Chipangizo chomwe chimapereka chitetezo kugalimoto kapena dalaivala panthawi yamavuto.
Zaka makumi awiri zapitazo, ma bumpers akutsogolo ndi kumbuyo kwa magalimoto anali opangidwa ndi zitsulo. Anasindikizidwa muzitsulo zooneka ngati U zokhala ndi makulidwe opitilira 3mm. Pamwambapo ankagwiritsidwa ntchito ndi chrome ndi kugwedezeka kapena kuwotcherera pamodzi ndi mtengo wautali wa chimango. Ndi chitukuko cha mafakitale agalimoto, bumper yamagalimoto ngati chida chofunikira chachitetezo chilinso panjira yaukadaulo. Masiku ano magalimoto kutsogolo ndi kumbuyo bumpers kuwonjezera kukhalabe chitetezo choyambirira ntchito, komanso kufunafuna mgwirizano ndi umodzi ndi mawonekedwe a thupi, kufunafuna ake opepuka. Kuti akwaniritse cholinga ichi, magalimoto oyendetsa kutsogolo ndi kumbuyo amapangidwa ndi pulasitiki, omwe amadziwika kuti pulasitiki. Zaka makumi awiri zapitazo, ma bumpers akutsogolo ndi kumbuyo kwa magalimoto anali opangidwa ndi zitsulo. Anasindikizidwa muzitsulo za U-channel ndi makulidwe oposa 3mm. Pamwamba pake amathandizidwa ndi chrome ndikuwotchedwa kapena kuwotcherera pamodzi ndi njanji ya chimango. Ndi chitukuko cha mafakitale agalimoto, bumper yamagalimoto ngati chida chofunikira chachitetezo chilinso panjira yaukadaulo. Masiku ano magalimoto kutsogolo ndi kumbuyo bumpers kuwonjezera kukhalabe chitetezo choyambirira ntchito, komanso kufunafuna mgwirizano ndi umodzi ndi mawonekedwe a thupi, kufunafuna ake opepuka. Kuti akwaniritse cholinga ichi, magalimoto akutsogolo ndi kumbuyo amapangidwa ndi pulasitiki, yotchedwa pulasitiki bumpers. Bomba la pulasitiki limapangidwa ndi magawo atatu, monga mbale yakunja, zomangira ndi mtengo. Mbale yakunja ndi zinthu zotchingira zimapangidwa ndi pulasitiki, ndipo mtengowo umapangidwa ndi pepala lozizira lopiringizika lokhala ndi makulidwe pafupifupi 1.5 mm ndipo limapondedwa munjira yooneka ngati U; Chimbale chakunja ndi zinthu zomangira zimamangiriridwa pamtengo, womwe umamangiriridwa ku screw njanji ya chimango ndipo ukhoza kuchotsedwa nthawi iliyonse. Mtundu uwu wa bumper wa pulasitiki umagwiritsa ntchito pulasitiki, makamaka umagwiritsa ntchito mndandanda wa poliyesitala ndi mndandanda wa polypropylene wazinthu ziwiri, pogwiritsa ntchito njira yopangira jakisoni. Kunja palinso mtundu wa pulasitiki wotchedwa polycarbon ester, kulowerera mu aloyi zikuchokera, aloyi jekeseni akamaumba njira, processing kunja kwa bamper osati ali mkulu mphamvu okhwima, komanso ali ndi ubwino kuwotcherera, ndi ntchito ❖ kuyanika ndi zabwino, kuchuluka kwa zambiri mu galimoto. Pulasitiki bumper ali ndi mphamvu, kukhwima ndi kukongoletsa, kuchokera ku malo otetezeka, kugunda kwa galimoto kumatha kugwira ntchito yotchinga, kuteteza kutsogolo ndi kumbuyo kwa galimoto yamoto, kuchokera ku maonekedwe, akhoza kuphatikizidwa mwachibadwa ndi thupi mu chidutswa, chophatikizidwa mu lonse, ali ndi zokongoletsera zabwino, kukhala gawo lofunika kwambiri la maonekedwe a galimoto yokongoletsera.
