Kutheni le nto i-nayiloni yobushushu obuphezulu ithandwa ukuba isetyenziswe kwiNjini yemoto kuMacala oMda?

Ngenxa yokwenziwa kweplastiki ye-elektroniki, iinxalenye zeemoto, kunye neendawo zeemoto, iimfuno eziphezulu zibekwe ekusebenzeni kwenayiloni kunye nokumelana nobushushu obuphezulu. Oku kwavula isandulelo sophando nophuhliso kunye nokusetyenziswa kwenayiloni yobushushu obuphezulu.

Ifayibha yeglasi ehambayo ephezulu eyomelezwe lobushushu obuphezulu benayiloni yePPA yenye yeentlobo ezintsha ezitsale umdla kakhulu, kwaye sesinye sezixhobo ezitsha ezikhula ngokukhawuleza nezinexabiso eliphantsi. Ifayibha yeglasi yomelezwe ubushushu obuphezulu benayiloni ehlanganisiweyo esekwe kubushushu obuphezulu benayiloni yePPA kulula ukwenza ukuchaneka okuphezulu, ukumelana nobushushu obuphezulu kunye neemveliso ezinamandla kakhulu. Ngokukodwa kwiimveliso zeperipheral ze-injini yemoto, ekufuneka zijongane neemfuno zokuguga ezingqongqo, inayiloni yobushushu obuphezulu ngokuthe ngcembe iye yaba lolona khetho lulungileyo lwemathiriyeli ye-injini yemoto. Yintoni ieyodwamalunga nenayiloni yobushushu obuphezulu?

I-1, amandla omatshini agqwesileyo

Xa kuthelekiswa nenayiloni ye-aliphatic yendabuko (PA6/PA66), inayiloni yobushushu obuphezulu ineenzuzo ezicacileyo, ezibonakaliswa ikakhulu kwiimpawu ezisisiseko zemveliso kunye nokumelana nobushushu. Xa kuthelekiswa namandla omatshini asisiseko, inayiloni yobushushu obuphezulu inomxholo ofanayo wefayibha yeglasi kwindawo. Iphezulu ngama-20% kunenayiloni ye-aliphatic yesintu, enokubonelela ngezisombululo ezikhaphukhaphu ngakumbi kwiimoto.

I-Automotive thermostatic housing eyenziwe ngenayiloni yobushushu obuphezulu.

I-2, ukusebenza kokuguga kobushushu obuphezulu

Phantsi kwesiseko sobushushu be-thermal deformation ye-1.82MPa, ubushushu obuphezulu benayiloni ye-30% yeglasi ifayibha eqinisiweyo inokufikelela kuma-280 °C, ngelixa i-aliphatic yemveli PA66 30% GF imalunga ne-255 °C. Xa iimfuno zemveliso zinyuka ukuya kuma-200 °C, kubanzima kwiinayiloni ze-aliphatic ukuhlangabezana neemfuno zemveliso, ngakumbi iimveliso ze-injini ze-peripheral bezikwiqondo lobushushu eliphezulu kunye nobushushu obuphezulu ixesha elide. Kwindawo emanzi, kwaye kufuneka imelane ne-corrosion ye-oyile yomatshini.

I-3, ukuzinza okugqwesileyo komgangatho

Izinga lokufunxa kwamanzi kwinayiloni ye-aliphatic liphezulu kakhulu, kwaye isantya sokufunxa samanzi sinokufikelela kwi-5%, okukhokelela kuzinzo oluphantsi kakhulu lwe-dimensional yemveliso, engafanelekanga kakhulu kwiimveliso ezithile ezichanekileyo. Umyinge wamaqela e-amide kwinayiloni yobushushu obuphezulu uyancitshiswa, izinga lokufunxa kwamanzi likwasisiqingatha seso senayiloni ye-aliphatic eqhelekileyo, kwaye uzinzo lwe-dimensional lungcono.

I-4, ukuchasana kweekhemikhali okugqwesileyo

Kuba iimveliso zepheripheral zeenjini zemoto zihlala zinxibelelana neearhente zeekhemikhali, iimfuno eziphezulu zibekwe ekuxhathisweni kweekhemikhali, ngakumbi ukubola kwepetroli, ifriji kunye nezinye iikhemikhali zinefuthe elibi kwi-aliphatic polyamide, ngelixa ubushushu obuphezulu. Ulwakhiwo lwenayiloni lwenza olu kusilela, ngoko ke ukubonakala kwenayiloni yobushushu obuphezulu kuye kwaphakamisa indawo yokusetyenziswa kwe-injini ukuya kwinqanaba elitsha.

Iimoto ze-cylinder head covers ezenziwe nge-nylon yobushushu obuphezulu.

Izicelo zoshishino lweemoto

Kuba iPPA inokubonelela ngamaqondo obushushu obuguquguqukayo obungaphezulu kwe-270°C, yiplastiki yobunjineli efanelekileyo kwiindawo ezikwaziyo ukumelana nobushushu kwimizi-mveliso yeemoto, oomatshini, kunye ne-elektroniki/yombane. Kwangaxeshanye, iPPA ikwafanelekile kumalungu ekufuneka agcine ingqibelelo yesakhiwo kumaqondo obushushu exesha elifutshane.

I-automotive hood eyenziwe nge-nylon yobushushu obuphezulu

Kwangaxeshanye, ukufakwa kweplastiki kwezahlulo zentsimbi ezifana neenkqubo zepetroli, iinkqubo zokukhupha umoya, kunye neenkqubo zokupholisa kufutshane ne-injini ziye zathatyathelw’ indawo ziintlaka ze-thermosetting ukuze ziphinde zisetyenziswe, kwaye iimfuno zemathiriyeli zingqongqo. Ukuxhathisa ubushushu, ukuqina, kunye nokumelana nemichiza yeeplastiki zobunjineli benjongo yangaphambili ayinakukwazi ukuhlangabezana neemfuno.

Ukongeza, uthotho lwenayiloni lobushushu obuphezulu bugcina iingenelo ezaziwayo-kakuhle zeplastiki, ezizezi, ukucutha lula, ukucutha, ukukhululeka koyilo lwasimahla lweendawo ezidityanisiweyo ezisebenzayo, kunye nokunciphisa ubunzima kunye nengxolo kunye nokuxhathisa ukubola.

Ekubeni inayiloni yobushushu obuphezulu inokumelana namandla aphezulu, ubushushu obuphezulu kunye nezinye iindawo ezirhabaxa, ifanelekile kakhulu eiindawo ze-injini (ezifana nezigqumathelo ze-injini, iiswitshi kunye neziqhagamshelo) kunye neenkqubo zothumelo (ezifana neekheji zokuthwala), iinkqubo zomoya (ezifana nenkqubo yokulawula umoya wokukhupha umoya) kunye nezixhobo zokungenisa umoya.

Nangona kunjalo, iipropathi ezigqwesileyo zenayiloni yobushushu obuphezulu zinokuzisa izibonelelo ezininzi kubasebenzisi, kwaye xa uguqula ukusuka kwi-PA6, i-PA66 okanye i-PET/PBT izixhobo ukuya kwi-PPA, akukho mfuneko yokuguqula i-molds, njl., ngoko ifanelekile kwizicelo ezahlukeneyo. ifuna ukumelana nobushushu obuphezulu. Kukho amathemba abanzi.