for expanded material at the end of expanding chamber. Structure of discharging device and selection of die can directly influence the quality of material.
The discharging assembly of this extruding machine mainly consists of "8" shaped bus bar and five die plates are available for this extruder.

Bypass

The bypass is located between outlet of different diameter cylinder conditioner and the inlet of extruding assembly. The flow direction of material from the conditioner can be selected through bypass: flow into inlet of extruding assembly for extrusion or flow out through chute of the bypass in convenience for checking conditioning efficiency of material.