{"id":31061,"date":"2026-08-20T13:35:51","date_gmt":"2026-08-20T13:35:51","guid":{"rendered":"https:\/\/doingcable.com\/?p=31061"},"modified":"2026-08-20T13:35:52","modified_gmt":"2026-08-20T13:35:52","slug":"what-is-a-bow-type-laying-up-machine","status":"publish","type":"post","link":"https:\/\/doingcable.com\/ar\/what-is-a-bow-type-laying-up-machine\/","title":{"rendered":"\u0645\u0627 \u0647\u064a \u0622\u0644\u0629 \u0627\u0644\u062a\u062c\u0645\u064a\u0639 \u0645\u0646 \u0646\u0648\u0639 \u0627\u0644\u0642\u0648\u0633"},"content":{"rendered":"

A \u0622\u0644\u0629 \u0648\u0636\u0639 \u0627\u0644\u0637\u0628\u0642\u0627\u062a \u0645\u0646 \u0627\u0644\u0646\u0648\u0639 \u0627\u0644\u0645\u0642\u0648\u0633<\/a><\/strong> (also known as a Bow Cabler, Skip Stranding Machine, or Bow Twister) is a high-speed cable manufacturing machine that assembles 2\u20136 (sometimes up to 7) insulated cores or conductors into a multi-core cable using rotating bows and 100% back-twist technology. It is primarily applied to ABC aerial bundled cables, control cables, mining cables, and low-to-medium voltage power cables typically up to 120 mm\u00b2.<\/p>\n\n\n\n

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Inquiry now<\/a><\/div>\n<\/div>\n\n\n\n

The machine delivers uniform lay length, excellent roundness, and near-zero residual torsional stress in the finished cable. Independent AC servo drives for the bow rotor, haul-off (capstan or caterpillar), and take-up, combined with PLC + HMI control, enable stepless pitch adjustment and line speeds commonly reaching 150 m\/min.<\/p>\n\n\n\n

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How Does a Bow Type Laying Up Machine Work?<\/h3>\n\n\n\n

The machine operates on the skip\/bow stranding principle. Insulated cores are paid off from stationary or cradled bobbins and guided through a series of high-tensile steel or carbon-fiber bows that rotate at high speed around the cable axis. As the bows rotate, each core is laid helically while receiving a precise 100% back-twist that cancels the rotational stress that would otherwise remain in the cable.<\/p>\n\n\n\n

The central core (if present) runs straight through the axis. Optional filler pay-offs (up to 24 stations) and online semi-tangential taping heads can be integrated so that filling and wrapping occur in the same pass. A dual-wheel capstan or caterpillar haul-off pulls the finished cable at constant tension, and the take-up unit winds it onto large drums (commonly PN1250\u2013PN2500). Full-to-empty bobbin tension is maintained by electromagnetic or powder brakes with automatic compensation.<\/p>\n\n\n\n

This design produces cables that meet the geometric and mechanical requirements of multi-core constructions described in IEC 60502-1 for extruded power cables.<\/p>\n\n\n\n

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What Are the Main Technical Advantages Compared with Cradle-Type Laying-Up Machines?<\/h3>\n\n\n\n

Bow-type machines offer significantly higher productivity and better stress control for medium-section multi-core cables.<\/p>\n\n\n\n

\u0645\u064a\u0632\u0629<\/th>Bow Type \/ Skip Stranding Machine<\/th>Traditional Cradle Laying-Up Machine<\/th><\/tr><\/thead>
Back-twist<\/td>100% (near-zero residual stress)<\/td>Partial or limited<\/td><\/tr>
Max rotor speed<\/td>150\u2013500 rpm (model dependent)<\/td>50\u2013200 rpm<\/td><\/tr>
Typical line speed<\/td>Up to 150 m\/min<\/td>Lower (inertia-limited)<\/td><\/tr>
Productivity<\/td>3\u201310\u00d7 higher for suitable sizes<\/td>\u0623\u062f\u0646\u0649<\/td><\/tr>
Suitable cross-section<\/td>ABC, control & power \u2264120 mm\u00b2<\/td>Larger power cables (>120 mm\u00b2)<\/td><\/tr>
Pitch adjustment<\/td>Stepless via PLC\/HMI<\/td>Manual gear changes<\/td><\/tr>
Tension stability<\/td>Constant full-to-empty bobbin<\/td>Variable<\/td><\/tr>
Noise & enclosure<\/td>Fully enclosed, typically <75 dB<\/td>Higher noise, often open<\/td><\/tr>
Online filling & taping<\/td>Easy single-pass integration<\/td>Usually separate operations<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Typical Technical Parameters of Modern Bow Type Laying Up Machines<\/h2>\n\n\n\n
Model Range<\/th>Pay-off Bobbin (mm)<\/th>Max Rotate Speed (rpm)<\/th>\u0633\u0631\u0639\u0629 \u0627\u0644\u062e\u0637 (\u0645\/\u062f\u0642\u064a\u0642\u0629)<\/th>Conductor Section (mm\u00b2)<\/th>Max Core \u00d8 (mm)<\/th>\u0642\u0648\u0629 \u0627\u0644\u0645\u062d\u0631\u0643 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 (\u0643\u064a\u0644\u0648\u0648\u0627\u0637)<\/th><\/tr><\/thead>
630\u2013800 series<\/td>630\u2013800<\/td>600\u2013880<\/td>100\u2013290<\/td>1.5\u201310 \/ small control<\/td>6\u201315<\/td>35\u201355<\/td><\/tr>
KW-100 \/ 1000<\/td>1000<\/td>400\u2013500<\/td>150<\/td>8\u201370 (1+3B to 1+5B)<\/td>12<\/td>45\u201365<\/td><\/tr>
KW-125 \/ 1250<\/td>1250<\/td>300\u2013400<\/td>150<\/td>10\u201395<\/td>16<\/td>55\u201375<\/td><\/tr>
KW-160 \/ 1600<\/td>1600<\/td>180\u2013400<\/td>120\u2013150<\/td>14\u2013120<\/td>20<\/td>65\u201390<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Pay-off and take-up drum sizes are customizable. Copper single-wire diameter \u22651.5 mm and aluminum \u22651.7 mm are standard minimums. Lay length is typically adjustable from 30 mm to 1500 mm or more via PLC.<\/p>\n\n\n\n

Which Cables Are Best Produced on a Bow Type Laying Up Machine?<\/h3>\n\n\n\n

The machine is optimized for:<\/p>\n\n\n\n