{"id":1204,"date":"2026-03-14T15:58:41","date_gmt":"2026-03-14T07:58:41","guid":{"rendered":"https:\/\/extruder-lab.com\/?p=1204"},"modified":"2026-03-17T15:59:21","modified_gmt":"2026-03-17T07:59:21","slug":"selection-guide-for-conical-parallel-twin-screw-extruder","status":"publish","type":"post","link":"https:\/\/extruder-lab.com\/fr\/selection-guide-for-conical-parallel-twin-screw-extruder.html","title":{"rendered":"Guide de s\u00e9lection pour les extrudeuses \u00e0 deux vis coniques et parall\u00e8les (Lab Machine)"},"content":{"rendered":"

Dans les laboratoires de recherche sur les mat\u00e9riaux polym\u00e8res, les extrudeuses \u00e0 double vis sont essentielles pour la modification des m\u00e9langes de mat\u00e9riaux, les processus d'extrusion r\u00e9actifs et la pr\u00e9paration de m\u00e9langes ma\u00eetres fonctionnels ; leur s\u00e9lection a un impact direct sur l'efficacit\u00e9 exp\u00e9rimentale. Actuellement, les \u00e9quipements de m\u00e9lange courants sont principalement divis\u00e9s en deux types : les extrudeuses \u00e0 double vis coniques et les extrudeuses \u00e0 double vis parall\u00e8les. Bien qu'elles semblent similaires, les diff\u00e9rences dans la structure des vis conduisent \u00e0 des sc\u00e9narios d'application diff\u00e9rents. Cet article fournit des conseils syst\u00e9matiques pour la s\u00e9lection des \u00e9quipements de laboratoire sous trois aspects : le principe de fonctionnement, la compatibilit\u00e9 des mat\u00e9riaux et les objectifs exp\u00e9rimentaux.<\/p>\n\n\n\n

\n
\"Twin-Screw<\/figure>\n\n\n\n
\"Twin-Screw<\/a><\/figure>\n<\/figure>\n\n\n\n

Comparaison de la structure de base et du principe de fonctionnement :<\/h2>\n\n\n\n
Caract\u00e9ristiques<\/td>Extrudeuse bi-vis conique<\/td>Extrudeuse \u00e0 deux vis parall\u00e8les<\/td><\/tr>
Forme de la vis<\/td>Le diam\u00e8tre de la vis augmente progressivement (conique)<\/td>Le diam\u00e8tre de la vis reste constant (cylindrique)<\/td><\/tr>
Sens de rotation<\/td>Principalement en contre-rotation<\/td>principalement en co-rotation<\/td><\/tr>
M\u00e9thode de compression<\/td>Compression g\u00e9om\u00e9trique<\/td>compression fonctionnelle<\/td><\/tr>
R\u00e9sistance au cisaillement<\/td>Faible \u00e0 moyen, m\u00e9lange l\u00e9ger<\/td>moyenne \u00e0 \u00e9lev\u00e9e, forte capacit\u00e9 de dispersion<\/td><\/tr>
Rapport typique entre la longueur et le diam\u00e8tre (L\/D)<\/td>10:1-15:1<\/td>20:1-40:1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Analyse de la compatibilit\u00e9 des mat\u00e9riaux<\/h2>\n\n\n\n
    \n
  1. Sc\u00e9narios recommand\u00e9s pour les extrudeuses coniques \u00e0 double vis<\/li>\n<\/ol>\n\n\n\n
      \n
    • Produits en PVC rigide (tubes, profil\u00e9s) : La rotation inverse et le faible cisaillement emp\u00eachent la d\u00e9gradation par d\u00e9shydrochloration du PVC ; la temp\u00e9rature de traitement est g\u00e9n\u00e9ralement contr\u00f4l\u00e9e \u00e0 160-180\u2103.<\/li>\n\n\n\n
    • Composites bois-plastique (WPC) \u00e0 forte charge : Lorsque la teneur en farine de bois\/carbonate de calcium est sup\u00e9rieure \u00e0 50 %, la compression progressive de l'extrudeuse conique r\u00e9duit la rupture de la charge et am\u00e9liore la qualit\u00e9 de la surface.<\/li>\n\n\n\n
    • Plastiques recycl\u00e9s (contenant des impuret\u00e9s) : Le temps de s\u00e9jour court et le cisaillement doux r\u00e9duisent le risque de d\u00e9gradation thermique secondaire.<\/li>\n<\/ul>\n\n\n\n
        \n
      1. Sc\u00e9narios recommand\u00e9s pour les extrudeuses \u00e0 deux vis parall\u00e8les<\/li>\n<\/ol>\n\n\n\n
          \n
        • M\u00e9langes biod\u00e9gradables (PLA\/PBAT) : Un contr\u00f4le pr\u00e9cis de la dispersion et de la compatibilit\u00e9 est n\u00e9cessaire ; des vis modulaires peuvent optimiser la section de m\u00e9lange.<\/li>\n\n\n\n
        • D\u00e9veloppement de m\u00e9langes-ma\u00eetres fonctionnels (ignifuges, conducteurs, antibact\u00e9riens) : Des blocs de malaxage \u00e0 cisaillement \u00e9lev\u00e9 assurent une dispersion uniforme des nanocharges (telles que les nanotubes de carbone).<\/li>\n\n\n\n
        • Extrusion r\u00e9active ou proc\u00e9d\u00e9s de d\u00e9viation : Les zones \u00e0 temp\u00e9ratures multiples, le d\u00e9gazage sous vide et le temps de s\u00e9jour prolong\u00e9 favorisent le greffage chimique ou l'\u00e9limination des solvants.<\/li>\n<\/ul>\n\n\n\n

          Recommandations pour la d\u00e9cision de s\u00e9lection<\/h2>\n\n\n\n
          Objectifs exp\u00e9rimentaux<\/td>Type d'\u00e9quipement recommand\u00e9<\/td>Raisons<\/td><\/tr>
          V\u00e9rification de la stabilit\u00e9 thermique des formulations de PVC<\/td>Extrudeuse bi-vis conique<\/td>Faible cisaillement, temps de s\u00e9jour court, \u00e9vitant le jaunissement\/les taches noires<\/td><\/tr>
          D\u00e9veloppement d'un m\u00e9lange-ma\u00eetre de fibres de carbone hautement dispers\u00e9es<\/td>Parall\u00e8le <\/td>N\u00e9cessite un cisaillement \u00e9lev\u00e9 et un m\u00e9lange en plusieurs \u00e9tapes<\/td><\/tr>
          Essais \u00e0 petite \u00e9chelle des composites bois-plastique<\/td>Conique <\/td>Prot\u00e8ge les fibres du bois et \u00e9vite le pon\u00e7age excessif<\/td><\/tr>
          \u00c9tude de compatibilit\u00e9 des m\u00e9langes PLA\/PHA<\/td>Parall\u00e8le<\/td>Le r\u00e9glage flexible de la combinaison de vis permet d'optimiser le collage de l'interface<\/td><\/tr>
          Enseignement universitaire de base (d\u00e9monstration des principes d'extrusion)<\/td>Parall\u00e8le <\/td>La conception modulaire permet une d\u00e9monstration plus intuitive du processus de m\u00e9lange<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

          Les \u00e9quipements de laboratoire actuels ont tendance \u00e0 se miniaturiser :<\/h3>\n\n\n\n

          Extrudeuses coniques miniatures (diam\u00e8tre du petit bout de la vis \u226420 mm) : adapt\u00e9es \u00e0 la validation du PVC ou du WPC avec des lots <100 g\/lot ; extrudeuses parall\u00e8les de bureau (diam\u00e8tre de la vis 12-25 mm) : adapt\u00e9es au criblage de formulations \u00e0 haut d\u00e9bit.<\/p>\n\n\n\n

          Lors du choix de l'\u00e9quipement d'extrusion de laboratoire, il convient de prendre en compte les diff\u00e9rents syst\u00e8mes de mat\u00e9riaux et les objectifs de R&D. Pour les mat\u00e9riaux thermosensibles et \u00e0 fort taux de remplissage, les extrudeuses coniques \u00e0 compression naturelle, \u00e0 forte capacit\u00e9 de transport des poudres et \u00e0 bonne adaptabilit\u00e9 aux mat\u00e9riaux thermosensibles sont pr\u00e9f\u00e9rables ; si la dispersion et la flexibilit\u00e9 du processus sont recherch\u00e9es, les extrudeuses parall\u00e8les \u00e0 conception modulaire, \u00e0 cisaillement pr\u00e9cis et contr\u00f4lable, et \u00e0 grande flexibilit\u00e9 du processus sont s\u00e9lectionn\u00e9es. Pour les institutions de recherche et de d\u00e9veloppement, l'\u00e9quipement des deux types de mat\u00e9riel pour couvrir les diff\u00e9rents besoins en mati\u00e8re de recherche et de d\u00e9veloppement est \u00e9galement une solution d'allocation des ressources.<\/p>\n\n\n\n

          <\/p>","protected":false},"excerpt":{"rendered":"

          In polymer materials research laboratories, twin-screw extruders are crucial for material blending modification, reactive extrusion processes, and the preparation of functional masterbatches; their selection directly impacts experimental efficiency. Currently, mainstream mixing equipment is mainly divided into two types: conical twin-screw extruders and parallel twin-screw extruders. Although they appear similar, differences in screw structure lead to […]<\/p>\n","protected":false},"author":1,"featured_media":1205,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[11],"tags":[16],"class_list":["post-1204","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product-introduction","tag-twin-screw-extruder"],"_links":{"self":[{"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/posts\/1204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/comments?post=1204"}],"version-history":[{"count":2,"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/posts\/1204\/revisions"}],"predecessor-version":[{"id":1208,"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/posts\/1204\/revisions\/1208"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/media\/1205"}],"wp:attachment":[{"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/media?parent=1204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/categories?post=1204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/extruder-lab.com\/fr\/wp-json\/wp\/v2\/tags?post=1204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}