{"id":22155,"date":"2020-11-13T10:22:34","date_gmt":"2020-11-13T10:22:34","guid":{"rendered":"http:\/\/pokus.jansvoboda.cz\/?p=22155"},"modified":"2020-11-26T14:19:09","modified_gmt":"2020-11-26T14:19:09","slug":"prinos-dynamickych-ventilu-pro-odvzdusneni-formy","status":"publish","type":"post","link":"https:\/\/kvalitnivystrik.cz\/index.php\/2020\/11\/13\/prinos-dynamickych-ventilu-pro-odvzdusneni-formy\/","title":{"rendered":"P\u0159\u00ednos dynamick\u00fdch ventil\u016f pro odvzdu\u0161n\u011bn\u00ed formy"},"content":{"rendered":"\n<h6>P\u0159\u00ednos dynamick\u00fdch ventil\u016f pro odvzdu\u0161n\u011bn\u00ed formy<\/h6>\n\n\n\n<p>Slab\u00e9 odvzdu\u0161n\u011bn\u00ed formy negativn\u011b ovliv\u0148uje jak esteti\u010dnost a funk\u010dnost v\u00fdrobk\u016f, tak i \u017eivotnost n\u00e1stroje, proto\u017ee zachycen\u00e9 plyny p\u0159i vysok\u00fdch teplot\u00e1ch nalept\u00e1vaj\u00ed ocel. Odvzdu\u0161\u0148ovac\u00ed kan\u00e1lky se b\u011bhem provozu postupn\u011b zan\u00e1\u0161ej\u00ed a mohou se po ur\u010dit\u00e9 dob\u011b ucpat. Obecn\u011b plat\u00ed, \u017ee pravideln\u00fdm \u010di\u0161t\u011bn\u00edm odvzdu\u0161\u0148ovac\u00edch kan\u00e1lk\u016f se chr\u00e1n\u00ed forma a udr\u017euje se st\u00e1l\u00e1 kvalita vyroben\u00fdch d\u00edl\u016f.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.jansvoboda.cz\/SGD-ventil-c61201\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Dynamick\u00fd odvzdu\u0161\u0148ovac\u00ed ventil SGD<\/strong><\/a>&nbsp;p\u0159edstavuje inovativn\u00ed \u0159e\u0161en\u00ed pro eliminaci pot\u00ed\u017e\u00ed spojen\u00fdch s nedostate\u010dn\u00fdm odvzdu\u0161n\u011bn\u00edm dutin (jedn\u00e1 se o tzv. \u201ediesel efekt\u201c). Ventil je zalo\u017een na&nbsp;<strong>jednoduch\u00e9m mechanick\u00e9m principu<\/strong>, d\u00edky n\u011bmu\u017e m\u016f\u017ee&nbsp;<strong>plyn uniknout z dutiny, zat\u00edmco \u00faniku plastu br\u00e1n\u00ed automatick\u00e9 uzav\u0159en\u00ed ventilu tlakem prot\u00e9kaj\u00edc\u00ed taveniny.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/www.jansvoboda.cz\/images\/else_images\/106055.png\" alt=\"\"\/><\/figure>\n\n\n\n<p><strong>Co pro V\u00e1s znamen\u00e1 1 vte\u0159ina?<\/strong><\/p>\n\n\n\n<p>Pod\u00edvejme se, jak\u00e1 je ekonomick\u00e1 n\u00e1vratnost ventilu SGDE, pokud tento ventil umo\u017en\u00ed zkr\u00e1tit vst\u0159ikovac\u00ed cyklus o 1 vte\u0159inu p\u0159i objemu produkce 400 000 ks\/rok.<\/p>\n\n\n\n<ul><li>Ro\u010dn\u011b tedy u\u0161et\u0159\u00edme&nbsp;<strong>400 000 vte\u0159in<\/strong>.&nbsp;<\/li><li>V p\u0159epo\u010dtu na hodiny se jedn\u00e1 o&nbsp;<strong>111 hodin<\/strong>.&nbsp;<\/li><li>To je&nbsp;<strong>14 pracovn\u00edch sm\u011bn po 8 hodin\u00e1ch,<\/strong>&nbsp;nebo t\u00e9m\u011b\u0159&nbsp;<strong>5 dn\u00ed t\u0159\u00edsm\u011bnn\u00e9ho provozu<\/strong>.&nbsp;<\/li><\/ul>\n\n\n\n<p><strong>Zkr\u00e1cen\u00ed cyklu o 1 vte\u0159inu v\u00e1m tedy u\u0161et\u0159\u00ed cel\u00fd jeden t\u00fdden \u010dasu.&nbsp;<\/strong><\/p>\n\n\n\n<p>P\u0159i cen\u011b 600,-K\u010d \/ hodina stroje to \u00faspora cca 66 600 K\u010d, tedy 2 878 EUR. P\u0159i investici cca 350 EUR tedy ro\u010dn\u00ed zisk p\u0159edstavuje&nbsp;2 527 EUR.<\/p>\n\n\n\n<p>V\u00fdsledek v&nbsp;CZK p\u0159i kurzu 27,-K\u010d\/1 EUR:<strong>&nbsp;investice 9 450 K\u010d znamen\u00e1 \u00fasporu 68 229 K\u010d<\/strong><\/p>\n\n\n\n<p><strong>Princip odvzdu\u0161\u0148ovac\u00edho ventilu:<\/strong><br>Vnit\u0159n\u00ed geometrie&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/www.jansvoboda.cz\/SGD-ventil-c61201\" target=\"_blank\"><strong>SGD ventilu<\/strong><\/a>&nbsp;vytv\u00e1\u0159\u00ed kruhovou&nbsp;<strong>dr\u00e1\u017eku pro odvod vzduchu<\/strong>&nbsp;mezi centr\u00e1ln\u00edm \u010depem a kluzn\u00fdm prvkem ventilu. P\u0159i odvodu vzduchu zde doch\u00e1z\u00ed k&nbsp;aktivn\u00edmu vytv\u00e1\u0159en\u00ed podtlaku a t\u00edm i k aktivn\u00edmu odvodu vzduchu z dutiny. Rychlost ods\u00e1v\u00e1n\u00ed vzduchu a hloubka takto vytvo\u0159en\u00e9ho podtlaku je funkc\u00ed rychlosti vst\u0159ikov\u00e1n\u00ed a objemu vzduchu v&nbsp;dutin\u011b formy (v\u010detn\u011b studen\u00fdch kan\u00e1l\u016f).<\/p>\n\n\n\n<p><a href=\"https:\/\/www.jansvoboda.cz\/Ecovent-c43001\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>U ventilu Ecovent<\/strong><\/a>&nbsp;jsou tyto dr\u00e1\u017eky dv\u011b, a to mezi t\u011blem ventilu a zav\u00edrac\u00edm \u010dlenem.<\/p>\n\n\n\n<p>Vzduch je tedy z dutiny aktivn\u011b ods\u00e1v\u00e1n a\u017e do chv\u00edle, kdy se \u010delo taveniny dostane k ventilu. Jakmile \u010delo taveniny nate\u010de na uzav\u00edrac\u00ed \u010dlen, tlak toku taveniny p\u0159ekon\u00e1 s\u00edlu vnit\u0159n\u00ed pru\u017einy a bezpe\u010dn\u011b uzav\u0159e vzduchov\u00fd odv\u00e1d\u011bc\u00ed kan\u00e1l d\u0159\u00edve, ne\u017e plast napln\u00ed bezpe\u010dnostn\u00ed z\u00f3nu. Vzduch je p\u0159es t\u011blo ventilu odv\u00e1d\u011bn do dr\u00e1\u017eky, kter\u00e1 je vyvedena a\u017e na okraj formy.&nbsp;<\/p>\n\n\n\n<p>Na obr\u00e1zku n\u00ed\u017ee jsou odv\u00e1d\u011bn\u00e9 zplodiny viditeln\u00e9 i pouh\u00fdm okem.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/www.jansvoboda.cz\/images\/else_images\/106056.png\" alt=\"\"\/><\/figure>\n\n\n\n<p><strong><a rel=\"noreferrer noopener\" href=\"https:\/\/www.youtube.com\/watch?v=U1fB1437IK8\" target=\"_blank\">Video s odfukem zplodin si m\u016f\u017eete prohl\u00e9dnout zde<\/a>&nbsp;<\/strong>(6. &#8211; 10. vte\u0159ina)&nbsp;<\/p>\n\n\n\n<p><strong>Odvod zplodin m\u00e1 dv\u011b f\u00e1ze:<\/strong><\/p>\n\n\n\n<ol><li>PRIM\u00c1RN\u00cd: V prvn\u00ed f\u00e1zi je z dutiny odveden atmosf\u00e9rick\u00fd tlak a oh\u0159\u00e1t\u00fd vzduch v d\u016fsledku prvn\u00edho n\u00e1razu taveniny, kter\u00e1 p\u0159ed sebou tla\u010d\u00ed vzduch.&nbsp;<\/li><li>SEKUND\u00c1RN\u00cd: Ve druh\u00e9 f\u00e1zi se ji\u017e d\u00edky hydrodynamick\u00e9mu paradoxu nastartuje ods\u00e1vac\u00ed efekt a z dutiny jsou ods\u00e1v\u00e1ny zplodiny ze vst\u0159ikovan\u00e9ho materi\u00e1lu. Tato druh\u00e1 f\u00e1ze intenzivn\u011b zlep\u0161uje odvzdu\u0161n\u011bn\u00ed, zlep\u0161uje kvalitu v\u00fdrobku a aktivn\u011b prodlu\u017euje interval \u00fadr\u017eby n\u00e1stroje.&nbsp;<\/li><\/ol>\n\n\n\n<p>P\u0159\u00ednos dynamick\u00fdch odvzdu\u0161\u0148ovac\u00edch ventil\u016f lze tedy shrnout do n\u00e1sleduj\u00edc\u00edch bod\u016f:<\/p>\n\n\n\n<ul><li>zamezen\u00ed diesel efektu,<\/li><li>zlep\u0161en\u00ed kvality v\u00fdst\u0159iku,<\/li><li>sn\u00ed\u017een\u00ed zmetkovitosti,<\/li><li>zkr\u00e1cen\u00ed vst\u0159ikovac\u00edho cyklu, a&nbsp;<\/li><li>prodlou\u017een\u00ed intervalu \u00fadr\u017eby.&nbsp;<\/li><\/ul>\n\n\n\n<p><strong>Teoretick\u00fd rozbor hydrodynamick\u00e9ho paradoxu<\/strong><\/p>\n\n\n\n<p><strong>Venturiho efekt<\/strong>&nbsp;(nebo tak\u00e9 hydrodynamick\u00fd \u010di aerodynamick\u00fd paradox) je jev pojmenovan\u00fd po italsk\u00e9m fyziku&nbsp;Giovannim Battistovi Venturim&nbsp;(1746\u20131822).&nbsp;<strong>Vych\u00e1z\u00ed ze skute\u010dnosti, \u017ee&nbsp;tlak&nbsp;v proud\u00edc\u00ed tekutin\u011b je nep\u0159\u00edmo \u00fam\u011brn\u00fd rychlosti proud\u011bn\u00ed&nbsp;tekutiny.<\/strong><\/p>\n\n\n\n<p><em>Zaj\u00edmavost: Nap\u0159. podvozky monopost\u016f&nbsp;Formule 1&nbsp;jsou konstruov\u00e1ny tak, aby pod nimi doch\u00e1zelo k zes\u00edlen\u00ed Venturiho efektu. Vzduch se pod podvozkem urychluje, vznik\u00e1&nbsp;podtlak, kter\u00fd p\u0159itla\u010duje automobil k vozovce (p\u0159\u00edtlak), co\u017e zvy\u0161uje stabilitu vozu.<\/em><\/p>\n\n\n\n<p>Tomuto jevu se \u0159\u00edk\u00e1&nbsp;hydrodynamick\u00fd paradox&nbsp;(hydrodynamick\u00e9 paradoxon) a vyu\u017e\u00edv\u00e1 se ho nap\u0159\u00edklad u&nbsp;rozpra\u0161ova\u010d\u016f, nat\u011bra\u010dsk\u00fdch st\u0159\u00edkac\u00edch pistol\u00ed \u010di ejektor\u016f,&nbsp;nebo v&nbsp;karbur\u00e1toru.<\/p>\n\n\n\n<p><em>POKUS: Vezm\u011bte dva listy pap\u00edru a prudce mezi n\u011b foukn\u011bte. Pap\u00edry se prudce p\u0159ibl\u00ed\u017e\u00ed k sob\u011b. Vysv\u011btlen\u00ed: Rychlost proud\u011bn\u00ed vzduchu mezi pap\u00edry sn\u00ed\u017eila tlak mezi nimi a listy byly \u201cp\u0159itla\u010deny\u201d k sob\u011b atmosf\u00e9rick\u00fdm tlakem okol\u00ed.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>P\u0159\u00ednos dynamick\u00fdch ventil\u016f pro odvzdu\u0161n\u011bn\u00ed formy Slab\u00e9 odvzdu\u0161n\u011bn\u00ed formy negativn\u011b ovliv\u0148uje jak esteti\u010dnost a funk\u010dnost v\u00fdrobk\u016f, tak i \u017eivotnost n\u00e1stroje, proto\u017ee zachycen\u00e9 plyny p\u0159i vysok\u00fdch teplot\u00e1ch nalept\u00e1vaj\u00ed ocel. Odvzdu\u0161\u0148ovac\u00ed kan\u00e1lky se b\u011bhem provozu postupn\u011b zan\u00e1\u0161ej\u00ed a mohou se po ur\u010dit\u00e9 dob\u011b ucpat. Obecn\u011b plat\u00ed, \u017ee pravideln\u00fdm \u010di\u0161t\u011bn\u00edm odvzdu\u0161\u0148ovac\u00edch kan\u00e1lk\u016f se chr\u00e1n\u00ed forma a udr\u017euje se st\u00e1l\u00e1 kvalita vyroben\u00fdch d\u00edl\u016f. Dynamick\u00fd odvzdu\u0161\u0148ovac\u00ed ventil SGD&nbsp;p\u0159edstavuje inovativn\u00ed \u0159e\u0161en\u00ed pro eliminaci pot\u00ed\u017e\u00ed spojen\u00fdch s nedostate\u010dn\u00fdm odvzdu\u0161n\u011bn\u00edm dutin (jedn\u00e1 se o tzv. \u201ediesel efekt\u201c). Ventil je zalo\u017een na&nbsp;jednoduch\u00e9m mechanick\u00e9m principu, d\u00edky n\u011bmu\u017e m\u016f\u017ee&nbsp;plyn uniknout z dutiny, zat\u00edmco \u00faniku plastu br\u00e1n\u00ed automatick\u00e9 uzav\u0159en\u00ed ventilu tlakem prot\u00e9kaj\u00edc\u00ed taveniny. Co pro V\u00e1s znamen\u00e1 1 vte\u0159ina? Pod\u00edvejme se, jak\u00e1 je ekonomick\u00e1 n\u00e1vratnost ventilu SGDE, pokud tento ventil umo\u017en\u00ed zkr\u00e1tit vst\u0159ikovac\u00ed cyklus o 1 vte\u0159inu p\u0159i objemu produkce 400 000 ks\/rok. Ro\u010dn\u011b tedy u\u0161et\u0159\u00edme&nbsp;400 000 vte\u0159in.&nbsp; V p\u0159epo\u010dtu na hodiny se jedn\u00e1 o&nbsp;111 hodin.&nbsp; To je&nbsp;14 pracovn\u00edch sm\u011bn po 8 hodin\u00e1ch,&nbsp;nebo t\u00e9m\u011b\u0159&nbsp;5 dn\u00ed t\u0159\u00edsm\u011bnn\u00e9ho provozu.&nbsp; Zkr\u00e1cen\u00ed cyklu o 1 vte\u0159inu v\u00e1m tedy u\u0161et\u0159\u00ed cel\u00fd jeden t\u00fdden \u010dasu.&nbsp; P\u0159i cen\u011b 600,-K\u010d \/ hodina stroje to \u00faspora cca 66 600 K\u010d, tedy 2 878 EUR. P\u0159i investici cca 350 EUR tedy ro\u010dn\u00ed zisk p\u0159edstavuje&nbsp;2 527 EUR. V\u00fdsledek v&nbsp;CZK p\u0159i kurzu 27,-K\u010d\/1 EUR:&nbsp;investice&#8230;<\/p>\n","protected":false},"author":1,"featured_media":22156,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[61,64,41],"tags":[63,60,50,49],"_links":{"self":[{"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/posts\/22155"}],"collection":[{"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/comments?post=22155"}],"version-history":[{"count":4,"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/posts\/22155\/revisions"}],"predecessor-version":[{"id":22495,"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/posts\/22155\/revisions\/22495"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/media\/22156"}],"wp:attachment":[{"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/media?parent=22155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/categories?post=22155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kvalitnivystrik.cz\/index.php\/wp-json\/wp\/v2\/tags?post=22155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}