Mbale yosefera ndi gawo lofunika kwambiri logwirira ntchito pa makina otsekera kuti amalize ntchito yotsekera. Chida chilichonse chosefera chiyenera kusankha mbale yosefera yomwe ikukwaniritsa zofunikira zake.

Makhalidwe osiyanasiyana a zipangizo, kapangidwe kosiyana ka mbale ya sieve, zipangizo ndi magawo osiyanasiyana a makina osieve zonse zimakhudza mphamvu yowunikira, magwiridwe antchito, kuthamanga kwa ntchito ndi moyo wa chophimba chogwedezeka. Sieve mbale kuti mupeze zotsatira zabwino kwambiri zowunikira.

Malinga ndi kukula kwa tinthu ta zinthu zomwe zikusefedwa komanso zofunikira paukadaulo wa ntchito yowunikira, mbale zosefedwa zimatha kugawidwa m'mitundu iyi:
  
1. Chophimba chotchinga
    
Chophimba cha ndodo chimapangidwa ndi gulu la ndodo zachitsulo zokonzedwa motsatizana ndipo zili ndi mawonekedwe enaake opingasa.
Ndodozo zimayikidwa motsatizana, ndipo nthawi yomwe pakati pa ndodozo ndi kukula kwa mabowo otchingira. Zotchingira ndodo nthawi zambiri zimagwiritsidwa ntchito pa zotchingira zokhazikika kapena zotchingira zolemera, ndipo ndizoyenera kutchingira zinthu zokhala ndi tinthu tating'onoting'ono toposa 50mm.

2. Chophimba chophimba
      
Mapepala odulira sieve nthawi zambiri amabowoledwa kuchokera m'mabowo ozungulira, amakona anayi kapena amakona anayi pa mbale zachitsulo zokhala ndi makulidwe a 5-12mm. Poyerekeza ndi mbale yozungulira kapena yamakona anayi, pamwamba pa sieve ya sieve yamakona anayi nthawi zambiri imakhala ndi malo ogwirira ntchito, kulemera kopepuka komanso ntchito yabwino. Ndi yoyenera kukonza zinthu zomwe zili ndi chinyezi chambiri, koma kulondola kwa sieve ndi kochepa.
  
3. Mbale yophimba maukonde yoluka:
    
Mbale yotchingira maukonde yolukidwa imalukidwa ndi waya wachitsulo wokanikizidwa ndi chomangira, ndipo mawonekedwe a dzenje la sikelo ndi lalikulu kapena lamakona anayi. Ubwino wake ndi: kulemera kopepuka, kutseguka kwakukulu; ndipo poyesa, chifukwa waya wachitsulo uli ndi kusinthasintha kwina, umagwedezeka pafupipafupi, kotero kuti tinthu tating'onoting'ono tomwe timamatira ku waya wachitsulo timagwa, motero timathandizira kuti ntchito yotchingira igwire bwino ntchito. Ndi yoyenera kutchingira zinthu zapakati ndi zazing'ono. Komabe, imakhala ndi moyo waufupi.

4. Chinsalu chotchinga
  
Mbale yotchingira yopangidwa ndi zibowo imapangidwa ndi chitsulo chosapanga dzimbiri ngati sieve bar. Pali mitundu itatu ya kapangidwe kake: ulusi, welded ndi luning.
Mawonekedwe a gawo la sieve la mbale ya sieve ndi ozungulira, ndipo m'lifupi mwa malowo mutha kukhala 0.25mm, 0.5mm, 0.75mm, 1mm, 2mm, ndi zina zotero.
Mbale yosefera yokhala ndi mipata ndi yoyenera kuchotsedwa madzi, kuchotsedwa kukula ndi kuchotsedwa milingo pakati pa tirigu wabwino.

5. Mbale ya sefa ya polyurethane:
      
Mbale ya sieve ya polyurethane ndi mtundu wa mbale ya sieve yolimba ya polymer, yomwe ili ndi kukana kwabwino kwa kukwawa, kukana mafuta, kukana hydrolysis, kukana mabakiteriya, komanso kukana ukalamba. Mbale ya sieve singathe kuchepetsa kwambiri kulemera kwa zida, kuchepetsa mtengo wa zida, kutalikitsa moyo wautumiki, komanso kuchepetsa phokoso. Imagwiritsidwa ntchito kwambiri m'migodi, zitsulo, kaboni wa malasha, coke, kutsuka malasha, mafuta, mankhwala ndi mafakitale ena.
      
Maonekedwe a mabowo omwe ali mu mbale ya sieve ya polyurethane ndi awa: mano ophimbira, mabowo ang'onoang'ono, mabowo ataliatali, mabowo ozungulira, ndi mtundu wa malo olowera. Kukula kwa magiredi a zipangizo: 0.1-80mm.

Kaya mbale ya sieve imamangidwa bwino komanso yolimba ikayikidwa pa bokosi la sieve zimakhudza kwambiri magwiridwe antchito a sieve komanso moyo wa ntchito yake. Kawirikawiri, zophimba zoboola ndi zophimba zotchingira zimakhazikika ndi matabwa; ma meshes oluka okhala ndi ma diameter ang'onoang'ono a ma mesh ndi zophimba zoboola zokhala ndi makulidwe osakwana 6mm amakhazikika ndi zokokera; ma meshes oluka okhala ndi ma diameter a ma mesh opitilira 9.5mm ndi makulidwe akulu. Chophimba choboola cha 8mm chimakhazikika pokanikiza ndi zomangira.