1. Chiitiko cheChirema**
Munguva yekuumbwa kwejekiseni, mamwe matunhu emold cavity anogona kusawana kumanikidzwa kwakakwana.Sezvo purasitiki yakanyungudutswa inotanga kutonhora, nzvimbo dzine madziro makuru makuru dzinodzikira zvishoma nezvishoma, zvichiita kuti tinyanye kunetseka.Kana kusimba kwepamusoro kwechigadzirwa chakaumbwa kusingakwani uye kukasawedzerwa nezvinhu zvakanyungudutswa zvakaringana, mavanga ekunyura anooneka.Chiitiko ichi chinonzi "sink marks".Izvi zvinowanzoitika kumatunhu uko ipurasitiki yakanyungudutswa inoungana mugomba uye pazvikamu zvakakora zvechigadzirwa, senge pakusimbisa mbabvu, makoramu anotsigira, uye mharadzano dzawo nepamusoro pechigadzirwa.
2. Zvinokonzera uye Mhinduro dzeSink Marks
Kutaridzika kwemavara ekunyura pazvikamu zvakaumbwa-jekiseni hazvingoshatise kukwezva kwerunako asiwo zvinokanganisa simba ravo remuchina.Chiitiko ichi chakabatana zvakanyanya nemidziyo yepurasitiki inoshandiswa, maitiro ekugadzira jekiseni, uye dhizaini yezvose chigadzirwa uye mold.
(i) Pamusoro pePlastiki Material
Mapurasitiki akasiyana ane shrinkage rates dzakasiyana.Mapurasitiki ane crystalline, akadai senaironi uye polypropylene, anonyanya kutapukirwa nekunyura mamaki.Mukuumba, mapurasitiki aya, kana apiswa, anochinja kuenda kune inoyerera ine mamorekuru akarongwa zvisina tsarukano.Pakuiswa jekiseni mugomba rinotonhora, mamorekuru aya anorongeka zvishoma nezvishoma kuti aumbe makristasi, zvichikonzera kudzikiswa kukuru kwevhoriyamu.Izvi zvinokonzeresa zvimiro zvidiki pane zvakatemwa, nokudaro zvichikonzera "kunyura mamaki."
(ii) Kubva pane Injection Molding Process Perspective
Panyaya yemajekiseni ekuumba maitiro, zvinokonzeresa kunyura mamaki zvinosanganisira kusakwana kwekubata kumanikidza, kunonoka jekiseni kumhanya, yakaderera mold kana tembiricha yezvinhu, uye nguva isina kukwana yekubata.Naizvozvo, kana uchiseta molding process parameters, zvakakosha kuti uve nechokwadi chekuumbwa kwakakodzera mamiriro uye kukwana kwakaringana kumanikidza kudzikamisa sink mamaki.Kazhinji, kurebesa nguva yekubata kunovimbisa kuti chigadzirwa chine nguva yakakwana yekutonhora uye yakanyungudutswa yekuwedzera zvinhu.
(iii) Yakabatana neChigadzirwa uye Mold Dhizaini
Chinonyanya kukonzera sink marks ndiko kusaenzana kwemadziro ukobvu wechigadzirwa chepurasitiki.Mienzaniso yechinyakare inosanganisira kuumbwa kwemasink mamaki akatenderedza mbabvu dzekusimbisa uye makoramu anotsigira.Zvakare, mold dhizaini zvinhu senge mumhanyi sisitimu dhizaini, saizi yegedhi, uye kutonhora kunoshanda zvakanyanya kukanganisa chigadzirwa.Nekuda kwekudzikira kwekupisa kwemapurasitiki, matunhu ari kure kubva kumadziro eforoma anotonhorera zvishoma.Nekudaro, panofanirwa kunge paine zvinhu zvakanyungudutswa zvakakwana kuzadza matunhu aya, zvinoda jekiseni remushini wekuumba screw kuti uchengetedze kudzvanywa panguva yejekiseni kana kubata, kudzivirira kuyerera.Sezvineiwo, kana vamhanyi ve mold vakatetepa, vakareba, kana gedhi riri diki uye richitonhora nekukurumidza, semi-yakasimba mapurasitiki anogona kuvharira mumhanyi kana gedhi, zvichikonzera kudonha kwekumanikidza mugomba, zvichizoguma nekunyura kwechigadzirwa. marks.
Muchidimbu, zvikonzero zvekunyura mamaki zvinosanganisira kusakwana kwe mold kuzadzwa, kusakwana kwepurasitiki yakanyungudutswa, kusakwana kwejekiseni kudzvanywa, kusakwana kubata, kukurumidza kukurumidza kuenda kune kudzvanywa, kupfupika kwenguva jekiseni, kunonoka kana kukurumidza jekiseni kumhanya (kunotungamira kumhepo yakavharirwa), kushomeka kana kusaenzana. magedhi (mune-multi-cavity molds), zvivhariso zvemhino kana kusashanda zvakanaka kwemabhandi ekupisa, tembiricha yekunyunguduka isina kufanira, tembiricha yakadzikama (inotungamira mukushanduka mbabvu kana makoramu), kusapinda zvakanaka munzvimbo dzesink mark, madziro akakora pambabvu kana makoramu, asina kupfeka. -kudzosera mavharuvhu anotungamira kune yakawandisa backflow, isina kufanira gedhi chinzvimbo kana yakanyanyisa kureba kuyerera nzira, uye yakanyanyisa kutetepa kana yakareba kumhanya.
Kuti uderedze masingi mamaki, mishonga inotevera inogona kugamuchirwa: kuwedzera kunyungudika jekiseni vhoriyamu, kuwedzera kunyunguduka metering sitiroko, kuwedzera jekiseni kudzvanywa, kukwidziridza kudzvanywa kana kurebesa nguva yayo, kuwedzera jekiseni nguva (kushandisa pre-ejection basa), kugadzirisa jekiseni. kumhanya, kuwedzera saizi yegedhi kana kuve nechokwadi chekuyerera kwakadzikama mu-multi-cavity molds, kuchenesa muromo wechero zvinhu zvekunze kana kutsiva kusashanda zvakanaka mabhendi ekudziya, kugadzirisa muromo nekuichengetedza nemazvo kana kudzikisa backpressure, optimize tembiricha yekunyunguduka, kugadzirisa tembiricha yekudziya, uchifunga nezve. yakawedzerwa nguva yekutonhodza, kuunza nzira dzekubuda nadzo munzvimbo dzakasimukira, kuve nechokwadi chekukora kwemadziro (uchishandisa jekiseni rinobatsira gasi kana zvichidikanwa), kutsiva mavharuvhu akasakara asina kudzoka, kuisa gedhi munzvimbo dzakakora kana kuwedzera huwandu hwemagedhi, uye kugadzirisa mumhanyi. zviyero uye kureba.
Nzvimbo: Ningbo Chenshen Plastic Indasitiri, Yuyao, Ningbo, Zhejiang Province, China
Date: 24/10/2023
Nguva yekutumira: Oct-30-2023