Iyo bumper yemota ndechimwe chezvishandiso zvakakura mumotokari.Iine mabasa matatu makuru: kuchengeteka, kushanda uye kushongedzwa.
Pane nzira nhatu huru dzekudzikisa huremu hwemabhampa emotokari: zvinyoro zvinyoro, zvimiro zvekugadzirisa, uye kugadzira maitiro ekugadzira.Huremu huremu hwezvinhu zvinowanzoreva kutsiva izvo zvepakutanga nezvinhu zvine density yakaderera pasi pemamwe mamiriro, senge simbi yakagadzirwa nepurasitiki;iyo dhizaini yekugadziridza dhizaini yeakareruka bumper inonyanya kutetepa-madziro;nzira itsva yekugadzira ine micro-foaming.Tekinoroji nyowani senge zvinhu uye gasi-inobatsira kuumba.
Mapurasitiki anoshandiswa zvakanyanya muindasitiri yemotokari nekuda kwehuremu hwawo huremu, kuita kwakanaka, kugadzira kuri nyore, corrosion resistance, kukanganisa kupikisa, uye rusununguko rwakakura mukugadzira, uye ari kuwedzera kushandiswa mumidziyo yemotokari.Huwandu hwepurasitiki inoshandiswa mumotokari yave imwe yenzira yekuyera huwandu hwebudiriro yeindasitiri yemotokari yenyika.Parizvino, ipurasitiki inoshandiswa mukugadzirwa kwemotokari munyika dzakabudirira yasvika 200kg, inoverengera inenge 20% yehuwandu hwemotokari.
Mapurasitiki anoshandiswa muindasitiri yemotokari yeChina kunonoka.Mumotokari dzehupfumi, huwandu hwemapurasitiki i50 ~ 60kg chete, yepakati uye yepamusoro-kirasi mota, 60 ~ 80kg, uye dzimwe mota dzinogona kusvika 100kg.Pakugadzira marori epakati nepakati muChina, mota yega yega Shandisa ingangoita 50kg yepurasitiki.Kushandiswa kwepurasitiki yemotokari imwe neimwe inongova 5% kusvika 10% yehuremu hwemotokari.
Izvo zvinhu zvebumper zvinowanzove nezvinotevera zvinodiwa: yakanaka kukanganisa kuramba uye kunaka kwemamiriro ekunze.Yakanaka pendi adhesion, yakanaka fluidity, yakanaka yekugadzirisa kuita uye mutengo wakaderera.
Saizvozvo, PP zvinhu pasina mubvunzo ndiyo inodhura-inoshanda sarudzo.PP zvinhu ipurasitiki-yechinangwa chepurasitiki ine mashandiro akanaka, asi PP pachayo ine kuderera-kupisa kwekuita uye kupikisa kwemaitiro, haidziviriri kupfeka, iri nyore kuchembera uye ine hurombo husina kugadzikana.Naizvozvo, yakagadziridzwa PP inowanzo shandiswa kugadzirwa kwemota bumper.zvinhu.Parizvino, zvinhu zvakakosha zvepolypropylene mota bumpers zvinowanzogadzirwa nePP, uye chimwe chikamu cherabha kana elastomer, inorganic filler, masterbatch, zvekubatsira uye zvimwe zvinhu zvinosanganiswa uye kugadziriswa.
Matambudziko anokonzerwa nemadziro akatetepa e bumper uye mhinduro
Iko kuonda kwebumper kuri nyore kukonzeresa warping deformation, uye iyo warping deformation ndiyo mhedzisiro yekuburitswa kwemukati kushushikana.Mabhampa akatetepa anogadzira kushushikana kwemukati nekuda kwezvikonzero zvakasiyana panguva dzakasiyana-siyana dzekuumba jekiseni.
Kazhinji, zvinonyanya zvinosanganisira kutarisisa kushushikana, kushushikana kwekupisa, uye mold kuburitsa kushushikana.The orientation stress ndeyekukwezva kwemukati kunokonzerwa nefibers, macromolecular cheni kana zvikamu mukunyunguduka kwakanangana mune imwe nzira uye kusakwana kuzorora.Iyo dhigirii yekumisikidza ine hukama nehupamhi hwechigadzirwa, tembiricha yekunyungudika, tembiricha yekuumbwa, kudzvanywa kwejekiseni, uye nguva yekugara.Iyo yakakura iyo ukobvu, iyo yakaderera dhigirii yekutarisa;iyo yakakwirira tembiricha yekunyunguduka, iyo yakaderera dhigirii yekutarisa;iyo yakakwirira yekushisa kwe mold, iyo yakaderera dhigirii yekutarisa;iyo yakakwirira yekumanikidza kwejekiseni, iyo yakakwirira dhigirii yekutarisa;kana nguva yekugara yakarebesa, ndipo panobva pakurawo mwero wekutarisa .
Kushushikana kwekushisa kunokonzerwa nekupisa kwepamusoro kwekunyunguduka uye kuderera kwekushisa kwe mold kuumba kusiyana kukuru kwekushisa.Iko kutonhora kwekunyunguduka pedyo negomba re mold inokurumidza uye mechanical stress yemukati inoparadzirwa zvisina kuenzana.
Kushungurudzika kwedemoulding kunonyanya kukonzerwa nekushaikwa kwesimba uye kusimba kwe mold, iyo elastic deformation pasi pechiito chejekiseni pressure uye ejection simba, uye kusaenzana kugovera kwesimba kana chigadzirwa chabviswa.
Kutetepa kwebhampa kunewo dambudziko rekuomerwa nekudzikisa.Nemhaka yokuti gauji yemadziro emadziro iduku uye ine zvishoma zvishoma zve shrinkage, chigadzirwa chinonamatira zvakasimba kune mold;nekuti kumhanya kwejekiseni kwakakwira, nguva yekugara inochengetwa.Kudzora kwakaoma;madziro akaonda uye mbabvu zvakare anogona kukuvara panguva yekudhirowa.Kuvhurika kwakajairwa kwe mold kunoda muchina wejekiseni kuti upe simba rekuvhura mold rakakwana, uye simba rekuvhura mold rinofanirwa kukurira kupokana pakuvhura mold.
Nguva yekutumira: Kubvumbi-23-2023