Home » Machine & Precision Tools » Screw Barrel » Vented Screw And Barrels
Vented Screw And Barrels
Product Specifications
| Availability | In Stock |
GST No - 07AAAFH2490P1Z2 | Member since 2026
G/F, 3/23, KIRTI NAGAR, INDUSTRIAL AREA, New Delhi, Delhi, 110015
Vented Screw And Barrels Read More...
Product Details
Vented or two-stage screws are applied when volatiles must be removed in order to make a satisfactory product.How does a vented screw function? First, it reduces the melt pressure to atmospheric, so there is no tendency for the polymer to be pumped out the vent opening. That is accomplished by increasing the channel volume so that the output of the extruder only partially fills the flights under the vent.The first screw operates with no head pressure, while the second has to overcome any head pressure from the die and other downstream components. In order to keep the vent section of the screw from filling and developing vent flow, the second screw must have more output capacity than the first screw.Proper venting with no leakage or vent flow does not depend solely on the design of the screw. The barrel vent opening has to be fitted with a contoured plug called a diverter. The diverter deflects polymer away from the opening or else it will quickly become filled with melt. Its design is more of an art than a science but there are many variations that work, all using the same principles.Design of the vent section of the screw can be optimized for removing volatiles in applications such as devolatilization printed films and resins that are highly hygroscopic. Another approach is to make a three-stage screw with two vent sections, thereby doubling the devolatilizing area. Also, vacuum pumps can be applied to the vent to remove residual volatiles with low vapor pressure.
G/F, 3/23, KIRTI NAGAR, INDUSTRIAL AREA, New Delhi, Delhi, 110015
Send your enquiry to supplier
Related Products
₹ 80,000
| Appliance : PP |
| Condition : New |
| Diameter : 10MM TO 200 MM |
| Recommended Order Quantity : 1 Pair |
Steel Single Screw Barrel, for PVC Pipe Plant
₹ 2,35,000
| Appliance : PVC |
| I Deal In : New Only |
| Material : Steel |
| Quantity Per Pack : Varies |
For Industrial Bimetallic Twin Screw Barrels, Alloy Steel
₹ 50,000
| Availability : In Stock |
| Compressor Type : Rotary screw |
| Country of Origin : Made in India |
| Diameter : 30- 200 |
₹ 1,00,000
| Application : Industrial |
| Capacity : 200kg/H |
| Material : Metal |
| model : Single Extruder Screw Barrels |
For Industrial Single Puff Extruder Screw Barrel Set, Alloy Steel, Size: Length 450mm X Dia. 110mm
₹ 9,000
| Material : Alloy Steel |
| Screw Type : Single |
| Size : Length 450mm x Dia. 110mm |
| Usage/Application : Industrial |
For PVC Pipe Plant double bimetallic Conical Twin Screw And Barrel, Size: Ok
₹ 30,000
| Appliance : PVC |
| Color : ok |
| Recommended Order Quantity : 1 Piece |
| Screw Diameter : ok |
Tirupati Steel Ball Screw Assembly
₹ 18,000
| Brand : Tirupati |
| Finishing : Hot Dip Galvanized |
| Grade : 316 |
| Material : Steel |
Tirupati Hydropneumatics & Services, Aurangabad, Maharashtra
50 To 280 mm Bimetallic Screw Rod Barrel, For Industrial
₹ 45,000
| Brand : R R Hydraulics |
| Diameter : 50 to 280 mm |
| Length : 12 m |
| Material : Metal |
₹ 1,50,000
| Country of Origin : Made in India |
| Features : Rust Proof |
| Hardness : 70 HRC |
| Material : SS |
Single Soap Barrel Screw, carbon Steel, Size: 120 mm
₹ 22,000
| Appliance : carbon Steel |
| Diameter : 120 |
| Material : Premium Grade Steel |
| Screw Type : Single |
Customer Reviews
Submit your Reviews
Best Selling Products from H. K. Industries
Electrical Injection Moulding Machine
₹ 1,00,000
| Availability : In Stock |
| Platen Dimensions : Mould Space Dimensions |
