Twin Screw Barrel for Plastic Extruder Machine
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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 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) .Â
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 company
Tenda, 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.
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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.
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FAQ
Q: Are you trading company or manufacturer?
A: We are factory. We have the technical production team, and the workers are all very experienced.
Q: Why choose you?
A: ---You can get a very fair price from us and our price can make you beat your competitors in the market.
  ---Our excellent service:
       for a quick, no hassle quote just send email to customer.
       We promise to reply with a price within 24 hours.
       If you need an advice, just call our export office at +86 025 52296133, we will answer your questions immediately.
  ---Our quick manufacturing time:
       for normal orders, we will promise to produce within 30 work days.
       as a manufacturer, we can ensure the delivery time according to the formal contract.
Q: What kind of certification do you have?
A: Our products have obtained ISO9001 and CE certification, the quality can be guarantee. We focus on the field of extrusion machine, and aim to be the best manufacturer of this field.
Q: What's the payment?
A: T/T, Western Union, Paypal, Money Gram and etc.
Â
Â
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 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) .Â
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 company
Tenda, 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.
Â
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.
Â
FAQ
Q: Are you trading company or manufacturer?
A: We are factory. We have the technical production team, and the workers are all very experienced.
Q: Why choose you?
A: ---You can get a very fair price from us and our price can make you beat your competitors in the market.
  ---Our excellent service:
       for a quick, no hassle quote just send email to customer.
       We promise to reply with a price within 24 hours.
       If you need an advice, just call our export office at +86 025 52296133, we will answer your questions immediately.
  ---Our quick manufacturing time:
       for normal orders, we will promise to produce within 30 work days.
       as a manufacturer, we can ensure the delivery time according to the formal contract.
Q: What kind of certification do you have?
A: Our products have obtained ISO9001 and CE certification, the quality can be guarantee. We focus on the field of extrusion machine, and aim to be the best manufacturer of this field.
Q: What's the payment?
A: T/T, Western Union, Paypal, Money Gram and etc.
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