ABS, wanda aka fi sani da acrylonitrile butadiene styrene, an samar da shi ne ta hanyar haɗa monomers guda uku na acrylonitrile-butadiene-styrene. Saboda bambancin rabon monomers guda uku, akwai halaye daban-daban da zafin narkewa, aikin motsi na ABS, idan aka haɗa shi da wasu robobi ko ƙari, yana iya faɗaɗa amfani da aikin ABS.
Ruwan ABS yana tsakanin PS da PC, kuma ruwansa yana da alaƙa da zafin allura da matsin lamba, kuma tasirin matsin lamba na allura yana da ɗan girma. Saboda haka, ana amfani da matsin lamba mafi girma wajen yin ƙira don rage ɗanko na narkewa da inganta aikin cika mold.
1. Sarrafa filastik
Yawan shan ruwa na ABS shine kusan 0.2%-0.8%. Ga ABS na yau da kullun, ya kamata a gasa shi a cikin tanda a 80-85°C na tsawon awanni 2-4 ko kuma a cikin hopper na busarwa a 80°C na tsawon awanni 1-2 kafin a sarrafa shi. Ga ABS mai ɗauke da kayan PC masu jure zafi, ya kamata a ƙara zafin busarwa yadda ya kamata zuwa 100°C, kuma ana iya ƙayyade takamaiman lokacin busarwa ta hanyar fitar da iska.
Adadin kayan da aka sake yin amfani da su ba zai iya wuce kashi 30% ba, kuma ABS mai girman electroplating ba zai iya amfani da kayan da aka sake yin amfani da su ba.
2. Zaɓin injin ƙera allura
Ana iya zaɓar injin gyaran allura na yau da kullun na Ramada (rabo daga tsawon sukurori zuwa diamita 20:1, rabon matsi ya fi 2, matsin lamba fiye da sandar 1500). Idan an yi amfani da babban rukunin launi ko kuma bayyanar samfurin ya yi yawa, za a iya zaɓar sukurori mai ƙaramin diamita. Ana ƙayyade ƙarfin matsewa bisa ga 4700-6200t/m2, wanda ya dogara da matakin filastik da buƙatun samfurin.
3. Tsarin Mould da ƙofa
Za a iya saita zafin mold a 60-65°C. Diamita na gudu shine 6-8mm. Faɗin ƙofar kusan 3mm ne, kauri iri ɗaya ne da na samfurin, kuma tsawon ƙofar ya kamata ya zama ƙasa da 1mm. Ramin iska yana da faɗin 4-6mm da kauri 0.025-0.05mm.
4. Zafin narkewa
Ana iya tantance shi daidai ta hanyar amfani da hanyar allurar iska. Maki daban-daban suna da yanayin narkewa daban-daban, saitunan da aka ba da shawarar sune kamar haka:
Matsayin tasiri: 220°C-260°C, zai fi kyau 250°C
Matsayin Electroplating: 250°C-275°C, zai fi dacewa 270°C
Matsayin juriya ga zafi: 240°C-280°C, zai fi dacewa 265°C-270°C
Matsayin hana harshen wuta: 200°C-240°C, zai fi dacewa 220°C-230°C
Ma'aunin haske: 230°C-260°C, zai fi kyau 245°C
Gilashin fiber ƙarfafa sa: 230℃ -270℃
Ga samfuran da ke da buƙatar saman da ya dace, yi amfani da zafin narkewa mai yawa da zafin mold.
5. Gudun allura
Ana amfani da saurin gudu a hankali don matakin juriya ga wuta, kuma ana amfani da saurin gudu don matakin juriya ga zafi. Idan buƙatun saman samfurin suna da yawa, ya kamata a yi amfani da tsarin sarrafa saurin allurar injection mai sauri da matakai da yawa.
6. Matsi na baya
Gabaɗaya, ƙarancin matsin lamba na baya, mafi kyau. Matsin baya da aka saba amfani da shi shine 5bar, kuma kayan rini suna buƙatar matsin lamba na baya mafi girma don daidaita launin.
7. Lokacin zama
A yanayin zafi na 265°C, lokacin zama na ABS a cikin silinda mai narkewa bai kamata ya wuce mintuna 5-6 ba. Lokacin da ake amfani da shi wajen hana harshen wuta ya fi guntu. Idan ya zama dole a dakatar da injin, ya kamata a rage zafin da aka saita zuwa 100°C da farko, sannan a tsaftace silinda mai narkewar da aka yi amfani da shi ta amfani da ABS na yau da kullun. Ya kamata a sanya cakuda da aka tsaftace a cikin ruwan sanyi don hana sake ruɓewa. Idan kuna buƙatar canzawa daga wasu robobi zuwa ABS, da farko dole ne ku tsaftace silinda mai narkewar da PS, PMMA ko PE. Wasu samfuran ABS ba su da matsala lokacin da aka sake su daga mold, amma za su canza launi bayan wani lokaci, wanda ƙila zai iya faruwa sakamakon zafi fiye da kima ko kuma filastik ɗin ya daɗe a cikin silinda mai narkewa.
8. Bayan sarrafa kayayyaki
Gabaɗaya, samfuran ABS ba sa buƙatar a yi musu aiki bayan an gama sarrafa su, sai dai a gasa samfuran da ke ɗauke da sinadarin electroplating (70-80°C, awanni 2-4) don su iya kashe alamun saman, kuma samfuran da ake buƙatar a yi musu electroplated ba za su iya amfani da sinadarin release ba, kuma dole ne a naɗe samfuran nan da nan bayan an fitar da su.
9. Abubuwan da ke buƙatar kulawa ta musamman yayin ƙera
Akwai nau'ikan ABS da dama (musamman ma'aunin hana harshen wuta), wanda narkewar sa ke da ƙarfi a saman sukurori bayan an yi amfani da filastik, kuma zai ruɓe bayan dogon lokaci. Idan yanayin da ke sama ya faru, ya zama dole a cire sashin haɗa sukurori da kuma matsewa don gogewa, sannan a riƙa tsaftace sukurori da PS, da sauransu.
Lokacin Saƙo: Agusta-09-2023
