{"id":5846,"date":"2020-09-22T12:46:16","date_gmt":"2020-09-22T12:46:16","guid":{"rendered":"https:\/\/psi-polymersystems.com\/?page_id=5846"},"modified":"2022-08-02T14:13:32","modified_gmt":"2022-08-02T14:13:32","slug":"psi-polymer-systems-inc-to-introduce-new-products-for-pvc-applications-at-npe2018-conover-nc-may-7-2018","status":"publish","type":"page","link":"https:\/\/www.psi-polymersystems.com\/fr\/about-us\/press-releases\/psi-polymer-systems-inc-to-introduce-new-products-for-pvc-applications-at-npe2018-conover-nc-may-7-2018\/","title":{"rendered":"PSI-Polymer Systems, Inc. pr\u00e9sentera de nouveaux produits pour les applications PVC \u00e0 NPE2018 Conover, NC (7 mai 2018)"},"content":{"rendered":"
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PSI-Polymer Systems, Inc. pr\u00e9sentera de nouveaux produits pour les applications PVC \u00e0 NPE2018 Conover, NC (7 mai 2018)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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PSI-Polymer Systems Inc. (stand W5791) pr\u00e9sentera deux nouveaux produits con\u00e7us pour les applications PVC au NPE2018. Le nouveau changeur de tamis et la pompe \u00e0 engrenages sont les tout premiers produits PSI de leurs types respectifs \u00e0 \u00eatre d\u00e9velopp\u00e9s sp\u00e9cifiquement pour le vinyle dur. Le PVC est un mat\u00e9riau particuli\u00e8rement difficile \u00e0 travailler en raison de sa fen\u00eatre de traitement \u00e9troite et de la n\u00e9cessit\u00e9 d'un flux constant et r\u00e9gulier, ce qui emp\u00eache de nombreux transformateurs de RPVC d'utiliser des changeurs de tamis ou des pompes \u00e0 engrenages. Les nouveaux produits de PSI \u00e9liminent les pr\u00e9occupations habituelles des transformateurs concernant l'inclusion de changeurs de tamis et de pompes \u00e0 engrenages dans leur processus.<\/p>

Changeur d'\u00e9cran \u00e0 plaque d'expansion (ESC)<\/u><\/p>

Les changeurs de tamis ne sont souvent pas appliqu\u00e9s aux processus RPVC, car lorsque le mat\u00e9riau traverse des transitions ou des \u00e9tapes, une chaleur de cisaillement est introduite et d\u00e9clenche souvent une combustion localis\u00e9e du mat\u00e9riau. PSI, cependant, a pu d\u00e9velopper une solution de contournement qui permet \u00e0 son changeur d'\u00e9cran \u00e0 plaque d'expansion (brevet d\u00e9pos\u00e9) de tol\u00e9rer des variations de temp\u00e9rature allant jusqu'\u00e0 20 \u00e0 40 \u00b0F.<\/p>

"Avec notre ESC, nous avons r\u00e9solu les probl\u00e8mes chimiques li\u00e9s \u00e0 la chaleur, au d\u00e9bit et \u00e0 la conductivit\u00e9 thermique qui rendent l'utilisation d'un changeur de tamis avec des formulations de PVC si difficile", d\u00e9clare Don Macnamara, directeur g\u00e9n\u00e9ral de PSI. "PSI r\u00e9sout des probl\u00e8mes de traitement difficiles depuis pr\u00e8s de 20 ans, mais nous sommes vraiment fiers de cette solution particuli\u00e8rement difficile."<\/p>

G\u00e9n\u00e9ralement utilis\u00e9 dans les applications de t\u00f4les et de profil\u00e9s, le changeur d'\u00e9cran n\u00e9cessite un arr\u00eat momentan\u00e9 pour un changement d'\u00e9cran, ce qui \u00e9limine le besoin de d\u00e9monter la matrice et les taux de rebut \u00e9lev\u00e9s qui en r\u00e9sultent, en particulier sur les petites s\u00e9ries. Le processus de changement d'\u00e9cran lui-m\u00eame est \u00e9galement con\u00e7u de mani\u00e8re experte, avec un contr\u00f4le PLC des barres d'espacement d'expansion qui s\u00e9parent les moiti\u00e9s du corps de la plaque coulissante entre elles. Une fois que l'\u00e9cran us\u00e9 a \u00e9t\u00e9 remplac\u00e9, les barres d'espacement se contractent, ramenant les moiti\u00e9s du corps en acier fermement contre la plaque coulissante, recr\u00e9ant un joint gr\u00e2ce \u00e0 un contact \u00e9troit acier sur acier. L'ESC est livr\u00e9 en standard avec des composants en acier inoxydable r\u00e9sistant \u00e0 la corrosion, des al\u00e9sages d'\u00e9coulement chrom\u00e9s pour r\u00e9duire le frottement de surface et \u00e9liminer les zones d'accrochage, des corps identiques, interchangeables et r\u00e9parables sur le terrain en amont et en aval pour une r\u00e9paration ou un remplacement facile, et z\u00e9ro joints m\u00e9caniques pour cr\u00e9er moins d'occasions pour que les choses tournent mal. Ces attributs rendent ce changeur d'\u00e9cran fiable, durable et efficace, en plus de sa capacit\u00e9 d\u00e9j\u00e0 impressionnante \u00e0 prosp\u00e9rer dans un processus extr\u00eamement difficile.<\/p>

Pompe \u00e0 engrenages chlor\u00e9s (CGP)<\/u><\/p>

Cependant, ce ne sont pas seulement les changeurs d'\u00e9cran qui ont tendance \u00e0 \u00eatre \u00e9vit\u00e9s pour les applications RPVC. Les pompes de fusion ne sont g\u00e9n\u00e9ralement pas utilis\u00e9es non plus en raison de la chaleur g\u00e9n\u00e9r\u00e9e dans les jeux axiaux des engrenages et les zones de lubrification des roulements. Aujourd'hui, de nombreuses pompes de fusion sont capables de d\u00e9charger des mat\u00e9riaux utilis\u00e9s pour la lubrification des engrenages et des roulements, mais ce faisant, elles chauffent g\u00e9n\u00e9ralement \u00e0 des temp\u00e9ratures inadapt\u00e9es aux mat\u00e9riaux thermosensibles tels que le RPVC. La nouvelle pompe \u00e0 engrenages chlor\u00e9e de PSI offre la solution.<\/p>

"Notre nouveau CGP est tr\u00e8s efficace pour g\u00e9rer le profil de temp\u00e9rature \u00e0 travers la pompe de fusion, ce qui est si critique pour le PVC." dit Macnamara. "Il a fallu un travail acharn\u00e9 et plusieurs modifications, mais notre produit permettra d\u00e9sormais \u00e0 nos clients utilisant un polym\u00e8re thermosensible de profiter de la stabilisation de la pression de la matrice, de l'augmentation du rendement et de la r\u00e9duction des avantages de la pression de l'extrudeuse d'une pompe \u00e0 engrenages sans se soucier que leur polym\u00e8re va se carboniser ou se d\u00e9grader \u00e0 cause de cela.<\/p>

La nouvelle conception a modifi\u00e9 plusieurs composants pour am\u00e9liorer le transfert de chaleur et contr\u00f4ler plus \u00e9troitement les changements de temp\u00e9rature typiques d'une pompe \u00e0 engrenages. Le corps et les plaques lat\u00e9rales du CGP sont chemis\u00e9s pour les fluides caloporteurs \u00e0 vapeur ou \u00e0 huile, qui traversent toute la pompe en un seul passage. Pour aider \u00e0 \u00e9vacuer la chaleur des zones de charge \u00e9lev\u00e9e des engrenages, le CGP a deux arbres d'engrenage prolong\u00e9s qui aident \u00e0 transf\u00e9rer la chaleur vers l'ext\u00e9rieur des tourillons de roulement dans les tourillons de joint plus frais, puis \u00e0 travers les joints dans les plaques lat\u00e9rales gain\u00e9es. Pour une conductivit\u00e9 optimale, tous les joints sont contenus \u00e0 l'int\u00e9rieur et font partie int\u00e9grante des plaques lat\u00e9rales. Pour un meilleur contr\u00f4le de la chaleur, des canaux de refroidissement sont plac\u00e9s dans le corps pour \u00e9vacuer la chaleur des diam\u00e8tres ext\u00e9rieurs des roulements et de grandes plaques lat\u00e9rales gain\u00e9es aident \u00e0 fournir un transfert de chaleur suppl\u00e9mentaire des roulements. Le mat\u00e9riau de purge utilis\u00e9 pour la lubrification des roulements et des engrenages est \u00e9vacu\u00e9 du flux de processus via des orifices internes vers l'ext\u00e9rieur de la pompe dans une purge constante (environ 0,01% de d\u00e9bit).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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PSI-Polymer Systems, Inc. pr\u00e9sentera de nouveaux produits pour les applications PVC au NPE2018 Conover, NC (7 mai 2018) PSI-Polymer Systems Inc. (stand W5791) pr\u00e9sentera deux nouveaux produits con\u00e7us pour les applications PVC au NPE2018. Le nouveau changeur de tamis et la pompe \u00e0 engrenages sont les tout premiers produits PSI de leurs types respectifs \u00e0 \u00eatre d\u00e9velopp\u00e9s sp\u00e9cifiquement pour le vinyle dur. [\u2026]<\/p>","protected":false},"author":2,"featured_media":0,"parent":5833,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-5846","page","type-page","status-publish","hentry"],"yoast_head":"\nPSI-Polymer Systems, Inc. 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