Feedscrew & Barrel Engineers.
Phone: 01706 655402
Extruder Barrels
TWS can manufacture extruder barrels from Ø20mm upwards and a length of 6000mm in one piece. Barrels can be manufactured from nitriding steel or from a bimetallic blank.
Nitrided barrels can be manufactured with any size bore and offer a good all round performance for general purpose use.
The Nitriding process we use are the gas nitriding and plasma nitriding which produce a nitrided layer that penetrates to a minimum depth of 0.6mm and a hardness of approximately 65/70 HRC.
Bi-metallic barrels are more suitable for higher wear & corrosion applications.
There is several bore linings available depending on the application.(see table below)
Bimetallic barrel blanks are manufactured using a centrifugal-casting process. The term Bi-metallic indicates the fusion of two different metals in a high-temperature furnace that subjects the two metals to temperatures of more than 1100°C.
High revolution spinning of the white-hot cylinder fuses the inlay alloy to the bore wall. Subsequent carefully controlled cooling creates a super-hard, highly uniform lining in the cylinder bore, which is then honed to the finished internal diameter. The finished bore lining is at least 1.5 mm thick and on most coatings is 2/2.5 mm thick.
Injection Moulding Barrels.
TWS specialises in the manufacture of injection moulding barrels.
We currently manufacture barrels in either standard nitride or high specification bimetallic.
Nitrided barrels can be manufactured with any size bore and offer a good all round performance for general purpose use.
The Nitriding process we use are the gas nitriding and plasma nitriding which produce a nitrided layer that penetrates to a minimum depth of 0.6mm and a hardness of approximately 65/70 HRC.
Bi-metallic barrels are more suitable for higher wear & corrosion applications.
There is several bore linings available depending on the application.(see table below)
Bimetallic barrel blanks are manufactured using a centrifugal-casting process. The term Bi-metallic indicates the fusion of two different metals in a high-temperature furnace that subjects the two metals to temperatures of more than 1100°C.
High revolution spinning of the white-hot cylinder fuses the inlay alloy to the bore wall. Subsequent carefully controlled cooling creates a super-hard, highly uniform lining in the cylinder bore, which is then honed to the finished internal diameter. The finished bore lining is at least 1.5 mm thick and on most coatings is 2/2.5 mm thick.
Feed Liners.
TWS can manufacture replacement feed liners for feed sections on extruder’s, we can manufacture plain, grooved and spiral liners.
Plain liners can be either nitrided or bimetallic, and can be manufactured for any size machine.
Grooved and spiral liners are generally manufactured from nitriding steel (EN41b) then hardened by the nitriding process, it is possible to produce a grooved feed liner with a bimetallic bore but this is design specific and not compatible with every type of liner.
Contact Us
TWS
Corporation Road
Sparth Bottoms
Lancashire
OL11 4HJ
Telephone: 01706 655402
Fax: 01706 657735
Barrel Re-Sleeve.
TWS can re-sleeve Injection Moulding Barrels with a short sleeve at the exit end of the barrel up to 5 x diameter.
We currently re-sleeve barrels in:
- Bimetallic
- Nitrided
- H13 Tool Steel.
Welcome.
TWS is the UK's leading manufacturer and refurbisher of screws and barrels used in the Plastics, Rubber & Feed Industries.
Established in 1983 TWS has over 30 years experience in the manufacture, refurbishment and repair of screws and barrels used in the following industrial process, Extrusion, Injection Moulding, Blown Moulding, Compounding and Recycling.
Based in Rochdale just off the M62, means we are ideally situated to service the needs of our customers the length & breadth of the UK & beyond.
Extruder Barrels
Injection Barrels
Feed Liners
Contact us
Barrel Re-Sleeve
Welcome
TWS 2016
