High Quality Te-35 Small Twin Screw Extruder

In polymer processing,under pelletizing system is the newest granulation form at present, it is the ultimate solution for water cooling strand pelletizing line,water-ring granulation and so on.
Dart extrusion machinery co.,LTD has wally team for under water pelletizing system,absorbing new advanced technology fully,long-term research and development bring us new technological innovations,the quality and technological level of products domestic leading position.
about dart under water pelletizing system,not only applying to thermoplastic,but also being suitable for all thermoplastic polymers.about product
Different types of screw elements can be used in a twin screw extruder. Generally there are four major types of screw elements, namely conveying elements, kneading elements, backward-pumping elements and mixing elements. For each type there are many different sub-types.
The geometry of the conveying elements enables a good transport of the product through the extruder. Each conveying element is characterized by its number of flights, its length in millimeters, and its pitch. The pitch is defined as the axial length in millimeters, required for a complete thread. Conveying elements with a large pitch have a greater conveying effect than those with a small pitch. These elements are used to forward the material e.g. at feed openings, in order to avoid that pressure increases excessively at the openings.
Kneading elements are mostly used for dispersive mixing, but they are also used for distributive mixing processes. They consist of kneading discs with a certain thickness. Like the conveying elements there are several parameters by which the kneading elements are characterized. These parameters include the number of flights, the staggering angle between sequential kneading discs (in degrees), direction (clockwise or counter-clockwise) and the element length (in millimeters) .
Backward-pumping elements give a good distributive mixing and as the name implies they transport the product upstream instead of downstream. They are used for performing a more longitudinal homogenization.