{"id":3161,"date":"2025-09-25T10:39:01","date_gmt":"2025-09-25T02:39:01","guid":{"rendered":"https:\/\/www.chuxin-smt.com\/how-to-reflow-a-circuit-board-in-an-oven-step-by-step-guide\/"},"modified":"2025-09-25T11:31:32","modified_gmt":"2025-09-25T03:31:32","slug":"how-to-reflow-a-circuit-board-in-an-oven-step-by-step-guide","status":"publish","type":"post","link":"https:\/\/www.chuxin-smt.com\/ro\/how-to-reflow-a-circuit-board-in-an-oven-step-by-step-guide\/","title":{"rendered":"Cum s\u0103 reflow o plac\u0103 de circuit \u00eentr-un cuptor"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1706\" height=\"1279\" class=\"wp-image-3158\" src=\"https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767927-f9c89cafc6ca4da5bd1941a302e72236.jpg\" alt=\"How to Reflow a Circuit Board in An Oven\" srcset=\"https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767927-f9c89cafc6ca4da5bd1941a302e72236.jpg 1706w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767927-f9c89cafc6ca4da5bd1941a302e72236-300x225.jpg 300w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767927-f9c89cafc6ca4da5bd1941a302e72236-1024x768.jpg 1024w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767927-f9c89cafc6ca4da5bd1941a302e72236-768x576.jpg 768w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767927-f9c89cafc6ca4da5bd1941a302e72236-1536x1152.jpg 1536w\" sizes=\"(max-width: 1706px) 100vw, 1706px\" title=\"Cum s\u0103 reflow o plac\u0103 de circuit \u00eentr-un cuptor - S&amp;M Co.Ltd\" \/><\/figure>\r\n\r\n\r\n\r\n<p>Refularea unei pl\u0103ci de circuite \u00eentr-un cuptor necesit\u0103 s\u0103 lucra\u021bi pas cu pas. Preg\u0103ti\u021bi placa, aplica\u021bi pasta de lipit \u0219i plasa\u021bi componentele cu grij\u0103. Pute\u021bi utiliza un cuptor de buc\u0103t\u0103rie sau un cuptor toaster modificat pentru aceast\u0103 sarcin\u0103. Controlul temperaturii face o mare diferen\u021b\u0103 \u00een calitatea final\u0103.<\/p>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Siguran\u021ba conteaz\u0103 cel mai mult - purta\u021bi \u00eentotdeauna echipament de protec\u021bie \u0219i lucra\u021bi \u00eentr-o zon\u0103 bine ventilat\u0103. Cu r\u0103bdare \u0219i aten\u021bie, pute\u021bi realiza acas\u0103 \u00eembin\u0103ri de lipit puternice \u0219i fiabile.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Principalele concluzii<\/h2>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>Acorda\u021bi \u00eentotdeauna prioritate siguran\u021bei. Purta\u021bi echipament de protec\u021bie, lucra\u021bi \u00eentr-o zon\u0103 bine ventilat\u0103 \u0219i p\u0103stra\u021bi-v\u0103 spa\u021biul de lucru organizat pentru a evita r\u0103nile.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Preg\u0103ti\u021bi placa de circuit prin cur\u0103\u021barea temeinic\u0103 a acesteia. Utiliza\u021bi alcool izopropilic sau un aparat de cur\u0103\u021bat cu ultrasunete pentru a asigura \u00eembin\u0103ri de lipire puternice.<\/p>\r\n<\/li>\r\n<li>\r\n<p><a href=\"https:\/\/www.chuxin-smt.com\/ro\/reflow-soldering-cooling-system-importance-optimization\/\" target=\"_blank\" rel=\"noopener\">Controlul temperaturii cuptorului<\/a> cu aten\u021bie. Urma\u021bi profilurile de temperatur\u0103 recomandate pentru pasta de lipit pentru a realiza conexiuni de lipit fiabile.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Monitoriza\u021bi \u00eendeaproape procesul de reflow. Urm\u0103ri\u021bi dac\u0103 lipirea devine lucioas\u0103, indic\u00e2nd c\u0103 s-a topit corect. Evita\u021bi s\u0103 deschide\u021bi cuptorul \u00een timpul acestei etape.<\/p>\r\n<\/li>\r\n<li>\r\n<p><a href=\"https:\/\/www.chuxin-smt.com\/ro\/preheating-systems-cooling-smt-curing-ovens-pcb-reliability\/\" target=\"_blank\" rel=\"noopener\">R\u0103ci\u021bi placa \u00eencet<\/a> dup\u0103 reumplere. L\u0103sa\u021bi-l \u00een cuptor timp de c\u00e2teva minute \u00eenainte de a-l scoate pentru a preveni \u0219ocul termic.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Ce v\u0103 trebuie<\/h2>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Unelte \u0219i materiale<\/h3>\r\n\r\n\r\n\r\n<p>Ave\u021bi nevoie de instrumentele \u0219i materialele potrivite pentru a <a href=\"https:\/\/www.chuxin-smt.com\/ro\/daily-maintenance-cleaning-process-reflow-ovens-guide\/\" target=\"_blank\" rel=\"noopener\">reflow o plac\u0103 de circuit<\/a> \u00eentr-un cuptor. \u00cencepe\u021bi prin a v\u0103 aduna componentele \u0219i echipamentul. Acest pas v\u0103 ajut\u0103 s\u0103 lucra\u021bi eficient \u0219i s\u0103 evita\u021bi gre\u0219elile.<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p><a href=\"https:\/\/www.instructables.com\/Sub-100-Solder-Reflow-Oven\/\" target=\"_blank\" rel=\"nofollow noopener\">Arduino Nano<\/a><\/p>\r\n<\/li>\r\n<li>\r\n<p>Rezisten\u021be de 10K \u0219i 4,7K<\/p>\r\n<\/li>\r\n<li>\r\n<p>Buton tactil<\/p>\r\n<\/li>\r\n<li>\r\n<p>Afi\u0219aj LCD 1602<\/p>\r\n<\/li>\r\n<li>\r\n<p>Termistor 100K<\/p>\r\n<\/li>\r\n<li>\r\n<p>Capace cu pini masculi<\/p>\r\n<\/li>\r\n<li>\r\n<p>Terminale cu \u0219urub pentru montare pe PCB<\/p>\r\n<\/li>\r\n<li>\r\n<p>Buton de oprire de urgen\u021b\u0103 montat pe panou<\/p>\r\n<\/li>\r\n<li>\r\n<p>Indicator luminos montat pe panou<\/p>\r\n<\/li>\r\n<li>\r\n<p>Comutator rotativ cu dou\u0103 pozi\u021bii montat pe panou<\/p>\r\n<\/li>\r\n<li>\r\n<p>Priz\u0103 de perete cu capac<\/p>\r\n<\/li>\r\n<li>\r\n<p>Cuptor toaster<\/p>\r\n<\/li>\r\n<li>\r\n<p>Fir 12 AWG<\/p>\r\n<\/li>\r\n<li>\r\n<p>Conector IEC cu siguran\u021b\u0103 cu \u00eentrerup\u0103tor<\/p>\r\n<\/li>\r\n<li>\r\n<p>Filament PLA<\/p>\r\n<\/li>\r\n<li>\r\n<p>\u0218uruburi \u0219i piuli\u021be M4<\/p>\r\n<\/li>\r\n<li>\r\n<p>3mm tub heatshrink<\/p>\r\n<\/li>\r\n<li>\r\n<p>Band\u0103 Kapton<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>De asemenea, ave\u021bi nevoie de c\u00e2teva instrumente de baz\u0103:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p><a href=\"https:\/\/www.chuxin-smt.com\/ro\/wave-soldering-equipment-common-issues-and-solutions-guide\/\" target=\"_blank\" rel=\"noopener\">Fier de lipit<\/a> \u0219i lipire 60\/40<\/p>\r\n<\/li>\r\n<li>\r\n<p>Pistol termic sau brichet\u0103<\/p>\r\n<\/li>\r\n<li>\r\n<p>\u0218urubelni\u021be<\/p>\r\n<\/li>\r\n<li>\r\n<p>Cuttere de s\u00e2rm\u0103<\/p>\r\n<\/li>\r\n<li>\r\n<p>Cle\u0219te<\/p>\r\n<\/li>\r\n<li>\r\n<p>Cu\u021bit utilitar<\/p>\r\n<\/li>\r\n<li>\r\n<p>Super lipici<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>O imprimant\u0103 3D v\u0103 poate ajuta s\u0103 realiza\u021bi piese personalizate, dar pute\u021bi finaliza majoritatea proiectelor f\u0103r\u0103 ea.<\/p>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Sfat: Verifica\u021bi \u00eentotdeauna lista de piese \u00eenainte de a \u00eencepe. Lipsa unei singure componente v\u0103 poate \u00eent\u00e2rzia proiectul.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<p>Trebuie s\u0103 alege\u021bi pasta de lipit potrivit\u0103 pentru reflow \u00een cuptor. Fiecare tip se tope\u0219te la o temperatur\u0103 diferit\u0103. Temperatura <a href=\"https:\/\/docs.inertialsense.com\/user-manual\/hardware\/reflow\/\" target=\"_blank\" rel=\"nofollow noopener\">tabelul de mai jos prezint\u0103 op\u021biunile comune<\/a>:<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\"><colgroup><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Tip past\u0103 de lipit<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Punct de topire (\u00b0C)<\/p>\r\n<\/th>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Nu curat OM338 SAC405<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>217<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Past\u0103 de lipit cu plumb<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>183<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>F\u0103r\u0103 plumb SAC305<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>217<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Echipament de siguran\u021b\u0103<\/h3>\r\n\r\n\r\n\r\n<p>Proteja\u021bi-v\u0103 de vapori \u0219i arsuri \u00een timpul procesului de reflow. Bun <a href=\"https:\/\/www.allpcb.com\/fr-FR\/blog\/pcb-assembly\/electronics-assembly-safety-preventing-accidents-and-injuries-in-the-workshop.html\" target=\"_blank\" rel=\"nofollow noopener\">echipament de siguran\u021b\u0103<\/a> v\u0103 men\u021bine \u00een siguran\u021b\u0103 \u0219i confortabil.<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\"><colgroup><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Echipament de siguran\u021b\u0103<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Descriere<\/p>\r\n<\/th>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Extractor de fum<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Folosi\u021bi un mic extractor de fum cu un filtru de carbon pentru a elimina vaporii nocivi.<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Ventila\u021bie<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Lucra\u021bi l\u00e2ng\u0103 o fereastr\u0103 deschis\u0103 sau folosi\u021bi un ventilator pentru a men\u021bine aerul proasp\u0103t.<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Masc\u0103<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Purta\u021bi o masc\u0103 N95 dac\u0103 ventila\u021bia este limitat\u0103 pentru a bloca particulele.<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Ochelari de protec\u021bie<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Pune\u021bi-v\u0103 ochelari rezisten\u021bi la impact pentru a v\u0103 proteja ochii de stropii de lipire.<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Not\u0103: Nu s\u0103ri\u021bi niciodat\u0103 peste echipamentul de siguran\u021b\u0103. Fumul de lipire \u0219i componentele fierbin\u021bi pot provoca r\u0103ni grave. Lucra\u021bi \u00eentotdeauna \u00eentr-o zon\u0103 bine ventilat\u0103 \u0219i p\u0103stra\u021bi-v\u0103 spa\u021biul de lucru organizat.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Preg\u0103tirea consiliului<\/h2>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Cur\u0103\u021ba\u021bi placa<\/h3>\r\n\r\n\r\n\r\n<p>\u00cencepe\u021bi prin a v\u0103 asigura c\u0103 placa dvs. de circuite este impecabil\u0103. <a href=\"https:\/\/www.wevolver.com\/article\/reflow-soldering\" target=\"_blank\" rel=\"nofollow noopener\">Cur\u0103\u021benia joac\u0103 un rol important \u00een calitatea \u00eembin\u0103rilor prin lipire<\/a>. Praful, gr\u0103simea sau amprentele pot cauza defecte de lipire \u0219i pot reduce fiabilitatea proiectului dvs. Ave\u021bi la dispozi\u021bie c\u00e2teva metode eficiente de cur\u0103\u021bare:<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>\r\n<p><a href=\"https:\/\/www.allpcb.com\/blog\/pcb-assembly\/cleaning-smd-pcbs-methods-and-best-practices.html\" target=\"_blank\" rel=\"nofollow noopener\"><strong>Cur\u0103\u021bare manual\u0103 cu alcool izopropilic<\/strong><\/a><strong>:<\/strong> Preg\u0103ti\u021bi spa\u021biul de lucru. Folosi\u021bi aer comprimat pentru a \u00eendep\u0103rta praful liber. Aplica\u021bi alcool izopropilic pe o c\u00e2rp\u0103 sau o perie care nu las\u0103 scame, apoi freca\u021bi u\u0219or placa. L\u0103sa\u021bi-o s\u0103 se usuce complet.<\/p>\r\n<\/li>\r\n<li>\r\n<p><strong>Cur\u0103\u021bare cu ultrasunete:<\/strong> Pentru reziduurile persistente, utiliza\u021bi un aparat de cur\u0103\u021bat cu ultrasunete. Umple\u021bi-l cu o solu\u021bie de cur\u0103\u021bare adecvat\u0103, scufunda\u021bi placa \u0219i seta\u021bi cronometrul. Cl\u0103ti\u021bi \u0219i usca\u021bi placa dup\u0103 cur\u0103\u021bare.<\/p>\r\n<\/li>\r\n<li>\r\n<p><strong>Sisteme automatizate de cur\u0103\u021bare:<\/strong> Acestea sunt comune \u00een fabrici, dar mai pu\u021bin practice pentru uz casnic.<\/p>\r\n<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Sfat: Cur\u0103\u021ba\u021bi \u00eentotdeauna placa \u00eenainte de a refolosi o plac\u0103 de circuite. Acest pas ajut\u0103 pasta de lipit s\u0103 se lipeasc\u0103 mai bine \u0219i asigur\u0103 conexiuni puternice.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Aplica\u021bi past\u0103 de lipit<\/h3>\r\n\r\n\r\n\r\n<p>Odat\u0103 ce placa dvs. este curat\u0103, aplica\u021bi past\u0103 de lipit pe pl\u0103cu\u021be. Cantitatea \u0219i modelul corecte sunt importante pentru o reflow reu\u0219it\u0103. Majoritatea pasiona\u021bilor folosesc un \u0219ablon pentru a controla grosimea \u0219i plasarea. <a href=\"https:\/\/www.allpcb.com\/blog\/pcb-assembly\/stencil-aperture-design-for-optimal-solder-paste.html\" target=\"_blank\" rel=\"nofollow noopener\">Grosimea stencilului standard este de aproximativ 0,12 mm<\/a>, dar este posibil s\u0103 ave\u021bi nevoie de un \u0219ablon mai sub\u021bire (0,10 mm) pentru piese mici sau de unul mai gros (0,15 mm) pentru componente mai mari. Asigura\u021bi-v\u0103 c\u0103 deschiderile \u0219ablonului sunt pu\u021bin mai mici dec\u00e2t pl\u0103cu\u021bele pentru a preveni pun\u021bile de lipire.<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>Folosi\u021bi un card de plastic sau o raclet\u0103 pentru a \u00eentinde pasta uniform.<\/p>\r\n<\/li>\r\n<li>\r\n<p>\u00cendep\u0103rta\u021bi \u0219ablonul cu aten\u021bie pentru a evita murd\u0103rirea.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Loc Componente<\/h3>\r\n\r\n\r\n\r\n<p>Acum, plasa\u021bi componentele pe plac\u0103. <a href=\"https:\/\/www.minicircuits.com\/appdoc\/AN0-42.html\" target=\"_blank\" rel=\"noopener\">Fluxul din pasta de lipit va ajuta la men\u021binerea lor \u00een pozi\u021bie<\/a>. Acorda\u021bi aten\u021bie orient\u0103rii fiec\u0103rei p\u0103r\u021bi. Pentru cele mai bune rezultate:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>Plasa\u021bi componentele cu m\u00e2inile sigure \u0219i folosi\u021bi pensete pentru piesele mici.<\/p>\r\n<\/li>\r\n<li>\r\n<p>P\u0103stra\u021bi piesele similare orientate \u00een aceea\u0219i direc\u021bie pentru o inspec\u021bie mai u\u0219oar\u0103.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Tensiunea de suprafa\u021b\u0103 \u00een timpul refluxului va ajuta la centrarea componentelor, dar plasarea precis\u0103 reduce riscul de mi\u0219care.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Pentru piesele grele sau montate \u00een partea inferioar\u0103, lua\u021bi \u00een considerare o pic\u0103tur\u0103 mic\u0103 de adeziv.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Not\u0103: Plasarea atent\u0103 acum v\u0103 economise\u0219te timp \u0219i probleme mai t\u00e2rziu.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Configurarea cuptorului<\/h2>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Alege\u021bi un cuptor<\/h3>\r\n\r\n\r\n\r\n<p>Pute\u021bi utiliza fie un cuptor de buc\u0103t\u0103rie, fie un cuptor toaster modificat pentru a refolosi o plac\u0103 de circuite la domiciliu. Fiecare tip are propriile sale puncte forte \u0219i puncte slabe. <a href=\"https:\/\/www.x-toaster.com\/build-a-toaster-reflow-oven\/choosing-an-oven\/\" target=\"_blank\" rel=\"nofollow noopener\">Tabelul de mai jos v\u0103 ajut\u0103 s\u0103 compara\u021bi cele dou\u0103 op\u021biuni<\/a>:<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\"><colgroup><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Aspect<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Cuptor de buc\u0103t\u0103rie<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Cuptor toaster modificat<\/p>\r\n<\/th>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Iner\u021bia termic\u0103<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Iner\u021bie termic\u0103 mai mare, se \u00eenc\u0103lze\u0219te \u0219i se r\u0103ce\u0219te mai lent<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Iner\u021bie termic\u0103 redus\u0103, se \u00eenc\u0103lze\u0219te \u0219i se r\u0103ce\u0219te mai repede<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Elemente de \u00eenc\u0103lzire<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>De obicei, \u00eenc\u0103lzitoare ceramice<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Poate avea \u00eenc\u0103lzitoare cu cuar\u021b pentru un r\u0103spuns mai rapid<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Fluxul de aer<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Poate necesita modific\u0103ri pentru un flux de aer mai bun<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Ventilatoarele mici pot cauza probleme \u00een timpul refluxului<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Control<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Controalele manuale sunt preferate pentru fiabilitate<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Control extern limitat asupra ventilatorului<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Manipularea componentelor<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Mai bun pentru componente mai mari<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Poate deplasa componente mai mici datorit\u0103 fluxului de aer<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Costuri<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>\u00cen general, mai scumpe<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Poate fi mai rentabil cu modelele de baz\u0103<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<p>Un cuptor de buc\u0103t\u0103rie func\u021bioneaz\u0103 bine pentru pl\u0103ci \u0219i componente mai mari. Un cuptor toaster se \u00eenc\u0103lze\u0219te \u0219i se r\u0103ce\u0219te mai repede, ceea ce v\u0103 ofer\u0103 mai mult control asupra procesului. Evita\u021bi \u00eentotdeauna s\u0103 folosi\u021bi acela\u0219i cuptor pentru alimente dup\u0103 ce refolosi\u021bi o plac\u0103 de circuite.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Set\u0103ri de temperatur\u0103<\/h3>\r\n\r\n\r\n\r\n<p>corespunz\u0103toare <a href=\"https:\/\/www.chuxin-smt.com\/ro\/reflow-soldering-cooling-system-importance-optimization\/\" target=\"_blank\" rel=\"noopener\">controlul temperaturii<\/a> este esen\u021bial\u0103 pentru ob\u021binerea unor \u00eembin\u0103ri de lipit puternice. Trebuie s\u0103 urma\u021bi un profil de temperatur\u0103 care s\u0103 corespund\u0103 pastei de lipit. Lipirea cu plumb \u0219i f\u0103r\u0103 plumb necesit\u0103 temperaturi de v\u00e2rf \u0219i sincroniz\u0103ri diferite. Graficul de mai jos prezint\u0103 profilurile recomandate:<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"768\" class=\"wp-image-3159\" src=\"https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767934-chart_1758764105966580969.webp\" alt=\"Line chart comparing leaded and lead-free solder temperature profiles across reflow zones\" srcset=\"https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767934-chart_1758764105966580969.webp 1024w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767934-chart_1758764105966580969-300x225.webp 300w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2025\/09\/1758767934-chart_1758764105966580969-768x576.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" title=\"Cum s\u0103 reflow o plac\u0103 de circuit \u00eentr-un cuptor1 - S&amp;M Co.Ltd\" \/><\/figure>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\"><colgroup><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Zona<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Plumb (Sn63 Pb37)<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>F\u0103r\u0103 plumb (SAC305)<\/p>\r\n<\/th>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Pre\u00eenc\u0103lzire<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>la 150 \u00b0C \u00een 60 s<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>la 150 \u00b0C \u00een 60 s<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>\u00cenmuia\u021bi<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>de la 150 \u00b0C la 165 \u00b0C \u00een 120 s<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>de la 150 \u00b0C la 180 \u00b0C \u00een 120 s<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Reflow<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>V\u00e2rf 225-235 \u00b0C, men\u021bine\u021bi timp de 20 s<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>V\u00e2rf 245-255 \u00b0C, men\u021bine\u021bi timp de 15 s<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>R\u0103cire<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>-4 \u00b0C\/s sau r\u0103cire cu aer liber<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>-4 \u00b0C\/s sau r\u0103cire cu aer liber<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<p><a href=\"https:\/\/www.allpcb.com\/ar-SA\/blog\/pcb-assembly\/reflow-soldering-secrets-achieving-perfect-smt-joints-every-time.html\" target=\"_blank\" rel=\"nofollow noopener\">Temperatura uniform\u0103 a cuptorului este esen\u021bial\u0103<\/a>. \u00cenc\u0103lzirea neuniform\u0103 poate cauza probleme precum \"tombstoning\", \u00eembin\u0103ri de lipire reci sau \"bridging\". \u00cencerca\u021bi s\u0103 men\u021bine\u021bi temperatura constant\u0103 \u00een \u00eentregul cuptor pentru a v\u0103 asigura c\u0103 fiecare parte a pl\u0103cii dvs. se \u00eenc\u0103lze\u0219te uniform.<\/p>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Sfat: Utiliza\u021bi un termometru de cuptor sau mai mul\u021bi senzori pentru a verifica punctele calde \u0219i reci \u00eenainte de a refolosi o plac\u0103 de circuite.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Aranja\u021bi bordul<\/h3>\r\n\r\n\r\n\r\n<p>Modul \u00een care pune\u021bi placa \u00een cuptor influen\u021beaz\u0103 calitatea rezultatelor. Urma\u021bi aceste sfaturi pentru o \u00eenc\u0103lzire uniform\u0103:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>A\u0219eza\u021bi placa pe un suport de s\u00e2rm\u0103 sau pe o tav\u0103 perforat\u0103 pentru a permite aerului s\u0103 circule pe dedesubt.<\/p>\r\n<\/li>\r\n<li>\r\n<p>\u021aine\u021bi placa centrat\u0103 \u00een cuptor, departe de pere\u021bi \u0219i de elementele de \u00eenc\u0103lzire.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Evita\u021bi suprapunerea pl\u0103cilor sau amplasarea lor prea aproape una de cealalt\u0103.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Utilizare <a href=\"https:\/\/whizoo.com\/blogs\/insights\/the-value-of-heat-distribution-for-reflow\" target=\"_blank\" rel=\"noopener\">\u00eenc\u0103lzire prin convec\u021bie, dac\u0103 cuptorul dvs. o accept\u0103<\/a>. Aerul cald for\u021bat ajut\u0103 la distribuirea uniform\u0103 a c\u0103ldurii \u0219i reduce stresul termic asupra componentelor.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Dac\u0103 utiliza\u021bi \u00eenc\u0103lzitoare cu infraro\u0219u, fi\u021bi aten\u021bi la punctele calde \u0219i reci. Dac\u0103 este necesar, muta\u021bi placa pentru a evita \u00eenc\u0103lzirea neuniform\u0103.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>Cuptoarele reflow comerciale utilizeaz\u0103 benzi transportoare \u0219i zone de c\u0103ldur\u0103 multiple pentru rezultate perfecte. Acas\u0103, pute\u021bi realiza \u00eembin\u0103ri de lipit fiabile cu o configurare atent\u0103 \u0219i aten\u021bie la detalii.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Reflow A Circuit Board<\/h2>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">\u00cencepe\u021bi refluxul<\/h3>\r\n\r\n\r\n\r\n<p>A\u021bi preg\u0103tit placa \u0219i v-a\u021bi configurat cuptorul. Acum sunte\u021bi gata s\u0103 \u00eencepe\u021bi procesul de reflow. A\u0219eza\u021bi placa \u00een centrul cuptorului. \u00cenchide\u021bi u\u0219a u\u0219or pentru a evita deplasarea componentelor. Seta\u021bi cuptorul s\u0103 urmeze indica\u021biile <a href=\"https:\/\/www.chuxin-smt.com\/ro\/slug-an-in-depth-guide-to-the-reflow-profile\/\" target=\"_blank\" rel=\"noopener\">profilul de temperatur\u0103 pentru pasta dvs. de lipit<\/a>.<\/p>\r\n\r\n\r\n\r\n<p>Urma\u021bi ace\u0219ti pa\u0219i pentru a refolosi o plac\u0103 de circuite:<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>\r\n<p><strong>Pre\u00eenc\u0103lzire<\/strong>: Ridica\u021bi temperatura cuptorului la aproximativ 150 \u00b0C. Men\u021bine\u021bi aceast\u0103 temperatur\u0103 timp de 60 de secunde. Aceast\u0103 etap\u0103 ajut\u0103 la eliminarea umidit\u0103\u021bii \u0219i preg\u0103te\u0219te placa pentru lipire.<\/p>\r\n<\/li>\r\n<li>\r\n<p><strong>Zona de \u00eenmuiere<\/strong>: Cre\u0219te\u021bi \u00eencet temperatura la o valoare cuprins\u0103 \u00eentre 150 \u00b0C \u0219i 180 \u00b0C. Men\u021bine\u021bi placa \u00een acest interval timp de <a href=\"https:\/\/www.allpcb.com\/ar-SA\/blog\/pcb-assembly\/mastering-the-reflow-soldering-temperature-profile-a-step-by-step-guide.html\" target=\"_blank\" rel=\"nofollow noopener\">60 p\u00e2n\u0103 la 120 de secunde<\/a>. Acest lucru permite pastei de lipit s\u0103 se activeze \u0219i s\u0103 se r\u0103sp\u00e2ndeasc\u0103. Dac\u0103 gr\u0103bi\u021bi acest pas, este posibil s\u0103 ob\u021bine\u021bi \u00eembin\u0103ri de lipit slabe. Dac\u0103 sta\u021bi prea mult, fluxul \u00ee\u0219i poate pierde eficien\u021ba.<\/p>\r\n<\/li>\r\n<li>\r\n<p><strong>Zona de refulare<\/strong>: Cre\u0219te\u021bi temperatura p\u00e2n\u0103 la v\u00e2rf (225-255 \u00b0C, \u00een func\u021bie de pasta de lipit). Men\u021bine\u021bi aceast\u0103 temperatur\u0103 timp de 30 p\u00e2n\u0103 la 90 de secunde. Urm\u0103ri\u021bi ca lipitura s\u0103 se topeasc\u0103 \u0219i s\u0103 devin\u0103 lucioas\u0103. Aceasta este cea mai important\u0103 parte a procesului. Nu l\u0103sa\u021bi placa s\u0103 stea la aceast\u0103 temperatur\u0103 prea mult timp. Prea mult timp v\u0103 poate deteriora componentele.<\/p>\r\n<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Sfat: Utiliza\u021bi un termometru de cuptor pentru a verifica temperatura real\u0103 din cuptor. Cadranele cuptorului sunt adesea inexacte.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Monitorizarea procesului<\/h3>\r\n\r\n\r\n\r\n<p>Trebuie s\u0103 urm\u0103ri\u021bi \u00eendeaproape placa \u00een timpul procesului de reflow. Privi\u021bi prin fereastra cuptorului, dac\u0103 este posibil. Ve\u021bi vedea cum pasta de lipit trece de la o culoare gri tern\u0103 la o stare lichid\u0103, str\u0103lucitoare. Acesta este un semn clar c\u0103 lipirea s-a topit \u0219i formeaz\u0103 \u00eembin\u0103ri bune.<\/p>\r\n\r\n\r\n\r\n<p>Pentru a evita problemele, \u021bine\u021bi cont de urm\u0103toarele puncte:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>Asigura\u021bi-v\u0103 c\u0103 componentele nu se mi\u0219c\u0103 sau plutesc pe lipire. <a href=\"https:\/\/www.circuitnet.com\/experts\/44477.html\" target=\"_blank\" rel=\"nofollow noopener\">Plasare precis\u0103<\/a> \u00eenainte de reflow ajut\u0103 la prevenirea deplas\u0103rii.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Evita\u021bi deschiderea cuptorului \u00een timpul refluxului. Schimb\u0103rile bru\u0219te ale temperaturii sau ale fluxului de aer pot cauza deplasarea componentelor sau crearea de \u00eembin\u0103ri reci.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Gestiona\u021bi profilul termic al cuptorului. Ratele ridicate de convec\u021bie pot \u00eempinge piesele mici din loc. Utiliza\u021bi o \u00eenc\u0103lzire bl\u00e2nd\u0103 \u0219i evita\u021bi ventilatoarele puternice.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Verifica\u021bi dac\u0103 pasta de lipit \u021bine bine fiecare component\u0103. Dac\u0103 vede\u021bi c\u0103 unele piese se mi\u0219c\u0103, opri\u021bi procesul \u0219i repara\u021bi amplasarea \u00eenainte de a \u00eencerca din nou.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Not\u0103: Monitorizarea atent\u0103 v\u0103 ajut\u0103 s\u0103 depista\u021bi problemele la timp. Pute\u021bi preveni supra\u00eenc\u0103lzirea \u0219i evita gre\u0219elile costisitoare.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">R\u0103cirea \u00een jos<\/h3>\r\n\r\n\r\n\r\n<p>Dup\u0103 ce lipirea s-a topit \u0219i a format \u00eembin\u0103ri, trebuie s\u0103 r\u0103ci\u021bi placa. Opri\u021bi cuptorul \u0219i deschide\u021bi u\u0219or u\u0219a. L\u0103sa\u021bi placa s\u0103 se r\u0103ceasc\u0103 \u00eencet \u00een cuptor timp de c\u00e2teva minute. Acest lucru ajut\u0103 <a href=\"https:\/\/www.chuxin-smt.com\/ro\/reflow-soldering-cooling-system-importance-optimization\/\" target=\"_blank\" rel=\"noopener\">prevenirea \u0219ocului termic<\/a>, care pot fisura \u00eembin\u0103rile de lipire sau deteriora componentele.<\/p>\r\n\r\n\r\n\r\n<p>Urma\u021bi ace\u0219ti pa\u0219i pentru o r\u0103cire sigur\u0103:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>Nu muta\u021bi imediat placa. L\u0103sa\u021bi-o s\u0103 stea p\u00e2n\u0103 c\u00e2nd temperatura scade sub 100 \u00b0C.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Dup\u0103 ce placa este suficient de rece pentru a fi atins\u0103, scoate\u021bi-o din cuptor folosind m\u0103nu\u0219i rezistente la c\u0103ldur\u0103.<\/p>\r\n<\/li>\r\n<li>\r\n<p>A\u0219eza\u021bi placa pe o suprafa\u021b\u0103 plan\u0103, rezistent\u0103 la c\u0103ldur\u0103. L\u0103sa\u021bi-o s\u0103 ajung\u0103 la temperatura camerei \u00eenainte de manipulare sau testare.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Sfat: Nu utiliza\u021bi niciodat\u0103 ventilatoare sau aer rece pentru a accelera r\u0103cirea. R\u0103cirea rapid\u0103 poate provoca fisuri \u00een \u00eembin\u0103rile de lipire.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<p>A\u021bi finalizat acum principalii pa\u0219i pentru a refolosi o plac\u0103 de circuite. Cronometrarea atent\u0103, monitorizarea atent\u0103 \u0219i r\u0103cirea u\u0219oar\u0103 v\u0103 ajut\u0103 s\u0103 ob\u021bine\u021bi \u00eembin\u0103ri de lipit puternice \u0219i fiabile.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Siguran\u021b\u0103 \u0219i sfaturi<\/h2>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Precau\u021bii de siguran\u021b\u0103<\/h3>\r\n\r\n\r\n\r\n<p>Atunci c\u00e2nd refolosi\u021bi o plac\u0103 de circuite \u00eentr-un cuptor, siguran\u021ba trebuie s\u0103 fie pe primul loc. Temperaturile ridicate \u0219i echipamentele electrice pot provoca r\u0103ni grave dac\u0103 nu urma\u021bi m\u0103surile de precau\u021bie adecvate. \u021aine\u021bi \u00eentotdeauna cont de ace\u0219ti pa\u0219i:<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>\r\n<p><a href=\"https:\/\/www.hvttec.com\/how-to-maintain-a-reflow-oven.html\" target=\"_blank\" rel=\"nofollow noopener\">Purta\u021bi haine de lucru de siguran\u021b\u0103<\/a>, m\u0103nu\u0219i \u0219i ochelari de protec\u021bie.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Opri\u021bi \u0219i scoate\u021bi din priz\u0103 toate echipamentele \u00eenainte de \u00eentre\u021binere sau mutare.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Evita\u021bi s\u0103 atinge\u021bi elementele de \u00eenc\u0103lzire sau piesele \u00een mi\u0219care \u00een timpul func\u021bion\u0103rii.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Nu ocoli\u021bi niciodat\u0103 comutatoarele de siguran\u021b\u0103 \u0219i nu ignora\u021bi etichetele de avertizare.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Manipula\u021bi componentele de \u00eenalt\u0103 tensiune cu mare aten\u021bie.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Utiliza\u021bi o masc\u0103 \u0219i lucra\u021bi \u00eentr-o zon\u0103 bine ventilat\u0103 pentru a evita inhalarea vaporilor sau a fibrelor.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Nu utiliza\u021bi echipamente cu defec\u021biuni sau pericole ascunse.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Preveni\u021bi scuturarea sau vibra\u021biile \u00een timpul transportului pentru a v\u0103 proteja placa.<\/p>\r\n<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>\u26a0\ufe0f <strong>Sfat:<\/strong> Verifica\u021bi \u00eentotdeauna de dou\u0103 ori dac\u0103 cuptorul este oprit \u0219i rece \u00eenainte de a intra \u00een el.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Rezolvarea problemelor<\/h3>\r\n\r\n\r\n\r\n<p>Este posibil s\u0103 v\u0103 confrunta\u021bi cu probleme comune \u00een timpul procesului de reflow. Utiliza\u021bi acest tabel pentru a identifica problemele \u0219i a g\u0103si solu\u021bii:<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\"><colgroup><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Problema<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Cauza<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Solu\u021bie<\/p>\r\n<\/th>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>\u00cembin\u0103ri prin lipire la rece<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>C\u0103ldur\u0103 insuficient\u0103 sau past\u0103 slab\u0103<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Re\u00eenc\u0103lzi\u021bi cu flux \u0219i o unealt\u0103 cu aer cald<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Tombstoning<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>\u00cenc\u0103lzire inegal\u0103 sau amplasare gre\u0219it\u0103<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Echilibrarea cuprului, \u00eembun\u0103t\u0103\u021birea amplas\u0103rii<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Bile de lipit<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Rata de \u00eenc\u0103lzire este prea mare<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Reducerea ratei de \u00eenc\u0103lzire<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Condensatoare fisurate<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Schimb\u0103ri rapide de temperatur\u0103<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>\u00cencetini\u021bi \u00eenc\u0103lzirea \u0219i r\u0103cirea<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Delaminare<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Umiditate \u00een PCB<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Pl\u0103ci pre-coapte, depozitate \u00een condi\u021bii uscate<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<p>Dac\u0103 observa\u021bi un joint rece, <a href=\"https:\/\/www.allpcb.com\/blog\/pcb-manufacturing\/troubleshooting-cold-solder-joints-hot-air-rework-to-the-rescue.html\" target=\"_blank\" rel=\"nofollow noopener\">aplica\u021bi pu\u021bin flux, utiliza\u021bi o unealt\u0103 cu aer cald la 300-350\u00b0C<\/a>, \u0219i l\u0103sa\u021bi \u00eembinarea s\u0103 se r\u0103ceasc\u0103 \u00een mod natural. Inspecta\u021bi \u00eentotdeauna repara\u021biile cu o lup\u0103 \u0219i testa\u021bi-le cu un multimetru.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Cele mai bune practici<\/h3>\r\n\r\n\r\n\r\n<p>V\u0103 pute\u021bi \u00eembun\u0103t\u0103\u021bi rezultatele urm\u00e2nd urm\u0103toarele <a href=\"https:\/\/www.chuxin-smt.com\/ro\/extend-reflow-oven-service-life-with-maintenance-tips\/\" target=\"_blank\" rel=\"noopener\">cele mai bune practici<\/a>:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p><a href=\"https:\/\/www.allpcb.com\/ar-SA\/blog\/pcb-knowledge\/hdi-pcb-reflow-soldering-best-practices-for-reliable-joints.html\" target=\"_blank\" rel=\"nofollow noopener\">P\u0103stra\u021bi pasta de lipit \u00eentr-un loc r\u0103coros<\/a> \u0219i se las\u0103 s\u0103 ajung\u0103 la temperatura camerei \u00eenainte de utilizare.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Cur\u0103\u021ba\u021bi PCB-ul cu alcool izopropilic \u00eenainte de a aplica pasta de lipit.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Inspecta\u021bi toate componentele pentru a verifica dac\u0103 exist\u0103 pini \u00eendoi\u021bi sau deterior\u0103ri.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Utiliza\u021bi un <a href=\"https:\/\/rayshobby.net\/wordpress\/reflow-toaster-oven-with-bells-and-whistles\/\" target=\"_blank\" rel=\"nofollow noopener\">termometru digital extern pentru verificarea temperaturii cuptorului<\/a> \u00een punctele cheie. Acest lucru v\u0103 ajut\u0103 s\u0103 v\u0103 calibra\u021bi cuptorul pentru un control precis.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Modifica\u021bi cuptorul cu elemente de \u00eenc\u0103lzire suplimentare sau izola\u021bie pentru o c\u0103ldur\u0103 uniform\u0103. Un ventilator de convec\u021bie poate fi de ajutor, dar folosi\u021bi-l cu grij\u0103 pentru a evita mi\u0219carea pieselor mici.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Calibra\u021bi regulat cuptorul \u0219i verifica\u021bi dac\u0103 exist\u0103 zone calde sau reci.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>\ud83d\udee0\ufe0f <strong>Not\u0103:<\/strong> Preg\u0103tirea \u0219i monitorizarea atent\u0103 conduc de fiecare dat\u0103 la \u00eembin\u0103ri prin lipire fiabile, de calitate profesional\u0103.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<p>Pute\u021bi st\u0103p\u00e2ni reflow-ul pl\u0103cilor de circuite la domiciliu urm\u00e2nd ace\u0219ti pa\u0219i: preg\u0103ti\u021bi placa, configura\u021bi cuptorul, reflow-ul cu aten\u021bie \u0219i inspecta\u021bi-v\u0103 munca. Acorda\u021bi aten\u021bie sporit\u0103 controlului temperaturii \u0219i siguran\u021bei. Gre\u0219eli frecvente precum <a href=\"https:\/\/www.circuits-central.com\/blog\/4-common-bga-rework-mistakes-and-how-to-avoid-them\/\" target=\"_blank\" rel=\"nofollow noopener\">nealiniere, popcorning \u0219i golire<\/a> pot fi evitate cu r\u0103bdare \u0219i tehnic\u0103 adecvat\u0103.<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\"><colgroup><col style=\"min-width: 25px;\" \/><col style=\"min-width: 25px;\" \/><\/colgroup>\r\n<tbody>\r\n<tr>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Gre\u0219eal\u0103<\/p>\r\n<\/th>\r\n<th colspan=\"1\" rowspan=\"1\">\r\n<p>Cum s\u0103 evita\u021bi<\/p>\r\n<\/th>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Nealiniere<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Minimiza\u021bi mi\u0219carea, utiliza\u021bi fluxul<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Popcorning<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>P\u0103stra\u021bi componentele uscate<\/p>\r\n<\/td>\r\n<\/tr>\r\n<tr>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Anularea<\/p>\r\n<\/td>\r\n<td colspan=\"1\" rowspan=\"1\">\r\n<p>Pre\u00eenc\u0103lzi\u021bi mai mult, schimba\u021bi pasta<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<p>\u00cencerca\u021bi diferite metode \u0219i instrumente. Utiliza\u021bi un termometru pentru controlul manual. Cu practic\u0103, v\u0103 ve\u021bi \u00eembun\u0103t\u0103\u021bi rezultatele \u0219i ve\u021bi construi pl\u0103ci fiabile.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">\u00ceNTREB\u0102RI FRECVENTE<\/h2>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Pot folosi cuptorul meu obi\u0219nuit de buc\u0103t\u0103rie pentru lipirea prin reflow?<\/h3>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Pute\u021bi folosi un cuptor de buc\u0103t\u0103rie, dar nu \u00eel mai folosi\u021bi niciodat\u0103 pentru m\u00e2ncare. Vaporii de lipire pot contamina suprafe\u021bele. Un cuptor toaster dedicat func\u021bioneaz\u0103 mai bine pentru proiectele electronice.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Cum \u0219tiu c\u00e2nd lipirea s-a topit corect?<\/h3>\r\n\r\n\r\n\r\n<p>Ave\u021bi grij\u0103 ca lipirea s\u0103 devin\u0103 str\u0103lucitoare \u0219i s\u0103 formeze m\u0103rgele mici \u0219i netede \u00een jurul fiec\u0103rei pl\u0103cu\u021be. Pute\u021bi vedea aceast\u0103 schimbare prin fereastra cuptorului. Nu deschide\u021bi cuptorul \u00een timpul acestei etape.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Ce trebuie s\u0103 fac dac\u0103 componentele se mi\u0219c\u0103 \u00een timpul refluxului?<\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<p>\u00centrerupe\u021bi procesul.<\/p>\r\n<\/li>\r\n<li>\r\n<p>L\u0103sa\u021bi placa s\u0103 se r\u0103ceasc\u0103.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Repozi\u021biona\u021bi componentele cu penseta.<\/p>\r\n<\/li>\r\n<li>\r\n<p>Reporni\u021bi ciclul de reflow.<\/p>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\r\n<p>Plasarea atent\u0103 \u00eenainte de \u00eenc\u0103lzire ajut\u0103 la prevenirea acestei probleme.<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Pasta de lipit f\u0103r\u0103 plumb este mai sigur\u0103 dec\u00e2t pasta cu plumb?<\/h3>\r\n\r\n\r\n\r\n<p>Pasta de lipit f\u0103r\u0103 plumb reduce riscurile pentru s\u0103n\u0103tate, dar ave\u021bi nevoie \u00een continuare de o bun\u0103 ventila\u021bie. Ambele tipuri elibereaz\u0103 vapori. Purta\u021bi \u00eentotdeauna o masc\u0103 \u0219i utiliza\u021bi un extractor de fum pentru siguran\u021b\u0103.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Pot refolosi pl\u0103ci cu dou\u0103 fe\u021be \u00eentr-un cuptor de uz casnic?<\/h3>\r\n\r\n\r\n\r\n<p>Pute\u021bi refolosi pl\u0103ci cu dou\u0103 fe\u021be. Plasa\u021bi mai \u00eent\u00e2i componentele mai grele pe partea inferioar\u0103. Refolosi\u021bi acea parte, apoi ad\u0103uga\u021bi componentele de sus \u0219i repeta\u021bi. Utiliza\u021bi o cantitate minim\u0103 de past\u0103 de lipit pentru a ajuta piesele s\u0103 r\u0103m\u00e2n\u0103 pe pozi\u021bie.<\/p>\r\n\r\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>R\u0103ci\u021bi o plac\u0103 de circuit \u00eentr-un cuptor cu \u00eendrum\u0103ri pas cu pas privind configurarea, controlul temperaturii \u0219i siguran\u021ba pentru \u00eembin\u0103ri de lipit puternice \u0219i fiabile.<\/p>","protected":false},"author":1,"featured_media":3160,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"categories":[1,52],"tags":[57,66,61,84,64,83],"class_list":["post-3161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-company-news","category-product-information","tag-reflow-oven","tag-smt-equipment","tag-smt-solution","tag-solder-equipment","tag-soldering-process","tag-welding-equipment"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/posts\/3161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/comments?post=3161"}],"version-history":[{"count":0,"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/posts\/3161\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/media\/3160"}],"wp:attachment":[{"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/media?parent=3161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/categories?post=3161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/ro\/wp-json\/wp\/v2\/tags?post=3161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}