Ke hobane'ng ha mela e ntšo e hlaha khafetsa ho extruder? Sengoliloeng sena se u ruta mokhoa oa ho tseba kapele hore na se bakoa ke bothata ba barrel kapa screw.

Mehala e metšo khafetsa ho li-extruder e bakoa haholo-holo ke tšilafalo ea thepa e tala, li-deposit tsa khabone lisebelisoa, le likarolo tse tsofetseng. Litaba tsena li hloka lipatlisiso le ho fumana sebaka ho latela mehato e ka tlase.

1. Litaba tse tala le tse thusang

Sena ke sesosa se atileng haholo 'me se lokela ho etelletsoa pele.

Litšila tse tala: Lintho tse ntšo tsa kantle ho naha, joalo ka lerole, lithōle tsa tšepe, kapa li-masterbatches tse ling, li ka kenngoa ka har'a thepa e tala nakong ea tlhahiso, polokelo kapa lipalangoang.

Mongobo o tala kapa ho senyeha: Mongobo o mongata oa thepa e tala o ka lebisa ho carbonization nakong ea mocheso o phahameng oa mocheso, o bakang matheba a matšo. Ho senyeha ho tloha polokelong ea nako e telele ho ka boela ha fella ka ho thehoa ha thepa e chesitsoeng e ntšo.

Masterbatch kapa mathata a tlatsetso: Phatlalatso e mpe ea masterbatch e ka fella ka likaroloana tse ntšo tsa agglomerated. Keketso e feteletseng ea li-additives (joalo ka li-antioxidants) e ka lebisa ho carbonization ka mocheso o phahameng.

2. Li-deposit tsa carbon ka har'a thepa: Ka mor'a tšebeliso ea nako e telele, lisebelisoa tse setseng li ka lula habonolo ka har'a barrel, screw, kapa hlobo, e lebisang ho carbonization le ho thehoa ha mela e ntšo.

Ho hloekisoa ho sa fellang nakong ea ho theoha: Lintho tse setseng ka har'a barrel le screw ha li hloekisoe ka ho feletseng ka mor'a ho matha pele. Ha mochine o tsosolosoa, thepa ena e setseng e khabone ka mocheso o phahameng 'me e kopane le thepa e ncha. Litlhophiso tse sa nepahalang tsa parameter ea tlhahiso: Lithempereichara tsa Extrusion li phahame haholo, li feta mocheso o tsitsitseng oa mocheso oa thepa e tala, e bakang ho chesa haholo le carbonization ka barrel.

Lebelo la screw ha le tsamaellane le sekhahla sa phepelo: Lebelo la ho fepa le butle haholo, ha lebelo la screw le lebelo haholo, le etsa hore thepa e lule e le ka har'a moqomo nako e telele haholo, e lebisang ho senyeha ha mocheso le khabone.

3. Likarolo tsa Thepa li Apara kapa li Hlōleha

Litšila tsa tšepe tse tsoang likarolong tse tsofetseng kapa litšila tse hlahisoang ke litiiso tse senyehileng le tsona li ka baka mela e metšo.

Screw and Barrel Wear: Kamora ts'ebeliso ea nako e telele, lekhalo lipakeng tsasekoti le moqomoeketsa, ho etsa hore ho be bonolo hore lintho tse bonahalang li qabeletsoe le carbonized ka lekhalo. Phofo ea tšepe e hlahisoang ke ho apara e ka kopanya ka har'a thepa, ea etsa mela e ntšo.

Mathata a Mold: Li-deposit tsa carbon kapa li-scratches ka har'a mocha oa ho phalla ha hlobo li ka etsa hore thepa e tšoasoe 'me e be carbonized nakong ea ho phalla. Litiiso tsa hlobo tse senyehileng li ka lumella litšila tse kantle ho kena mocheng oa phallo.

Sefa kapa Tšenyo: Lisefe tse qhibilihang tse e-s'o nkeloe sebaka ka nako e telele li ka koaleha, e leng se lebisang ho phallo e mpe ea thepa le ho futhumatsa ho feteletseng le carbonization. Lisefe tse senyehileng li ka lumella litšila ho kena ka har'a hlobo ka kotloloho. Ho kgothaletswa ho hlahloba ka tatellano ea "lisebelisoa tse tala → ho hloekisa lisebelisoa → tlhahlobo ea lisebelisoa". Pele nka sebaka sa thepa e ncha e tala bakeng sa tlhahlobo. Ka mor'a ho felisa bothata ba thepa e tala, qhaqholla le ho hloekisa moqomo, screw le hlobo, 'me qetellong u hlahlobe boemo ba lisebelisoa tse kang screw le filter.

Ha polasetiki e qhibiliha e ntse e tsoela pele ka mokhoa oohle oa ho tsamaisa, ho hatella le ho qhibiliha ka haresekoti, esita le ho se phethahale ho honyenyane ka holim'a metsi ho ka fetoha sebaka sa ho tsoala li-black streaks. Bokhopo ba bokaholimo bo tloaelehileng likurufung tse tloaelehileng bo etsa hore ho be bonolo hore thepa e tšoasoe likheong tsa khoele nakong ea ho potoloha ka lebelo le phahameng. Sena, hammoho le ho futhumatsa khafetsa, ho etsa lihlahisoa tse chesitsoeng, tse qetellang li baka li-streaks tse ntšo sehlahisoa se felileng.

Khetho ea thepa le eona ke ea bohlokoa. Li-screw tsa rona li entsoe ka tšepe ea boleng bo holimo ea 38CrMoALA nitrided alloy. Sena se etsoa ka kalafo ea matsatsi a supileng ea ho tima le ho kenya nitriding, ho fella ka lera le letenya la 0.50-0.70mm le boima ba bokaholimo ba HV950-1050. Thepa ena ea thepa e tiisa hore ho na le khanyetso e ntle ea ho apara esita le mocheso o pota-potileng 200 ° C, e lelefatsa bophelo ba ts'ebeletso ea screw ka bonyane karolo ea bohlano ha e bapisoa le lihlahisoa tse tloaelehileng. Sena se thibela ho bokellana ha thepa likhutlong tse shoeleng ka lebaka la ts'ebeliso ea nako e telele.

Ka ho sebetsa ka mokhoa o nepahetseng, sekoti se fihlela sekhahla sa seipone sa Ra0.4 microns, makhetlo a 'maloa ho feta maemo a indasteri. Sena se fetolela phapang ea bolelele ba li-micron tse sa feteng 0.4 millimeter ka bolelele ba sekorufu, 1/200 feela bophara ba moriri oa motho. Sebaka sena se boreleli haholo se fokotsa haholo kotsi ea ho boloka thepa le ho felisa tsela ea li-streaks tse ntšo qalong.