TheSMC zvinhu zvekuumba maitirondiyo inonyanya kushanda mugirazi fiber yakasimbiswa plastiki / composite zvinhu zvekuumba maitiro.Iyo SMC molding process ine akawanda mabhenefiti, akadai: yakaringana chigadzirwa saizi, yakatsetseka pamusoro, yakanaka chigadzirwa chitarisiko uye saizi kudzokorora, chimiro chakaomarara chinogonawo kuumbwa panguva imwe chete, yechipiri kugadzirisa haidi kukuvadza chigadzirwa, nezvimwe zvakadaro, zvakaipa kuremara kuchaonekwawo muSMC molding yekugadzira maitiro, ayo anonyanya kuratidzwa mune zvinotevera zvikonzero:
(I)Kushaikwa kwezvinhu: Kushaikwa kwezvinhu zvinoreva kuti zvikamu zvakaumbwa zveSMC hazvina kunyatsozadzwa, uye nzvimbo dzekugadzira dzinonyanya kutariswa pamicheto yezvigadzirwa zveSMC, kunyanya midzi uye kumusoro kwemakona.
(a) Kuderera kwezvinhu zvishoma
(b) SMC zvinhu zvine mvura isina kusimba
(C) Kusakwana kwemidziyo kumanikidza
(d) Kurapa nekukurumidza
Generation mechanism uye matanho:
①Mushure meiyo SMC zvinhu zvaiswa plastiki nekupisa, iyo melt viscosity yakakura.Pamberi pekubatana-kubatanidza uye kusimba kuita kwapera, hapana nguva yakakwana, kudzvanywa, uye vhoriyamu yekuzadza gomba rekuumbwa nekunyungudika.
②) Nguva yekuchengetedza yeSMC yekuumba zvinhu yakarebesa, uye styrene inoputika yakawandisa, zvichikonzera kuderera kukuru kwekuyerera kweSMC molding material.
③Iyo resin paste haina kunyudzwa mufiber.Iyo resin paste haigone kutyaira iyo fiber kuyerera panguva yekuumbwa, zvichikonzera kushomeka kwezvinhu.Nekushaikwa kwezvinhu zvinokonzerwa nezvikonzero zviri pamusoro, mhinduro yakananga ndeyekubvisa zvinhu izvi zvakaumbwa kana uchicheka zvinhu.
④Kusakwana kwekudya kunokonzera kushomeka kwezvinhu.Mhinduro ndeyokuwedzera huwandu hwekudya zvakakodzera.
⑤Kune mhepo yakawandisa uye zvinhu zvakawanda zvinovhiringika muzvinhu zvekuumba.Mhinduro ndeyokuwedzera zvakakodzera nhamba yekupedza;zvakakodzera kuwedzera nzvimbo yekudya uye kuputika kweimwe nguva yenguva yekuchenesa mold;zvakakodzera kuwedzera kuumba kumanikidza.
⑥Kudzvanywa kwacho kwanonoka, uye zvinhu zvakaumbwa zvapedza kubatanidza uye kurapa isati yazadza mhango.⑦ Kana iyo mold tembiricha yakakwira zvakanyanya, kuchinjika-kubatanidza uye kurapa maitiro kuchaenderera mberi, saka tembiricha inofanira kudzikiswa zvakakodzera.
(2)Stoma.Kune anogara aripo kana asina kujairika maburi madiki pamusoro pechigadzirwa, mazhinji acho anogadzirwa kumusoro uye nepakati matete madziro echigadzirwa.
Generation mechanism uye matanho:
①Iyo SMC yekuumba zvinhu ine huwandu hukuru hwemhepo uye inovhuvhuta yemukati yakakura, uye iyo yekubuda haina kutsetseka;iyo thickening mhedzisiro yeSMC zvinhu haina kunaka, uye gasi haigone kuburitswa kunze.Izvo zvikonzero zviri pamusoro apa zvinogona kunyatsogadziriswa nekubatanidzwa kwekuwedzera nhamba yevheji uye kuchenesa mold.
②Nzvimbo yekudyisa yakakura kwazvo, zvakakodzera kuderedza nzvimbo yekudyisa inogona kudzorwa.Mukuita basa chairo, zvinhu zvevanhu zvinogona kukonzera trachoma.Semuyenzaniso, kana kudzvanyirirwa kwacho kuchiri kumberi, zvinogona kunetsa kuti gasi rakaputirwa mukomboni yekuumbwa ribviswe, zvichikonzera kukanganisa kwepamusoro senge pores pamusoro pechigadzirwa.
(3)Warpage uye deformation.Chikonzero chikuru ndechekurapwa kusina kuenzana kwemuumbi wekuumba uye kuderera kwechigadzirwa mushure mekudhirowa.
Generation mechanism uye matanho:
Munguva yekurapa maitiro eresin, chimiro chemakemikari chinoshanduka, zvichiita kuti vhoriyamu iwedzere.Kufanana kwekuporeswa kunoita kuti chigadzirwa chiwedzere kuchinjika kudivi rekutanga rakapora.Chechipiri, iyo yekupisa yekuwedzera coefficient yechigadzirwa yakakura kupfuura iyo yesimbi mold.Kana chigadzirwa chacho chatonhodzwa, imwe-nzira yayo shrinkage rate yakakura kudarika imwe-nzira yekupisa shrinkage rate ye mold.Kuti izvi zviitike, nzira dzinotevera dzinoshandiswa kugadzirisa dambudziko:
① Deredzai musiyano wetembiricha pakati pepamusoro nepasi mold, uye ita kuti tembiricha igove sezvazvinogona;
②Shandisa zvigadziriso zvekutonhodza kudzikamisa deformation;
③Kuwedzera zvakafanira kuumbwa kwechigadzirwa, kuwedzera kuumbwa kwechigadzirwa, uye kuderedza shrinkage yechigadzirwa;
④ Rebesa nguva yekuchengetedza kupisa zvakakodzera kubvisa kushushikana kwemukati.
⑤Gadzirisa kurapa shrinkage mwero weSMC zvinhu.
(4)Blisting.Iyo semicircular bulge pamusoro pechigadzirwa chakarapwa.
Generation mechanism uye matanho:
Zvingave izvo zvinhu hazvina kupora zvakakwana, tembiricha yenzvimbo yakakwira zvakanyanya, kana kuti kusvibiswa kwemukati mune izvo zvinhu zvakakura, uye misungo yemhepo pakati pemashizha, iyo inoita semicircular bulge pamusoro pechigadzirwa.
(①Paunenge uchiwedzera kuumbwa kwekumanikidza
(②Wedzera nguva yekuchengetedza kupisa
(③) Dzikisa tembiricha yeforoma.
④Deredza nzvimbo yekusunungura
(5)Muvara wepamusoro wechigadzirwa hauna kuenzana
Generation mechanism uye matanho:
①Tembiricha yekuumbwa haina yunifomu, uye chikamu chacho chakanyanya kukwirira.Kupisa kwe mold kunofanira kudzorwa zvakanaka;
②Kushaikwa kwemvura yekuumbwa kwezvinhu, zvichikonzera kusaenzana kwefiber kugovera, kazhinji kunogona kuwedzera kumanikidza kuumba kuwedzera kunyungudika kwekunyunguduka;
③Pigment uye resin haigone kusanganiswa zvakanaka mukuita kwekusanganisa kwemavara.
Nguva yekutumira: Chivabvu-04-2021
