Mhando dzePlastiki Extrusion Process

Iyo yepurasitiki extrusion process inokamurwa mumhando nomwe dzakasiyana zvichienderana nemashandisirwo chaiwo.

(a) Sheet/Firimu Extrusion

Mune iyi extrusion process, iyo yakanyungudutswa yepurasitiki zvinhu inoburitswa kuburikidza neyakafafa kufa.Mipumburu yekutonhodza inoshandiswa kuona ukobvu hweshizha/firimu uye magadzirirwo aro.Ukobvu hwepepa hunogona kuwanikwa muhupamhi hwe 0.2 kusvika 15 mm.Pepa rakatetepa rakatsetseka kana firimu rezvinhu zvepurasitiki zvinogona kugadzirwa.Kazhinji, polystyrene plastiki inoshandiswa seyakasvibira mune pepa extrusion process.

(b) Yakaputika Firimu Extrusion

Mukuita firimu rinoputika, iyo inofa yakafanana necylinder yakatwasuka ine denderedzwa profile.Plastiki yakanyungudutswa inodhonzwa kumusoro kubva padhiri nepeya yenip rollers.Mhepo yakamanikidzwa inoshandiswa kufuridzira chubhu.Kutenderedza dhiri, mhepo-inoiswa mhete.Chinangwa chemhepo-mhete ndechekutonhodza firimu parinofamba richikwira kumusoro.Pakati pekufa, pane mhepo inopinza kubva iyo yakamanikidzwa mhepo inogona kumanikidzwa kupinda pakati peiyo denderedzwa chimiro, uye kugadzira bubble.Iyo extruded denderedzwa yemuchinjikwa chikamu inogona kuwedzerwa 2-3 nguva dzefa dhayamita.Mabhubhu anoputsika nerubatsiro rwendiro inodonha.Iyo nip rolls inopepeta bubble kuita kaviri layer yefirimu inodaidzwa kuti layflat.Ukobvu hwemadziro hwefirimu hunogona kudzorwa nekushandura kumhanya kweiyo nip rollers.Iyo layflat inogona kuputirwa muchimiro chemupumburu kana kucheka kuita maumbirwo anodiwa.Rutivi rwepasi pe layflat rwakanamwa nekushandiswa kwekupisa, uye cheka kuyambuka kumusoro kusvika kuvhurika;saka inogona kushandiswa kugadzira bhegi repurasitiki.Iyo dhayamita yekufa inogona kusiyana kubva pa1 kusvika ku300 masendimita.Kazhinji, polyurethane plastiki inoshandiswa mukuita uku.

(c) Pamusoro peJacketing Extrusion

Izvi zvinonziwo wire coating process.Mukuita uku, waya isina chinhu inodhonzwa nepakati pedhishi.Kune marudzi maviri akasiyana eextrusion tooling anoshandiswa kupfekwa pamusoro pewaya kureva kumanikidza kana kupfekedza jekete.Kana kushamwaridzana kwepedyo kana kunamatira kunodiwa pakati pewaya uye kupfeka, kushandiswa kwekushandisa kunoshandiswa.Kana kunamatira kusingadiwi, jekete tooling inoshandiswa.Nekudzvanyirira midziyo, waya inodzoserwa mukati mekufa, uko inosangana nepurasitiki yakanyungudutswa pakumanikidza kwakanyanya.Zvekushandisa jekete, waya inotambanuka uye plastiki yakanyungudutswa ichaita chivharo pawaya mushure mekufa.Waya yakashama inodyiswa kuburikidza nedhifi uye haisangani yakananga nepurasitiki yakanyungudutswa kusvika yasiya mufi.Musiyano mukuru pakati pejaketi uye kumanikidza midziyo ndiyo nzvimbo yewaya nekuremekedza kufa.

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(d) Tubing Extrusion

Mukuita uku, purasitiki yakanyungudutswa inoburitswa kuburikidza nekufa uye maburi emuchinjiko zvikamu zvinoumbwa nekuisa mandrel mukati mekufa.Tube ine maburi akawanda inogona zvakare kugadzirwa kune chaiyo maapplication, nekuisa akati wandei mandrels pakati pekufa.

(e) Coextrusion

Coextrusion ndiyo extrusion maitiro ekugadzira akawanda akaturikidzana ezvinhu panguva imwe chete.Inoshandiswa kuisa imwe kana mamwe mitsara pamusoro pezvigadziko kuti uwane chaiwo zvivakwa senge ultraviolet absorption, grip, matte pamusoro, uye simba rekuratidzira, nepo base zvinhu zvakanyanya kukodzera kune mamwe maapplication, semuenzaniso kupikisa uye kuita kwemaitiro.Inogona kushandiswa pane chero maitiro akadai seyakavhuvhuta firimu, pamusoro pejaketi, tubing, sheet / firimu extrusion.Mukuita uku, maviri kana anopfuura maextruder anoshandiswa kuendesa zvinhu izvo zvinosanganiswa kuita imwechete inofa iyo inoburitsa zvinhu muchimiro chaunoda.Ukobvu hwakatsetseka hunodzorwa nekumhanya uye saizi yemunhu ega extruder achiendesa zvinhu.

(f) Extrusion Coating

Extrusion coating inoshandiswa kugadzira imwe layer pane iripo rollstock yepepa, foil kana firimu.Semuenzaniso, kuvandudza mvura inodzivirira yepepa polyethylene coating inoshandiswa.Iko kushandiswa kweextrusion coating kurongedza kwemvura, mapepa emifananidzo, mahamvuropu, masaga anonamira efotereza kurongedza uye kurongedza kwekurapa.Kazhinji, polyethylene uye polypropylene inoshandiswa.