Lo mugqa uhlinzeka ngokwenza amasokhethi epayipi le-PVC okwenziwa ngesandla nokuzenzakalelayo okuhlanganisa amasokhethi “U” noma “R”.Ikakhulukazi ilandela ulayini we-extrusion, ohambisana nemishini yokufaka izikulufu.Ingasebenza futhi ngokwehlukana.Umshini wethu wokubethela unohhavini ababili bokushisisa.Ngaphambi kokukhala, amapayipi azoshiswa kuhhavini lokushisa.Futhi lapho amapayipi ethumela insimbi, elinye ipayipi lizothunyelwa ekushisiseni.Ngakho-ke, umugqa unokukhipha okuphezulu kanye nesivinini sokusebenza esisheshayo.