Sarudza Mutauro 
Mukugadzira nekugadzirisa compression-yakaumbwa rubber zvigadzirwa, rubber molds zvishandiso zvakakosha zvekudzora uye kuve nechokwadi chigadzirwa geometry, zviyero zvegungano , uye kutevedzera dimensional tolerances . The dhizaini uye kugadzirwa kwemhando ye molds inosarudza zvakananga kururama kwedimensional, kutaridzika kwepamusoro ,uye chiyero chekupedzisira chekufanirwa yezvigadzirwa zverabha, uye inoshanda sehwaro hwakakosha hwekuwana mashizha erubha ane goho guru.
Zvigadzirwa zveRubber zvinowanzogadzirwa ne kusanganisa raw rabha nezvinhu zvakasiyana-siyana zvinosanganisa , inoteverwa nekugadzirisa pasi kupisa kwakanyanya uye kudzvinyirira kwakanyanya mamiriro. Komboni yacho inobaiwa mu mold cavity , kwainoyerera uye inozadza mhango yakagadzirwa uye groove zvivakwa. Kuburikidza crosslinking reactions , komboni yacho inozoshandurwa kuita vulcanized rabha zvigadzirwa zvine kukosha kwekushandisa.
Iyi nzira inoshandiswa zvakanyanya mukati kugadzira rubber mold uye yakakwirira-chaiyo silicone rubber mold kugadzira.
1. Zvishandiso zveMould uye Mamiriro Ebasa seManyuko ekusvibiswa uye Kuora
Parizvino, vakawanda rubber molds zvinogadzirwa kubva P20 yepakati-kabhoni simbi kana 45 # simbi , izvo zviri zvemazuva ose kupisa-kushanda mold steels . Pasi penguva refu high-tembiricha vulcanization mamiriro , mold cavities inotarisana nemhando dzinotevera dzekukuvadza uye kusvibiswa:
Thermal Oxidation Kusvibiswa
Kana molds inoratidzwa kune tembiricha yakakwira, oxidation reactions inoitika pakati pevhu uye oxygen mumhepo, ichigadzira. oxidation kusvibiswa mavara pamusoro pegomba.
Non-polar rubbers : prone to kupfava kudzikira uye kunamatira kune mold cavity surface
Polar rubbers : kuita kuumba localized dzakaoma makwapa , zvinokanganisa demolding performance uye kutaridzika kwepamusoro
Deposition of Compounding Agents uye Low-Molecular Substances
Chokwadi kusanganisa zvinhu kana pasi-molecular components mumakomisheni erabha anogadzira zvigadzirwa zvitsva zvekuita panguva yevulcanization, izvo zvishoma nezvishoma dhipoziti pane mold cavity surface.
Corrosive Gasi uye Halogen Migumisiro
Mamwe marudzi erabha, akadai chloroprene rubber (CR), chlorosulfonated polyethylene rubber (CSM) ,uye fluororubber (FKM) , kusunungurwa zvinhu zvinoparadza zvakaita se HCl, H₂S ,uye metal chlorides panguva yevulcanization. Zvinhu izvi zvinokonzera zvakakosha kuora kwe mold cavities , ine kunyanya kuomarara kukanganisa silicone rubber mold processing uye precision mold sevhisi hupenyu.
Izvi zvinosvibisa uye corrosion phenomena kwete kungosvibisa iyo kutaridzika uye kuita kwemukati ye vulcanized rabha zvigadzirwa , asiwo kuderedza kugadzikana kwekugadzira , zvinogona kutungamirira ku kuvhiringidzwa kuenderera mberi kushanda , iyo inokanganisa zvakananga kugadzirwa kwehuwandu mushure kukurumidza rubber mold delivery.
2. Zvinhu Zvikuru Zvinokanganisa Kusvibiswa kweMold uye Corrosion (Kuongorora Weight)
Kubva pane ruzivo runoshanda uye uremu factor analysis , kusvibiswa kwe mold uye corrosion zvinonyanya kutungamirirwa ne Rabha compounding system , kusanganisira:
Vulcanization system additives (sarufa, accelerators, zinc oxide)
Accelerators ine yakaderera solubility uye yakakwirira migration tsika
Migratory antioxidants
Activators akadai stearic asidhi
Kuburitswa Kwekunze uye Mold-Release Systems
Polysiloxane-based agents
Paraffin-based agents (kusvibiswa kwakanyanya)
Fluorinated release agents
Mukuwedzera, zvinhu zvinotevera zvinonyanya kuwedzera kusvibiswa kwehutu:
Kusarudzwa kwe mold coating materials
Mold pamusoro kupera uye sandblasting kurapwa
Vulcanization tembiricha, nguva, uye inoenderera kugadzirwa kutenderera
Tembiricha uye humidity mamiriro panguva yekuchengetera komboni
In yakakwirira-chaiyo silicone rubber mold application , iyo yakasanganiswa mhedzisiro yezvinhu izvi inonyanya kukosha.
3. Three-Stage Evolution Mechanism yeMold Cavity Contamination
Danho 1: Kutama Kwekusvibiswa
Pasi pemamiriro ekunze ekupisa, vulcanization additives uye reaction by-Zvigadzirwa tama kubva mukati memukomboni werabha wakananga ku mold cavity surface.
Danho 2: Kunamatira uye Deposition
Izvi zvinhu zvinonamatira uye kuisa pane simbi mold pamusoro , zvishoma nezvishoma zvakaoma-kubvisa-oxidized layers kuburikidza thermal oxidation reactions.
Danho rechitatu: Kuchembera uye Kutamiswa
Nekuramba uchishandiswa kwenguva refu, zvinosvibisa zvinopinda kuchembera nekudzikisirwa:
Chikamu chinova yakanamatira zvakasimba kune mold cavity
Chimwe chikamu chinotamira kune pamusoro pezvigadzirwa zverabha zvakasvibiswa , kukonzera tsvina, pamusoro makatsemuka ,uye chitarisiko kukanganisa
Izvi hazvina kunaka zvakanyanya kune vanogadzira vanoteedzera mashizha erubha ane goho guru.
4. Kufurira kweMold Structure uye Surface Kurapa paKusvibiswa
In kugadzira rubber mold uye silicone rubber mold processing:
High-polish, chrome-plated, kana Zveseoy-coated molds → kusImbaka kusvibiswa
Sandblasted, matte, kana textured molds → kusvibiswa kwakanyanya
Kunyanya kukoshesa kunofanira kubhadharwa kune chokwadi chokuti sandblasting-induced surface roughness anogona kugadzira a “anchoring effect” panguva yevulcanization, zvichiita kuti mechanical interlocking pakati perabha uye mold pamusoro. Izvi zvinoguma kunamatira kwakanyanya, kuderedza dambudziko ,uye kusvibiswa kwechipiri.
Kugadzirisa nyaya iyi, zvinotevera pamusoro pekusimudzira mhinduro zvinokurudzirwa:
Chrome plating
Tungsten-chromium coatings
Vanadium-cobalt Zveseoy coatings
Aya matekinoroji akasimbiswa zvakanyanya mukati high-precision silicone rubber molds.
5. Comprehensive Strategies Kuderedza Mold Kusvibiswa
1️⃣ Kugonesa kweCompound Kugadzira
Sarudza kusanganisa zvinhu zvine kuenderana kwakanaka kwerabha, kutama kwakaderera ,uye low blooming tendency
Deredza zvinhu zvakaderera-molecular inokurumidza kutumbuka uye kuiswa
2️⃣ Optimization yeMold Structure Design
Iva nechokwadi yakatsetseka yerabha inoyerera migero
Deredza makona akafa uye nzvimbo dzekuchengetedza , kubvumira zvinosvibisa kuti zvibviswe panguva yekuyerera kwerabha kunyange kana kusvibiswa kukaitika
3️⃣ Kugonesa kweMold Surface Injiniya
Isa pakutanga electroplated kana Zveseoy-coated surfaces
Dzivisa zvisina basa rough sandblasting treatments
4️⃣ Kuchenesa uye Maintenance Mechanisms
Kazhinji mold-kuchenesa nzira dzinosanganisira:
Mechanical kuchenesa (kunyorova, kuoma, kukwenenzvera nemaoko)
Kemikari kuchenesa (acid kuchenesa / alkaline kuchenesa)
Ultrasonic kuchenesa
Parizvino, makemikari kuchenesa ndiyo nzira inonyanya kushandiswa, kunyange zvakadaro kuchengetedzwa kwezvakatipoteredza zvinodiwa uye kuchengetedzwa kwevashandisi inofanira kunyatsofungwa. Commercial mold-yekuchenesa zvinwiwa uye mold-yekuchenesa Rabha compounds inogonawo kushandiswa seyebetsero mhinduro.
Mhedziso
Mold cavity kusvibiswa mukati compression-yakaumbwa rubber zvigadzirwa ndizvo pasi rose, recurrent ,uye systematic mumasikirwo. Kupfuura chete systematic optimization ye:
Musanganiswa wekugadzira dhizaini
Unyanzvi hwekurapa hwepamusoro
vagadziri vanogona kuwana zvechokwadi:
Yakagadzika misa kugadzirwa kweyakanyanya-chaiyo silicone rubber molds
Yakasimba uye yakavimbika kugadzirwa kwekuita mushure mekukurumidza kuburitsa rubber mold
Mukugadzira nekugadzirisa compression-yakaumbwa rubber zvigadzirwa, rubber molds zvishandiso zvakakosha zvekudzora uye kuve nechokwadi chigadzirwa geometry, zviyero zvegungano , uye kutevedzera dimensional tolerances.
