Polypropylene (PP) ndeye thermoplastic "yekuwedzera polymer" yakagadzirwa kubva musanganiswa wepropylene monomers. Inoshandiswa mumhando dzakasiyana dzekushandisa kusanganisira kurongedza kwezvigadzirwa zvevatengi, zvikamu zvepurasitiki zvemaindasitiri akasiyana siyana kusanganisira indasitiri yemotokari, michina yakakosha senge hinges yekugara, uye machira.
1. Kurapa kwepurasitiki.
Pure PP inopenya yenzou chena uye inogona kudhayiwa nemavara akasiyana. Kune PP dhayi, chete colorbatch masterbatch inogona kushandiswa pane zvakajairikajekiseni kuumbamichina. Zvigadzirwa zvinoshandiswa kunze zvinowanzozadzwa neUV stabilizers uye kabhoni nhema. Chiyero chekushandiswa kwezvinhu zvakadzokororwa hazvifanirwe kudarika 15%, zvikasadaro zvinokonzeresa kudonha kwesimba uye kuora uye kushanduka.
2. Kusarudzwa kwejekiseni molding machine
Nekuti PP ine yakakwira crystallinity. Muchina wekugadzira jekiseni rekombuta une kudzvanywa kwejekiseni yepamusoro uye multi-stage control inodiwa. Iyo clamping simba rinowanzo temwa pa 3800t/m2, uye huwandu hwejekiseni i20% -85%.
3. Mold uye gedhi kugadzira
Iyo tembiricha yekuumbwa ndeye 50-90 ℃, uye tembiricha yakakwira mold inoshandiswa kune yakakwira saizi zvinodiwa. Iyo tembiricha yepakati inopfuura 5 ℃ yakaderera pane tembiricha yegomba, iyo mumhanyi dhayamita i4-7mm, kureba kwegedhi retsono i1-1.5mm, uye dhayamita inogona kuita diki se0.7mm. Kureba kwegedhi remupendero ipfupi sezvinobvira, inenge 0.7mm, kudzika ihafu yemadziro emadziro, uye hupamhi huri kaviri rusvingo rwemadziro, uye zvishoma nezvishoma huchawedzera nekureba kwekunyunguduka kuyerera mumhango. Iyo mold inofanira kuva nemhepo yakanaka. Gomba remhepo rakadzika 0.025mm-0.038mm uye gobvu 1.5mm. Kuti udzivise shrinkage marks, shandisa muromo wakakura uye wakatenderera uye mumhanyi wedenderedzwa, uye hupamhi hwembabvu hunofanira kuva hudiki. Ukobvu hwezvigadzirwa zvakagadzirwa nehomopolymer PP hazvigone kudarika 3mm, kana zvisina kudaro pachava nemabhuru.
4. Kunyunguduka kwekushisa
Nzvimbo yakanyunguduka yePP ndeye 160-175 ° C, uye tembiricha yekuparara i350 ° C, asi tembiricha yekumisikidza haigone kudarika 275 ° C panguva yekugadzira jekiseni. Kupisa kwenzvimbo yakanyunguduka kunoda 240°C.
5. Kumhanya kwejekiseni
Kuti uderedze kushushikana kwemukati uye deformation, high-speed jekiseni inofanira kusarudzwa, asi mamwe mamakisi ePP uye molds haana kukodzera. Kana iyo patterned surface ichiita ine chiedza uye mitsetse yakasviba yakaparadzirwa negedhi, jekiseni rakaderera-speed uye yakakwirira mold tembiricha inofanira kushandiswa.
6. Sungunusa adhesive back pressure
5bar melt adhesive back pressure inogona kushandiswa, uye iyo yekumashure kudzvanywa kwezvinhu zve toner inogona kugadziridzwa zvakakodzera.
7. Jekiseni uye kudzvinyirirwa kuchengetedza
Shandisa yakakwira jekiseni pressure (1500-1800bar) uye kubata kudzvanywa (inenge 80% yekumanikidza jekiseni). Chinja pakubata kudzvanya panenge pa95% yekurohwa kwakazara, uye shandisa nguva yakareba yekubata.
8. Mushure mekugadzirisa zvigadzirwa
Kuti udzivirire shrinkage uye deformation inokonzerwa neiyo post-crystallization, zvigadzirwa zvinowanzoda kunyorova.d mumvura inopisa.
Nguva yekutumira: Feb-25-2022
