Diskripsen bilong ol prodak
Straksa na As tingting bilong Twin-Skru Kaikai Ekstruda
Ol 'twin-screw food extruders i wok long mekim bikpela wok insait long 'modern food industry'. Gutpela wok bilong ol na ol i ken mekim planti wok i mekim ol i kamap wanpela gutpela tul bilong planti kampani bilong wokim kaikai. Orait, wanem samting tru em i wanpela 'twin-screw food extruder? Yumi ken lukluk gut.
(I) Ol samting bilong straksa
Wanpela 'twin-screw food extruder i gat ol bikpela samting olsem 'barrel', 'extrusion screw', 'cutting system', na 'control system'. Ol i save disainim na wokim dispela barel long wanpela standet modul we longpela bilong en i 4d, na em inap long sanap strong long presa inap long 30 MPa na tempereja inap long 300 digri. Bilong mekim baret i stap longpela taim, ol i wokim long ol samting we i no inap bagarap na i no inap bagarap. Ol barel bilong ol kain kain model i ken bung wantaim na mekim i kamap longpela long inapim ol spesifik prodaksen nid. Ausaitpela hap, we i save helpim ol masin, ol i wokim long 'stainless steel', na i no inap bagarap na i isi long wasim. Namel leia i save raunim ol samting bilong hatim na kol, na i save bosim gut tempereja taim ol i wok long wokim ol samting. Ol i wokim 'core layer' long kain kain 'alloy' na ol spesel samting, na i no inap bagarap.
Extrusion screw em i wanpela bikpela samting bilong wanpela twin-screw food extruder. Planti taim, tupela skru i save stap klostu sait insait long baret. Long lukluk long posisen bilong ol, ol skru i ken stap olsem 'intermeshing' o 'non-intermeshing', na 'intermeshing' i bruk i go long 'partially intermeshing' na 'fully intermeshing'. Folem rot bilong skru i tanim, ol skru i ken stap olsem co-roteting o counter-roteting, wantaim counter-roteting i bruk i go long inwad na ausait rotesen. Ol kain kain skru i gat ol narapela narapela pasin long sait bilong karim ol samting, miksim, na katim.
Ol i save yusim 'cutting system' long katim ol samting we ol i rausim long 'die' i go long wanpela longpela o seip we ol i laikim long kamapim wanpela kaikai we i inapim ol samting ol i laikim. Kontrol sistem i gat wok long bosim gut ol kain kain samting insait long wok bilong 'extrusion', olsem spit bilong skru, tempereja, presa, na 'feed rate', long mekim gutpela prodaksen proses na gutpela kwaliti bilong prodak.
(II) Opereting Prinsipel
Rot bilong wok bilong wanpela 'twin-screw food extruder em i olsem, sapos skru i save tantanim, dispela samting i save senis long bodi bilong en, olsem karim, katim, miksim, na hatim. Taim dispela samting i go insait long baret long 'feed port', skru i save subim em i go het long baret. Long dispela proses, rotesen bilong skru i save putim ol samting long strongpela 'shearing' na 'mixing'. Long wankain taim, masin bilong hatim baret i save hatim samting, na mekim temperaja bilong en i go antap na wara i save kamap steam hariap, na dispela i save kamapim bikpela presa insait long samting. Taim ol i putim dispela samting i go insait long 'die', presa i save go daun wantu tasol, na dispela i mekim na wara insait long dispela samting i save go aut hariap tru, na i mekim volium bilong en i go bikpela hariap, na long dispela rot em i save go bikpela na kukim dispela samting. Long pinis, bihain long ol i prosesim long rot bilong katim sistem, ol i kisim ol kaikai prodak we i gat kain kain seip na spesifikesen.
Kisim wanpela 'co-rotating twin-screw extruder olsem eksampel. Rotesen bilong ol skru i kamapim ol bikpela- na liklik-presa zon insait long baret. Dispela samting i ron long bikpela presa zon i go long liklik presa zon long tupela sait: wanpela, na kamapim tupela C-sep strim arere long wol bilong barel long sait bilong skru rotesen, we i makim bikpela ron; narapela, i kamapim wanpela 'counterflow' i go insait long spes namel long ol 'meshing screws'. Dispela 'counterflow' i save kamap bikos lephan skru i save pulim samting i go insait long 'meshing gap', na raithan skru i save pulim i go ausait. Dispela i mekim na ol samting i go het long wanpela "∞" seip, na senisim ron bilong en. Dispela narakain 'flow pattern' i no helpim tasol long miksim na mekim ol samting i kamap wankain tasol tu i save kamapim 'grinding' (olsem, 'shearing') na 'rolling' namel long ol tit bilong skru, na dispela i save kamapim wanpela 'calendering effect'. Ol 'counter-rotating twin-screw extruders i save yusim tupela skru we i gat wankain sais tasol i gat narapela narapela rot bilong flai. Difrens namel long rotesen i go insait na i go ausait em i stap long ples bilong ol presa zon. Ol twin skru we i save tanim i go insait i save kamapim bikpela presa antap na liklik presa long daunbilo, na dispela i save kamapim bikpela presa tru long inlet taim samting i go insait long tupela skru, na dispela i mekim hat long givim kaikai. Nau yet, dispela 'inward-rotating counter-rotating pattern i no save kamap planti taim. Ol twin skru we i save tanim i go ausait i save kamapim liklik presa antap na bikpela presa long daunbilo, na dispela i helpim long givim kaikai. Tasol, taim yumi skelim wantaim ol 'co-rotating twin screws, C-shaped flow we i kamap insait long ol skru i pasim ol samting long muv long wanpela skru i go long narapela, na dispela i daunim tru mak bilong miks bilong ol samting. Na tu, ol inap long klinim ol yet i no gutpela na i no stap gut olsem ol 'co-rotating twin screws.
Long tok sot, olsem wanpela gutpela masin bilong prosesim kaikai, ol 'twin-screw food extruders, wantaim narakain straksa bilong en, gutpela wok bilong en, na planti gutpela samting bilong en, i save mekim bikpela wok tru insait long indastri bilong kaikai.
