{"id":1369,"date":"2025-08-06T03:36:59","date_gmt":"2025-08-06T03:36:59","guid":{"rendered":"https:\/\/www.dartdroptest.com\/?p=1369"},"modified":"2025-08-07T06:47:46","modified_gmt":"2025-08-07T06:47:46","slug":"dart-drop-impact-test","status":"publish","type":"post","link":"https:\/\/www.dartdroptest.com\/lt\/dart-drop-impact-test\/","title":{"rendered":"\u0160autuvo kritimo sm\u016bgio bandymas: Pagrindiniai \u017eingsniai ir standartai"},"content":{"rendered":"<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-7387b849 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:40% auto\"><figure class=\"wp-block-media-text__media\"><a href=\"https:\/\/www.dartdroptest.com\/lt\/\"><img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"750\" src=\"https:\/\/www.dartdroptest.com\/wp-content\/uploads\/2025\/08\/dart-drop-impact-test.webp\" alt=\"str\u0117l\u0117s kritimo sm\u016bgio bandymas\" class=\"wp-image-1371 size-full\" srcset=\"https:\/\/www.dartdroptest.com\/wp-content\/uploads\/2025\/08\/dart-drop-impact-test.webp 750w, https:\/\/www.dartdroptest.com\/wp-content\/uploads\/2025\/08\/dart-drop-impact-test-300x300.webp 300w, https:\/\/www.dartdroptest.com\/wp-content\/uploads\/2025\/08\/dart-drop-impact-test-150x150.webp 150w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/a><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\">Svetain\u0117 <strong>str\u0117l\u0117s kritimo sm\u016bgio bandymas<\/strong> yra esminis metodas, naudojamas plastiko pl\u0117veli\u0173 atsparumui sm\u016bgiams nustatyti tam tikromis s\u0105lygomis. Pagal ASTM D1709 standart\u0105 \u0161is bandymas matuoja energij\u0105, reikaling\u0105 pl\u0117vel\u0117s pa\u017eeidimui sukelti, kai ji veikiamas laisvai krintan\u010dio str\u0117lyt\u0117s sm\u016bgio. Jis da\u017eniausiai naudojamas pl\u0117veli\u0173, naudojam\u0173 pakavimo, medicinos prietais\u0173 ir kitose pramon\u0117s \u0161akose, kuriose med\u017eiagos vientisumas yra itin svarbus, patvarumui \u012fvertinti.<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u0160iame straipsnyje aptarsime, kaip <strong>\u201eDart\u201c sm\u016bgio bandymo standartas<\/strong> (<a href=\"https:\/\/store.astm.org\/d1709-22.html\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/store.astm.org\/d1709-22.html\" rel=\"noreferrer noopener\">ASTM D1709<\/a>), \u012fvairius bandymo metodus ir kaip pasirinkti j\u016bs\u0173 bandym\u0173 poreikiams tinkam\u0105 \u012frang\u0105. Jei norite u\u017etikrinti, kad j\u016bs\u0173 plastikin\u0117s pl\u0117vel\u0117s atitikt\u0173 pramon\u0117s standartus, \u0161iame vadove rasite svarbiausi\u0105 informacij\u0105 apie tai, kaip tiksliai atlikti sm\u016bgin\u012f bandym\u0105 su krintan\u010diu str\u0117liuku.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u201eDart Drop\u201c sm\u016bgio bandymo tikslas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pagrindinis \u0161io <strong>str\u0117l\u0117s kritimo sm\u016bgio bandymas<\/strong> \u2013 i\u0161matuoti energij\u0105, reikaling\u0105 plastikin\u0117s pl\u0117vel\u0117s pa\u017eeidimui sukelti. Bandyme naudojamas nustatyto skersmens ir mas\u0117s str\u0117l\u0117, kuri i\u0161 nustatyto auk\u0161\u010dio numetama ant \u012ftvirtinto bandinio. Tikslas \u2013 nustatyti ta\u0161k\u0105, kuriame 50% bandini\u0173 pa\u017eeid\u017eiami sm\u016bgio metu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0160is bandymo metodas yra itin svarbus pramon\u0117s \u0161akose, susijusiose su plonomis plastikin\u0117mis pl\u0117vel\u0117mis, \u012fskaitant maisto produkt\u0173 pakavim\u0105, medicinos prietaisus ir kitas sritis, kuriose atsparumas sm\u016bgiams yra lemiamas veiksnys.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u201eDart\u201c sm\u016bgio bandymo standartas: ASTM D1709<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Svetain\u0117 <strong>\u201eDart\u201c sm\u016bgio bandymo standartas<\/strong>, apra\u0161ytas standarte ASTM D1709, numato du bandymo metodus: A bandymo metod\u0105 ir B bandymo metod\u0105. Abu metodai taikomi siekiant nustatyti energij\u0105, reikaling\u0105, kad bandiniai, kuri\u0173 sud\u0117tis yra 50%, sul\u016b\u017et\u0173, ta\u010diau jie skiriasi naudojamo str\u0117lyt\u0117s parametr\u0173 ir bandymo s\u0105lyg\u0173 at\u017evilgiu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">A bandymo metodas<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Darto skersmuo: 38,10 \u00b1 0,13 mm (1,500 \u00b1 0,005 colio)<\/li>\n\n\n\n<li>Kritimo auk\u0161tis: 0,66 \u00b1 0,01 m (26,0 \u00b1 0,4 colio)<\/li>\n\n\n\n<li>Tinka sm\u016bgiams atsparioms pl\u0117vel\u0117ms, kuri\u0173 mas\u0117 turi b\u016bti nuo ma\u017edaug 50 g iki 6 kg.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Bandymo metodas B<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Darto skersmuo: 50,80 \u00b1 0,13 mm (2,000 \u00b1 0,005 colio)<\/li>\n\n\n\n<li>Kritimo auk\u0161tis: 1,52 \u00b1 0,03 m (60,0 \u00b1 0,25, \u2013 1,70 coli\u0173)<\/li>\n\n\n\n<li>Tinka sm\u016bgiams atsparioms pl\u0117vel\u0117ms, kuri\u0173 mas\u0117 turi b\u016bti nuo ma\u017edaug 0,3 kg iki 6 kg.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Abu metodai skirti nustatyti raketos svor\u012f, kai bandiniai 50% sugenda, ta\u010diau metodo pasirinkimas priklauso nuo tiriamos med\u017eiagos tipo ir numatomo atsparumo sm\u016bgiams.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Krentan\u010dio str\u0117lyt\u0117s sm\u016bgio bandymo \u012frenginys, skirtas plastikin\u0117ms pl\u0117vel\u0117ms ir lak\u0161tams. A metodas ir B metodas. ASTM D1709, ISO 7765-1\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/a3_9M0x3w7U?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u201eDart Drop\u201c sm\u016bgio bandymo proced\u016bra<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tyrimo atlikimo tvarka <strong>str\u0117l\u0117s kritimo sm\u016bgio bandymas<\/strong> apima kelet\u0105 svarbi\u0173 etap\u0173, skirt\u0173 u\u017etikrinti rezultat\u0173 tikslum\u0105 ir patikimum\u0105:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u012erangos nustatymas:<\/strong><br>Prie\u0161 prad\u0117dami bandym\u0105, \u012fsitikinkite, kad str\u0117li\u0173 i\u0161metimo mechanizmas yra tinkamai sureguliuotas. Pasirinkite tinkamo dyd\u017eio str\u0117les ir nustatykite i\u0161metimo auk\u0161t\u012f pagal taikom\u0105 metod\u0105.<\/li>\n\n\n\n<li><strong>M\u0117gini\u0173 paruo\u0161imas:<\/strong><br>M\u0117ginys neturi tur\u0117ti joki\u0173 defekt\u0173, pavyzd\u017eiui, rauk\u0161li\u0173, sulenkim\u0173 ar ma\u017e\u0173 skylu\u010di\u0173. M\u0117ginys turi b\u016bti tvirtai pritvirtintas, kad bandymo metu neslyst\u0173.<\/li>\n\n\n\n<li><strong>Testo vykdymas:<\/strong><br>I\u0161\u0161aukite str\u0117l\u0119 ir steb\u0117kite, ar bandinys sugenda susid\u016brimo metu. U\u017efiksuokite, ar kiekvienas bandinys i\u0161laik\u0117 bandym\u0105, ar ne, ir, remdamiesi rezultatais, atitinkamai pakoreguokite sviedinio svor\u012f.<\/li>\n\n\n\n<li><strong>Duomen\u0173 rinkimas:<\/strong><br>Atlikus bandymus, u\u017era\u0161ykite gedim\u0173 skai\u010di\u0173 kiekvienam raketos svoriui. Galutinis sm\u016bginio gedimo svoris nustatomas apskai\u010diuojant svor\u012f, atitinkant\u012f 50% gedim\u0173 da\u017en\u012f.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Kod\u0117l verta rinktis <a href=\"http:\/\/www.dartdroptest.com\/lt\/\" data-type=\"link\" data-id=\"www.dartdroptest.com\">Cell Instruments<\/a> \u201eDart\u201c sm\u016bgio bandymo \u012frenginys (FDT-01)?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Norint gauti tikslius ir patikimus rezultatus, rekomenduojame naudoti <strong>Krentan\u010dio str\u0117lyt\u0117s sm\u016bgio bandymo \u012frenginys FDT-01<\/strong> i\u0161 Cell Instruments. \u0160is bandymo \u012frenginys suprojektuotas taip, kad atitikt\u0173 ASTM D1709 standart\u0105, ir u\u017etikrina tiksl\u0173 str\u0117l\u0117s svorio, kritimo auk\u0161\u010dio bei bandymo s\u0105lyg\u0173 valdym\u0105. D\u0117l paprasto nustatymo ir puikiai atkartojam\u0173 rezultat\u0173 FDT-01 yra puikus pasirinkimas laboratorijoms ir kokyb\u0117s kontrol\u0117s komandoms, atliekan\u010dioms plastiko pl\u0117veli\u0173 bandymus, ypa\u010d pakavimo ir kitose svarbiose pramon\u0117s \u0161akose.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Geriausios \u201eDart Drop\u201c sm\u016bgio bandym\u0173 praktikos<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>M\u0117ginio paruo\u0161imas:<\/strong> Prie\u0161 atliekant bandymus, bandinius visada kondicionuokite 23 \u00b1 2 \u00b0C (73,4 \u00b1 3,6 \u00b0F) temperat\u016broje ir 50 \u00b1 10% santykinio dr\u0117gnumo s\u0105lygomis ne ma\u017eiau kaip 40 valand\u0173, kaip numatyta ASTM standartuose<\/li>\n\n\n\n<li><strong>U\u017etikrinkite nuoseklum\u0105:<\/strong> Kiekvienai de\u0161imties bandini\u0173 grupei naudokite tok\u012f pat\u012f str\u0117l\u0117s svor\u012f ir po kiekvieno bandymo svor\u012f didinkite po truput\u012f.<\/li>\n\n\n\n<li><strong>Venkite m\u0117ginio pasislinkimo:<\/strong> \u012esitikinkite, kad bandinys yra tinkamai pritvirtintas, kad sm\u016bgio metu jis nesislinkst\u0173, nes tai gali lemti netikslius rezultatus.<\/li>\n\n\n\n<li><strong>Pakartotiniai tyrimai:<\/strong> Atlikite bandymus su pakankamu bandini\u0173 skai\u010diumi, kad b\u016bt\u0173 u\u017etikrinti patikimi ir statisti\u0161kai reik\u0161mingi rezultatai.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">I\u0161vada<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Svetain\u0117 <strong>str\u0117l\u0117s kritimo sm\u016bgio bandymas<\/strong> yra pagrindinis metodas, skirtas plastiko pl\u0117veli\u0173 patvarumui \u012fvairiose pramon\u0117s \u0161akose \u012fvertinti. Laikantis <strong>\u201eDart\u201c sm\u016bgio bandymo standartas<\/strong> Laikydamiesi standarto ASTM D1709, galite u\u017etikrinti, kad j\u016bs\u0173 med\u017eiagos atitikt\u0173 b\u016btinus atsparumo sm\u016bgiams reikalavimus. Nor\u0117dami pasiekti geriausius rezultatus, apsvarstykite galimyb\u0119 naudoti auk\u0161tos kokyb\u0117s \u012frang\u0105, pavyzd\u017eiui, Cell Instruments FDT-01, kad bandymai b\u016bt\u0173 nuosekl\u016bs ir tiksl\u016bs.<\/p>","protected":false},"excerpt":{"rendered":"<p>The dart drop impact test is a crucial method used to determine the impact resistance of plastic films under specific conditions. According to ASTM D1709, this test measures the energy required to cause failure in a film when subjected to the impact of a free-falling dart. It is commonly used to assess the durability of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1369","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/posts\/1369","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/comments?post=1369"}],"version-history":[{"count":5,"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/posts\/1369\/revisions"}],"predecessor-version":[{"id":1376,"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/posts\/1369\/revisions\/1376"}],"wp:attachment":[{"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/media?parent=1369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/categories?post=1369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dartdroptest.com\/lt\/wp-json\/wp\/v2\/tags?post=1369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}