{"id":30404,"date":"2026-07-29T13:45:44","date_gmt":"2026-07-29T13:45:44","guid":{"rendered":"https:\/\/doingcable.com\/?post_type=product&p=30404"},"modified":"2026-07-29T13:45:44","modified_gmt":"2026-07-29T13:45:44","slug":"core-wire-insulation-extruding-machine-for-granule","status":"publish","type":"product","link":"https:\/\/doingcable.com\/fr\/produit\/core-wire-insulation-extruding-machine-for-granule\/","title":{"rendered":"Machine d'extrusion d'isolant de fil de base pour granul\u00e9s"},"content":{"rendered":"

In modern cable manufacturing, the quality of the primary insulation layer on the conductor determines electrical safety, dielectric strength, and long-term service reliability under IEC 60502 and GB\/T 12706 standards. The Core Wire Insulation Extruding Machine for Granule is the specialized single-screw (or co-extrusion) production line that converts solid thermoplastic granules\u2014PVC, PE, XLPE, LSZH, TPU\u2014into a uniform, concentric insulation coating applied directly onto copper or aluminum conductors at line speeds of 300\u2013800 m\/min.<\/p>\n

\"Wire<\/p>\n

What Is a Core Wire Insulation Extruding Machine for Granule and How Does It Work?<\/h3>\n

A Core Wire Insulation Extruding Machine for Granule is a continuous extrusion system designed specifically for primary insulation of wire cores. Solid plastic granules are fed into a heated barrel, melted and homogenized by a precision single screw (typically L\/D 25:1\u201328:1), then forced through a crosshead die that coats the moving conductor with a controlled wall thickness. The coated wire is cooled in a multi-stage water trough, spark-tested, diameter-gauged, and taken up. Concentricity routinely exceeds 93 % and outer-diameter tolerance reaches \u00b10.005 mm on modern PLC-controlled lines.<\/p>\n

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The process begins with active or passive payoff of the bare conductor, optional pre-heating to remove surface moisture, precise tension control, and entry into the crosshead. Melt pressure, temperature profile, and haul-off speed are closed-loop controlled to maintain stable output.<\/p>\n

How Does the Machine Compare Across Screw Diameters and Materials?<\/h3>\n

Selection of screw diameter directly determines output capacity, wire-size range, and suitability for specific compounds. The following comparison summarizes typical 2024\u20132026 production data from leading manufacturers:<\/p>\n\n\n\n\n\n\n\n\n
S\u00e9rie de mod\u00e8les<\/th>\nScrew \u00d8 (mm)<\/th>\nL\/D Ratio<\/th>\nMax Output (kg\/h)<\/th>\nWire Diameter Range (mm)<\/th>\nMax Line Speed (m\/min)<\/th>\nPrimary Materials<\/th>\n<\/tr>\n<\/thead>\n
\u03a630\u201335<\/td>\n30\u201335<\/td>\n26:1<\/td>\n20\u201350<\/td>\n0.2\u20132.0<\/td>\n400\u2013600<\/td>\nPVC, PE<\/td>\n<\/tr>\n
\u03a645\u201350<\/td>\n45\u201350<\/td>\n25\u201326:1<\/td>\n50\u2013100<\/td>\n0.4\u20136.0<\/td>\n500\u2013800<\/td>\nPVC, PE, XLPE<\/td>\n<\/tr>\n
\u03a660\u201370<\/td>\n60\u201370<\/td>\n25:1<\/td>\n110\u2013170<\/td>\n0.8\u201312<\/td>\n300\u2013500<\/td>\nPE, LSZH, TPU<\/td>\n<\/tr>\n
\u03a680\u201390<\/td>\n80\u201390<\/td>\n25:1<\/td>\n200\u2013250<\/td>\n2.0\u201315<\/td>\n200\u2013400<\/td>\nXLPE, LSZH<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"Extrusion<\/p>\n

What Are the Critical Technical Parameters for Reliable Granule Extrusion?<\/h3>\n

Temperature zoning, screw geometry, and melt filtration determine insulation quality. Typical operating windows are:<\/p>\n\n\n\n\n\n\n\n\n\n\n
Param\u00e8tre<\/th>\nPVC Range<\/th>\nPE \/ HDPE Range<\/th>\nXLPE (Silane) Range<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
Barrel Zone 1\u20134 (\u00b0C)<\/td>\n130\u2013180<\/td>\n150\u2013210<\/td>\n115\u2013130<\/td>\n\u00b11\u20132 \u00b0C control<\/td>\n<\/tr>\n
Crosshead \/ Die (\u00b0C)<\/td>\n160\u2013185<\/td>\n180\u2013220<\/td>\n125\u2013140<\/td>\nUniform flow<\/td>\n<\/tr>\n
Screw Compression Ratio<\/td>\n2.7\u20133.2<\/td>\n2.5\u20133.0<\/td>\n2.8\u20133.2<\/td>\nBarrier design preferred<\/td>\n<\/tr>\n
Screen Pack<\/td>\n80\u2013150 mesh<\/td>\n80\u2013120 mesh<\/td>\n100\u2013150 mesh<\/td>\nPrevent gels<\/td>\n<\/tr>\n
Concentricity<\/td>\n\u226593 %<\/td>\n\u226593 %<\/td>\n\u226595 % (MV)<\/td>\nIEC requirement<\/td>\n<\/tr>\n
Spark Test Voltage<\/td>\n3\u201315 kV<\/td>\n3\u201315 kV<\/td>\n5\u201315 kV<\/td>\nOnline detection<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"Cable<\/p>\n

Screw and barrel are manufactured from 38CrMoAlA steel, nitrided and chrome-plated for wear resistance when processing abrasive LSZH or filled compounds. Modern lines incorporate gravimetric dosing, melt pumps for pressure stability, and automatic diameter feedback.<\/p>\n

\"Extrusion<\/p>\n

Which Failure Modes Occur Most Frequently and How Are They Prevented?<\/h3>\n

Four primary failure modes dominate production data:<\/p>\n

    \n
  1. Eccentricity \u2013 caused by die misalignment, uneven tension, or temperature gradient. Prevention: dial-gauge centering of tooling, closed-loop tension control, and multi-zone temperature uniformity.<\/li>\n
  2. Voids \/ bubbles \u2013 result from residual moisture in granules (>0.05 %) or local overheating. Prevention: forced drying of PVC\/PE (80\u201390 \u00b0C, 3\u20134 h) and proper venting in the feed zone.<\/li>\n
  3. Scorching \/ degradation \u2013 occurs when melt temperature exceeds material limits (PVC >200 \u00b0C releases HCl). Prevention: accurate PID control, regular screw cleaning, and short residence times.<\/li>\n
  4. Diameter variation \u2013 linked to haul-off speed fluctuation or screen packing. Prevention: servo-driven capstan and closed-loop laser gauging.<\/li>\n<\/ol>\n

    \"Extrusion<\/p>\n

    Inline spark testers (0.5\u201315 kV) and dual-axis diameter gauges detect these defects in real time, allowing immediate quarantine of non-conforming product.<\/p>\n

    How Should Engineers Select and Apply the Machine for Different Cable Types?<\/h3>\n

    Selection follows a clear logic:<\/p>\n

      \n
    • Building wire \/ data cable \u2192 \u03a645\u201360 mm, high line speed, PVC or PE, single-layer + stripe capability.<\/li>\n
    • Automotive wire \u2192 \u03a650\u201370 mm, LSZH or TPU capability, precise tension control.<\/li>\n
    • Medium-voltage power cable core \u2192 \u03a670\u201390 mm, XLPE-optimized screw, high concentricity tooling, optional triple-layer co-extrusion preparation.<\/li>\n
    • Fine magnet or electronic wire \u2192 \u03a625\u201335 mm, ultra-high speed (up to 1 000 m\/min), micro-diameter control.<\/li>\n<\/ul>\n

      Compliance with GB\/T 12706.1\u20132020, IEC 60502-1, and optional UL requirements is achieved by matching insulation thickness tables, mechanical properties, and electrical test protocols. Energy-efficient barrel heating and insulated crossheads reduce specific energy consumption, supporting 2024\u20132026 sustainability targets.<\/p>\n

      \"XLPE<\/p>\n

      \"Extruder<\/p>\n

      Key Takeaways and Technical Recommendations<\/h3>\n

      The Core Wire Insulation Extruding Machine for Granule delivers reliable, standards-compliant insulation when screw geometry, temperature profile, tooling concentricity, and online inspection are correctly matched to the polymer and conductor. High entity density in material selection (PVC, PE, XLPE, LSZH), precise process windows (\u00b11\u20132 \u00b0C), and closed-loop control eliminate the majority of field failures. Custom engineering of screw design, crosshead, and line configuration remains the decisive factor for long-term production stability and quality consistency.<\/p>\n

      Demande d'informations<\/strong> to receive detailed technical data sheets, material-specific screw recommendations, and a customized line configuration based on your conductor range and target standards.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

      Machine d'extrusion d'isolant de c\u0153ur de fil pour granul\u00e9s, con\u00e7ue pour l'isolation continue de haute pr\u00e9cision des conducteurs \u00e9lectriques. Traite les granul\u00e9s plastiques (PVC, PE, HDPE, XLPE, LSZH, TPU, Nylon) en couches d'isolation uniformes. Id\u00e9ale pour la production de fils de b\u00e2timent, c\u00e2bles d'alimentation, c\u00e2bles de donn\u00e9es, r\u00e9seaux locaux (LAN) et fils automobiles. Comprend un contr\u00f4le par API, une r\u00e9gulation de temp\u00e9rature multizone et une concentricit\u00e9 sup\u00e9rieure pour un fonctionnement stable \u00e0 long terme.<\/p>","protected":false},"featured_media":30911,"comment_status":"open","ping_status":"closed","template":"","meta":{"_joinchat":[]},"product_brand":[],"product_cat":[21,80,86],"product_tag":[1225,1223,1226,1227,1224],"class_list":{"0":"post-30404","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-all-product","7":"product_cat-cable-machinery","8":"product_cat-insulation-and-sheath-extrusion-production-line","9":"product_tag-cable-core-insulation-extrusion-line","10":"product_tag-core-wire-insulation-extruding-machine","11":"product_tag-pvc-pe-xlpe-insulation-extruder","12":"product_tag-single-screw-wire-extruder","13":"product_tag-wire-insulation-extruder-for-granules","15":"first","16":"instock","17":"shipping-taxable","18":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/product\/30404","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/comments?post=30404"}],"version-history":[{"count":2,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/product\/30404\/revisions"}],"predecessor-version":[{"id":30910,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/product\/30404\/revisions\/30910"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/media\/30911"}],"wp:attachment":[{"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/media?parent=30404"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/product_brand?post=30404"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/product_cat?post=30404"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/product_tag?post=30404"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}