SKET Verseilmaschinenbau GmbH in Magdeburg supplies a wide range of machinery and equipment for the manufacture of cable and steel wire rope.
“DRUM TWISTERS” play a significant role in the production of cable and occupy a resultantly important position in the SKET supply programme.
With Drum Twisters from their MWR range, SKET offers stranding lines of great product specific flexibility and proven reliability for a wide range of applications.
These machine systems embody experience and know-how for
- the manufacture of energy cables from round and sector conductors
- cable screening
- the armouring of cables with round and flat wires
- the manufacture of Milliken cable
- the production of bundle construction telephone cable.
Principle of Operation
Rotating pay-offs, sector guides with automatic correction, tape applicators, rotating belt haul-offs and rotating take-ups are all standard assemblies for the MWR range.
SKET Drum Twisters, which can be tailored to specific applicational requirements, offer the maximum of output efficiency.
Machine Arrangement
- Rotating Pay-offs,
with variable back-twist, drums having a flange diameter of 1250 to 5000 mm and a capacity of up to 50 tonnes, drums accommodated between pintles, horizontal and vertical arrangements and stationary and moving drum lifts for loading without the need for an overhead crane - Stationary Pay-offs,
for drums having a flange diameter of 1250 to 2240 mm and a capacity of up to 10 tonnes, driven, brake controlled and with drum-fill tension control - Sector Correction Equipment,
giving automatic positional correction for the sector shaped conductors during the stranding operation - Stranding Dies,
with quick-change lay-plate ( nipple and sector guides) for the rotating die, driven, free-rotating and stationary types - Tape Applicators,
for the application of plastic tapes, aluminium or copper foil, or steel tape
- Rotating Take-ups,
for drums having a flange diameter of 1250 to 5000 mm and a capacity of up to 50 tonnes, with drum accommodation between pintles and automatic cable travers-ing on the drum via a controlled drive - Rotating Belt Haul-offs,
having a pull of up to 6 tonnes and being available as a combination of two symmetrically arranged haul-offs, with separately controlled individual drives - Rotating Haul-off / Take-up Combinations,
as an alternative to individual assemblies, having the same technical characteristics as the separate assemblies and being of particularly space saving design - Ancillary Equipment,
depending on product specification and technology, the drum twisters can be complemented with the following assemblies:- pay-offs for fillers
- pay-offs for screening
- pay-offs for armouring
- pay-offs for longitudinal tapes
- pre-formers for armouring wires
Automation
- Individual assembly drives, choice of AC or DC technology
- Speed and angular alignment synchronization as well as torque and tension control
- Maintenance of product related quality parameters under all operating conditions via controlled machine stopping including in the event of a loss of the mains supply voltage (AC technology)
- Programmable control and operation via a touch-screen facilitate fully automatic process control, systems operation and monitoring, programme management, operating data storage, data recording, service functions and maintenance
- In-house electrical and electronic engineering and technology driven software development
Applications
The Manufacture of Energy Cables
Cable diameter | max. 200 mm |
No. of conductors | three, four or five, plastic insulated |
Conductor construction | single or multi-wire (Al or Cu) |
Conductor cross-section | 16 – 800 mm2 |
Shapes | round, straight sector shaped, pre-spiralled sector |
The Manufacture of Screened / Armoured Cables
Cable diameter | max. 200 mm |
No. of screening wires (copper) | max. 140 |
Wire diameter | approx. 0.8 – 2.0 mm |
No. of galvanized armouring wires | max. 120 |
wire diameter | approx. 1.6 – 4.5 mm |
No. of flat wires | max. 120 |
Dimensions | approx. 5×0.8 mm (width x height) |
The Manufacture of Milliken Cables
Cable diameter | max. 80 mm |
Conductor cross-section | 800 – 3000 mm2 |
Conductor construction | single or multi-wire (Al or Cu) |
Shapes | sector shaped pre-spiralled segmental copper conductors |
The Manufacture of Bundle Construction Telephone Cables
Cable diameter | max. 120 mm |
No. of main bundles | max. 24 |
No. of pairs | max. 4,800 |
Main bundle diameter | approx. 8 – 35 mm |
General Technical Information
Linear speed: max. 80m/min
Rotational speed in relation to production weight:
- 60 rpm up to 12 tonnes
- 50 rpm up to 15 tonnes
- 40 rpm up to 25 tonnes
- 30 rpm up to 50 tonnes