Yin gyare-gyare shine tsarin yin nau'i-nau'i daban-daban na polymers (foda, pellets, mafita ko watsawa) cikin samfurori a cikin siffar da ake so. Shi ne mafi mahimmanci a cikin dukan tsari na kayan aikin filastik kuma shine samar da duk kayan aikin polymer ko bayanan martaba. Tsarin da ake bukata.Hanyoyin gyare-gyaren filastik sun haɗa da gyare-gyaren extrusion, gyare-gyaren allura, gyare-gyaren matsawa, gyare-gyaren canja wuri, gyare-gyaren laminate, gyare-gyaren gyare-gyare, gyaran calender, gyaran kumfa, thermoforming da sauran hanyoyi masu yawa, duk suna da karfin su.
Thermoforming wata hanya ce ta kera samfuran ta amfani da zanen gado na thermoplastic azaman albarkatun ƙasa, wanda za'a iya danganta shi da gyare-gyare na biyu na robobi. Na farko, takardar da aka yanke zuwa wani girman da siffar an sanya shi a kan firam na mold, kuma yana mai zafi zuwa yanayin zafi mai zurfi tsakanin Tg-Tf, an shimfiɗa takardar yayin da ake zafi, sa'an nan kuma ana matsa lamba don rufe shi. zuwa ga mold Tsarin siffar yana kama da siffar siffar, kuma ana iya samun samfurin bayan sanyaya, tsarawa da datsa.A lokacin thermoforming, matsa lamba da aka yi amfani da shi ya dogara ne akan bambancin matsa lamba da aka kafa ta hanyar vacuuming da gabatar da iska mai matsa lamba a bangarorin biyu na takardar, amma kuma ta hanyar matsa lamba na inji da kuma matsa lamba na hydraulic.
Siffar thermoforming ita ce cewa samar da matsa lamba yana da ƙasa, kuma tsarin thermoforming shine kamar haka:
allo (sheet) abu → clamping → dumama → matsa lamba → sanyaya → siffata → Semi-kammala kayayyakin → sanyaya → trimming. Thermoforming na ƙãre samfurin ya bambanta da fasahar sarrafa lokaci guda kamar gyare-gyaren allura da extrusion. Ba don guduro filastik ba ko pellets don dumama gyare-gyare ko ci gaba da gyare-gyare tare da ɓangaren giciye ɗaya ta hanyar mutu; kuma ba ta yin amfani da kayan aikin inji, kayan aiki da sauran hanyoyin sarrafa injina don yanke wani ɓangare na kayan filastik. Na gaba, don samun siffar da ake buƙata da girman da ake buƙata, amma don kayan filastik (sheet), dumama, ta yin amfani da mold, vacuum ko matsa lamba don lalata katako (sheet). Kai siffar da ake buƙata da girman da ake buƙata, haɓaka ta hanyoyin tallafi, don gane manufar aikace-aikacen.
An haɓaka fasahar thermoforming bisa tsarin samar da takardar ƙarfe. Ko da yake lokacin ci gaba ba shi da tsawo, amma saurin sarrafawa yana da sauri, digiri na atomatik yana da girma, ƙirar yana da arha kuma mai sauƙin maye gurbin, kuma daidaitawa yana da ƙarfi. Yana iya samar da kayayyaki masu girma kamar jirgin sama da sassan mota, ƙanana kamar kofuna na abin sha. Abubuwan da aka bari suna da sauƙin sake sarrafa su. Yana iya sarrafa zanen gado kamar bakin ciki kamar kauri 0.10mm. Wadannan zanen gado na iya zama m ko m, crystalline ko amorphous. Za a iya buga alamu a kan takardar farko, ko kuma za a iya buga alamu tare da launuka masu haske bayan gyare-gyare.
A cikin shekaru 30 zuwa 40 da suka gabata, saboda karuwar nau'ikan kayan aikin thermoplastic (sheet) azaman kayan albarkatun ƙasa, ci gaba da haɓaka kayan aikin thermoforming, da fa'idar aikace-aikacen samfuran, fasahar thermoforming ta haɓaka Tare da saurin haɓakawa, fasahar sa. kuma kayan aiki suna ƙara zama cikakke. Idan aka kwatanta da gyare-gyaren allura, thermoforming yana da fa'idodi na ingantaccen samarwa, hanya mai sauƙi, ƙarancin saka hannun jari na kayan aiki, da ikon kera samfuran tare da manyan filaye. Duk da haka, farashin kayan da ake amfani da su na thermoforming yana da yawa, kuma akwai matakai da yawa bayan aiwatarwa don samfurori. Tare da ci gaba da haɓaka fasahar samar da fasaha da kuma buƙatar haɓaka fa'idodin tattalin arziƙi, kayan aikin thermoforming sannu a hankali sun kawar da tsohon kawai azaman tsarin gyare-gyaren filastik mai zaman kansa (sheet), kuma ya fara haɗuwa tare da sauran kayan aikin samarwa don saduwa da abun da ke ciki. Cikakken layin samarwa don takamaiman buƙatu, don haka ƙara haɓaka haɓakar samarwa da rage farashin samarwa na samfurin ƙarshe.
Thermoforming ya dace musamman don kera samfuran tare da bangon bakin ciki da manyan wuraren ƙasa. Irin nau'ikan filastik da aka fi amfani da su sun haɗa da polystyrene, plexiglass, polyvinyl chloride, abs, polyethylene, polypropylene, polyamide, polycarbonate da polyethylene terephthalate.
Lokacin aikawa: Afrilu-20-2021