Extruder Screws and Barrels

We develop and produce single screws and twin-screw, their diameter ranges up to 132 mm and length to 3,700 mm. We only use a material that is imported from Germany or Japan once the geometry has been determined. The screws are produced by the following individual processes.

• The blanks are prepared and annealed.
• Modern CNC lathers ensure a high degree of constant quality.
• Well-Proven special boring systems are used for producing the cooling channels.
• The screw geometry is milled out by computer numerical controlled machines.
• Before they undergo heat treatment, the workpieces are checked for warpage. Deviations are corrected immediately.
• The screw flights are polished by several stages, with surface roughness below Ra 0.8 gm.
• An acceptance report is written out of each screw during the final inspection.

One program comprises barrels of diameter up to 132 mm and length of up to 4,000 mm, we use a material that is imported from Germany or Japan. We supply barrels for single-screw or twin-screw that is produced by the following individual processes.

• Precise positioning of the barrel bores. The latest special boring machines are employed.
• Finishing the bore of the barrel by CNC lathe.
• Highest surface quality through honing of the barrel bores.
• Even the most difficult shapes can be machined to accept finishes on CNC machines.
• Highest wear resistance is obtained by deep Nitriding of the barred bores.
• Completed barrel is checked by gauging machine before delivery.
• An acceptance report is written out of each barrel during the final inspection.

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