Twin Screw Barrel for plastic extruder machine
About productDifferent 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 subtypes.
Conveying elements 
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
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
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.
Other screw elements
Product Show
Our companyTenda, headquartered in Nanjing, China, is a global manufacturing and trading company in the field of high performance plastics and rubber processing equipment, extrusion solutions, masterbatch and compounding, etc. Its unit Nanjing Tengda Extrusion Company is a professional manufacturer of twin screw extruder, single screw extruder, two stage extruder and its related auxiliaries. We tailor solutions from raw materials, materials processing equipment, to injection for different customers. Each Tenda's solution is designed, manufactured and commissioned by experienced teams of professionals engineers and after sales staffs.
Shipping & Delivery
Our machine is first painted with anticorrosive oil, and then wrapped in the plastic film before it is finally packed in the wooden case.
Packing: Wooden case for export, fit for multiple handing and long distance marine shipping.
Nanjing Tengda Machinery Equipment Co., Ltd. is an enterprise specialized in the technical development of polymer compounding and modification equipment, mainly the co-rotating twin-screw extruder, and the related technology and engineering, and the R&D and manufacturing of ancillary equipment. For the R&D of Zhuoyuan twin-screw extruder, in 2013, the company signed a bilateral cooperation agreement with the Fifty-eighth Institute of China Ordnance Group and formally established the R&D division of military twin-screw technology, which is co-founded to accelerate the industrialized development of the integration of military and civilian technology, inject the cutting-edge technology into the company and maximize the advantage of the high-end twin-screw extruder of our country.
The company has senior engineers, experts and experienced on-site commissioning engineers who have engaged in the research and production of twin-screw for many years. The equipment is widely used in many fields, such as the special production materials of the compounding technology, master batch, engineering modified materials, automotive materials, wire and cable, large plastic pipe, panels, petrochemical, chemical fiber architecture, medicine, agriculture, defense, etc.
All types of technologies applied in degradable plastic, modified plastic and blending plastics modification and the matched plastic pelletizing techniques: Special pelletizing machine and compounding equipment for the modification of degradable plastic master batch, multi-compound modified plastics and blended plastics will be your best choice for the creation of benefit.
"High-end, energy-saving" is the tireless pursuit as well as the permanent characteristic of the company since its foundation, so as to meet customers' requirements and bring greater economic and social benefits.
"Tengda Machine" provides you with sincere service and works with you to create a better tomorrow.
