Sheet molding compound inoreva unsaturated polyester resin semuviri mukuru, kuwedzera kurapa, mold release agent, filler, low shrinkage agent, thickener, etc. Molding compound yakavharwa ne polyethylene (PE) firimu.Iri bepa rinonyanya kutsanangura muchidimbu kuumbwa uye kupatsanura mashandisirwo eSMC.
Sheet Molding Compound's Kuumbwa
SMC inoumbwa neunsaturated polyester resin, crosslinking agent, initiator, filler, thickener, release agent, glass fiber, uye polymerization inhibitor.Pakati pavo, mapoka mana ekutanga anonyanya kupa humbowo hwezvinhu zvezvigadzirwa uye kuwedzera simba.Iwo mana ekupedzisira mapoka anonyanya kuitirwa zvinhu zvekuwedzera viscosity, corrosion resistance, insulation, uye kugadzikana kwechigadzirwa.
1. Unsaturated polyester resin uye crosslinking agents ndiwo muviri mukuru we SMC.Unsaturated polyester resins inowanzoitwa polycondensed kubva kune unsaturated dicarboxylic acids (kana anhydrides), saturated dicarboxylic acids (kana anhydrides), uye polyols.Iine mamwe maitiro emagetsi uye simba, uye simba remukati rakafanana.Iyo crosslinking agent inonyanya kuve styrene.Mushure mekunge maviri aya akabatanidzwa, ndiwo maturusi makuru ekurapa mapurasitiki echigadzirwa, ayo anotamba basa rekubatanidza, kutsigirwa, kutapurirana chiyero, uye kudzivirira.
2. Iyo initiator inokonzeresa kuti resin uye crosslinker irape uye igadzire mune resin paste nhanho.Basa rayo rinonyanya kugadzira resin uye chisungo chakapetwa kaviri muchinjika-inobatanidza monoma senge styrene copolymerize kuitira kuti SMC igone kusimba uye kuumbwa mumhango yekuumbwa.
3. Iyo yekuzadza inotora zvinopfuura chikamu chimwe muzvitatu chepepa rekugadzira pepa uye inogona kugadzirisa viscosity yemuumbi wekuumba.Iyo inowanzoda kuve nehunhu hwekudzika kwakananga giravhiti, yakaderera mafuta adsorption kukosha, mashoma pores, corrosion resistance, uye mutengo wakaderera.Iwo anowanzo shandiswa mafiller components akanyanya CaCO3, Al(OH)3, zvichingodaro.
4. Makobvu anopa SMC yakakwirira-viscosity, isina-namira pfuma.Kugadzirira kweshizha uye yakawanda yekuumba makomisheni kunoda yakaderera viscosity yeresin kuti ifambise kupindira kwegirazi fiber uye kuzadza neresin.Uye compression molding inoda yakakwira viscosity.Naizvozvo, zvinodikanwa kuti uwedzere gobvu pamberi pemaitiro ekuumba kushandura yakaderera viscosity yegirazi fiber impregnation kuita yakakwirira viscosity isinganamate.
5. Mushonga wekusunungura unodzivirira pepa rekuumba jira kubva pakuva nehukama nesimbi mold pamusoro.Iyo yekuburitsa mumiririri inogona kudzivirira iyo isina unsaturated polyester resin kubva pakubatana nepamusoro pesimbi mold panguva yepurasitiki process yemusanganiswa weresin.Kunyanya-refu-cheni mafuta asidhi kana munyu anomiririrwa zinc stearate.Kushandisa zvakanyanya kuchaderedza nyore nyore kushanda kwechigadzirwa.Iko kushandiswa kwese kunotora 1 ~ 3% yechigadzirwa chakazara kuti ive nechokwadi chemhando yechigadzirwa.
6. Girazi fibers inogona kukwidziridza kusadzivirirwa kwecorrosion uye insulation zvimiro zveSMC.Sheet molding compound inowanzosarudza yakachekwa girazi fiber mats sechinhu chekusimbisa.Kushandisa zvakanyanya kuchaita kuti chigadzirwa chive nyore, uye kushandiswa kwechidimbu chiduku hakuzove nekusimbisa kwakajeka kwechigadzirwa.Iyo yakawanda inoshandiswa ndeye 20%.Nenzira iyi, chigadzirwa chinogona panguva imwe chete kusangana nemaitiro maviri e extrusion molding uye compression molding.
7. Inhibitor inowedzera kugadzikana kweSMC uye inowedzera nguva yekuchengetedza.Sezvo iyo initiator styrene ichizoora zvishoma nezvishoma, zvichikonzera polymerization yeresin, kuwedzera huwandu hwakakodzera hwemahara radical scavenger (polymerization inhibitor) inogona kudzikisa kukurumidza kwekuora kwe styrene uye kurebesa nguva yayo yekuchengetedza.Inhibitors inowanzova benzoquinones uye polyvalent phenolic compounds.
Kushandiswa kweSheet Molding Compound Zvigadzirwa
SMC ine mabhenefiti ekuita kwakanakisa kwemagetsi, yakasimba corrosion resistance, lightweight, easy and flexible engineering design, etc. Michina yayo inofananidzwa nezvimwe zvinhu zvesimbi.Naizvozvo, inoshandiswa zvakanyanya muminda misere senge indasitiri yemotokari, mota dzechitima, kuvaka, midziyo yemagetsi, uye kutaurirana (Tafura 1).
Pakati pavo, mukutanga, yainyanya kushandiswa muchimiro chekudzivirira mapuranga muminda yekuvaka, midziyo yemagetsi, uye kutaurirana, uye tekinoroji yakakura.Yakazoshandiswa muindasitiri yemotokari kutsiva chikamu chesimbi nealuminium alloy zvinhu zvemuviri kuderedza huremu hwemotokari.
Pasi pemashure ekuchengetedza simba razvino uye kuderedzwa kwekuburitsa uye kuvandudzwa kwemotokari nyowani dzesimba, tekinoroji yezvigadzirwa zvemotokari inoramba ichikura yakananga kuremerwa uye yemhando yepamusoro.Kusvika ikozvino, kushandiswa kwezvinhu zveSMC zvinogona kuonekwa kwese kwese muhupenyu hwezuva nezuva.Inotaridzwa mukutaurirana kusina waya, kuputika-kuvharwa kwemagetsi, pasi pekudzivirira zvinhu, dzimba dzekugezera, uye nzvimbo dzenjanji dzinomhanya.
Tafura 1 Masere makuru ekushandisa uye kupatsanura minda yeSMC zvinhu
| NO | Munda | Segmentation |
| 1 | Auto industry | Zvikamu zvekumisa, dashboards;nhengo dzemuviri uye zvikamu;under-hood zvikamu |
| 2 | Motokari yechitima | Window frames;Seats;Zvingoro zvekutakura uye sirin'i;Zvimbudzi zvinoumba |
| 3 | Chikamu chekuvaka | Tangi yemvura;Bath products;Septic tank;Kuvaka formwork;Zvikamu zvekamuri yekuchengetera |
| 4 | Zvishandiso zveMagetsi uye Nhaurirano | Zvivharo zvemagetsi;zvinhu zvemagetsi uye zvikamu (insulation zvishandiso) |
| 5 | Bathroom | Sink;Shower equipment;Yese yekugezera;Utsanana zvikamu |
| 6 | Ground material | Anti-slip anti-static pasi |
| 7 | Kuputika kwemagetsi kunovharirwa | Zvigadzirwa zvemagetsi zvinoputika-zviputi |
| 8 | Wireless kutaurirana | FRP reflector antenna, nezvimwewo |
Pfupisa
Iyo isina unsaturated polyester resin, crosslinking agent, initiator, uye filler mushizha rekuumbwa rinopa chimiro chechinhu chechigadzirwa uye kuwedzera kusimba kwechimiro.Thickener, mumiriri wekuburitsa, girazi fiber, uye polymerization inhibitor inowedzera viscosity, corrosion resistance, insulation, uye kugadzikana kwechimiro kune chigadzirwa.Zvigadzirwa zvakadaro zvakaiswa muminda mikuru misere inosanganisira indasitiri yemotokari nemotokari dzechitima.Pasi pemamiriro azvino ekuchengetedza simba, kuchengetedza kwezvakatipoteredza, uye kushomeka kwesimba rekushandisa, indasitiri yemotokari yakaisa mberi uye yepamusoro zvinodiwa zveSMC zvinhu nekuda kwehuremu hwazvo zvinodiwa.Ndiro rinonyanya kufambisa simba rekuvandudza tekinoroji yeSMC.
Shandisa iyocomposite hydraulic press machinekudhinda mashizha ekuumba zvinhu zvakasanganiswa.Zhengxi inyanzvihydraulic press fekitori muChina, ichipa michina yemhando yepamusoro.Bata nesu kuti uwane ruzivo.
Nguva yekutumira: May-17-2023
