Salutare natiune! Stiti ce e un extruder? Este o masinarie in care - TopicsExpress

Salutare natiune! Stiti ce e un extruder? Este o masinarie in care se fac barele din alama. Eu am vazut live, la Metrom Brasov, acum cativa ani. Sa va explic. Extruderul asta e o presa imensa. Cu forta incepand de la 1000 de tone, pana la 3-4000 de tone. Inainte de toate, se toarna alama in niste cilindri imensi, care se numesc BALOTI. Un balot are cam 60cm lungime, si vreo 15 cm in diametru. Greutatea? Undeva pe la 100 kg. +/- Pentru a fi extrudat, balotul asta se incalzeste intr-un cuptor, pana la incandescenta. Dupa ce s-a incalzit, 2-3 tipi zdraveni, cu niste clesti babani, il apuca si-l introduc in presa. Cand am vazut cum opereaza oamenii aia, m-am ofilit. Parca se jucau, asa brand aveau! Apoi, balotul respectiv incepe sa fie impins de presa, cu forta de care va pomeneam, printr-o filiera. Filiera de 10-15-20 mm diametru. Depinde de ce se doreste. Filiera poate avea practic orice forma, cilindrica, patrata, hexagonala...Viteaza cu care tasneste bara din filiera, este incredibila. Si iaca-sa, dintr-un balot de 100 de kg, iese o bara de vreo 40 de metri liniari, cu profil rotund de 20 mm diametru! La Metrom presa vazuta de mine la lucru era de vreo 1500 de tone forta. La Laromet e mai mare! :D youtube/watch?v=9O_EBR4OX5c

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