Nkhani ku Korea
Pulasitiki jakisoni Mbali 'Wall Makulidwe Mapangidwe Amakampani Aku Korea Auto Companies
![](https://www.djmolding.com/wp-content/uploads/2023/03/1200x350-022.jpg)
Ziwalo zapulasitiki zimatumizidwa kunja kwagalimoto, ndipo kulimba kwake kumakhudza moyo wonse ndikuyendetsa bwino, kotero opanga aku Korea Auto amagula zida zapulasitiki mwamphamvu kwambiri. Makampani Opanga Magalimoto adzagwiritsa ntchito zida zapulasitiki zambiri m'galimoto, makampani ajakisoni aku Korea aku Korea sangathe kupereka zambiri, ndipo opanga ma Auto awa adzagula zida zapulasitiki kutsidya kwa nyanja, monganso DJmolding waku China.
Zigawo zapulasitiki ndizofunika kwambiri pagalimoto, ndiye mungapangire bwanji makhoma a ma jakisoni apulasitiki amakampani aku Korea Auto? Tsopano, DJmolding ikuwonetsani mapangidwe a mawonekedwe a jekeseni wa pulasitiki.
Tanthauzo la makulidwe a khoma
Makulidwe a khoma ndi gawo lofunikira la magawo apulasitiki. Ngati kunja kwa mbali za pulasitiki kumatchedwa khoma lakunja, mkati mwake amatchedwa khoma lamkati, ndiye kuti pali mtengo wamtengo wapatali pakati pa makoma akunja ndi amkati. Mtengo umatchedwa makulidwe a khoma. Mtengo womwe unalowa pamene chipolopolocho chikuchotsedwa pa pulogalamuyo panthawi ya mapangidwe apangidwe anganenenso kuti ndi makulidwe a khoma.
Ntchito ya khoma makulidwe
Kwa khoma lakunja la zinthu
Khoma lakunja la ziwalo lili ngati khungu lakunja la ziwalo. Khoma lamkati ndi structural mafupa a ziwalo. Zosiyanasiyana maonekedwe angapezeke ndi pamwamba mankhwala akunja khoma mbali. Khoma lamkati limangogwirizanitsa zomanga (nthiti, zitsulo zomangira, zomangira ndi zina) pamodzi ndikupangitsa mphamvu zina ku ziwalozo. Pakadali pano, zida zina zitha kudzazidwa panthawi yakuumba matenda. Palibe zofunikira zenizeni zamakoma amkati ndi akunja (kuzizira, msonkhano). Kawirikawiri, zimapangidwira kuti zikhale ndi mphamvu zokwanira kuti ziteteze ziwalo zamkati kuti zisawonongeke kapena kusokonezedwa ndi chilengedwe.
Kwa ziwalo zamkati za mankhwala
Monga cholumikizira kapena cholumikizira, palibe zofunikira zolimba za makoma amkati ndi akunja, omwe amatha kukhazikitsa zida zina (nthiti, mipiringidzo, ma buckles ndi zina) pakhoma lakunja malinga ndi momwe zilili. Komabe, chifukwa cha kupanga bwino (makamaka amatanthauza pamene zisankho za kutsogolo ndi kumbuyo zimalekanitsidwa, kuti asunge mbali zapulasitiki mu nkhungu yakumbuyo, kutsogolo kwa nkhungu, zomwe khoma lakunja liyenera kupangidwa mophweka momwe zingathere. Ngati ayi, kusintha drafting ngodya ya zisamere pachakudya kutsogolo ndi kumbuyo nkhungu, ngakhale thimble mu nkhungu kutsogolo kapena pang'ono undercut mu nkhungu kumbuyo), ndi zambiri kupanga nyumba zina pa khoma lamkati.
Ziribe kanthu kuti ndi zipolopolo kapena ziwalo zamkati, makulidwe a khoma ndi ofunikira ngati malo olandirira a pini ya ejector ya nkhungu, zomwe zimathandiza kuti ziwalozo zitulutsidwe bwino.
Mfundo za kapangidwe ka khoma makulidwe:
Popanga zigawo za pulasitiki, makulidwe a khoma ndilofunika kwambiri, zomwe ndizofunikira monga maziko a nyumba. Zomangamanga zina ziyenera kumangidwa pamenepo. Pakadali pano, zimakhudzanso makina, mawonekedwe, mawonekedwe, mtengo wa zida zapulasitiki. Choncho, makulidwe a khoma ayenera kutengera zinthu zomwe zili pamwambazi kuti zipangidwe.
Inanenanso kuti makulidwe a khoma amayenera kukhala mtengo wake. Ngati pali mtengo, zikutanthauza makulidwe a khoma. Ngati pali mfundo zambiri, zimatanthauza makulidwe a khoma. Kusiyana pakati pa ngakhale kapena kusagwirizana kudzayambitsidwa pambuyo pake. Tsopano, tikambirana za Mfundo yopangira makulidwe a khoma iyenera kutsatiridwa.
1. Kutengera mfundo zamakina katundu:
Inanena kuti ngakhale ndi zipolopolo kapena ziwalo zamkati, zonse zimafunikira mphamvu inayake. Kupatula pazinthu zina, mphamvu yotsutsa yotulutsa imafunika poganizira mapangidwe a zigawo. Ndikosavuta kupunduka ngati mbaliyo ndi yopyapyala kwambiri. Nthawi zambiri, makulidwe a khomawo akamakulirakulira, mbali zake zimakhala zolimba (makoma amawonjezeka ndi 10%, mphamvuyo imakwera pafupifupi 33%). Ngati makulidwe a khoma akupitilira muyeso wina, kuwonjezera pa makulidwe a khoma kumatsitsa mphamvu ya magawo chifukwa cha kuchepa ndi porosity. Kuwonjezeka kwa khoma makulidwe adzachepetsa mphamvu ya mbali ndi kuonjezera kulemera, chimafikira jekeseni akamaumba bwalo, mtengo, etc. mwachionekere, kuwonjezera mphamvu ya mbali mwa kungowonjezera khoma makulidwe si mulingo woyenera kwambiri pulogalamu. Ndi bwino kugwiritsa ntchito mawonekedwe a geometric kuti muwonjezere kuuma, monga nthiti, ma curve, malo okhala ndi malata, zouma, ndi zina.
Sizoletsedwa kuti chifukwa cha kuchepa kwa malo ndi zinthu zina, mphamvu za mbali zina zimazindikiridwa makamaka ndi makulidwe a khoma. Choncho, tikulimbikitsidwa kudziwa makulidwe oyenera a khoma potengera kuyerekezera kwa makina ngati mphamvu ndizofunikira. Zoonadi, mtengo wa makulidwe a khoma uyeneranso kutsatiridwa ndi mfundo zotsatirazi.
2. Kutengera mfundo ya formability:
Makulidwe enieni a khoma ndi makulidwe a nkhungu pakati pa zisankho zakutsogolo ndi zakumbuyo. Pamene utomoni wosungunuka udzaza ndi nkhungu ndikukhazikika, makulidwe a khoma amapezedwa.
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1) Kodi utomoni wosungunuka umayenda bwanji panthawi yobaya ndi kudzaza?
Kutuluka kwa pulasitiki mkati mwa mtsempha kumatha kuonedwa ngati kutuluka kwa laminar. Malinga ndi chiphunzitso cha fluid mechanics, madzimadzi a laminar amatha kuonedwa ngati zigawo zamadzimadzi pafupi ndi zinzake zomwe zimatsetsereka pochita kumeta ubweya.
![](https://www.djmolding.com/wp-content/uploads/2023/03/33.jpg)
Pakuumba jekeseni, utomoni wosungunula umalumikizana ndi khoma la othamanga (khoma la nkhungu), kupangitsa kuti zigawo za mitsinje zigwirizane ndi khoma la othamanga (kapena khoma la nkhungu) litakhazikika poyamba. Liwiro ndi zero, ndipo pali kukana kukangana komwe kumapangidwa ndi madzi ake oyandikana nawo. Pitirizani motere, liwiro lapakati pa mtsinje ndilokwera kwambiri. Mawonekedwe othamanga omwe kuthamanga kwa laminar kumachepera pafupi ndi khoma lothamanga (kapena khoma la nkhungu) kumbali zonse ziwiri.
Chigawo chapakati ndi chamadzimadzi, ndipo khungu la khungu ndi lolimba. Pamene nthawi yozizira ikupita, gawo la temberero lidzawonjezeka. Gawo la mtanda la madzimadzi wosanjikiza lidzakhala laling'ono pang'onopang'ono. Kudzaza kolimba, mphamvu ya jekeseni imakulirakulira. Zowonadi, zimakhala zovuta kukankhira kusungunuka mu nkhungu kuti mukwaniritse jekeseni.
Choncho, kukula kwa makulidwe a khoma kumakhudza kwambiri kuyenda ndi kudzazidwa kwa jekeseni wopangidwa ndi jekeseni panthawi yopangira jekeseni, ndipo mtengo wake sungakhale wochepa kwambiri.
2) Kukhuthala kwa pulasitiki kusungunuka kumakhalanso ndi chikoka chachikulu pa fluidity
Pamene kusungunula kuli pansi pa zochitika zakunja, ndipo pali kusuntha kwachibale pakati pa zigawozo, padzakhala mphamvu yowonongeka yamkati yomwe imapangidwira kuti isokoneze kayendedwe kachibale pakati pa zigawo zamadzimadzi. Mphamvu ya kukangana mkati mwamadzimadzi imatchedwa viscosity. Kuwunika mphamvu ya mamasukidwe akayendedwe ndi kukhuthala kwamphamvu (kapena mamasukidwe amphamvu). Mwachiwerengero chiŵerengero cha kumeta ubweya wa ubweya ku chiwerengero cha kumeta ubweya wa kusungunuka.
The mamasukidwe akayendedwe amasungunula zimasonyeza makhalidwe mosavuta ndi pulasitiki kusungunuka umayenda. Ndilo muyeso wa kusungunuka kwa madzi osungunuka. Kuchuluka kwa mamasukidwe akayendedwe, kukula kwamadzimadzi kukana, kumakhala kovuta kwambiri kuyenda. Zomwe zimakhudzidwa ndi kusungunuka kwa viscosity zimakhudzidwa osati zimangogwirizana ndi mapangidwe a maselo, komanso zimagwirizana ndi kutentha, kupanikizika, kumeta ubweya, zowonjezera, ndi zina (pambuyo posankha mitundu ya zipangizo zapulasitiki, kutentha, kupanikizika, kumeta ubweya, zowonjezera). ndi zinthu zina panthawi yopangira jakisoni zitha kusinthidwa kuti zisinthe kuchuluka kwa pulasitiki munjira yopangira jakisoni. M'tsogolomu, tidzalemba nkhani yokhudza kuchuluka kwa ndalama kutengera momwe zinthu ziliri.)
Pomwe, mukugwiritsa ntchito kwenikweni, Sungunulani Index ikuwonetsa kusungunuka kwa zinthu zapulasitiki zomwe zikugwiritsidwa ntchito. The apamwamba mtengo, bwino fluidity wa zinthu. M'malo mwake, fluidity ya zinthu adzakhala oipa.
Choncho, pulasitiki yokhala ndi madzi abwino ndi yosavuta kudzaza nkhungu, makamaka pazitsulo zopangira jekeseni ndi zovuta.
The fluidity ya mapulasitiki omwe amagwiritsidwa ntchito kwambiri amatha kugawidwa m'magulu atatu malinga ndi zomwe nkhungu zimafunikira:
①Mapiritsi abwino: PA, PE, PS, PP, CA, poly(4) methyl pentylene;
②Medium fluidity: polystyrene mndandanda resins (monga ABS, AS), PMMA, POM, PPO;
③Kusayenda bwino kwamadzi: PC, PVC yolimba, PPO, PSF, PASF, fluoroplastics.
Monga tikuonera mkuyu pamwamba, zinthu ndi fluidity osauka kwambiri, zofunika kwa osachepera khoma makulidwe adzakhala apamwamba. Izi zayambitsidwa mu chiphunzitso cha laminar flow.
Mtengo wovomerezeka wa makulidwe a khoma pamwambapa ndi nambala yokhazikika. Muzochita zenizeni, kukula kwa zigawozo kumaphatikizapo zazing'ono, zapakatikati ndi zazikulu, chithunzi chomwe chili pamwambachi sichikulongosola mndandanda wazinthu.
3) Titha kuwerengera ndi kuchuluka kwa kutalika kwa kuyenda
Kutalika kwa pulasitiki kumatanthawuza kuchuluka kwa kutalika (L) ndi makulidwe a khoma (T) la pulasitiki yosungunuka. Izi zikutanthawuza kuti makulidwe a khoma lopatsidwa, kumtunda kwa chiŵerengero cha kutalika kwa kutuluka, pulasitiki imasungunuka. Kapena pamene kutalika kwa pulasitiki kusungunula kutuluka ndi kotsimikizika, kukula kwa chiŵerengero cha otaya kutalika, kucheperachepera kwa khoma kungakhale. Choncho, kutalika kwa kutalika kwa pulasitiki kumakhudza mwachindunji chiwerengero cha kudyetsa ndi kugawa zinthu zapulasitiki. Komanso, zimakhudza khoma makulidwe a pulasitiki.
Kuti zikhale zolondola kwambiri, mtengo wamtengo wapatali wa makulidwe a khoma ukhoza kupezedwa kupyolera mu kuwerengera kwa kutalika kwa kutalika kwake. Zowonadi, mtengowu umagwirizana ndi kutentha kwa zinthu, kutentha kwa nkhungu, digiri yopukutira, ndi zina zambiri. Ndi mtengo wongoyerekeza, mikhalidwe yosiyana ndi yosiyana, ndizovuta kukhala zolondola, koma zitha kugwiritsidwa ntchito ngati mtengo.
Kuwerengera kutalika kwa mafunde:
L/T (chiwerengero) = L1/T1 (njira yayikulu) + L2/T2 (njira yogawanitsa) + L3/T3 (chinthu) Chiyerekezo cha kutalika kwa mayendedwe owerengeredwa chiyenera kukhala chocheperapo kuposa mtengo woperekedwa patebulo la katundu, apo ayi pangakhale kukhala Chochitika cha kusadzaza bwino.
![](https://www.djmolding.com/wp-content/uploads/2023/03/123321.jpg)
Mwachitsanzo
Chipolopolo cha rabara, zinthu za PC, makulidwe a khoma ndi 2, mtunda wodzaza ndi 200, wothamanga ndi 100, othamanga ndi 5.
Calculation: L/T(total)=100/5+200/2=120
Mtengo wofotokozera wa kutalika kwa kutalika kwa PC ndi 90, zomwe mwachiwonekere ndizokwera kuposa mtengo wa referent. Kuthamanga kwa jakisoni ndi kukakamiza kuyenera kuchulukidwa chifukwa ndikovuta kubaya, kapena kumafunikira makina opangira jakisoni apamwamba kwambiri. Ngati mutenga magawo awiri odyetsera kapena kusintha malo odyetserako, mtunda wodzaza wazinthu ukhoza kuchepetsedwa kukhala 100, womwe ndi L/T(total)=100/5+100/2=70. Chiyerekezo chautali tsopano ndi chocheperapo poyerekeza ndi mtengo wolozera ndipo ndichosavuta kupanga jekeseni. L/T(chiwerengero)=100/5+200/3=87 pamene makulidwe a khoma asinthidwa kukhala 3, zomwe zimalola jekeseni wamba.
3. Kutengera mawonekedwe:
Kuchita kwapadera kwa makulidwe a khoma kumakhudza mawonekedwe a magawo ndi awa:
1) Makulidwe a khoma losafanana: kutsika kwapamtunda (kuphatikiza zolakwika zamawonekedwe monga shrinkage, maenje, zipsera zokhuthala ndi zoonda), kupindika kwa warping, ndi zina zambiri.
2) Kuchuluka kwa khoma: zolakwika monga kuchepa kwa pamwamba ndi mabowo amkati.
3) Makulidwe a khoma ndi ochepa kwambiri: zolakwika monga kusowa kwa guluu, kusindikiza kwa thimble, warpage ndi kupunduka.
kuchepa kapena porosity
kufinya kapena porosity kawirikawiri kumachitika pa makulidwe a khoma. Limagwirira: molingana ndi mfundo yolimba ya zinthu, porosity yamkati ndi kuchepa kwamadzi panthawi yopangira jekeseni ndi chifukwa cha kukhazikika kosalekeza panthawi yozizira. Pamene shrinkage yakhazikika pamalo oundana kumbuyo, koma osapangidwa nthawi yomweyo, kuchepa ndi porosity kumakhala kosavuta kuchitika mkati.
![](https://www.djmolding.com/wp-content/uploads/2023/03/a123.jpg)
Mfundo zopangira makulidwe a khoma pamwambapa zimayambira pazinthu zinayi, zomwe ndi makina, mawonekedwe, mawonekedwe, mtengo. Ngati ntchito chiganizo chimodzi kufotokoza kamangidwe ka khoma makulidwe, ndiye kufunika kwa khoma makulidwe a jekeseni kuumbidwa mbali ayenera kukhala ang'onoang'ono ndi yunifolomu mmene ndingathere pansi mkhalidwe wokhutiritsa mawotchi katundu ndi processing ntchito. Apo ayi, iyenera kusinthidwa mofanana.
DJmolding imapereka ntchito zopangira zida zapulasitiki ndi kupanga kwapadziko lonse lapansi, ngati mukufuna kuyambitsa polojekiti yanu, chonde titumizireni pompano.