NaAndy anobva kuBaiyear fekitori
Yakadzorerwa November 2, 2022
Heino nzvimbo yenhau yeBaiyear's injection molding industry.Tevere, Baiyear ichakamura jekiseni rekuumba kuita zvinyorwa zvakati wandei kusuma ongororo yezvakagadzirwa zvejekiseni rekuumba maitiro, nekuti kune zvakawanda zvirimo.Chinotevera chinyorwa chechina.
(8).PP (polypropylene)
1. Kuita kwePP
PP ndeye crystalline yakakwirira polymer.Pakati pemapurasitiki anowanzo shandiswa, PP ndiyo yakareruka, ine density ye 0.91g/cm3 chete (idiki pane mvura).Pakati pemapurasitiki ane chinangwa, PP ine yakanyanya kupisa kupisa, kupisa kwayo kwekukanganisa kupisa i80-100 ℃, uye inogona kubikwa mumvura iri kufashaira.PP ine yakanaka kushushikana yekupwanya kuramba uye yakakwirira flexural kuneta hupenyu, inowanzozivikanwa se "kupeta glue".
Kuita kwakazara kwePP kuri nani pane kuya kwePE zvinhu.Zvigadzirwa zvePP zvine huremu huremu, kusimba kwakanaka uye kwakanaka kwemakemikari kuramba.Kukanganisa kwePP: kuderera kwechimiro, kusakwana kusimba, kushomeka kwemamiriro ekunze, nyore kugadzira "kukuvadzwa kwemhangura", ine chiitiko chemashure-shrinkage, uye mushure mekudhirowa, zviri nyore kuchembera, kuve brittle, uye nyore kukanganisa.PP yanga iri iyo huru yezvigadzirwa zvekugadzira fiber nekuda kwekugona kwayo kwemavara, abrasion uye makemikari kuramba zvivakwa, uye mamiriro ehupfumi akanaka.
PP ndeye semi-crystalline zvinhu.Iyo yakaoma uye ine yakakwirira yekunyungudika pane PE.Sezvo homopolymer PP iine brittle patembiricha iri pamusoro pe 0 ° C, zvinhu zvakawanda zvekutengesa zvePP zvinongori macopolymers ane 1 kusvika 4% ethylene yakawedzerwa kana pincer copolymers ane ethylene yemukati yemukati.Iyo copolymer-mhando yePP zvinhu ine yakadzika yekupisa kupisa tembiricha (100 ° C), yakaderera pachena, yakaderera gloss, yakaderera kuomarara, asi ine simba rakasimba rekuita.Simba rePP rinowedzera nekuwedzera ethylene yemukati.
Iyo Vicat inopfavisa tembiricha yePP ndeye 150 ° C.Nekuda kwehupamhi hwekristaro, chinyorwa ichi chine kunaka kuomarara kwepamusoro uye scratch resistance properties.
PP haina matambudziko ekupwanya kwezvakatipoteredza.Kazhinji, PP inogadziridzwa nekuwedzera girazi fibers, metal additives kana thermoplastic rabha.Kuyerera kweMFR yePP inotangira kubva ku1 kusvika ku40. PP zvinhu zvine MFR yakaderera zvine zviri nani kukanganisa kupikisa asi yakaderera ductility.Pamusoro pezvinhu zvakafanana zveMFR, simba remhando yecopolymer yakakwirira kudarika yemhando yehomopolymer.
Nekuda kwekristaro, iyo shrinkage rate yePP yakanyanya kukwirira, kazhinji 1.8 ~ 2.5%.Uye iyo inotungamira yakafanana ye shrinkage iri nani kupfuura iyo yezvinhu zvakaita seHDPE.Kuwedzera 30% yegirazi yekuwedzera inogona kuderedza shrinkage kusvika 0.7%.
Ose ari maviri homopolymer uye copolymer PP zvinhu zvine yakanakisa mwando absorption kuramba, asidhi uye alkali corrosion resistance, uye solubility kuramba.Zvisinei, haigoni kupikisa kunhuhwirira kwehydrocarbon (yakadai sebenzene) zvinonyungudutsa, chlorinated hydrocarbon (carbon tetrachloride) solvents, nezvimwewo. PP hainawo kupikisa oxidation pakupisa kwakanyanya sePE.
2. Maitiro maitiro ePP
PP ine mvura yakanaka pakunyunguduka tembiricha uye kuita kwakanaka kwekuumba.PP ine maitiro maviri mukugadzirisa:
Imwe: Iyo viscosity yePP inonyunguduka inoderera zvakanyanya nekuwedzera kweshear rate (haina kukanganiswa nekupisa);
Chechipiri: dhigirii rema molecular orientation yakakwirira uye shrinkage rate yakakura.Iyo tembiricha yekugadzirisa yePP ndeye 220 ~ 275 ℃.Zviri nani kuti usapfuure 275 ℃.Iine kugadzikana kwakanaka kwekupisa (kuora tembiricha i310 ℃), asi pakupisa kwakanyanya (270-300 ℃), inogara mudhiramu kwenguva yakareba.Pane mukana wekuderedzwa.Sezvo viscosity yePP inodzikira zvakanyanya nekuwedzera kwekushear kumhanya, kuwedzera iyo jekiseni kumanikidza uye jekiseni kumhanya kunovandudza fluidity uye kunatsiridza shrinkage deformation uye kuora mwoyo.Mold tembiricha (40 ~ 80 ℃), 50 ℃ inokurudzirwa.
Iyo dhigirii yekristallisation inonyanya kutariswa nekupisa kwe mold, iyo inofanirwa kudzorwa mukati meiyo 30-50 ° C.Iyo PP inonyungudika inogona kupfuura nepaburi rakatetepa kwazvo uye ichiita seyakadhindwa.Munguva yekunyunguduka kwePP, inoda kutora huwandu hukuru hwekupisa kupisa (yakakura chaiyo kupisa), uye chigadzirwa chinopisa mushure mekudzingwa kubva mukuumbwa.
PP zvinhu hazvidi kuomeswa panguva yekugadzirisa, uye shrinkage uye crystallinity yePP yakaderera pane yePE.Jekiseni kumhanya Kazhinji high speed jekiseni rinogona kushandiswa kuderedza mukati mukati.Kana pane kukanganisa pamusoro pechigadzirwa, ipapo jekiseni rezasi rinokurumidza kutonhora kwepamusoro rinofanira kushandiswa.Jekiseni pressure: kusvika 1800bar.
Vanomhanya nemasuwo: Kune vanotonhora vanomhanya, akajairwa mumhanyi madhayamita anotangira kubva 4 kusvika 7mm.Inokurudzirwa kushandisa sprues uye vanomhanya vane miviri yakatenderera.Mhando dzose dzemagedhi dzinogona kushandiswa.Yakajairika gedhi madhayamita anotangira pa1 kusvika 1.5mm, asi masuwo madiki se 0.7mm anogona zvakare kushandiswa.Kumagedhi emupendero, kudzika kwegedhi shoma kunofanira kuva hafu yemadziro emadziro;iyo yakaderera gedhi hupamhi hunofanirwa kunge hwakapetwa kaviri kukora kwemadziro, uye PP zvinhu zvinogona kushandisa zvizere inopisa mumhanyi system.
PP yanga iri iyo huru yezvigadzirwa zvekugadzira fiber nekuda kwekugona kwayo kwemavara, abrasion uye makemikari kuramba zvivakwa, uye mamiriro ehupfumi akanaka.
3. Yakajairika application range:
Indasitiri yemotokari (kunyanya kushandisa PP ine simbi yekuwedzera: mafenda, pombi dzekufemesa, mafeni, nezvimwewo), midziyo (yekugezesa magonhi edhishi, mapombi ekufemesa emhepo, mafuremu emuchina wekugezesa uye mavhavha, mabheji emasuo efiriji, nezvimwewo), zuva nezuva zvinhu zvevatengi (lawn). uye midziyo yemubindu yakaita sema lawnmower nemasprinkler, nezvimwewo).
Jekiseni molding ndiyo yechipiri pakukura musika wePP homopolymers, kusanganisira midziyo, kuvharwa, kunyorera mota, zvinhu zvemumba, matoyi uye zvimwe zvakawanda zvevatengi uye maindasitiri ekupedzisira mashandisiro.
(9).PA (nylon)
1. Kuita kwePA
PA iri zvakare crystalline plastiki (nylon igomarara rekona rinopenya kana mukaka chena crystalline resin).Sepurasitiki yeinjiniya, huremu hwenaironi hunowanzo 15,000-30,000, uye kune marudzi mazhinji.Inowanzo shandiswa naironi 6, naironi 66, uye naironi 1010 yekuumba jekiseni, Nylon 610, nezvimwe.
Nylon ine kuoma, kupfeka kuramba uye kuzvigadzika, uye zvakanakira zvakanyanya kusimba kwemagetsi emagetsi, kusimba kwakanaka, kuramba kuneta, nzvimbo yakatsetseka, yakanyanya kupfavisa nzvimbo, kupisa kwekupisa, kuderera kwekukwenya, kupfeka kuramba, kuzvizora, kubatwa nekuvhunduka. Uye kudzikiswa kweruzha, kupikisa mafuta, kusasimba kweasidhi, kupikisa alkali uye general solvent resistance, yakanaka magetsi ekudzivirira, kuzvidzima-kudzima, kusiri muchetura, kunhuhwirira, kunaka kwemamiriro ekunze.
Izvo zvisingabatsiri ndezvokuti kunyura kwemvura kwakakura, uye chivako chekudhaya chakashata, icho chinokanganisa kugadzikana kwedimensional uye magetsi emagetsi.Fiber reinforcement inogona kuderedza chiyero chekunyura kwemvura uye kuita kuti ishande pasi pekushisa kwepamusoro uye hunyoro hwepamusoro.Nylon ine hukama hwakanaka kwazvo negirazi fiber (inogona kushandiswa kwenguva yakareba pa 100 ° C), kusagadzikana kwekuora, kureruka uye kuumba nyore.Izvo zvinonyanya kukanganisa zvePA ndezvi: nyore kutora mvura, yakasimba tekinoroji zvinodiwa zvekuumbwa kwejekiseni, uye kushomeka kwemadimensional kugadzikana.Nekuda kwekupisa kwayo kukuru, chigadzirwa chinopisa.
PA66 ndiyo yepamusoro-soro yemagetsi simba uye inonyanya kushandiswa akasiyana muPA akateedzana.Kubwinya kwaro kwakakwirira, saka kuoma kwayo, kuoma uye kupikisa kupisa kwakakwirira.PA1010 yakatanga kusikwa munyika yangu muna 1958, ine translucent, diki chaiyo giravhiti, yakakwirira elasticity uye kuchinjika, kuderera kwemvura kunyura kupfuura PA66, uye yakavimbika dimensional kugadzikana.
Pakati pemanylon, naironi 66 ine yakanyanya kuoma uye kuomarara, asi yakanyanya kuomarara.Manaironi akasiyana-siyana anorongwa nekuoma: PA66＜PA66/6＜PA6＜PA610＜PA11＜PA12
Kupisa kwenylon ndeye ULS44-2, iyo oksijeni index i24-28, tembiricha yekuora yenylon i> 299 ℃, uye kupisa kwega kuchaitika pa449 ~ 499 ℃.Nylon ine yakanaka melt fluidity, saka ukobvu hwemadziro echigadzirwa hunogona kunge hudiki se1mm.
2. Maitiro maitiro ePA
2.1.PA iri nyore kutora unyoro, saka inofanirwa kuomeswa zvizere isati yagadziriswa, uye hunyoro hunofanirwa kudzorwa pazasi 0.3%.Zvinhu zvakasvibirira zvakaomeswa zvakanaka uye gloss yechigadzirwa yakakwirira, kana zvisina kudaro ichava yakaoma, uye PA haizopfavi zvishoma nezvishoma nekuwedzera kwekupisa kwekupisa, asi inozonyorovesa munzvimbo yakamanikana tembiricha iri pedyo nekunyungudika.Kuyerera kunoitika (yakasiyana nePS, PE, PP, nezvimwewo).
Iyo viscosity yePA yakadzikira zvakanyanya kupfuura mamwe thermoplastics, uye tembiricha yekunyunguduka kwayo idiki (chete ingangoita 5 ℃).PA ine mvura yakanaka, iri nyore kuzadza uye kuumba, uye iri nyore kubvisa.Iyo muromo inotarisana ne "salivation", uye glue inoda kuva yakakura.
PA ine yakakwira kunyungudika uye yakakwira chando nzvimbo.Iyo yakanyungudutswa mu mold ichasimba chero nguva nekuti tembiricha inodonha pazasi pekunyungudika, izvo zvinotadzisa kupedzwa kwekuzadza kuumbwa.Naizvozvo, jekiseni rinomhanya-mhanya rinofanira kushandiswa (kunyanya kune dzakatetepa-madziro kana kureba-kuyerera zvikamu).Nylon molds dzinofanirwa kunge dziine akaringana ekupedza.
Munzvimbo yakanyungudutswa, PA haina kugadzikana kwemafuta uye iri nyore kudzikisira.Kupisa kwebhodhoro hakufaniri kudarika 300 ° C, uye nguva yekupisa yezvinhu zvakanyungudutswa mubhodhoro haifaniri kudarika maminitsi makumi matatu.PA ine zvakakwirira zvinodikanwa pane tembiricha yekuumbwa, uye iyo crystallinity inogona kudzorwa netembiricha yekuumbwa kuti iwane kuita kunodiwa.
Iyo tembiricha ye mold yezvinhu zvePA ingangoita 50-90 ° C, iyo tembiricha yePA1010 iri nani 220-240 ° C, uye tembiricha yePA66 ndeye 270-290 ° C.PA zvigadzirwa dzimwe nguva zvinoda "annealing kurapwa" kana "humidity conditioning kurapwa" zvinoenderana nemhando zvinodiwa.
2.2.PA12 Usati wagadzira polyamide 12 kana naironi 12, hunyoro hunofanira kuchengetwa pasi pe0.1%.Kana zvinhu zvakachengetwa zvakafumurwa kumhepo, zvinokurudzirwa kuti zviome mumhepo inopisa pa85C kwe4 ~ 5 maawa.Kana zvinhu zvakachengetwa mumudziyo usina mhepo, zvinogona kushandiswa pakarepo mushure memaawa matatu ekuenzana kwekushisa.Tembiricha yekunyunguduka ndeye 240 ~ 300C;pazvinhu zvakajairika, hazvifanirwe kudarika 310C, uye kune zvinhu zvine murazvo wemoto, hazvifanirwe kudarika 270C.
Mold tembiricha: 30 ~ 40C yezvinhu zvisina kusimbiswa, 80 ~ 90C kune dzakatetepa-madziro kana makuru enzvimbo zvikamu, uye 90 ~ 100C yezvinhu zvakasimbiswa.Kuwedzera tembiricha kuchawedzera crystallinity yezvinhu.Kunyatso kudzora tembiricha yekuumbwa kwakakosha kune PA12.Jekiseni dzvinyiriro: inosvika 1000bar (yakaderera kubata kumanikidza uye yakanyanya kunyungudika tembiricha inokurudzirwa).Injection speed: high speed (zviri nani kune zvinhu zvine magirazi ekuwedzera).
Mumhanyi uye gedhi: Zvemidziyo isina zvekuwedzera, iyo dhayamita yemumhanyi inofanira kunge yakatenderedza 30mm nekuda kweiyo yakaderera viscosity yezvinhu.Kune zvakasimbiswa zvinhu, yakakura mumhanyi dhayamita ye5 ~ 8mm inodiwa.Chimiro chemumhanyi chinofanira kunge chiri chese denderedzwa.Iyo jekiseni port inofanira kuva pfupi sezvinobvira.
Mhando dzakasiyana-siyana dzemagedhi dzinogona kushandiswa.Usashandise magedhi madiki ezvikamu zvakakura zvepurasitiki, izvi ndezvekudzivirira kudzvinyirira kwakanyanya kana shrinkage yakawandisa pane zvikamu zvepurasitiki.Kuwanda kwegedhi kunonyanya kuenzana nehupamhi hwechikamu chepurasitiki.Kana ukashandisa gedhi rakanyura mumvura, dhayamita shoma ye0.8mm inokurudzirwa.Molds dzinopisa dzinomhanya dzinoshanda, asi dzinoda kudzora tembiricha chaiyo kudzivirira zvinhu kubva pakudonha kana kuoma pamuromo.Kana mumhanyi anopisa akashandiswa, saizi yegedhi inofanira kunge iri diki pane yeanotonhora.
2.3.PA6 Polyamide 6 kana Nylon 6: Sezvo PA6 inogona kutora unyoro nyore, kunyanya kunofanira kubhadharwa pakuomeswa kusati kwagadziriswa.Kana zvinhu zvacho zvikaiswa mumapaketi asingapindi mvura, mudziyo wacho unofanirwa kugara wakavharwa zvakasimba.Kana hunyoro hwakakura kupfuura 0.2%, zvinokurudzirwa kuomesa mumhepo inopisa pamusoro pe80C kwemaawa gumi nematanhatu.Kana zvinhu zvacho zvave zvakafumurwa kumhepo kweanopfuura maawa masere, vacuum drying pa105C kweanopfuura maawa masere zvinokurudzirwa.
Kunyunguduka tembiricha: 230 ~ 280C, 250 ~ 280C nokuda yakasimbiswa mhando.Mold tembiricha: 80 ~ 90C.Mold tembiricha inokanganisa zvakanyanya crystallinity, iyo inozokanganisa ma mechanika ezvikamu zvepurasitiki.Crystallinity yakakosha kune zvikamu zvezvimiro, saka inokurudzirwa tembiricha yekuumbwa i80 ~ 90C.
Kupisa kwepamusoro mold kunokurudzirwawo kune dzakatetepa-madziro, refu-maitiro epurasitiki zvikamu.Kuwedzera tembiricha yekuumbwa kunogona kuwedzera kusimba uye kuoma kwechikamu chepurasitiki, asi kunoderedza kuoma.Kana ukobvu hwemadziro hwakakura kupfuura 3mm, zvinokurudzirwa kushandisa yakaderera tembiricha mold ye20 ~ 40C.Kusimbisa girazi, tembiricha yekuumbwa inofanira kunge yakakura kupfuura 80C.Jekiseni kudzvinyirirwa: kazhinji pakati 750 ~ 1250bar (zvichienderana zvinhu uye chigadzirwa dhizaini).
Injection speed: kumhanya (kuderera zvishoma kune zvakasimbiswa zvinhu).Vanomhanya nemasuwo: Nekuda kwenguva pfupi yekusimbisa yePA6, nzvimbo yegedhi yakakosha.Iyo dhayamita yegedhi haifaniri kunge iri pasi pe 0.5 * t (pano t ndiyo hupamhi hwechikamu chepurasitiki).Kana mumhanyi anopisa akashandiswa, saizi yegedhi inofanira kunge iri diki pane inomhanya yakajairwa, sezvo mumhanyi anopisa anogona kubatsira kudzivirira kusimba kusati kwaitika kwezvinhu.Kana gedhi rakanyura rakashandiswa, dhayamita shoma yegedhi inofanira kuva 0.75mm.
2.4.PA66 Polyamide 66 kana Nylon 66 Kana iyo yakavharwa isati yagadziriswa, saka kuomeswa hakudiwi.Nekudaro, kana mudziyo wekuchengetera ukavhurwa, kuomesa mumhepo inopisa pa85C inokurudzirwa.Kana hunyoro hwakakura kupfuura 0.2%, kuomeswa kwevacuum pa105C kwemaawa gumi nemaviri kunodiwa.
Kunyunguduka tembiricha: 260 ~ 290C.Chigadzirwa chegirazi chekuwedzera ndeye 275 ~ 280C.Kunyunguduka tembiricha inofanira kudziviswa kupfuura 300C.Mold tembiricha: 80C inokurudzirwa.Mold tembiricha ichakanganisa crystallinity, uye crystallinity ichakanganisa maitiro echigadzirwa.
Kune dzakatetepa-madziro epurasitiki zvikamu, kana mold tembiricha yakaderera kupfuura 40C ikashandiswa, iyo crystallinity yezvikamu zvepurasitiki ichachinja nekufamba kwenguva.Kuti uchengetedze kugadzikana kwejometri yezvikamu zvepurasitiki, kurapwa kwe annealing kunodiwa.Jekiseni pressure: kazhinji 750 ~ 1250bar, zvichienderana nezvinhu uye chigadzirwa dhizaini.Injection speed: kumhanya (kuderera zvishoma kune zvakasimbiswa zvinhu).
Vanomhanya nemasuwo: Sezvo nguva yekusimbisa yePA66 ipfupi kwazvo, nzvimbo yegedhi yakakosha.Iyo dhayamita yegedhi haifaniri kunge iri pasi pe 0.5 * t (pano t ndiyo hupamhi hwechikamu chepurasitiki).Kana mumhanyi anopisa akashandiswa, saizi yegedhi inofanira kunge iri diki pane inomhanya yakajairwa, sezvo mumhanyi anopisa anogona kubatsira kudzivirira kusimba kusati kwaitika kwezvinhu.Kana gedhi rakanyura rakashandiswa, dhayamita shoma yegedhi inofanira kuva 0.75mm.
3. Yakajairika application range:
3.1.PA12 Polyamide 12 kana Nylon 12 Zvishandiso: Mamita emvura uye zvimwe zvekutengesa midziyo, tambo maoko, mechanika makamera, kutsvedza nzira uye mabhengi, nezvimwe.
3.2.PA6 Polyamide 6 kana Nylon 6 Kushandisa: Inoshandiswa zvakanyanya muzvikamu zvezvimiro nekuda kwesimba rayo rakanaka remagetsi uye kuoma.Nekuda kwekunaka kwayo kupfeka kuramba, inoshandiswawo kugadzira mabearings.
3.3.PA66 Polyamide 66 kana Nylon 66 Chikumbiro: Kuenzaniswa nePA6, PA66 inonyanya kushandiswa muindasitiri yemotokari, dzimba dzemidziyo uye zvimwe zvigadzirwa zvinoda kupikisa uye simba rakakura zvinodiwa.
Kuenderera mberi, kana uchida kuziva zvakawanda, ndapota inzwa wakasununguka kutibata nesu.Baiyear ifekitari yakakura yakazara yakazara inobatanidza kugadzira epurasitiki mold, jekiseni rekugadzira uye sheet simbi kugadzirisa.Kana kuti iwe unogona kuramba uchiteerera kune nzvimbo yenhau yewebhusaiti yedu yepamutemo: www.baidasy.com, isu ticharamba tichivandudza ruzivo rwenhau dzine chekuita nejekiseni molding processing industry.
Contact:Andy Yang
What's app : +86 13968705428
Email: Andy@baidasy.com
Nguva yekutumira: Nov-29-2022
