Musanganiswa wepurasitiki unoreva unsaturated polyester resin semuviri mukuru, uchiwedzera mushonga wekupisa, mushonga wekuburitsa mold, musanganiswa wekuzadza, musanganiswa wekudzikira kwepasi, musanganiswa wezvinhu zvinorema, nezvimwewo. Musanganiswa wepurasitiki wakafukidzwa nefirimu re polyethylene (PE). Pepa iri rinotsanangura muchidimbu kuumbwa uye kushandiswa kweSMC muzvikamu.
Kuumbwa kwePepa reKuumba Mapepa
SMC inoumbwa ne unsaturated polyester resin, crosslinking agent, initiator, filler, thickener, release agent, glass fiber, uye polymerization inhibitor. Pakati pazvo, zvikamu zvina zvekutanga zvinonyanya kupa chimiro chezvinhu zvezvigadzirwa uye kuwedzera simba. Zvikamu zvina zvekupedzisira zvinonyanya kuratidza hunhu hwekuwedzera kwekusimba, kuramba ngura, insulation, uye kugadzikana kwechimiro chechigadzirwa.
1. Unsaturated polyester resin uye crosslinking agents ndiwo muviri mukuru weSMC. Unsaturated polyester resins anowanzo kuve polycondensed kubva ku unsaturated dicarboxylic acids (kana anhydrides), saturated dicarboxylic acids (kana anhydrides), uye polyols. Ine zvimwe zvinhu zvemakanika uye simba, uye simba remukati rakaenzana. Crosslinking agent inonyanya kuita styrene. Mushure mekunge zviviri zvabatanidzwa, ndizvo zvinhu zvikuru zvekugadzirisa plasticity yechigadzirwa, izvo zvinoita basa rekubatanidza, kutsigira, kuenzana kwekutumira, uye kudzivirira.
2. Chinotangisa chinoita kuti resin necrosslinker zvigadzikane uye zviumbwe panguva yekuiswa resin paste. Basa rayo nderekuita kuti resin nedouble bond mu cross-linking monomer zvakaita se styrene copolymerize kuitira kuti SMC ikwanise kusimba uye kuumbwa mumold cavity.
3. Chinozadza chinotora chikamu chinodarika chikamu chimwe muzvitatu chechikamu chekuumba sheet uye chinogona kugadzirisa viscosity yechikamu chekuumba. Kazhinji chinoda kuva nehunhu hwegiravhiti yakaderera, kukosha kwekunyudzwa kwemafuta kwakaderera, maburi mashoma, kuramba ngura, uye mutengo wakaderera. Zvikamu zvekuzadza zvinowanzoshandiswa zvinonyanya kuve CaCO3, Al(OH)3, nezvimwewo.
4. Zvidhinha zvinopa SMC simba rekusviba kwakanyanya, risinganamati. Kugadzirwa kwezvishandiso zvekuumba jira nesimbi zvinoda kuti resin ive ne viscosity shoma kuti girazi fiber ne filler zvipinde zvakanaka ne resin. Uye compression molding inoda viscosity yakawanda. Saka, zvakakosha kuwedzera thickener usati watanga kugadzira glass fiber kuti uchinje viscosity yakaderera ye glass fiber impregnation kuita viscosity yakawanda isinganamati.
5. Chinhu chinoburitsa zvinhu chinodzivirira kuti chinhu chinoumba jira chisawirirane nepamusoro pesimbi. Chinhu chinoburitsa zvinhu chinogona kudzivirira kuti polyester resin isingasanganisike nepamusoro pesimbi panguva yekusanganiswa kwesimbi. Zvikurukuru mafuta acids kana munyu unomiririrwa ne zinc stearate. Kushandiswa zvakanyanya kunoderedza kushanda kwechigadzirwa. Kushandiswa kwakawanda kunoita kuti 1 ~ 3% yechigadzirwa chose ive nechokwadi chekuti chigadzirwa chacho chakanaka.
6. Magirazi anogona kuwedzera simba rekudzivirira ngura uye kudzivirira kuvharika kweSMC. Mapepa ekugadzira anowanzo sarudza magirazi akachekwa fiber mats sezvinhu zvinosimbisa. Kushandiswa zvakanyanya kuchaita kuti chigadzirwa chive chakapfava, uye kushandisa dose diki hakuzove nemhedzisiro yakajeka pachinhu ichi. Kushandiswa kwakajairika kunenge 20%. Nenzira iyi, chigadzirwa chinogona kusangana panguva imwe chete maitiro maviri ekugadzira extrusion uye compression molding.
7. Inhibitor inowedzera kugadzikana kweSMC uye inowedzera nguva yekuchengetera. Sezvo styrene yekutanga ichiora zvishoma nezvishoma, zvichikonzera polymerization ye resin, kuwedzera huwandu hwakakodzera hwe free radical scavenger (polymerization inhibitor) kunogona kuderedza kumhanya kwekuora kwe styrene uye kuwedzera nguva yekuchengetera kwayo. Inhibitors dzinowanzova benzoquinones uye polyvalent phenolic compounds.
Kushandiswa kweZvigadzirwa zveSheet Molding Compound
SMC ine zvakanakira zvekushanda zvakanaka kwemagetsi, kuramba ngura kwakasimba, dhizaini yeinjiniya yakareruka, iri nyore uye inochinjika, nezvimwewo. Hunhu hwayo hwemakanika hwakafanana nezvimwe zvinhu zvesimbi. Saka, inoshandiswa zvakanyanya muzvikamu zvisere zvakaita seindasitiri yemotokari, mota dzechitima, kuvaka, midziyo yemagetsi, uye kutaurirana (Tafura 1).
Pakati pavo, pakutanga, yainyanya kushandiswa semabhodhi ekudzivirira kupisa muminda yekuvaka, midziyo yemagetsi, uye yekutaurirana, uye tekinoroji yacho yakura zvishoma. Yakazoshandiswa muindasitiri yemotokari kutsiva chikamu chezvinhu zvesimbi nearuminiyamu zvemuviri kuderedza huremu hwemotokari.
Zvichitevera kuchengetedza simba uye kuderedza utsi hwemagetsi pari zvino pamwe nekugadzirwa kwemotokari itsva dzemagetsi, tekinoroji yezvigadzirwa zvemotokari inoramba ichikura kusvika pakureruka uye kwemhando yepamusoro. Kusvika pari zvino, kushandiswa kwezvinhu zveSMC kunogona kuonekwa kwese kwese muhupenyu hwezuva nezuva. Izvi zvinoratidzwa mukutaurirana kusina waya, mavharo emagetsi asingaputike, zvinhu zvinodzivirira pasi, dzimba dzekugezera, uye nzvimbo dzechitima dzinomhanya zvakanyanya.
Tafura 1. Minda misere mikuru yekushandisa uye minda yekuparadzanisa zvinhu zveSMC
| NO | Munda | Kupatsanura |
| 1 | Indasitiri yemotokari | Zvikamu zvesuspension, ma dashboard; zvikamu zvemuviri nezvikamu; zvikamu zvepasi pehood |
| 2 | Motokari yechitima | Mafuremu emahwindo; Zvigaro; Mapaneru engoro nedenga; Zvishandiso zvechimbuzi |
| 3 | Chikamu chekuvaka | Tangi remvura; Zvigadzirwa zvekugezera; Tangi reSeptic; Fomu rekuvaka; Zvikamu zvemukamuri rekuchengetera zvinhu |
| 4 | Midziyo yemagetsi nekutaurirana | Zvivharo zvemagetsi; zvikamu zvemagetsi nezvikamu (zvishandiso zvekudzivirira kupisa) |
| 5 | Imba yekugezera | Sinki; Midziyo yeshawa; Imba yekugezera yese; Zvishandiso zvehutsanana |
| 6 | Zvinhu zvepasi | Uriri hunodzivirira kutsvedza hunodzivirira kusimba |
| 7 | Chivharo chemagetsi chisingaputike | Zvigadzirwa zvemagoko zvemidziyo yemagetsi zvisingaputike |
| 8 | Kutaurirana pasina waya | Kanyanga yeFRP reflector, nezvimwewo |
Pfupisa
Iyo unsaturated polyester resin, crosslinking agent, initiator, uye filler mu sheet molding compound zvinopa chimiro chezvinhu zvechigadzirwa uye zvinowedzera simba rechimiro. Kukora, release agent, glass fiber, uye polymerization inhibitor zvinowedzera viscosity, corrosion resistance, insulation, uye structure stability kuchigadzirwa. Zvigadzirwa zvakadaro zvakashandiswa muminda misere mikuru kusanganisira indasitiri yemotokari nemotokari dzechitima. Pasi pemamiriro aripo ekuchengetedza simba, kuchengetedzwa kwezvakatipoteredza, uye kushandiswa kwesimba shoma, indasitiri yemotokari yakaisa zvinodiwa zvakanyanya zvezvinhu zveSMC nekuda kwezvinodiwa zvavo zvakareruka. Ndiyo simba guru rekusimudzira tekinoroji yeSMC.
Shandisamuchina wekudhinda we hydraulic unosanganiswakugadzira zvigadzirwa zvekugadzira pepa. Zhengxi inyanzvifekitori yekudhinda ye hydraulic muChina, tichipa michina yekudhinda yemhando yepamusoro. Taura nesu kuti uwane rumwe ruzivo.
Nguva yekutumira: Chivabvu-17-2023
