{"id":509,"date":"2018-10-16T21:45:19","date_gmt":"2018-10-16T13:45:19","guid":{"rendered":"https:\/\/plasticmoldco.com\/?p=509"},"modified":"2018-10-20T01:25:01","modified_gmt":"2018-10-19T17:25:01","slug":"what-is-injection-molding","status":"publish","type":"post","link":"https:\/\/www.plasticmoldco.com\/ro\/2018\/10\/16\/ce-este-turnarea-prin-injectie\/","title":{"rendered":"ce este turnarea prin injec\u021bie"},"content":{"rendered":"<p>[et_pb_section bb_built=\"1\u2033 fullwidth=\"off\" specialty=\"off\"][et_pb_row][et_pb_column type=\"4_4\u2033][et_pb_text _builder_version=\"3.10.2\u2033 border_width_all=\"3px\" border_color_all=\"#e5e5e5\u2033]<\/p>\n<h1>ce este turnarea prin injec\u021bie<\/h1>\n<p>\u00cen filmul The Graduate din 1967, dl Robinson \u00eei ofer\u0103 un singur sfat de carier\u0103 lui Benjamin Braddock, personajul interpretat de Dustin Hoffman: \"<strong>Materiale plastice<\/strong>.\" Se pare c\u0103 Robinson a avut o idee bun\u0103. \u0218tiin\u021ba industrial\u0103 a transform\u0103rii r\u0103\u0219inilor plastice \u00een lucruri utile prin procesul de turnare prin injec\u021bie a avut un impact extraordinar asupra industriei \u0219i asupra majorit\u0103\u021bii vie\u021bilor noastre.<\/p>\n<p>The\u00a0<strong>procesul de turnare prin injec\u021bie<\/strong>\u00a0a fost conceput\u0103 pentru prima dat\u0103 \u00een anii 1930 \u0219i s-a bazat ini\u021bial pe modele de turnare sub presiune a metalelor. Turnarea prin injec\u021bie ofer\u0103 multe avantaje fa\u021b\u0103 de metodele alternative de fabrica\u021bie, inclusiv pierderi minime de de\u0219euri (deoarece piesele de rebut pot fi topite \u0219i reciclate) \u0219i cerin\u021be minime de finisare. Turnarea prin injec\u021bie difer\u0103 de turnarea metalic\u0103 sub presiune prin faptul c\u0103 metalele topite pot fi pur \u0219i simplu turnate; r\u0103\u0219inile plastice trebuie injectate cu for\u021b\u0103.<\/p>\n<p>Procesul utilizeaz\u0103 mari\u00a0<strong>ma\u0219ini de turnare prin injec\u021bie<\/strong>, care \u00eenainteaz\u0103 r\u0103\u0219inile prin \u0219ase procese majore pentru a produce orice, de la piese de calculator la p\u0103ianjeni de Halloween din plastic. De\u0219i o ma\u0219in\u0103 de turnare prin injec\u021bie este o pies\u0103 complex\u0103 de echipament, aceasta const\u0103 din dou\u0103 elemente de baz\u0103, unitatea de injec\u021bie \u0219i unitatea de prindere.<\/p>\n<p>Procesul \u00eencepe cu o matri\u021b\u0103, care este fixat\u0103 sub presiune pentru a permite procesul de injectare \u0219i r\u0103cire. Apoi, r\u0103\u0219inile peletizate sunt introduse \u00een ma\u0219in\u0103, urmate de coloran\u021bii corespunz\u0103tori. R\u0103\u0219inile cad apoi \u00eentr-un butoi de injec\u021bie, unde sunt \u00eenc\u0103lzite p\u00e2n\u0103 la punctul de topire \u0219i apoi injectate \u00een matri\u021b\u0103 prin intermediul unui \u0219urub sau al unui dispozitiv de \u00eempingere.<\/p>\n<p>Urmeaz\u0103 apoi faza de locuire, \u00een care materialele plastice topite sunt con\u021binute \u00een matri\u021b\u0103, iar presiunea hidraulic\u0103 sau mecanic\u0103 este aplicat\u0103 pentru a se asigura c\u0103 toate cavit\u0103\u021bile din matri\u021b\u0103 sunt umplute. Materialele plastice sunt apoi l\u0103sate s\u0103 se r\u0103ceasc\u0103 \u00een interiorul matri\u021bei, care este apoi deschis\u0103 prin separarea celor dou\u0103 jum\u0103t\u0103\u021bi ale matri\u021bei. \u00cen etapa final\u0103, piesa din plastic este ejectat\u0103 din matri\u021b\u0103 cu ajutorul unor pini de ejec\u021bie. Este posibil ca piesa finalizat\u0103 s\u0103 con\u021bin\u0103 p\u0103r\u021bi str\u0103ine, numite \"runners\", care sunt t\u0103iate \u0219i reciclate. \u00centregul proces este ciclic, durata ciclului variind \u00eentre zece \u0219i 100 de secunde, \u00een func\u021bie de timpul de r\u0103cire necesar.<\/p>\n<p>Procesul de turnare prin injec\u021bie necesit\u0103 unele calcule complexe. Fiecare tip diferit de r\u0103\u0219in\u0103 are o valoare de contrac\u021bie care trebuie luat\u0103 \u00een considerare, iar matri\u021ba trebuie s\u0103 o compenseze. Dac\u0103 aceast\u0103 valoare nu este determinat\u0103 cu precizie, produsul final va avea dimensiuni incorecte sau poate con\u021bine defecte. De obicei, acest lucru este compensat mai \u00eent\u00e2i prin umplerea matri\u021bei cu r\u0103\u0219in\u0103, men\u021binerea acesteia sub presiune \u0219i apoi ad\u0103ugarea de r\u0103\u0219in\u0103 pentru a compensa contrac\u021bia. Alte complica\u021bii pot include piese arse ca urmare a unei temperaturi prea ridicate a topiturii, deformare ca urmare a unei temperaturi de suprafa\u021b\u0103 inegale sau umplere incomplet\u0103 ca urmare a unei curse de injec\u021bie prea lente.<\/p>\n<p><strong>Forme de injec\u021bie<\/strong>\u00a0\u00een sine pot fi surprinz\u0103tor de scumpe, uneori mai mari de $100.000. Cu toate acestea, dac\u0103 cantitatea de piese dorit\u0103 este suficient de mare, costul matri\u021bei devine relativ nesemnificativ, iar piesele din plastic rezultate au pre\u021buri foarte rezonabile. Unele matri\u021be sunt realizate cu mai multe cavit\u0103\u021bi; aceste matri\u021be cu mai multe cavit\u0103\u021bi cost\u0103 mai mult dec\u00e2t cele cu o singur\u0103 cavitate, dar datorit\u0103 eficien\u021bei crescute a produc\u021biei, costul pe pies\u0103 este minimizat.<\/p>\n<p><strong>Turnare prin injec\u021bie<\/strong>\u00a0poate fi utilizat cu o varietate de r\u0103\u0219ini din plastic. Cele mai populare r\u0103\u0219ini pentru acest tip de turnare includ: polipropilen\u0103 (PP), polietilen\u0103 (PE) \u0219i ABS. Fiecare r\u0103\u0219in\u0103 are propriul set de avantaje \u0219i dezavantaje \u0219i sunt alese \u00een func\u021bie de caracteristicile dorite ale piesei finale.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>","protected":false},"excerpt":{"rendered":"<p><div class=\"et_pb_row et_pb_row_0 et_pb_row_empty\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div> what is injection molding In 1967 film The Graduate, Mr. Robinson offered a single word of career advice to Benjamin Braddock, the character played by Dustin Hoffman: \u201cPlastics.\u201d It would seem that Robinson had the right idea. The industrial science of transforming plastic resins into useful things through the process of injection molding, has [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[13,9],"tags":[],"class_list":["post-509","post","type-post","status-publish","format-standard","hentry","category-mold-indstry-blogy-1","category-news2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>what is injection molding - Plastic Mold | China Mold Maker<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.plasticmoldco.com\/ro\/2018\/10\/16\/ce-este-turnarea-prin-injectie\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"what is injection molding - Plastic Mold | China Mold Maker\" \/>\n<meta property=\"og:description\" content=\"what is injection molding In 1967 film The Graduate, Mr. Robinson offered a single word of career advice to Benjamin Braddock, the character played by Dustin Hoffman: \u201cPlastics.\u201d It would seem that Robinson had the right idea. 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