{"id":15340,"date":"2025-01-31T10:20:21","date_gmt":"2025-01-31T02:20:21","guid":{"rendered":"https:\/\/moldiecasting.com\/?p=15340"},"modified":"2026-10-08T20:17:28","modified_gmt":"2026-10-08T12:17:28","slug":"die-casting-defects-and-solutions","status":"publish","type":"post","link":"https:\/\/moldiecasting.com\/ro\/blog\/die-casting-defects-and-solutions\/","title":{"rendered":"Defecte de turnare sub presiune \u0219i solu\u021bii"},"content":{"rendered":"<p><a href=\"https:\/\/moldiecasting.com\/ro\/blog\/die-casting-process-materials-and-tooling-die-design-overview\/\">Turnare sub presiune<\/a>, un proces de fabrica\u021bie utilizat pe scar\u0103 larg\u0103 pentru producerea pieselor metalice complexe, se confrunt\u0103 adesea cu defecte care pot compromite calitatea \u0219i func\u021bionalitatea produselor. Remedierea acestora presupune \u00een\u021belegerea cauzelor, aplicarea unor solu\u021bii eficiente \u0219i adoptarea m\u0103surilor preventive.<\/p>\n<h2>Porozitate<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-656\" src=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Porosity.jpg\" alt=\"\" width=\"800\" height=\"450\" srcset=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Porosity.jpg 800w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Porosity-300x169.jpg 300w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Porosity-768x432.jpg 768w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Porosity-18x10.jpg 18w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>Defini\u021bie:<\/strong>Porozitatea este un defect \u00een care se formeaz\u0103 goluri mici sau bule \u00een pies\u0103 din cauza gazelor captive ori a solidific\u0103rii necorespunz\u0103toare. Aceasta sl\u0103be\u0219te integritatea structural\u0103 a piesei turnate, f\u0103c\u00e2nd-o nepotrivit\u0103 pentru aplica\u021biile care necesit\u0103 rezisten\u021b\u0103 sau etan\u0219eitate.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Aer sau gaze captive:\u00a0Aerul antrenat \u00een metalul topit \u00een timpul inject\u0103rii formeaz\u0103 goluri dac\u0103 nu poate ie\u0219i \u00een timpul solidific\u0103rii.<\/li>\n<li>Aerisire necorespunz\u0103toare:\u00a0Orificiile de aerisire insuficiente din matri\u021b\u0103 \u00eempiedic\u0103 evacuarea gazelor \u0219i m\u0103resc porozitatea.<\/li>\n<li>Curge turbulent\u0103 a metalului:\u00a0Mi\u0219carea instabil\u0103 sau haotic\u0103 a metalului topit antreneaz\u0103 aer.<\/li>\n<li>Captarea gazelor:\u00a0Utilizarea excesiv\u0103 a agen\u021bilor de demulare sau a lubrifian\u021bilor poate genera gaze \u00een cavitate.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Optimizarea sistemului de aerisire:\u00a0Aerisirea corect\u0103 permite evacuarea gazelor captive \u00eenainte de solidificare. Pot ajuta canalele de preaplin \u0219i de aerisire.<\/li>\n<li>Reglarea vitezei de injectare:\u00a0Reducerea vitezei inject\u0103rii diminueaz\u0103 turbulen\u021bele \u0219i permite curgerea ordonat\u0103 a metalului.<\/li>\n<li>Controlul temperaturii metalului:\u00a0Men\u021bine\u021bi o temperatur\u0103 uniform\u0103 \u0219i optim\u0103 a metalului pentru a asigura umplerea f\u0103r\u0103 probleme.<\/li>\n<li>Utilizarea sistemelor de vid:\u00a0Folosi\u021bi un proces asistat de vid pentru a elimina aerul \u0219i impurit\u0103\u021bile din piesa turnat\u0103.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Proiectarea unor sisteme de preaplin adecvate:\u00a0Include\u021bi canale de preaplin pentru a devia gazele \u0219i a asigura curgerea uniform\u0103 a metalului.<\/li>\n<li>Men\u021binerea unei temperaturi constante a metalului:\u00a0Evita\u021bi supra\u00eenc\u0103lzirea sau r\u0103cirea brusc\u0103 pentru a reduce captarea gazelor.<\/li>\n<li>\u00centre\u021binerea regulat\u0103 a matri\u021bei:\u00a0P\u0103stra\u021bi matri\u021ba curat\u0103 \u0219i f\u0103r\u0103 impurit\u0103\u021bi pentru a preveni acumularea gazelor.<\/li>\n<li>Proiectarea corect\u0103 a por\u021bilor \u0219i canalelor de alimentare: Asigura\u021bi-v\u0103 c\u0103 por\u021bile \u0219i canalele sunt suficient de mari pentru umplerea complet\u0103 a formei, cu turbulen\u021be minime.<\/li>\n<\/ul>\n<h2>\u00cembin\u0103ri reci<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-657\" src=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/cold-shut.jpg\" alt=\"\" width=\"800\" height=\"450\" srcset=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/cold-shut.jpg 800w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/cold-shut-300x169.jpg 300w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/cold-shut-768x432.jpg 768w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/cold-shut-18x10.jpg 18w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>Defini\u021bie:<\/strong>\u00cembin\u0103rile reci apar atunci c\u00e2nd dou\u0103 fronturi de metal topit se \u00eent\u00e2lnesc, dar nu fuzioneaz\u0103 corespunz\u0103tor, l\u0103s\u00e2nd o cus\u0103tur\u0103 vizibil\u0103 sau o leg\u0103tur\u0103 slab\u0103. Defectul afecteaz\u0103 at\u00e2t aspectul, c\u00e2t \u0219i rezisten\u021ba piesei turnate.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Temperatura sc\u0103zut\u0103 a metalului:\u00a0Temperatura insuficient\u0103 provoac\u0103 solidificarea prematur\u0103 a metalului topit.<\/li>\n<li>Vitez\u0103 redus\u0103 de injectare:\u00a0\u00cent\u00e2rzierea curgerii metalului duce la r\u0103cirea par\u021bial\u0103 \u00eenainte de fuziune.<\/li>\n<li>Curge necorespunz\u0103toare a metalului:\u00a0Curgea neregulat\u0103, provocat\u0103 de proiectarea slab\u0103 a por\u021bilor, contribuie la fuziunea incomplet\u0103.<\/li>\n<li>Aerisire insuficient\u0103:\u00a0Aerul captiv poate \u00eempiedica unirea fronturilor de metal topit.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Cre\u0219terea temperaturii metalului:\u00a0M\u0103ri\u021bi temperatura pentru ca metalul topit s\u0103 curg\u0103 \u0219i s\u0103 fuzioneze corespunz\u0103tor.<\/li>\n<li>Optimizarea vitezei de injectare:\u00a0Regla\u021bi viteza pentru a ob\u021bine o curgere lin\u0103 \u0219i continu\u0103 a metalului.<\/li>\n<li>\u00cembun\u0103t\u0103\u021birea proiect\u0103rii por\u021bilor:\u00a0Pozi\u021biona\u021bi por\u021bile astfel \u00eenc\u00e2t s\u0103 dirijeze eficient curgerea.<\/li>\n<li>Amplasarea mai bun\u0103 a orificiilor de aerisire:\u00a0Ad\u0103uga\u021bi orificii \u00een zonele-cheie pentru evacuarea aerului captiv.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Monitorizarea constant\u0103 a temperaturii metalului:\u00a0Asigura\u021bi \u00eenc\u0103lzirea uniform\u0103 a metalului topit pe tot parcursul procesului.<\/li>\n<li>Verificarea regulat\u0103 a temperaturii matri\u021bei:\u00a0Men\u021bine\u021bi temperatura optim\u0103 a matri\u021bei pentru a preveni r\u0103cirea prematur\u0103.<\/li>\n<li>Proiectarea amplas\u0103rii corecte a por\u021bilor:\u00a0Pozi\u021biona\u021bi strategic por\u021bile pentru a \u00eembun\u0103t\u0103\u021bi curgerea metalului \u0219i a reduce turbulen\u021bele.<\/li>\n<li>Men\u021binerea vitezei optime de injectare: Echilibra\u021bi viteza pentru a evita r\u0103cirea \u0219i a asigura umplerea constant\u0103.<\/li>\n<\/ul>\n<h2>Zone fierbin\u021bi<\/h2>\n<p><strong>Defini\u021bie:<\/strong>Zonele fierbin\u021bi sunt regiuni locale supra\u00eenc\u0103lzite \u00een matri\u021b\u0103, care provoac\u0103 r\u0103cire neuniform\u0103 \u0219i defecte precum deformarea sau abateri dimensionale ale piesei turnate.<\/p>\n<p>Cauze:<\/p>\n<ul>\n<li>Temperatura neuniform\u0103 a matri\u021bei:\u00a0R\u0103cirea neuniform\u0103 creeaz\u0103 zone cu acumulare excesiv\u0103 de c\u0103ldur\u0103.<\/li>\n<li>Proiectarea slab\u0103 a r\u0103cirii:\u00a0Lipsa canalelor de r\u0103cire eficiente \u00een matri\u021b\u0103 provoac\u0103 puncte fierbin\u021bi locale.<\/li>\n<li>Lubrifiere insuficient\u0103:\u00a0Aplicarea insuficient\u0103 sau neuniform\u0103 a lubrifiantului poate agrava problemele termice.<\/li>\n<li>Acumularea metalului:\u00a0Excesul de metal \u00een anumite zone poate re\u021bine c\u0103ldura mai mult timp.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Echilibrarea canalelor de r\u0103cire:\u00a0Proiecta\u021bi o re\u021bea optimizat\u0103 de canale de r\u0103cire pentru disiparea uniform\u0103 a c\u0103ldurii.<\/li>\n<li>Reglarea temperaturii matri\u021bei:\u00a0Monitoriza\u021bi \u0219i regla\u021bi atent temperatura matri\u021bei \u00een timpul produc\u021biei.<\/li>\n<li>Optimizarea lubrifierii:\u00a0Asigura\u021bi aplicarea constant\u0103 \u0219i suficient\u0103 a lubrifian\u021bilor de \u00eenalt\u0103 calitate.<\/li>\n<li>Modificarea proiect\u0103rii piesei:\u00a0Elimina\u021bi sec\u021biunile groase predispuse la re\u021binerea c\u0103ldurii.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>\u00centre\u021binerea regulat\u0103 a sistemului de r\u0103cire:\u00a0Cur\u0103\u021ba\u021bi canalele de r\u0103cire \u0219i verifica\u021bi dac\u0103 sunt blocate sau func\u021bioneaz\u0103 ineficient.<\/li>\n<li>Controlul corect al temperaturii matri\u021bei:\u00a0Utiliza\u021bi sisteme avansate de monitorizare a temperaturii pentru a asigura r\u0103cirea uniform\u0103.<\/li>\n<li>Aplicarea constant\u0103 a lubrifiantului:\u00a0Folosi\u021bi sisteme automate de lubrifiere pentru a aplica o cantitate uniform\u0103.<\/li>\n<li>Monitorizarea distribu\u021biei termice: Utiliza\u021bi imagistica termic\u0103 pentru a identifica punctele de concentrare a c\u0103ldurii \u00een timpul produc\u021biei.<\/li>\n<\/ul>\n<h2>Umpleri incomplete \/ piese turnate incomplet<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-655\" src=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Misruns.jpg\" alt=\"\" width=\"800\" height=\"450\" srcset=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Misruns.jpg 800w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Misruns-300x169.jpg 300w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Misruns-768x432.jpg 768w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Misruns-18x10.jpg 18w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>Defini\u021bie:<\/strong>Umplerile incomplete apar atunci c\u00e2nd metalul topit nu umple complet cavitatea matri\u021bei, rezult\u00e2nd sec\u021biuni incomplete sau lips\u0103 ale piesei turnate.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Volum insuficient de metal:\u00a0Volumul de metal topit nu este suficient pentru umplerea cavit\u0103\u021bii.<\/li>\n<li>Presiune sc\u0103zut\u0103 de injectare:\u00a0Presiunea insuficient\u0103 \u00eempiedic\u0103 r\u0103sp\u00e2ndirea complet\u0103 a metalului.<\/li>\n<li>Curge necorespunz\u0103toare a metalului:\u00a0Obstacolele sau proiectarea slab\u0103 a sistemului de alimentare \u00eempiedic\u0103 curgerea corect\u0103.<\/li>\n<li>Temperatur\u0103 sc\u0103zut\u0103 a matri\u021bei:\u00a0O matri\u021b\u0103 rece provoac\u0103 solidificarea prematur\u0103 a metalului topit.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Cre\u0219terea volumului de metal:\u00a0Asigura\u021bi un volum suficient de metal pentru fiecare injec\u021bie.<\/li>\n<li>Reglarea presiunii de injectare:\u00a0M\u0103ri\u021bi presiunea pentru a asigura umplerea complet\u0103 a formei.<\/li>\n<li>Optimizarea amplas\u0103rii por\u021bilor:\u00a0Pozi\u021biona\u021bi por\u021bile pentru a favoriza umplerea uniform\u0103 \u0219i curgerea lin\u0103.<\/li>\n<li>\u00cenc\u0103lzirea corect\u0103 a matri\u021bei:\u00a0Pre\u00eenc\u0103lzi\u021bi matri\u021ba pentru a preveni solidificarea prematur\u0103.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Verificarea regulat\u0103 a volumului injectat:\u00a0Asigura\u021bi-v\u0103 c\u0103 fiecare injec\u021bie con\u021bine cantitatea corect\u0103 de metal topit.<\/li>\n<li>Men\u021binerea constant\u0103 a temperaturii matri\u021bei:\u00a0Utiliza\u021bi \u00eenc\u0103lzitoare sau regulatoare de temperatur\u0103 pentru matri\u021b\u0103.<\/li>\n<li>Proiectarea corect\u0103 a sistemului de canale:\u00a0Proiecta\u021bi canalele pentru a facilita curgerea u\u0219oar\u0103 \u0219i complet\u0103 a metalului.<\/li>\n<li>Monitorizarea parametrilor de injectare: Verifica\u021bi \u0219i regla\u021bi periodic presiunea, viteza \u0219i temporizarea.<\/li>\n<\/ul>\n<h2>Bavur\u0103<\/h2>\n<p><strong>Defini\u021bie:<\/strong>Bavura este un strat sub\u021bire de metal \u00een exces care se formeaz\u0103 pe marginile piesei turnate, deoarece metalul se scurge prin spa\u021biile dintre suprafe\u021bele de separa\u021bie ale matri\u021bei.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Presiune excesiv\u0103 de injectare:\u00a0Presiunea ridicat\u0103 \u00eempinge metalul \u00een afara cavit\u0103\u021bii matri\u021bei.<\/li>\n<li>Suprafe\u021be uzate ale matri\u021bei:\u00a0\u00cen timp, muchiile uzate ale matri\u021bei creeaz\u0103 spa\u021bii.<\/li>\n<li>For\u021b\u0103 de \u00eenchidere insuficient\u0103:\u00a0\u00cenchiderea slab\u0103 permite infiltrarea metalului.<\/li>\n<li>Matri\u021be nealiniate:\u00a0Alinierea incorect\u0103 creeaz\u0103 spa\u021biu prin care se poate scurge metalul.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Reglarea presiunii de injectare:\u00a0Reduce\u021bi presiunea excesiv\u0103 pentru a preveni rev\u0103rsarea.<\/li>\n<li>Repararea\/\u00eenlocuirea matri\u021belor uzate:\u00a0Reface\u021bi muchiile matri\u021bei sau \u00eenlocui\u021bi sculele uzate.<\/li>\n<li>Cre\u0219terea for\u021bei de \u00eenchidere:\u00a0Asigura\u021bi o for\u021b\u0103 suficient\u0103 pentru etan\u0219area suprafe\u021belor de separa\u021bie.<\/li>\n<li>Alinierea corect\u0103 a matri\u021bei:\u00a0Verifica\u021bi \u0219i regla\u021bi periodic alinierea pentru a elimina spa\u021biile.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>\u00centre\u021binerea regulat\u0103 a matri\u021bei:\u00a0Inspecta\u021bi frecvent planurile de separa\u021bie \u0219i suprafe\u021bele de etan\u0219are.<\/li>\n<li>Monitorizarea for\u021bei de \u00eenchidere:\u00a0Asigura\u021bi-v\u0103 c\u0103 matri\u021ba este fixat\u0103 ferm \u00een timpul produc\u021biei.<\/li>\n<li>Verificarea frecvent\u0103 a alinierii matri\u021bei:\u00a0Programa\u021bi reglaje periodice ale alinierii.<\/li>\n<li>Proiectarea corect\u0103 a planului de separa\u021bie:\u00a0Proiecta\u021bi planul de separa\u021bie astfel \u00eenc\u00e2t s\u0103 minimiza\u021bi traseele poten\u021biale de scurgere.<\/li>\n<\/ul>\n<h2><strong>Contrac\u021bie<\/strong><\/h2>\n<p><strong>Defini\u021bie:<\/strong>Contrac\u021bia este un defect \u00een care apar cavit\u0103\u021bi sau goluri \u00een interiorul piesei turnate ori pe suprafa\u021ba acesteia, din cauza solidific\u0103rii neuniforme \u00een timpul r\u0103cirii.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Grosime neuniform\u0103 a pere\u021bilor, care provoac\u0103 r\u0103cire neuniform\u0103.<\/li>\n<li>Alimentare insuficient\u0103 cu metal topit \u00een timpul solidific\u0103rii.<\/li>\n<li>Proiectare slab\u0103 a r\u0103cirii matri\u021bei.<\/li>\n<li>Presiune sc\u0103zut\u0103 de injectare sau timp prea scurt de men\u021binere a presiunii.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Optimiza\u021bi proiectarea piesei pentru a asigura grosimea uniform\u0103 a pere\u021bilor.<\/li>\n<li>Utiliza\u021bi alimentatoare sau maselote pentru a furniza material suplimentar \u00een timpul solidific\u0103rii.<\/li>\n<li>\u00cembun\u0103t\u0103\u021bi\u021bi r\u0103cirea matri\u021bei pentru a asigura solidificarea controlat\u0103.<\/li>\n<li>M\u0103ri\u021bi presiunea de injectare \u0219i prelungi\u021bi timpul de men\u021binere a presiunii.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Proiecta\u021bi piesele turnate cu grosime constant\u0103 a pere\u021bilor.<\/li>\n<li>Efectua\u021bi o analiz\u0103 adecvat\u0103 a r\u0103cirii matri\u021bei pentru a evita zonele fierbin\u021bi.<\/li>\n<li>Monitoriza\u021bi \u0219i regla\u021bi periodic parametrii procesului, precum presiunea \u0219i timpul de injectare.<\/li>\n<\/ul>\n<h2><strong>Incluziuni<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-658\" src=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Flash.jpg\" alt=\"Suprafa\u021b\u0103 texturat\u0103, cu linii curbe \u0219i ad\u00e2ncituri circulare, \u00een nuan\u021be estompate de verde \u0219i gri.\" width=\"800\" height=\"450\" srcset=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Flash.jpg 800w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Flash-300x169.jpg 300w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Flash-768x432.jpg 768w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Flash-18x10.jpg 18w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>Defini\u021bie:<\/strong>Incluziunile sunt particule neregulate de material str\u0103in, precum zgur\u0103 sau oxizi, captive \u00een piesa turnat\u0103, care provoac\u0103 sl\u0103biri interne sau defecte de suprafa\u021b\u0103.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Metal topit impur sau necurat.<\/li>\n<li>Zgur\u0103 sau resturi care nu au fost \u00eendep\u0103rtate \u00een timpul turn\u0103rii cu oala.<\/li>\n<li>Cur\u0103\u021barea necorespunz\u0103toare a cavit\u0103\u021bii matri\u021bei sau a sculelor.<\/li>\n<li>Amestecarea sau agitarea insuficient\u0103 a metalului topit.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Utiliza\u021bi \u00eenc\u0103rc\u0103tur\u0103 de cuptor de puritate ridicat\u0103 \u0219i cur\u0103\u021ba\u021bi temeinic oalele \u0219i sculele.<\/li>\n<li>\u00cendep\u0103rta\u021bi zgura \u0219i resturile de la suprafa\u021ba metalului topit \u00eenainte de turnare.<\/li>\n<li>Cur\u0103\u021ba\u021bi matri\u021bele \u0219i cavitatea formei \u00eenainte de fiecare ciclu de produc\u021bie.<\/li>\n<li>\u00cembun\u0103t\u0103\u021bi\u021bi procesul de purificare a metalului, de exemplu prin degazare sau filtrare.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Asigura\u021bi un proces de topire curat \u0219i controlat.<\/li>\n<li>Utiliza\u021bi agen\u021bi de demulare care reduc riscul de contaminare.<\/li>\n<li>Inspecta\u021bi \u0219i cur\u0103\u021ba\u021bi periodic cavitatea matri\u021bei \u0219i echipamentele.<\/li>\n<\/ul>\n<h2><strong>Fisuri<\/strong><\/h2>\n<p><strong>Defini\u021bie:<\/strong>Fisurile sunt fracturi liniare sau neregulate la suprafa\u021ba ori \u00een interiorul piesei turnate, care pot ap\u0103rea \u00een timpul sau dup\u0103 solidificare din cauza tensiunilor de \u00eentindere.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Solidificare neuniform\u0103 din cauza controlului slab al temperaturii matri\u021bei.<\/li>\n<li>Contrac\u021bie anormal\u0103 provocat\u0103 de grosimea neuniform\u0103 a pere\u021bilor.<\/li>\n<li>Tensiune intern\u0103 excesiv\u0103 sau dezechilibru \u00een timpul eject\u0103rii.<\/li>\n<li>Compozi\u021bie necorespunz\u0103toare a aliajului, cu un con\u021binut excesiv de elemente nocive.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Optimiza\u021bi temperatura matri\u021bei \u00een intervalul recomandat (180\u00b0C\u2013280\u00b0C).<\/li>\n<li>Proiecta\u021bi piesele turnate cu grosimea uniform\u0103 a pere\u021bilor pentru a preveni tensiunile de contrac\u021bie.<\/li>\n<li>Echilibra\u021bi for\u021bele de ejectare prin reglarea sau ad\u0103ugarea \u0219tifturilor de ejectare.<\/li>\n<li>Asigura\u021bi compozi\u021bia corect\u0103 a aliajului prin controlul elementelor nocive precum Fe.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Utiliza\u021bi instrumente de simulare pentru proiectarea unor structuri bine echilibrate.<\/li>\n<li>Men\u021bine\u021bi temperatura matri\u021bei constant\u0103 cu ajutorul unor sisteme adecvate de \u00eenc\u0103lzire.<\/li>\n<li>Monitoriza\u021bi regulat compozi\u021bia aliajului \u00een timpul elabor\u0103rii prin topire.<\/li>\n<\/ul>\n<h2><strong>Urme de tragere \u0219i aderen\u021ba metalului la matri\u021b\u0103<\/strong><\/h2>\n<p><strong>Defini\u021bie:<\/strong>Urmele de tragere sunt zg\u00e2rieturi sub form\u0103 de dungi, provocate de deteriorare sau frecare \u00een timpul eject\u0103rii; aderen\u021ba apare atunci c\u00e2nd metalul topit se lipe\u0219te anormal de matri\u021b\u0103 \u0219i las\u0103 depuneri de material.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Unghiuri de degajare insuficiente sau zone cu contraunghiuri pe piesa turnat\u0103.<\/li>\n<li>Suprafe\u021be deteriorate sau rugoase ale cavit\u0103\u021bii matri\u021bei.<\/li>\n<li>Temperatura excesiv\u0103 a metalului topit sau a matri\u021bei.<\/li>\n<li>Agent de demulare de calitate slab\u0103 sau lubrifiere insuficient\u0103.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>M\u0103ri\u021bi unghiurile de degajare \u0219i elimina\u021bi contraunghiurile.<\/li>\n<li>Repara\u021bi \u0219i lustrui\u021bi cavitatea matri\u021bei pentru a \u00eembun\u0103t\u0103\u021bi rugozitatea suprafe\u021bei.<\/li>\n<li>Regla\u021bi temperaturile metalului topit \u0219i ale matri\u021bei \u00een intervalele optime.<\/li>\n<li>Utiliza\u021bi agen\u021bi de demulare de \u00eenalt\u0103 calitate \u0219i lubrifia\u021bi corect matri\u021bele.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Optimiza\u021bi proiectarea piesei prin prevederea unor unghiuri de degajare adecvate.<\/li>\n<li>Efectua\u021bi regulat \u00eentre\u021binerea \u0219i lustruirea matri\u021bei.<\/li>\n<li>Monitoriza\u021bi \u0219i controla\u021bi temperaturile pentru a preveni supra\u00eenc\u0103lzirea.<\/li>\n<\/ul>\n<h2><strong>B\u0103\u0219ici<\/strong><\/h2>\n<p><strong>Defini\u021bie:<\/strong>B\u0103\u0219icile sunt umfl\u0103turi sau zone reliefate pe suprafa\u021ba piesei turnate, provocate de dilatarea gazelor captive sub suprafa\u021b\u0103 \u00een timpul solidific\u0103rii.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Proiectare slab\u0103 a aerisirii \u00een matri\u021b\u0103.<\/li>\n<li>Utilizarea excesiv\u0103 a agen\u021bilor de demulare sau a lubrifian\u021bilor.<\/li>\n<li>Degazare insuficient\u0103 a metalului topit.<\/li>\n<li>Temperatur\u0103 excesiv\u0103 a matri\u021bei, care \u00eei reduce rezisten\u021ba.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>\u00cembun\u0103t\u0103\u021bi\u021bi sistemul de aerisire prin ad\u0103ugarea canalelor de aerisire \u0219i de preaplin.<\/li>\n<li>Optimiza\u021bi cantitatea de agent de demulare \u0219i reduce\u021bi utilizarea excesiv\u0103.<\/li>\n<li>Efectua\u021bi un tratament adecvat de degazare \u00een timpul topirii.<\/li>\n<li>Reduce\u021bi temperatura matri\u021bei \u00een zonele problematice pentru a limita dilatarea gazelor.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Asigura\u021bi sisteme eficiente de aerisire \u0219i de preaplin \u00een matri\u021b\u0103.<\/li>\n<li>Men\u021bine\u021bi constante temperaturile matri\u021bei \u0219i ale metalului topit.<\/li>\n<li>Utiliza\u021bi agen\u021bi de demulare de \u00eenalt\u0103 calitate, aplica\u021bi corect.<\/li>\n<\/ul>\n<h2><strong>Deformare<\/strong><\/h2>\n<p><strong>Defini\u021bie:<\/strong>Deformarea apare atunci c\u00e2nd piesa turnat\u0103 se abate de la forma proiectat\u0103 din cauza tensiunilor interne sau a r\u0103cirii necorespunz\u0103toare.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Grosime neuniform\u0103 a pere\u021bilor, care provoac\u0103 solidificare neuniform\u0103.<\/li>\n<li>For\u021be de ejectare dezechilibrate.<\/li>\n<li>Acumulare excesiv\u0103 a tensiunilor interne.<\/li>\n<li>Proiectare slab\u0103 a r\u0103cirii matri\u021bei.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Proiecta\u021bi piesele turnate cu grosimea echilibrat\u0103 a pere\u021bilor.<\/li>\n<li>Optimiza\u021bi sistemele de ejectare pentru a asigura ejectarea uniform\u0103.<\/li>\n<li>Utiliza\u021bi sisteme de r\u0103cire controlat\u0103 pentru o solidificare uniform\u0103.<\/li>\n<li>Reduce\u021bi tensiunile interne prin optimizarea parametrilor procesului.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Efectua\u021bi simul\u0103ri pentru a anticipa \u0219i corecta tiparele de contrac\u021bie.<\/li>\n<li>Inspecta\u021bi \u0219i regla\u021bi regulat mecanismul de ejectare.<\/li>\n<li>Monitoriza\u021bi constan\u021ba sistemelor de r\u0103cire.<\/li>\n<\/ul>\n<h2><strong>Urme de curgere<\/strong><\/h2>\n<p><strong>Defini\u021bie:<\/strong>Urmele de curgere sunt linii ondulate sau decolor\u0103ri ale suprafe\u021bei, provocate de curgerea neregulat\u0103 a metalului topit \u00een timpul umplerii.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Vitez\u0103 sau presiune redus\u0103 de injectare.<\/li>\n<li>Temperatur\u0103 sc\u0103zut\u0103 a metalului topit.<\/li>\n<li>Control slab al temperaturii matri\u021bei.<\/li>\n<li>Proiectare slab\u0103 a sistemului de por\u021bi.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>M\u0103ri\u021bi viteza \u0219i presiunea de injectare pentru a asigura o curgere lin\u0103.<\/li>\n<li>Ridica\u021bi temperaturile metalului topit \u0219i ale matri\u021bei la nivelurile recomandate.<\/li>\n<li>Optimiza\u021bi temperatura matri\u021bei pentru a men\u021bine umplerea uniform\u0103.<\/li>\n<li>Reproiecta\u021bi sistemul de por\u021bi pentru o curgere mai bun\u0103 a metalului.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Monitoriza\u021bi \u0219i men\u021bine\u021bi temperaturile corecte \u00een timpul turn\u0103rii.<\/li>\n<li>Inspecta\u021bi \u0219i regla\u021bi periodic parametrii de injectare.<\/li>\n<li>Simula\u021bi tiparele de curgere pentru a optimiza proiectarea sistemului de por\u021bi.<\/li>\n<\/ul>\n<h2><strong>Delamin\u0103ri<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-654\" src=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Laminations.jpg\" alt=\"\" width=\"800\" height=\"450\" srcset=\"https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Laminations.jpg 800w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Laminations-300x169.jpg 300w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Laminations-768x432.jpg 768w, https:\/\/moldiecasting.com\/wp-content\/uploads\/2025\/01\/Laminations-18x10.jpg 18w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>Defini\u021bie:<\/strong>Delamin\u0103rile sunt defecte stratificate care apar atunci c\u00e2nd metalul topit nu fuzioneaz\u0103 corespunz\u0103tor, cre\u00e2nd regiuni stratificate \u0219i slabe.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Amplasarea necorespunz\u0103toare a por\u021bii, care perturb\u0103 curgerea lin\u0103 a metalului.<\/li>\n<li>Impurit\u0103\u021bi \u00een metalul topit.<\/li>\n<li>Metal topit rece sau temperatur\u0103 sc\u0103zut\u0103 a matri\u021bei.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Reproiecta\u021bi sistemele de por\u021bi \u0219i canale pentru a reduce \u00eentreruperile curgerii.<\/li>\n<li>Utiliza\u021bi metal topit curat, de \u00eenalt\u0103 calitate \u0219i f\u0103r\u0103 impurit\u0103\u021bi.<\/li>\n<li>Cre\u0219te\u021bi temperaturile metalului topit \u0219i ale matri\u021bei pentru fuziune complet\u0103.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Cur\u0103\u021ba\u021bi regulat cavitatea matri\u021bei.<\/li>\n<li>Optimiza\u021bi sistemele de por\u021bi \u0219i de injectare.<\/li>\n<li>Monitoriza\u021bi \u0219i controla\u021bi constant temperaturile.<\/li>\n<\/ul>\n<h2><strong>Retasuri<\/strong><\/h2>\n<p><strong>Defini\u021bie:<\/strong>Retasurile sunt ad\u00e2ncituri sau depresiuni pe suprafa\u021ba piesei turnate, provocate de alimentarea insuficient\u0103 \u00een timpul contrac\u021biei.<strong>Cauze:<\/strong><\/p>\n<ul>\n<li>Grosime neuniform\u0103 a pere\u021bilor, care duce la contrac\u021bie localizat\u0103.<\/li>\n<li>Presiune insuficient\u0103 \u00een timpul solidific\u0103rii.<\/li>\n<li>Aerisire slab\u0103, care \u00eempiedic\u0103 alimentarea corespunz\u0103toare.<\/li>\n<\/ul>\n<p><strong>Solu\u021bii:<\/strong><\/p>\n<ul>\n<li>Proiecta\u021bi piesele turnate cu grosimea uniform\u0103 a pere\u021bilor pentru a evita contrac\u021bia neuniform\u0103.<\/li>\n<li>M\u0103ri\u021bi presiunea de men\u021binere \u00een timpul solidific\u0103rii.<\/li>\n<li>\u00cembun\u0103t\u0103\u021bi\u021bi aerisirea pentru a facilita alimentarea.<\/li>\n<\/ul>\n<p><strong>Prevenire:<\/strong><\/p>\n<ul>\n<li>Efectua\u021bi analiza termic\u0103 \u00een timpul proiect\u0103rii matri\u021bei pentru a evita zonele fierbin\u021bi.<\/li>\n<li>Monitoriza\u021bi parametrii de injectare \u0219i constan\u021ba presiunii.<\/li>\n<\/ul>\n<h2>\u00centreb\u0103ri frecvente<\/h2>\n<h3>Care sunt diferitele tipuri de turnare sub presiune?<\/h3>\n<p>Turnarea sub presiune este un proces de fabrica\u021bie folosit pentru producerea pieselor metalice, cu variante adaptate anumitor materiale, forme \u0219i aplica\u021bii. Turnarea sub presiune la presiune \u00eenalt\u0103 \u0219i joas\u0103 este utilizat\u0103 frecvent pentru piese de \u00eenalt\u0103 precizie, \u00een timp ce turnarea gravita\u021bional\u0103 \u0219i turnarea sub vid reduc defecte precum porozitatea.<\/p>\n<p>Metodele avansate, precum turnarea prin presare (squeeze casting) \u0219i fabrica\u021bia aditiv\u0103 hibrid\u0103, ofer\u0103 rezisten\u021b\u0103 sporit\u0103, mai pu\u021bine defecte \u0219i flexibilitate mai mare de proiectare pentru aplica\u021bii specializate.<\/p>\n<h3>Pute\u021bi explica procesul de turnare sub presiune?<\/h3>\n<p>Procesul de turnare sub presiune presupune topirea metalului, injectarea acestuia \u00eentr-o matri\u021b\u0103 reutilizabil\u0103 din o\u021bel la presiune \u00eenalt\u0103, r\u0103cirea pentru solidificarea formei \u0219i apoi extragerea piesei finite.<\/p>\n<p>Procesul este rapid \u0219i precis, produce piese de \u00eenalt\u0103 calitate cu detalii fine \u0219i poate necesita opera\u021bii minime de finisare.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Turnare sub presiune, un proces de fabrica\u021bie utilizat pe scar\u0103 larg\u0103 pentru producerea pieselor metalice complexe, se confrunt\u0103 adesea cu defecte care pot compromite calitatea \u0219i func\u021bionalitatea produselor. Remedierea acestora presupune \u00een\u021belegerea cauzelor, aplicarea unor solu\u021bii eficiente \u0219i adoptarea m\u0103surilor preventive. Porozitate Defini\u021bie:Porozitatea este un defect \u00een care se formeaz\u0103 goluri mici sau bule \u00een [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":17087,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"Defecte de turnare sub presiune \u0219i solu\u021bii - Moldiecasting","_seopress_titles_desc":"Descoperi\u021bi defectele frecvente ale turn\u0103rii sub presiune, cauzele \u0219i solu\u021biile eficiente. Afla\u021bi cum pute\u021bi preveni problemele din turnarea metalelor pentru rezultate optime.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"iawp_total_views":2,"footnotes":""},"categories":[174],"tags":[],"class_list":["post-15340","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/posts\/15340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/comments?post=15340"}],"version-history":[{"count":3,"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/posts\/15340\/revisions"}],"predecessor-version":[{"id":17799,"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/posts\/15340\/revisions\/17799"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/media\/17087"}],"wp:attachment":[{"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/media?parent=15340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/categories?post=15340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/moldiecasting.com\/ro\/wp-json\/wp\/v2\/tags?post=15340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}