{"id":2276,"date":"2025-09-17T17:51:13","date_gmt":"2025-09-17T15:51:13","guid":{"rendered":"https:\/\/pro-cut.pl\/?p=2276"},"modified":"2026-05-31T14:22:18","modified_gmt":"2026-05-31T12:22:18","slug":"princip-fungovani-rezacky-na-polystyren","status":"publish","type":"post","link":"https:\/\/pro-cut.pl\/cs\/princip-fungovani-rezacky-na-polystyren\/","title":{"rendered":"Princip \u010dinnosti \u0159eza\u010dky p\u011bnov\u00e9ho polystyrenu"},"content":{"rendered":"
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\u0158eza\u010dka na polystyren s odporov\u00fdm dr\u00e1tem funguje na principu elektrick\u00e9ho odporu \u2014 dr\u00e1t NiCr 80-20 se zah\u0159eje na teplotu 250\u2013400\u00b0C b\u011bhem 1\u20132 sekund od zapnut\u00ed nap\u00e1jen\u00ed a roztav\u00ed polystyren pod\u00e9l \u0159ezn\u00e9 linie bez prachu, saze a ot\u0159ep\u016f. Pr\u00e1v\u011b d\u00edky t\u00e9to p\u0159esnosti a \u010distot\u011b \u0159ezu jsou za\u0159\u00edzen\u00ed s odporov\u00fdm dr\u00e1tem standardem ve stavebnictv\u00ed a v odv\u011btv\u00ed tepeln\u00e9 izolace.<\/strong><\/p>\n

V tomto \u010dl\u00e1nku najdete kompletn\u00ed technick\u00fd popis: princip fungov\u00e1n\u00ed, typy a parametry odporov\u00fdch dr\u00e1t\u016f, zp\u016fsob v\u00fdb\u011bru tlou\u0161\u0165ky a v\u00fdkonu nap\u00e1jec\u00edho zdroje, konstrukci \u0159eza\u010dky a z\u00e1sady bezpe\u010dn\u00e9 pr\u00e1ce.<\/span>.<\/strong><\/p>\n

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Jak funguje \u0159eza\u010dka na polystyren s op\u011brn\u00fdm dr\u00e1tem?<\/span><\/h2>

\u0158eza\u010dka s odporov\u00fdm dr\u00e1tem \u0159e\u017ee polystyren (EPS), styrodur (XPS) a p\u011bny PIR\/PUR na principu Jouleova jevu \u2013 dr\u00e1t NiCr 80-20 (80% niklu, 20% chromu) s m\u011brn\u00fdm odporem 1,09 \u03a9\u00b7mm\u00b2\/m p\u0159em\u011b\u0148uje elektrickou energii na teplo. P\u0159i pr\u016fchodu proudu se dr\u00e1t zah\u0159eje na pracovn\u00ed teplotu 250\u2013400 \u00b0C b\u011bhem 1\u20132 sekund a kontakt s materi\u00e1lem zp\u016fsob\u00ed jeho lok\u00e1ln\u00ed roztaven\u00ed a p\u0159esn\u00fd \u0159ez.<\/p>

V\u00fdsledek: hladk\u00e1, rovn\u00e1 hrana bez mechanick\u00e9ho po\u0161kozen\u00ed struktury polystyrenu, bez EPS prachu a bez hluku typick\u00e9ho pro \u0159ez\u00e1n\u00ed pilou nebo no\u017eem.<\/p>

Kl\u00ed\u010dov\u00e9 provozn\u00ed parametry:<\/strong>
Provozn\u00ed teplota dr\u00e1tu NiCr 80-20: 250\u2013400 \u00b0C<\/strong>  | Doba zah\u0159\u00edv\u00e1n\u00ed: 1\u20132 sekundy<\/strong>  | Funk\u010dnost elektrick\u00e9ho syst\u00e9mu: 60\u201370%<\/strong><\/div>

\u0158eza\u010dky p\u011bnov\u00e9ho polystyrenu<\/a> Za\u0159\u00edzen\u00ed dostupn\u00e1 v nab\u00eddce Pro-Cut (zna\u010dky Minova a Procut) jsou vybavena elektronick\u00fdm regul\u00e1torem v\u00fdkonu, kter\u00fd umo\u017e\u0148uje plynul\u00e9 nastaven\u00ed teploty dr\u00e1tu v rozmez\u00ed p\u0159izp\u016fsoben\u00e9m tlou\u0161\u0165ce a druhu \u0159ezan\u00e9ho materi\u00e1lu. Odporov\u00fd dr\u00e1t NiCr 80-20<\/a> V \u0159ezac\u00edch stroj\u00edch Minova Pro se pou\u017e\u00edv\u00e1 profesion\u00e1ln\u00ed nichromov\u00e1 slitina, kter\u00e1 zaji\u0161\u0165uje stabiln\u00ed teplotu i p\u0159i intenzivn\u00edm a dlouhodob\u00e9m pou\u017e\u00edv\u00e1n\u00ed.<\/p>

Odporov\u00fd dr\u00e1t \u2013 druhy, vlastnosti a srovn\u00e1n\u00ed slitin<\/h2>

Nej\u010dast\u011bji pou\u017e\u00edvan\u00fdmi odporov\u00fdmi dr\u00e1ty pro \u0159ez\u00e1n\u00ed polystyrenu a izola\u010dn\u00edch materi\u00e1l\u016f jsou slitina NiCr 80-20 (nichrom) a kanthal A1. Li\u0161\u00ed se maxim\u00e1ln\u00ed teplotou, odporem a \u00fa\u010delem pou\u017eit\u00ed \u2014 n\u00ed\u017ee je uvedena srovn\u00e1vac\u00ed tabulka:<\/p>
Stop<\/th>Slo\u017een\u00ed<\/th>Max. teplota.<\/th>M\u011brn\u00fd odpor (\u03a9\u00b7mm\u00b2\/m)<\/th>Aplikace<\/th><\/tr><\/thead>
NiCr 80-20<\/strong> (nichrom)<\/td>80% Ni, 20% Cr<\/td>1200 \u00b0C<\/td>1,09<\/td>EPS, XPS \u2014 standardn\u00ed rozm\u011bry stavebn\u00ed izolace<\/td><\/tr>
Kanthal A1<\/strong><\/td>Fe-Cr-Al<\/td>1400 \u00b0C<\/td>1,39<\/td>PIR\/PUR, hust\u00e9 p\u011bny, pr\u016fmyslov\u00e9 aplikace<\/td><\/tr>
Inconel 600<\/strong><\/td>Ni-Cr-Fe<\/td>1000 \u00b0C<\/td>1,03<\/td>P\u0159esn\u00e9 EPS, modely a prototypy<\/td><\/tr><\/tbody><\/table>

K \u0159ez\u00e1n\u00ed EPS a XPS na stavb\u011b doporu\u010dujeme dr\u00e1t NiCr 80-20<\/strong> \u2014 jedn\u00e1 se o nejdostupn\u011bj\u0161\u00ed a osv\u011bd\u010denou slitinu, odolnou v\u016f\u010di opakovan\u00e9mu zah\u0159\u00edv\u00e1n\u00ed a ochlazov\u00e1n\u00ed v podm\u00ednk\u00e1ch ka\u017edodenn\u00edho provozu. Kanthal pou\u017e\u00edvejte u materi\u00e1l\u016f vy\u017eaduj\u00edc\u00edch vy\u0161\u0161\u00ed \u0159ezac\u00ed teplotu (PIR\/PUR, styrodur s hustotou nad 35 kg\/m\u00b3).<\/p>

Vlastnosti kvalitn\u00edho odporov\u00e9ho dr\u00e1tu pro \u0159ez\u00e1n\u00ed polystyrenu:<\/p>