Gabatarwa:Gabaɗaya, daidaiton samfuran PTFE ba abu ne mai sauƙi don sarrafawa ba saboda ƙimar girman faɗaɗawar layinsa ya fi na karafa, kuma ɗayan zafin canjin ƙarar sa yana kusa da zafin ɗakin yana haifar da canjin girma kusan 1 zuwa 2%.Bugu da ƙari, samfuran PTFE masu bakin ciki an san suna da wahalar yin aiki saboda ba kawai PTFE mai sassauƙa da kayan roba ba ne, amma kuma damuwa na saura ya kasance bayan gyare-gyaren wani lokacin nakasu saboda tsananin zafi da aka haifar yayin aikin injin ko kuma saboda tsufa bayan machining.Irin wannan nakasawa na iya rinjayar daidaiton girman girman.
Game da daidaiton sarrafawa, samfuran PTFE ana buƙatar wasu lokuta haƙurin juzu'i iri ɗaya kamar na kayan ƙarfe.A irin waɗannan lokuta, halayen PTFE da aka bayyana a sama na iya haifar da matsala tsakanin masu amfani da masana'anta.Tare da wannan bangon, wannan rahoton yana bayyana daidaiton aiki na PTFE.
Hakuri Hakuri Gabaɗaya Halatta
Wannan ma'auni yana ƙayyadaddun ma'auni daga 1mm zuwa 1000 mm don lokacin da aka ƙera kayan samfurin PTFE ta hanyar matsawa ko gyare-gyaren extrusion.Kalmar “gaba ɗaya” da aka yi amfani da ita a cikin wannan ma'auni na nufin cewa za'a iya amfani da ma'auni lokacin da zane ya nuna babu adadi ko alamu.
Lokacin auna daidaiton aiki na PTFE, waɗannan mahimman halaye na PTFE yakamata
a yi la'akari:
1. PTFE yana da ƙananan ƙarancin thermal.
2. PTFE yana da babban ƙididdiga na fadada layin layi.
3. Girman PTFE yana canzawa sosai (da kusan 1 zuwa 2%) a kusa da 23°C.
4. PTFE na roba ne.
5. PTFE wani lokaci yana da damuwa saura.
Daga abin da ke sama, ƙaramin juzu'i na PTFE kusan ± 0.05 mm ko rabin ƙimar da aka ƙulla a cikin JIS K 6884 (jin 1), kodayake daidaiton mashin ɗin PTFE ya dogara da girman da siffar.
Koyaya, saboda elasticity na PTFE, ƙimar daidai zata iya bambanta idan an tura ƙarshen na'urar aunawa da ƙarfi akan samfurin PTFE.Misali, bambancin aƙalla 0.1 mm a ma'auni a wasu lokuta yana faruwa dangane da yadda ake tura ma'aunin mitoci akan samfurin PTFE.Masu amfani da masana'antun yakamata suyi la'akari da wannan batu.
Illar Magani Annealing
Yawancin lokaci, ana amfani da tsari na sintering (baking) kyauta ga PTFE bayan gyare-gyaren matsawa.A lokacin sintering, PTFE na ciki na danniya za a iya rage kwatanta da gyare-gyaren kayayyakin tare da coining tsari (wani tsari a cikin abin da wani abu da aka sintered a cikin wani mold sa'an nan sanyaya a karkashin matsin) wanda waje Layer aka quenched.
Koyaya, ana amfani da maganin annealing * akan kayan idan ana buƙatar daidaito mai girma ko siffar samfurin yana da rikitarwa.
Kawar da damuwa na ciki da aka haifar yayin aiwatar da gyare-gyare shine hanya mai mahimmanci don inganta daidaiton girma da kuma hana daga canjinsa na tsawon lokaci.
*Annealing: Hanyar da ake sanyaya samfuran da aka ƙera a hankali a yanayin zafin da aka ba su don cire damuwa na ciki wanda zafi ko damuwa na inji ke haifarwa.
Tashin Lafiya
Kamar yadda aka ƙulla a cikin Janar haƙuri don Polytetrafluoroethylene (Machine Cut), ya kamata a la'akari da halaye na kayan aiki lokacin saita ƙimar ƙasa.
Tunda zafi yana shafan guduro yayin da ake yin injin akan saman kuma yana da elasticity, ƙimar-wuta ba zata iya daidai da saman ƙarfe da aka ƙera ba.
Gabaɗaya, bambance-bambance a cikin ƙarewar ƙarancin ƙasa yana haifar da yanayin injina ciki har da juyawa da saurin ciyarwa da kayan aikin yanke (blades).
An gabatar da tsoffin alamomin kusan shekaru 60 da suka gabata, don haka an san su sosai.Zai ɗauki lokaci kafin sabbin alamomin su zama sananne a tsakanin masana'anta.Bugu da kari, a cikin yanayin sassa na aiki, dabarun da ake da su suna yawanci ana bin su.Saboda haka, yana da mahimmanci a fahimci dangantakar da ke tsakanin sababbin da tsoffin alamomi.
Lokacin aikawa: Janairu-14-2019